| | | | | | | | | | | | | | | | | | | | | |
<?xml version="1.0" encoding="windows-1252"?> |
<!-- Generated by Fujitsu XWand CS B0126 --> |
<linkbase xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.xbrl.org/2003/instance http://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd" xmlns="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xbrli="http://www.xbrl.org/2003/instance" xmlns:xbrldt="http://xbrl.org/2005/xbrldt"> |
| <roleRef roleURI="http://exeloncorp.com/role/DocumentDocumentAndEntityInformation" xlink:type="simple" xlink:href="exc-20120930.xsd#DocumentAndEntityInformation"/> |
| <roleRef roleURI="http://exeloncorp.com/role/StatementConsolidatedStatementsOfOperationsAndComprehensiveIncomeUnaudited" xlink:type="simple" xlink:href="exc-20120930.xsd#StatementConsolidatedStatementsOfOperationsAndComprehensiveIncome"/> |
| <roleRef roleURI="http://exeloncorp.com/role/StatementConsolidatedStatementsOfCashFlowsUnaudited" xlink:type="simple" xlink:href="exc-20120930.xsd#StatementConsolidatedStatementsOfCashFlows"/> |
| <roleRef roleURI="http://exeloncorp.com/role/StatementConsolidatedBalanceSheetsUnaudited" xlink:type="simple" xlink:href="exc-20120930.xsd#StatementConsolidatedBalanceSheets"/> |
| <roleRef roleURI="http://exeloncorp.com/role/StatementConsolidatedBalanceSheetsUnauditedParenthetical" xlink:type="simple" xlink:href="exc-20120930.xsd#StatementConsolidatedBalanceSheetsParenthetical"/> |
| <roleRef roleURI="http://exeloncorp.com/role/StatementConsolidatedStatementOfChangesInShareholdersEquityUnaudited" xlink:type="simple" xlink:href="exc-20120930.xsd#StatementConsolidatedStatementOfChangesInEquity"/> |
| <roleRef roleURI="http://exeloncorp.com/role/StatementConsolidatedStatementOfChangesInShareholdersEquityUnauditedParenthetical" xlink:type="simple" xlink:href="exc-20120930.xsd#StatementConsolidatedStatementOfChangesInEquityParenthetical"/> |
| <roleRef roleURI="http://exeloncorp.com/role/DisclosureRetirementBenefitsDetails" xlink:type="simple" xlink:href="exc-20120930.xsd#exc_ELRID_RetirementBenefitsDetails"/> |
| <roleRef roleURI="http://exeloncorp.com/role/SignificantAccountingPoliciesDetails" xlink:type="simple" xlink:href="exc-20120930.xsd#exc_ELRID_SignificantAccountingPoliciesDetails"/> |
| <roleRef roleURI="http://exeloncorp.com/role/DisclosureAssetRetirementObligationDetails" xlink:type="simple" xlink:href="exc-20120930.xsd#exc_ELRID_AssetRetirementObligationDetails"/> |
| <roleRef roleURI="http://exeloncorp.com/role/DisclosurePlantRetirementsDetails" xlink:type="simple" xlink:href="exc-20120930.xsd#exc_ELRID_PlantRetirementsDetails"/> |
| <roleRef roleURI="http://exeloncorp.com/role/DisclosureFairValueOfFinancialAssetsAndLiabilitiesTables" xlink:type="simple" xlink:href="exc-20120930.xsd#exc_ELRID_DisclosureFairValueOfFinancialAssetsAndLiabilitiesTables"/> |
| <roleRef roleURI="http://exeloncorp.com/role/FairValueOfFinancialAssetsAndLiabilitiesFairValueMeasurementsRecurringAndNonrecurringDetails" xlink:type="simple" xlink:href="exc-20120930.xsd#exc_ELRID_FairValueOfFinancialAssetsAndLiabilitiesFairValueMeasurementsRecurringAndNonrecurringDetails"/> |
| <roleRef roleURI="http://exeloncorp.com/role/DisclosureDebtAndCreditAgreementsYearEndTables" xlink:type="simple" xlink:href="exc-20120930.xsd#exc_ELRID_DisclosureDebtAndCreditAgreementsYearEndTables"/> |
| <roleRef roleURI="http://exeloncorp.com/role/DisclosureDebtAndCreditAgreementsDetails" xlink:type="simple" xlink:href="exc-20120930.xsd#exc_ELRID_DebtAndCreditAgreementsDetails"/> |
| <roleRef roleURI="http://exeloncorp.com/role/DisclosureSegmentInformationTables" xlink:type="simple" xlink:href="exc-20120930.xsd#exc_ELRID_DisclosureSegmentInformationTables"/> |
| <roleRef roleURI="http://exeloncorp.com/role/DisclosureSegmentInformationDetails" xlink:type="simple" xlink:href="exc-20120930.xsd#exc_ELRID_SegmentInformationDetails"/> |
| <roleRef roleURI="http://exeloncorp.com/role/DisclosureDerivativeFinancialInstrumentsFairValueMeasurmentsDetails" xlink:type="simple" xlink:href="exc-20120930.xsd#exc_ELRID_DerivativeFinancialInstrumentsFairValueMeasurmentsDetails"/> |
| <roleRef roleURI="http://exeloncorp.com/role/DisclosureCommitmentsAndContingenciesTables" xlink:type="simple" xlink:href="exc-20120930.xsd#exc_ELRID_DisclosureCommitmentsAndContingenciesTables"/> |
| <roleRef roleURI="http://exeloncorp.com/role/DisclosureCommitmentsAndContingenciesDetails" xlink:type="simple" xlink:href="exc-20120930.xsd#exc_ELRID_CommitmentsAndContingenciesDetails"/> |
| <roleRef roleURI="http://exeloncorp.com/role/DisclosureSupplementalFinancialInformationTables" xlink:type="simple" xlink:href="exc-20120930.xsd#exc_ELRID_DisclosureSupplementalFinancialInformationTables"/> |
| <roleRef roleURI="http://exeloncorp.com/role/DisclosureSupplementalFinancialInformationStatementOfOperationsDetails" xlink:type="simple" xlink:href="exc-20120930.xsd#exc_ELRID_SupplementalFinancialInformationStatementOfOperationsDetails"/> |
| <roleRef roleURI="http://exeloncorp.com/role/DisclosureRegulatoryMattersDetails" xlink:type="simple" xlink:href="exc-20120930.xsd#exc_ELRID_RegulatoryMattersDetails"/> |
| <roleRef roleURI="http://exeloncorp.com/role/DisclosureIncomeTaxesDetails" xlink:type="simple" xlink:href="exc-20120930.xsd#exc_ELRID_IncomeTaxesDetails"/> |
| <roleRef roleURI="http://exeloncorp.com/role/DisclosureMergerAndAcquisitionsExelonAndGeneration" xlink:type="simple" xlink:href="exc-20120930.xsd#exc_ELRID_MergerAndAcquisitionsExelonAndGeneration"/> |
| <roleRef roleURI="http://exeloncorp.com/role/DisclosureMergerAndAcquisitionsDetails" xlink:type="simple" xlink:href="exc-20120930.xsd#exc_ELRID_MergerAndAcquisitionsDetails"/> |
| <roleRef roleURI="http://exeloncorp.com/role/DisclosurePropertyPlantAndEquipmentTables" xlink:type="simple" xlink:href="exc-20120930.xsd#exc_ELRID_DisclosurePropertyPlantAndEquipmentTables"/> |
| <roleRef roleURI="http://exeloncorp.com/role/DisclosurePropertyPlantAndEquipmentDetails" xlink:type="simple" xlink:href="exc-20120930.xsd#exc_ELRID_PropertyPlantAndEquipmentDetails"/> |
| <roleRef roleURI="http://exeloncorp.com/role/DisclosureJointlyOwnedElectricUtilityPlantExelonGenerationAndPECO" xlink:type="simple" xlink:href="exc-20120930.xsd#exc_ELRID_DisclosureJointlyOwnedElectricUtilityPlantExelonGenerationAndPECO"/> |
| <roleRef roleURI="http://exeloncorp.com/role/DisclosurePreferredSecuritiesExelonComEdAndPECO" xlink:type="simple" xlink:href="exc-20120930.xsd#exc_ELRID_DisclosurePreferredSecuritiesExelonComEdAndPECO"/> |
| <roleRef roleURI="http://exeloncorp.com/role/DisclosureQuarterlyDataTables" xlink:type="simple" xlink:href="exc-20120930.xsd#exc_ELRID_DisclosureQuarterlyDataTables"/> |
| <roleRef roleURI="http://exeloncorp.com/role/DisclosureRelatedPartyTransactionsTables" xlink:type="simple" xlink:href="exc-20120930.xsd#exc_ELRID_DisclosureRelatedPartyTransactionsTables"/> |
| <roleRef roleURI="http://exeloncorp.com/role/DisclosurePreferredSecuritiesTables" xlink:type="simple" xlink:href="exc-20120930.xsd#exc_ELRID_DisclosurePreferredSecuritiesTables"/> |
| <roleRef roleURI="http://exeloncorp.com/role/DisclosureJointlyOwnedElectricUtilityPlantTables" xlink:type="simple" xlink:href="exc-20120930.xsd#exc_ELRID_DisclosureJointlyOwnedElectricUtilityPlantTables"/> |
| <roleRef roleURI="http://exeloncorp.com/role/DisclosureIntangibleAssetsTables" xlink:type="simple" xlink:href="exc-20120930.xsd#exc_ELRID_DisclosureIntangibleAssetsTables"/> |
| <roleRef roleURI="http://exeloncorp.com/role/AccountsReceivableDetails" xlink:type="simple" xlink:href="exc-20120930.xsd#exc_ELRID_AccountsReceivableDetails"/> |
| <roleRef roleURI="http://exeloncorp.com/role/JointlyOwnedElectricUtilityPlantDetails" xlink:type="simple" xlink:href="exc-20120930.xsd#exc_ELRID_JointlyOwnedElectricUtilityPlantDetails"/> |
| <roleRef roleURI="http://exeloncorp.com/role/DisclosurePreferredSecuritiesDetails" xlink:type="simple" xlink:href="exc-20120930.xsd#exc_ELRID_PreferredSecuritiesDetails"/> |
| <roleRef roleURI="http://exeloncorp.com/role/DisclosureStockBasedCompensationPlansDetails" xlink:type="simple" xlink:href="exc-20120930.xsd#exc_ELRID_StockBasedCompensationPlansDetails"/> |
| <roleRef roleURI="http://exeloncorp.com/role/DisclosureRelatedPartyTransactionsDetails" xlink:type="simple" xlink:href="exc-20120930.xsd#exc_ELRID_RelatedPartyTransactionsDetails"/> |
| <roleRef roleURI="http://exeloncorp.com/role/QuarterlyDataDetails" xlink:type="simple" xlink:href="exc-20120930.xsd#exc_ELRID_QuarterlyDataDetails"/> |
| <roleRef roleURI="http://exeloncorp.com/role/DisclosureIntangibleAssetsDetails" xlink:type="simple" xlink:href="exc-20120930.xsd#exc_ELRID_IntangibleAssetsDetails"/> |
| <roleRef roleURI="http://exeloncorp.com/role/StatementConsolidatedStatementsOfOperationsAndComprehensiveIncomeUnauditedParenthetical" xlink:type="simple" xlink:href="exc-20120930.xsd#exc_ELRID_StatementConsolidatedStatementsOfOperationsAndComprehensiveIncomeUnauditedParenthetical"/> |
| <roleRef roleURI="http://exeloncorp.com/role/DisclosureMergerAndAcquisitionsTables" xlink:type="simple" xlink:href="exc-20120930.xsd#exc_ELRID_MergerAndAcquisitionsTables"/> |
| <roleRef roleURI="http://exeloncorp.com/role/BasisOfPresentationDetails" xlink:type="simple" xlink:href="exc-20120930.xsd#exc_ELRID_BasisOfPresentationDetails"/> |
| <roleRef roleURI="http://exeloncorp.com/role/DisclosureNuclearDecommissioningExelonAndGeneration" xlink:type="simple" xlink:href="exc-20120930.xsd#exc_ELRID_DisclosureNuclearDecommissioningExelonAndGeneration"/> |
| <roleRef roleURI="http://exeloncorp.com/role/DisclosureNuclearDecommissioningTables" xlink:type="simple" xlink:href="exc-20120930.xsd#exc_ELRID_DisclosureNuclearDecommissioningTables"/> |
| <roleRef roleURI="http://exeloncorp.com/role/DisclosureNuclearDecommissioningDetails" xlink:type="simple" xlink:href="exc-20120930.xsd#exc_ELRID_NuclearDecommissioningDetails"/> |
| <roleRef roleURI="http://exeloncorp.com/role/DisclosureSubsequentEventDetails" xlink:type="simple" xlink:href="exc-20120930.xsd#exc_ELRID_SubsequentEventDetails"/> |
| <roleRef roleURI="http://exeloncorp.com/role/SubsequentEventsExelonPECOAndBGE" xlink:type="simple" xlink:href="exc-20120930.xsd#exc_ELRID_SubsequentEventsExelonPECOAndBGE"/> |
| <roleRef roleURI="http://exeloncorp.com/role/DisclosureInvestmentInConstellationEnergyNuclearGroupLLCExelonAndGeneration" xlink:type="simple" xlink:href="exc-20120930.xsd#exc_ELRID_InvestmentInConstellationEnergyNuclearGroupLLCExelonAndGeneration"/> |
| <roleRef roleURI="http://exeloncorp.com/role/DisclosureInvestmentInConstellationEnergyNuclearGroupLLCTables" xlink:type="simple" xlink:href="exc-20120930.xsd#exc_ELRID_InvestmentInConstellationEnergyNuclearGroupLLCTables"/> |
| <roleRef roleURI="http://exeloncorp.com/role/InvestmentInConstellationEnergyNuclearGroupLLCDetails" xlink:type="simple" xlink:href="exc-20120930.xsd#exc_ELRID_InvestmentInConstellationEnergyNuclearGroupLLCDetails"/> |
| <roleRef roleURI="http://exeloncorp.com/role/DisclosureBasisOfPresentationTables" xlink:type="simple" xlink:href="exc-20120930.xsd#exc_ELRID_BasisOfPresentationTables"/> |
| <roleRef roleURI="http://exeloncorp.com/role/DisclosureFairValueOfFinancialAssetsAndLiabilitiesFairValueInputsAssetsQuantitativeInformationDetails" xlink:type="simple" xlink:href="exc-20120930.xsd#exc_ELRID_FairValueOfFinancialAssetsAndLiabilitiesFairValueInputsAssetsQuantitativeInformationDetails"/> |
| <roleRef roleURI="http://exeloncorp.com/role/DisclosureDerivativeFinancialInstrumentsInterestRateRiskDetails" xlink:type="simple" xlink:href="exc-20120930.xsd#exc_ELRID_DerivativeFinancialInstrumentsInterestRateRiskDetails"/> |
| <roleRef roleURI="http://exeloncorp.com/role/DisclosureFairValueOfFinancialAssetsAndLiabilitiesFairValueAssetsLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationDetails" xlink:type="simple" xlink:href="exc-20120930.xsd#exc_ELRID_FairValueOfFinancialAssetsAndLiabilitiesFairValueAssetsLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationDetails"/> |
| <roleRef roleURI="http://exeloncorp.com/role/FairValueOfFinancialAssetsAndLiabilitiesFairValueByBalanceSheetGroupingDetails" xlink:type="simple" xlink:href="exc-20120930.xsd#exc_ELRID_FairValueOfFinancialAssetsAndLiabilitiesFairValueByBalanceSheetGroupingDetails"/> |
| <roleRef roleURI="http://exeloncorp.com/role/FairValueOfFinancialAssetsAndLiabilitiesFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisGainLossIncludedInEarningsDetails" xlink:type="simple" xlink:href="exc-20120930.xsd#exc_ELRID_FairValueOfFinancialAssetsAndLiabilitiesFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisGainLossIncludedInEarningsDetails"/> |
| <roleRef roleURI="http://exeloncorp.com/role/DebtAndCreditAgreementsMaturititesOfLongtermDebtDetails" xlink:type="simple" xlink:href="exc-20120930.xsd#exc_ELRID_DebtAndCreditAgreementsMaturititesOfLongtermDebtDetails"/> |
| <roleRef roleURI="http://exeloncorp.com/role/DisclosureSupplementalFinancialInformationCashFlowDetails" xlink:type="simple" xlink:href="exc-20120930.xsd#exc_ELRID_SupplementalFinancialInformationCashFlowDetails"/> |
| <roleRef roleURI="http://exeloncorp.com/role/SupplementalFinancialInformationBalanceSheetDetails" xlink:type="simple" xlink:href="exc-20120930.xsd#exc_ELRID_SupplementalFinancialInformationBalanceSheetDetails"/> |
| <roleRef roleURI="http://exeloncorp.com/role/GoodwillDetails" xlink:type="simple" xlink:href="exc-20120930.xsd#exc_ELRID_GoodwillDetails"/> |
| <roleRef roleURI="http://exeloncorp.com/role/RetirementBenefitsAssumptionsUsedInCalculationsDetails" xlink:type="simple" xlink:href="exc-20120930.xsd#exc_ELRID_RetirementBenefitsAssumptionsUsedInCalculationsDetails"/> |
| <roleRef roleURI="http://exeloncorp.com/role/RetirementBenefitsFairValueRecurringBasisDetails" xlink:type="simple" xlink:href="exc-20120930.xsd#exc_ELRID_RetirementBenefitsFairValueRecurringBasisDetails"/> |
| <roleRef roleURI="http://exeloncorp.com/role/DisclosureRetirementBenefitsFairValueUnobservableDetails" xlink:type="simple" xlink:href="exc-20120930.xsd#exc_ELRID_RetirementBenefitsFairValueUnobservableDetails"/> |
| <roleRef roleURI="http://exeloncorp.com/role/RetirementBenefitsAdditionalDetails" xlink:type="simple" xlink:href="exc-20120930.xsd#exc_ELRID_RetirementBenefitsAdditionalDetails"/> |
| <roleRef roleURI="http://exeloncorp.com/role/DisclosureDerivativeFinancialInstrumentsCommodityPriceRiskDetails" xlink:type="simple" xlink:href="exc-20120930.xsd#exc_ELRID_DerivativeFinancialInstrumentsCommodityPriceRiskDetails"/> |
| <roleRef roleURI="http://exeloncorp.com/role/DisclosureDerivativeFinancialInstrumentsCreditRiskDetails" xlink:type="simple" xlink:href="exc-20120930.xsd#exc_ELRID_DerivativeFinancialInstrumentsCreditRiskDetails"/> |
| <roleRef roleURI="http://exeloncorp.com/role/DerivativeFinancialInstrumentsCollateralAndContingentRelatedFeaturesDetails" xlink:type="simple" xlink:href="exc-20120930.xsd#exc_ELRID_DerivativeFinancialInstrumentsCollateralAndContingentRelatedFeaturesDetails"/> |
| <arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-domain"/> |
| <arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/domain-member" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#domain-member"/> |
| <arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#hypercube-dimension"/> |
| <arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/all" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#all"/> |
| <arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-default"/> |
| <definitionLink xlink:type="extended" xlink:role="http://exeloncorp.com/role/DocumentDocumentAndEntityInformation"> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_95"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_96"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_dei_LegalEntityAxis_95" xlink:to="Locator_dei_EntityDomain_96" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_97"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ExelonGenerationCoLLCMember" xlink:label="Locator_exc_ExelonGenerationCoLLCMember_98"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_97" xlink:to="Locator_exc_ExelonGenerationCoLLCMember_98" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_99"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CommonwealthEdisonCoMember" xlink:label="Locator_exc_CommonwealthEdisonCoMember_100"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_99" xlink:to="Locator_exc_CommonwealthEdisonCoMember_100" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_101"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PecoEnergyCoMember" xlink:label="Locator_exc_PecoEnergyCoMember_102"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_101" xlink:to="Locator_exc_PecoEnergyCoMember_102" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_103"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BaltimoreGasAndElectricCompanyMember" xlink:label="Locator_exc_BaltimoreGasAndElectricCompanyMember_104"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_103" xlink:to="Locator_exc_BaltimoreGasAndElectricCompanyMember_104" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementTable" xlink:label="Locator_us-gaap_StatementTable_93"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_94"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_us-gaap_StatementTable_93" xlink:to="Locator_dei_LegalEntityAxis_94" order="0.0"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementLineItems" xlink:label="Locator_us-gaap_StatementLineItems_105"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_TradingSymbol" xlink:label="Locator_dei_TradingSymbol_106"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_StatementLineItems_105" xlink:to="Locator_dei_TradingSymbol_106" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementLineItems" xlink:label="Locator_us-gaap_StatementLineItems_107"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityRegistrantName" xlink:label="Locator_dei_EntityRegistrantName_108"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_StatementLineItems_107" xlink:to="Locator_dei_EntityRegistrantName_108" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementLineItems" xlink:label="Locator_us-gaap_StatementLineItems_109"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityCentralIndexKey" xlink:label="Locator_dei_EntityCentralIndexKey_110"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_StatementLineItems_109" xlink:to="Locator_dei_EntityCentralIndexKey_110" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementLineItems" xlink:label="Locator_us-gaap_StatementLineItems_111"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_DocumentType" xlink:label="Locator_dei_DocumentType_112"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_StatementLineItems_111" xlink:to="Locator_dei_DocumentType_112" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementLineItems" xlink:label="Locator_us-gaap_StatementLineItems_113"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_DocumentPeriodEndDate" xlink:label="Locator_dei_DocumentPeriodEndDate_114"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_StatementLineItems_113" xlink:to="Locator_dei_DocumentPeriodEndDate_114" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementLineItems" xlink:label="Locator_us-gaap_StatementLineItems_115"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_AmendmentFlag" xlink:label="Locator_dei_AmendmentFlag_116"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_StatementLineItems_115" xlink:to="Locator_dei_AmendmentFlag_116" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementLineItems" xlink:label="Locator_us-gaap_StatementLineItems_117"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_DocumentFiscalYearFocus" xlink:label="Locator_dei_DocumentFiscalYearFocus_118"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_StatementLineItems_117" xlink:to="Locator_dei_DocumentFiscalYearFocus_118" order="7.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementLineItems" xlink:label="Locator_us-gaap_StatementLineItems_119"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_DocumentFiscalPeriodFocus" xlink:label="Locator_dei_DocumentFiscalPeriodFocus_120"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_StatementLineItems_119" xlink:to="Locator_dei_DocumentFiscalPeriodFocus_120" order="8.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementLineItems" xlink:label="Locator_us-gaap_StatementLineItems_121"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_CurrentFiscalYearEndDate" xlink:label="Locator_dei_CurrentFiscalYearEndDate_122"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_StatementLineItems_121" xlink:to="Locator_dei_CurrentFiscalYearEndDate_122" order="9.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementLineItems" xlink:label="Locator_us-gaap_StatementLineItems_123"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityWellKnownSeasonedIssuer" xlink:label="Locator_dei_EntityWellKnownSeasonedIssuer_124"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_StatementLineItems_123" xlink:to="Locator_dei_EntityWellKnownSeasonedIssuer_124" order="10.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementLineItems" xlink:label="Locator_us-gaap_StatementLineItems_125"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityVoluntaryFilers" xlink:label="Locator_dei_EntityVoluntaryFilers_126"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_StatementLineItems_125" xlink:to="Locator_dei_EntityVoluntaryFilers_126" order="11.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementLineItems" xlink:label="Locator_us-gaap_StatementLineItems_127"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityCurrentReportingStatus" xlink:label="Locator_dei_EntityCurrentReportingStatus_128"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_StatementLineItems_127" xlink:to="Locator_dei_EntityCurrentReportingStatus_128" order="12.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementLineItems" xlink:label="Locator_us-gaap_StatementLineItems_129"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityFilerCategory" xlink:label="Locator_dei_EntityFilerCategory_130"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_StatementLineItems_129" xlink:to="Locator_dei_EntityFilerCategory_130" order="13.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementLineItems" xlink:label="Locator_us-gaap_StatementLineItems_131"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityCommonStockSharesOutstanding" xlink:label="Locator_dei_EntityCommonStockSharesOutstanding_132"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_StatementLineItems_131" xlink:to="Locator_dei_EntityCommonStockSharesOutstanding_132" order="14.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementLineItems" xlink:label="Locator_us-gaap_StatementLineItems_133"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityPublicFloat" xlink:label="Locator_dei_EntityPublicFloat_134"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_StatementLineItems_133" xlink:to="Locator_dei_EntityPublicFloat_134" order="15.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementLineItems" xlink:label="Locator_us-gaap_StatementLineItems_89"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementTable" xlink:label="Locator_us-gaap_StatementTable_90"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="Locator_us-gaap_StatementLineItems_89" xlink:to="Locator_us-gaap_StatementTable_90" order="0.5" xbrldt:contextElement="segment" xbrldt:closed="true"/> |
| | </definitionLink> |
| <definitionLink xlink:type="extended" xlink:role="http://exeloncorp.com/role/StatementConsolidatedStatementsOfOperationsAndComprehensiveIncomeUnaudited"> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_373"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_374"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_dei_LegalEntityAxis_373" xlink:to="Locator_dei_EntityDomain_374" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_375"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ExelonGenerationCoLLCMember" xlink:label="Locator_exc_ExelonGenerationCoLLCMember_376"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_375" xlink:to="Locator_exc_ExelonGenerationCoLLCMember_376" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_377"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CommonwealthEdisonCoMember" xlink:label="Locator_exc_CommonwealthEdisonCoMember_378"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_377" xlink:to="Locator_exc_CommonwealthEdisonCoMember_378" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_379"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PecoEnergyCoMember" xlink:label="Locator_exc_PecoEnergyCoMember_380"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_379" xlink:to="Locator_exc_PecoEnergyCoMember_380" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_381"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BaltimoreGasAndElectricCompanyMember" xlink:label="Locator_exc_BaltimoreGasAndElectricCompanyMember_382"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_381" xlink:to="Locator_exc_BaltimoreGasAndElectricCompanyMember_382" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementTable" xlink:label="Locator_us-gaap_StatementTable_371"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_372"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_us-gaap_StatementTable_371" xlink:to="Locator_dei_LegalEntityAxis_372" order="0.0"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RevenuesAbstract" xlink:label="Locator_us-gaap_RevenuesAbstract_385"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ElectricalGenerationRevenue" xlink:label="Locator_us-gaap_ElectricalGenerationRevenue_386"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RevenuesAbstract_385" xlink:to="Locator_us-gaap_ElectricalGenerationRevenue_386" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RevenuesAbstract" xlink:label="Locator_us-gaap_RevenuesAbstract_387"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ElectricalTransmissionAndDistributionRevenue" xlink:label="Locator_us-gaap_ElectricalTransmissionAndDistributionRevenue_388"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RevenuesAbstract_387" xlink:to="Locator_us-gaap_ElectricalTransmissionAndDistributionRevenue_388" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RevenuesAbstract" xlink:label="Locator_us-gaap_RevenuesAbstract_389"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_UtilityRevenue" xlink:label="Locator_us-gaap_UtilityRevenue_390"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RevenuesAbstract_389" xlink:to="Locator_us-gaap_UtilityRevenue_390" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RevenuesAbstract" xlink:label="Locator_us-gaap_RevenuesAbstract_391"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RelatedPartyTransactionRevenuesFromTransactionsWithRelatedParty" xlink:label="Locator_us-gaap_RelatedPartyTransactionRevenuesFromTransactionsWithRelatedParty_392"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RevenuesAbstract_391" xlink:to="Locator_us-gaap_RelatedPartyTransactionRevenuesFromTransactionsWithRelatedParty_392" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RevenuesAbstract" xlink:label="Locator_us-gaap_RevenuesAbstract_393"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_Revenues" xlink:label="Locator_us-gaap_Revenues_394"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RevenuesAbstract_393" xlink:to="Locator_us-gaap_Revenues_394" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementLineItems" xlink:label="Locator_us-gaap_StatementLineItems_383"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RevenuesAbstract" xlink:label="Locator_us-gaap_RevenuesAbstract_384"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_StatementLineItems_383" xlink:to="Locator_us-gaap_RevenuesAbstract_384" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementLineItems" xlink:label="Locator_us-gaap_StatementLineItems_395"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CostsAndExpensesAbstract" xlink:label="Locator_us-gaap_CostsAndExpensesAbstract_396"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_StatementLineItems_395" xlink:to="Locator_us-gaap_CostsAndExpensesAbstract_396" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CostsAndExpensesAbstract" xlink:label="Locator_us-gaap_CostsAndExpensesAbstract_397"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CostOfGoodsAndServicesEnergyCommoditiesAndServices" xlink:label="Locator_us-gaap_CostOfGoodsAndServicesEnergyCommoditiesAndServices_398"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_CostsAndExpensesAbstract_397" xlink:to="Locator_us-gaap_CostOfGoodsAndServicesEnergyCommoditiesAndServices_398" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CostsAndExpensesAbstract" xlink:label="Locator_us-gaap_CostsAndExpensesAbstract_399"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CostOfGoodsAndServicesEnergyCommoditiesAndServicesFromAffiliate" xlink:label="Locator_exc_CostOfGoodsAndServicesEnergyCommoditiesAndServicesFromAffiliate_400"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_CostsAndExpensesAbstract_399" xlink:to="Locator_exc_CostOfGoodsAndServicesEnergyCommoditiesAndServicesFromAffiliate_400" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CostsAndExpensesAbstract" xlink:label="Locator_us-gaap_CostsAndExpensesAbstract_401"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CostOfPurchasedPower" xlink:label="Locator_us-gaap_CostOfPurchasedPower_402"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_CostsAndExpensesAbstract_401" xlink:to="Locator_us-gaap_CostOfPurchasedPower_402" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CostsAndExpensesAbstract" xlink:label="Locator_us-gaap_CostsAndExpensesAbstract_403"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CostOfPurchasedPowerAffiliate" xlink:label="Locator_exc_CostOfPurchasedPowerAffiliate_404"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_CostsAndExpensesAbstract_403" xlink:to="Locator_exc_CostOfPurchasedPowerAffiliate_404" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CostsAndExpensesAbstract" xlink:label="Locator_us-gaap_CostsAndExpensesAbstract_405"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FuelCosts" xlink:label="Locator_us-gaap_FuelCosts_406"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_CostsAndExpensesAbstract_405" xlink:to="Locator_us-gaap_FuelCosts_406" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CostsAndExpensesAbstract" xlink:label="Locator_us-gaap_CostsAndExpensesAbstract_407"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherCostAndExpenseOperating" xlink:label="Locator_us-gaap_OtherCostAndExpenseOperating_408"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_CostsAndExpensesAbstract_407" xlink:to="Locator_us-gaap_OtherCostAndExpenseOperating_408" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CostsAndExpensesAbstract" xlink:label="Locator_us-gaap_CostsAndExpensesAbstract_409"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty" xlink:label="Locator_us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty_410"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_CostsAndExpensesAbstract_409" xlink:to="Locator_us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty_410" order="7.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CostsAndExpensesAbstract" xlink:label="Locator_us-gaap_CostsAndExpensesAbstract_411"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OtherCostAndExpenseOperatingRegulatoryRequiredPrograms" xlink:label="Locator_exc_OtherCostAndExpenseOperatingRegulatoryRequiredPrograms_412"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_CostsAndExpensesAbstract_411" xlink:to="Locator_exc_OtherCostAndExpenseOperatingRegulatoryRequiredPrograms_412" order="8.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CostsAndExpensesAbstract" xlink:label="Locator_us-gaap_CostsAndExpensesAbstract_413"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherDepreciationAndAmortization" xlink:label="Locator_us-gaap_OtherDepreciationAndAmortization_414"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_CostsAndExpensesAbstract_413" xlink:to="Locator_us-gaap_OtherDepreciationAndAmortization_414" order="9.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CostsAndExpensesAbstract" xlink:label="Locator_us-gaap_CostsAndExpensesAbstract_415"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_TaxesExcludingIncomeAndExciseTaxes" xlink:label="Locator_us-gaap_TaxesExcludingIncomeAndExciseTaxes_416"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_CostsAndExpensesAbstract_415" xlink:to="Locator_us-gaap_TaxesExcludingIncomeAndExciseTaxes_416" order="10.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CostsAndExpensesAbstract" xlink:label="Locator_us-gaap_CostsAndExpensesAbstract_417"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CostsAndExpenses" xlink:label="Locator_us-gaap_CostsAndExpenses_418"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_CostsAndExpensesAbstract_417" xlink:to="Locator_us-gaap_CostsAndExpenses_418" order="11.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementLineItems" xlink:label="Locator_us-gaap_StatementLineItems_419"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_IncomeLossFromOperatingEquityMethodInvestments" xlink:label="Locator_exc_IncomeLossFromOperatingEquityMethodInvestments_420"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_StatementLineItems_419" xlink:to="Locator_exc_IncomeLossFromOperatingEquityMethodInvestments_420" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementLineItems" xlink:label="Locator_us-gaap_StatementLineItems_421"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OperatingIncomeLoss" xlink:label="Locator_us-gaap_OperatingIncomeLoss_422"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_StatementLineItems_421" xlink:to="Locator_us-gaap_OperatingIncomeLoss_422" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementLineItems" xlink:label="Locator_us-gaap_StatementLineItems_423"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NonoperatingIncomeExpenseAbstract" xlink:label="Locator_us-gaap_NonoperatingIncomeExpenseAbstract_424"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_StatementLineItems_423" xlink:to="Locator_us-gaap_NonoperatingIncomeExpenseAbstract_424" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NonoperatingIncomeExpenseAbstract" xlink:label="Locator_us-gaap_NonoperatingIncomeExpenseAbstract_425"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_InterestExpense" xlink:label="Locator_us-gaap_InterestExpense_426"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_NonoperatingIncomeExpenseAbstract_425" xlink:to="Locator_us-gaap_InterestExpense_426" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NonoperatingIncomeExpenseAbstract" xlink:label="Locator_us-gaap_NonoperatingIncomeExpenseAbstract_427"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_InterestExpenseToAffiliatesNet" xlink:label="Locator_exc_InterestExpenseToAffiliatesNet_428"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_NonoperatingIncomeExpenseAbstract_427" xlink:to="Locator_exc_InterestExpenseToAffiliatesNet_428" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NonoperatingIncomeExpenseAbstract" xlink:label="Locator_us-gaap_NonoperatingIncomeExpenseAbstract_429"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherNonoperatingIncomeExpense" xlink:label="Locator_us-gaap_OtherNonoperatingIncomeExpense_430"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_NonoperatingIncomeExpenseAbstract_429" xlink:to="Locator_us-gaap_OtherNonoperatingIncomeExpense_430" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NonoperatingIncomeExpenseAbstract" xlink:label="Locator_us-gaap_NonoperatingIncomeExpenseAbstract_431"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NonoperatingIncomeExpense" xlink:label="Locator_us-gaap_NonoperatingIncomeExpense_432"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_NonoperatingIncomeExpenseAbstract_431" xlink:to="Locator_us-gaap_NonoperatingIncomeExpense_432" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementLineItems" xlink:label="Locator_us-gaap_StatementLineItems_433"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic" xlink:label="Locator_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic_434"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_StatementLineItems_433" xlink:to="Locator_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic_434" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementLineItems" xlink:label="Locator_us-gaap_StatementLineItems_435"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="Locator_us-gaap_IncomeTaxExpenseBenefit_436"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_StatementLineItems_435" xlink:to="Locator_us-gaap_IncomeTaxExpenseBenefit_436" order="7.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementLineItems" xlink:label="Locator_us-gaap_StatementLineItems_437"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_IncomeLossFromContinuingOperations" xlink:label="Locator_us-gaap_IncomeLossFromContinuingOperations_438"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_StatementLineItems_437" xlink:to="Locator_us-gaap_IncomeLossFromContinuingOperations_438" order="8.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementLineItems" xlink:label="Locator_us-gaap_StatementLineItems_439"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAbstract" xlink:label="Locator_us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAbstract_440"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_StatementLineItems_439" xlink:to="Locator_us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAbstract_440" order="9.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAbstract" xlink:label="Locator_us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAbstract_441"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax" xlink:label="Locator_us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax_442"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAbstract_441" xlink:to="Locator_us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax_442" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAbstract" xlink:label="Locator_us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAbstract_443"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax" xlink:label="Locator_us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax_444"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAbstract_443" xlink:to="Locator_us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax_444" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAbstract" xlink:label="Locator_us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAbstract_445"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax" xlink:label="Locator_us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax_446"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAbstract_445" xlink:to="Locator_us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax_446" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementLineItems" xlink:label="Locator_us-gaap_StatementLineItems_449"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DividendsPreferredStock" xlink:label="Locator_us-gaap_DividendsPreferredStock_450"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_StatementLineItems_449" xlink:to="Locator_us-gaap_DividendsPreferredStock_450" order="11.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementLineItems" xlink:label="Locator_us-gaap_StatementLineItems_451"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_IncomeLossAttributableToNoncontrollingInterest" xlink:label="Locator_us-gaap_IncomeLossAttributableToNoncontrollingInterest_452"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_StatementLineItems_451" xlink:to="Locator_us-gaap_IncomeLossAttributableToNoncontrollingInterest_452" order="12.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementLineItems" xlink:label="Locator_us-gaap_StatementLineItems_453"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NetIncomeLossAttributableToNoncontrollingInterestAndPreferredStockDividendsAndOtherAdjustments" xlink:label="Locator_exc_NetIncomeLossAttributableToNoncontrollingInterestAndPreferredStockDividendsAndOtherAdjustments_454"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_StatementLineItems_453" xlink:to="Locator_exc_NetIncomeLossAttributableToNoncontrollingInterestAndPreferredStockDividendsAndOtherAdjustments_454" order="13.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementLineItems" xlink:label="Locator_us-gaap_StatementLineItems_455"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_IncomeLossIncludingPortionAttributableToNoncontrollingInterest" xlink:label="Locator_us-gaap_IncomeLossIncludingPortionAttributableToNoncontrollingInterest_456"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_StatementLineItems_455" xlink:to="Locator_us-gaap_IncomeLossIncludingPortionAttributableToNoncontrollingInterest_456" order="14.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementLineItems" xlink:label="Locator_us-gaap_StatementLineItems_459"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract" xlink:label="Locator_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_460"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_StatementLineItems_459" xlink:to="Locator_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_460" order="16.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract" xlink:label="Locator_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_461"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPeriodIncreaseDecreaseAbstract" xlink:label="Locator_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPeriodIncreaseDecreaseAbstract_462"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_461" xlink:to="Locator_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPeriodIncreaseDecreaseAbstract_462" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPeriodIncreaseDecreaseAbstract" xlink:label="Locator_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPeriodIncreaseDecreaseAbstract_463"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherComprehensiveIncomeAmortizationOfDefinedBenefitPlanNetPriorServiceCostRecognizedInNetPeriodicPensionCostNetOfTax" xlink:label="Locator_us-gaap_OtherComprehensiveIncomeAmortizationOfDefinedBenefitPlanNetPriorServiceCostRecognizedInNetPeriodicPensionCostNetOfTax_464"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPeriodIncreaseDecreaseAbstract_463" xlink:to="Locator_us-gaap_OtherComprehensiveIncomeAmortizationOfDefinedBenefitPlanNetPriorServiceCostRecognizedInNetPeriodicPensionCostNetOfTax_464" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPeriodIncreaseDecreaseAbstract" xlink:label="Locator_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPeriodIncreaseDecreaseAbstract_465"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherComprehensiveIncomeReclassificationOfDefinedBenefitPlansNetGainLossRecognizedInNetPeriodicBenefitCostNetOfTax" xlink:label="Locator_us-gaap_OtherComprehensiveIncomeReclassificationOfDefinedBenefitPlansNetGainLossRecognizedInNetPeriodicBenefitCostNetOfTax_466"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPeriodIncreaseDecreaseAbstract_465" xlink:to="Locator_us-gaap_OtherComprehensiveIncomeReclassificationOfDefinedBenefitPlansNetGainLossRecognizedInNetPeriodicBenefitCostNetOfTax_466" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPeriodIncreaseDecreaseAbstract" xlink:label="Locator_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPeriodIncreaseDecreaseAbstract_467"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherComprehensiveIncomeReclassificationOfDefinedBenefitPlanNetTransitionAssetObligationRecognizedInNetPeriodicBenefitCostNetOfTax" xlink:label="Locator_us-gaap_OtherComprehensiveIncomeReclassificationOfDefinedBenefitPlanNetTransitionAssetObligationRecognizedInNetPeriodicBenefitCostNetOfTax_468"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPeriodIncreaseDecreaseAbstract_467" xlink:to="Locator_us-gaap_OtherComprehensiveIncomeReclassificationOfDefinedBenefitPlanNetTransitionAssetObligationRecognizedInNetPeriodicBenefitCostNetOfTax_468" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPeriodIncreaseDecreaseAbstract" xlink:label="Locator_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPeriodIncreaseDecreaseAbstract_469"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OtherComprehensiveIncomePensionAndNonPensionPostretirementBenefitPlanValuationAdjustmentNetOfTax" xlink:label="Locator_exc_OtherComprehensiveIncomePensionAndNonPensionPostretirementBenefitPlanValuationAdjustmentNetOfTax_470"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPeriodIncreaseDecreaseAbstract_469" xlink:to="Locator_exc_OtherComprehensiveIncomePensionAndNonPensionPostretirementBenefitPlanValuationAdjustmentNetOfTax_470" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract" xlink:label="Locator_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_471"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax" xlink:label="Locator_us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax_472"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_471" xlink:to="Locator_us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax_472" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract" xlink:label="Locator_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_473"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OtherComprehensiveIncomeUnrealizedIncomeLossOnEquityInvestmentsArisingDuringPeriodNetOfTax" xlink:label="Locator_exc_OtherComprehensiveIncomeUnrealizedIncomeLossOnEquityInvestmentsArisingDuringPeriodNetOfTax_474"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_473" xlink:to="Locator_exc_OtherComprehensiveIncomeUnrealizedIncomeLossOnEquityInvestmentsArisingDuringPeriodNetOfTax_474" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract" xlink:label="Locator_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_475"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherComprehensiveIncomeReclassificationAdjustmentOnDerivativesIncludedInNetIncomeNetOfTax" xlink:label="Locator_us-gaap_OtherComprehensiveIncomeReclassificationAdjustmentOnDerivativesIncludedInNetIncomeNetOfTax_476"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_475" xlink:to="Locator_us-gaap_OtherComprehensiveIncomeReclassificationAdjustmentOnDerivativesIncludedInNetIncomeNetOfTax_476" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract" xlink:label="Locator_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_477"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax" xlink:label="Locator_us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax_478"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_477" xlink:to="Locator_us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax_478" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract" xlink:label="Locator_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_479"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax" xlink:label="Locator_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax_480"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_479" xlink:to="Locator_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax_480" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract" xlink:label="Locator_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_481"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecrease" xlink:label="Locator_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecrease_482"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_481" xlink:to="Locator_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecrease_482" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract" xlink:label="Locator_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_483"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ComprehensiveIncomeNetOfTax" xlink:label="Locator_us-gaap_ComprehensiveIncomeNetOfTax_484"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_483" xlink:to="Locator_us-gaap_ComprehensiveIncomeNetOfTax_484" order="7.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementLineItems" xlink:label="Locator_us-gaap_StatementLineItems_485"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract" xlink:label="Locator_us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract_486"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_StatementLineItems_485" xlink:to="Locator_us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract_486" order="17.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract" xlink:label="Locator_us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract_487"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingBasic" xlink:label="Locator_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_488"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract_487" xlink:to="Locator_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_488" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract" xlink:label="Locator_us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract_489"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding" xlink:label="Locator_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_490"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract_489" xlink:to="Locator_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_490" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementLineItems" xlink:label="Locator_us-gaap_StatementLineItems_491"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_EarningsPerShareBasicAbstract" xlink:label="Locator_us-gaap_EarningsPerShareBasicAbstract_492"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_StatementLineItems_491" xlink:to="Locator_us-gaap_EarningsPerShareBasicAbstract_492" order="18.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_EarningsPerShareBasicAbstract" xlink:label="Locator_us-gaap_EarningsPerShareBasicAbstract_493"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsPerBasicShare" xlink:label="Locator_us-gaap_IncomeLossFromContinuingOperationsPerBasicShare_494"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_EarningsPerShareBasicAbstract_493" xlink:to="Locator_us-gaap_IncomeLossFromContinuingOperationsPerBasicShare_494" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_EarningsPerShareBasicAbstract" xlink:label="Locator_us-gaap_EarningsPerShareBasicAbstract_495"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare" xlink:label="Locator_us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare_496"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_EarningsPerShareBasicAbstract_495" xlink:to="Locator_us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare_496" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_EarningsPerShareBasicAbstract" xlink:label="Locator_us-gaap_EarningsPerShareBasicAbstract_497"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_EarningsPerShareBasic" xlink:label="Locator_us-gaap_EarningsPerShareBasic_498"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_EarningsPerShareBasicAbstract_497" xlink:to="Locator_us-gaap_EarningsPerShareBasic_498" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementLineItems" xlink:label="Locator_us-gaap_StatementLineItems_499"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_EarningsPerShareDilutedAbstract" xlink:label="Locator_us-gaap_EarningsPerShareDilutedAbstract_500"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_StatementLineItems_499" xlink:to="Locator_us-gaap_EarningsPerShareDilutedAbstract_500" order="19.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_EarningsPerShareDilutedAbstract" xlink:label="Locator_us-gaap_EarningsPerShareDilutedAbstract_501"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare" xlink:label="Locator_us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare_502"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_EarningsPerShareDilutedAbstract_501" xlink:to="Locator_us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare_502" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_EarningsPerShareDilutedAbstract" xlink:label="Locator_us-gaap_EarningsPerShareDilutedAbstract_503"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare" xlink:label="Locator_us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare_504"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_EarningsPerShareDilutedAbstract_503" xlink:to="Locator_us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare_504" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_EarningsPerShareDilutedAbstract" xlink:label="Locator_us-gaap_EarningsPerShareDilutedAbstract_505"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_EarningsPerShareDiluted" xlink:label="Locator_us-gaap_EarningsPerShareDiluted_506"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_EarningsPerShareDilutedAbstract_505" xlink:to="Locator_us-gaap_EarningsPerShareDiluted_506" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementLineItems" xlink:label="Locator_us-gaap_StatementLineItems_507"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CommonStockDividendsPerShareCashPaid" xlink:label="Locator_us-gaap_CommonStockDividendsPerShareCashPaid_508"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_StatementLineItems_507" xlink:to="Locator_us-gaap_CommonStockDividendsPerShareCashPaid_508" order="20.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementLineItems" xlink:label="Locator_us-gaap_StatementLineItems_447"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="Locator_us-gaap_NetIncomeLoss_448"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_StatementLineItems_447" xlink:to="Locator_us-gaap_NetIncomeLoss_448" order="10.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementLineItems" xlink:label="Locator_us-gaap_StatementLineItems_457"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic" xlink:label="Locator_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_458"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_StatementLineItems_457" xlink:to="Locator_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_458" order="15.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementLineItems" xlink:label="Locator_us-gaap_StatementLineItems_189"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementTable" xlink:label="Locator_us-gaap_StatementTable_190"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="Locator_us-gaap_StatementLineItems_189" xlink:to="Locator_us-gaap_StatementTable_190" order="0.5" xbrldt:contextElement="segment" xbrldt:closed="true"/> |
| | </definitionLink> |
| <definitionLink xlink:type="extended" xlink:role="http://exeloncorp.com/role/StatementConsolidatedStatementsOfCashFlowsUnaudited"> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_733"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_734"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_dei_LegalEntityAxis_733" xlink:to="Locator_dei_EntityDomain_734" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_735"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ExelonGenerationCoLLCMember" xlink:label="Locator_exc_ExelonGenerationCoLLCMember_736"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_735" xlink:to="Locator_exc_ExelonGenerationCoLLCMember_736" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_737"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CommonwealthEdisonCoMember" xlink:label="Locator_exc_CommonwealthEdisonCoMember_738"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_737" xlink:to="Locator_exc_CommonwealthEdisonCoMember_738" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_739"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PecoEnergyCoMember" xlink:label="Locator_exc_PecoEnergyCoMember_740"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_739" xlink:to="Locator_exc_PecoEnergyCoMember_740" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_741"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BaltimoreGasAndElectricCompanyMember" xlink:label="Locator_exc_BaltimoreGasAndElectricCompanyMember_742"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_741" xlink:to="Locator_exc_BaltimoreGasAndElectricCompanyMember_742" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementTable" xlink:label="Locator_us-gaap_StatementTable_731"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_732"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_us-gaap_StatementTable_731" xlink:to="Locator_dei_LegalEntityAxis_732" order="0.0"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementLineItems" xlink:label="Locator_us-gaap_StatementLineItems_743"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract" xlink:label="Locator_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_744"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_StatementLineItems_743" xlink:to="Locator_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_744" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract" xlink:label="Locator_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_745"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="Locator_us-gaap_NetIncomeLoss_746"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_745" xlink:to="Locator_us-gaap_NetIncomeLoss_746" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract" xlink:label="Locator_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_747"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:label="Locator_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_748"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_747" xlink:to="Locator_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_748" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:label="Locator_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_749"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DepreciationAmortizationAndAccretionNet" xlink:label="Locator_us-gaap_DepreciationAmortizationAndAccretionNet_750"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_749" xlink:to="Locator_us-gaap_DepreciationAmortizationAndAccretionNet_750" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:label="Locator_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_751"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ImpairmentOfLongLivedAssetsHeldForUse" xlink:label="Locator_us-gaap_ImpairmentOfLongLivedAssetsHeldForUse_752"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_751" xlink:to="Locator_us-gaap_ImpairmentOfLongLivedAssetsHeldForUse_752" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:label="Locator_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_753"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DeferredIncomeTaxesAndTaxCredits" xlink:label="Locator_us-gaap_DeferredIncomeTaxesAndTaxCredits_754"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_753" xlink:to="Locator_us-gaap_DeferredIncomeTaxesAndTaxCredits_754" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:label="Locator_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_755"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_UnrealizedGainLossOnDerivatives" xlink:label="Locator_us-gaap_UnrealizedGainLossOnDerivatives_756"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_755" xlink:to="Locator_us-gaap_UnrealizedGainLossOnDerivatives_756" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:label="Locator_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_757"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_GainLossOnInvestments" xlink:label="Locator_us-gaap_GainLossOnInvestments_758"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_757" xlink:to="Locator_us-gaap_GainLossOnInvestments_758" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:label="Locator_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_759"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherNoncashIncomeExpense" xlink:label="Locator_us-gaap_OtherNoncashIncomeExpense_760"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_759" xlink:to="Locator_us-gaap_OtherNoncashIncomeExpense_760" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract" xlink:label="Locator_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_761"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_IncreaseDecreaseInOperatingCapitalAbstract" xlink:label="Locator_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_762"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_761" xlink:to="Locator_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_762" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_IncreaseDecreaseInOperatingCapitalAbstract" xlink:label="Locator_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_763"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_IncreaseDecreaseInReceivables" xlink:label="Locator_us-gaap_IncreaseDecreaseInReceivables_764"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_763" xlink:to="Locator_us-gaap_IncreaseDecreaseInReceivables_764" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_IncreaseDecreaseInOperatingCapitalAbstract" xlink:label="Locator_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_765"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ChangeReceivablesPayablesFromAffiliates" xlink:label="Locator_exc_ChangeReceivablesPayablesFromAffiliates_766"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_765" xlink:to="Locator_exc_ChangeReceivablesPayablesFromAffiliates_766" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_IncreaseDecreaseInOperatingCapitalAbstract" xlink:label="Locator_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_767"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_IncreaseDecreaseInInventories" xlink:label="Locator_us-gaap_IncreaseDecreaseInInventories_768"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_767" xlink:to="Locator_us-gaap_IncreaseDecreaseInInventories_768" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_IncreaseDecreaseInOperatingCapitalAbstract" xlink:label="Locator_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_769"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities" xlink:label="Locator_us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities_770"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_769" xlink:to="Locator_us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities_770" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_IncreaseDecreaseInOperatingCapitalAbstract" xlink:label="Locator_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_771"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ChangesInOptionPremiumsCollectedReceived" xlink:label="Locator_exc_ChangesInOptionPremiumsCollectedReceived_772"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_771" xlink:to="Locator_exc_ChangesInOptionPremiumsCollectedReceived_772" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_IncreaseDecreaseInOperatingCapitalAbstract" xlink:label="Locator_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_773"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_IncreaseDecreaseInCounterpartyCollateralNet" xlink:label="Locator_exc_IncreaseDecreaseInCounterpartyCollateralNet_774"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_773" xlink:to="Locator_exc_IncreaseDecreaseInCounterpartyCollateralNet_774" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_IncreaseDecreaseInOperatingCapitalAbstract" xlink:label="Locator_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_775"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_IncreaseDecreaseInAccruedIncomeTaxesPayable" xlink:label="Locator_us-gaap_IncreaseDecreaseInAccruedIncomeTaxesPayable_776"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_775" xlink:to="Locator_us-gaap_IncreaseDecreaseInAccruedIncomeTaxesPayable_776" order="7.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_IncreaseDecreaseInOperatingCapitalAbstract" xlink:label="Locator_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_777"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PensionAndOtherPostretirementBenefitContributions" xlink:label="Locator_us-gaap_PensionAndOtherPostretirementBenefitContributions_778"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_777" xlink:to="Locator_us-gaap_PensionAndOtherPostretirementBenefitContributions_778" order="8.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_IncreaseDecreaseInOperatingCapitalAbstract" xlink:label="Locator_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_779"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet" xlink:label="Locator_us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet_780"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_779" xlink:to="Locator_us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet_780" order="9.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract" xlink:label="Locator_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_781"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:label="Locator_us-gaap_NetCashProvidedByUsedInOperatingActivities_782"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_781" xlink:to="Locator_us-gaap_NetCashProvidedByUsedInOperatingActivities_782" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementLineItems" xlink:label="Locator_us-gaap_StatementLineItems_783"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract" xlink:label="Locator_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_784"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_StatementLineItems_783" xlink:to="Locator_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_784" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract" xlink:label="Locator_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_785"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PaymentsToAcquirePropertyPlantAndEquipment" xlink:label="Locator_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_786"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_785" xlink:to="Locator_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_786" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract" xlink:label="Locator_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_787"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ProceedsFromPaymentsForLongTermLoansForRelatedParties" xlink:label="Locator_us-gaap_ProceedsFromPaymentsForLongTermLoansForRelatedParties_788"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_787" xlink:to="Locator_us-gaap_ProceedsFromPaymentsForLongTermLoansForRelatedParties_788" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract" xlink:label="Locator_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_789"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ProceedsFromSaleAndMaturityOfOtherInvestments" xlink:label="Locator_us-gaap_ProceedsFromSaleAndMaturityOfOtherInvestments_790"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_789" xlink:to="Locator_us-gaap_ProceedsFromSaleAndMaturityOfOtherInvestments_790" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract" xlink:label="Locator_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_791"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PaymentsToAcquireOtherInvestments" xlink:label="Locator_us-gaap_PaymentsToAcquireOtherInvestments_792"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_791" xlink:to="Locator_us-gaap_PaymentsToAcquireOtherInvestments_792" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract" xlink:label="Locator_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_793"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CashAcquiredFromAcquisition" xlink:label="Locator_us-gaap_CashAcquiredFromAcquisition_794"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_793" xlink:to="Locator_us-gaap_CashAcquiredFromAcquisition_794" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract" xlink:label="Locator_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_795"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PaymentsToAcquireBusinessesGross" xlink:label="Locator_us-gaap_PaymentsToAcquireBusinessesGross_796"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_795" xlink:to="Locator_us-gaap_PaymentsToAcquireBusinessesGross_796" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract" xlink:label="Locator_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_797"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ProceedsFromGovernmentGrant" xlink:label="Locator_exc_ProceedsFromGovernmentGrant_798"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_797" xlink:to="Locator_exc_ProceedsFromGovernmentGrant_798" order="7.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract" xlink:label="Locator_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_799"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ProceedsFromSaleMaturityAndCollectionsOfInvestments" xlink:label="Locator_us-gaap_ProceedsFromSaleMaturityAndCollectionsOfInvestments_800"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_799" xlink:to="Locator_us-gaap_ProceedsFromSaleMaturityAndCollectionsOfInvestments_800" order="8.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract" xlink:label="Locator_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_801"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PaymentsToAcquireMarketableSecurities" xlink:label="Locator_us-gaap_PaymentsToAcquireMarketableSecurities_802"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_801" xlink:to="Locator_us-gaap_PaymentsToAcquireMarketableSecurities_802" order="9.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract" xlink:label="Locator_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_803"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_IncreaseDecreaseInRestrictedCash" xlink:label="Locator_us-gaap_IncreaseDecreaseInRestrictedCash_804"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_803" xlink:to="Locator_us-gaap_IncreaseDecreaseInRestrictedCash_804" order="10.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract" xlink:label="Locator_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_805"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PaymentsForProceedsFromOtherInvestingActivities" xlink:label="Locator_us-gaap_PaymentsForProceedsFromOtherInvestingActivities_806"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_805" xlink:to="Locator_us-gaap_PaymentsForProceedsFromOtherInvestingActivities_806" order="11.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract" xlink:label="Locator_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_807"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:label="Locator_us-gaap_NetCashProvidedByUsedInInvestingActivities_808"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_807" xlink:to="Locator_us-gaap_NetCashProvidedByUsedInInvestingActivities_808" order="12.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementLineItems" xlink:label="Locator_us-gaap_StatementLineItems_809"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract" xlink:label="Locator_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_810"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_StatementLineItems_809" xlink:to="Locator_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_810" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract" xlink:label="Locator_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_811"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ProceedsFromRepaymentsOfShortTermDebtMaturingInThreeMonthsOrLess" xlink:label="Locator_us-gaap_ProceedsFromRepaymentsOfShortTermDebtMaturingInThreeMonthsOrLess_812"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_811" xlink:to="Locator_us-gaap_ProceedsFromRepaymentsOfShortTermDebtMaturingInThreeMonthsOrLess_812" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract" xlink:label="Locator_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_813"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ProceedsFromIssuanceOfLongTermDebt" xlink:label="Locator_us-gaap_ProceedsFromIssuanceOfLongTermDebt_814"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_813" xlink:to="Locator_us-gaap_ProceedsFromIssuanceOfLongTermDebt_814" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract" xlink:label="Locator_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_815"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RepaymentsOfLongTermDebt" xlink:label="Locator_us-gaap_RepaymentsOfLongTermDebt_816"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_815" xlink:to="Locator_us-gaap_RepaymentsOfLongTermDebt_816" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract" xlink:label="Locator_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_817"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RepaymentsOfOtherLongTermDebt" xlink:label="Locator_us-gaap_RepaymentsOfOtherLongTermDebt_818"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_817" xlink:to="Locator_us-gaap_RepaymentsOfOtherLongTermDebt_818" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract" xlink:label="Locator_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_819"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RepaymentsOfRelatedPartyDebt" xlink:label="Locator_us-gaap_RepaymentsOfRelatedPartyDebt_820"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_819" xlink:to="Locator_us-gaap_RepaymentsOfRelatedPartyDebt_820" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract" xlink:label="Locator_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_821"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_IncreaseDecreaseInRestrictedCashForRetirementOfLongTermDebt" xlink:label="Locator_exc_IncreaseDecreaseInRestrictedCashForRetirementOfLongTermDebt_822"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_821" xlink:to="Locator_exc_IncreaseDecreaseInRestrictedCashForRetirementOfLongTermDebt_822" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract" xlink:label="Locator_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_823"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PaymentsOfDistributionsToAffiliates" xlink:label="Locator_us-gaap_PaymentsOfDistributionsToAffiliates_824"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_823" xlink:to="Locator_us-gaap_PaymentsOfDistributionsToAffiliates_824" order="7.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract" xlink:label="Locator_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_825"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ProceedsFromContributionsFromParent" xlink:label="Locator_us-gaap_ProceedsFromContributionsFromParent_826"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_825" xlink:to="Locator_us-gaap_ProceedsFromContributionsFromParent_826" order="8.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract" xlink:label="Locator_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_827"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PaymentsOfDividendsCommonStock" xlink:label="Locator_us-gaap_PaymentsOfDividendsCommonStock_828"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_827" xlink:to="Locator_us-gaap_PaymentsOfDividendsCommonStock_828" order="9.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract" xlink:label="Locator_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_829"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DividendsPaidToFormerAcquireeStockholders" xlink:label="Locator_exc_DividendsPaidToFormerAcquireeStockholders_830"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_829" xlink:to="Locator_exc_DividendsPaidToFormerAcquireeStockholders_830" order="10.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract" xlink:label="Locator_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_831"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ProceedsFromStockPlans" xlink:label="Locator_us-gaap_ProceedsFromStockPlans_832"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_831" xlink:to="Locator_us-gaap_ProceedsFromStockPlans_832" order="11.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract" xlink:label="Locator_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_833"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PaymentsOfDividendsPreferredStockAndPreferenceStock" xlink:label="Locator_us-gaap_PaymentsOfDividendsPreferredStockAndPreferenceStock_834"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_833" xlink:to="Locator_us-gaap_PaymentsOfDividendsPreferredStockAndPreferenceStock_834" order="12.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract" xlink:label="Locator_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_835"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RepaymentOfNotesReceivableFromRelatedParties" xlink:label="Locator_us-gaap_RepaymentOfNotesReceivableFromRelatedParties_836"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_835" xlink:to="Locator_us-gaap_RepaymentOfNotesReceivableFromRelatedParties_836" order="13.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract" xlink:label="Locator_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_837"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ProceedsFromContributionsFromAffiliates" xlink:label="Locator_us-gaap_ProceedsFromContributionsFromAffiliates_838"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_837" xlink:to="Locator_us-gaap_ProceedsFromContributionsFromAffiliates_838" order="14.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract" xlink:label="Locator_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_839"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PaymentsForRepurchaseOfCommonStock" xlink:label="Locator_us-gaap_PaymentsForRepurchaseOfCommonStock_840"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_839" xlink:to="Locator_us-gaap_PaymentsForRepurchaseOfCommonStock_840" order="15.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract" xlink:label="Locator_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_841"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PurchaseOfForwardContractInRelationToCertainTreasuryStock" xlink:label="Locator_exc_PurchaseOfForwardContractInRelationToCertainTreasuryStock_842"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_841" xlink:to="Locator_exc_PurchaseOfForwardContractInRelationToCertainTreasuryStock_842" order="16.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract" xlink:label="Locator_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_843"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ProceedsFromPaymentsForOtherFinancingActivities" xlink:label="Locator_us-gaap_ProceedsFromPaymentsForOtherFinancingActivities_844"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_843" xlink:to="Locator_us-gaap_ProceedsFromPaymentsForOtherFinancingActivities_844" order="17.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract" xlink:label="Locator_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_845"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:label="Locator_us-gaap_NetCashProvidedByUsedInFinancingActivities_846"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_845" xlink:to="Locator_us-gaap_NetCashProvidedByUsedInFinancingActivities_846" order="18.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementLineItems" xlink:label="Locator_us-gaap_StatementLineItems_847"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease" xlink:label="Locator_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_848"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_StatementLineItems_847" xlink:to="Locator_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_848" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementLineItems" xlink:label="Locator_us-gaap_StatementLineItems_849"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:label="Locator_us-gaap_CashAndCashEquivalentsAtCarryingValue_850"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_StatementLineItems_849" xlink:to="Locator_us-gaap_CashAndCashEquivalentsAtCarryingValue_850" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementLineItems" xlink:label="Locator_us-gaap_StatementLineItems_535"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementTable" xlink:label="Locator_us-gaap_StatementTable_536"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="Locator_us-gaap_StatementLineItems_535" xlink:to="Locator_us-gaap_StatementTable_536" order="0.5" xbrldt:contextElement="segment" xbrldt:closed="true"/> |
| | </definitionLink> |
| <definitionLink xlink:type="extended" xlink:role="http://exeloncorp.com/role/StatementConsolidatedBalanceSheetsUnaudited"> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_1275"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_1276"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_dei_LegalEntityAxis_1275" xlink:to="Locator_dei_EntityDomain_1276" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_1277"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ExelonGenerationCoLLCMember" xlink:label="Locator_exc_ExelonGenerationCoLLCMember_1278"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_1277" xlink:to="Locator_exc_ExelonGenerationCoLLCMember_1278" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_1279"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CommonwealthEdisonCoMember" xlink:label="Locator_exc_CommonwealthEdisonCoMember_1280"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_1279" xlink:to="Locator_exc_CommonwealthEdisonCoMember_1280" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_1281"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PecoEnergyCoMember" xlink:label="Locator_exc_PecoEnergyCoMember_1282"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_1281" xlink:to="Locator_exc_PecoEnergyCoMember_1282" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_1283"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BaltimoreGasAndElectricCompanyMember" xlink:label="Locator_exc_BaltimoreGasAndElectricCompanyMember_1284"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_1283" xlink:to="Locator_exc_BaltimoreGasAndElectricCompanyMember_1284" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementTable" xlink:label="Locator_us-gaap_StatementTable_1273"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RegulatoryLiabilityAxis" xlink:label="Locator_us-gaap_RegulatoryLiabilityAxis_1274"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_us-gaap_StatementTable_1273" xlink:to="Locator_us-gaap_RegulatoryLiabilityAxis_1274" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RegulatoryLiabilityAxis" xlink:label="Locator_us-gaap_RegulatoryLiabilityAxis_1285"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RegulatoryLiabilityDomain" xlink:label="Locator_us-gaap_RegulatoryLiabilityDomain_1286"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_us-gaap_RegulatoryLiabilityAxis_1285" xlink:to="Locator_us-gaap_RegulatoryLiabilityDomain_1286" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RegulatoryLiabilityDomain" xlink:label="Locator_us-gaap_RegulatoryLiabilityDomain_1287"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RemovalCostsMember" xlink:label="Locator_exc_RemovalCostsMember_1288"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RegulatoryLiabilityDomain_1287" xlink:to="Locator_exc_RemovalCostsMember_1288" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RegulatoryLiabilityDomain" xlink:label="Locator_us-gaap_RegulatoryLiabilityDomain_1289"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CustomerRateCreditMember" xlink:label="Locator_exc_CustomerRateCreditMember_1290"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RegulatoryLiabilityDomain_1289" xlink:to="Locator_exc_CustomerRateCreditMember_1290" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementTable" xlink:label="Locator_us-gaap_StatementTable_1271"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_1272"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_us-gaap_StatementTable_1271" xlink:to="Locator_dei_LegalEntityAxis_1272" order="0.0"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AccountsReceivableNetCurrentAbstract" xlink:label="Locator_us-gaap_AccountsReceivableNetCurrentAbstract_1307"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AccountsReceivableNetCurrent" xlink:label="Locator_us-gaap_AccountsReceivableNetCurrent_1308"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_AccountsReceivableNetCurrentAbstract_1307" xlink:to="Locator_us-gaap_AccountsReceivableNetCurrent_1308" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AccountsReceivableNetCurrentAbstract" xlink:label="Locator_us-gaap_AccountsReceivableNetCurrentAbstract_1309"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherReceivables" xlink:label="Locator_us-gaap_OtherReceivables_1310"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_AccountsReceivableNetCurrentAbstract_1309" xlink:to="Locator_us-gaap_OtherReceivables_1310" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementLineItems" xlink:label="Locator_us-gaap_StatementLineItems_1291"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AssetsAbstract" xlink:label="Locator_us-gaap_AssetsAbstract_1292"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_StatementLineItems_1291" xlink:to="Locator_us-gaap_AssetsAbstract_1292" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AssetsAbstract" xlink:label="Locator_us-gaap_AssetsAbstract_1293"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AssetsCurrentAbstract" xlink:label="Locator_us-gaap_AssetsCurrentAbstract_1294"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_AssetsAbstract_1293" xlink:to="Locator_us-gaap_AssetsCurrentAbstract_1294" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AssetsCurrentAbstract" xlink:label="Locator_us-gaap_AssetsCurrentAbstract_1295"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CashAndCashEquivalentsNonvariableInterestEntity" xlink:label="Locator_exc_CashAndCashEquivalentsNonvariableInterestEntity_1296"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_AssetsCurrentAbstract_1295" xlink:to="Locator_exc_CashAndCashEquivalentsNonvariableInterestEntity_1296" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AssetsCurrentAbstract" xlink:label="Locator_us-gaap_AssetsCurrentAbstract_1297"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CashAndCashEquivalentVariableInterestEntity" xlink:label="Locator_exc_CashAndCashEquivalentVariableInterestEntity_1298"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_AssetsCurrentAbstract_1297" xlink:to="Locator_exc_CashAndCashEquivalentVariableInterestEntity_1298" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AssetsCurrentAbstract" xlink:label="Locator_us-gaap_AssetsCurrentAbstract_1299"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RestrictedCashAndCashEquivalentsAtCarryingValue" xlink:label="Locator_us-gaap_RestrictedCashAndCashEquivalentsAtCarryingValue_1300"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_AssetsCurrentAbstract_1299" xlink:to="Locator_us-gaap_RestrictedCashAndCashEquivalentsAtCarryingValue_1300" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AssetsCurrentAbstract" xlink:label="Locator_us-gaap_AssetsCurrentAbstract_1301"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RestrictedCashAndInvestmentsCurrent" xlink:label="Locator_us-gaap_RestrictedCashAndInvestmentsCurrent_1302"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_AssetsCurrentAbstract_1301" xlink:to="Locator_us-gaap_RestrictedCashAndInvestmentsCurrent_1302" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AssetsCurrentAbstract" xlink:label="Locator_us-gaap_AssetsCurrentAbstract_1303"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RestrictedCashVariableInterestEntity" xlink:label="Locator_exc_RestrictedCashVariableInterestEntity_1304"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_AssetsCurrentAbstract_1303" xlink:to="Locator_exc_RestrictedCashVariableInterestEntity_1304" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AssetsCurrentAbstract" xlink:label="Locator_us-gaap_AssetsCurrentAbstract_1305"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AccountsReceivableNetCurrentAbstract" xlink:label="Locator_us-gaap_AccountsReceivableNetCurrentAbstract_1306"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_AssetsCurrentAbstract_1305" xlink:to="Locator_us-gaap_AccountsReceivableNetCurrentAbstract_1306" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AssetsCurrentAbstract" xlink:label="Locator_us-gaap_AssetsCurrentAbstract_1311"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AccountsReceivableOfVariableInterestEntities" xlink:label="Locator_exc_AccountsReceivableOfVariableInterestEntities_1312"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_AssetsCurrentAbstract_1311" xlink:to="Locator_exc_AccountsReceivableOfVariableInterestEntities_1312" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AssetsCurrentAbstract" xlink:label="Locator_us-gaap_AssetsCurrentAbstract_1313"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_IncomeTaxReceivable" xlink:label="Locator_us-gaap_IncomeTaxReceivable_1314"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_AssetsCurrentAbstract_1313" xlink:to="Locator_us-gaap_IncomeTaxReceivable_1314" order="7.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AssetsCurrentAbstract" xlink:label="Locator_us-gaap_AssetsCurrentAbstract_1315"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DerivativeAssetsCurrent" xlink:label="Locator_us-gaap_DerivativeAssetsCurrent_1316"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_AssetsCurrentAbstract_1315" xlink:to="Locator_us-gaap_DerivativeAssetsCurrent_1316" order="8.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AssetsCurrentAbstract" xlink:label="Locator_us-gaap_AssetsCurrentAbstract_1317"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AffiliateDerivativeAssetsCurrent" xlink:label="Locator_exc_AffiliateDerivativeAssetsCurrent_1318"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_AssetsCurrentAbstract_1317" xlink:to="Locator_exc_AffiliateDerivativeAssetsCurrent_1318" order="9.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AssetsCurrentAbstract" xlink:label="Locator_us-gaap_AssetsCurrentAbstract_1319"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DueFromAffiliateCurrent" xlink:label="Locator_us-gaap_DueFromAffiliateCurrent_1320"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_AssetsCurrentAbstract_1319" xlink:to="Locator_us-gaap_DueFromAffiliateCurrent_1320" order="10.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AssetsCurrentAbstract" xlink:label="Locator_us-gaap_AssetsCurrentAbstract_1321"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_UnamortizedEnergyContractAssetsCurrent" xlink:label="Locator_exc_UnamortizedEnergyContractAssetsCurrent_1322"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_AssetsCurrentAbstract_1321" xlink:to="Locator_exc_UnamortizedEnergyContractAssetsCurrent_1322" order="11.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AssetsCurrentAbstract" xlink:label="Locator_us-gaap_AssetsCurrentAbstract_1323"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_InventoryNetAbstract" xlink:label="Locator_us-gaap_InventoryNetAbstract_1324"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_AssetsCurrentAbstract_1323" xlink:to="Locator_us-gaap_InventoryNetAbstract_1324" order="12.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_InventoryNetAbstract" xlink:label="Locator_us-gaap_InventoryNetAbstract_1325"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_EnergyRelatedInventoryOtherFossilFuel" xlink:label="Locator_us-gaap_EnergyRelatedInventoryOtherFossilFuel_1326"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_InventoryNetAbstract_1325" xlink:to="Locator_us-gaap_EnergyRelatedInventoryOtherFossilFuel_1326" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_InventoryNetAbstract" xlink:label="Locator_us-gaap_InventoryNetAbstract_1327"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_InventoryRawMaterialsAndSupplies" xlink:label="Locator_us-gaap_InventoryRawMaterialsAndSupplies_1328"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_InventoryNetAbstract_1327" xlink:to="Locator_us-gaap_InventoryRawMaterialsAndSupplies_1328" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AssetsCurrentAbstract" xlink:label="Locator_us-gaap_AssetsCurrentAbstract_1329"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_InventoryNet" xlink:label="Locator_us-gaap_InventoryNet_1330"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_AssetsCurrentAbstract_1329" xlink:to="Locator_us-gaap_InventoryNet_1330" order="13.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AssetsCurrentAbstract" xlink:label="Locator_us-gaap_AssetsCurrentAbstract_1331"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DeferredTaxAssetsNetCurrent" xlink:label="Locator_us-gaap_DeferredTaxAssetsNetCurrent_1332"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_AssetsCurrentAbstract_1331" xlink:to="Locator_us-gaap_DeferredTaxAssetsNetCurrent_1332" order="14.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AssetsCurrentAbstract" xlink:label="Locator_us-gaap_AssetsCurrentAbstract_1333"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DueFromRelatedPartiesCurrent" xlink:label="Locator_us-gaap_DueFromRelatedPartiesCurrent_1334"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_AssetsCurrentAbstract_1333" xlink:to="Locator_us-gaap_DueFromRelatedPartiesCurrent_1334" order="15.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AssetsCurrentAbstract" xlink:label="Locator_us-gaap_AssetsCurrentAbstract_1335"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PrepaidTaxes" xlink:label="Locator_us-gaap_PrepaidTaxes_1336"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_AssetsCurrentAbstract_1335" xlink:to="Locator_us-gaap_PrepaidTaxes_1336" order="16.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AssetsCurrentAbstract" xlink:label="Locator_us-gaap_AssetsCurrentAbstract_1337"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DepositAssets" xlink:label="Locator_us-gaap_DepositAssets_1338"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_AssetsCurrentAbstract_1337" xlink:to="Locator_us-gaap_DepositAssets_1338" order="17.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AssetsCurrentAbstract" xlink:label="Locator_us-gaap_AssetsCurrentAbstract_1339"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RegulatoryAssetsCurrent" xlink:label="Locator_us-gaap_RegulatoryAssetsCurrent_1340"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_AssetsCurrentAbstract_1339" xlink:to="Locator_us-gaap_RegulatoryAssetsCurrent_1340" order="18.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AssetsCurrentAbstract" xlink:label="Locator_us-gaap_AssetsCurrentAbstract_1341"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherAssetsCurrent" xlink:label="Locator_us-gaap_OtherAssetsCurrent_1342"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_AssetsCurrentAbstract_1341" xlink:to="Locator_us-gaap_OtherAssetsCurrent_1342" order="19.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AssetsCurrentAbstract" xlink:label="Locator_us-gaap_AssetsCurrentAbstract_1343"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AssetsCurrent" xlink:label="Locator_us-gaap_AssetsCurrent_1344"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_AssetsCurrentAbstract_1343" xlink:to="Locator_us-gaap_AssetsCurrent_1344" order="20.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AssetsAbstract" xlink:label="Locator_us-gaap_AssetsAbstract_1345"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PropertyPlantAndEquipmentNet" xlink:label="Locator_us-gaap_PropertyPlantAndEquipmentNet_1346"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_AssetsAbstract_1345" xlink:to="Locator_us-gaap_PropertyPlantAndEquipmentNet_1346" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AssetsAbstract" xlink:label="Locator_us-gaap_AssetsAbstract_1347"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherAssetsNoncurrentAbstract" xlink:label="Locator_us-gaap_OtherAssetsNoncurrentAbstract_1348"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_AssetsAbstract_1347" xlink:to="Locator_us-gaap_OtherAssetsNoncurrentAbstract_1348" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherAssetsNoncurrentAbstract" xlink:label="Locator_us-gaap_OtherAssetsNoncurrentAbstract_1349"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RegulatoryAssetsNoncurrent" xlink:label="Locator_us-gaap_RegulatoryAssetsNoncurrent_1350"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_OtherAssetsNoncurrentAbstract_1349" xlink:to="Locator_us-gaap_RegulatoryAssetsNoncurrent_1350" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherAssetsNoncurrentAbstract" xlink:label="Locator_us-gaap_OtherAssetsNoncurrentAbstract_1351"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DecommissioningFundInvestments" xlink:label="Locator_us-gaap_DecommissioningFundInvestments_1352"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_OtherAssetsNoncurrentAbstract_1351" xlink:to="Locator_us-gaap_DecommissioningFundInvestments_1352" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherAssetsNoncurrentAbstract" xlink:label="Locator_us-gaap_OtherAssetsNoncurrentAbstract_1353"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LongTermInvestments" xlink:label="Locator_us-gaap_LongTermInvestments_1354"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_OtherAssetsNoncurrentAbstract_1353" xlink:to="Locator_us-gaap_LongTermInvestments_1354" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherAssetsNoncurrentAbstract" xlink:label="Locator_us-gaap_OtherAssetsNoncurrentAbstract_1355"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures" xlink:label="Locator_us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures_1356"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_OtherAssetsNoncurrentAbstract_1355" xlink:to="Locator_us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures_1356" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherAssetsNoncurrentAbstract" xlink:label="Locator_us-gaap_OtherAssetsNoncurrentAbstract_1357"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_InvestmentInCeng" xlink:label="Locator_exc_InvestmentInCeng_1358"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_OtherAssetsNoncurrentAbstract_1357" xlink:to="Locator_exc_InvestmentInCeng_1358" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherAssetsNoncurrentAbstract" xlink:label="Locator_us-gaap_OtherAssetsNoncurrentAbstract_1359"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_Goodwill" xlink:label="Locator_us-gaap_Goodwill_1360"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_OtherAssetsNoncurrentAbstract_1359" xlink:to="Locator_us-gaap_Goodwill_1360" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherAssetsNoncurrentAbstract" xlink:label="Locator_us-gaap_OtherAssetsNoncurrentAbstract_1361"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DueFromAffiliateNoncurrent" xlink:label="Locator_us-gaap_DueFromAffiliateNoncurrent_1362"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_OtherAssetsNoncurrentAbstract_1361" xlink:to="Locator_us-gaap_DueFromAffiliateNoncurrent_1362" order="7.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherAssetsNoncurrentAbstract" xlink:label="Locator_us-gaap_OtherAssetsNoncurrentAbstract_1363"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DerivativeAssetsNoncurrent" xlink:label="Locator_us-gaap_DerivativeAssetsNoncurrent_1364"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_OtherAssetsNoncurrentAbstract_1363" xlink:to="Locator_us-gaap_DerivativeAssetsNoncurrent_1364" order="8.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherAssetsNoncurrentAbstract" xlink:label="Locator_us-gaap_OtherAssetsNoncurrentAbstract_1365"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AffiliateDerivativeAssetsNoncurrent" xlink:label="Locator_exc_AffiliateDerivativeAssetsNoncurrent_1366"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_OtherAssetsNoncurrentAbstract_1365" xlink:to="Locator_exc_AffiliateDerivativeAssetsNoncurrent_1366" order="9.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherAssetsNoncurrentAbstract" xlink:label="Locator_us-gaap_OtherAssetsNoncurrentAbstract_1367"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PrepaidPensionCosts" xlink:label="Locator_us-gaap_PrepaidPensionCosts_1368"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_OtherAssetsNoncurrentAbstract_1367" xlink:to="Locator_us-gaap_PrepaidPensionCosts_1368" order="10.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherAssetsNoncurrentAbstract" xlink:label="Locator_us-gaap_OtherAssetsNoncurrentAbstract_1369"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AssetsHeldInTrustNoncurrent" xlink:label="Locator_us-gaap_AssetsHeldInTrustNoncurrent_1370"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_OtherAssetsNoncurrentAbstract_1369" xlink:to="Locator_us-gaap_AssetsHeldInTrustNoncurrent_1370" order="11.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherAssetsNoncurrentAbstract" xlink:label="Locator_us-gaap_OtherAssetsNoncurrentAbstract_1371"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_UnamortizedEnergyContractAssetsNoncurrent" xlink:label="Locator_exc_UnamortizedEnergyContractAssetsNoncurrent_1372"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_OtherAssetsNoncurrentAbstract_1371" xlink:to="Locator_exc_UnamortizedEnergyContractAssetsNoncurrent_1372" order="12.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherAssetsNoncurrentAbstract" xlink:label="Locator_us-gaap_OtherAssetsNoncurrentAbstract_1373"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherAssetsNoncurrent" xlink:label="Locator_us-gaap_OtherAssetsNoncurrent_1374"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_OtherAssetsNoncurrentAbstract_1373" xlink:to="Locator_us-gaap_OtherAssetsNoncurrent_1374" order="13.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherAssetsNoncurrentAbstract" xlink:label="Locator_us-gaap_OtherAssetsNoncurrentAbstract_1375"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_TotalDeferredDebitsAndOtherAssets" xlink:label="Locator_exc_TotalDeferredDebitsAndOtherAssets_1376"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_OtherAssetsNoncurrentAbstract_1375" xlink:to="Locator_exc_TotalDeferredDebitsAndOtherAssets_1376" order="14.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AssetsAbstract" xlink:label="Locator_us-gaap_AssetsAbstract_1377"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_Assets" xlink:label="Locator_us-gaap_Assets_1378"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_AssetsAbstract_1377" xlink:to="Locator_us-gaap_Assets_1378" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementLineItems" xlink:label="Locator_us-gaap_StatementLineItems_1379"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquityAbstract" xlink:label="Locator_us-gaap_LiabilitiesAndStockholdersEquityAbstract_1380"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_StatementLineItems_1379" xlink:to="Locator_us-gaap_LiabilitiesAndStockholdersEquityAbstract_1380" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquityAbstract" xlink:label="Locator_us-gaap_LiabilitiesAndStockholdersEquityAbstract_1381"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LiabilitiesCurrentAbstract" xlink:label="Locator_us-gaap_LiabilitiesCurrentAbstract_1382"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_LiabilitiesAndStockholdersEquityAbstract_1381" xlink:to="Locator_us-gaap_LiabilitiesCurrentAbstract_1382" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LiabilitiesCurrentAbstract" xlink:label="Locator_us-gaap_LiabilitiesCurrentAbstract_1383"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ShortTermBorrowings" xlink:label="Locator_us-gaap_ShortTermBorrowings_1384"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_LiabilitiesCurrentAbstract_1383" xlink:to="Locator_us-gaap_ShortTermBorrowings_1384" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LiabilitiesCurrentAbstract" xlink:label="Locator_us-gaap_LiabilitiesCurrentAbstract_1385"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherNotesPayableCurrent" xlink:label="Locator_us-gaap_OtherNotesPayableCurrent_1386"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_LiabilitiesCurrentAbstract_1385" xlink:to="Locator_us-gaap_OtherNotesPayableCurrent_1386" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LiabilitiesCurrentAbstract" xlink:label="Locator_us-gaap_LiabilitiesCurrentAbstract_1387"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent" xlink:label="Locator_us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent_1388"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_LiabilitiesCurrentAbstract_1387" xlink:to="Locator_us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent_1388" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LiabilitiesCurrentAbstract" xlink:label="Locator_us-gaap_LiabilitiesCurrentAbstract_1389"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LongtermTransitionBondCurrent" xlink:label="Locator_us-gaap_LongtermTransitionBondCurrent_1390"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_LiabilitiesCurrentAbstract_1389" xlink:to="Locator_us-gaap_LongtermTransitionBondCurrent_1390" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LiabilitiesCurrentAbstract" xlink:label="Locator_us-gaap_LiabilitiesCurrentAbstract_1391"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_LongTermDebtConsolidatedVariableInterestEntitiesCurrent" xlink:label="Locator_exc_LongTermDebtConsolidatedVariableInterestEntitiesCurrent_1392"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_LiabilitiesCurrentAbstract_1391" xlink:to="Locator_exc_LongTermDebtConsolidatedVariableInterestEntitiesCurrent_1392" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LiabilitiesCurrentAbstract" xlink:label="Locator_us-gaap_LiabilitiesCurrentAbstract_1393"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AccountsPayableCurrent" xlink:label="Locator_us-gaap_AccountsPayableCurrent_1394"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_LiabilitiesCurrentAbstract_1393" xlink:to="Locator_us-gaap_AccountsPayableCurrent_1394" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LiabilitiesCurrentAbstract" xlink:label="Locator_us-gaap_LiabilitiesCurrentAbstract_1395"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AccountsPayableVariableInterestEntities" xlink:label="Locator_exc_AccountsPayableVariableInterestEntities_1396"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_LiabilitiesCurrentAbstract_1395" xlink:to="Locator_exc_AccountsPayableVariableInterestEntities_1396" order="7.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LiabilitiesCurrentAbstract" xlink:label="Locator_us-gaap_LiabilitiesCurrentAbstract_1397"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AccruedLiabilitiesCurrent" xlink:label="Locator_us-gaap_AccruedLiabilitiesCurrent_1398"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_LiabilitiesCurrentAbstract_1397" xlink:to="Locator_us-gaap_AccruedLiabilitiesCurrent_1398" order="8.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LiabilitiesCurrentAbstract" xlink:label="Locator_us-gaap_LiabilitiesCurrentAbstract_1399"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DueToAffiliateCurrent" xlink:label="Locator_us-gaap_DueToAffiliateCurrent_1400"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_LiabilitiesCurrentAbstract_1399" xlink:to="Locator_us-gaap_DueToAffiliateCurrent_1400" order="9.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LiabilitiesCurrentAbstract" xlink:label="Locator_us-gaap_LiabilitiesCurrentAbstract_1401"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DeferredTaxLiabilitiesCurrent" xlink:label="Locator_us-gaap_DeferredTaxLiabilitiesCurrent_1402"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_LiabilitiesCurrentAbstract_1401" xlink:to="Locator_us-gaap_DeferredTaxLiabilitiesCurrent_1402" order="10.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LiabilitiesCurrentAbstract" xlink:label="Locator_us-gaap_LiabilitiesCurrentAbstract_1403"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CustomerDepositsCurrent" xlink:label="Locator_us-gaap_CustomerDepositsCurrent_1404"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_LiabilitiesCurrentAbstract_1403" xlink:to="Locator_us-gaap_CustomerDepositsCurrent_1404" order="11.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LiabilitiesCurrentAbstract" xlink:label="Locator_us-gaap_LiabilitiesCurrentAbstract_1405"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RegulatoryLiabilityCurrent" xlink:label="Locator_us-gaap_RegulatoryLiabilityCurrent_1406"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_LiabilitiesCurrentAbstract_1405" xlink:to="Locator_us-gaap_RegulatoryLiabilityCurrent_1406" order="12.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LiabilitiesCurrentAbstract" xlink:label="Locator_us-gaap_LiabilitiesCurrentAbstract_1407"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DividendsPayableCurrent" xlink:label="Locator_us-gaap_DividendsPayableCurrent_1408"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_LiabilitiesCurrentAbstract_1407" xlink:to="Locator_us-gaap_DividendsPayableCurrent_1408" order="13.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LiabilitiesCurrentAbstract" xlink:label="Locator_us-gaap_LiabilitiesCurrentAbstract_1409"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DerivativeLiabilitiesCurrent" xlink:label="Locator_us-gaap_DerivativeLiabilitiesCurrent_1410"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_LiabilitiesCurrentAbstract_1409" xlink:to="Locator_us-gaap_DerivativeLiabilitiesCurrent_1410" order="14.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LiabilitiesCurrentAbstract" xlink:label="Locator_us-gaap_LiabilitiesCurrentAbstract_1411"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AffiliateDerivativeLiabilitiesCurrent" xlink:label="Locator_exc_AffiliateDerivativeLiabilitiesCurrent_1412"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_LiabilitiesCurrentAbstract_1411" xlink:to="Locator_exc_AffiliateDerivativeLiabilitiesCurrent_1412" order="15.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LiabilitiesCurrentAbstract" xlink:label="Locator_us-gaap_LiabilitiesCurrentAbstract_1413"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_UnamortizedEnergyContractLiabilitiesCurrent" xlink:label="Locator_exc_UnamortizedEnergyContractLiabilitiesCurrent_1414"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_LiabilitiesCurrentAbstract_1413" xlink:to="Locator_exc_UnamortizedEnergyContractLiabilitiesCurrent_1414" order="16.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LiabilitiesCurrentAbstract" xlink:label="Locator_us-gaap_LiabilitiesCurrentAbstract_1415"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherLiabilitiesCurrent" xlink:label="Locator_us-gaap_OtherLiabilitiesCurrent_1416"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_LiabilitiesCurrentAbstract_1415" xlink:to="Locator_us-gaap_OtherLiabilitiesCurrent_1416" order="17.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LiabilitiesCurrentAbstract" xlink:label="Locator_us-gaap_LiabilitiesCurrentAbstract_1417"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LiabilitiesCurrent" xlink:label="Locator_us-gaap_LiabilitiesCurrent_1418"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_LiabilitiesCurrentAbstract_1417" xlink:to="Locator_us-gaap_LiabilitiesCurrent_1418" order="18.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquityAbstract" xlink:label="Locator_us-gaap_LiabilitiesAndStockholdersEquityAbstract_1419"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LongTermDebtNoncurrent" xlink:label="Locator_us-gaap_LongTermDebtNoncurrent_1420"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_LiabilitiesAndStockholdersEquityAbstract_1419" xlink:to="Locator_us-gaap_LongTermDebtNoncurrent_1420" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquityAbstract" xlink:label="Locator_us-gaap_LiabilitiesAndStockholdersEquityAbstract_1421"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DueToRelatedPartiesNoncurrent" xlink:label="Locator_us-gaap_DueToRelatedPartiesNoncurrent_1422"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_LiabilitiesAndStockholdersEquityAbstract_1421" xlink:to="Locator_us-gaap_DueToRelatedPartiesNoncurrent_1422" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquityAbstract" xlink:label="Locator_us-gaap_LiabilitiesAndStockholdersEquityAbstract_1423"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_LongTermDebtConsolidatedVariableInterestEntitiesNoncurrent" xlink:label="Locator_exc_LongTermDebtConsolidatedVariableInterestEntitiesNoncurrent_1424"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_LiabilitiesAndStockholdersEquityAbstract_1423" xlink:to="Locator_exc_LongTermDebtConsolidatedVariableInterestEntitiesNoncurrent_1424" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquityAbstract" xlink:label="Locator_us-gaap_LiabilitiesAndStockholdersEquityAbstract_1425"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherLiabilitiesNoncurrentAbstract" xlink:label="Locator_us-gaap_OtherLiabilitiesNoncurrentAbstract_1426"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_LiabilitiesAndStockholdersEquityAbstract_1425" xlink:to="Locator_us-gaap_OtherLiabilitiesNoncurrentAbstract_1426" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherLiabilitiesNoncurrentAbstract" xlink:label="Locator_us-gaap_OtherLiabilitiesNoncurrentAbstract_1427"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DeferredIncomeTaxesAndUnamortizedInvestmentTaxCredits" xlink:label="Locator_exc_DeferredIncomeTaxesAndUnamortizedInvestmentTaxCredits_1428"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_OtherLiabilitiesNoncurrentAbstract_1427" xlink:to="Locator_exc_DeferredIncomeTaxesAndUnamortizedInvestmentTaxCredits_1428" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherLiabilitiesNoncurrentAbstract" xlink:label="Locator_us-gaap_OtherLiabilitiesNoncurrentAbstract_1429"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AssetRetirementObligationsNoncurrent" xlink:label="Locator_us-gaap_AssetRetirementObligationsNoncurrent_1430"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_OtherLiabilitiesNoncurrentAbstract_1429" xlink:to="Locator_us-gaap_AssetRetirementObligationsNoncurrent_1430" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherLiabilitiesNoncurrentAbstract" xlink:label="Locator_us-gaap_OtherLiabilitiesNoncurrentAbstract_1431"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPensionPlanLiabilitiesNoncurrent" xlink:label="Locator_us-gaap_DefinedBenefitPensionPlanLiabilitiesNoncurrent_1432"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_OtherLiabilitiesNoncurrentAbstract_1431" xlink:to="Locator_us-gaap_DefinedBenefitPensionPlanLiabilitiesNoncurrent_1432" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherLiabilitiesNoncurrentAbstract" xlink:label="Locator_us-gaap_OtherLiabilitiesNoncurrentAbstract_1433"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherPostretirementDefinedBenefitPlanLiabilitiesNoncurrent" xlink:label="Locator_us-gaap_OtherPostretirementDefinedBenefitPlanLiabilitiesNoncurrent_1434"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_OtherLiabilitiesNoncurrentAbstract_1433" xlink:to="Locator_us-gaap_OtherPostretirementDefinedBenefitPlanLiabilitiesNoncurrent_1434" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherLiabilitiesNoncurrentAbstract" xlink:label="Locator_us-gaap_OtherLiabilitiesNoncurrentAbstract_1435"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_SpentNuclearFuelObligationNoncurrent" xlink:label="Locator_us-gaap_SpentNuclearFuelObligationNoncurrent_1436"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_OtherLiabilitiesNoncurrentAbstract_1435" xlink:to="Locator_us-gaap_SpentNuclearFuelObligationNoncurrent_1436" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherLiabilitiesNoncurrentAbstract" xlink:label="Locator_us-gaap_OtherLiabilitiesNoncurrentAbstract_1437"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DueToAffiliateNoncurrent" xlink:label="Locator_us-gaap_DueToAffiliateNoncurrent_1438"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_OtherLiabilitiesNoncurrentAbstract_1437" xlink:to="Locator_us-gaap_DueToAffiliateNoncurrent_1438" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherLiabilitiesNoncurrentAbstract" xlink:label="Locator_us-gaap_OtherLiabilitiesNoncurrentAbstract_1439"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RegulatoryLiabilityNoncurrent" xlink:label="Locator_us-gaap_RegulatoryLiabilityNoncurrent_1440"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_OtherLiabilitiesNoncurrentAbstract_1439" xlink:to="Locator_us-gaap_RegulatoryLiabilityNoncurrent_1440" order="7.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherLiabilitiesNoncurrentAbstract" xlink:label="Locator_us-gaap_OtherLiabilitiesNoncurrentAbstract_1441"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DerivativeLiabilitiesNoncurrent" xlink:label="Locator_us-gaap_DerivativeLiabilitiesNoncurrent_1442"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_OtherLiabilitiesNoncurrentAbstract_1441" xlink:to="Locator_us-gaap_DerivativeLiabilitiesNoncurrent_1442" order="8.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherLiabilitiesNoncurrentAbstract" xlink:label="Locator_us-gaap_OtherLiabilitiesNoncurrentAbstract_1443"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AffiliateDerivativeLiabilitiesNoncurrent" xlink:label="Locator_exc_AffiliateDerivativeLiabilitiesNoncurrent_1444"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_OtherLiabilitiesNoncurrentAbstract_1443" xlink:to="Locator_exc_AffiliateDerivativeLiabilitiesNoncurrent_1444" order="9.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherLiabilitiesNoncurrentAbstract" xlink:label="Locator_us-gaap_OtherLiabilitiesNoncurrentAbstract_1445"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_UnamortizedEnergyContractLiabilitiesNoncurrent" xlink:label="Locator_exc_UnamortizedEnergyContractLiabilitiesNoncurrent_1446"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_OtherLiabilitiesNoncurrentAbstract_1445" xlink:to="Locator_exc_UnamortizedEnergyContractLiabilitiesNoncurrent_1446" order="10.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherLiabilitiesNoncurrentAbstract" xlink:label="Locator_us-gaap_OtherLiabilitiesNoncurrentAbstract_1447"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PayableToZionsolutions" xlink:label="Locator_exc_PayableToZionsolutions_1448"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_OtherLiabilitiesNoncurrentAbstract_1447" xlink:to="Locator_exc_PayableToZionsolutions_1448" order="11.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherLiabilitiesNoncurrentAbstract" xlink:label="Locator_us-gaap_OtherLiabilitiesNoncurrentAbstract_1449"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherLiabilitiesNoncurrent" xlink:label="Locator_us-gaap_OtherLiabilitiesNoncurrent_1450"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_OtherLiabilitiesNoncurrentAbstract_1449" xlink:to="Locator_us-gaap_OtherLiabilitiesNoncurrent_1450" order="12.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherLiabilitiesNoncurrentAbstract" xlink:label="Locator_us-gaap_OtherLiabilitiesNoncurrentAbstract_1451"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_TotalDeferredCreditsAndOtherLiabilities" xlink:label="Locator_exc_TotalDeferredCreditsAndOtherLiabilities_1452"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_OtherLiabilitiesNoncurrentAbstract_1451" xlink:to="Locator_exc_TotalDeferredCreditsAndOtherLiabilities_1452" order="13.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquityAbstract" xlink:label="Locator_us-gaap_LiabilitiesAndStockholdersEquityAbstract_1453"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_Liabilities" xlink:label="Locator_us-gaap_Liabilities_1454"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_LiabilitiesAndStockholdersEquityAbstract_1453" xlink:to="Locator_us-gaap_Liabilities_1454" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquityAbstract" xlink:label="Locator_us-gaap_LiabilitiesAndStockholdersEquityAbstract_1455"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CommitmentsAndContingencies" xlink:label="Locator_us-gaap_CommitmentsAndContingencies_1456"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_LiabilitiesAndStockholdersEquityAbstract_1455" xlink:to="Locator_us-gaap_CommitmentsAndContingencies_1456" order="7.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquityAbstract" xlink:label="Locator_us-gaap_LiabilitiesAndStockholdersEquityAbstract_1457"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_TemporaryEquityCarryingAmount" xlink:label="Locator_us-gaap_TemporaryEquityCarryingAmount_1458"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_LiabilitiesAndStockholdersEquityAbstract_1457" xlink:to="Locator_us-gaap_TemporaryEquityCarryingAmount_1458" order="8.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquityAbstract" xlink:label="Locator_us-gaap_LiabilitiesAndStockholdersEquityAbstract_1459"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StockholdersEquityAbstract" xlink:label="Locator_us-gaap_StockholdersEquityAbstract_1460"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_LiabilitiesAndStockholdersEquityAbstract_1459" xlink:to="Locator_us-gaap_StockholdersEquityAbstract_1460" order="9.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StockholdersEquityAbstract" xlink:label="Locator_us-gaap_StockholdersEquityAbstract_1461"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CommonStockValue" xlink:label="Locator_us-gaap_CommonStockValue_1462"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_StockholdersEquityAbstract_1461" xlink:to="Locator_us-gaap_CommonStockValue_1462" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StockholdersEquityAbstract" xlink:label="Locator_us-gaap_StockholdersEquityAbstract_1463"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AdditionalPaidInCapital" xlink:label="Locator_us-gaap_AdditionalPaidInCapital_1464"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_StockholdersEquityAbstract_1463" xlink:to="Locator_us-gaap_AdditionalPaidInCapital_1464" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StockholdersEquityAbstract" xlink:label="Locator_us-gaap_StockholdersEquityAbstract_1465"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DueFromOfficersOrStockholdersNoncurrent" xlink:label="Locator_us-gaap_DueFromOfficersOrStockholdersNoncurrent_1466"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_StockholdersEquityAbstract_1465" xlink:to="Locator_us-gaap_DueFromOfficersOrStockholdersNoncurrent_1466" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StockholdersEquityAbstract" xlink:label="Locator_us-gaap_StockholdersEquityAbstract_1467"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_TreasuryStockValue" xlink:label="Locator_us-gaap_TreasuryStockValue_1468"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_StockholdersEquityAbstract_1467" xlink:to="Locator_us-gaap_TreasuryStockValue_1468" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StockholdersEquityAbstract" xlink:label="Locator_us-gaap_StockholdersEquityAbstract_1469"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RetainedEarningsAccumulatedDeficit" xlink:label="Locator_us-gaap_RetainedEarningsAccumulatedDeficit_1470"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_StockholdersEquityAbstract_1469" xlink:to="Locator_us-gaap_RetainedEarningsAccumulatedDeficit_1470" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StockholdersEquityAbstract" xlink:label="Locator_us-gaap_StockholdersEquityAbstract_1471"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax" xlink:label="Locator_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_1472"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_StockholdersEquityAbstract_1471" xlink:to="Locator_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_1472" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StockholdersEquityAbstract" xlink:label="Locator_us-gaap_StockholdersEquityAbstract_1473"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StockholdersEquity" xlink:label="Locator_us-gaap_StockholdersEquity_1474"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_StockholdersEquityAbstract_1473" xlink:to="Locator_us-gaap_StockholdersEquity_1474" order="7.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StockholdersEquityAbstract" xlink:label="Locator_us-gaap_StockholdersEquityAbstract_1475"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PreferredStockValue" xlink:label="Locator_us-gaap_PreferredStockValue_1476"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_StockholdersEquityAbstract_1475" xlink:to="Locator_us-gaap_PreferredStockValue_1476" order="8.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StockholdersEquityAbstract" xlink:label="Locator_us-gaap_StockholdersEquityAbstract_1477"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_MinorityInterest" xlink:label="Locator_us-gaap_MinorityInterest_1478"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_StockholdersEquityAbstract_1477" xlink:to="Locator_us-gaap_MinorityInterest_1478" order="9.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StockholdersEquityAbstract" xlink:label="Locator_us-gaap_StockholdersEquityAbstract_1479"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest" xlink:label="Locator_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_1480"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_StockholdersEquityAbstract_1479" xlink:to="Locator_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_1480" order="10.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquityAbstract" xlink:label="Locator_us-gaap_LiabilitiesAndStockholdersEquityAbstract_1481"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquity" xlink:label="Locator_us-gaap_LiabilitiesAndStockholdersEquity_1482"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_LiabilitiesAndStockholdersEquityAbstract_1481" xlink:to="Locator_us-gaap_LiabilitiesAndStockholdersEquity_1482" order="10.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquityAbstract" xlink:label="Locator_us-gaap_LiabilitiesAndStockholdersEquityAbstract_1483"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_LiabilitiesAndStockholdersEquityIncludingPortionAttributableToNoncontrollingInterest" xlink:label="Locator_exc_LiabilitiesAndStockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_1484"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_LiabilitiesAndStockholdersEquityAbstract_1483" xlink:to="Locator_exc_LiabilitiesAndStockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_1484" order="11.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquityAbstract" xlink:label="Locator_us-gaap_LiabilitiesAndStockholdersEquityAbstract_1485"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_MembersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract" xlink:label="Locator_exc_MembersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract_1486"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_LiabilitiesAndStockholdersEquityAbstract_1485" xlink:to="Locator_exc_MembersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract_1486" order="12.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_MembersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract" xlink:label="Locator_exc_MembersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract_1487"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_MembersEquityAbstract" xlink:label="Locator_exc_MembersEquityAbstract_1488"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_MembersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract_1487" xlink:to="Locator_exc_MembersEquityAbstract_1488" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_MembersEquityAbstract" xlink:label="Locator_exc_MembersEquityAbstract_1489"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_MembershipInterests" xlink:label="Locator_exc_MembershipInterests_1490"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_MembersEquityAbstract_1489" xlink:to="Locator_exc_MembershipInterests_1490" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_MembersEquityAbstract" xlink:label="Locator_exc_MembersEquityAbstract_1491"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_MembersEquityRetainedEarnings" xlink:label="Locator_exc_MembersEquityRetainedEarnings_1492"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_MembersEquityAbstract_1491" xlink:to="Locator_exc_MembersEquityRetainedEarnings_1492" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_MembersEquityAbstract" xlink:label="Locator_exc_MembersEquityAbstract_1493"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_MembersEquity" xlink:label="Locator_exc_MembersEquity_1494"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_MembersEquityAbstract_1493" xlink:to="Locator_exc_MembersEquity_1494" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_MembersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract" xlink:label="Locator_exc_MembersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract_1495"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_MembersEquityIncludingPortionAttributableToNoncontrollingInterest" xlink:label="Locator_exc_MembersEquityIncludingPortionAttributableToNoncontrollingInterest_1496"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_MembersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract_1495" xlink:to="Locator_exc_MembersEquityIncludingPortionAttributableToNoncontrollingInterest_1496" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquityAbstract" xlink:label="Locator_us-gaap_LiabilitiesAndStockholdersEquityAbstract_1497"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_LiabilitiesAndMembersEquity" xlink:label="Locator_exc_LiabilitiesAndMembersEquity_1498"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_LiabilitiesAndStockholdersEquityAbstract_1497" xlink:to="Locator_exc_LiabilitiesAndMembersEquity_1498" order="13.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementLineItems" xlink:label="Locator_us-gaap_StatementLineItems_911"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementTable" xlink:label="Locator_us-gaap_StatementTable_912"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="Locator_us-gaap_StatementLineItems_911" xlink:to="Locator_us-gaap_StatementTable_912" order="0.5" xbrldt:contextElement="segment" xbrldt:closed="true"/> |
| | </definitionLink> |
| <definitionLink xlink:type="extended" xlink:role="http://exeloncorp.com/role/StatementConsolidatedBalanceSheetsUnauditedParenthetical"> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_1545"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_1546"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_dei_LegalEntityAxis_1545" xlink:to="Locator_dei_EntityDomain_1546" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_1547"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ExelonGenerationCoLLCMember" xlink:label="Locator_exc_ExelonGenerationCoLLCMember_1548"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_1547" xlink:to="Locator_exc_ExelonGenerationCoLLCMember_1548" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_1549"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CommonwealthEdisonCoMember" xlink:label="Locator_exc_CommonwealthEdisonCoMember_1550"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_1549" xlink:to="Locator_exc_CommonwealthEdisonCoMember_1550" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_1551"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PecoEnergyCoMember" xlink:label="Locator_exc_PecoEnergyCoMember_1552"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_1551" xlink:to="Locator_exc_PecoEnergyCoMember_1552" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_1553"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BaltimoreGasAndElectricCompanyMember" xlink:label="Locator_exc_BaltimoreGasAndElectricCompanyMember_1554"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_1553" xlink:to="Locator_exc_BaltimoreGasAndElectricCompanyMember_1554" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementTable" xlink:label="Locator_us-gaap_StatementTable_1543"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_1544"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_us-gaap_StatementTable_1543" xlink:to="Locator_dei_LegalEntityAxis_1544" order="0.0"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AccountsReceivableNetCurrentAbstract" xlink:label="Locator_us-gaap_AccountsReceivableNetCurrentAbstract_1557"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PledgedAssetsNotSeparatelyReportedFinanceReceivables" xlink:label="Locator_us-gaap_PledgedAssetsNotSeparatelyReportedFinanceReceivables_1558"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_AccountsReceivableNetCurrentAbstract_1557" xlink:to="Locator_us-gaap_PledgedAssetsNotSeparatelyReportedFinanceReceivables_1558" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StockholdersEquityAbstract" xlink:label="Locator_us-gaap_StockholdersEquityAbstract_1565"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CommonStockNoParValue" xlink:label="Locator_us-gaap_CommonStockNoParValue_1566"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_StockholdersEquityAbstract_1565" xlink:to="Locator_us-gaap_CommonStockNoParValue_1566" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StockholdersEquityAbstract" xlink:label="Locator_us-gaap_StockholdersEquityAbstract_1567"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CommonStockSharesAuthorized" xlink:label="Locator_us-gaap_CommonStockSharesAuthorized_1568"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_StockholdersEquityAbstract_1567" xlink:to="Locator_us-gaap_CommonStockSharesAuthorized_1568" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StockholdersEquityAbstract" xlink:label="Locator_us-gaap_StockholdersEquityAbstract_1569"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CommonStockSharesOutstanding" xlink:label="Locator_us-gaap_CommonStockSharesOutstanding_1570"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_StockholdersEquityAbstract_1569" xlink:to="Locator_us-gaap_CommonStockSharesOutstanding_1570" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StockholdersEquityAbstract" xlink:label="Locator_us-gaap_StockholdersEquityAbstract_1571"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_TreasuryStockShares" xlink:label="Locator_us-gaap_TreasuryStockShares_1572"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_StockholdersEquityAbstract_1571" xlink:to="Locator_us-gaap_TreasuryStockShares_1572" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementLineItems" xlink:label="Locator_us-gaap_StatementLineItems_1555"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AccountsReceivableNetCurrentAbstract" xlink:label="Locator_us-gaap_AccountsReceivableNetCurrentAbstract_1556"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_StatementLineItems_1555" xlink:to="Locator_us-gaap_AccountsReceivableNetCurrentAbstract_1556" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementLineItems" xlink:label="Locator_us-gaap_StatementLineItems_1559"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_UnamortizedEnergyContractsAssetsAbstract" xlink:label="Locator_exc_UnamortizedEnergyContractsAssetsAbstract_1560"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_StatementLineItems_1559" xlink:to="Locator_exc_UnamortizedEnergyContractsAssetsAbstract_1560" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_UnamortizedEnergyContractsAssetsAbstract" xlink:label="Locator_exc_UnamortizedEnergyContractsAssetsAbstract_1561"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_UnamortizedEnergyContractAssetsRelatedToNuclearJointVentureCurrent" xlink:label="Locator_exc_UnamortizedEnergyContractAssetsRelatedToNuclearJointVentureCurrent_1562"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_UnamortizedEnergyContractsAssetsAbstract_1561" xlink:to="Locator_exc_UnamortizedEnergyContractAssetsRelatedToNuclearJointVentureCurrent_1562" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementLineItems" xlink:label="Locator_us-gaap_StatementLineItems_1563"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StockholdersEquityAbstract" xlink:label="Locator_us-gaap_StockholdersEquityAbstract_1564"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_StatementLineItems_1563" xlink:to="Locator_us-gaap_StockholdersEquityAbstract_1564" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementLineItems" xlink:label="Locator_us-gaap_StatementLineItems_1537"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementTable" xlink:label="Locator_us-gaap_StatementTable_1538"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="Locator_us-gaap_StatementLineItems_1537" xlink:to="Locator_us-gaap_StatementTable_1538" order="0.5" xbrldt:contextElement="segment" xbrldt:closed="true"/> |
| | </definitionLink> |
| <definitionLink xlink:type="extended" xlink:role="http://exeloncorp.com/role/StatementConsolidatedStatementOfChangesInShareholdersEquityUnaudited"> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_1663"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_1664"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_dei_LegalEntityAxis_1663" xlink:to="Locator_dei_EntityDomain_1664" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_1665"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ExelonGenerationCoLLCMember" xlink:label="Locator_exc_ExelonGenerationCoLLCMember_1666"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_1665" xlink:to="Locator_exc_ExelonGenerationCoLLCMember_1666" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_1669"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CommonwealthEdisonCoMember" xlink:label="Locator_exc_CommonwealthEdisonCoMember_1670"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_1669" xlink:to="Locator_exc_CommonwealthEdisonCoMember_1670" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_1667"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PecoEnergyCoMember" xlink:label="Locator_exc_PecoEnergyCoMember_1668"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_1667" xlink:to="Locator_exc_PecoEnergyCoMember_1668" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_1671"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BaltimoreGasAndElectricCompanyMember" xlink:label="Locator_exc_BaltimoreGasAndElectricCompanyMember_1672"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_1671" xlink:to="Locator_exc_BaltimoreGasAndElectricCompanyMember_1672" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementTable" xlink:label="Locator_us-gaap_StatementTable_1661"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementEquityComponentsAxis" xlink:label="Locator_us-gaap_StatementEquityComponentsAxis_1662"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_us-gaap_StatementTable_1661" xlink:to="Locator_us-gaap_StatementEquityComponentsAxis_1662" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementEquityComponentsAxis" xlink:label="Locator_us-gaap_StatementEquityComponentsAxis_1587"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="Locator_us-gaap_EquityComponentDomain_1588"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="Locator_us-gaap_StatementEquityComponentsAxis_1587" xlink:to="Locator_us-gaap_EquityComponentDomain_1588" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementEquityComponentsAxis" xlink:label="Locator_us-gaap_StatementEquityComponentsAxis_1673"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="Locator_us-gaap_EquityComponentDomain_1674"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_us-gaap_StatementEquityComponentsAxis_1673" xlink:to="Locator_us-gaap_EquityComponentDomain_1674" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="Locator_us-gaap_EquityComponentDomain_1675"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_UndistributedEarningsMember" xlink:label="Locator_exc_UndistributedEarningsMember_1676"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_EquityComponentDomain_1675" xlink:to="Locator_exc_UndistributedEarningsMember_1676" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="Locator_us-gaap_EquityComponentDomain_1677"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CommonStockMember" xlink:label="Locator_us-gaap_CommonStockMember_1678"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_EquityComponentDomain_1677" xlink:to="Locator_us-gaap_CommonStockMember_1678" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="Locator_us-gaap_EquityComponentDomain_1679"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NonredeemablePreferredStockMember" xlink:label="Locator_us-gaap_NonredeemablePreferredStockMember_1680"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_EquityComponentDomain_1679" xlink:to="Locator_us-gaap_NonredeemablePreferredStockMember_1680" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="Locator_us-gaap_EquityComponentDomain_1681"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_TreasuryStockMember" xlink:label="Locator_us-gaap_TreasuryStockMember_1682"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_EquityComponentDomain_1681" xlink:to="Locator_us-gaap_TreasuryStockMember_1682" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="Locator_us-gaap_EquityComponentDomain_1683"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_MembershipInterestMember" xlink:label="Locator_exc_MembershipInterestMember_1684"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_EquityComponentDomain_1683" xlink:to="Locator_exc_MembershipInterestMember_1684" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="Locator_us-gaap_EquityComponentDomain_1685"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ReceivableFromParentMember" xlink:label="Locator_exc_ReceivableFromParentMember_1686"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_EquityComponentDomain_1685" xlink:to="Locator_exc_ReceivableFromParentMember_1686" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="Locator_us-gaap_EquityComponentDomain_1687"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RetainedEarningsMember" xlink:label="Locator_us-gaap_RetainedEarningsMember_1688"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_EquityComponentDomain_1687" xlink:to="Locator_us-gaap_RetainedEarningsMember_1688" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="Locator_us-gaap_EquityComponentDomain_1691"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NoncontrollingInterestMember" xlink:label="Locator_us-gaap_NoncontrollingInterestMember_1692"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_EquityComponentDomain_1691" xlink:to="Locator_us-gaap_NoncontrollingInterestMember_1692" order="8.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="Locator_us-gaap_EquityComponentDomain_1693"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PreferenceStockNotSubjectToMandatoryRedemptionMember" xlink:label="Locator_exc_PreferenceStockNotSubjectToMandatoryRedemptionMember_1694"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_EquityComponentDomain_1693" xlink:to="Locator_exc_PreferenceStockNotSubjectToMandatoryRedemptionMember_1694" order="9.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="Locator_us-gaap_EquityComponentDomain_1695"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherAdditionalCapitalMember" xlink:label="Locator_us-gaap_OtherAdditionalCapitalMember_1696"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_EquityComponentDomain_1695" xlink:to="Locator_us-gaap_OtherAdditionalCapitalMember_1696" order="10.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="Locator_us-gaap_EquityComponentDomain_1697"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RetainedEarningsUnappropriatedMember" xlink:label="Locator_us-gaap_RetainedEarningsUnappropriatedMember_1698"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_EquityComponentDomain_1697" xlink:to="Locator_us-gaap_RetainedEarningsUnappropriatedMember_1698" order="11.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="Locator_us-gaap_EquityComponentDomain_1699"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RetainedEarningsAppropriatedMember" xlink:label="Locator_us-gaap_RetainedEarningsAppropriatedMember_1700"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_EquityComponentDomain_1699" xlink:to="Locator_us-gaap_RetainedEarningsAppropriatedMember_1700" order="12.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="Locator_us-gaap_EquityComponentDomain_1689"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember" xlink:label="Locator_us-gaap_AccumulatedOtherComprehensiveIncomeMember_1690"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_EquityComponentDomain_1689" xlink:to="Locator_us-gaap_AccumulatedOtherComprehensiveIncomeMember_1690" order="7.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementTable" xlink:label="Locator_us-gaap_StatementTable_1659"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_1660"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_us-gaap_StatementTable_1659" xlink:to="Locator_dei_LegalEntityAxis_1660" order="0.0"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementLineItems" xlink:label="Locator_us-gaap_StatementLineItems_1701"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="Locator_us-gaap_NetIncomeLoss_1702"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_StatementLineItems_1701" xlink:to="Locator_us-gaap_NetIncomeLoss_1702" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementLineItems" xlink:label="Locator_us-gaap_StatementLineItems_1703"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic" xlink:label="Locator_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_1704"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_StatementLineItems_1703" xlink:to="Locator_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_1704" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementLineItems" xlink:label="Locator_us-gaap_StatementLineItems_1705"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_StockIssuedDuringPeriodSharesLongTermIncentivePlanActivity" xlink:label="Locator_exc_StockIssuedDuringPeriodSharesLongTermIncentivePlanActivity_1706"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_StatementLineItems_1705" xlink:to="Locator_exc_StockIssuedDuringPeriodSharesLongTermIncentivePlanActivity_1706" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementLineItems" xlink:label="Locator_us-gaap_StatementLineItems_1707"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans" xlink:label="Locator_us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans_1708"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_StatementLineItems_1707" xlink:to="Locator_us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans_1708" order="7.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementLineItems" xlink:label="Locator_us-gaap_StatementLineItems_1709"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AppropriationOfRetainedEarningsForFutureDividends" xlink:label="Locator_exc_AppropriationOfRetainedEarningsForFutureDividends_1710"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_StatementLineItems_1709" xlink:to="Locator_exc_AppropriationOfRetainedEarningsForFutureDividends_1710" order="8.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementLineItems" xlink:label="Locator_us-gaap_StatementLineItems_1711"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_StockIssuedDuringPeriodValueLongTermIncentivePlanActivity" xlink:label="Locator_exc_StockIssuedDuringPeriodValueLongTermIncentivePlanActivity_1712"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_StatementLineItems_1711" xlink:to="Locator_exc_StockIssuedDuringPeriodValueLongTermIncentivePlanActivity_1712" order="9.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementLineItems" xlink:label="Locator_us-gaap_StatementLineItems_1713"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan" xlink:label="Locator_us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan_1714"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_StatementLineItems_1713" xlink:to="Locator_us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan_1714" order="10.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementLineItems" xlink:label="Locator_us-gaap_StatementLineItems_1715"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_TreasuryStockValueAcquiredCostMethod" xlink:label="Locator_us-gaap_TreasuryStockValueAcquiredCostMethod_1716"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_StatementLineItems_1715" xlink:to="Locator_us-gaap_TreasuryStockValueAcquiredCostMethod_1716" order="11.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementLineItems" xlink:label="Locator_us-gaap_StatementLineItems_1717"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DividendsCommonStockCash" xlink:label="Locator_us-gaap_DividendsCommonStockCash_1718"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_StatementLineItems_1717" xlink:to="Locator_us-gaap_DividendsCommonStockCash_1718" order="12.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementLineItems" xlink:label="Locator_us-gaap_StatementLineItems_1719"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesAcquisitions" xlink:label="Locator_us-gaap_StockIssuedDuringPeriodSharesAcquisitions_1720"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_StatementLineItems_1719" xlink:to="Locator_us-gaap_StockIssuedDuringPeriodSharesAcquisitions_1720" order="13.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementLineItems" xlink:label="Locator_us-gaap_StatementLineItems_1721"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StockIssuedDuringPeriodValueAcquisitions" xlink:label="Locator_us-gaap_StockIssuedDuringPeriodValueAcquisitions_1722"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_StatementLineItems_1721" xlink:to="Locator_us-gaap_StockIssuedDuringPeriodValueAcquisitions_1722" order="14.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementLineItems" xlink:label="Locator_us-gaap_StatementLineItems_1723"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessCombinationAcquisitionOfLessThan100PercentNoncontrollingInterestFairValue" xlink:label="Locator_us-gaap_BusinessCombinationAcquisitionOfLessThan100PercentNoncontrollingInterestFairValue_1724"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_StatementLineItems_1723" xlink:to="Locator_us-gaap_BusinessCombinationAcquisitionOfLessThan100PercentNoncontrollingInterestFairValue_1724" order="15.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementLineItems" xlink:label="Locator_us-gaap_StatementLineItems_1725"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_MembersEquityIncludingPortionAttributableToNoncontrollingInterestAcquisitions" xlink:label="Locator_exc_MembersEquityIncludingPortionAttributableToNoncontrollingInterestAcquisitions_1726"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_StatementLineItems_1725" xlink:to="Locator_exc_MembersEquityIncludingPortionAttributableToNoncontrollingInterestAcquisitions_1726" order="16.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementLineItems" xlink:label="Locator_us-gaap_StatementLineItems_1727"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DistributionToMembers" xlink:label="Locator_exc_DistributionToMembers_1728"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_StatementLineItems_1727" xlink:to="Locator_exc_DistributionToMembers_1728" order="17.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementLineItems" xlink:label="Locator_us-gaap_StatementLineItems_1729"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AllocationOfTaxBenefitFromMembers" xlink:label="Locator_exc_AllocationOfTaxBenefitFromMembers_1730"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_StatementLineItems_1729" xlink:to="Locator_exc_AllocationOfTaxBenefitFromMembers_1730" order="18.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementLineItems" xlink:label="Locator_us-gaap_StatementLineItems_1731"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NewAccountingPronouncementOrChangeInAccountingPrincipleCumulativeEffectOfChangeOnEquityOrNetAssets" xlink:label="Locator_us-gaap_NewAccountingPronouncementOrChangeInAccountingPrincipleCumulativeEffectOfChangeOnEquityOrNetAssets_1732"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_StatementLineItems_1731" xlink:to="Locator_us-gaap_NewAccountingPronouncementOrChangeInAccountingPrincipleCumulativeEffectOfChangeOnEquityOrNetAssets_1732" order="19.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementLineItems" xlink:label="Locator_us-gaap_StatementLineItems_1733"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_TransferOfPensionAndNonPensionCostsBenefits" xlink:label="Locator_exc_TransferOfPensionAndNonPensionCostsBenefits_1734"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_StatementLineItems_1733" xlink:to="Locator_exc_TransferOfPensionAndNonPensionCostsBenefits_1734" order="20.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementLineItems" xlink:label="Locator_us-gaap_StatementLineItems_1735"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AdjustmentOfInitialAdoptionOfFin48" xlink:label="Locator_exc_AdjustmentOfInitialAdoptionOfFin48_1736"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_StatementLineItems_1735" xlink:to="Locator_exc_AdjustmentOfInitialAdoptionOfFin48_1736" order="21.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementLineItems" xlink:label="Locator_us-gaap_StatementLineItems_1737"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AllocationOfTaxBenefitFromParent" xlink:label="Locator_exc_AllocationOfTaxBenefitFromParent_1738"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_StatementLineItems_1737" xlink:to="Locator_exc_AllocationOfTaxBenefitFromParent_1738" order="22.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementLineItems" xlink:label="Locator_us-gaap_StatementLineItems_1739"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PreferenceStockAcquired" xlink:label="Locator_exc_PreferenceStockAcquired_1740"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_StatementLineItems_1739" xlink:to="Locator_exc_PreferenceStockAcquired_1740" order="23.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementLineItems" xlink:label="Locator_us-gaap_StatementLineItems_1741"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DividendsPreferredStockCash" xlink:label="Locator_us-gaap_DividendsPreferredStockCash_1742"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_StatementLineItems_1741" xlink:to="Locator_us-gaap_DividendsPreferredStockCash_1742" order="24.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementLineItems" xlink:label="Locator_us-gaap_StatementLineItems_1743"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RepaymentOfReceivableFromParent" xlink:label="Locator_exc_RepaymentOfReceivableFromParent_1744"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_StatementLineItems_1743" xlink:to="Locator_exc_RepaymentOfReceivableFromParent_1744" order="25.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementLineItems" xlink:label="Locator_us-gaap_StatementLineItems_1745"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_MinorityInterestIncreaseFromAcquisition" xlink:label="Locator_exc_MinorityInterestIncreaseFromAcquisition_1746"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_StatementLineItems_1745" xlink:to="Locator_exc_MinorityInterestIncreaseFromAcquisition_1746" order="26.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementLineItems" xlink:label="Locator_us-gaap_StatementLineItems_1747"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecrease" xlink:label="Locator_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecrease_1748"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_StatementLineItems_1747" xlink:to="Locator_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecrease_1748" order="27.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementLineItems" xlink:label="Locator_us-gaap_StatementLineItems_1749"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetIncomeLossAttributableToNoncontrollingInterest" xlink:label="Locator_us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_1750"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_StatementLineItems_1749" xlink:to="Locator_us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_1750" order="28.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementLineItems" xlink:label="Locator_us-gaap_StatementLineItems_1751"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_MembersEquityIncludingPortionAttributableToNoncontrollingInterest" xlink:label="Locator_exc_MembersEquityIncludingPortionAttributableToNoncontrollingInterest_1752"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_StatementLineItems_1751" xlink:to="Locator_exc_MembersEquityIncludingPortionAttributableToNoncontrollingInterest_1752" order="29.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementLineItems" xlink:label="Locator_us-gaap_StatementLineItems_1753"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest" xlink:label="Locator_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_1754"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_StatementLineItems_1753" xlink:to="Locator_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_1754" order="30.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementLineItems" xlink:label="Locator_us-gaap_StatementLineItems_1755"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_SharesIssued" xlink:label="Locator_us-gaap_SharesIssued_1756"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_StatementLineItems_1755" xlink:to="Locator_us-gaap_SharesIssued_1756" order="31.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementLineItems" xlink:label="Locator_us-gaap_StatementLineItems_1757"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StockholdersEquity" xlink:label="Locator_us-gaap_StockholdersEquity_1758"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_StatementLineItems_1757" xlink:to="Locator_us-gaap_StockholdersEquity_1758" order="32.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementLineItems" xlink:label="Locator_us-gaap_StatementLineItems_1655"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementTable" xlink:label="Locator_us-gaap_StatementTable_1656"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="Locator_us-gaap_StatementLineItems_1655" xlink:to="Locator_us-gaap_StatementTable_1656" order="0.5" xbrldt:contextElement="segment" xbrldt:closed="true"/> |
| | </definitionLink> |
| <definitionLink xlink:type="extended" xlink:role="http://exeloncorp.com/role/StatementConsolidatedStatementOfChangesInShareholdersEquityUnauditedParenthetical"> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_1817"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_1818"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_dei_LegalEntityAxis_1817" xlink:to="Locator_dei_EntityDomain_1818" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_1819"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ExelonGenerationCoLLCMember" xlink:label="Locator_exc_ExelonGenerationCoLLCMember_1820"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_1819" xlink:to="Locator_exc_ExelonGenerationCoLLCMember_1820" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_1823"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CommonwealthEdisonCoMember" xlink:label="Locator_exc_CommonwealthEdisonCoMember_1824"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_1823" xlink:to="Locator_exc_CommonwealthEdisonCoMember_1824" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_1821"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PecoEnergyCoMember" xlink:label="Locator_exc_PecoEnergyCoMember_1822"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_1821" xlink:to="Locator_exc_PecoEnergyCoMember_1822" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_1825"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BaltimoreGasAndElectricCompanyMember" xlink:label="Locator_exc_BaltimoreGasAndElectricCompanyMember_1826"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_1825" xlink:to="Locator_exc_BaltimoreGasAndElectricCompanyMember_1826" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementTable" xlink:label="Locator_us-gaap_StatementTable_1815"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementEquityComponentsAxis" xlink:label="Locator_us-gaap_StatementEquityComponentsAxis_1816"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_us-gaap_StatementTable_1815" xlink:to="Locator_us-gaap_StatementEquityComponentsAxis_1816" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementEquityComponentsAxis" xlink:label="Locator_us-gaap_StatementEquityComponentsAxis_1827"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="Locator_us-gaap_EquityComponentDomain_1828"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_us-gaap_StatementEquityComponentsAxis_1827" xlink:to="Locator_us-gaap_EquityComponentDomain_1828" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="Locator_us-gaap_EquityComponentDomain_1829"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember" xlink:label="Locator_us-gaap_AccumulatedOtherComprehensiveIncomeMember_1830"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_EquityComponentDomain_1829" xlink:to="Locator_us-gaap_AccumulatedOtherComprehensiveIncomeMember_1830" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementTable" xlink:label="Locator_us-gaap_StatementTable_1813"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_1814"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_us-gaap_StatementTable_1813" xlink:to="Locator_dei_LegalEntityAxis_1814" order="0.0"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementLineItems" xlink:label="Locator_us-gaap_StatementLineItems_1831"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CumulativeEffectOfInitialAdoptionOfSfas159Tax" xlink:label="Locator_exc_CumulativeEffectOfInitialAdoptionOfSfas159Tax_1832"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_StatementLineItems_1831" xlink:to="Locator_exc_CumulativeEffectOfInitialAdoptionOfSfas159Tax_1832" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementLineItems" xlink:label="Locator_us-gaap_StatementLineItems_1833"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_TransferOfPensionAndNonPensionCostsBenefitsTax" xlink:label="Locator_exc_TransferOfPensionAndNonPensionCostsBenefitsTax_1834"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_StatementLineItems_1833" xlink:to="Locator_exc_TransferOfPensionAndNonPensionCostsBenefitsTax_1834" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementLineItems" xlink:label="Locator_us-gaap_StatementLineItems_1835"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossTax" xlink:label="Locator_us-gaap_OtherComprehensiveIncomeLossTax_1836"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_StatementLineItems_1835" xlink:to="Locator_us-gaap_OtherComprehensiveIncomeLossTax_1836" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementLineItems" xlink:label="Locator_us-gaap_StatementLineItems_1809"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementTable" xlink:label="Locator_us-gaap_StatementTable_1810"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="Locator_us-gaap_StatementLineItems_1809" xlink:to="Locator_us-gaap_StatementTable_1810" order="0.5" xbrldt:contextElement="segment" xbrldt:closed="true"/> |
| | </definitionLink> |
| <definitionLink xlink:type="extended" xlink:role="http://exeloncorp.com/role/DisclosureRetirementBenefitsDetails"> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_2225"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_2226"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_dei_LegalEntityAxis_2225" xlink:to="Locator_dei_EntityDomain_2226" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_2227"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BusinessServicesCompanyMember" xlink:label="Locator_exc_BusinessServicesCompanyMember_2228"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_2227" xlink:to="Locator_exc_BusinessServicesCompanyMember_2228" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_2229"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ExelonGenerationCoLLCMember" xlink:label="Locator_exc_ExelonGenerationCoLLCMember_2230"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_2229" xlink:to="Locator_exc_ExelonGenerationCoLLCMember_2230" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_2231"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CommonwealthEdisonCoMember" xlink:label="Locator_exc_CommonwealthEdisonCoMember_2232"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_2231" xlink:to="Locator_exc_CommonwealthEdisonCoMember_2232" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_2233"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PecoEnergyCoMember" xlink:label="Locator_exc_PecoEnergyCoMember_2234"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_2233" xlink:to="Locator_exc_PecoEnergyCoMember_2234" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_2235"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BaltimoreGasAndElectricCompanyMember" xlink:label="Locator_exc_BaltimoreGasAndElectricCompanyMember_2236"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_2235" xlink:to="Locator_exc_BaltimoreGasAndElectricCompanyMember_2236" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FutureDefinedBenefitPlanAssumptionsAxis" xlink:label="Locator_exc_FutureDefinedBenefitPlanAssumptionsAxis_1883"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FiveYearDisclosureDomain" xlink:label="Locator_us-gaap_FiveYearDisclosureDomain_1884"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="Locator_exc_FutureDefinedBenefitPlanAssumptionsAxis_1883" xlink:to="Locator_us-gaap_FiveYearDisclosureDomain_1884" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FiveYearDisclosureDomain" xlink:label="Locator_us-gaap_FiveYearDisclosureDomain_2241"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_MoreThanFourAndWithinFiveYearsFromBalanceSheetDateMember" xlink:label="Locator_us-gaap_MoreThanFourAndWithinFiveYearsFromBalanceSheetDateMember_2242"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_FiveYearDisclosureDomain_2241" xlink:to="Locator_us-gaap_MoreThanFourAndWithinFiveYearsFromBalanceSheetDateMember_2242" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FiveYearDisclosureDomain" xlink:label="Locator_us-gaap_FiveYearDisclosureDomain_2243"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_MoreThanFiveYearsFromBalanceSheetDateAndThereafterMember" xlink:label="Locator_us-gaap_MoreThanFiveYearsFromBalanceSheetDateAndThereafterMember_2244"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_FiveYearDisclosureDomain_2243" xlink:to="Locator_us-gaap_MoreThanFiveYearsFromBalanceSheetDateAndThereafterMember_2244" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FiveYearDisclosureDomain" xlink:label="Locator_us-gaap_FiveYearDisclosureDomain_2237"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OneYearFromBalanceSheetDateMember" xlink:label="Locator_us-gaap_OneYearFromBalanceSheetDateMember_2238"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_FiveYearDisclosureDomain_2237" xlink:to="Locator_us-gaap_OneYearFromBalanceSheetDateMember_2238" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FiveYearDisclosureDomain" xlink:label="Locator_us-gaap_FiveYearDisclosureDomain_2239"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_MoreThanThreeAndWithinFourYearsFromBalanceSheetDateMember" xlink:label="Locator_us-gaap_MoreThanThreeAndWithinFourYearsFromBalanceSheetDateMember_2240"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_FiveYearDisclosureDomain_2239" xlink:to="Locator_us-gaap_MoreThanThreeAndWithinFourYearsFromBalanceSheetDateMember_2240" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueDefinedBenefitPlanMeasuredOnRecurringBasisDisclosureItemsAxis" xlink:label="Locator_exc_FairValueDefinedBenefitPlanMeasuredOnRecurringBasisDisclosureItemsAxis_1885"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueDefinedBenefitPlanMeasuredOnRecurringBasisDisclosureItemsDomain" xlink:label="Locator_exc_FairValueDefinedBenefitPlanMeasuredOnRecurringBasisDisclosureItemsDomain_1886"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="Locator_exc_FairValueDefinedBenefitPlanMeasuredOnRecurringBasisDisclosureItemsAxis_1885" xlink:to="Locator_exc_FairValueDefinedBenefitPlanMeasuredOnRecurringBasisDisclosureItemsDomain_1886" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueDefinedBenefitPlanMeasuredOnRecurringBasisDisclosureItemsDomain" xlink:label="Locator_exc_FairValueDefinedBenefitPlanMeasuredOnRecurringBasisDisclosureItemsDomain_2245"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FairValueInputsLevel1Member" xlink:label="Locator_us-gaap_FairValueInputsLevel1Member_2246"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FairValueDefinedBenefitPlanMeasuredOnRecurringBasisDisclosureItemsDomain_2245" xlink:to="Locator_us-gaap_FairValueInputsLevel1Member_2246" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueDefinedBenefitPlanMeasuredOnRecurringBasisDisclosureItemsDomain" xlink:label="Locator_exc_FairValueDefinedBenefitPlanMeasuredOnRecurringBasisDisclosureItemsDomain_2247"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FairValueInputsLevel2Member" xlink:label="Locator_us-gaap_FairValueInputsLevel2Member_2248"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FairValueDefinedBenefitPlanMeasuredOnRecurringBasisDisclosureItemsDomain_2247" xlink:to="Locator_us-gaap_FairValueInputsLevel2Member_2248" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueDefinedBenefitPlanMeasuredOnRecurringBasisDisclosureItemsDomain" xlink:label="Locator_exc_FairValueDefinedBenefitPlanMeasuredOnRecurringBasisDisclosureItemsDomain_2249"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FairValueInputsLevel3Member" xlink:label="Locator_us-gaap_FairValueInputsLevel3Member_2250"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FairValueDefinedBenefitPlanMeasuredOnRecurringBasisDisclosureItemsDomain_2249" xlink:to="Locator_us-gaap_FairValueInputsLevel3Member_2250" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis" xlink:label="Locator_us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis_1887"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlansDomain" xlink:label="Locator_us-gaap_DefinedBenefitPlansDomain_1888"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="Locator_us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis_1887" xlink:to="Locator_us-gaap_DefinedBenefitPlansDomain_1888" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis" xlink:label="Locator_us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis_2251"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlansDomain" xlink:label="Locator_us-gaap_DefinedBenefitPlansDomain_2252"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis_2251" xlink:to="Locator_us-gaap_DefinedBenefitPlansDomain_2252" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlansDomain" xlink:label="Locator_us-gaap_DefinedBenefitPlansDomain_2253"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PensionPlansDefinedBenefitMember" xlink:label="Locator_us-gaap_PensionPlansDefinedBenefitMember_2254"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DefinedBenefitPlansDomain_2253" xlink:to="Locator_us-gaap_PensionPlansDefinedBenefitMember_2254" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlansDomain" xlink:label="Locator_us-gaap_DefinedBenefitPlansDomain_2255"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember" xlink:label="Locator_us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_2256"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DefinedBenefitPlansDomain_2255" xlink:to="Locator_us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_2256" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanLegacyAxis" xlink:label="Locator_exc_DefinedBenefitPlanLegacyAxis_1889"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanLegacyDomain" xlink:label="Locator_exc_DefinedBenefitPlanLegacyDomain_1890"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="Locator_exc_DefinedBenefitPlanLegacyAxis_1889" xlink:to="Locator_exc_DefinedBenefitPlanLegacyDomain_1890" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanLegacyAxis" xlink:label="Locator_exc_DefinedBenefitPlanLegacyAxis_2257"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanLegacyDomain" xlink:label="Locator_exc_DefinedBenefitPlanLegacyDomain_2258"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_exc_DefinedBenefitPlanLegacyAxis_2257" xlink:to="Locator_exc_DefinedBenefitPlanLegacyDomain_2258" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanLegacyDomain" xlink:label="Locator_exc_DefinedBenefitPlanLegacyDomain_2259"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ExelonLegacyBenefitPlansMember" xlink:label="Locator_exc_ExelonLegacyBenefitPlansMember_2260"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_DefinedBenefitPlanLegacyDomain_2259" xlink:to="Locator_exc_ExelonLegacyBenefitPlansMember_2260" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanLegacyDomain" xlink:label="Locator_exc_DefinedBenefitPlanLegacyDomain_2261"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ConstellationLegacyBenefitPlansMember" xlink:label="Locator_exc_ConstellationLegacyBenefitPlansMember_2262"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_DefinedBenefitPlanLegacyDomain_2261" xlink:to="Locator_exc_ConstellationLegacyBenefitPlansMember_2262" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanDisclosureLineItems" xlink:label="Locator_us-gaap_DefinedBenefitPlanDisclosureLineItems_1955"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable" xlink:label="Locator_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_1956"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="Locator_us-gaap_DefinedBenefitPlanDisclosureLineItems_1955" xlink:to="Locator_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_1956" order="0.5" xbrldt:contextElement="segment" xbrldt:closed="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable" xlink:label="Locator_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_2219"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis" xlink:label="Locator_us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis_2220"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_2219" xlink:to="Locator_us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis_2220" order="0.0"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable" xlink:label="Locator_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_2221"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_2222"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_2221" xlink:to="Locator_dei_LegalEntityAxis_2222" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable" xlink:label="Locator_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_2223"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanLegacyAxis" xlink:label="Locator_exc_DefinedBenefitPlanLegacyAxis_2224"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_2223" xlink:to="Locator_exc_DefinedBenefitPlanLegacyAxis_2224" order="2.0"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanDisclosureLineItems" xlink:label="Locator_us-gaap_DefinedBenefitPlanDisclosureLineItems_2263"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanEffectOfOnePercentagePointChangeInAssumedHealthCareCostTrendRatesAbstract" xlink:label="Locator_us-gaap_DefinedBenefitPlanEffectOfOnePercentagePointChangeInAssumedHealthCareCostTrendRatesAbstract_2264"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DefinedBenefitPlanDisclosureLineItems_2263" xlink:to="Locator_us-gaap_DefinedBenefitPlanEffectOfOnePercentagePointChangeInAssumedHealthCareCostTrendRatesAbstract_2264" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanEffectOfOnePercentagePointChangeInAssumedHealthCareCostTrendRatesAbstract" xlink:label="Locator_us-gaap_DefinedBenefitPlanEffectOfOnePercentagePointChangeInAssumedHealthCareCostTrendRatesAbstract_2265"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanEffectOfOnePercentagePointIncreaseOnServiceAndInterestCostComponents" xlink:label="Locator_us-gaap_DefinedBenefitPlanEffectOfOnePercentagePointIncreaseOnServiceAndInterestCostComponents_2266"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DefinedBenefitPlanEffectOfOnePercentagePointChangeInAssumedHealthCareCostTrendRatesAbstract_2265" xlink:to="Locator_us-gaap_DefinedBenefitPlanEffectOfOnePercentagePointIncreaseOnServiceAndInterestCostComponents_2266" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanEffectOfOnePercentagePointChangeInAssumedHealthCareCostTrendRatesAbstract" xlink:label="Locator_us-gaap_DefinedBenefitPlanEffectOfOnePercentagePointChangeInAssumedHealthCareCostTrendRatesAbstract_2267"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanEffectOfOnePercentagePointIncreaseOnAccumulatedPostretirementBenefitObligation" xlink:label="Locator_us-gaap_DefinedBenefitPlanEffectOfOnePercentagePointIncreaseOnAccumulatedPostretirementBenefitObligation_2268"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DefinedBenefitPlanEffectOfOnePercentagePointChangeInAssumedHealthCareCostTrendRatesAbstract_2267" xlink:to="Locator_us-gaap_DefinedBenefitPlanEffectOfOnePercentagePointIncreaseOnAccumulatedPostretirementBenefitObligation_2268" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanEffectOfOnePercentagePointChangeInAssumedHealthCareCostTrendRatesAbstract" xlink:label="Locator_us-gaap_DefinedBenefitPlanEffectOfOnePercentagePointChangeInAssumedHealthCareCostTrendRatesAbstract_2269"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanEffectOfOnePercentagePointDecreaseOnServiceAndInterestCostComponents" xlink:label="Locator_us-gaap_DefinedBenefitPlanEffectOfOnePercentagePointDecreaseOnServiceAndInterestCostComponents_2270"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DefinedBenefitPlanEffectOfOnePercentagePointChangeInAssumedHealthCareCostTrendRatesAbstract_2269" xlink:to="Locator_us-gaap_DefinedBenefitPlanEffectOfOnePercentagePointDecreaseOnServiceAndInterestCostComponents_2270" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanEffectOfOnePercentagePointChangeInAssumedHealthCareCostTrendRatesAbstract" xlink:label="Locator_us-gaap_DefinedBenefitPlanEffectOfOnePercentagePointChangeInAssumedHealthCareCostTrendRatesAbstract_2271"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanEffectOfOnePercentagePointDecreaseOnAccumulatedPostretirementBenefitObligation" xlink:label="Locator_us-gaap_DefinedBenefitPlanEffectOfOnePercentagePointDecreaseOnAccumulatedPostretirementBenefitObligation_2272"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DefinedBenefitPlanEffectOfOnePercentagePointChangeInAssumedHealthCareCostTrendRatesAbstract_2271" xlink:to="Locator_us-gaap_DefinedBenefitPlanEffectOfOnePercentagePointDecreaseOnAccumulatedPostretirementBenefitObligation_2272" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanDisclosureLineItems" xlink:label="Locator_us-gaap_DefinedBenefitPlanDisclosureLineItems_2273"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAbstract" xlink:label="Locator_us-gaap_DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAbstract_2274"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DefinedBenefitPlanDisclosureLineItems_2273" xlink:to="Locator_us-gaap_DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAbstract_2274" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAbstract" xlink:label="Locator_us-gaap_DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAbstract_2275"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanPensionPlansWithProjectedBenefitObligationsInExcessOfPlanAssetsAggregateprojectedbenefitobligation" xlink:label="Locator_exc_DefinedBenefitPlanPensionPlansWithProjectedBenefitObligationsInExcessOfPlanAssetsAggregateprojectedbenefitobligation_2276"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAbstract_2275" xlink:to="Locator_exc_DefinedBenefitPlanPensionPlansWithProjectedBenefitObligationsInExcessOfPlanAssetsAggregateprojectedbenefitobligation_2276" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAbstract" xlink:label="Locator_us-gaap_DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAbstract_2277"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanPensionPlansWithProjectedBenefitObligationsInExcessOfPlanAssetsAggregateAccumulatedBenefitObligation" xlink:label="Locator_exc_DefinedBenefitPlanPensionPlansWithProjectedBenefitObligationsInExcessOfPlanAssetsAggregateAccumulatedBenefitObligation_2278"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAbstract_2277" xlink:to="Locator_exc_DefinedBenefitPlanPensionPlansWithProjectedBenefitObligationsInExcessOfPlanAssetsAggregateAccumulatedBenefitObligation_2278" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAbstract" xlink:label="Locator_us-gaap_DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAbstract_2279"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanPensionPlansWithProjectedBenefitObligationsInExcessOfPlanAssetsAggregateFairValueOfPlanAssets" xlink:label="Locator_exc_DefinedBenefitPlanPensionPlansWithProjectedBenefitObligationsInExcessOfPlanAssetsAggregateFairValueOfPlanAssets_2280"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAbstract_2279" xlink:to="Locator_exc_DefinedBenefitPlanPensionPlansWithProjectedBenefitObligationsInExcessOfPlanAssetsAggregateFairValueOfPlanAssets_2280" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanDisclosureLineItems" xlink:label="Locator_us-gaap_DefinedBenefitPlanDisclosureLineItems_2281"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward" xlink:label="Locator_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_2282"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DefinedBenefitPlanDisclosureLineItems_2281" xlink:to="Locator_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_2282" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward" xlink:label="Locator_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_2283"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanBenefitObligation" xlink:label="Locator_us-gaap_DefinedBenefitPlanBenefitObligation_2284"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_2283" xlink:to="Locator_us-gaap_DefinedBenefitPlanBenefitObligation_2284" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward" xlink:label="Locator_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_2285"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanServiceCost" xlink:label="Locator_us-gaap_DefinedBenefitPlanServiceCost_2286"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_2285" xlink:to="Locator_us-gaap_DefinedBenefitPlanServiceCost_2286" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward" xlink:label="Locator_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_2287"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanInterestCost" xlink:label="Locator_us-gaap_DefinedBenefitPlanInterestCost_2288"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_2287" xlink:to="Locator_us-gaap_DefinedBenefitPlanInterestCost_2288" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward" xlink:label="Locator_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_2289"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanContributionsByPlanParticipants" xlink:label="Locator_us-gaap_DefinedBenefitPlanContributionsByPlanParticipants_2290"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_2289" xlink:to="Locator_us-gaap_DefinedBenefitPlanContributionsByPlanParticipants_2290" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward" xlink:label="Locator_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_2291"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanActuarialNetGainsLosses" xlink:label="Locator_us-gaap_DefinedBenefitPlanActuarialNetGainsLosses_2292"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_2291" xlink:to="Locator_us-gaap_DefinedBenefitPlanActuarialNetGainsLosses_2292" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward" xlink:label="Locator_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_2293"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanPlanAmendments" xlink:label="Locator_us-gaap_DefinedBenefitPlanPlanAmendments_2294"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_2293" xlink:to="Locator_us-gaap_DefinedBenefitPlanPlanAmendments_2294" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward" xlink:label="Locator_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_2295"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanEffectOfSettlementsAndCurtailmentsOnAccumulatedBenefitObligation" xlink:label="Locator_us-gaap_DefinedBenefitPlanEffectOfSettlementsAndCurtailmentsOnAccumulatedBenefitObligation_2296"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_2295" xlink:to="Locator_us-gaap_DefinedBenefitPlanEffectOfSettlementsAndCurtailmentsOnAccumulatedBenefitObligation_2296" order="7.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward" xlink:label="Locator_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_2297"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanSpecialTerminationBenefits" xlink:label="Locator_us-gaap_DefinedBenefitPlanSpecialTerminationBenefits_2298"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_2297" xlink:to="Locator_us-gaap_DefinedBenefitPlanSpecialTerminationBenefits_2298" order="8.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward" xlink:label="Locator_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_2299"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanBenefitsPaid" xlink:label="Locator_us-gaap_DefinedBenefitPlanBenefitsPaid_2300"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_2299" xlink:to="Locator_us-gaap_DefinedBenefitPlanBenefitsPaid_2300" order="9.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward" xlink:label="Locator_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_2301"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanGrossPrescriptionDrugSubsidyReceiptsReceived" xlink:label="Locator_us-gaap_DefinedBenefitPlanGrossPrescriptionDrugSubsidyReceiptsReceived_2302"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_2301" xlink:to="Locator_us-gaap_DefinedBenefitPlanGrossPrescriptionDrugSubsidyReceiptsReceived_2302" order="10.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward" xlink:label="Locator_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_2303"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ReinsuranceProceedsReceived" xlink:label="Locator_exc_ReinsuranceProceedsReceived_2304"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_2303" xlink:to="Locator_exc_ReinsuranceProceedsReceived_2304" order="12.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanDisclosureLineItems" xlink:label="Locator_us-gaap_DefinedBenefitPlanDisclosureLineItems_2305"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsRollForward" xlink:label="Locator_us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsRollForward_2306"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DefinedBenefitPlanDisclosureLineItems_2305" xlink:to="Locator_us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsRollForward_2306" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsRollForward" xlink:label="Locator_us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsRollForward_2307"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanFairValueOfPlanAssets" xlink:label="Locator_us-gaap_DefinedBenefitPlanFairValueOfPlanAssets_2308"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsRollForward_2307" xlink:to="Locator_us-gaap_DefinedBenefitPlanFairValueOfPlanAssets_2308" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsRollForward" xlink:label="Locator_us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsRollForward_2309"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanActualReturnOnPlanAssets" xlink:label="Locator_us-gaap_DefinedBenefitPlanActualReturnOnPlanAssets_2310"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsRollForward_2309" xlink:to="Locator_us-gaap_DefinedBenefitPlanActualReturnOnPlanAssets_2310" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsRollForward" xlink:label="Locator_us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsRollForward_2311"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanContributionsByEmployer" xlink:label="Locator_us-gaap_DefinedBenefitPlanContributionsByEmployer_2312"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsRollForward_2311" xlink:to="Locator_us-gaap_DefinedBenefitPlanContributionsByEmployer_2312" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsRollForward" xlink:label="Locator_us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsRollForward_2313"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BenefitsPaidNet" xlink:label="Locator_exc_BenefitsPaidNet_2314"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsRollForward_2313" xlink:to="Locator_exc_BenefitsPaidNet_2314" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanDisclosureLineItems" xlink:label="Locator_us-gaap_DefinedBenefitPlanDisclosureLineItems_2315"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract" xlink:label="Locator_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_2316"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DefinedBenefitPlanDisclosureLineItems_2315" xlink:to="Locator_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_2316" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract" xlink:label="Locator_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_2317"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets" xlink:label="Locator_us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets_2318"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_2317" xlink:to="Locator_us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets_2318" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract" xlink:label="Locator_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_2319"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanSettlementsBenefitObligation" xlink:label="Locator_us-gaap_DefinedBenefitPlanSettlementsBenefitObligation_2320"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_2319" xlink:to="Locator_us-gaap_DefinedBenefitPlanSettlementsBenefitObligation_2320" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract" xlink:label="Locator_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_2321"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AdjustmentForAmortizationAbstract" xlink:label="Locator_us-gaap_AdjustmentForAmortizationAbstract_2322"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_2321" xlink:to="Locator_us-gaap_AdjustmentForAmortizationAbstract_2322" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AdjustmentForAmortizationAbstract" xlink:label="Locator_us-gaap_AdjustmentForAmortizationAbstract_2323"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanAmortizationOfTransitionObligationsAssets" xlink:label="Locator_us-gaap_DefinedBenefitPlanAmortizationOfTransitionObligationsAssets_2324"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_AdjustmentForAmortizationAbstract_2323" xlink:to="Locator_us-gaap_DefinedBenefitPlanAmortizationOfTransitionObligationsAssets_2324" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AdjustmentForAmortizationAbstract" xlink:label="Locator_us-gaap_AdjustmentForAmortizationAbstract_2325"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit" xlink:label="Locator_us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit_2326"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_AdjustmentForAmortizationAbstract_2325" xlink:to="Locator_us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit_2326" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract" xlink:label="Locator_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_2327"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToSettlementsAndCurtailments" xlink:label="Locator_us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToSettlementsAndCurtailments_2328"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_2327" xlink:to="Locator_us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToSettlementsAndCurtailments_2328" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract" xlink:label="Locator_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_2329"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanCostOfProvidingSpecialOrContractualTerminationBenefitRecognizedDuringPeriod" xlink:label="Locator_us-gaap_DefinedBenefitPlanCostOfProvidingSpecialOrContractualTerminationBenefitRecognizedDuringPeriod_2330"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_2329" xlink:to="Locator_us-gaap_DefinedBenefitPlanCostOfProvidingSpecialOrContractualTerminationBenefitRecognizedDuringPeriod_2330" order="7.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract" xlink:label="Locator_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_2331"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost" xlink:label="Locator_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_2332"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_2331" xlink:to="Locator_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_2332" order="8.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanDisclosureLineItems" xlink:label="Locator_us-gaap_DefinedBenefitPlanDisclosureLineItems_2333"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanAmountsRecognizedInBalanceSheetAbstract" xlink:label="Locator_us-gaap_DefinedBenefitPlanAmountsRecognizedInBalanceSheetAbstract_2334"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DefinedBenefitPlanDisclosureLineItems_2333" xlink:to="Locator_us-gaap_DefinedBenefitPlanAmountsRecognizedInBalanceSheetAbstract_2334" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanAmountsRecognizedInBalanceSheetAbstract" xlink:label="Locator_us-gaap_DefinedBenefitPlanAmountsRecognizedInBalanceSheetAbstract_2335"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities" xlink:label="Locator_us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities_2336"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DefinedBenefitPlanAmountsRecognizedInBalanceSheetAbstract_2335" xlink:to="Locator_us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities_2336" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanAmountsRecognizedInBalanceSheetAbstract" xlink:label="Locator_us-gaap_DefinedBenefitPlanAmountsRecognizedInBalanceSheetAbstract_2337"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent" xlink:label="Locator_us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent_2338"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DefinedBenefitPlanAmountsRecognizedInBalanceSheetAbstract_2337" xlink:to="Locator_us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent_2338" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanAmountsRecognizedInBalanceSheetAbstract" xlink:label="Locator_us-gaap_DefinedBenefitPlanAmountsRecognizedInBalanceSheetAbstract_2339"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent" xlink:label="Locator_exc_OtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent_2340"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DefinedBenefitPlanAmountsRecognizedInBalanceSheetAbstract_2339" xlink:to="Locator_exc_OtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent_2340" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanAmountsRecognizedInBalanceSheetAbstract" xlink:label="Locator_us-gaap_DefinedBenefitPlanAmountsRecognizedInBalanceSheetAbstract_2341"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanAmountsRecognizedInBalanceSheet" xlink:label="Locator_us-gaap_DefinedBenefitPlanAmountsRecognizedInBalanceSheet_2342"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DefinedBenefitPlanAmountsRecognizedInBalanceSheetAbstract_2341" xlink:to="Locator_us-gaap_DefinedBenefitPlanAmountsRecognizedInBalanceSheet_2342" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanDisclosureLineItems" xlink:label="Locator_us-gaap_DefinedBenefitPlanDisclosureLineItems_2343"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PrescriptionDrugBenefitEffectOfSubsidyOnNetPeriodicPostretirementBenefitCostAbstract" xlink:label="Locator_exc_PrescriptionDrugBenefitEffectOfSubsidyOnNetPeriodicPostretirementBenefitCostAbstract_2344"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DefinedBenefitPlanDisclosureLineItems_2343" xlink:to="Locator_exc_PrescriptionDrugBenefitEffectOfSubsidyOnNetPeriodicPostretirementBenefitCostAbstract_2344" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PrescriptionDrugBenefitEffectOfSubsidyOnNetPeriodicPostretirementBenefitCostAbstract" xlink:label="Locator_exc_PrescriptionDrugBenefitEffectOfSubsidyOnNetPeriodicPostretirementBenefitCostAbstract_2345"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PrescriptionDrugBenefitEffectOfSubsidyOnNetPeriodicPostretirementBenefitCostAmortizationOfActuarialExperienceGainLoss" xlink:label="Locator_exc_PrescriptionDrugBenefitEffectOfSubsidyOnNetPeriodicPostretirementBenefitCostAmortizationOfActuarialExperienceGainLoss_2346"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_PrescriptionDrugBenefitEffectOfSubsidyOnNetPeriodicPostretirementBenefitCostAbstract_2345" xlink:to="Locator_exc_PrescriptionDrugBenefitEffectOfSubsidyOnNetPeriodicPostretirementBenefitCostAmortizationOfActuarialExperienceGainLoss_2346" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PrescriptionDrugBenefitEffectOfSubsidyOnNetPeriodicPostretirementBenefitCostAbstract" xlink:label="Locator_exc_PrescriptionDrugBenefitEffectOfSubsidyOnNetPeriodicPostretirementBenefitCostAbstract_2347"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PrescriptionDrugBenefitEffectOfSubsidyOnNetPeriodicPostretirementBenefitCostReductionInServiceCost" xlink:label="Locator_exc_PrescriptionDrugBenefitEffectOfSubsidyOnNetPeriodicPostretirementBenefitCostReductionInServiceCost_2348"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_PrescriptionDrugBenefitEffectOfSubsidyOnNetPeriodicPostretirementBenefitCostAbstract_2347" xlink:to="Locator_exc_PrescriptionDrugBenefitEffectOfSubsidyOnNetPeriodicPostretirementBenefitCostReductionInServiceCost_2348" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PrescriptionDrugBenefitEffectOfSubsidyOnNetPeriodicPostretirementBenefitCostAbstract" xlink:label="Locator_exc_PrescriptionDrugBenefitEffectOfSubsidyOnNetPeriodicPostretirementBenefitCostAbstract_2349"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PrescriptionDrugBenefitEffectOfSubsidyOnNetPeriodicPostretirementBenefitCostReductionInInterestCostOnAccumulatedPostretirementBenefitObligation" xlink:label="Locator_exc_PrescriptionDrugBenefitEffectOfSubsidyOnNetPeriodicPostretirementBenefitCostReductionInInterestCostOnAccumulatedPostretirementBenefitObligation_2350"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_PrescriptionDrugBenefitEffectOfSubsidyOnNetPeriodicPostretirementBenefitCostAbstract_2349" xlink:to="Locator_exc_PrescriptionDrugBenefitEffectOfSubsidyOnNetPeriodicPostretirementBenefitCostReductionInInterestCostOnAccumulatedPostretirementBenefitObligation_2350" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PrescriptionDrugBenefitEffectOfSubsidyOnNetPeriodicPostretirementBenefitCostAbstract" xlink:label="Locator_exc_PrescriptionDrugBenefitEffectOfSubsidyOnNetPeriodicPostretirementBenefitCostAbstract_2351"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PrescriptionDrugBenefitEffectOfSubsidyOnNetPeriodicPostretirementBenefitCost" xlink:label="Locator_us-gaap_PrescriptionDrugBenefitEffectOfSubsidyOnNetPeriodicPostretirementBenefitCost_2352"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_PrescriptionDrugBenefitEffectOfSubsidyOnNetPeriodicPostretirementBenefitCostAbstract_2351" xlink:to="Locator_us-gaap_PrescriptionDrugBenefitEffectOfSubsidyOnNetPeriodicPostretirementBenefitCost_2352" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanDisclosureLineItems" xlink:label="Locator_us-gaap_DefinedBenefitPlanDisclosureLineItems_2353"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ChangesInPlanAssetsAndBenefitObligationsRecognizedInOciAndRegulatoryAssetsAbstract" xlink:label="Locator_exc_ChangesInPlanAssetsAndBenefitObligationsRecognizedInOciAndRegulatoryAssetsAbstract_2354"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DefinedBenefitPlanDisclosureLineItems_2353" xlink:to="Locator_exc_ChangesInPlanAssetsAndBenefitObligationsRecognizedInOciAndRegulatoryAssetsAbstract_2354" order="7.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ChangesInPlanAssetsAndBenefitObligationsRecognizedInOciAndRegulatoryAssetsAbstract" xlink:label="Locator_exc_ChangesInPlanAssetsAndBenefitObligationsRecognizedInOciAndRegulatoryAssetsAbstract_2355"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeAndRegulatoryAssetsNetGainsLossesBeforeTax" xlink:label="Locator_exc_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeAndRegulatoryAssetsNetGainsLossesBeforeTax_2356"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_ChangesInPlanAssetsAndBenefitObligationsRecognizedInOciAndRegulatoryAssetsAbstract_2355" xlink:to="Locator_exc_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeAndRegulatoryAssetsNetGainsLossesBeforeTax_2356" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ChangesInPlanAssetsAndBenefitObligationsRecognizedInOciAndRegulatoryAssetsAbstract" xlink:label="Locator_exc_ChangesInPlanAssetsAndBenefitObligationsRecognizedInOciAndRegulatoryAssetsAbstract_2357"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanAmortizationOfNetGainsLossesInOciAndRegulatoryAssets" xlink:label="Locator_exc_DefinedBenefitPlanAmortizationOfNetGainsLossesInOciAndRegulatoryAssets_2358"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_ChangesInPlanAssetsAndBenefitObligationsRecognizedInOciAndRegulatoryAssetsAbstract_2357" xlink:to="Locator_exc_DefinedBenefitPlanAmortizationOfNetGainsLossesInOciAndRegulatoryAssets_2358" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ChangesInPlanAssetsAndBenefitObligationsRecognizedInOciAndRegulatoryAssetsAbstract" xlink:label="Locator_exc_ChangesInPlanAssetsAndBenefitObligationsRecognizedInOciAndRegulatoryAssetsAbstract_2359"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeAndRegulatoryAssetsNetPriorServiceCostCreditBeforeTax" xlink:label="Locator_exc_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeAndRegulatoryAssetsNetPriorServiceCostCreditBeforeTax_2360"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_ChangesInPlanAssetsAndBenefitObligationsRecognizedInOciAndRegulatoryAssetsAbstract_2359" xlink:to="Locator_exc_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeAndRegulatoryAssetsNetPriorServiceCostCreditBeforeTax_2360" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ChangesInPlanAssetsAndBenefitObligationsRecognizedInOciAndRegulatoryAssetsAbstract" xlink:label="Locator_exc_ChangesInPlanAssetsAndBenefitObligationsRecognizedInOciAndRegulatoryAssetsAbstract_2361"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanAmortizationOfNetPriorServiceCostCreditInOciAndRegulatoryAssets" xlink:label="Locator_exc_DefinedBenefitPlanAmortizationOfNetPriorServiceCostCreditInOciAndRegulatoryAssets_2362"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_ChangesInPlanAssetsAndBenefitObligationsRecognizedInOciAndRegulatoryAssetsAbstract_2361" xlink:to="Locator_exc_DefinedBenefitPlanAmortizationOfNetPriorServiceCostCreditInOciAndRegulatoryAssets_2362" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ChangesInPlanAssetsAndBenefitObligationsRecognizedInOciAndRegulatoryAssetsAbstract" xlink:label="Locator_exc_ChangesInPlanAssetsAndBenefitObligationsRecognizedInOciAndRegulatoryAssetsAbstract_2363"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanAmortizationOfNetTransitionAssetObligationInOciAndRegulatoryAssets" xlink:label="Locator_exc_DefinedBenefitPlanAmortizationOfNetTransitionAssetObligationInOciAndRegulatoryAssets_2364"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_ChangesInPlanAssetsAndBenefitObligationsRecognizedInOciAndRegulatoryAssetsAbstract_2363" xlink:to="Locator_exc_DefinedBenefitPlanAmortizationOfNetTransitionAssetObligationInOciAndRegulatoryAssets_2364" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ChangesInPlanAssetsAndBenefitObligationsRecognizedInOciAndRegulatoryAssetsAbstract" xlink:label="Locator_exc_ChangesInPlanAssetsAndBenefitObligationsRecognizedInOciAndRegulatoryAssetsAbstract_2365"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeSettlementsBeforeTax" xlink:label="Locator_exc_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeSettlementsBeforeTax_2366"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_ChangesInPlanAssetsAndBenefitObligationsRecognizedInOciAndRegulatoryAssetsAbstract_2365" xlink:to="Locator_exc_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeSettlementsBeforeTax_2366" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ChangesInPlanAssetsAndBenefitObligationsRecognizedInOciAndRegulatoryAssetsAbstract" xlink:label="Locator_exc_ChangesInPlanAssetsAndBenefitObligationsRecognizedInOciAndRegulatoryAssetsAbstract_2367"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeAndRegulatoryAssetsBeforeTax" xlink:label="Locator_exc_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeAndRegulatoryAssetsBeforeTax_2368"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_ChangesInPlanAssetsAndBenefitObligationsRecognizedInOciAndRegulatoryAssetsAbstract_2367" xlink:to="Locator_exc_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeAndRegulatoryAssetsBeforeTax_2368" order="7.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ChangesInPlanAssetsAndBenefitObligationsRecognizedInOciAndRegulatoryAssetsAbstract" xlink:label="Locator_exc_ChangesInPlanAssetsAndBenefitObligationsRecognizedInOciAndRegulatoryAssetsAbstract_2369"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanAmountsRecognizedInOtherComprehensiveIncomeBeforeTax" xlink:label="Locator_exc_DefinedBenefitPlanAmountsRecognizedInOtherComprehensiveIncomeBeforeTax_2370"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_ChangesInPlanAssetsAndBenefitObligationsRecognizedInOciAndRegulatoryAssetsAbstract_2369" xlink:to="Locator_exc_DefinedBenefitPlanAmountsRecognizedInOtherComprehensiveIncomeBeforeTax_2370" order="8.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ChangesInPlanAssetsAndBenefitObligationsRecognizedInOciAndRegulatoryAssetsAbstract" xlink:label="Locator_exc_ChangesInPlanAssetsAndBenefitObligationsRecognizedInOciAndRegulatoryAssetsAbstract_2371"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanAmountsRecognizedInRegulatoryAssetsBeforeTax" xlink:label="Locator_exc_DefinedBenefitPlanAmountsRecognizedInRegulatoryAssetsBeforeTax_2372"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_ChangesInPlanAssetsAndBenefitObligationsRecognizedInOciAndRegulatoryAssetsAbstract_2371" xlink:to="Locator_exc_DefinedBenefitPlanAmountsRecognizedInRegulatoryAssetsBeforeTax_2372" order="9.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanDisclosureLineItems" xlink:label="Locator_us-gaap_DefinedBenefitPlanDisclosureLineItems_2373"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeAndRegulatoryAssetsBeforeTaxAbstract" xlink:label="Locator_exc_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeAndRegulatoryAssetsBeforeTaxAbstract_2374"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DefinedBenefitPlanDisclosureLineItems_2373" xlink:to="Locator_exc_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeAndRegulatoryAssetsBeforeTaxAbstract_2374" order="8.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeAndRegulatoryAssetsBeforeTaxAbstract" xlink:label="Locator_exc_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeAndRegulatoryAssetsBeforeTaxAbstract_2375"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeAndRegulatoryAssetsTransitionAssetsObligationsBeforeTax" xlink:label="Locator_exc_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeAndRegulatoryAssetsTransitionAssetsObligationsBeforeTax_2376"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeAndRegulatoryAssetsBeforeTaxAbstract_2375" xlink:to="Locator_exc_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeAndRegulatoryAssetsTransitionAssetsObligationsBeforeTax_2376" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeAndRegulatoryAssetsBeforeTaxAbstract" xlink:label="Locator_exc_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeAndRegulatoryAssetsBeforeTaxAbstract_2377"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeAndRegulatoryAssetsPriorServiceCostCreditBeforeTax" xlink:label="Locator_exc_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeAndRegulatoryAssetsPriorServiceCostCreditBeforeTax_2378"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeAndRegulatoryAssetsBeforeTaxAbstract_2377" xlink:to="Locator_exc_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeAndRegulatoryAssetsPriorServiceCostCreditBeforeTax_2378" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeAndRegulatoryAssetsBeforeTaxAbstract" xlink:label="Locator_exc_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeAndRegulatoryAssetsBeforeTaxAbstract_2379"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeAndRegulatoryAssetsGainsLossesBeforeTax" xlink:label="Locator_exc_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeAndRegulatoryAssetsGainsLossesBeforeTax_2380"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeAndRegulatoryAssetsBeforeTaxAbstract_2379" xlink:to="Locator_exc_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeAndRegulatoryAssetsGainsLossesBeforeTax_2380" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeAndRegulatoryAssetsBeforeTaxAbstract" xlink:label="Locator_exc_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeAndRegulatoryAssetsBeforeTaxAbstract_2381"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeAndRegulatoryAssetsBeforeTaxNotYetRecognized" xlink:label="Locator_exc_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeAndRegulatoryAssetsBeforeTaxNotYetRecognized_2382"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeAndRegulatoryAssetsBeforeTaxAbstract_2381" xlink:to="Locator_exc_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeAndRegulatoryAssetsBeforeTaxNotYetRecognized_2382" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeAndRegulatoryAssetsBeforeTaxAbstract" xlink:label="Locator_exc_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeAndRegulatoryAssetsBeforeTaxAbstract_2383"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTax" xlink:label="Locator_us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTax_2384"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeAndRegulatoryAssetsBeforeTaxAbstract_2383" xlink:to="Locator_us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTax_2384" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeAndRegulatoryAssetsBeforeTaxAbstract" xlink:label="Locator_exc_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeAndRegulatoryAssetsBeforeTaxAbstract_2385"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanRegulatoryAssetsBeforeTax" xlink:label="Locator_exc_DefinedBenefitPlanRegulatoryAssetsBeforeTax_2386"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeAndRegulatoryAssetsBeforeTaxAbstract_2385" xlink:to="Locator_exc_DefinedBenefitPlanRegulatoryAssetsBeforeTax_2386" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanDisclosureLineItems" xlink:label="Locator_us-gaap_DefinedBenefitPlanDisclosureLineItems_2387"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeAndRegulatoryAssetsToBeAmortizedBeforeTaxAbstract" xlink:label="Locator_exc_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeAndRegulatoryAssetsToBeAmortizedBeforeTaxAbstract_2388"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DefinedBenefitPlanDisclosureLineItems_2387" xlink:to="Locator_exc_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeAndRegulatoryAssetsToBeAmortizedBeforeTaxAbstract_2388" order="9.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeAndRegulatoryAssetsToBeAmortizedBeforeTaxAbstract" xlink:label="Locator_exc_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeAndRegulatoryAssetsToBeAmortizedBeforeTaxAbstract_2389"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeAndRegulatoryAssetsAmortizationOfNetTransitionAssetObligation" xlink:label="Locator_exc_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeAndRegulatoryAssetsAmortizationOfNetTransitionAssetObligation_2390"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeAndRegulatoryAssetsToBeAmortizedBeforeTaxAbstract_2389" xlink:to="Locator_exc_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeAndRegulatoryAssetsAmortizationOfNetTransitionAssetObligation_2390" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeAndRegulatoryAssetsToBeAmortizedBeforeTaxAbstract" xlink:label="Locator_exc_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeAndRegulatoryAssetsToBeAmortizedBeforeTaxAbstract_2391"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeAndRegulatoryAssetsAmortizationOfPriorServiceCost" xlink:label="Locator_exc_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeAndRegulatoryAssetsAmortizationOfPriorServiceCost_2392"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeAndRegulatoryAssetsToBeAmortizedBeforeTaxAbstract_2391" xlink:to="Locator_exc_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeAndRegulatoryAssetsAmortizationOfPriorServiceCost_2392" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeAndRegulatoryAssetsToBeAmortizedBeforeTaxAbstract" xlink:label="Locator_exc_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeAndRegulatoryAssetsToBeAmortizedBeforeTaxAbstract_2393"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeAndRegulatoryAssetsAmortizationOfNetGainsLosses" xlink:label="Locator_exc_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeAndRegulatoryAssetsAmortizationOfNetGainsLosses_2394"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeAndRegulatoryAssetsToBeAmortizedBeforeTaxAbstract_2393" xlink:to="Locator_exc_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeAndRegulatoryAssetsAmortizationOfNetGainsLosses_2394" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeAndRegulatoryAssetsToBeAmortizedBeforeTaxAbstract" xlink:label="Locator_exc_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeAndRegulatoryAssetsToBeAmortizedBeforeTaxAbstract_2395"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanAmountsThatWillBeAmortizedFromAccumulatedOtherComprehensiveIncomeLossAndRegulatoryAssetsInNextFiscalYear" xlink:label="Locator_exc_DefinedBenefitPlanAmountsThatWillBeAmortizedFromAccumulatedOtherComprehensiveIncomeLossAndRegulatoryAssetsInNextFiscalYear_2396"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeAndRegulatoryAssetsToBeAmortizedBeforeTaxAbstract_2395" xlink:to="Locator_exc_DefinedBenefitPlanAmountsThatWillBeAmortizedFromAccumulatedOtherComprehensiveIncomeLossAndRegulatoryAssetsInNextFiscalYear_2396" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeAndRegulatoryAssetsToBeAmortizedBeforeTaxAbstract" xlink:label="Locator_exc_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeAndRegulatoryAssetsToBeAmortizedBeforeTaxAbstract_2397"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanAmountsThatWillBeAmortizedFromAccumulatedOtherComprehensiveIncomeLossInNextFiscalYear" xlink:label="Locator_us-gaap_DefinedBenefitPlanAmountsThatWillBeAmortizedFromAccumulatedOtherComprehensiveIncomeLossInNextFiscalYear_2398"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeAndRegulatoryAssetsToBeAmortizedBeforeTaxAbstract_2397" xlink:to="Locator_us-gaap_DefinedBenefitPlanAmountsThatWillBeAmortizedFromAccumulatedOtherComprehensiveIncomeLossInNextFiscalYear_2398" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeAndRegulatoryAssetsToBeAmortizedBeforeTaxAbstract" xlink:label="Locator_exc_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeAndRegulatoryAssetsToBeAmortizedBeforeTaxAbstract_2399"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanAmountsThatWillBeAmortizedFromRegulatoryAssetsInNextFiscalYear" xlink:label="Locator_exc_DefinedBenefitPlanAmountsThatWillBeAmortizedFromRegulatoryAssetsInNextFiscalYear_2400"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeAndRegulatoryAssetsToBeAmortizedBeforeTaxAbstract_2399" xlink:to="Locator_exc_DefinedBenefitPlanAmountsThatWillBeAmortizedFromRegulatoryAssetsInNextFiscalYear_2400" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanDisclosureLineItems" xlink:label="Locator_us-gaap_DefinedBenefitPlanDisclosureLineItems_2401"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PensionAndOtherPostretirementBenefitContributionsAbstract" xlink:label="Locator_us-gaap_PensionAndOtherPostretirementBenefitContributionsAbstract_2402"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DefinedBenefitPlanDisclosureLineItems_2401" xlink:to="Locator_us-gaap_PensionAndOtherPostretirementBenefitContributionsAbstract_2402" order="10.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PensionAndOtherPostretirementBenefitContributionsAbstract" xlink:label="Locator_us-gaap_PensionAndOtherPostretirementBenefitContributionsAbstract_2403"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PensionAndOtherPostretirementBenefitContributions" xlink:label="Locator_us-gaap_PensionAndOtherPostretirementBenefitContributions_2404"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_PensionAndOtherPostretirementBenefitContributionsAbstract_2403" xlink:to="Locator_us-gaap_PensionAndOtherPostretirementBenefitContributions_2404" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PensionAndOtherPostretirementBenefitContributionsAbstract" xlink:label="Locator_us-gaap_PensionAndOtherPostretirementBenefitContributionsAbstract_2405"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FederalSubsidyPaymentsReceivedNotIncludedInContributions" xlink:label="Locator_exc_FederalSubsidyPaymentsReceivedNotIncludedInContributions_2406"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_PensionAndOtherPostretirementBenefitContributionsAbstract_2405" xlink:to="Locator_exc_FederalSubsidyPaymentsReceivedNotIncludedInContributions_2406" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PensionAndOtherPostretirementBenefitContributionsAbstract" xlink:label="Locator_us-gaap_PensionAndOtherPostretirementBenefitContributionsAbstract_2407"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DeferredCompensationArrangementWithIndividualCompensationExpense" xlink:label="Locator_us-gaap_DeferredCompensationArrangementWithIndividualCompensationExpense_2408"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_PensionAndOtherPostretirementBenefitContributionsAbstract_2407" xlink:to="Locator_us-gaap_DeferredCompensationArrangementWithIndividualCompensationExpense_2408" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanDisclosureLineItems" xlink:label="Locator_us-gaap_DefinedBenefitPlanDisclosureLineItems_2409"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanEstimatedFutureBenefitPaymentsAbstract" xlink:label="Locator_us-gaap_DefinedBenefitPlanEstimatedFutureBenefitPaymentsAbstract_2410"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DefinedBenefitPlanDisclosureLineItems_2409" xlink:to="Locator_us-gaap_DefinedBenefitPlanEstimatedFutureBenefitPaymentsAbstract_2410" order="11.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanEstimatedFutureBenefitPaymentsAbstract" xlink:label="Locator_us-gaap_DefinedBenefitPlanEstimatedFutureBenefitPaymentsAbstract_2411"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsInYearOne" xlink:label="Locator_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsInYearOne_2412"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DefinedBenefitPlanEstimatedFutureBenefitPaymentsAbstract_2411" xlink:to="Locator_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsInYearOne_2412" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanEstimatedFutureBenefitPaymentsAbstract" xlink:label="Locator_us-gaap_DefinedBenefitPlanEstimatedFutureBenefitPaymentsAbstract_2413"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsInYearTwo" xlink:label="Locator_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsInYearTwo_2414"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DefinedBenefitPlanEstimatedFutureBenefitPaymentsAbstract_2413" xlink:to="Locator_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsInYearTwo_2414" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanEstimatedFutureBenefitPaymentsAbstract" xlink:label="Locator_us-gaap_DefinedBenefitPlanEstimatedFutureBenefitPaymentsAbstract_2415"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsInYearThree" xlink:label="Locator_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsInYearThree_2416"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DefinedBenefitPlanEstimatedFutureBenefitPaymentsAbstract_2415" xlink:to="Locator_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsInYearThree_2416" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanEstimatedFutureBenefitPaymentsAbstract" xlink:label="Locator_us-gaap_DefinedBenefitPlanEstimatedFutureBenefitPaymentsAbstract_2417"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsInYearFour" xlink:label="Locator_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsInYearFour_2418"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DefinedBenefitPlanEstimatedFutureBenefitPaymentsAbstract_2417" xlink:to="Locator_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsInYearFour_2418" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanEstimatedFutureBenefitPaymentsAbstract" xlink:label="Locator_us-gaap_DefinedBenefitPlanEstimatedFutureBenefitPaymentsAbstract_2419"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsInYearFive" xlink:label="Locator_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsInYearFive_2420"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DefinedBenefitPlanEstimatedFutureBenefitPaymentsAbstract_2419" xlink:to="Locator_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsInYearFive_2420" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanEstimatedFutureBenefitPaymentsAbstract" xlink:label="Locator_us-gaap_DefinedBenefitPlanEstimatedFutureBenefitPaymentsAbstract_2421"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsInFiveFiscalYearsThereafter" xlink:label="Locator_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsInFiveFiscalYearsThereafter_2422"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DefinedBenefitPlanEstimatedFutureBenefitPaymentsAbstract_2421" xlink:to="Locator_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsInFiveFiscalYearsThereafter_2422" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanEstimatedFutureBenefitPaymentsAbstract" xlink:label="Locator_us-gaap_DefinedBenefitPlanEstimatedFutureBenefitPaymentsAbstract_2423"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanExpectedFutureBenefitPaymentsTotal" xlink:label="Locator_exc_DefinedBenefitPlanExpectedFutureBenefitPaymentsTotal_2424"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DefinedBenefitPlanEstimatedFutureBenefitPaymentsAbstract_2423" xlink:to="Locator_exc_DefinedBenefitPlanExpectedFutureBenefitPaymentsTotal_2424" order="7.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanDisclosureLineItems" xlink:label="Locator_us-gaap_DefinedBenefitPlanDisclosureLineItems_2425"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DisclosureOfExpectedGrossPrescriptionDrugSubsidyReceiptsAbstract" xlink:label="Locator_us-gaap_DisclosureOfExpectedGrossPrescriptionDrugSubsidyReceiptsAbstract_2426"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DefinedBenefitPlanDisclosureLineItems_2425" xlink:to="Locator_us-gaap_DisclosureOfExpectedGrossPrescriptionDrugSubsidyReceiptsAbstract_2426" order="12.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DisclosureOfExpectedGrossPrescriptionDrugSubsidyReceiptsAbstract" xlink:label="Locator_us-gaap_DisclosureOfExpectedGrossPrescriptionDrugSubsidyReceiptsAbstract_2427"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PrescriptionDrugSubsidyReceiptsYearOne" xlink:label="Locator_us-gaap_PrescriptionDrugSubsidyReceiptsYearOne_2428"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DisclosureOfExpectedGrossPrescriptionDrugSubsidyReceiptsAbstract_2427" xlink:to="Locator_us-gaap_PrescriptionDrugSubsidyReceiptsYearOne_2428" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DisclosureOfExpectedGrossPrescriptionDrugSubsidyReceiptsAbstract" xlink:label="Locator_us-gaap_DisclosureOfExpectedGrossPrescriptionDrugSubsidyReceiptsAbstract_2429"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PrescriptionDrugSubsidyReceiptsYearTwo" xlink:label="Locator_us-gaap_PrescriptionDrugSubsidyReceiptsYearTwo_2430"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DisclosureOfExpectedGrossPrescriptionDrugSubsidyReceiptsAbstract_2429" xlink:to="Locator_us-gaap_PrescriptionDrugSubsidyReceiptsYearTwo_2430" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DisclosureOfExpectedGrossPrescriptionDrugSubsidyReceiptsAbstract" xlink:label="Locator_us-gaap_DisclosureOfExpectedGrossPrescriptionDrugSubsidyReceiptsAbstract_2431"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PrescriptionDrugSubsidyReceiptsYearThree" xlink:label="Locator_us-gaap_PrescriptionDrugSubsidyReceiptsYearThree_2432"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DisclosureOfExpectedGrossPrescriptionDrugSubsidyReceiptsAbstract_2431" xlink:to="Locator_us-gaap_PrescriptionDrugSubsidyReceiptsYearThree_2432" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DisclosureOfExpectedGrossPrescriptionDrugSubsidyReceiptsAbstract" xlink:label="Locator_us-gaap_DisclosureOfExpectedGrossPrescriptionDrugSubsidyReceiptsAbstract_2433"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PrescriptionDrugSubsidyReceiptsYearFour" xlink:label="Locator_us-gaap_PrescriptionDrugSubsidyReceiptsYearFour_2434"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DisclosureOfExpectedGrossPrescriptionDrugSubsidyReceiptsAbstract_2433" xlink:to="Locator_us-gaap_PrescriptionDrugSubsidyReceiptsYearFour_2434" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DisclosureOfExpectedGrossPrescriptionDrugSubsidyReceiptsAbstract" xlink:label="Locator_us-gaap_DisclosureOfExpectedGrossPrescriptionDrugSubsidyReceiptsAbstract_2435"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PrescriptionDrugSubsidyReceiptsYearFive" xlink:label="Locator_us-gaap_PrescriptionDrugSubsidyReceiptsYearFive_2436"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DisclosureOfExpectedGrossPrescriptionDrugSubsidyReceiptsAbstract_2435" xlink:to="Locator_us-gaap_PrescriptionDrugSubsidyReceiptsYearFive_2436" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DisclosureOfExpectedGrossPrescriptionDrugSubsidyReceiptsAbstract" xlink:label="Locator_us-gaap_DisclosureOfExpectedGrossPrescriptionDrugSubsidyReceiptsAbstract_2437"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PrescriptionDrugSubsidyReceiptsFiveFiscalYearsThereafter" xlink:label="Locator_us-gaap_PrescriptionDrugSubsidyReceiptsFiveFiscalYearsThereafter_2438"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DisclosureOfExpectedGrossPrescriptionDrugSubsidyReceiptsAbstract_2437" xlink:to="Locator_us-gaap_PrescriptionDrugSubsidyReceiptsFiveFiscalYearsThereafter_2438" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanDisclosureLineItems" xlink:label="Locator_us-gaap_DefinedBenefitPlanDisclosureLineItems_2439"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanExpenseIncludedInCapitalAndOperationalAndMaintenanceExpenseAbstract" xlink:label="Locator_exc_DefinedBenefitPlanExpenseIncludedInCapitalAndOperationalAndMaintenanceExpenseAbstract_2440"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DefinedBenefitPlanDisclosureLineItems_2439" xlink:to="Locator_exc_DefinedBenefitPlanExpenseIncludedInCapitalAndOperationalAndMaintenanceExpenseAbstract_2440" order="13.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanExpenseIncludedInCapitalAndOperationalAndMaintenanceExpenseAbstract" xlink:label="Locator_exc_DefinedBenefitPlanExpenseIncludedInCapitalAndOperationalAndMaintenanceExpenseAbstract_2441"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PensionAndOtherPostretirementBenefitExpenseIncludedInCapitalAndOperatingAndMaintenanceExpense" xlink:label="Locator_exc_PensionAndOtherPostretirementBenefitExpenseIncludedInCapitalAndOperatingAndMaintenanceExpense_2442"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_DefinedBenefitPlanExpenseIncludedInCapitalAndOperationalAndMaintenanceExpenseAbstract_2441" xlink:to="Locator_exc_PensionAndOtherPostretirementBenefitExpenseIncludedInCapitalAndOperatingAndMaintenanceExpense_2442" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanDisclosureLineItems" xlink:label="Locator_us-gaap_DefinedBenefitPlanDisclosureLineItems_2443"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocationsAbstract" xlink:label="Locator_us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocationsAbstract_2444"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DefinedBenefitPlanDisclosureLineItems_2443" xlink:to="Locator_us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocationsAbstract_2444" order="14.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocationsAbstract" xlink:label="Locator_us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocationsAbstract_2445"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanEquitySecurities" xlink:label="Locator_us-gaap_DefinedBenefitPlanEquitySecurities_2446"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocationsAbstract_2445" xlink:to="Locator_us-gaap_DefinedBenefitPlanEquitySecurities_2446" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocationsAbstract" xlink:label="Locator_us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocationsAbstract_2447"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanTargetAllocationPercentageOfAssetsEquitySecuritiesRangeMinimum" xlink:label="Locator_us-gaap_DefinedBenefitPlanTargetAllocationPercentageOfAssetsEquitySecuritiesRangeMinimum_2448"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocationsAbstract_2447" xlink:to="Locator_us-gaap_DefinedBenefitPlanTargetAllocationPercentageOfAssetsEquitySecuritiesRangeMinimum_2448" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocationsAbstract" xlink:label="Locator_us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocationsAbstract_2449"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanTargetAllocationPercentageOfAssetsEquitySecuritiesRangeMaximum" xlink:label="Locator_us-gaap_DefinedBenefitPlanTargetAllocationPercentageOfAssetsEquitySecuritiesRangeMaximum_2450"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocationsAbstract_2449" xlink:to="Locator_us-gaap_DefinedBenefitPlanTargetAllocationPercentageOfAssetsEquitySecuritiesRangeMaximum_2450" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocationsAbstract" xlink:label="Locator_us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocationsAbstract_2451"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanDebtSecurities" xlink:label="Locator_us-gaap_DefinedBenefitPlanDebtSecurities_2452"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocationsAbstract_2451" xlink:to="Locator_us-gaap_DefinedBenefitPlanDebtSecurities_2452" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocationsAbstract" xlink:label="Locator_us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocationsAbstract_2453"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanTargetAllocationPercentageOfAssetsDebtSecuritiesRangeMinimum" xlink:label="Locator_us-gaap_DefinedBenefitPlanTargetAllocationPercentageOfAssetsDebtSecuritiesRangeMinimum_2454"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocationsAbstract_2453" xlink:to="Locator_us-gaap_DefinedBenefitPlanTargetAllocationPercentageOfAssetsDebtSecuritiesRangeMinimum_2454" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocationsAbstract" xlink:label="Locator_us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocationsAbstract_2455"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanTargetAllocationPercentageOfAssetsDebtSecuritiesRangeMaximum" xlink:label="Locator_us-gaap_DefinedBenefitPlanTargetAllocationPercentageOfAssetsDebtSecuritiesRangeMaximum_2456"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocationsAbstract_2455" xlink:to="Locator_us-gaap_DefinedBenefitPlanTargetAllocationPercentageOfAssetsDebtSecuritiesRangeMaximum_2456" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocationsAbstract" xlink:label="Locator_us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocationsAbstract_2457"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanAlternativeSecurities" xlink:label="Locator_exc_DefinedBenefitPlanAlternativeSecurities_2458"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocationsAbstract_2457" xlink:to="Locator_exc_DefinedBenefitPlanAlternativeSecurities_2458" order="7.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocationsAbstract" xlink:label="Locator_us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocationsAbstract_2459"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanTargetAllocationPercentageOfAssetsAlternativeSecuritiesRangeMinimum" xlink:label="Locator_exc_DefinedBenefitPlanTargetAllocationPercentageOfAssetsAlternativeSecuritiesRangeMinimum_2460"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocationsAbstract_2459" xlink:to="Locator_exc_DefinedBenefitPlanTargetAllocationPercentageOfAssetsAlternativeSecuritiesRangeMinimum_2460" order="8.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocationsAbstract" xlink:label="Locator_us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocationsAbstract_2461"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanTargetAllocationPercentageOfAssetsAlternativeSecuritiesRangeMaximum" xlink:label="Locator_exc_DefinedBenefitPlanTargetAllocationPercentageOfAssetsAlternativeSecuritiesRangeMaximum_2462"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocationsAbstract_2461" xlink:to="Locator_exc_DefinedBenefitPlanTargetAllocationPercentageOfAssetsAlternativeSecuritiesRangeMaximum_2462" order="9.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocationsAbstract" xlink:label="Locator_us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocationsAbstract_2463"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations" xlink:label="Locator_us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations_2464"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocationsAbstract_2463" xlink:to="Locator_us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations_2464" order="10.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanDisclosureLineItems" xlink:label="Locator_us-gaap_DefinedBenefitPlanDisclosureLineItems_2465"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_InvestmentStrategyAbstract" xlink:label="Locator_exc_InvestmentStrategyAbstract_2466"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DefinedBenefitPlanDisclosureLineItems_2465" xlink:to="Locator_exc_InvestmentStrategyAbstract_2466" order="15.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_InvestmentStrategyAbstract" xlink:label="Locator_exc_InvestmentStrategyAbstract_2467"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanPlannedTargetAllocationPercentageOfAssetsEquitySecurities" xlink:label="Locator_exc_DefinedBenefitPlanPlannedTargetAllocationPercentageOfAssetsEquitySecurities_2468"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_InvestmentStrategyAbstract_2467" xlink:to="Locator_exc_DefinedBenefitPlanPlannedTargetAllocationPercentageOfAssetsEquitySecurities_2468" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_InvestmentStrategyAbstract" xlink:label="Locator_exc_InvestmentStrategyAbstract_2469"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanPlannedTargetAllocationPercentageOfAssetsDebtSecurities" xlink:label="Locator_exc_DefinedBenefitPlanPlannedTargetAllocationPercentageOfAssetsDebtSecurities_2470"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_InvestmentStrategyAbstract_2469" xlink:to="Locator_exc_DefinedBenefitPlanPlannedTargetAllocationPercentageOfAssetsDebtSecurities_2470" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_InvestmentStrategyAbstract" xlink:label="Locator_exc_InvestmentStrategyAbstract_2471"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanPlannedTargetAllocationPercentageOfAssetsAlternativeInvestments" xlink:label="Locator_exc_DefinedBenefitPlanPlannedTargetAllocationPercentageOfAssetsAlternativeInvestments_2472"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_InvestmentStrategyAbstract_2471" xlink:to="Locator_exc_DefinedBenefitPlanPlannedTargetAllocationPercentageOfAssetsAlternativeInvestments_2472" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_InvestmentStrategyAbstract" xlink:label="Locator_exc_InvestmentStrategyAbstract_2473"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssetsNextFiscalYear" xlink:label="Locator_exc_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssetsNextFiscalYear_2474"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_InvestmentStrategyAbstract_2473" xlink:to="Locator_exc_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssetsNextFiscalYear_2474" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanDisclosureLineItems" xlink:label="Locator_us-gaap_DefinedBenefitPlanDisclosureLineItems_2475"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedContributionPlanContributionsByEmployerAbstract" xlink:label="Locator_exc_DefinedContributionPlanContributionsByEmployerAbstract_2476"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DefinedBenefitPlanDisclosureLineItems_2475" xlink:to="Locator_exc_DefinedContributionPlanContributionsByEmployerAbstract_2476" order="16.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedContributionPlanContributionsByEmployerAbstract" xlink:label="Locator_exc_DefinedContributionPlanContributionsByEmployerAbstract_2477"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedContributionPlanContributionsByEmployer" xlink:label="Locator_exc_DefinedContributionPlanContributionsByEmployer_2478"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_DefinedContributionPlanContributionsByEmployerAbstract_2477" xlink:to="Locator_exc_DefinedContributionPlanContributionsByEmployer_2478" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanDisclosureLineItems" xlink:label="Locator_us-gaap_DefinedBenefitPlanDisclosureLineItems_2479"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanBenefitObligationPeriodIncreaseDecreaseValuationAdjustmentAbstract" xlink:label="Locator_exc_DefinedBenefitPlanBenefitObligationPeriodIncreaseDecreaseValuationAdjustmentAbstract_2480"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DefinedBenefitPlanDisclosureLineItems_2479" xlink:to="Locator_exc_DefinedBenefitPlanBenefitObligationPeriodIncreaseDecreaseValuationAdjustmentAbstract_2480" order="17.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanBenefitObligationPeriodIncreaseDecreaseValuationAdjustmentAbstract" xlink:label="Locator_exc_DefinedBenefitPlanBenefitObligationPeriodIncreaseDecreaseValuationAdjustmentAbstract_2481"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanValuationAdjustment" xlink:label="Locator_exc_DefinedBenefitPlanValuationAdjustment_2482"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_DefinedBenefitPlanBenefitObligationPeriodIncreaseDecreaseValuationAdjustmentAbstract_2481" xlink:to="Locator_exc_DefinedBenefitPlanValuationAdjustment_2482" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanBenefitObligationPeriodIncreaseDecreaseValuationAdjustmentAbstract" xlink:label="Locator_exc_DefinedBenefitPlanBenefitObligationPeriodIncreaseDecreaseValuationAdjustmentAbstract_2483"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanCurtailment" xlink:label="Locator_exc_DefinedBenefitPlanCurtailment_2484"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_DefinedBenefitPlanBenefitObligationPeriodIncreaseDecreaseValuationAdjustmentAbstract_2483" xlink:to="Locator_exc_DefinedBenefitPlanCurtailment_2484" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanBenefitObligationPeriodIncreaseDecreaseValuationAdjustmentAbstract" xlink:label="Locator_exc_DefinedBenefitPlanBenefitObligationPeriodIncreaseDecreaseValuationAdjustmentAbstract_2485"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPeriodIncreaseDecrease" xlink:label="Locator_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPeriodIncreaseDecrease_2486"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_DefinedBenefitPlanBenefitObligationPeriodIncreaseDecreaseValuationAdjustmentAbstract_2485" xlink:to="Locator_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPeriodIncreaseDecrease_2486" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanBenefitObligationPeriodIncreaseDecreaseValuationAdjustmentAbstract" xlink:label="Locator_exc_DefinedBenefitPlanBenefitObligationPeriodIncreaseDecreaseValuationAdjustmentAbstract_2487"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OtherComprehensiveIncomeDefinedBenefitPlansCurtailmentNetOfTax" xlink:label="Locator_exc_OtherComprehensiveIncomeDefinedBenefitPlansCurtailmentNetOfTax_2488"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_DefinedBenefitPlanBenefitObligationPeriodIncreaseDecreaseValuationAdjustmentAbstract_2487" xlink:to="Locator_exc_OtherComprehensiveIncomeDefinedBenefitPlansCurtailmentNetOfTax_2488" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanBenefitObligationPeriodIncreaseDecreaseValuationAdjustmentAbstract" xlink:label="Locator_exc_DefinedBenefitPlanBenefitObligationPeriodIncreaseDecreaseValuationAdjustmentAbstract_2489"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanRegulatoryAssetLiabilityCensusUpdatePensionOpeb" xlink:label="Locator_exc_DefinedBenefitPlanRegulatoryAssetLiabilityCensusUpdatePensionOpeb_2490"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_DefinedBenefitPlanBenefitObligationPeriodIncreaseDecreaseValuationAdjustmentAbstract_2489" xlink:to="Locator_exc_DefinedBenefitPlanRegulatoryAssetLiabilityCensusUpdatePensionOpeb_2490" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanBenefitObligationPeriodIncreaseDecreaseValuationAdjustmentAbstract" xlink:label="Locator_exc_DefinedBenefitPlanBenefitObligationPeriodIncreaseDecreaseValuationAdjustmentAbstract_2491"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanOtherPostretirementBenefitObligationUpdatePensionOpeb" xlink:label="Locator_exc_DefinedBenefitPlanOtherPostretirementBenefitObligationUpdatePensionOpeb_2492"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_DefinedBenefitPlanBenefitObligationPeriodIncreaseDecreaseValuationAdjustmentAbstract_2491" xlink:to="Locator_exc_DefinedBenefitPlanOtherPostretirementBenefitObligationUpdatePensionOpeb_2492" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanBenefitObligationPeriodIncreaseDecreaseValuationAdjustmentAbstract" xlink:label="Locator_exc_DefinedBenefitPlanBenefitObligationPeriodIncreaseDecreaseValuationAdjustmentAbstract_2493"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanRegulatoryAssetLiabilityCurtailment" xlink:label="Locator_exc_DefinedBenefitPlanRegulatoryAssetLiabilityCurtailment_2494"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_DefinedBenefitPlanBenefitObligationPeriodIncreaseDecreaseValuationAdjustmentAbstract_2493" xlink:to="Locator_exc_DefinedBenefitPlanRegulatoryAssetLiabilityCurtailment_2494" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanBenefitObligationPeriodIncreaseDecreaseValuationAdjustmentAbstract" xlink:label="Locator_exc_DefinedBenefitPlanBenefitObligationPeriodIncreaseDecreaseValuationAdjustmentAbstract_2495"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanRegulatoryAssetLiabilityTerminationBenefit" xlink:label="Locator_exc_DefinedBenefitPlanRegulatoryAssetLiabilityTerminationBenefit_2496"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_DefinedBenefitPlanBenefitObligationPeriodIncreaseDecreaseValuationAdjustmentAbstract_2495" xlink:to="Locator_exc_DefinedBenefitPlanRegulatoryAssetLiabilityTerminationBenefit_2496" order="7.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanBenefitObligationPeriodIncreaseDecreaseValuationAdjustmentAbstract" xlink:label="Locator_exc_DefinedBenefitPlanBenefitObligationPeriodIncreaseDecreaseValuationAdjustmentAbstract_2497"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanRegulatoryAssetLiabilityTerminationBenefitBilled" xlink:label="Locator_exc_DefinedBenefitPlanRegulatoryAssetLiabilityTerminationBenefitBilled_2498"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_DefinedBenefitPlanBenefitObligationPeriodIncreaseDecreaseValuationAdjustmentAbstract_2497" xlink:to="Locator_exc_DefinedBenefitPlanRegulatoryAssetLiabilityTerminationBenefitBilled_2498" order="8.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanBenefitObligationPeriodIncreaseDecreaseValuationAdjustmentAbstract" xlink:label="Locator_exc_DefinedBenefitPlanBenefitObligationPeriodIncreaseDecreaseValuationAdjustmentAbstract_2499"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanRegulatoryAssetLiabilityTerminationBenefitTotal" xlink:label="Locator_exc_DefinedBenefitPlanRegulatoryAssetLiabilityTerminationBenefitTotal_2500"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_DefinedBenefitPlanBenefitObligationPeriodIncreaseDecreaseValuationAdjustmentAbstract_2499" xlink:to="Locator_exc_DefinedBenefitPlanRegulatoryAssetLiabilityTerminationBenefitTotal_2500" order="9.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanBenefitObligationPeriodIncreaseDecreaseValuationAdjustmentAbstract" xlink:label="Locator_exc_DefinedBenefitPlanBenefitObligationPeriodIncreaseDecreaseValuationAdjustmentAbstract_2501"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRateCurtailment" xlink:label="Locator_exc_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRateCurtailment_2502"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_DefinedBenefitPlanBenefitObligationPeriodIncreaseDecreaseValuationAdjustmentAbstract_2501" xlink:to="Locator_exc_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRateCurtailment_2502" order="10.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanBenefitObligationPeriodIncreaseDecreaseValuationAdjustmentAbstract" xlink:label="Locator_exc_DefinedBenefitPlanBenefitObligationPeriodIncreaseDecreaseValuationAdjustmentAbstract_2503"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRatePostretirementObligations" xlink:label="Locator_exc_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRatePostretirementObligations_2504"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_DefinedBenefitPlanBenefitObligationPeriodIncreaseDecreaseValuationAdjustmentAbstract_2503" xlink:to="Locator_exc_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRatePostretirementObligations_2504" order="11.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanDisclosureLineItems" xlink:label="Locator_us-gaap_DefinedBenefitPlanDisclosureLineItems_2505"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanBenefitObligationPeriodIncreaseDecreaseDesignChangesAbstract" xlink:label="Locator_exc_DefinedBenefitPlanBenefitObligationPeriodIncreaseDecreaseDesignChangesAbstract_2506"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DefinedBenefitPlanDisclosureLineItems_2505" xlink:to="Locator_exc_DefinedBenefitPlanBenefitObligationPeriodIncreaseDecreaseDesignChangesAbstract_2506" order="18.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanBenefitObligationPeriodIncreaseDecreaseDesignChangesAbstract" xlink:label="Locator_exc_DefinedBenefitPlanBenefitObligationPeriodIncreaseDecreaseDesignChangesAbstract_2507"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanDesignChanges" xlink:label="Locator_exc_DefinedBenefitPlanDesignChanges_2508"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_DefinedBenefitPlanBenefitObligationPeriodIncreaseDecreaseDesignChangesAbstract_2507" xlink:to="Locator_exc_DefinedBenefitPlanDesignChanges_2508" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanBenefitObligationPeriodIncreaseDecreaseDesignChangesAbstract" xlink:label="Locator_exc_DefinedBenefitPlanBenefitObligationPeriodIncreaseDecreaseDesignChangesAbstract_2509"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OtherComprehensiveIncomeDefinedBenefitPlansDesignChangesNetOfTax" xlink:label="Locator_exc_OtherComprehensiveIncomeDefinedBenefitPlansDesignChangesNetOfTax_2510"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_DefinedBenefitPlanBenefitObligationPeriodIncreaseDecreaseDesignChangesAbstract_2509" xlink:to="Locator_exc_OtherComprehensiveIncomeDefinedBenefitPlansDesignChangesNetOfTax_2510" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanBenefitObligationPeriodIncreaseDecreaseDesignChangesAbstract" xlink:label="Locator_exc_DefinedBenefitPlanBenefitObligationPeriodIncreaseDecreaseDesignChangesAbstract_2511"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanRegulatoryAssetLiabilityDesignChangeOpeb" xlink:label="Locator_exc_DefinedBenefitPlanRegulatoryAssetLiabilityDesignChangeOpeb_2512"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_DefinedBenefitPlanBenefitObligationPeriodIncreaseDecreaseDesignChangesAbstract_2511" xlink:to="Locator_exc_DefinedBenefitPlanRegulatoryAssetLiabilityDesignChangeOpeb_2512" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanBenefitObligationPeriodIncreaseDecreaseDesignChangesAbstract" xlink:label="Locator_exc_DefinedBenefitPlanBenefitObligationPeriodIncreaseDecreaseDesignChangesAbstract_2513"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRateDesignChanges" xlink:label="Locator_exc_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRateDesignChanges_2514"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_DefinedBenefitPlanBenefitObligationPeriodIncreaseDecreaseDesignChangesAbstract_2513" xlink:to="Locator_exc_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRateDesignChanges_2514" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanDisclosureLineItems" xlink:label="Locator_us-gaap_DefinedBenefitPlanDisclosureLineItems_2515"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanSettlementChargesAbstract" xlink:label="Locator_exc_DefinedBenefitPlanSettlementChargesAbstract_2516"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DefinedBenefitPlanDisclosureLineItems_2515" xlink:to="Locator_exc_DefinedBenefitPlanSettlementChargesAbstract_2516" order="19.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanSettlementChargesAbstract" xlink:label="Locator_exc_DefinedBenefitPlanSettlementChargesAbstract_2517"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanSettlementCharges" xlink:label="Locator_exc_DefinedBenefitPlanSettlementCharges_2518"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_DefinedBenefitPlanSettlementChargesAbstract_2517" xlink:to="Locator_exc_DefinedBenefitPlanSettlementCharges_2518" order="0.0" xbrldt:usable="true"/> |
| | </definitionLink> |
| <definitionLink xlink:type="extended" xlink:role="http://exeloncorp.com/role/SignificantAccountingPoliciesDetails"> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_2691"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_2692"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_dei_LegalEntityAxis_2691" xlink:to="Locator_dei_EntityDomain_2692" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_2701"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PettMember" xlink:label="Locator_exc_PettMember_2702"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_2701" xlink:to="Locator_exc_PettMember_2702" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_2693"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ExelonGenerationCoLLCMember" xlink:label="Locator_exc_ExelonGenerationCoLLCMember_2694"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_2693" xlink:to="Locator_exc_ExelonGenerationCoLLCMember_2694" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_2695"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CommonwealthEdisonCoMember" xlink:label="Locator_exc_CommonwealthEdisonCoMember_2696"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_2695" xlink:to="Locator_exc_CommonwealthEdisonCoMember_2696" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_2697"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PecoEnergyCoMember" xlink:label="Locator_exc_PecoEnergyCoMember_2698"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_2697" xlink:to="Locator_exc_PecoEnergyCoMember_2698" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_2699"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BaltimoreGasAndElectricCompanyMember" xlink:label="Locator_exc_BaltimoreGasAndElectricCompanyMember_2700"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_2699" xlink:to="Locator_exc_BaltimoreGasAndElectricCompanyMember_2700" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SignificantAccountingPoliciesAdditionalNarrativeInformationLineItems" xlink:label="Locator_exc_SignificantAccountingPoliciesAdditionalNarrativeInformationLineItems_2623"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SignificantAccountingPoliciesAdditionalNarrativeInformationTable" xlink:label="Locator_exc_SignificantAccountingPoliciesAdditionalNarrativeInformationTable_2624"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="Locator_exc_SignificantAccountingPoliciesAdditionalNarrativeInformationLineItems_2623" xlink:to="Locator_exc_SignificantAccountingPoliciesAdditionalNarrativeInformationTable_2624" order="0.5" xbrldt:contextElement="segment" xbrldt:closed="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SignificantAccountingPoliciesAdditionalNarrativeInformationTable" xlink:label="Locator_exc_SignificantAccountingPoliciesAdditionalNarrativeInformationTable_2685"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_2686"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_exc_SignificantAccountingPoliciesAdditionalNarrativeInformationTable_2685" xlink:to="Locator_dei_LegalEntityAxis_2686" order="0.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SignificantAccountingPoliciesAdditionalNarrativeInformationLineItems" xlink:label="Locator_exc_SignificantAccountingPoliciesAdditionalNarrativeInformationLineItems_2703"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ConsolidationPercentagesDetailTaggingAbstract" xlink:label="Locator_exc_ConsolidationPercentagesDetailTaggingAbstract_2704"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_SignificantAccountingPoliciesAdditionalNarrativeInformationLineItems_2703" xlink:to="Locator_exc_ConsolidationPercentagesDetailTaggingAbstract_2704" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ConsolidationPercentagesDetailTaggingAbstract" xlink:label="Locator_exc_ConsolidationPercentagesDetailTaggingAbstract_2705"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ConsolidatedSubsidiaryOwnershipPercentage" xlink:label="Locator_exc_ConsolidatedSubsidiaryOwnershipPercentage_2706"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_ConsolidationPercentagesDetailTaggingAbstract_2705" xlink:to="Locator_exc_ConsolidatedSubsidiaryOwnershipPercentage_2706" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ConsolidationPercentagesDetailTaggingAbstract" xlink:label="Locator_exc_ConsolidationPercentagesDetailTaggingAbstract_2707"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_EquityMethodInvestmentOwnershipPercentage" xlink:label="Locator_us-gaap_EquityMethodInvestmentOwnershipPercentage_2708"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_ConsolidationPercentagesDetailTaggingAbstract_2707" xlink:to="Locator_us-gaap_EquityMethodInvestmentOwnershipPercentage_2708" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ConsolidationPercentagesDetailTaggingAbstract" xlink:label="Locator_exc_ConsolidationPercentagesDetailTaggingAbstract_2709"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_SubsidiaryOfLimitedLiabilityCompanyOrLimitedPartnershipOwnershipInterest" xlink:label="Locator_us-gaap_SubsidiaryOfLimitedLiabilityCompanyOrLimitedPartnershipOwnershipInterest_2710"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_ConsolidationPercentagesDetailTaggingAbstract_2709" xlink:to="Locator_us-gaap_SubsidiaryOfLimitedLiabilityCompanyOrLimitedPartnershipOwnershipInterest_2710" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ConsolidationPercentagesDetailTaggingAbstract" xlink:label="Locator_exc_ConsolidationPercentagesDetailTaggingAbstract_2711"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_MinorityInterestOwnershipPercentageByParent" xlink:label="Locator_us-gaap_MinorityInterestOwnershipPercentageByParent_2712"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_ConsolidationPercentagesDetailTaggingAbstract_2711" xlink:to="Locator_us-gaap_MinorityInterestOwnershipPercentageByParent_2712" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ConsolidationPercentagesDetailTaggingAbstract" xlink:label="Locator_exc_ConsolidationPercentagesDetailTaggingAbstract_2713"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ConsolidatedSubsidiaryCommonStockOwnershipPercentage" xlink:label="Locator_exc_ConsolidatedSubsidiaryCommonStockOwnershipPercentage_2714"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_ConsolidationPercentagesDetailTaggingAbstract_2713" xlink:to="Locator_exc_ConsolidatedSubsidiaryCommonStockOwnershipPercentage_2714" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ConsolidationPercentagesDetailTaggingAbstract" xlink:label="Locator_exc_ConsolidationPercentagesDetailTaggingAbstract_2715"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_MinorityInterestUpperBound" xlink:label="Locator_exc_MinorityInterestUpperBound_2716"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_ConsolidationPercentagesDetailTaggingAbstract_2715" xlink:to="Locator_exc_MinorityInterestUpperBound_2716" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ConsolidationPercentagesDetailTaggingAbstract" xlink:label="Locator_exc_ConsolidationPercentagesDetailTaggingAbstract_2717"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SubsidiaryMinorityInterestUpperBound" xlink:label="Locator_exc_SubsidiaryMinorityInterestUpperBound_2718"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_ConsolidationPercentagesDetailTaggingAbstract_2717" xlink:to="Locator_exc_SubsidiaryMinorityInterestUpperBound_2718" order="7.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ConsolidationPercentagesDetailTaggingAbstract" xlink:label="Locator_exc_ConsolidationPercentagesDetailTaggingAbstract_2719"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_MinorityInterestPercent" xlink:label="Locator_exc_MinorityInterestPercent_2720"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_ConsolidationPercentagesDetailTaggingAbstract_2719" xlink:to="Locator_exc_MinorityInterestPercent_2720" order="8.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ConsolidationPercentagesDetailTaggingAbstract" xlink:label="Locator_exc_ConsolidationPercentagesDetailTaggingAbstract_2721"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ControllingFinancialInterest" xlink:label="Locator_exc_ControllingFinancialInterest_2722"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_ConsolidationPercentagesDetailTaggingAbstract_2721" xlink:to="Locator_exc_ControllingFinancialInterest_2722" order="9.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ConsolidationPercentagesDetailTaggingAbstract" xlink:label="Locator_exc_ConsolidationPercentagesDetailTaggingAbstract_2723"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OwnershipInterestUpperBound" xlink:label="Locator_exc_OwnershipInterestUpperBound_2724"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_ConsolidationPercentagesDetailTaggingAbstract_2723" xlink:to="Locator_exc_OwnershipInterestUpperBound_2724" order="10.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ConsolidationPercentagesDetailTaggingAbstract" xlink:label="Locator_exc_ConsolidationPercentagesDetailTaggingAbstract_2725"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OwnershipInterestLowerBound" xlink:label="Locator_exc_OwnershipInterestLowerBound_2726"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_ConsolidationPercentagesDetailTaggingAbstract_2725" xlink:to="Locator_exc_OwnershipInterestLowerBound_2726" order="11.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SignificantAccountingPoliciesAdditionalNarrativeInformationLineItems" xlink:label="Locator_exc_SignificantAccountingPoliciesAdditionalNarrativeInformationLineItems_2727"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_VariableInterestEntitiesDetailTaggingAbstract" xlink:label="Locator_exc_VariableInterestEntitiesDetailTaggingAbstract_2728"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_SignificantAccountingPoliciesAdditionalNarrativeInformationLineItems_2727" xlink:to="Locator_exc_VariableInterestEntitiesDetailTaggingAbstract_2728" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_VariableInterestEntitiesDetailTaggingAbstract" xlink:label="Locator_exc_VariableInterestEntitiesDetailTaggingAbstract_2729"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OwnershipPercentageOfWindProjects" xlink:label="Locator_exc_OwnershipPercentageOfWindProjects_2730"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_VariableInterestEntitiesDetailTaggingAbstract_2729" xlink:to="Locator_exc_OwnershipPercentageOfWindProjects_2730" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_VariableInterestEntitiesDetailTaggingAbstract" xlink:label="Locator_exc_VariableInterestEntitiesDetailTaggingAbstract_2731"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ProjectsWithNoncontrollingInterest" xlink:label="Locator_exc_ProjectsWithNoncontrollingInterest_2732"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_VariableInterestEntitiesDetailTaggingAbstract_2731" xlink:to="Locator_exc_ProjectsWithNoncontrollingInterest_2732" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_VariableInterestEntitiesDetailTaggingAbstract" xlink:label="Locator_exc_VariableInterestEntitiesDetailTaggingAbstract_2733"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ProjectsWithSignificantEconomicPower" xlink:label="Locator_exc_ProjectsWithSignificantEconomicPower_2734"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_VariableInterestEntitiesDetailTaggingAbstract_2733" xlink:to="Locator_exc_ProjectsWithSignificantEconomicPower_2734" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_VariableInterestEntitiesDetailTaggingAbstract" xlink:label="Locator_exc_VariableInterestEntitiesDetailTaggingAbstract_2735"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_MinorityInterestMinimumOwnershipPercentageByNoncontrollingOwners" xlink:label="Locator_exc_MinorityInterestMinimumOwnershipPercentageByNoncontrollingOwners_2736"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_VariableInterestEntitiesDetailTaggingAbstract_2735" xlink:to="Locator_exc_MinorityInterestMinimumOwnershipPercentageByNoncontrollingOwners_2736" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_VariableInterestEntitiesDetailTaggingAbstract" xlink:label="Locator_exc_VariableInterestEntitiesDetailTaggingAbstract_2737"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_MinorityInterestMaximumOwnershipPercentageByNoncontrollingOwners" xlink:label="Locator_exc_MinorityInterestMaximumOwnershipPercentageByNoncontrollingOwners_2738"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_VariableInterestEntitiesDetailTaggingAbstract_2737" xlink:to="Locator_exc_MinorityInterestMaximumOwnershipPercentageByNoncontrollingOwners_2738" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_VariableInterestEntitiesDetailTaggingAbstract" xlink:label="Locator_exc_VariableInterestEntitiesDetailTaggingAbstract_2739"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RecoveryStrandedCosts" xlink:label="Locator_us-gaap_RecoveryStrandedCosts_2740"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_VariableInterestEntitiesDetailTaggingAbstract_2739" xlink:to="Locator_us-gaap_RecoveryStrandedCosts_2740" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_VariableInterestEntitiesDetailTaggingAbstract" xlink:label="Locator_exc_VariableInterestEntitiesDetailTaggingAbstract_2741"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PaymentsToAcquireBusinessesAndInterestInAffiliates" xlink:label="Locator_us-gaap_PaymentsToAcquireBusinessesAndInterestInAffiliates_2742"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_VariableInterestEntitiesDetailTaggingAbstract_2741" xlink:to="Locator_us-gaap_PaymentsToAcquireBusinessesAndInterestInAffiliates_2742" order="7.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_VariableInterestEntitiesDetailTaggingAbstract" xlink:label="Locator_exc_VariableInterestEntitiesDetailTaggingAbstract_2743"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_TaxBenefitThreshold" xlink:label="Locator_exc_TaxBenefitThreshold_2744"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_VariableInterestEntitiesDetailTaggingAbstract_2743" xlink:to="Locator_exc_TaxBenefitThreshold_2744" order="8.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SignificantAccountingPoliciesAdditionalNarrativeInformationLineItems" xlink:label="Locator_exc_SignificantAccountingPoliciesAdditionalNarrativeInformationLineItems_2745"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NewSiteDevelopmentCostsAbstract" xlink:label="Locator_exc_NewSiteDevelopmentCostsAbstract_2746"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_SignificantAccountingPoliciesAdditionalNarrativeInformationLineItems_2745" xlink:to="Locator_exc_NewSiteDevelopmentCostsAbstract_2746" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NewSiteDevelopmentCostsAbstract" xlink:label="Locator_exc_NewSiteDevelopmentCostsAbstract_2747"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CapitalizedDevelopmentCosts" xlink:label="Locator_exc_CapitalizedDevelopmentCosts_2748"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_NewSiteDevelopmentCostsAbstract_2747" xlink:to="Locator_exc_CapitalizedDevelopmentCosts_2748" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NewSiteDevelopmentCostsAbstract" xlink:label="Locator_exc_NewSiteDevelopmentCostsAbstract_2749"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DevelopmentCostsExpensed" xlink:label="Locator_exc_DevelopmentCostsExpensed_2750"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_NewSiteDevelopmentCostsAbstract_2749" xlink:to="Locator_exc_DevelopmentCostsExpensed_2750" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SignificantAccountingPoliciesAdditionalNarrativeInformationLineItems" xlink:label="Locator_exc_SignificantAccountingPoliciesAdditionalNarrativeInformationLineItems_2751"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NuclearFuelAbstract" xlink:label="Locator_exc_NuclearFuelAbstract_2752"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_SignificantAccountingPoliciesAdditionalNarrativeInformationLineItems_2751" xlink:to="Locator_exc_NuclearFuelAbstract_2752" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NuclearFuelAbstract" xlink:label="Locator_exc_NuclearFuelAbstract_2753"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CostOfSpentNuclearFuelDisposal" xlink:label="Locator_exc_CostOfSpentNuclearFuelDisposal_2754"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_NuclearFuelAbstract_2753" xlink:to="Locator_exc_CostOfSpentNuclearFuelDisposal_2754" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SignificantAccountingPoliciesAdditionalNarrativeInformationLineItems" xlink:label="Locator_exc_SignificantAccountingPoliciesAdditionalNarrativeInformationLineItems_2755"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AssetRetirementObligationsPoliciesAbstract" xlink:label="Locator_exc_AssetRetirementObligationsPoliciesAbstract_2756"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_SignificantAccountingPoliciesAdditionalNarrativeInformationLineItems_2755" xlink:to="Locator_exc_AssetRetirementObligationsPoliciesAbstract_2756" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AssetRetirementObligationsPoliciesAbstract" xlink:label="Locator_exc_AssetRetirementObligationsPoliciesAbstract_2757"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_YearsBetweenDecommissioningStudies" xlink:label="Locator_exc_YearsBetweenDecommissioningStudies_2758"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_AssetRetirementObligationsPoliciesAbstract_2757" xlink:to="Locator_exc_YearsBetweenDecommissioningStudies_2758" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CapitalizedSoftwareLineItems" xlink:label="Locator_exc_CapitalizedSoftwareLineItems_2675"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CapitalizedSoftwareTable" xlink:label="Locator_exc_CapitalizedSoftwareTable_2676"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="Locator_exc_CapitalizedSoftwareLineItems_2675" xlink:to="Locator_exc_CapitalizedSoftwareTable_2676" order="0.5" xbrldt:contextElement="segment" xbrldt:closed="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CapitalizedSoftwareTable" xlink:label="Locator_exc_CapitalizedSoftwareTable_2687"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_2688"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_exc_CapitalizedSoftwareTable_2687" xlink:to="Locator_dei_LegalEntityAxis_2688" order="0.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CapitalizedSoftwareLineItems" xlink:label="Locator_exc_CapitalizedSoftwareLineItems_2759"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CapitalizedComputerSoftwareNet" xlink:label="Locator_us-gaap_CapitalizedComputerSoftwareNet_2760"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_CapitalizedSoftwareLineItems_2759" xlink:to="Locator_us-gaap_CapitalizedComputerSoftwareNet_2760" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CapitalizedSoftwareLineItems" xlink:label="Locator_exc_CapitalizedSoftwareLineItems_2761"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CapitalizedComputerSoftwareAmortization" xlink:label="Locator_us-gaap_CapitalizedComputerSoftwareAmortization_2762"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_CapitalizedSoftwareLineItems_2761" xlink:to="Locator_us-gaap_CapitalizedComputerSoftwareAmortization_2762" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CapitalizedInterestAndAfudcLineItems" xlink:label="Locator_exc_CapitalizedInterestAndAfudcLineItems_2683"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CapitalizedInterestAndAfudcTable" xlink:label="Locator_exc_CapitalizedInterestAndAfudcTable_2684"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="Locator_exc_CapitalizedInterestAndAfudcLineItems_2683" xlink:to="Locator_exc_CapitalizedInterestAndAfudcTable_2684" order="0.5" xbrldt:contextElement="segment" xbrldt:closed="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CapitalizedInterestAndAfudcTable" xlink:label="Locator_exc_CapitalizedInterestAndAfudcTable_2689"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_2690"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_exc_CapitalizedInterestAndAfudcTable_2689" xlink:to="Locator_dei_LegalEntityAxis_2690" order="0.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CapitalizedInterestAndAfudcLineItems" xlink:label="Locator_exc_CapitalizedInterestAndAfudcLineItems_2763"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_TotalInterestExpense" xlink:label="Locator_exc_TotalInterestExpense_2764"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_CapitalizedInterestAndAfudcLineItems_2763" xlink:to="Locator_exc_TotalInterestExpense_2764" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CapitalizedInterestAndAfudcLineItems" xlink:label="Locator_exc_CapitalizedInterestAndAfudcLineItems_2765"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_InterestCostsCapitalized" xlink:label="Locator_us-gaap_InterestCostsCapitalized_2766"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_CapitalizedInterestAndAfudcLineItems_2765" xlink:to="Locator_us-gaap_InterestCostsCapitalized_2766" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CapitalizedInterestAndAfudcLineItems" xlink:label="Locator_exc_CapitalizedInterestAndAfudcLineItems_2767"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedInterest" xlink:label="Locator_us-gaap_PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedInterest_2768"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_CapitalizedInterestAndAfudcLineItems_2767" xlink:to="Locator_us-gaap_PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedInterest_2768" order="3.0" xbrldt:usable="true"/> |
| | </definitionLink> |
| <definitionLink xlink:type="extended" xlink:role="http://exeloncorp.com/role/DisclosureAssetRetirementObligationDetails"> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_2931"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_2932"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_dei_LegalEntityAxis_2931" xlink:to="Locator_dei_EntityDomain_2932" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_2933"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ExelonGenerationCoLLCMember" xlink:label="Locator_exc_ExelonGenerationCoLLCMember_2934"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_2933" xlink:to="Locator_exc_ExelonGenerationCoLLCMember_2934" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_2935"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CommonwealthEdisonCoMember" xlink:label="Locator_exc_CommonwealthEdisonCoMember_2936"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_2935" xlink:to="Locator_exc_CommonwealthEdisonCoMember_2936" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_2937"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PecoEnergyCoMember" xlink:label="Locator_exc_PecoEnergyCoMember_2938"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_2937" xlink:to="Locator_exc_PecoEnergyCoMember_2938" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_2939"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BaltimoreGasAndElectricCompanyMember" xlink:label="Locator_exc_BaltimoreGasAndElectricCompanyMember_2940"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_2939" xlink:to="Locator_exc_BaltimoreGasAndElectricCompanyMember_2940" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SecuritiesLendingProgramAbstract" xlink:label="Locator_exc_SecuritiesLendingProgramAbstract_3023"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PercentageOfCollateralForBorrowedSecuritiesInDomesticCurrency" xlink:label="Locator_exc_PercentageOfCollateralForBorrowedSecuritiesInDomesticCurrency_3024"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_SecuritiesLendingProgramAbstract_3023" xlink:to="Locator_exc_PercentageOfCollateralForBorrowedSecuritiesInDomesticCurrency_3024" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SecuritiesLendingProgramAbstract" xlink:label="Locator_exc_SecuritiesLendingProgramAbstract_3025"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PercentageOfCollateralForBorrowedSecuritiesInForeignCurrency" xlink:label="Locator_exc_PercentageOfCollateralForBorrowedSecuritiesInForeignCurrency_3026"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_SecuritiesLendingProgramAbstract_3025" xlink:to="Locator_exc_PercentageOfCollateralForBorrowedSecuritiesInForeignCurrency_3026" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SecuritiesLendingProgramAbstract" xlink:label="Locator_exc_SecuritiesLendingProgramAbstract_3027"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PercentageOfCollateralForBorrowedSecuritiesRequiredLevels" xlink:label="Locator_exc_PercentageOfCollateralForBorrowedSecuritiesRequiredLevels_3028"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_SecuritiesLendingProgramAbstract_3027" xlink:to="Locator_exc_PercentageOfCollateralForBorrowedSecuritiesRequiredLevels_3028" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SecuritiesLendingProgramAbstract" xlink:label="Locator_exc_SecuritiesLendingProgramAbstract_3029"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CollateralWeightedAverageMaturity" xlink:label="Locator_exc_CollateralWeightedAverageMaturity_3030"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_SecuritiesLendingProgramAbstract_3029" xlink:to="Locator_exc_CollateralWeightedAverageMaturity_3030" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SecuritiesLendingProgramAbstract" xlink:label="Locator_exc_SecuritiesLendingProgramAbstract_3031"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_SecuritiesLoaned" xlink:label="Locator_us-gaap_SecuritiesLoaned_3032"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_SecuritiesLendingProgramAbstract_3031" xlink:to="Locator_us-gaap_SecuritiesLoaned_3032" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SecuritiesLendingProgramAbstract" xlink:label="Locator_exc_SecuritiesLendingProgramAbstract_3033"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CollateralForBorrowedSecuritiesFairValue" xlink:label="Locator_exc_CollateralForBorrowedSecuritiesFairValue_3034"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_SecuritiesLendingProgramAbstract_3033" xlink:to="Locator_exc_CollateralForBorrowedSecuritiesFairValue_3034" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_UnrealizedLossesOnNuclearDecommissioningTrustFundInvestmentLineItems" xlink:label="Locator_exc_UnrealizedLossesOnNuclearDecommissioningTrustFundInvestmentLineItems_2805"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_UnrealizedLossesOnNuclearDecommissioningTrustFundInvestmentTable" xlink:label="Locator_exc_UnrealizedLossesOnNuclearDecommissioningTrustFundInvestmentTable_2806"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="Locator_exc_UnrealizedLossesOnNuclearDecommissioningTrustFundInvestmentLineItems_2805" xlink:to="Locator_exc_UnrealizedLossesOnNuclearDecommissioningTrustFundInvestmentTable_2806" order="0.5" xbrldt:contextElement="segment" xbrldt:closed="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_UnrealizedLossesOnNuclearDecommissioningTrustFundInvestmentTable" xlink:label="Locator_exc_UnrealizedLossesOnNuclearDecommissioningTrustFundInvestmentTable_2923"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_2924"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_exc_UnrealizedLossesOnNuclearDecommissioningTrustFundInvestmentTable_2923" xlink:to="Locator_dei_LegalEntityAxis_2924" order="0.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_UnrealizedLossesOnNuclearDecommissioningTrustFundInvestmentLineItems" xlink:label="Locator_exc_UnrealizedLossesOnNuclearDecommissioningTrustFundInvestmentLineItems_2941"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_UnrealizedGainLossInvestmentIncomeNuclearDecommissioningTrustFundsRegulatoryAccounting" xlink:label="Locator_exc_UnrealizedGainLossInvestmentIncomeNuclearDecommissioningTrustFundsRegulatoryAccounting_2942"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_UnrealizedLossesOnNuclearDecommissioningTrustFundInvestmentLineItems_2941" xlink:to="Locator_exc_UnrealizedGainLossInvestmentIncomeNuclearDecommissioningTrustFundsRegulatoryAccounting_2942" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_UnrealizedLossesOnNuclearDecommissioningTrustFundInvestmentLineItems" xlink:label="Locator_exc_UnrealizedLossesOnNuclearDecommissioningTrustFundInvestmentLineItems_2943"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_UnrealizedGainLossInvestmentIncomeNuclearDecommissioningTrustFundsNonregulatoryAccounting" xlink:label="Locator_exc_UnrealizedGainLossInvestmentIncomeNuclearDecommissioningTrustFundsNonregulatoryAccounting_2944"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_UnrealizedLossesOnNuclearDecommissioningTrustFundInvestmentLineItems_2943" xlink:to="Locator_exc_UnrealizedGainLossInvestmentIncomeNuclearDecommissioningTrustFundsNonregulatoryAccounting_2944" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_UnrealizedLossesOnNuclearDecommissioningTrustFundInvestmentLineItems" xlink:label="Locator_exc_UnrealizedLossesOnNuclearDecommissioningTrustFundInvestmentLineItems_2945"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FootnotesToUnrealizedGainsLossesOnNdtFundsAbstract" xlink:label="Locator_exc_FootnotesToUnrealizedGainsLossesOnNdtFundsAbstract_2946"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_UnrealizedLossesOnNuclearDecommissioningTrustFundInvestmentLineItems_2945" xlink:to="Locator_exc_FootnotesToUnrealizedGainsLossesOnNdtFundsAbstract_2946" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FootnotesToUnrealizedGainsLossesOnNdtFundsAbstract" xlink:label="Locator_exc_FootnotesToUnrealizedGainsLossesOnNdtFundsAbstract_2947"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_UnrealizedGainLossInvestmentIncomeZionStationPledgedAssets" xlink:label="Locator_exc_UnrealizedGainLossInvestmentIncomeZionStationPledgedAssets_2948"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FootnotesToUnrealizedGainsLossesOnNdtFundsAbstract_2947" xlink:to="Locator_exc_UnrealizedGainLossInvestmentIncomeZionStationPledgedAssets_2948" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AssetRetirementObligationAdditionalNarrativeInformationLineItems" xlink:label="Locator_exc_AssetRetirementObligationAdditionalNarrativeInformationLineItems_2867"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AssetRetirementObligationAdditionalNarrativeInformationTable" xlink:label="Locator_exc_AssetRetirementObligationAdditionalNarrativeInformationTable_2868"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="Locator_exc_AssetRetirementObligationAdditionalNarrativeInformationLineItems_2867" xlink:to="Locator_exc_AssetRetirementObligationAdditionalNarrativeInformationTable_2868" order="0.5" xbrldt:contextElement="segment" xbrldt:closed="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AssetRetirementObligationAdditionalNarrativeInformationTable" xlink:label="Locator_exc_AssetRetirementObligationAdditionalNarrativeInformationTable_2929"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_2930"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_exc_AssetRetirementObligationAdditionalNarrativeInformationTable_2929" xlink:to="Locator_dei_LegalEntityAxis_2930" order="0.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AssetRetirementObligationAdditionalNarrativeInformationLineItems" xlink:label="Locator_exc_AssetRetirementObligationAdditionalNarrativeInformationLineItems_2981"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NuclearDecommissioningAssetRetirementObligationsAbstract" xlink:label="Locator_exc_NuclearDecommissioningAssetRetirementObligationsAbstract_2982"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_AssetRetirementObligationAdditionalNarrativeInformationLineItems_2981" xlink:to="Locator_exc_NuclearDecommissioningAssetRetirementObligationsAbstract_2982" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NuclearDecommissioningAssetRetirementObligationsAbstract" xlink:label="Locator_exc_NuclearDecommissioningAssetRetirementObligationsAbstract_2985"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NuclearAssetRetirementObligationRevisionOfEstimate" xlink:label="Locator_exc_NuclearAssetRetirementObligationRevisionOfEstimate_2986"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_NuclearDecommissioningAssetRetirementObligationsAbstract_2985" xlink:to="Locator_exc_NuclearAssetRetirementObligationRevisionOfEstimate_2986" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NuclearDecommissioningAssetRetirementObligationsAbstract" xlink:label="Locator_exc_NuclearDecommissioningAssetRetirementObligationsAbstract_2983"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NetAdjustmentToNuclearAssetRetirementObligation" xlink:label="Locator_exc_NetAdjustmentToNuclearAssetRetirementObligation_2984"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_NuclearDecommissioningAssetRetirementObligationsAbstract_2983" xlink:to="Locator_exc_NetAdjustmentToNuclearAssetRetirementObligation_2984" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NuclearDecommissioningAssetRetirementObligationsAbstract" xlink:label="Locator_exc_NuclearDecommissioningAssetRetirementObligationsAbstract_2987"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NuclearAssetRetirementObligationRevisionOfEstimateZionStation" xlink:label="Locator_exc_NuclearAssetRetirementObligationRevisionOfEstimateZionStation_2988"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_NuclearDecommissioningAssetRetirementObligationsAbstract_2987" xlink:to="Locator_exc_NuclearAssetRetirementObligationRevisionOfEstimateZionStation_2988" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NuclearDecommissioningAssetRetirementObligationsAbstract" xlink:label="Locator_exc_NuclearDecommissioningAssetRetirementObligationsAbstract_2989"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PreTaxIncomeLossRecognizedFromNuclearAssetRetirementObligationAdjustment" xlink:label="Locator_exc_PreTaxIncomeLossRecognizedFromNuclearAssetRetirementObligationAdjustment_2990"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_NuclearDecommissioningAssetRetirementObligationsAbstract_2989" xlink:to="Locator_exc_PreTaxIncomeLossRecognizedFromNuclearAssetRetirementObligationAdjustment_2990" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AssetRetirementObligationAdditionalNarrativeInformationLineItems" xlink:label="Locator_exc_AssetRetirementObligationAdditionalNarrativeInformationLineItems_2991"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ZionStationDecommissioningAbstract" xlink:label="Locator_exc_ZionStationDecommissioningAbstract_2992"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_AssetRetirementObligationAdditionalNarrativeInformationLineItems_2991" xlink:to="Locator_exc_ZionStationDecommissioningAbstract_2992" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ZionStationDecommissioningAbstract" xlink:label="Locator_exc_ZionStationDecommissioningAbstract_2993"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SpentNuclearFuelObligationZionsolutions" xlink:label="Locator_exc_SpentNuclearFuelObligationZionsolutions_2994"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_ZionStationDecommissioningAbstract_2993" xlink:to="Locator_exc_SpentNuclearFuelObligationZionsolutions_2994" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ZionStationDecommissioningAbstract" xlink:label="Locator_exc_ZionStationDecommissioningAbstract_2995"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AssetsHeldInTrustNoncurrent" xlink:label="Locator_us-gaap_AssetsHeldInTrustNoncurrent_2996"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_ZionStationDecommissioningAbstract_2995" xlink:to="Locator_us-gaap_AssetsHeldInTrustNoncurrent_2996" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ZionStationDecommissioningAbstract" xlink:label="Locator_exc_ZionStationDecommissioningAbstract_2997"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_GrossPayableToZionsolutions" xlink:label="Locator_exc_GrossPayableToZionsolutions_2998"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_ZionStationDecommissioningAbstract_2997" xlink:to="Locator_exc_GrossPayableToZionsolutions_2998" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ZionStationDecommissioningAbstract" xlink:label="Locator_exc_ZionStationDecommissioningAbstract_2999"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CurrentPayableToZionsolutions" xlink:label="Locator_exc_CurrentPayableToZionsolutions_3000"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_ZionStationDecommissioningAbstract_2999" xlink:to="Locator_exc_CurrentPayableToZionsolutions_3000" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ZionStationDecommissioningAbstract" xlink:label="Locator_exc_ZionStationDecommissioningAbstract_3001"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_WithdrawalFromNuclearDecommissioningFunds" xlink:label="Locator_exc_WithdrawalFromNuclearDecommissioningFunds_3002"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_ZionStationDecommissioningAbstract_3001" xlink:to="Locator_exc_WithdrawalFromNuclearDecommissioningFunds_3002" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ZionStationDecommissioningAbstract" xlink:label="Locator_exc_ZionStationDecommissioningAbstract_3003"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ZionsolutionsRentPayable" xlink:label="Locator_exc_ZionsolutionsRentPayable_3004"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_ZionStationDecommissioningAbstract_3003" xlink:to="Locator_exc_ZionsolutionsRentPayable_3004" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ZionStationDecommissioningAbstract" xlink:label="Locator_exc_ZionStationDecommissioningAbstract_3005"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EnergysolutionsLetterOfCredit" xlink:label="Locator_exc_EnergysolutionsLetterOfCredit_3006"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_ZionStationDecommissioningAbstract_3005" xlink:to="Locator_exc_EnergysolutionsLetterOfCredit_3006" order="7.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AssetRetirementObligationAdditionalNarrativeInformationLineItems" xlink:label="Locator_exc_AssetRetirementObligationAdditionalNarrativeInformationLineItems_3007"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NuclearDecommissioningTrustFundInvestmentsAbstract" xlink:label="Locator_exc_NuclearDecommissioningTrustFundInvestmentsAbstract_3008"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_AssetRetirementObligationAdditionalNarrativeInformationLineItems_3007" xlink:to="Locator_exc_NuclearDecommissioningTrustFundInvestmentsAbstract_3008" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NuclearDecommissioningTrustFundInvestmentsAbstract" xlink:label="Locator_exc_NuclearDecommissioningTrustFundInvestmentsAbstract_3009"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ProceedsFromRegulatedRatesForDecommissioningCosts" xlink:label="Locator_exc_ProceedsFromRegulatedRatesForDecommissioningCosts_3010"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_NuclearDecommissioningTrustFundInvestmentsAbstract_3009" xlink:to="Locator_exc_ProceedsFromRegulatedRatesForDecommissioningCosts_3010" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NuclearDecommissioningTrustFundInvestmentsAbstract" xlink:label="Locator_exc_NuclearDecommissioningTrustFundInvestmentsAbstract_3011"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DecommissioningShortfall" xlink:label="Locator_exc_DecommissioningShortfall_3012"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_NuclearDecommissioningTrustFundInvestmentsAbstract_3011" xlink:to="Locator_exc_DecommissioningShortfall_3012" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NuclearDecommissioningTrustFundInvestmentsAbstract" xlink:label="Locator_exc_NuclearDecommissioningTrustFundInvestmentsAbstract_3013"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DecommissioningShortfallPercentage" xlink:label="Locator_exc_DecommissioningShortfallPercentage_3014"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_NuclearDecommissioningTrustFundInvestmentsAbstract_3013" xlink:to="Locator_exc_DecommissioningShortfallPercentage_3014" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NuclearDecommissioningTrustFundInvestmentsAbstract" xlink:label="Locator_exc_NuclearDecommissioningTrustFundInvestmentsAbstract_3017"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NuclearDecommissioningTrustFundEquityPercent" xlink:label="Locator_exc_NuclearDecommissioningTrustFundEquityPercent_3018"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_NuclearDecommissioningTrustFundInvestmentsAbstract_3017" xlink:to="Locator_exc_NuclearDecommissioningTrustFundEquityPercent_3018" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NuclearDecommissioningTrustFundInvestmentsAbstract" xlink:label="Locator_exc_NuclearDecommissioningTrustFundInvestmentsAbstract_3019"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NuclearDecommissioningTrustFundFixedIncomeSecuritiesPercent" xlink:label="Locator_exc_NuclearDecommissioningTrustFundFixedIncomeSecuritiesPercent_3020"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_NuclearDecommissioningTrustFundInvestmentsAbstract_3019" xlink:to="Locator_exc_NuclearDecommissioningTrustFundFixedIncomeSecuritiesPercent_3020" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NuclearDecommissioningTrustFundInvestmentsAbstract" xlink:label="Locator_exc_NuclearDecommissioningTrustFundInvestmentsAbstract_3021"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SecuritiesLendingProgramAbstract" xlink:label="Locator_exc_SecuritiesLendingProgramAbstract_3022"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_NuclearDecommissioningTrustFundInvestmentsAbstract_3021" xlink:to="Locator_exc_SecuritiesLendingProgramAbstract_3022" order="7.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NuclearDecommissioningTrustFundInvestmentsAbstract" xlink:label="Locator_exc_NuclearDecommissioningTrustFundInvestmentsAbstract_3035"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NrcMinimumFundingRequirementsAbstract" xlink:label="Locator_exc_NrcMinimumFundingRequirementsAbstract_3036"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_NuclearDecommissioningTrustFundInvestmentsAbstract_3035" xlink:to="Locator_exc_NrcMinimumFundingRequirementsAbstract_3036" order="8.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NrcMinimumFundingRequirementsAbstract" xlink:label="Locator_exc_NrcMinimumFundingRequirementsAbstract_3037"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AnnualAfterTaxReturnOnNuclearDecommissioningFund" xlink:label="Locator_exc_AnnualAfterTaxReturnOnNuclearDecommissioningFund_3038"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_NrcMinimumFundingRequirementsAbstract_3037" xlink:to="Locator_exc_AnnualAfterTaxReturnOnNuclearDecommissioningFund_3038" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NrcMinimumFundingRequirementsAbstract" xlink:label="Locator_exc_NrcMinimumFundingRequirementsAbstract_3039"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AnnualAfterTaxReturnOnNuclearDecommissioningFundFormerPecoUnits" xlink:label="Locator_exc_AnnualAfterTaxReturnOnNuclearDecommissioningFundFormerPecoUnits_3040"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_NrcMinimumFundingRequirementsAbstract_3039" xlink:to="Locator_exc_AnnualAfterTaxReturnOnNuclearDecommissioningFundFormerPecoUnits_3040" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NrcMinimumFundingRequirementsAbstract" xlink:label="Locator_exc_NrcMinimumFundingRequirementsAbstract_3041"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AnnualAverageAssetRetirementObligationAccretionPercent" xlink:label="Locator_exc_AnnualAverageAssetRetirementObligationAccretionPercent_3042"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_NrcMinimumFundingRequirementsAbstract_3041" xlink:to="Locator_exc_AnnualAverageAssetRetirementObligationAccretionPercent_3042" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NrcMinimumFundingRequirementsAbstract" xlink:label="Locator_exc_NrcMinimumFundingRequirementsAbstract_3043"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EstimatedAnnualAfterTaxReturnOnNuclearDecommissioningFundsLowerBound" xlink:label="Locator_exc_EstimatedAnnualAfterTaxReturnOnNuclearDecommissioningFundsLowerBound_3044"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_NrcMinimumFundingRequirementsAbstract_3043" xlink:to="Locator_exc_EstimatedAnnualAfterTaxReturnOnNuclearDecommissioningFundsLowerBound_3044" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NrcMinimumFundingRequirementsAbstract" xlink:label="Locator_exc_NrcMinimumFundingRequirementsAbstract_3045"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EstimatedAnnualAfterTaxReturnOnNuclearDecommissioningFundsUpperBound" xlink:label="Locator_exc_EstimatedAnnualAfterTaxReturnOnNuclearDecommissioningFundsUpperBound_3046"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_NrcMinimumFundingRequirementsAbstract_3045" xlink:to="Locator_exc_EstimatedAnnualAfterTaxReturnOnNuclearDecommissioningFundsUpperBound_3046" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NrcMinimumFundingRequirementsAbstract" xlink:label="Locator_exc_NrcMinimumFundingRequirementsAbstract_3047"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AnnualAverageAfterTaxReturnNuclearDecommissioningFundsHistorical" xlink:label="Locator_exc_AnnualAverageAfterTaxReturnNuclearDecommissioningFundsHistorical_3048"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_NrcMinimumFundingRequirementsAbstract_3047" xlink:to="Locator_exc_AnnualAverageAfterTaxReturnNuclearDecommissioningFundsHistorical_3048" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NrcMinimumFundingRequirementsAbstract" xlink:label="Locator_exc_NrcMinimumFundingRequirementsAbstract_3049"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NrcFundingAssuranceParentGuarantees" xlink:label="Locator_exc_NrcFundingAssuranceParentGuarantees_3050"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_NrcMinimumFundingRequirementsAbstract_3049" xlink:to="Locator_exc_NrcFundingAssuranceParentGuarantees_3050" order="7.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NrcMinimumFundingRequirementsAbstract" xlink:label="Locator_exc_NrcMinimumFundingRequirementsAbstract_3051"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AdditionalNrcFundingAssuranceParentGuarantees" xlink:label="Locator_exc_AdditionalNrcFundingAssuranceParentGuarantees_3052"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_NrcMinimumFundingRequirementsAbstract_3051" xlink:to="Locator_exc_AdditionalNrcFundingAssuranceParentGuarantees_3052" order="8.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NuclearDecommissioningTrustFundInvestmentsAbstract" xlink:label="Locator_exc_NuclearDecommissioningTrustFundInvestmentsAbstract_3015"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DecommissioningFundInvestments" xlink:label="Locator_us-gaap_DecommissioningFundInvestments_3016"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_NuclearDecommissioningTrustFundInvestmentsAbstract_3015" xlink:to="Locator_us-gaap_DecommissioningFundInvestments_3016" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NuclearDecommissioningAssetRetirementObligationRollForwardAnalysisLineItems" xlink:label="Locator_exc_NuclearDecommissioningAssetRetirementObligationRollForwardAnalysisLineItems_2813"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NuclearDecommissioningAssetRetirementObligationRollForwardAnalysisTable" xlink:label="Locator_exc_NuclearDecommissioningAssetRetirementObligationRollForwardAnalysisTable_2814"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="Locator_exc_NuclearDecommissioningAssetRetirementObligationRollForwardAnalysisLineItems_2813" xlink:to="Locator_exc_NuclearDecommissioningAssetRetirementObligationRollForwardAnalysisTable_2814" order="0.5" xbrldt:contextElement="segment" xbrldt:closed="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NuclearDecommissioningAssetRetirementObligationRollForwardAnalysisTable" xlink:label="Locator_exc_NuclearDecommissioningAssetRetirementObligationRollForwardAnalysisTable_2925"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_2926"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_exc_NuclearDecommissioningAssetRetirementObligationRollForwardAnalysisTable_2925" xlink:to="Locator_dei_LegalEntityAxis_2926" order="0.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NuclearDecommissioningAssetRetirementObligationRollForwardAnalysisLineItems" xlink:label="Locator_exc_NuclearDecommissioningAssetRetirementObligationRollForwardAnalysisLineItems_2949"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NuclearDecommissioningAssetRetirementObligationAbstract" xlink:label="Locator_exc_NuclearDecommissioningAssetRetirementObligationAbstract_2950"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_NuclearDecommissioningAssetRetirementObligationRollForwardAnalysisLineItems_2949" xlink:to="Locator_exc_NuclearDecommissioningAssetRetirementObligationAbstract_2950" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NuclearDecommissioningAssetRetirementObligationAbstract" xlink:label="Locator_exc_NuclearDecommissioningAssetRetirementObligationAbstract_2951"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NuclearAssetRetirementObligation" xlink:label="Locator_exc_NuclearAssetRetirementObligation_2952"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_NuclearDecommissioningAssetRetirementObligationAbstract_2951" xlink:to="Locator_exc_NuclearAssetRetirementObligation_2952" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NuclearDecommissioningAssetRetirementObligationAbstract" xlink:label="Locator_exc_NuclearDecommissioningAssetRetirementObligationAbstract_2953"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NuclearAssetRetirementObligationAccretionExpense" xlink:label="Locator_exc_NuclearAssetRetirementObligationAccretionExpense_2954"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_NuclearDecommissioningAssetRetirementObligationAbstract_2953" xlink:to="Locator_exc_NuclearAssetRetirementObligationAccretionExpense_2954" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NuclearDecommissioningAssetRetirementObligationAbstract" xlink:label="Locator_exc_NuclearDecommissioningAssetRetirementObligationAbstract_2955"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NuclearAssetRetirementObligationRevisionOfEstimate" xlink:label="Locator_exc_NuclearAssetRetirementObligationRevisionOfEstimate_2956"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_NuclearDecommissioningAssetRetirementObligationAbstract_2955" xlink:to="Locator_exc_NuclearAssetRetirementObligationRevisionOfEstimate_2956" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NuclearDecommissioningAssetRetirementObligationAbstract" xlink:label="Locator_exc_NuclearDecommissioningAssetRetirementObligationAbstract_2957"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NuclearAssetRetirementObligationExtinguishment" xlink:label="Locator_exc_NuclearAssetRetirementObligationExtinguishment_2958"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_NuclearDecommissioningAssetRetirementObligationAbstract_2957" xlink:to="Locator_exc_NuclearAssetRetirementObligationExtinguishment_2958" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NuclearDecommissioningAssetRetirementObligationAbstract" xlink:label="Locator_exc_NuclearDecommissioningAssetRetirementObligationAbstract_2959"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NuclearAssetRetirementObligationLiabilitiesSettled" xlink:label="Locator_exc_NuclearAssetRetirementObligationLiabilitiesSettled_2960"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_NuclearDecommissioningAssetRetirementObligationAbstract_2959" xlink:to="Locator_exc_NuclearAssetRetirementObligationLiabilitiesSettled_2960" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NuclearDecommissioningAssetRetirementObligationRollForwardAnalysisLineItems" xlink:label="Locator_exc_NuclearDecommissioningAssetRetirementObligationRollForwardAnalysisLineItems_2961"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FootnotesToNuclearDecommissioningAssetRetirementObligationAbstract" xlink:label="Locator_exc_FootnotesToNuclearDecommissioningAssetRetirementObligationAbstract_2962"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_NuclearDecommissioningAssetRetirementObligationRollForwardAnalysisLineItems_2961" xlink:to="Locator_exc_FootnotesToNuclearDecommissioningAssetRetirementObligationAbstract_2962" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FootnotesToNuclearDecommissioningAssetRetirementObligationAbstract" xlink:label="Locator_exc_FootnotesToNuclearDecommissioningAssetRetirementObligationAbstract_2963"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AssetRetirementObligationCurrent" xlink:label="Locator_us-gaap_AssetRetirementObligationCurrent_2964"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FootnotesToNuclearDecommissioningAssetRetirementObligationAbstract_2963" xlink:to="Locator_us-gaap_AssetRetirementObligationCurrent_2964" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NonNuclearAssetRetirementObligationRollForwardAnalysisLineItems" xlink:label="Locator_exc_NonNuclearAssetRetirementObligationRollForwardAnalysisLineItems_2833"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NonNuclearAssetRetirementObligationRollForwardAnalysisTable" xlink:label="Locator_exc_NonNuclearAssetRetirementObligationRollForwardAnalysisTable_2834"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="Locator_exc_NonNuclearAssetRetirementObligationRollForwardAnalysisLineItems_2833" xlink:to="Locator_exc_NonNuclearAssetRetirementObligationRollForwardAnalysisTable_2834" order="0.5" xbrldt:contextElement="segment" xbrldt:closed="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NonNuclearAssetRetirementObligationRollForwardAnalysisTable" xlink:label="Locator_exc_NonNuclearAssetRetirementObligationRollForwardAnalysisTable_2927"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_2928"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_exc_NonNuclearAssetRetirementObligationRollForwardAnalysisTable_2927" xlink:to="Locator_dei_LegalEntityAxis_2928" order="0.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NonNuclearAssetRetirementObligationRollForwardAnalysisLineItems" xlink:label="Locator_exc_NonNuclearAssetRetirementObligationRollForwardAnalysisLineItems_2965"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AssetRetirementObligationRollForwardAnalysisRollForward" xlink:label="Locator_us-gaap_AssetRetirementObligationRollForwardAnalysisRollForward_2966"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_NonNuclearAssetRetirementObligationRollForwardAnalysisLineItems_2965" xlink:to="Locator_us-gaap_AssetRetirementObligationRollForwardAnalysisRollForward_2966" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AssetRetirementObligationRollForwardAnalysisRollForward" xlink:label="Locator_us-gaap_AssetRetirementObligationRollForwardAnalysisRollForward_2967"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AssetRetirementObligation" xlink:label="Locator_us-gaap_AssetRetirementObligation_2968"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_AssetRetirementObligationRollForwardAnalysisRollForward_2967" xlink:to="Locator_us-gaap_AssetRetirementObligation_2968" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AssetRetirementObligationRollForwardAnalysisRollForward" xlink:label="Locator_us-gaap_AssetRetirementObligationRollForwardAnalysisRollForward_2969"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AssetRetirementObligationRevisionOfEstimate" xlink:label="Locator_us-gaap_AssetRetirementObligationRevisionOfEstimate_2970"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_AssetRetirementObligationRollForwardAnalysisRollForward_2969" xlink:to="Locator_us-gaap_AssetRetirementObligationRevisionOfEstimate_2970" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AssetRetirementObligationRollForwardAnalysisRollForward" xlink:label="Locator_us-gaap_AssetRetirementObligationRollForwardAnalysisRollForward_2971"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NonNuclearAssetRetirementObligationAccretionExpense" xlink:label="Locator_exc_NonNuclearAssetRetirementObligationAccretionExpense_2972"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_AssetRetirementObligationRollForwardAnalysisRollForward_2971" xlink:to="Locator_exc_NonNuclearAssetRetirementObligationAccretionExpense_2972" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AssetRetirementObligationRollForwardAnalysisRollForward" xlink:label="Locator_us-gaap_AssetRetirementObligationRollForwardAnalysisRollForward_2973"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AssetRetirementObligationLiabilitiesPurchased" xlink:label="Locator_exc_AssetRetirementObligationLiabilitiesPurchased_2974"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_AssetRetirementObligationRollForwardAnalysisRollForward_2973" xlink:to="Locator_exc_AssetRetirementObligationLiabilitiesPurchased_2974" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AssetRetirementObligationRollForwardAnalysisRollForward" xlink:label="Locator_us-gaap_AssetRetirementObligationRollForwardAnalysisRollForward_2975"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AssetRetirementObligationLiabilitiesSettled" xlink:label="Locator_us-gaap_AssetRetirementObligationLiabilitiesSettled_2976"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_AssetRetirementObligationRollForwardAnalysisRollForward_2975" xlink:to="Locator_us-gaap_AssetRetirementObligationLiabilitiesSettled_2976" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NonNuclearAssetRetirementObligationRollForwardAnalysisLineItems" xlink:label="Locator_exc_NonNuclearAssetRetirementObligationRollForwardAnalysisLineItems_2977"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FootnotesToNonnuclearRollforwardAbstract" xlink:label="Locator_exc_FootnotesToNonnuclearRollforwardAbstract_2978"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_NonNuclearAssetRetirementObligationRollForwardAnalysisLineItems_2977" xlink:to="Locator_exc_FootnotesToNonnuclearRollforwardAbstract_2978" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FootnotesToNonnuclearRollforwardAbstract" xlink:label="Locator_exc_FootnotesToNonnuclearRollforwardAbstract_2979"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AssetRetirementObligationRevisionOfEstimateInOperatingAndMaintenanceExpense" xlink:label="Locator_exc_AssetRetirementObligationRevisionOfEstimateInOperatingAndMaintenanceExpense_2980"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FootnotesToNonnuclearRollforwardAbstract_2979" xlink:to="Locator_exc_AssetRetirementObligationRevisionOfEstimateInOperatingAndMaintenanceExpense_2980" order="1.0" xbrldt:usable="true"/> |
| | </definitionLink> |
| <definitionLink xlink:type="extended" xlink:role="http://exeloncorp.com/role/DisclosurePlantRetirementsDetails"> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_3155"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_3156"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_dei_LegalEntityAxis_3155" xlink:to="Locator_dei_EntityDomain_3156" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_3167"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BusinessServicesCompanyMember" xlink:label="Locator_exc_BusinessServicesCompanyMember_3168"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_3167" xlink:to="Locator_exc_BusinessServicesCompanyMember_3168" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_3157"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ExelonGenerationCoLLCMember" xlink:label="Locator_exc_ExelonGenerationCoLLCMember_3158"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_3157" xlink:to="Locator_exc_ExelonGenerationCoLLCMember_3158" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_3159"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CommonwealthEdisonCoMember" xlink:label="Locator_exc_CommonwealthEdisonCoMember_3160"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_3159" xlink:to="Locator_exc_CommonwealthEdisonCoMember_3160" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_3161"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PecoEnergyCoMember" xlink:label="Locator_exc_PecoEnergyCoMember_3162"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_3161" xlink:to="Locator_exc_PecoEnergyCoMember_3162" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_3163"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BaltimoreGasAndElectricCompanyMember" xlink:label="Locator_exc_BaltimoreGasAndElectricCompanyMember_3164"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_3163" xlink:to="Locator_exc_BaltimoreGasAndElectricCompanyMember_3164" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_3165"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OtherSegmentMember" xlink:label="Locator_exc_OtherSegmentMember_3166"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_3165" xlink:to="Locator_exc_OtherSegmentMember_3166" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PlantRetirementsReserveLineItems" xlink:label="Locator_exc_PlantRetirementsReserveLineItems_3109"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ScheduleOfPlantRetirementSeveranceBenefitObligationTable" xlink:label="Locator_exc_ScheduleOfPlantRetirementSeveranceBenefitObligationTable_3110"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="Locator_exc_PlantRetirementsReserveLineItems_3109" xlink:to="Locator_exc_ScheduleOfPlantRetirementSeveranceBenefitObligationTable_3110" order="0.5" xbrldt:contextElement="segment" xbrldt:closed="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ScheduleOfPlantRetirementSeveranceBenefitObligationTable" xlink:label="Locator_exc_ScheduleOfPlantRetirementSeveranceBenefitObligationTable_3149"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_3150"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_exc_ScheduleOfPlantRetirementSeveranceBenefitObligationTable_3149" xlink:to="Locator_dei_LegalEntityAxis_3150" order="0.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PlantRetirementsReserveLineItems" xlink:label="Locator_exc_PlantRetirementsReserveLineItems_3187"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PlantRetirementSeveranceCharges" xlink:label="Locator_exc_PlantRetirementSeveranceCharges_3188"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_PlantRetirementsReserveLineItems_3187" xlink:to="Locator_exc_PlantRetirementSeveranceCharges_3188" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PlantRetirementsReserveLineItems" xlink:label="Locator_exc_PlantRetirementsReserveLineItems_3189"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PlantRetirementCashPayments" xlink:label="Locator_exc_PlantRetirementCashPayments_3190"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_PlantRetirementsReserveLineItems_3189" xlink:to="Locator_exc_PlantRetirementCashPayments_3190" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PlantRetirementsReserveLineItems" xlink:label="Locator_exc_PlantRetirementsReserveLineItems_3191"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PlantRetirementSeveranceObligationOtherAdjustments" xlink:label="Locator_exc_PlantRetirementSeveranceObligationOtherAdjustments_3192"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_PlantRetirementsReserveLineItems_3191" xlink:to="Locator_exc_PlantRetirementSeveranceObligationOtherAdjustments_3192" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PlantRetirementsReserveLineItems" xlink:label="Locator_exc_PlantRetirementsReserveLineItems_3193"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PlantRetirementObligationsBalance" xlink:label="Locator_exc_PlantRetirementObligationsBalance_3194"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_PlantRetirementsReserveLineItems_3193" xlink:to="Locator_exc_PlantRetirementObligationsBalance_3194" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CorporateRestructuringSeveranceBenefitObligationLineItems" xlink:label="Locator_exc_CorporateRestructuringSeveranceBenefitObligationLineItems_3097"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ScheduleOfCorporateRestructuringSeveranceBenefitObligationTable" xlink:label="Locator_exc_ScheduleOfCorporateRestructuringSeveranceBenefitObligationTable_3098"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="Locator_exc_CorporateRestructuringSeveranceBenefitObligationLineItems_3097" xlink:to="Locator_exc_ScheduleOfCorporateRestructuringSeveranceBenefitObligationTable_3098" order="0.5" xbrldt:contextElement="segment" xbrldt:closed="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ScheduleOfCorporateRestructuringSeveranceBenefitObligationTable" xlink:label="Locator_exc_ScheduleOfCorporateRestructuringSeveranceBenefitObligationTable_3147"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_3148"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_exc_ScheduleOfCorporateRestructuringSeveranceBenefitObligationTable_3147" xlink:to="Locator_dei_LegalEntityAxis_3148" order="0.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CorporateRestructuringSeveranceBenefitObligationLineItems" xlink:label="Locator_exc_CorporateRestructuringSeveranceBenefitObligationLineItems_3179"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SeveranceObligationSeveranceCharges" xlink:label="Locator_exc_SeveranceObligationSeveranceCharges_3180"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_CorporateRestructuringSeveranceBenefitObligationLineItems_3179" xlink:to="Locator_exc_SeveranceObligationSeveranceCharges_3180" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CorporateRestructuringSeveranceBenefitObligationLineItems" xlink:label="Locator_exc_CorporateRestructuringSeveranceBenefitObligationLineItems_3181"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PaymentsForPostemploymentBenefits" xlink:label="Locator_us-gaap_PaymentsForPostemploymentBenefits_3182"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_CorporateRestructuringSeveranceBenefitObligationLineItems_3181" xlink:to="Locator_us-gaap_PaymentsForPostemploymentBenefits_3182" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CorporateRestructuringSeveranceBenefitObligationLineItems" xlink:label="Locator_exc_CorporateRestructuringSeveranceBenefitObligationLineItems_3183"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SeveranceObligationOtherAdjustments" xlink:label="Locator_exc_SeveranceObligationOtherAdjustments_3184"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_CorporateRestructuringSeveranceBenefitObligationLineItems_3183" xlink:to="Locator_exc_SeveranceObligationOtherAdjustments_3184" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CorporateRestructuringSeveranceBenefitObligationLineItems" xlink:label="Locator_exc_CorporateRestructuringSeveranceBenefitObligationLineItems_3185"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SeveranceBenefitsObligationsBalance" xlink:label="Locator_exc_SeveranceBenefitsObligationsBalance_3186"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_CorporateRestructuringSeveranceBenefitObligationLineItems_3185" xlink:to="Locator_exc_SeveranceBenefitsObligationsBalance_3186" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PlantRetirementsAdditionalNarrativeInformationLineItems" xlink:label="Locator_exc_PlantRetirementsAdditionalNarrativeInformationLineItems_3117"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PlantRetirementsAdditionalNarrativeInformationTable" xlink:label="Locator_exc_PlantRetirementsAdditionalNarrativeInformationTable_3118"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="Locator_exc_PlantRetirementsAdditionalNarrativeInformationLineItems_3117" xlink:to="Locator_exc_PlantRetirementsAdditionalNarrativeInformationTable_3118" order="0.5" xbrldt:contextElement="segment" xbrldt:closed="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PlantRetirementsAdditionalNarrativeInformationTable" xlink:label="Locator_exc_PlantRetirementsAdditionalNarrativeInformationTable_3151"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_3152"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_exc_PlantRetirementsAdditionalNarrativeInformationTable_3151" xlink:to="Locator_dei_LegalEntityAxis_3152" order="0.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PlantRetirementsAdditionalNarrativeInformationTable" xlink:label="Locator_exc_PlantRetirementsAdditionalNarrativeInformationTable_3153"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PlantRetirementsAxis" xlink:label="Locator_exc_PlantRetirementsAxis_3154"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_exc_PlantRetirementsAdditionalNarrativeInformationTable_3153" xlink:to="Locator_exc_PlantRetirementsAxis_3154" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PlantRetirementsAxis" xlink:label="Locator_exc_PlantRetirementsAxis_3085"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PlantRetirementsDomain" xlink:label="Locator_exc_PlantRetirementsDomain_3086"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="Locator_exc_PlantRetirementsAxis_3085" xlink:to="Locator_exc_PlantRetirementsDomain_3086" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PlantRetirementsAxis" xlink:label="Locator_exc_PlantRetirementsAxis_3169"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PlantRetirementsDomain" xlink:label="Locator_exc_PlantRetirementsDomain_3170"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_exc_PlantRetirementsAxis_3169" xlink:to="Locator_exc_PlantRetirementsDomain_3170" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PlantRetirementsDomain" xlink:label="Locator_exc_PlantRetirementsDomain_3171"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EddystoneGeneratingStationMember" xlink:label="Locator_exc_EddystoneGeneratingStationMember_3172"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_PlantRetirementsDomain_3171" xlink:to="Locator_exc_EddystoneGeneratingStationMember_3172" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PlantRetirementsDomain" xlink:label="Locator_exc_PlantRetirementsDomain_3173"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CrombyGenerationStationMember" xlink:label="Locator_exc_CrombyGenerationStationMember_3174"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_PlantRetirementsDomain_3173" xlink:to="Locator_exc_CrombyGenerationStationMember_3174" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PlantRetirementsDomain" xlink:label="Locator_exc_PlantRetirementsDomain_3175"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SchuylkillStationUnitOneMember" xlink:label="Locator_exc_SchuylkillStationUnitOneMember_3176"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_PlantRetirementsDomain_3175" xlink:to="Locator_exc_SchuylkillStationUnitOneMember_3176" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PlantRetirementsDomain" xlink:label="Locator_exc_PlantRetirementsDomain_3177"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RiversideStationUnitSixMember" xlink:label="Locator_exc_RiversideStationUnitSixMember_3178"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_PlantRetirementsDomain_3177" xlink:to="Locator_exc_RiversideStationUnitSixMember_3178" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PlantRetirementsAdditionalNarrativeInformationLineItems" xlink:label="Locator_exc_PlantRetirementsAdditionalNarrativeInformationLineItems_3195"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PlantRetirementCostAbstract" xlink:label="Locator_exc_PlantRetirementCostAbstract_3196"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_PlantRetirementsAdditionalNarrativeInformationLineItems_3195" xlink:to="Locator_exc_PlantRetirementCostAbstract_3196" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PlantRetirementCostAbstract" xlink:label="Locator_exc_PlantRetirementCostAbstract_3197"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessExitCosts" xlink:label="Locator_us-gaap_BusinessExitCosts_3198"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_PlantRetirementCostAbstract_3197" xlink:to="Locator_us-gaap_BusinessExitCosts_3198" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PlantRetirementCostAbstract" xlink:label="Locator_exc_PlantRetirementCostAbstract_3199"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PlantRetirementsSeveranceCosts" xlink:label="Locator_exc_PlantRetirementsSeveranceCosts_3200"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_PlantRetirementCostAbstract_3199" xlink:to="Locator_exc_PlantRetirementsSeveranceCosts_3200" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PlantRetirementCostAbstract" xlink:label="Locator_exc_PlantRetirementCostAbstract_3201"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_InventoryWriteDown" xlink:label="Locator_us-gaap_InventoryWriteDown_3202"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_PlantRetirementCostAbstract_3201" xlink:to="Locator_us-gaap_InventoryWriteDown_3202" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PlantRetirementCostAbstract" xlink:label="Locator_exc_PlantRetirementCostAbstract_3203"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RestructuringCharges" xlink:label="Locator_us-gaap_RestructuringCharges_3204"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_PlantRetirementCostAbstract_3203" xlink:to="Locator_us-gaap_RestructuringCharges_3204" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PlantRetirementCostAbstract" xlink:label="Locator_exc_PlantRetirementCostAbstract_3205"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PlantRetirementsAcceleratedDepreciation" xlink:label="Locator_exc_PlantRetirementsAcceleratedDepreciation_3206"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_PlantRetirementCostAbstract_3205" xlink:to="Locator_exc_PlantRetirementsAcceleratedDepreciation_3206" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PlantRetirementCostAbstract" xlink:label="Locator_exc_PlantRetirementCostAbstract_3207"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RestructuringAndRelatedCostExpectedCost" xlink:label="Locator_us-gaap_RestructuringAndRelatedCostExpectedCost_3208"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_PlantRetirementCostAbstract_3207" xlink:to="Locator_us-gaap_RestructuringAndRelatedCostExpectedCost_3208" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PlantRetirementsAdditionalNarrativeInformationLineItems" xlink:label="Locator_exc_PlantRetirementsAdditionalNarrativeInformationLineItems_3209"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PlantRetirementPositionsEliminatedAbstract" xlink:label="Locator_exc_PlantRetirementPositionsEliminatedAbstract_3210"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_PlantRetirementsAdditionalNarrativeInformationLineItems_3209" xlink:to="Locator_exc_PlantRetirementPositionsEliminatedAbstract_3210" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PlantRetirementPositionsEliminatedAbstract" xlink:label="Locator_exc_PlantRetirementPositionsEliminatedAbstract_3211"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PlantRetirementsPositionsEliminated" xlink:label="Locator_exc_PlantRetirementsPositionsEliminated_3212"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_PlantRetirementPositionsEliminatedAbstract_3211" xlink:to="Locator_exc_PlantRetirementsPositionsEliminated_3212" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PlantRetirementPositionsEliminatedAbstract" xlink:label="Locator_exc_PlantRetirementPositionsEliminatedAbstract_3213"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CoalFiredGeneratingUnitsRetired" xlink:label="Locator_exc_CoalFiredGeneratingUnitsRetired_3214"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_PlantRetirementPositionsEliminatedAbstract_3213" xlink:to="Locator_exc_CoalFiredGeneratingUnitsRetired_3214" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PlantRetirementPositionsEliminatedAbstract" xlink:label="Locator_exc_PlantRetirementPositionsEliminatedAbstract_3215"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OilGasGeneratingUnitsRetired" xlink:label="Locator_exc_OilGasGeneratingUnitsRetired_3216"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_PlantRetirementPositionsEliminatedAbstract_3215" xlink:to="Locator_exc_OilGasGeneratingUnitsRetired_3216" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PlantRetirementPositionsEliminatedAbstract" xlink:label="Locator_exc_PlantRetirementPositionsEliminatedAbstract_3217"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FossilGeneratingUnitCapacityToBeRetired" xlink:label="Locator_exc_FossilGeneratingUnitCapacityToBeRetired_3218"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_PlantRetirementPositionsEliminatedAbstract_3217" xlink:to="Locator_exc_FossilGeneratingUnitCapacityToBeRetired_3218" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PlantRetirementsAdditionalNarrativeInformationLineItems" xlink:label="Locator_exc_PlantRetirementsAdditionalNarrativeInformationLineItems_3219"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PlantRetirementsReliabilityMustRunRevenueAbstract" xlink:label="Locator_exc_PlantRetirementsReliabilityMustRunRevenueAbstract_3220"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_PlantRetirementsAdditionalNarrativeInformationLineItems_3219" xlink:to="Locator_exc_PlantRetirementsReliabilityMustRunRevenueAbstract_3220" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PlantRetirementsReliabilityMustRunRevenueAbstract" xlink:label="Locator_exc_PlantRetirementsReliabilityMustRunRevenueAbstract_3221"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PlantMonthlyRevenueDuringReliabilityMustRunPeriod" xlink:label="Locator_exc_PlantMonthlyRevenueDuringReliabilityMustRunPeriod_3222"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_PlantRetirementsReliabilityMustRunRevenueAbstract_3221" xlink:to="Locator_exc_PlantMonthlyRevenueDuringReliabilityMustRunPeriod_3222" order="1.0" xbrldt:usable="true"/> |
| | </definitionLink> |
| <definitionLink xlink:type="extended" xlink:role="http://exeloncorp.com/role/DisclosureFairValueOfFinancialAssetsAndLiabilitiesTables"> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_3277"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_3278"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_dei_LegalEntityAxis_3277" xlink:to="Locator_dei_EntityDomain_3278" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_3279"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ExelonGenerationCoLLCMember" xlink:label="Locator_exc_ExelonGenerationCoLLCMember_3280"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_3279" xlink:to="Locator_exc_ExelonGenerationCoLLCMember_3280" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_3281"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CommonwealthEdisonCoMember" xlink:label="Locator_exc_CommonwealthEdisonCoMember_3282"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_3281" xlink:to="Locator_exc_CommonwealthEdisonCoMember_3282" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_3283"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PecoEnergyCoMember" xlink:label="Locator_exc_PecoEnergyCoMember_3284"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_3283" xlink:to="Locator_exc_PecoEnergyCoMember_3284" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_3285"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BaltimoreGasAndElectricCompanyMember" xlink:label="Locator_exc_BaltimoreGasAndElectricCompanyMember_3286"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_3285" xlink:to="Locator_exc_BaltimoreGasAndElectricCompanyMember_3286" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementTable" xlink:label="Locator_us-gaap_StatementTable_3275"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_3276"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_us-gaap_StatementTable_3275" xlink:to="Locator_dei_LegalEntityAxis_3276" order="0.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueTablesLineItems" xlink:label="Locator_exc_FairValueTablesLineItems_3271"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementTable" xlink:label="Locator_us-gaap_StatementTable_3272"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="Locator_exc_FairValueTablesLineItems_3271" xlink:to="Locator_us-gaap_StatementTable_3272" order="0.5" xbrldt:contextElement="segment" xbrldt:closed="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueTablesLineItems" xlink:label="Locator_exc_FairValueTablesLineItems_3287"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FairValueByBalanceSheetGroupingTextBlock" xlink:label="Locator_us-gaap_FairValueByBalanceSheetGroupingTextBlock_3288"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FairValueTablesLineItems_3287" xlink:to="Locator_us-gaap_FairValueByBalanceSheetGroupingTextBlock_3288" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueTablesLineItems" xlink:label="Locator_exc_FairValueTablesLineItems_3289"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTextBlock" xlink:label="Locator_exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTextBlock_3290"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FairValueTablesLineItems_3289" xlink:to="Locator_exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTextBlock_3290" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueTablesLineItems" xlink:label="Locator_exc_FairValueTablesLineItems_3291"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTextBlock" xlink:label="Locator_exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTextBlock_3292"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FairValueTablesLineItems_3291" xlink:to="Locator_exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTextBlock_3292" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueTablesLineItems" xlink:label="Locator_exc_FairValueTablesLineItems_3293"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisGainLossIncludedInEarningsTextBlock" xlink:label="Locator_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisGainLossIncludedInEarningsTextBlock_3294"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FairValueTablesLineItems_3293" xlink:to="Locator_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisGainLossIncludedInEarningsTextBlock_3294" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueTablesLineItems" xlink:label="Locator_exc_FairValueTablesLineItems_3295"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FairValueAssetsMeasuredOnNonrecurringBasisValuationTechniquesTextBlock" xlink:label="Locator_us-gaap_FairValueAssetsMeasuredOnNonrecurringBasisValuationTechniquesTextBlock_3296"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FairValueTablesLineItems_3295" xlink:to="Locator_us-gaap_FairValueAssetsMeasuredOnNonrecurringBasisValuationTechniquesTextBlock_3296" order="5.0" xbrldt:usable="true"/> |
| | </definitionLink> |
| <definitionLink xlink:type="extended" xlink:role="http://exeloncorp.com/role/FairValueOfFinancialAssetsAndLiabilitiesFairValueMeasurementsRecurringAndNonrecurringDetails"> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_3511"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_3512"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_dei_LegalEntityAxis_3511" xlink:to="Locator_dei_EntityDomain_3512" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_3513"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ExelonGenerationCoLLCMember" xlink:label="Locator_exc_ExelonGenerationCoLLCMember_3514"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_3513" xlink:to="Locator_exc_ExelonGenerationCoLLCMember_3514" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_3515"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CommonwealthEdisonCoMember" xlink:label="Locator_exc_CommonwealthEdisonCoMember_3516"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_3515" xlink:to="Locator_exc_CommonwealthEdisonCoMember_3516" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_3517"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PecoEnergyCoMember" xlink:label="Locator_exc_PecoEnergyCoMember_3518"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_3517" xlink:to="Locator_exc_PecoEnergyCoMember_3518" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_3519"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BaltimoreGasAndElectricCompanyMember" xlink:label="Locator_exc_BaltimoreGasAndElectricCompanyMember_3520"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_3519" xlink:to="Locator_exc_BaltimoreGasAndElectricCompanyMember_3520" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisFinancialStatementCaptionsLineItems" xlink:label="Locator_exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisFinancialStatementCaptionsLineItems_3319"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueAssetsLiabilitiesMeasuredOnRecurringBasisTable" xlink:label="Locator_exc_FairValueAssetsLiabilitiesMeasuredOnRecurringBasisTable_3320"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="Locator_exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisFinancialStatementCaptionsLineItems_3319" xlink:to="Locator_exc_FairValueAssetsLiabilitiesMeasuredOnRecurringBasisTable_3320" order="0.5" xbrldt:contextElement="segment" xbrldt:closed="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueAssetsLiabilitiesMeasuredOnRecurringBasisTable" xlink:label="Locator_exc_FairValueAssetsLiabilitiesMeasuredOnRecurringBasisTable_3505"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_3506"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_exc_FairValueAssetsLiabilitiesMeasuredOnRecurringBasisTable_3505" xlink:to="Locator_dei_LegalEntityAxis_3506" order="0.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueAssetsLiabilitiesMeasuredOnRecurringBasisTable" xlink:label="Locator_exc_FairValueAssetsLiabilitiesMeasuredOnRecurringBasisTable_3507"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisDisclosureItemsAxis" xlink:label="Locator_exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisDisclosureItemsAxis_3508"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_exc_FairValueAssetsLiabilitiesMeasuredOnRecurringBasisTable_3507" xlink:to="Locator_exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisDisclosureItemsAxis_3508" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisDisclosureItemsAxis" xlink:label="Locator_exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisDisclosureItemsAxis_3311"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisDomain" xlink:label="Locator_exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisDomain_3312"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="Locator_exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisDisclosureItemsAxis_3311" xlink:to="Locator_exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisDomain_3312" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisDisclosureItemsAxis" xlink:label="Locator_exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisDisclosureItemsAxis_3521"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisDomain" xlink:label="Locator_exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisDomain_3522"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisDisclosureItemsAxis_3521" xlink:to="Locator_exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisDomain_3522" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisDomain" xlink:label="Locator_exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisDomain_3523"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FairValueInputsLevel1Member" xlink:label="Locator_us-gaap_FairValueInputsLevel1Member_3524"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisDomain_3523" xlink:to="Locator_us-gaap_FairValueInputsLevel1Member_3524" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisDomain" xlink:label="Locator_exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisDomain_3525"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FairValueInputsLevel2Member" xlink:label="Locator_us-gaap_FairValueInputsLevel2Member_3526"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisDomain_3525" xlink:to="Locator_us-gaap_FairValueInputsLevel2Member_3526" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisDomain" xlink:label="Locator_exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisDomain_3527"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FairValueInputsLevel3Member" xlink:label="Locator_us-gaap_FairValueInputsLevel3Member_3528"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisDomain_3527" xlink:to="Locator_us-gaap_FairValueInputsLevel3Member_3528" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueAssetsLiabilitiesMeasuredOnRecurringBasisTable" xlink:label="Locator_exc_FairValueAssetsLiabilitiesMeasuredOnRecurringBasisTable_3509"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisOtherDisclosureItemsAxis" xlink:label="Locator_exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisOtherDisclosureItemsAxis_3510"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_exc_FairValueAssetsLiabilitiesMeasuredOnRecurringBasisTable_3509" xlink:to="Locator_exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisOtherDisclosureItemsAxis_3510" order="2.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisOtherDisclosureItemsAxis" xlink:label="Locator_exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisOtherDisclosureItemsAxis_3313"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisOtherDisclosureItemsDomain" xlink:label="Locator_exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisOtherDisclosureItemsDomain_3314"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="Locator_exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisOtherDisclosureItemsAxis_3313" xlink:to="Locator_exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisOtherDisclosureItemsDomain_3314" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisOtherDisclosureItemsAxis" xlink:label="Locator_exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisOtherDisclosureItemsAxis_3529"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisOtherDisclosureItemsDomain" xlink:label="Locator_exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisOtherDisclosureItemsDomain_3530"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisOtherDisclosureItemsAxis_3529" xlink:to="Locator_exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisOtherDisclosureItemsDomain_3530" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisOtherDisclosureItemsDomain" xlink:label="Locator_exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisOtherDisclosureItemsDomain_3531"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NuclearDecommissioningTrustFundInvestmentsMember" xlink:label="Locator_exc_NuclearDecommissioningTrustFundInvestmentsMember_3532"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisOtherDisclosureItemsDomain_3531" xlink:to="Locator_exc_NuclearDecommissioningTrustFundInvestmentsMember_3532" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisOtherDisclosureItemsDomain" xlink:label="Locator_exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisOtherDisclosureItemsDomain_3533"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PledgedAssetsForZionStationDecommissioningMember" xlink:label="Locator_exc_PledgedAssetsForZionStationDecommissioningMember_3534"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisOtherDisclosureItemsDomain_3533" xlink:to="Locator_exc_PledgedAssetsForZionStationDecommissioningMember_3534" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisOtherDisclosureItemsDomain" xlink:label="Locator_exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisOtherDisclosureItemsDomain_3535"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RabbiTrustInvestmentsMember" xlink:label="Locator_exc_RabbiTrustInvestmentsMember_3536"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisOtherDisclosureItemsDomain_3535" xlink:to="Locator_exc_RabbiTrustInvestmentsMember_3536" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisOtherDisclosureItemsDomain" xlink:label="Locator_exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisOtherDisclosureItemsDomain_3537"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DerivativeFinancialInstrumentsAssetsMember" xlink:label="Locator_us-gaap_DerivativeFinancialInstrumentsAssetsMember_3538"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisOtherDisclosureItemsDomain_3537" xlink:to="Locator_us-gaap_DerivativeFinancialInstrumentsAssetsMember_3538" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisOtherDisclosureItemsDomain" xlink:label="Locator_exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisOtherDisclosureItemsDomain_3539"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DerivativeFinancialInstrumentsLiabilitiesMember" xlink:label="Locator_us-gaap_DerivativeFinancialInstrumentsLiabilitiesMember_3540"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisOtherDisclosureItemsDomain_3539" xlink:to="Locator_us-gaap_DerivativeFinancialInstrumentsLiabilitiesMember_3540" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisFinancialStatementCaptionsLineItems" xlink:label="Locator_exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisFinancialStatementCaptionsLineItems_3541"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisAbstract" xlink:label="Locator_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisAbstract_3542"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisFinancialStatementCaptionsLineItems_3541" xlink:to="Locator_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisAbstract_3542" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisAbstract" xlink:label="Locator_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisAbstract_3543"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CashAndCashEquivalentsFairValueDisclosure" xlink:label="Locator_us-gaap_CashAndCashEquivalentsFairValueDisclosure_3544"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisAbstract_3543" xlink:to="Locator_us-gaap_CashAndCashEquivalentsFairValueDisclosure_3544" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisAbstract" xlink:label="Locator_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisAbstract_3545"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EquitySecuritiesAbstract" xlink:label="Locator_exc_EquitySecuritiesAbstract_3546"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisAbstract_3545" xlink:to="Locator_exc_EquitySecuritiesAbstract_3546" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EquitySecuritiesAbstract" xlink:label="Locator_exc_EquitySecuritiesAbstract_3547"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueAssetsMeasuredOnRecurringBasisEquityInvestments" xlink:label="Locator_exc_FairValueAssetsMeasuredOnRecurringBasisEquityInvestments_3548"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_EquitySecuritiesAbstract_3547" xlink:to="Locator_exc_FairValueAssetsMeasuredOnRecurringBasisEquityInvestments_3548" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EquitySecuritiesAbstract" xlink:label="Locator_exc_EquitySecuritiesAbstract_3549"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueAssetsMeasuredOnRecurringBasisCommingledFunds" xlink:label="Locator_exc_FairValueAssetsMeasuredOnRecurringBasisCommingledFunds_3550"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_EquitySecuritiesAbstract_3549" xlink:to="Locator_exc_FairValueAssetsMeasuredOnRecurringBasisCommingledFunds_3550" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EquitySecuritiesAbstract" xlink:label="Locator_exc_EquitySecuritiesAbstract_3551"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueAssetsMeasuredOnRecurringBasisEquitySecurities" xlink:label="Locator_exc_FairValueAssetsMeasuredOnRecurringBasisEquitySecurities_3552"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_EquitySecuritiesAbstract_3551" xlink:to="Locator_exc_FairValueAssetsMeasuredOnRecurringBasisEquitySecurities_3552" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisAbstract" xlink:label="Locator_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisAbstract_3553"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueAssetsMeasuredOnRecurringBasisFixedIncomeAbstract" xlink:label="Locator_exc_FairValueAssetsMeasuredOnRecurringBasisFixedIncomeAbstract_3554"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisAbstract_3553" xlink:to="Locator_exc_FairValueAssetsMeasuredOnRecurringBasisFixedIncomeAbstract_3554" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueAssetsMeasuredOnRecurringBasisFixedIncomeAbstract" xlink:label="Locator_exc_FairValueAssetsMeasuredOnRecurringBasisFixedIncomeAbstract_3559"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FinancialInstrumentsOwnedOtherSovereignGovernmentObligationsAtFairValue" xlink:label="Locator_us-gaap_FinancialInstrumentsOwnedOtherSovereignGovernmentObligationsAtFairValue_3560"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FairValueAssetsMeasuredOnRecurringBasisFixedIncomeAbstract_3559" xlink:to="Locator_us-gaap_FinancialInstrumentsOwnedOtherSovereignGovernmentObligationsAtFairValue_3560" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueAssetsMeasuredOnRecurringBasisFixedIncomeAbstract" xlink:label="Locator_exc_FairValueAssetsMeasuredOnRecurringBasisFixedIncomeAbstract_3565"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueAssetsMeasuredOnRecurringBasisCommercialMortgageBackedSecurities" xlink:label="Locator_exc_FairValueAssetsMeasuredOnRecurringBasisCommercialMortgageBackedSecurities_3566"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FairValueAssetsMeasuredOnRecurringBasisFixedIncomeAbstract_3565" xlink:to="Locator_exc_FairValueAssetsMeasuredOnRecurringBasisCommercialMortgageBackedSecurities_3566" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueAssetsMeasuredOnRecurringBasisFixedIncomeAbstract" xlink:label="Locator_exc_FairValueAssetsMeasuredOnRecurringBasisFixedIncomeAbstract_3567"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueAssetsMeasuredOnRecurringBasisResidentialMortgageBackedSecurities" xlink:label="Locator_exc_FairValueAssetsMeasuredOnRecurringBasisResidentialMortgageBackedSecurities_3568"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FairValueAssetsMeasuredOnRecurringBasisFixedIncomeAbstract_3567" xlink:to="Locator_exc_FairValueAssetsMeasuredOnRecurringBasisResidentialMortgageBackedSecurities_3568" order="7.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueAssetsMeasuredOnRecurringBasisFixedIncomeAbstract" xlink:label="Locator_exc_FairValueAssetsMeasuredOnRecurringBasisFixedIncomeAbstract_3555"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue" xlink:label="Locator_us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue_3556"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FairValueAssetsMeasuredOnRecurringBasisFixedIncomeAbstract_3555" xlink:to="Locator_us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue_3556" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueAssetsMeasuredOnRecurringBasisFixedIncomeAbstract" xlink:label="Locator_exc_FairValueAssetsMeasuredOnRecurringBasisFixedIncomeAbstract_3557"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FinancialInstrumentsOwnedStateAndMunicipalGovernmentObligationsAtFairValue" xlink:label="Locator_us-gaap_FinancialInstrumentsOwnedStateAndMunicipalGovernmentObligationsAtFairValue_3558"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FairValueAssetsMeasuredOnRecurringBasisFixedIncomeAbstract_3557" xlink:to="Locator_us-gaap_FinancialInstrumentsOwnedStateAndMunicipalGovernmentObligationsAtFairValue_3558" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueAssetsMeasuredOnRecurringBasisFixedIncomeAbstract" xlink:label="Locator_exc_FairValueAssetsMeasuredOnRecurringBasisFixedIncomeAbstract_3561"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FinancialInstrumentsOwnedCorporateDebtAtFairValue" xlink:label="Locator_us-gaap_FinancialInstrumentsOwnedCorporateDebtAtFairValue_3562"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FairValueAssetsMeasuredOnRecurringBasisFixedIncomeAbstract_3561" xlink:to="Locator_us-gaap_FinancialInstrumentsOwnedCorporateDebtAtFairValue_3562" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueAssetsMeasuredOnRecurringBasisFixedIncomeAbstract" xlink:label="Locator_exc_FairValueAssetsMeasuredOnRecurringBasisFixedIncomeAbstract_3563"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueAssetsMeasuredOnRecurringBasisFederalAgencyMortgageBackedSecurities" xlink:label="Locator_exc_FairValueAssetsMeasuredOnRecurringBasisFederalAgencyMortgageBackedSecurities_3564"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FairValueAssetsMeasuredOnRecurringBasisFixedIncomeAbstract_3563" xlink:to="Locator_exc_FairValueAssetsMeasuredOnRecurringBasisFederalAgencyMortgageBackedSecurities_3564" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueAssetsMeasuredOnRecurringBasisFixedIncomeAbstract" xlink:label="Locator_exc_FairValueAssetsMeasuredOnRecurringBasisFixedIncomeAbstract_3569"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CommingledFundsFixedIncomeSecurities" xlink:label="Locator_exc_CommingledFundsFixedIncomeSecurities_3570"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FairValueAssetsMeasuredOnRecurringBasisFixedIncomeAbstract_3569" xlink:to="Locator_exc_CommingledFundsFixedIncomeSecurities_3570" order="8.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueAssetsMeasuredOnRecurringBasisFixedIncomeAbstract" xlink:label="Locator_exc_FairValueAssetsMeasuredOnRecurringBasisFixedIncomeAbstract_3571"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_MutualFundsFixedIncomeSecurities" xlink:label="Locator_exc_MutualFundsFixedIncomeSecurities_3572"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FairValueAssetsMeasuredOnRecurringBasisFixedIncomeAbstract_3571" xlink:to="Locator_exc_MutualFundsFixedIncomeSecurities_3572" order="9.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueAssetsMeasuredOnRecurringBasisFixedIncomeAbstract" xlink:label="Locator_exc_FairValueAssetsMeasuredOnRecurringBasisFixedIncomeAbstract_3573"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueAssetsMeasuredOnRecurringBasisFixedIncomeTotal" xlink:label="Locator_exc_FairValueAssetsMeasuredOnRecurringBasisFixedIncomeTotal_3574"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FairValueAssetsMeasuredOnRecurringBasisFixedIncomeAbstract_3573" xlink:to="Locator_exc_FairValueAssetsMeasuredOnRecurringBasisFixedIncomeTotal_3574" order="10.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisAbstract" xlink:label="Locator_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisAbstract_3575"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueAssetsMeasuredOnRecurringBasisPrivateEquity" xlink:label="Locator_exc_FairValueAssetsMeasuredOnRecurringBasisPrivateEquity_3576"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisAbstract_3575" xlink:to="Locator_exc_FairValueAssetsMeasuredOnRecurringBasisPrivateEquity_3576" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisAbstract" xlink:label="Locator_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisAbstract_3577"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueAssetsMeasuredOnRecurringBasisDirectLendingSecurities" xlink:label="Locator_exc_FairValueAssetsMeasuredOnRecurringBasisDirectLendingSecurities_3578"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisAbstract_3577" xlink:to="Locator_exc_FairValueAssetsMeasuredOnRecurringBasisDirectLendingSecurities_3578" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisAbstract" xlink:label="Locator_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisAbstract_3579"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueAssetsMeasuredOnRecurringBasisOtherDebtObligations" xlink:label="Locator_exc_FairValueAssetsMeasuredOnRecurringBasisOtherDebtObligations_3580"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisAbstract_3579" xlink:to="Locator_exc_FairValueAssetsMeasuredOnRecurringBasisOtherDebtObligations_3580" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisAbstract" xlink:label="Locator_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisAbstract_3581"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueAssetsMeasuredOnRecurringBasisNuclearDecommissioningInvestmentsTotal" xlink:label="Locator_exc_FairValueAssetsMeasuredOnRecurringBasisNuclearDecommissioningInvestmentsTotal_3582"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisAbstract_3581" xlink:to="Locator_exc_FairValueAssetsMeasuredOnRecurringBasisNuclearDecommissioningInvestmentsTotal_3582" order="7.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisAbstract" xlink:label="Locator_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisAbstract_3583"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueAssetsMeasuredOnRecurringBasisPledgedAssetsTotal" xlink:label="Locator_exc_FairValueAssetsMeasuredOnRecurringBasisPledgedAssetsTotal_3584"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisAbstract_3583" xlink:to="Locator_exc_FairValueAssetsMeasuredOnRecurringBasisPledgedAssetsTotal_3584" order="8.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisAbstract" xlink:label="Locator_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisAbstract_3585"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueAssetsMeasuredOnRecurringBasisMutualFunds" xlink:label="Locator_exc_FairValueAssetsMeasuredOnRecurringBasisMutualFunds_3586"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisAbstract_3585" xlink:to="Locator_exc_FairValueAssetsMeasuredOnRecurringBasisMutualFunds_3586" order="9.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisAbstract" xlink:label="Locator_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisAbstract_3587"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueAssetsMeasuredOnRecurringBasisRabbiTrustInvestmentsTotal" xlink:label="Locator_exc_FairValueAssetsMeasuredOnRecurringBasisRabbiTrustInvestmentsTotal_3588"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisAbstract_3587" xlink:to="Locator_exc_FairValueAssetsMeasuredOnRecurringBasisRabbiTrustInvestmentsTotal_3588" order="10.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisAbstract" xlink:label="Locator_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisAbstract_3589"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueMeasuredOnRecurringBasisCashFlowHedges" xlink:label="Locator_exc_FairValueMeasuredOnRecurringBasisCashFlowHedges_3590"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisAbstract_3589" xlink:to="Locator_exc_FairValueMeasuredOnRecurringBasisCashFlowHedges_3590" order="11.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisAbstract" xlink:label="Locator_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisAbstract_3591"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueOnRecurringBasisOtherDerivatives" xlink:label="Locator_exc_FairValueOnRecurringBasisOtherDerivatives_3592"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisAbstract_3591" xlink:to="Locator_exc_FairValueOnRecurringBasisOtherDerivatives_3592" order="12.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisAbstract" xlink:label="Locator_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisAbstract_3593"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueMeasuredOnRecurringBasisProprietaryTrading" xlink:label="Locator_exc_FairValueMeasuredOnRecurringBasisProprietaryTrading_3594"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisAbstract_3593" xlink:to="Locator_exc_FairValueMeasuredOnRecurringBasisProprietaryTrading_3594" order="13.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisAbstract" xlink:label="Locator_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisAbstract_3595"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueOnRecurringBasisEffectOfCollateral" xlink:label="Locator_exc_FairValueOnRecurringBasisEffectOfCollateral_3596"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisAbstract_3595" xlink:to="Locator_exc_FairValueOnRecurringBasisEffectOfCollateral_3596" order="14.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisAbstract" xlink:label="Locator_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisAbstract_3597"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueOnRecurringBasisMarkToMarketTotal" xlink:label="Locator_exc_FairValueOnRecurringBasisMarkToMarketTotal_3598"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisAbstract_3597" xlink:to="Locator_exc_FairValueOnRecurringBasisMarkToMarketTotal_3598" order="15.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisAbstract" xlink:label="Locator_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisAbstract_3599"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueOnRecurringBasisMarkToMarketDerivative" xlink:label="Locator_exc_FairValueOnRecurringBasisMarkToMarketDerivative_3600"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisAbstract_3599" xlink:to="Locator_exc_FairValueOnRecurringBasisMarkToMarketDerivative_3600" order="16.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisAbstract" xlink:label="Locator_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisAbstract_3601"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_InvestmentsFairValueDisclosure" xlink:label="Locator_us-gaap_InvestmentsFairValueDisclosure_3602"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisAbstract_3601" xlink:to="Locator_us-gaap_InvestmentsFairValueDisclosure_3602" order="17.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisAbstract" xlink:label="Locator_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisAbstract_3603"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueLiabilitiesMeasuredOnRecurringBasisDeferredCompensation" xlink:label="Locator_exc_FairValueLiabilitiesMeasuredOnRecurringBasisDeferredCompensation_3604"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisAbstract_3603" xlink:to="Locator_exc_FairValueLiabilitiesMeasuredOnRecurringBasisDeferredCompensation_3604" order="18.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisAbstract" xlink:label="Locator_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisAbstract_3605"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueAssetsMeasuredOnRecurringBasisTotal" xlink:label="Locator_exc_FairValueAssetsMeasuredOnRecurringBasisTotal_3606"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisAbstract_3605" xlink:to="Locator_exc_FairValueAssetsMeasuredOnRecurringBasisTotal_3606" order="19.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisAbstract" xlink:label="Locator_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisAbstract_3607"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueLiabilitiesMeasuredOnRecurringBasisTotal" xlink:label="Locator_exc_FairValueLiabilitiesMeasuredOnRecurringBasisTotal_3608"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisAbstract_3607" xlink:to="Locator_exc_FairValueLiabilitiesMeasuredOnRecurringBasisTotal_3608" order="20.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisAbstract" xlink:label="Locator_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisAbstract_3609"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueAssetAndLiabilitiesMeasuredOnRecurringBasisTotalNet" xlink:label="Locator_exc_FairValueAssetAndLiabilitiesMeasuredOnRecurringBasisTotalNet_3610"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisAbstract_3609" xlink:to="Locator_exc_FairValueAssetAndLiabilitiesMeasuredOnRecurringBasisTotalNet_3610" order="21.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisFinancialStatementCaptionsLineItems" xlink:label="Locator_exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisFinancialStatementCaptionsLineItems_3611"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FootnotesToFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisAbstract" xlink:label="Locator_exc_FootnotesToFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisAbstract_3612"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisFinancialStatementCaptionsLineItems_3611" xlink:to="Locator_exc_FootnotesToFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisAbstract_3612" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FootnotesToFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisAbstract" xlink:label="Locator_exc_FootnotesToFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisAbstract_3613"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueNetAssetsLiabilitiesExcludedFromNuclearDecommissioningTrustFundInvestments" xlink:label="Locator_exc_FairValueNetAssetsLiabilitiesExcludedFromNuclearDecommissioningTrustFundInvestments_3614"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FootnotesToFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisAbstract_3613" xlink:to="Locator_exc_FairValueNetAssetsLiabilitiesExcludedFromNuclearDecommissioningTrustFundInvestments_3614" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FootnotesToFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisAbstract" xlink:label="Locator_exc_FootnotesToFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisAbstract_3615"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueNetAssetsLiabilitiesExcludedFromPledgedAssets" xlink:label="Locator_exc_FairValueNetAssetsLiabilitiesExcludedFromPledgedAssets_3616"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FootnotesToFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisAbstract_3615" xlink:to="Locator_exc_FairValueNetAssetsLiabilitiesExcludedFromPledgedAssets_3616" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FootnotesToFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisAbstract" xlink:label="Locator_exc_FootnotesToFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisAbstract_3617"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SupplementalExecutiveRetirementPlanFairValue" xlink:label="Locator_exc_SupplementalExecutiveRetirementPlanFairValue_3618"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FootnotesToFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisAbstract_3617" xlink:to="Locator_exc_SupplementalExecutiveRetirementPlanFairValue_3618" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FootnotesToFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisAbstract" xlink:label="Locator_exc_FootnotesToFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisAbstract_3619"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CashSurrenderValueOfLifeInsurance" xlink:label="Locator_us-gaap_CashSurrenderValueOfLifeInsurance_3620"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FootnotesToFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisAbstract_3619" xlink:to="Locator_us-gaap_CashSurrenderValueOfLifeInsurance_3620" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FootnotesToFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisAbstract" xlink:label="Locator_exc_FootnotesToFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisAbstract_3621"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DerivativeFairValueAmountOffsetAgainstCollateralNet" xlink:label="Locator_us-gaap_DerivativeFairValueAmountOffsetAgainstCollateralNet_3622"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FootnotesToFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisAbstract_3621" xlink:to="Locator_us-gaap_DerivativeFairValueAmountOffsetAgainstCollateralNet_3622" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FootnotesToFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisAbstract" xlink:label="Locator_exc_FootnotesToFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisAbstract_3623"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueSwapContractCurrentAssets" xlink:label="Locator_exc_FairValueSwapContractCurrentAssets_3624"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FootnotesToFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisAbstract_3623" xlink:to="Locator_exc_FairValueSwapContractCurrentAssets_3624" order="7.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FootnotesToFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisAbstract" xlink:label="Locator_exc_FootnotesToFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisAbstract_3625"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueSwapContractNoncurrentAssets" xlink:label="Locator_exc_FairValueSwapContractNoncurrentAssets_3626"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FootnotesToFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisAbstract_3625" xlink:to="Locator_exc_FairValueSwapContractNoncurrentAssets_3626" order="8.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FootnotesToFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisAbstract" xlink:label="Locator_exc_FootnotesToFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisAbstract_3627"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueEnergySwapUnaffiliatedSuppliersCurrentLiability" xlink:label="Locator_exc_FairValueEnergySwapUnaffiliatedSuppliersCurrentLiability_3628"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FootnotesToFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisAbstract_3627" xlink:to="Locator_exc_FairValueEnergySwapUnaffiliatedSuppliersCurrentLiability_3628" order="9.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FootnotesToFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisAbstract" xlink:label="Locator_exc_FootnotesToFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisAbstract_3629"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueEnergySwapUnaffiliatedSuppliersNoncurrentLiability" xlink:label="Locator_exc_FairValueEnergySwapUnaffiliatedSuppliersNoncurrentLiability_3630"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FootnotesToFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisAbstract_3629" xlink:to="Locator_exc_FairValueEnergySwapUnaffiliatedSuppliersNoncurrentLiability_3630" order="10.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FootnotesToFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisAbstract" xlink:label="Locator_exc_FootnotesToFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisAbstract_3631"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueSwapContractCurrentLiability" xlink:label="Locator_exc_FairValueSwapContractCurrentLiability_3632"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FootnotesToFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisAbstract_3631" xlink:to="Locator_exc_FairValueSwapContractCurrentLiability_3632" order="11.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FootnotesToFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisAbstract" xlink:label="Locator_exc_FootnotesToFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisAbstract_3633"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueSwapContractNoncurrentLiabilities" xlink:label="Locator_exc_FairValueSwapContractNoncurrentLiabilities_3634"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FootnotesToFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisAbstract_3633" xlink:to="Locator_exc_FairValueSwapContractNoncurrentLiabilities_3634" order="12.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FootnotesToFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisAbstract" xlink:label="Locator_exc_FootnotesToFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisAbstract_3635"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueBlockContractCurrentAssets" xlink:label="Locator_exc_FairValueBlockContractCurrentAssets_3636"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FootnotesToFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisAbstract_3635" xlink:to="Locator_exc_FairValueBlockContractCurrentAssets_3636" order="13.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FootnotesToFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisAbstract" xlink:label="Locator_exc_FootnotesToFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisAbstract_3637"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueBlockContractNoncurrentAssets" xlink:label="Locator_exc_FairValueBlockContractNoncurrentAssets_3638"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FootnotesToFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisAbstract_3637" xlink:to="Locator_exc_FairValueBlockContractNoncurrentAssets_3638" order="14.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FootnotesToFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisAbstract" xlink:label="Locator_exc_FootnotesToFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisAbstract_3639"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueBlockContractCurrentLiabilities" xlink:label="Locator_exc_FairValueBlockContractCurrentLiabilities_3640"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FootnotesToFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisAbstract_3639" xlink:to="Locator_exc_FairValueBlockContractCurrentLiabilities_3640" order="15.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FootnotesToFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisAbstract" xlink:label="Locator_exc_FootnotesToFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisAbstract_3641"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueBlockContractNoncurrentLiabilities" xlink:label="Locator_exc_FairValueBlockContractNoncurrentLiabilities_3642"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FootnotesToFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisAbstract_3641" xlink:to="Locator_exc_FairValueBlockContractNoncurrentLiabilities_3642" order="16.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FootnotesToFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisAbstract" xlink:label="Locator_exc_FootnotesToFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisAbstract_3643"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DerivativeLiabilitiesCurrent" xlink:label="Locator_us-gaap_DerivativeLiabilitiesCurrent_3644"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FootnotesToFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisAbstract_3643" xlink:to="Locator_us-gaap_DerivativeLiabilitiesCurrent_3644" order="17.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FootnotesToFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisAbstract" xlink:label="Locator_exc_FootnotesToFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisAbstract_3645"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DerivativeLiabilitiesNoncurrent" xlink:label="Locator_us-gaap_DerivativeLiabilitiesNoncurrent_3646"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FootnotesToFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisAbstract_3645" xlink:to="Locator_us-gaap_DerivativeLiabilitiesNoncurrent_3646" order="18.0" xbrldt:usable="true"/> |
| | </definitionLink> |
| <definitionLink xlink:type="extended" xlink:role="http://exeloncorp.com/role/DisclosureDebtAndCreditAgreementsYearEndTables"> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_3703"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_3704"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_dei_LegalEntityAxis_3703" xlink:to="Locator_dei_EntityDomain_3704" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_3705"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ParentCompanyMember" xlink:label="Locator_us-gaap_ParentCompanyMember_3706"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_3705" xlink:to="Locator_us-gaap_ParentCompanyMember_3706" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_3707"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ExelonGenerationCoLLCMember" xlink:label="Locator_exc_ExelonGenerationCoLLCMember_3708"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_3707" xlink:to="Locator_exc_ExelonGenerationCoLLCMember_3708" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_3709"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CommonwealthEdisonCoMember" xlink:label="Locator_exc_CommonwealthEdisonCoMember_3710"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_3709" xlink:to="Locator_exc_CommonwealthEdisonCoMember_3710" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_3711"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PecoEnergyCoMember" xlink:label="Locator_exc_PecoEnergyCoMember_3712"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_3711" xlink:to="Locator_exc_PecoEnergyCoMember_3712" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_3713"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BaltimoreGasAndElectricCompanyMember" xlink:label="Locator_exc_BaltimoreGasAndElectricCompanyMember_3714"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_3713" xlink:to="Locator_exc_BaltimoreGasAndElectricCompanyMember_3714" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DebtTablesLineItems" xlink:label="Locator_exc_DebtTablesLineItems_3697"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementTable" xlink:label="Locator_us-gaap_StatementTable_3698"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="Locator_exc_DebtTablesLineItems_3697" xlink:to="Locator_us-gaap_StatementTable_3698" order="0.5" xbrldt:contextElement="segment" xbrldt:closed="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementTable" xlink:label="Locator_us-gaap_StatementTable_3701"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_3702"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_us-gaap_StatementTable_3701" xlink:to="Locator_dei_LegalEntityAxis_3702" order="0.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DebtTablesLineItems" xlink:label="Locator_exc_DebtTablesLineItems_3715"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScheduleOfShortTermDebtTextBlock" xlink:label="Locator_us-gaap_ScheduleOfShortTermDebtTextBlock_3716"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_DebtTablesLineItems_3715" xlink:to="Locator_us-gaap_ScheduleOfShortTermDebtTextBlock_3716" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DebtTablesLineItems" xlink:label="Locator_exc_DebtTablesLineItems_3717"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ScheduleOfShortTermBorrowingActivityTextBlock" xlink:label="Locator_exc_ScheduleOfShortTermBorrowingActivityTextBlock_3718"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_DebtTablesLineItems_3717" xlink:to="Locator_exc_ScheduleOfShortTermBorrowingActivityTextBlock_3718" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DebtTablesLineItems" xlink:label="Locator_exc_DebtTablesLineItems_3719"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScheduleOfLineOfCreditFacilitiesTextBlock" xlink:label="Locator_us-gaap_ScheduleOfLineOfCreditFacilitiesTextBlock_3720"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_DebtTablesLineItems_3719" xlink:to="Locator_us-gaap_ScheduleOfLineOfCreditFacilitiesTextBlock_3720" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DebtTablesLineItems" xlink:label="Locator_exc_DebtTablesLineItems_3721"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ScheduleOfCreditAgreementCovenantsTextBlock" xlink:label="Locator_exc_ScheduleOfCreditAgreementCovenantsTextBlock_3722"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_DebtTablesLineItems_3721" xlink:to="Locator_exc_ScheduleOfCreditAgreementCovenantsTextBlock_3722" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DebtTablesLineItems" xlink:label="Locator_exc_DebtTablesLineItems_3723"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScheduleOfDebtInstrumentsTextBlock" xlink:label="Locator_us-gaap_ScheduleOfDebtInstrumentsTextBlock_3724"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_DebtTablesLineItems_3723" xlink:to="Locator_us-gaap_ScheduleOfDebtInstrumentsTextBlock_3724" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DebtTablesLineItems" xlink:label="Locator_exc_DebtTablesLineItems_3725"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ScheduleOfMaturitiesOfLongTermDebtTextBlock" xlink:label="Locator_exc_ScheduleOfMaturitiesOfLongTermDebtTextBlock_3726"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_DebtTablesLineItems_3725" xlink:to="Locator_exc_ScheduleOfMaturitiesOfLongTermDebtTextBlock_3726" order="6.0" xbrldt:usable="true"/> |
| | </definitionLink> |
| <definitionLink xlink:type="extended" xlink:role="http://exeloncorp.com/role/DisclosureDebtAndCreditAgreementsDetails"> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_4009"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_4010"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_dei_LegalEntityAxis_4009" xlink:to="Locator_dei_EntityDomain_4010" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_4011"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ParentCompanyMember" xlink:label="Locator_us-gaap_ParentCompanyMember_4012"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_4011" xlink:to="Locator_us-gaap_ParentCompanyMember_4012" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_4013"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ExelonGenerationCoLLCMember" xlink:label="Locator_exc_ExelonGenerationCoLLCMember_4014"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_4013" xlink:to="Locator_exc_ExelonGenerationCoLLCMember_4014" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_4015"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CommonwealthEdisonCoMember" xlink:label="Locator_exc_CommonwealthEdisonCoMember_4016"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_4015" xlink:to="Locator_exc_CommonwealthEdisonCoMember_4016" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_4017"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PecoEnergyCoMember" xlink:label="Locator_exc_PecoEnergyCoMember_4018"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_4017" xlink:to="Locator_exc_PecoEnergyCoMember_4018" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_4019"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BaltimoreGasAndElectricCompanyMember" xlink:label="Locator_exc_BaltimoreGasAndElectricCompanyMember_4020"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_4019" xlink:to="Locator_exc_BaltimoreGasAndElectricCompanyMember_4020" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ShortTermDebtActivityLineItems" xlink:label="Locator_exc_ShortTermDebtActivityLineItems_3883"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ScheduleOfShortTermDebtActivityTable" xlink:label="Locator_exc_ScheduleOfShortTermDebtActivityTable_3884"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="Locator_exc_ShortTermDebtActivityLineItems_3883" xlink:to="Locator_exc_ScheduleOfShortTermDebtActivityTable_3884" order="0.5" xbrldt:contextElement="segment" xbrldt:closed="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ScheduleOfShortTermDebtActivityTable" xlink:label="Locator_exc_ScheduleOfShortTermDebtActivityTable_4003"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_4004"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_exc_ScheduleOfShortTermDebtActivityTable_4003" xlink:to="Locator_dei_LegalEntityAxis_4004" order="0.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ShortTermDebtActivityLineItems" xlink:label="Locator_exc_ShortTermDebtActivityLineItems_4249"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ShorttermDebtAverageOutstandingAmount" xlink:label="Locator_us-gaap_ShorttermDebtAverageOutstandingAmount_4250"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_ShortTermDebtActivityLineItems_4249" xlink:to="Locator_us-gaap_ShorttermDebtAverageOutstandingAmount_4250" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ShortTermDebtActivityLineItems" xlink:label="Locator_exc_ShortTermDebtActivityLineItems_4251"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ShorttermDebtMaximumAmountOutstandingDuringPeriod" xlink:label="Locator_us-gaap_ShorttermDebtMaximumAmountOutstandingDuringPeriod_4252"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_ShortTermDebtActivityLineItems_4251" xlink:to="Locator_us-gaap_ShorttermDebtMaximumAmountOutstandingDuringPeriod_4252" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ShortTermDebtActivityLineItems" xlink:label="Locator_exc_ShortTermDebtActivityLineItems_4253"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AverageInterestRateComputedOnDailyBasis" xlink:label="Locator_exc_AverageInterestRateComputedOnDailyBasis_4254"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_ShortTermDebtActivityLineItems_4253" xlink:to="Locator_exc_AverageInterestRateComputedOnDailyBasis_4254" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ShortTermDebtActivityLineItems" xlink:label="Locator_exc_ShortTermDebtActivityLineItems_4255"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AverageInterestRateAtPeriodEnd" xlink:label="Locator_exc_AverageInterestRateAtPeriodEnd_4256"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_ShortTermDebtActivityLineItems_4255" xlink:to="Locator_exc_AverageInterestRateAtPeriodEnd_4256" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DebtAndCreditAgreementsAdditionalNarrativeInformationLineItems" xlink:label="Locator_exc_DebtAndCreditAgreementsAdditionalNarrativeInformationLineItems_3897"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DebtAndCreditAgreementsAdditionalNarrativeInformationTable" xlink:label="Locator_exc_DebtAndCreditAgreementsAdditionalNarrativeInformationTable_3898"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="Locator_exc_DebtAndCreditAgreementsAdditionalNarrativeInformationLineItems_3897" xlink:to="Locator_exc_DebtAndCreditAgreementsAdditionalNarrativeInformationTable_3898" order="0.5" xbrldt:contextElement="segment" xbrldt:closed="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DebtAndCreditAgreementsAdditionalNarrativeInformationTable" xlink:label="Locator_exc_DebtAndCreditAgreementsAdditionalNarrativeInformationTable_4007"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_4008"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_exc_DebtAndCreditAgreementsAdditionalNarrativeInformationTable_4007" xlink:to="Locator_dei_LegalEntityAxis_4008" order="0.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DebtAndCreditAgreementsAdditionalNarrativeInformationLineItems" xlink:label="Locator_exc_DebtAndCreditAgreementsAdditionalNarrativeInformationLineItems_4261"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CreditAgreementsAbstract" xlink:label="Locator_exc_CreditAgreementsAbstract_4262"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_DebtAndCreditAgreementsAdditionalNarrativeInformationLineItems_4261" xlink:to="Locator_exc_CreditAgreementsAbstract_4262" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CreditAgreementsAbstract" xlink:label="Locator_exc_CreditAgreementsAbstract_4263"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OriginalUnsecuredRevolvingCreditFacility" xlink:label="Locator_exc_OriginalUnsecuredRevolvingCreditFacility_4264"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_CreditAgreementsAbstract_4263" xlink:to="Locator_exc_OriginalUnsecuredRevolvingCreditFacility_4264" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CreditAgreementsAbstract" xlink:label="Locator_exc_CreditAgreementsAbstract_4265"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AdditionalAmountsAvailableUponRequestUnderCurrentUnsecuredRevolvingCreditFacilities" xlink:label="Locator_exc_AdditionalAmountsAvailableUponRequestUnderCurrentUnsecuredRevolvingCreditFacilities_4266"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_CreditAgreementsAbstract_4265" xlink:to="Locator_exc_AdditionalAmountsAvailableUponRequestUnderCurrentUnsecuredRevolvingCreditFacilities_4266" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CreditAgreementsAbstract" xlink:label="Locator_exc_CreditAgreementsAbstract_4267"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AmountThatWouldConstituteEventOfDefault" xlink:label="Locator_exc_AmountThatWouldConstituteEventOfDefault_4268"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_CreditAgreementsAbstract_4267" xlink:to="Locator_exc_AmountThatWouldConstituteEventOfDefault_4268" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CreditAgreementsAbstract" xlink:label="Locator_exc_CreditAgreementsAbstract_4269"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BasisPointsForPrimeBasedBorrowings" xlink:label="Locator_exc_BasisPointsForPrimeBasedBorrowings_4270"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_CreditAgreementsAbstract_4269" xlink:to="Locator_exc_BasisPointsForPrimeBasedBorrowings_4270" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CreditAgreementsAbstract" xlink:label="Locator_exc_CreditAgreementsAbstract_4271"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BasisPointsForLiborBasedBorrowings" xlink:label="Locator_exc_BasisPointsForLiborBasedBorrowings_4272"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_CreditAgreementsAbstract_4271" xlink:to="Locator_exc_BasisPointsForLiborBasedBorrowings_4272" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CreditAgreementsAbstract" xlink:label="Locator_exc_CreditAgreementsAbstract_4273"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AggregateBankCommitmentsUnderSupplementalUnsecuredRevolvingCreditFacilities" xlink:label="Locator_exc_AggregateBankCommitmentsUnderSupplementalUnsecuredRevolvingCreditFacilities_4274"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_CreditAgreementsAbstract_4273" xlink:to="Locator_exc_AggregateBankCommitmentsUnderSupplementalUnsecuredRevolvingCreditFacilities_4274" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CreditAgreementsAbstract" xlink:label="Locator_exc_CreditAgreementsAbstract_4275"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BasisPointsForCashBorrowings" xlink:label="Locator_exc_BasisPointsForCashBorrowings_4276"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_CreditAgreementsAbstract_4275" xlink:to="Locator_exc_BasisPointsForCashBorrowings_4276" order="7.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CreditAgreementsAbstract" xlink:label="Locator_exc_CreditAgreementsAbstract_4277"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_LettersOfCredit" xlink:label="Locator_exc_LettersOfCredit_4278"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_CreditAgreementsAbstract_4277" xlink:to="Locator_exc_LettersOfCredit_4278" order="8.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CreditAgreementsAbstract" xlink:label="Locator_exc_CreditAgreementsAbstract_4279"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AggregateAvailableBankCommitmentsUnderSupplementalUnsecuredRevolvingCreditFacilities" xlink:label="Locator_exc_AggregateAvailableBankCommitmentsUnderSupplementalUnsecuredRevolvingCreditFacilities_4280"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_CreditAgreementsAbstract_4279" xlink:to="Locator_exc_AggregateAvailableBankCommitmentsUnderSupplementalUnsecuredRevolvingCreditFacilities_4280" order="9.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CreditAgreementsAbstract" xlink:label="Locator_exc_CreditAgreementsAbstract_4281"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AmountOfAggregateAvailableBankCommitmentsUnderSupplementalCreditFacilityExpiresDecember2015" xlink:label="Locator_exc_AmountOfAggregateAvailableBankCommitmentsUnderSupplementalCreditFacilityExpiresDecember2015_4282"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_CreditAgreementsAbstract_4281" xlink:to="Locator_exc_AmountOfAggregateAvailableBankCommitmentsUnderSupplementalCreditFacilityExpiresDecember2015_4282" order="10.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CreditAgreementsAbstract" xlink:label="Locator_exc_CreditAgreementsAbstract_4283"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AmountOfAggregateAvailableBankCommitmentsUnderSupplementalCreditFacilityExpiresMarch2016" xlink:label="Locator_exc_AmountOfAggregateAvailableBankCommitmentsUnderSupplementalCreditFacilityExpiresMarch2016_4284"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_CreditAgreementsAbstract_4283" xlink:to="Locator_exc_AmountOfAggregateAvailableBankCommitmentsUnderSupplementalCreditFacilityExpiresMarch2016_4284" order="11.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CreditAgreementsAbstract" xlink:label="Locator_exc_CreditAgreementsAbstract_4285"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AmountOfAggregateLettersOfCreditAvailable" xlink:label="Locator_exc_AmountOfAggregateLettersOfCreditAvailable_4286"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_CreditAgreementsAbstract_4285" xlink:to="Locator_exc_AmountOfAggregateLettersOfCreditAvailable_4286" order="12.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CreditAgreementsAbstract" xlink:label="Locator_exc_CreditAgreementsAbstract_4287"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BasisPointsForPrimeBasedBorrowingsCurrent" xlink:label="Locator_exc_BasisPointsForPrimeBasedBorrowingsCurrent_4288"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_CreditAgreementsAbstract_4287" xlink:to="Locator_exc_BasisPointsForPrimeBasedBorrowingsCurrent_4288" order="13.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CreditAgreementsAbstract" xlink:label="Locator_exc_CreditAgreementsAbstract_4289"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BasisPointsForLiborBasedBorrowingsCurrent" xlink:label="Locator_exc_BasisPointsForLiborBasedBorrowingsCurrent_4290"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_CreditAgreementsAbstract_4289" xlink:to="Locator_exc_BasisPointsForLiborBasedBorrowingsCurrent_4290" order="14.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CreditAgreementsAbstract" xlink:label="Locator_exc_CreditAgreementsAbstract_4291"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_UnamortizedDebtIssuanceExpense" xlink:label="Locator_us-gaap_UnamortizedDebtIssuanceExpense_4292"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_CreditAgreementsAbstract_4291" xlink:to="Locator_us-gaap_UnamortizedDebtIssuanceExpense_4292" order="15.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CreditAgreementsAbstract" xlink:label="Locator_exc_CreditAgreementsAbstract_4293"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PreviousAggregateCommitmentsOfAcquiredEntity" xlink:label="Locator_exc_PreviousAggregateCommitmentsOfAcquiredEntity_4294"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_CreditAgreementsAbstract_4293" xlink:to="Locator_exc_PreviousAggregateCommitmentsOfAcquiredEntity_4294" order="16.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CreditAgreementsAbstract" xlink:label="Locator_exc_CreditAgreementsAbstract_4295"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AmendedAggregateCommitmentsOfAcquiredEntity" xlink:label="Locator_exc_AmendedAggregateCommitmentsOfAcquiredEntity_4296"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_CreditAgreementsAbstract_4295" xlink:to="Locator_exc_AmendedAggregateCommitmentsOfAcquiredEntity_4296" order="17.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CreditAgreementsAbstract" xlink:label="Locator_exc_CreditAgreementsAbstract_4297"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AggregateBankCommitmentsUnderAmendment" xlink:label="Locator_exc_AggregateBankCommitmentsUnderAmendment_4298"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_CreditAgreementsAbstract_4297" xlink:to="Locator_exc_AggregateBankCommitmentsUnderAmendment_4298" order="18.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CreditAgreementsAbstract" xlink:label="Locator_exc_CreditAgreementsAbstract_4299"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RevolverUnderAmendment" xlink:label="Locator_exc_RevolverUnderAmendment_4300"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_CreditAgreementsAbstract_4299" xlink:to="Locator_exc_RevolverUnderAmendment_4300" order="19.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DebtAndCreditAgreementsAdditionalNarrativeInformationLineItems" xlink:label="Locator_exc_DebtAndCreditAgreementsAdditionalNarrativeInformationLineItems_4301"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AccountsReceivableAgreementAbstract" xlink:label="Locator_exc_AccountsReceivableAgreementAbstract_4302"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_DebtAndCreditAgreementsAdditionalNarrativeInformationLineItems_4301" xlink:to="Locator_exc_AccountsReceivableAgreementAbstract_4302" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AccountsReceivableAgreementAbstract" xlink:label="Locator_exc_AccountsReceivableAgreementAbstract_4303"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PledgedAssetsSeparatelyReportedOnStatementOfFinancialPositionAtFairValue" xlink:label="Locator_us-gaap_PledgedAssetsSeparatelyReportedOnStatementOfFinancialPositionAtFairValue_4304"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_AccountsReceivableAgreementAbstract_4303" xlink:to="Locator_us-gaap_PledgedAssetsSeparatelyReportedOnStatementOfFinancialPositionAtFairValue_4304" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AccountsReceivableAgreementAbstract" xlink:label="Locator_exc_AccountsReceivableAgreementAbstract_4305"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherNotesPayableCurrent" xlink:label="Locator_us-gaap_OtherNotesPayableCurrent_4306"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_AccountsReceivableAgreementAbstract_4305" xlink:to="Locator_us-gaap_OtherNotesPayableCurrent_4306" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AccountsReceivableAgreementAbstract" xlink:label="Locator_exc_AccountsReceivableAgreementAbstract_4307"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ServicingLiabilityAtFairValueAmount" xlink:label="Locator_us-gaap_ServicingLiabilityAtFairValueAmount_4308"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_AccountsReceivableAgreementAbstract_4307" xlink:to="Locator_us-gaap_ServicingLiabilityAtFairValueAmount_4308" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AccountsReceivableAgreementAbstract" xlink:label="Locator_exc_AccountsReceivableAgreementAbstract_4309"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PledgedAssetsNotSeparatelyReportedFinanceReceivables" xlink:label="Locator_us-gaap_PledgedAssetsNotSeparatelyReportedFinanceReceivables_4310"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_AccountsReceivableAgreementAbstract_4309" xlink:to="Locator_us-gaap_PledgedAssetsNotSeparatelyReportedFinanceReceivables_4310" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DebtAndCreditAgreementsAdditionalNarrativeInformationLineItems" xlink:label="Locator_exc_DebtAndCreditAgreementsAdditionalNarrativeInformationLineItems_4311"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AvsrProjectDevelopmentDebtAgreementAbstract" xlink:label="Locator_exc_AvsrProjectDevelopmentDebtAgreementAbstract_4312"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_DebtAndCreditAgreementsAdditionalNarrativeInformationLineItems_4311" xlink:to="Locator_exc_AvsrProjectDevelopmentDebtAgreementAbstract_4312" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AvsrProjectDevelopmentDebtAgreementAbstract" xlink:label="Locator_exc_AvsrProjectDevelopmentDebtAgreementAbstract_4313"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DoeLoanGuarantee" xlink:label="Locator_exc_DoeLoanGuarantee_4314"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_AvsrProjectDevelopmentDebtAgreementAbstract_4313" xlink:to="Locator_exc_DoeLoanGuarantee_4314" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AvsrProjectDevelopmentDebtAgreementAbstract" xlink:label="Locator_exc_AvsrProjectDevelopmentDebtAgreementAbstract_4315"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BasisPointsSpreadForDoeLoanAdvance" xlink:label="Locator_exc_BasisPointsSpreadForDoeLoanAdvance_4316"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_AvsrProjectDevelopmentDebtAgreementAbstract_4315" xlink:to="Locator_exc_BasisPointsSpreadForDoeLoanAdvance_4316" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AvsrProjectDevelopmentDebtAgreementAbstract" xlink:label="Locator_exc_AvsrProjectDevelopmentDebtAgreementAbstract_4317"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DoeInterestRateSwap" xlink:label="Locator_exc_DoeInterestRateSwap_4318"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_AvsrProjectDevelopmentDebtAgreementAbstract_4317" xlink:to="Locator_exc_DoeInterestRateSwap_4318" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AvsrProjectDevelopmentDebtAgreementAbstract" xlink:label="Locator_exc_AvsrProjectDevelopmentDebtAgreementAbstract_4319"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DoeAdvancesReceived" xlink:label="Locator_exc_DoeAdvancesReceived_4320"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_AvsrProjectDevelopmentDebtAgreementAbstract_4319" xlink:to="Locator_exc_DoeAdvancesReceived_4320" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AvsrProjectDevelopmentDebtAgreementAbstract" xlink:label="Locator_exc_AvsrProjectDevelopmentDebtAgreementAbstract_4321"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DoeInterestRateSwapLoanAdvance" xlink:label="Locator_exc_DoeInterestRateSwapLoanAdvance_4322"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_AvsrProjectDevelopmentDebtAgreementAbstract_4321" xlink:to="Locator_exc_DoeInterestRateSwapLoanAdvance_4322" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AvsrProjectDevelopmentDebtAgreementAbstract" xlink:label="Locator_exc_AvsrProjectDevelopmentDebtAgreementAbstract_4323"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DoeLettersOfCreditOutstandingSupport" xlink:label="Locator_exc_DoeLettersOfCreditOutstandingSupport_4324"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_AvsrProjectDevelopmentDebtAgreementAbstract_4323" xlink:to="Locator_exc_DoeLettersOfCreditOutstandingSupport_4324" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AvsrProjectDevelopmentDebtAgreementAbstract" xlink:label="Locator_exc_AvsrProjectDevelopmentDebtAgreementAbstract_4325"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DoeLettersOfCreditIssuedSupport" xlink:label="Locator_exc_DoeLettersOfCreditIssuedSupport_4326"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_AvsrProjectDevelopmentDebtAgreementAbstract_4325" xlink:to="Locator_exc_DoeLettersOfCreditIssuedSupport_4326" order="7.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DebtCovenantLineItems" xlink:label="Locator_exc_DebtCovenantLineItems_3889"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DebtCovenantTable" xlink:label="Locator_exc_DebtCovenantTable_3890"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="Locator_exc_DebtCovenantLineItems_3889" xlink:to="Locator_exc_DebtCovenantTable_3890" order="0.5" xbrldt:contextElement="segment" xbrldt:closed="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DebtCovenantTable" xlink:label="Locator_exc_DebtCovenantTable_4005"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_4006"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_exc_DebtCovenantTable_4005" xlink:to="Locator_dei_LegalEntityAxis_4006" order="0.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DebtCovenantLineItems" xlink:label="Locator_exc_DebtCovenantLineItems_4257"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DebtCovenantMinimumThreshold" xlink:label="Locator_exc_DebtCovenantMinimumThreshold_4258"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_DebtCovenantLineItems_4257" xlink:to="Locator_exc_DebtCovenantMinimumThreshold_4258" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DebtCovenantLineItems" xlink:label="Locator_exc_DebtCovenantLineItems_4259"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DebtCovenantActual" xlink:label="Locator_exc_DebtCovenantActual_4260"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_DebtCovenantLineItems_4259" xlink:to="Locator_exc_DebtCovenantActual_4260" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DebtInstrumentLineItems" xlink:label="Locator_us-gaap_DebtInstrumentLineItems_3821"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DebtInstrumentTable" xlink:label="Locator_us-gaap_DebtInstrumentTable_3822"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="Locator_us-gaap_DebtInstrumentLineItems_3821" xlink:to="Locator_us-gaap_DebtInstrumentTable_3822" order="0.5" xbrldt:contextElement="segment" xbrldt:closed="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DebtInstrumentTable" xlink:label="Locator_us-gaap_DebtInstrumentTable_3985"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_3986"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_us-gaap_DebtInstrumentTable_3985" xlink:to="Locator_dei_LegalEntityAxis_3986" order="0.0"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DebtInstrumentTable" xlink:label="Locator_us-gaap_DebtInstrumentTable_3987"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_LongTermDebtAxis" xlink:label="Locator_exc_LongTermDebtAxis_3988"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_us-gaap_DebtInstrumentTable_3987" xlink:to="Locator_exc_LongTermDebtAxis_3988" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_LongTermDebtAxis" xlink:label="Locator_exc_LongTermDebtAxis_3743"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_LongTermDebtDomain" xlink:label="Locator_exc_LongTermDebtDomain_3744"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="Locator_exc_LongTermDebtAxis_3743" xlink:to="Locator_exc_LongTermDebtDomain_3744" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_LongTermDebtAxis" xlink:label="Locator_exc_LongTermDebtAxis_4021"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_LongTermDebtDomain" xlink:label="Locator_exc_LongTermDebtDomain_4022"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_exc_LongTermDebtAxis_4021" xlink:to="Locator_exc_LongTermDebtDomain_4022" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_LongTermDebtDomain" xlink:label="Locator_exc_LongTermDebtDomain_4023"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_LongTermDebtIssuancesMember" xlink:label="Locator_exc_LongTermDebtIssuancesMember_4024"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_LongTermDebtDomain_4023" xlink:to="Locator_exc_LongTermDebtIssuancesMember_4024" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_LongTermDebtDomain" xlink:label="Locator_exc_LongTermDebtDomain_4025"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_LongTermDebtRetirementsMember" xlink:label="Locator_exc_LongTermDebtRetirementsMember_4026"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_LongTermDebtDomain_4025" xlink:to="Locator_exc_LongTermDebtRetirementsMember_4026" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_LongTermDebtDomain" xlink:label="Locator_exc_LongTermDebtDomain_4027"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_LongTermDebtAssumedMember" xlink:label="Locator_exc_LongTermDebtAssumedMember_4028"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_LongTermDebtDomain_4027" xlink:to="Locator_exc_LongTermDebtAssumedMember_4028" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_LongTermDebtDomain" xlink:label="Locator_exc_LongTermDebtDomain_4029"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_LongTermDebtExchangeOfferIssuedAndSoldMember" xlink:label="Locator_exc_LongTermDebtExchangeOfferIssuedAndSoldMember_4030"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_LongTermDebtDomain_4029" xlink:to="Locator_exc_LongTermDebtExchangeOfferIssuedAndSoldMember_4030" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_LongTermDebtDomain" xlink:label="Locator_exc_LongTermDebtDomain_4031"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_LongTermDebtExchangeOfferPurchasedMember" xlink:label="Locator_exc_LongTermDebtExchangeOfferPurchasedMember_4032"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_LongTermDebtDomain_4031" xlink:to="Locator_exc_LongTermDebtExchangeOfferPurchasedMember_4032" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_LongTermDebtDomain" xlink:label="Locator_exc_LongTermDebtDomain_4033"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_LongTermDebtExchangeOfferExchangedMember" xlink:label="Locator_exc_LongTermDebtExchangeOfferExchangedMember_4034"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_LongTermDebtDomain_4033" xlink:to="Locator_exc_LongTermDebtExchangeOfferExchangedMember_4034" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_LongTermDebtDomain" xlink:label="Locator_exc_LongTermDebtDomain_4035"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ProceedsFromIssuanceOfDebtMember" xlink:label="Locator_exc_ProceedsFromIssuanceOfDebtMember_4036"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_LongTermDebtDomain_4035" xlink:to="Locator_exc_ProceedsFromIssuanceOfDebtMember_4036" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_LongTermDebtDomain" xlink:label="Locator_exc_LongTermDebtDomain_4037"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RepaymentOfDebtMember" xlink:label="Locator_us-gaap_RepaymentOfDebtMember_4038"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_LongTermDebtDomain_4037" xlink:to="Locator_us-gaap_RepaymentOfDebtMember_4038" order="7.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DebtInstrumentTable" xlink:label="Locator_us-gaap_DebtInstrumentTable_3989"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LongtermDebtTypeAxis" xlink:label="Locator_us-gaap_LongtermDebtTypeAxis_3990"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_us-gaap_DebtInstrumentTable_3989" xlink:to="Locator_us-gaap_LongtermDebtTypeAxis_3990" order="2.0"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LongtermDebtTypeAxis" xlink:label="Locator_us-gaap_LongtermDebtTypeAxis_3745"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LongtermDebtTypeDomain" xlink:label="Locator_us-gaap_LongtermDebtTypeDomain_3746"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="Locator_us-gaap_LongtermDebtTypeAxis_3745" xlink:to="Locator_us-gaap_LongtermDebtTypeDomain_3746" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LongtermDebtTypeAxis" xlink:label="Locator_us-gaap_LongtermDebtTypeAxis_4039"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LongtermDebtTypeDomain" xlink:label="Locator_us-gaap_LongtermDebtTypeDomain_4040"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_us-gaap_LongtermDebtTypeAxis_4039" xlink:to="Locator_us-gaap_LongtermDebtTypeDomain_4040" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LongtermDebtTypeDomain" xlink:label="Locator_us-gaap_LongtermDebtTypeDomain_4041"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CapitalLeaseObligationsMember" xlink:label="Locator_us-gaap_CapitalLeaseObligationsMember_4042"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_LongtermDebtTypeDomain_4041" xlink:to="Locator_us-gaap_CapitalLeaseObligationsMember_4042" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LongtermDebtTypeDomain" xlink:label="Locator_us-gaap_LongtermDebtTypeDomain_4043"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NotesPayableToBanksMember" xlink:label="Locator_us-gaap_NotesPayableToBanksMember_4044"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_LongtermDebtTypeDomain_4043" xlink:to="Locator_us-gaap_NotesPayableToBanksMember_4044" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LongtermDebtTypeDomain" xlink:label="Locator_us-gaap_LongtermDebtTypeDomain_4045"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_SeniorNotesMember" xlink:label="Locator_us-gaap_SeniorNotesMember_4046"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_LongtermDebtTypeDomain_4045" xlink:to="Locator_us-gaap_SeniorNotesMember_4046" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LongtermDebtTypeDomain" xlink:label="Locator_us-gaap_LongtermDebtTypeDomain_4047"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FirstMortgageBondsMember" xlink:label="Locator_exc_FirstMortgageBondsMember_4048"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_LongtermDebtTypeDomain_4047" xlink:to="Locator_exc_FirstMortgageBondsMember_4048" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LongtermDebtTypeDomain" xlink:label="Locator_us-gaap_LongtermDebtTypeDomain_4049"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PollutionControlNotesMember" xlink:label="Locator_exc_PollutionControlNotesMember_4050"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_LongtermDebtTypeDomain_4049" xlink:to="Locator_exc_PollutionControlNotesMember_4050" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LongtermDebtTypeDomain" xlink:label="Locator_us-gaap_LongtermDebtTypeDomain_4051"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SinkingFundDebenturesMember" xlink:label="Locator_exc_SinkingFundDebenturesMember_4052"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_LongtermDebtTypeDomain_4051" xlink:to="Locator_exc_SinkingFundDebenturesMember_4052" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LongtermDebtTypeDomain" xlink:label="Locator_us-gaap_LongtermDebtTypeDomain_4053"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SuboridantedDebenturesMember" xlink:label="Locator_exc_SuboridantedDebenturesMember_4054"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_LongtermDebtTypeDomain_4053" xlink:to="Locator_exc_SuboridantedDebenturesMember_4054" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LongtermDebtTypeDomain" xlink:label="Locator_us-gaap_LongtermDebtTypeDomain_4055"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DoeFinancingProjectMember" xlink:label="Locator_exc_DoeFinancingProjectMember_4056"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_LongtermDebtTypeDomain_4055" xlink:to="Locator_exc_DoeFinancingProjectMember_4056" order="7.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LongtermDebtTypeDomain" xlink:label="Locator_us-gaap_LongtermDebtTypeDomain_4057"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NontaxableMunicipalBondsMember" xlink:label="Locator_us-gaap_NontaxableMunicipalBondsMember_4058"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_LongtermDebtTypeDomain_4057" xlink:to="Locator_us-gaap_NontaxableMunicipalBondsMember_4058" order="8.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LongtermDebtTypeDomain" xlink:label="Locator_us-gaap_LongtermDebtTypeDomain_4059"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RevolvingCreditFacilityMember" xlink:label="Locator_exc_RevolvingCreditFacilityMember_4060"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_LongtermDebtTypeDomain_4059" xlink:to="Locator_exc_RevolvingCreditFacilityMember_4060" order="9.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DebtInstrumentTable" xlink:label="Locator_us-gaap_DebtInstrumentTable_3991"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_LongTermDebtInterestRateTypeAxis" xlink:label="Locator_exc_LongTermDebtInterestRateTypeAxis_3992"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_us-gaap_DebtInstrumentTable_3991" xlink:to="Locator_exc_LongTermDebtInterestRateTypeAxis_3992" order="3.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_LongTermDebtInterestRateTypeAxis" xlink:label="Locator_exc_LongTermDebtInterestRateTypeAxis_3747"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_LongTermDebtInterestRateTypeDomain" xlink:label="Locator_exc_LongTermDebtInterestRateTypeDomain_3748"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="Locator_exc_LongTermDebtInterestRateTypeAxis_3747" xlink:to="Locator_exc_LongTermDebtInterestRateTypeDomain_3748" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_LongTermDebtInterestRateTypeAxis" xlink:label="Locator_exc_LongTermDebtInterestRateTypeAxis_4061"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_LongTermDebtInterestRateTypeDomain" xlink:label="Locator_exc_LongTermDebtInterestRateTypeDomain_4062"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_exc_LongTermDebtInterestRateTypeAxis_4061" xlink:to="Locator_exc_LongTermDebtInterestRateTypeDomain_4062" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_LongTermDebtInterestRateTypeDomain" xlink:label="Locator_exc_LongTermDebtInterestRateTypeDomain_4063"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FixedRateDebtMember" xlink:label="Locator_exc_FixedRateDebtMember_4064"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_LongTermDebtInterestRateTypeDomain_4063" xlink:to="Locator_exc_FixedRateDebtMember_4064" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_LongTermDebtInterestRateTypeDomain" xlink:label="Locator_exc_LongTermDebtInterestRateTypeDomain_4065"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FloatingRateDebtMember" xlink:label="Locator_exc_FloatingRateDebtMember_4066"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_LongTermDebtInterestRateTypeDomain_4065" xlink:to="Locator_exc_FloatingRateDebtMember_4066" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DebtInstrumentTable" xlink:label="Locator_us-gaap_DebtInstrumentTable_3993"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DebtInstrumentAxis" xlink:label="Locator_us-gaap_DebtInstrumentAxis_3994"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_us-gaap_DebtInstrumentTable_3993" xlink:to="Locator_us-gaap_DebtInstrumentAxis_3994" order="4.0"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DebtInstrumentAxis" xlink:label="Locator_us-gaap_DebtInstrumentAxis_3749"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="Locator_us-gaap_DebtInstrumentNameDomain_3750"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="Locator_us-gaap_DebtInstrumentAxis_3749" xlink:to="Locator_us-gaap_DebtInstrumentNameDomain_3750" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DebtInstrumentAxis" xlink:label="Locator_us-gaap_DebtInstrumentAxis_4067"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="Locator_us-gaap_DebtInstrumentNameDomain_4068"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_us-gaap_DebtInstrumentAxis_4067" xlink:to="Locator_us-gaap_DebtInstrumentNameDomain_4068" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="Locator_us-gaap_DebtInstrumentNameDomain_4069"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SeniorNotes425June152022Member" xlink:label="Locator_exc_SeniorNotes425June152022Member_4070"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DebtInstrumentNameDomain_4069" xlink:to="Locator_exc_SeniorNotes425June152022Member_4070" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="Locator_us-gaap_DebtInstrumentNameDomain_4071"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SeniorNotes56June152042Member" xlink:label="Locator_exc_SeniorNotes56June152042Member_4072"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DebtInstrumentNameDomain_4071" xlink:to="Locator_exc_SeniorNotes56June152042Member_4072" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="Locator_us-gaap_DebtInstrumentNameDomain_4073"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FirstMortgageBonds1625January152014Member" xlink:label="Locator_exc_FirstMortgageBonds1625January152014Member_4074"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DebtInstrumentNameDomain_4073" xlink:to="Locator_exc_FirstMortgageBonds1625January152014Member_4074" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="Locator_us-gaap_DebtInstrumentNameDomain_4075"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FirstMortgageBondSeries9876April12032Member" xlink:label="Locator_exc_FirstMortgageBondSeries9876April12032Member_4076"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DebtInstrumentNameDomain_4075" xlink:to="Locator_exc_FirstMortgageBondSeries9876April12032Member_4076" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="Locator_us-gaap_DebtInstrumentNameDomain_4077"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_KennettSquareCapitalLease783September202020Member" xlink:label="Locator_exc_KennettSquareCapitalLease783September202020Member_4078"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DebtInstrumentNameDomain_4077" xlink:to="Locator_exc_KennettSquareCapitalLease783September202020Member_4078" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="Locator_us-gaap_DebtInstrumentNameDomain_4079"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SinkingFundDebentures475December12011Member" xlink:label="Locator_exc_SinkingFundDebentures475December12011Member_4080"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DebtInstrumentNameDomain_4079" xlink:to="Locator_exc_SinkingFundDebentures475December12011Member_4080" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="Locator_us-gaap_DebtInstrumentNameDomain_4081"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SeniorNotes76Due2032Member" xlink:label="Locator_exc_SeniorNotes76Due2032Member_4082"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DebtInstrumentNameDomain_4081" xlink:to="Locator_exc_SeniorNotes76Due2032Member_4082" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="Locator_us-gaap_DebtInstrumentNameDomain_4083"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FixedRateNote455Due2015Member" xlink:label="Locator_exc_FixedRateNote455Due2015Member_4084"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DebtInstrumentNameDomain_4083" xlink:to="Locator_exc_FixedRateNote455Due2015Member_4084" order="7.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="Locator_us-gaap_DebtInstrumentNameDomain_4085"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SeriesAJuniorSubordinatedDebentures8625Due2063Member" xlink:label="Locator_exc_SeriesAJuniorSubordinatedDebentures8625Due2063Member_4086"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DebtInstrumentNameDomain_4085" xlink:to="Locator_exc_SeriesAJuniorSubordinatedDebentures8625Due2063Member_4086" order="8.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="Locator_us-gaap_DebtInstrumentNameDomain_4087"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_Notes515Due2020Member" xlink:label="Locator_exc_Notes515Due2020Member_4088"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DebtInstrumentNameDomain_4087" xlink:to="Locator_exc_Notes515Due2020Member_4088" order="9.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="Locator_us-gaap_DebtInstrumentNameDomain_4089"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DoeProjectFinancing3092January22037Member" xlink:label="Locator_exc_DoeProjectFinancing3092January22037Member_4090"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DebtInstrumentNameDomain_4089" xlink:to="Locator_exc_DoeProjectFinancing3092January22037Member_4090" order="10.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="Locator_us-gaap_DebtInstrumentNameDomain_4091"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FirstMortgageBonds615March152012Member" xlink:label="Locator_exc_FirstMortgageBonds615March152012Member_4092"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DebtInstrumentNameDomain_4091" xlink:to="Locator_exc_FirstMortgageBonds615March152012Member_4092" order="11.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="Locator_us-gaap_DebtInstrumentNameDomain_4093"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RateStabilizationBonds568April12017Member" xlink:label="Locator_exc_RateStabilizationBonds568April12017Member_4094"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DebtInstrumentNameDomain_4093" xlink:to="Locator_exc_RateStabilizationBonds568April12017Member_4094" order="12.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="Locator_us-gaap_DebtInstrumentNameDomain_4095"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_MediumTermNotes673675June152012Member" xlink:label="Locator_exc_MediumTermNotes673675June152012Member_4096"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DebtInstrumentNameDomain_4095" xlink:to="Locator_exc_MediumTermNotes673675June152012Member_4096" order="13.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="Locator_us-gaap_DebtInstrumentNameDomain_4097"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ArmstrongCoTaxExempt5December12042Member" xlink:label="Locator_exc_ArmstrongCoTaxExempt5December12042Member_4098"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DebtInstrumentNameDomain_4097" xlink:to="Locator_exc_ArmstrongCoTaxExempt5December12042Member_4098" order="14.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="Locator_us-gaap_DebtInstrumentNameDomain_4099"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SeniorNotes76April12032Member" xlink:label="Locator_exc_SeniorNotes76April12032Member_4100"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DebtInstrumentNameDomain_4099" xlink:to="Locator_exc_SeniorNotes76April12032Member_4100" order="15.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="Locator_us-gaap_DebtInstrumentNameDomain_4101"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_MediumTermNotes73June12012Member" xlink:label="Locator_exc_MediumTermNotes73June12012Member_4102"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DebtInstrumentNameDomain_4101" xlink:to="Locator_exc_MediumTermNotes73June12012Member_4102" order="16.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="Locator_us-gaap_DebtInstrumentNameDomain_4103"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CeuCreditAgreementMember" xlink:label="Locator_exc_CeuCreditAgreementMember_4104"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DebtInstrumentNameDomain_4103" xlink:to="Locator_exc_CeuCreditAgreementMember_4104" order="17.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="Locator_us-gaap_DebtInstrumentNameDomain_4105"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_TenYearNotesMember" xlink:label="Locator_exc_TenYearNotesMember_4106"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DebtInstrumentNameDomain_4105" xlink:to="Locator_exc_TenYearNotesMember_4106" order="18.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="Locator_us-gaap_DebtInstrumentNameDomain_4107"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FirstAndRefundingMortgageBonds2375September152022Member" xlink:label="Locator_exc_FirstAndRefundingMortgageBonds2375September152022Member_4108"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DebtInstrumentNameDomain_4107" xlink:to="Locator_exc_FirstAndRefundingMortgageBonds2375September152022Member_4108" order="19.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="Locator_us-gaap_DebtInstrumentNameDomain_4109"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FirstMortgageBonds3800October12042Member" xlink:label="Locator_exc_FirstMortgageBonds3800October12042Member_4110"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DebtInstrumentNameDomain_4109" xlink:to="Locator_exc_FirstMortgageBonds3800October12042Member_4110" order="20.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="Locator_us-gaap_DebtInstrumentNameDomain_4111"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FirstMortgageBonds1950September12016Member" xlink:label="Locator_exc_FirstMortgageBonds1950September12016Member_4112"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DebtInstrumentNameDomain_4111" xlink:to="Locator_exc_FirstMortgageBonds1950September12016Member_4112" order="21.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="Locator_us-gaap_DebtInstrumentNameDomain_4113"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FirstMortgageBonds3400September12021Member" xlink:label="Locator_exc_FirstMortgageBonds3400September12021Member_4114"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DebtInstrumentNameDomain_4113" xlink:to="Locator_exc_FirstMortgageBonds3400September12021Member_4114" order="22.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="Locator_us-gaap_DebtInstrumentNameDomain_4115"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FirstMortgageBonds5400December152011Member" xlink:label="Locator_exc_FirstMortgageBonds5400December152011Member_4116"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DebtInstrumentNameDomain_4115" xlink:to="Locator_exc_FirstMortgageBonds5400December152011Member_4116" order="23.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="Locator_us-gaap_DebtInstrumentNameDomain_4117"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FirstAndRefundingMortgageBonds4750October12012Member" xlink:label="Locator_exc_FirstAndRefundingMortgageBonds4750October12012Member_4118"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DebtInstrumentNameDomain_4117" xlink:to="Locator_exc_FirstAndRefundingMortgageBonds4750October12012Member_4118" order="24.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="Locator_us-gaap_DebtInstrumentNameDomain_4119"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CleanHorizonsMember" xlink:label="Locator_exc_CleanHorizonsMember_4120"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DebtInstrumentNameDomain_4119" xlink:to="Locator_exc_CleanHorizonsMember_4120" order="25.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="Locator_us-gaap_DebtInstrumentNameDomain_4121"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_MedcoTaxExemptBondsMember" xlink:label="Locator_exc_MedcoTaxExemptBondsMember_4122"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DebtInstrumentNameDomain_4121" xlink:to="Locator_exc_MedcoTaxExemptBondsMember_4122" order="26.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DebtInstrumentLineItems" xlink:label="Locator_us-gaap_DebtInstrumentLineItems_4135"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LongTermDebtAbstract" xlink:label="Locator_us-gaap_LongTermDebtAbstract_4136"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DebtInstrumentLineItems_4135" xlink:to="Locator_us-gaap_LongTermDebtAbstract_4136" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LongTermDebtAbstract" xlink:label="Locator_us-gaap_LongTermDebtAbstract_4137"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_SecuredLongTermDebt" xlink:label="Locator_us-gaap_SecuredLongTermDebt_4138"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_LongTermDebtAbstract_4137" xlink:to="Locator_us-gaap_SecuredLongTermDebt_4138" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LongTermDebtAbstract" xlink:label="Locator_us-gaap_LongTermDebtAbstract_4139"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_UnsecuredLongTermDebt" xlink:label="Locator_us-gaap_UnsecuredLongTermDebt_4140"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_LongTermDebtAbstract_4139" xlink:to="Locator_us-gaap_UnsecuredLongTermDebt_4140" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LongTermDebtAbstract" xlink:label="Locator_us-gaap_LongTermDebtAbstract_4141"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LongTermNotesPayable" xlink:label="Locator_us-gaap_LongTermNotesPayable_4142"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_LongTermDebtAbstract_4141" xlink:to="Locator_us-gaap_LongTermNotesPayable_4142" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LongTermDebtAbstract" xlink:label="Locator_us-gaap_LongTermDebtAbstract_4143"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LongTermPollutionControlBond" xlink:label="Locator_us-gaap_LongTermPollutionControlBond_4144"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_LongTermDebtAbstract_4143" xlink:to="Locator_us-gaap_LongTermPollutionControlBond_4144" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LongTermDebtAbstract" xlink:label="Locator_us-gaap_LongTermDebtAbstract_4145"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SinkingFundDebentures" xlink:label="Locator_exc_SinkingFundDebentures_4146"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_LongTermDebtAbstract_4145" xlink:to="Locator_exc_SinkingFundDebentures_4146" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LongTermDebtAbstract" xlink:label="Locator_us-gaap_LongTermDebtAbstract_4147"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_LongTermDebtExcludingRelatedPartyDebt" xlink:label="Locator_exc_LongTermDebtExcludingRelatedPartyDebt_4148"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_LongTermDebtAbstract_4147" xlink:to="Locator_exc_LongTermDebtExcludingRelatedPartyDebt_4148" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LongTermDebtAbstract" xlink:label="Locator_us-gaap_LongTermDebtAbstract_4149"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DebtInstrumentUnamortizedDiscountPremiumNet" xlink:label="Locator_us-gaap_DebtInstrumentUnamortizedDiscountPremiumNet_4150"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_LongTermDebtAbstract_4149" xlink:to="Locator_us-gaap_DebtInstrumentUnamortizedDiscountPremiumNet_4150" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LongTermDebtAbstract" xlink:label="Locator_us-gaap_LongTermDebtAbstract_4151"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_UnamortizedSettledFairValueHedgeNet" xlink:label="Locator_exc_UnamortizedSettledFairValueHedgeNet_4152"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_LongTermDebtAbstract_4151" xlink:to="Locator_exc_UnamortizedSettledFairValueHedgeNet_4152" order="7.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LongTermDebtAbstract" xlink:label="Locator_us-gaap_LongTermDebtAbstract_4153"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueCarryingValueAdjustmentNet" xlink:label="Locator_exc_FairValueCarryingValueAdjustmentNet_4154"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_LongTermDebtAbstract_4153" xlink:to="Locator_exc_FairValueCarryingValueAdjustmentNet_4154" order="8.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LongTermDebtAbstract" xlink:label="Locator_us-gaap_LongTermDebtAbstract_4155"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherLongTermDebtCurrent" xlink:label="Locator_us-gaap_OtherLongTermDebtCurrent_4156"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_LongTermDebtAbstract_4155" xlink:to="Locator_us-gaap_OtherLongTermDebtCurrent_4156" order="9.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LongTermDebtAbstract" xlink:label="Locator_us-gaap_LongTermDebtAbstract_4157"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LongTermDebtNoncurrent" xlink:label="Locator_us-gaap_LongTermDebtNoncurrent_4158"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_LongTermDebtAbstract_4157" xlink:to="Locator_us-gaap_LongTermDebtNoncurrent_4158" order="10.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LongTermDebtAbstract" xlink:label="Locator_us-gaap_LongTermDebtAbstract_4159"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LongtermTransitionBondCurrent" xlink:label="Locator_us-gaap_LongtermTransitionBondCurrent_4160"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_LongTermDebtAbstract_4159" xlink:to="Locator_us-gaap_LongtermTransitionBondCurrent_4160" order="11.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LongTermDebtAbstract" xlink:label="Locator_us-gaap_LongTermDebtAbstract_4161"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DueToAffiliateCurrentAndNoncurrent" xlink:label="Locator_us-gaap_DueToAffiliateCurrentAndNoncurrent_4162"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_LongTermDebtAbstract_4161" xlink:to="Locator_us-gaap_DueToAffiliateCurrentAndNoncurrent_4162" order="12.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LongTermDebtAbstract" xlink:label="Locator_us-gaap_LongTermDebtAbstract_4163"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DueToRelatedPartiesCurrentAndNoncurrent" xlink:label="Locator_us-gaap_DueToRelatedPartiesCurrentAndNoncurrent_4164"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_LongTermDebtAbstract_4163" xlink:to="Locator_us-gaap_DueToRelatedPartiesCurrentAndNoncurrent_4164" order="13.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LongTermDebtAbstract" xlink:label="Locator_us-gaap_LongTermDebtAbstract_4165"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DueToRelatedPartiesNoncurrent" xlink:label="Locator_us-gaap_DueToRelatedPartiesNoncurrent_4166"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_LongTermDebtAbstract_4165" xlink:to="Locator_us-gaap_DueToRelatedPartiesNoncurrent_4166" order="14.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LongTermDebtAbstract" xlink:label="Locator_us-gaap_LongTermDebtAbstract_4167"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage" xlink:label="Locator_us-gaap_DebtInstrumentInterestRateStatedPercentage_4168"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_LongTermDebtAbstract_4167" xlink:to="Locator_us-gaap_DebtInstrumentInterestRateStatedPercentage_4168" order="15.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LongTermDebtAbstract" xlink:label="Locator_us-gaap_LongTermDebtAbstract_4169"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentageRateRangeMinimum" xlink:label="Locator_us-gaap_DebtInstrumentInterestRateStatedPercentageRateRangeMinimum_4170"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_LongTermDebtAbstract_4169" xlink:to="Locator_us-gaap_DebtInstrumentInterestRateStatedPercentageRateRangeMinimum_4170" order="16.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LongTermDebtAbstract" xlink:label="Locator_us-gaap_LongTermDebtAbstract_4171"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentageRateRangeMaximum" xlink:label="Locator_us-gaap_DebtInstrumentInterestRateStatedPercentageRateRangeMaximum_4172"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_LongTermDebtAbstract_4171" xlink:to="Locator_us-gaap_DebtInstrumentInterestRateStatedPercentageRateRangeMaximum_4172" order="17.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LongTermDebtAbstract" xlink:label="Locator_us-gaap_LongTermDebtAbstract_4173"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_MaturityDateForDebtInstrument" xlink:label="Locator_exc_MaturityDateForDebtInstrument_4174"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_LongTermDebtAbstract_4173" xlink:to="Locator_exc_MaturityDateForDebtInstrument_4174" order="18.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LongTermDebtAbstract" xlink:label="Locator_us-gaap_LongTermDebtAbstract_4175"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DebtInstrumentMaturityDateRangeStart" xlink:label="Locator_us-gaap_DebtInstrumentMaturityDateRangeStart_4176"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_LongTermDebtAbstract_4175" xlink:to="Locator_us-gaap_DebtInstrumentMaturityDateRangeStart_4176" order="19.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LongTermDebtAbstract" xlink:label="Locator_us-gaap_LongTermDebtAbstract_4177"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DebtInstrumentMaturityDateRangeEnd" xlink:label="Locator_us-gaap_DebtInstrumentMaturityDateRangeEnd_4178"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_LongTermDebtAbstract_4177" xlink:to="Locator_us-gaap_DebtInstrumentMaturityDateRangeEnd_4178" order="20.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LongTermDebtAbstract" xlink:label="Locator_us-gaap_LongTermDebtAbstract_4179"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LongTermDebt" xlink:label="Locator_us-gaap_LongTermDebt_4180"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_LongTermDebtAbstract_4179" xlink:to="Locator_us-gaap_LongTermDebt_4180" order="21.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LongTermDebtAbstract" xlink:label="Locator_us-gaap_LongTermDebtAbstract_4181"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_LongTermDebtOldNotes" xlink:label="Locator_exc_LongTermDebtOldNotes_4182"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_LongTermDebtAbstract_4181" xlink:to="Locator_exc_LongTermDebtOldNotes_4182" order="22.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LongTermDebtAbstract" xlink:label="Locator_us-gaap_LongTermDebtAbstract_4183"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CashPaymentRelatedToExchangeOffer" xlink:label="Locator_exc_CashPaymentRelatedToExchangeOffer_4184"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_LongTermDebtAbstract_4183" xlink:to="Locator_exc_CashPaymentRelatedToExchangeOffer_4184" order="23.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LongTermDebtAbstract" xlink:label="Locator_us-gaap_LongTermDebtAbstract_4185"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_LongTermDebtFairValueAfterPurchaseAcoounting" xlink:label="Locator_exc_LongTermDebtFairValueAfterPurchaseAcoounting_4186"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_LongTermDebtAbstract_4185" xlink:to="Locator_exc_LongTermDebtFairValueAfterPurchaseAcoounting_4186" order="24.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LongTermDebtAbstract" xlink:label="Locator_us-gaap_LongTermDebtAbstract_4187"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_GainFromExchangeOffer" xlink:label="Locator_exc_GainFromExchangeOffer_4188"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_LongTermDebtAbstract_4187" xlink:to="Locator_exc_GainFromExchangeOffer_4188" order="25.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LongTermDebtAbstract" xlink:label="Locator_us-gaap_LongTermDebtAbstract_4189"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DoeAdvancesReceivedOctober12012" xlink:label="Locator_exc_DoeAdvancesReceivedOctober12012_4190"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_LongTermDebtAbstract_4189" xlink:to="Locator_exc_DoeAdvancesReceivedOctober12012_4190" order="26.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LongTermDebtAbstract" xlink:label="Locator_us-gaap_LongTermDebtAbstract_4191"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DoeAdvancesReceivedOctober312012" xlink:label="Locator_exc_DoeAdvancesReceivedOctober312012_4192"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_LongTermDebtAbstract_4191" xlink:to="Locator_exc_DoeAdvancesReceivedOctober312012_4192" order="27.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LongTermDebtAbstract" xlink:label="Locator_us-gaap_LongTermDebtAbstract_4193"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DebtInstrumentInterestRateTerms" xlink:label="Locator_us-gaap_DebtInstrumentInterestRateTerms_4194"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_LongTermDebtAbstract_4193" xlink:to="Locator_us-gaap_DebtInstrumentInterestRateTerms_4194" order="28.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LongTermDebtAbstract" xlink:label="Locator_us-gaap_LongTermDebtAbstract_4195"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_IncreaseInFairValueAdjustment" xlink:label="Locator_exc_IncreaseInFairValueAdjustment_4196"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_LongTermDebtAbstract_4195" xlink:to="Locator_exc_IncreaseInFairValueAdjustment_4196" order="29.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LongTermDebtAbstract" xlink:label="Locator_us-gaap_LongTermDebtAbstract_4197"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueAdjustmentOutstanding" xlink:label="Locator_exc_FairValueAdjustmentOutstanding_4198"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_LongTermDebtAbstract_4197" xlink:to="Locator_exc_FairValueAdjustmentOutstanding_4198" order="30.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DebtInstrumentLineItems" xlink:label="Locator_us-gaap_DebtInstrumentLineItems_4199"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FootnotesToLongTermDebtAbstract" xlink:label="Locator_exc_FootnotesToLongTermDebtAbstract_4200"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DebtInstrumentLineItems_4199" xlink:to="Locator_exc_FootnotesToLongTermDebtAbstract_4200" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FootnotesToLongTermDebtAbstract" xlink:label="Locator_exc_FootnotesToLongTermDebtAbstract_4201"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CapitalLeasesFutureMinimumPaymentsDueCurrent" xlink:label="Locator_us-gaap_CapitalLeasesFutureMinimumPaymentsDueCurrent_4202"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FootnotesToLongTermDebtAbstract_4201" xlink:to="Locator_us-gaap_CapitalLeasesFutureMinimumPaymentsDueCurrent_4202" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FootnotesToLongTermDebtAbstract" xlink:label="Locator_exc_FootnotesToLongTermDebtAbstract_4203"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CapitalLeasesFutureMinimumPaymentsDueInTwoYears" xlink:label="Locator_us-gaap_CapitalLeasesFutureMinimumPaymentsDueInTwoYears_4204"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FootnotesToLongTermDebtAbstract_4203" xlink:to="Locator_us-gaap_CapitalLeasesFutureMinimumPaymentsDueInTwoYears_4204" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FootnotesToLongTermDebtAbstract" xlink:label="Locator_exc_FootnotesToLongTermDebtAbstract_4205"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CapitalLeasesFutureMinimumPaymentsDueInThreeYears" xlink:label="Locator_us-gaap_CapitalLeasesFutureMinimumPaymentsDueInThreeYears_4206"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FootnotesToLongTermDebtAbstract_4205" xlink:to="Locator_us-gaap_CapitalLeasesFutureMinimumPaymentsDueInThreeYears_4206" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FootnotesToLongTermDebtAbstract" xlink:label="Locator_exc_FootnotesToLongTermDebtAbstract_4207"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CapitalLeasesFutureMinimumPaymentsDueInFourYears" xlink:label="Locator_us-gaap_CapitalLeasesFutureMinimumPaymentsDueInFourYears_4208"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FootnotesToLongTermDebtAbstract_4207" xlink:to="Locator_us-gaap_CapitalLeasesFutureMinimumPaymentsDueInFourYears_4208" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FootnotesToLongTermDebtAbstract" xlink:label="Locator_exc_FootnotesToLongTermDebtAbstract_4209"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CapitalLeasesFutureMinimumPaymentsDueInFiveYears" xlink:label="Locator_us-gaap_CapitalLeasesFutureMinimumPaymentsDueInFiveYears_4210"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FootnotesToLongTermDebtAbstract_4209" xlink:to="Locator_us-gaap_CapitalLeasesFutureMinimumPaymentsDueInFiveYears_4210" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FootnotesToLongTermDebtAbstract" xlink:label="Locator_exc_FootnotesToLongTermDebtAbstract_4211"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CapitalLeasesFutureMinimumPaymentsDueThereafter" xlink:label="Locator_us-gaap_CapitalLeasesFutureMinimumPaymentsDueThereafter_4212"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FootnotesToLongTermDebtAbstract_4211" xlink:to="Locator_us-gaap_CapitalLeasesFutureMinimumPaymentsDueThereafter_4212" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FootnotesToLongTermDebtAbstract" xlink:label="Locator_exc_FootnotesToLongTermDebtAbstract_4213"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CapitalLeaseObligationsNoncurrent" xlink:label="Locator_us-gaap_CapitalLeaseObligationsNoncurrent_4214"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FootnotesToLongTermDebtAbstract_4213" xlink:to="Locator_us-gaap_CapitalLeaseObligationsNoncurrent_4214" order="7.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FootnotesToLongTermDebtAbstract" xlink:label="Locator_exc_FootnotesToLongTermDebtAbstract_4215"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NotionalAmountOfInterestRateCashFlowHedgeDerivatives" xlink:label="Locator_us-gaap_NotionalAmountOfInterestRateCashFlowHedgeDerivatives_4216"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FootnotesToLongTermDebtAbstract_4215" xlink:to="Locator_us-gaap_NotionalAmountOfInterestRateCashFlowHedgeDerivatives_4216" order="8.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FootnotesToLongTermDebtAbstract" xlink:label="Locator_exc_FootnotesToLongTermDebtAbstract_4217"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_LossOnInterestRateSwap" xlink:label="Locator_exc_LossOnInterestRateSwap_4218"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FootnotesToLongTermDebtAbstract_4217" xlink:to="Locator_exc_LossOnInterestRateSwap_4218" order="9.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FootnotesToLongTermDebtAbstract" xlink:label="Locator_exc_FootnotesToLongTermDebtAbstract_4219"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DebtInstrumentUnamortizedDiscount" xlink:label="Locator_us-gaap_DebtInstrumentUnamortizedDiscount_4220"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FootnotesToLongTermDebtAbstract_4219" xlink:to="Locator_us-gaap_DebtInstrumentUnamortizedDiscount_4220" order="10.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LineOfCreditFacilityLineItems" xlink:label="Locator_us-gaap_LineOfCreditFacilityLineItems_3847"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LineOfCreditFacilityTable" xlink:label="Locator_us-gaap_LineOfCreditFacilityTable_3848"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="Locator_us-gaap_LineOfCreditFacilityLineItems_3847" xlink:to="Locator_us-gaap_LineOfCreditFacilityTable_3848" order="0.5" xbrldt:contextElement="segment" xbrldt:closed="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LineOfCreditFacilityTable" xlink:label="Locator_us-gaap_LineOfCreditFacilityTable_3995"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_3996"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_us-gaap_LineOfCreditFacilityTable_3995" xlink:to="Locator_dei_LegalEntityAxis_3996" order="0.0"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LineOfCreditFacilityTable" xlink:label="Locator_us-gaap_LineOfCreditFacilityTable_3997"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LineOfCreditFacilityAxis" xlink:label="Locator_us-gaap_LineOfCreditFacilityAxis_3998"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_us-gaap_LineOfCreditFacilityTable_3997" xlink:to="Locator_us-gaap_LineOfCreditFacilityAxis_3998" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LineOfCreditFacilityAxis" xlink:label="Locator_us-gaap_LineOfCreditFacilityAxis_3751"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CreditFacilityTypeDomain" xlink:label="Locator_exc_CreditFacilityTypeDomain_3752"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="Locator_us-gaap_LineOfCreditFacilityAxis_3751" xlink:to="Locator_exc_CreditFacilityTypeDomain_3752" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LineOfCreditFacilityAxis" xlink:label="Locator_us-gaap_LineOfCreditFacilityAxis_4123"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CreditFacilityTypeDomain" xlink:label="Locator_exc_CreditFacilityTypeDomain_4124"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_us-gaap_LineOfCreditFacilityAxis_4123" xlink:to="Locator_exc_CreditFacilityTypeDomain_4124" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CreditFacilityTypeDomain" xlink:label="Locator_exc_CreditFacilityTypeDomain_4125"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SyndicatedRevolverMember" xlink:label="Locator_exc_SyndicatedRevolverMember_4126"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_CreditFacilityTypeDomain_4125" xlink:to="Locator_exc_SyndicatedRevolverMember_4126" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CreditFacilityTypeDomain" xlink:label="Locator_exc_CreditFacilityTypeDomain_4127"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BilateralCreditFacilityMember" xlink:label="Locator_exc_BilateralCreditFacilityMember_4128"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_CreditFacilityTypeDomain_4127" xlink:to="Locator_exc_BilateralCreditFacilityMember_4128" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LineOfCreditFacilityLineItems" xlink:label="Locator_us-gaap_LineOfCreditFacilityLineItems_4221"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LineOfCreditFacilityAbstract" xlink:label="Locator_us-gaap_LineOfCreditFacilityAbstract_4222"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_LineOfCreditFacilityLineItems_4221" xlink:to="Locator_us-gaap_LineOfCreditFacilityAbstract_4222" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LineOfCreditFacilityAbstract" xlink:label="Locator_us-gaap_LineOfCreditFacilityAbstract_4223"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AggregateBankCommitmentsUnderUnsecuredRevolvingCreditFacilities" xlink:label="Locator_exc_AggregateBankCommitmentsUnderUnsecuredRevolvingCreditFacilities_4224"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_LineOfCreditFacilityAbstract_4223" xlink:to="Locator_exc_AggregateBankCommitmentsUnderUnsecuredRevolvingCreditFacilities_4224" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LineOfCreditFacilityAbstract" xlink:label="Locator_us-gaap_LineOfCreditFacilityAbstract_4225"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LineOfCreditFacilityAmountOutstanding" xlink:label="Locator_us-gaap_LineOfCreditFacilityAmountOutstanding_4226"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_LineOfCreditFacilityAbstract_4225" xlink:to="Locator_us-gaap_LineOfCreditFacilityAmountOutstanding_4226" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LineOfCreditFacilityAbstract" xlink:label="Locator_us-gaap_LineOfCreditFacilityAbstract_4227"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_LettersOfCredit" xlink:label="Locator_exc_LettersOfCredit_4228"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_LineOfCreditFacilityAbstract_4227" xlink:to="Locator_exc_LettersOfCredit_4228" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LineOfCreditFacilityAbstract" xlink:label="Locator_us-gaap_LineOfCreditFacilityAbstract_4229"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_UnsecuredRevolvingCreditFacilitiesAvailableCapacity" xlink:label="Locator_exc_UnsecuredRevolvingCreditFacilitiesAvailableCapacity_4230"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_LineOfCreditFacilityAbstract_4229" xlink:to="Locator_exc_UnsecuredRevolvingCreditFacilitiesAvailableCapacity_4230" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LineOfCreditFacilityAbstract" xlink:label="Locator_us-gaap_LineOfCreditFacilityAbstract_4231"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_UnsecuredRevolvingCreditFacilitiesAvailableCapacityToSupportCommercialPaperIssuance" xlink:label="Locator_exc_UnsecuredRevolvingCreditFacilitiesAvailableCapacityToSupportCommercialPaperIssuance_4232"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_LineOfCreditFacilityAbstract_4231" xlink:to="Locator_exc_UnsecuredRevolvingCreditFacilitiesAvailableCapacityToSupportCommercialPaperIssuance_4232" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LineOfCreditFacilityAbstract" xlink:label="Locator_us-gaap_LineOfCreditFacilityAbstract_4233"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AverageInterestRateOnFacilityBorrowings" xlink:label="Locator_exc_AverageInterestRateOnFacilityBorrowings_4234"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_LineOfCreditFacilityAbstract_4233" xlink:to="Locator_exc_AverageInterestRateOnFacilityBorrowings_4234" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LineOfCreditFacilityLineItems" xlink:label="Locator_us-gaap_LineOfCreditFacilityLineItems_4235"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FootnotesToLineOfCreditFacilityAbstract" xlink:label="Locator_exc_FootnotesToLineOfCreditFacilityAbstract_4236"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_LineOfCreditFacilityLineItems_4235" xlink:to="Locator_exc_FootnotesToLineOfCreditFacilityAbstract_4236" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FootnotesToLineOfCreditFacilityAbstract" xlink:label="Locator_exc_FootnotesToLineOfCreditFacilityAbstract_4237"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity" xlink:label="Locator_us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity_4238"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FootnotesToLineOfCreditFacilityAbstract_4237" xlink:to="Locator_us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity_4238" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FootnotesToLineOfCreditFacilityAbstract" xlink:label="Locator_exc_FootnotesToLineOfCreditFacilityAbstract_4239"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_LettersOfCreditOtherFacility" xlink:label="Locator_exc_LettersOfCreditOtherFacility_4240"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FootnotesToLineOfCreditFacilityAbstract_4239" xlink:to="Locator_exc_LettersOfCreditOtherFacility_4240" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ShortTermDebtLineItems" xlink:label="Locator_us-gaap_ShortTermDebtLineItems_3873"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScheduleOfShortTermDebtTable" xlink:label="Locator_us-gaap_ScheduleOfShortTermDebtTable_3874"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="Locator_us-gaap_ShortTermDebtLineItems_3873" xlink:to="Locator_us-gaap_ScheduleOfShortTermDebtTable_3874" order="0.5" xbrldt:contextElement="segment" xbrldt:closed="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScheduleOfShortTermDebtTable" xlink:label="Locator_us-gaap_ScheduleOfShortTermDebtTable_3999"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_4000"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_us-gaap_ScheduleOfShortTermDebtTable_3999" xlink:to="Locator_dei_LegalEntityAxis_4000" order="0.0"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScheduleOfShortTermDebtTable" xlink:label="Locator_us-gaap_ScheduleOfShortTermDebtTable_4001"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ShortTermDebtTypeAxis" xlink:label="Locator_us-gaap_ShortTermDebtTypeAxis_4002"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_us-gaap_ScheduleOfShortTermDebtTable_4001" xlink:to="Locator_us-gaap_ShortTermDebtTypeAxis_4002" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ShortTermDebtTypeAxis" xlink:label="Locator_us-gaap_ShortTermDebtTypeAxis_3753"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ShortTermDebtTypeDomain" xlink:label="Locator_us-gaap_ShortTermDebtTypeDomain_3754"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="Locator_us-gaap_ShortTermDebtTypeAxis_3753" xlink:to="Locator_us-gaap_ShortTermDebtTypeDomain_3754" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ShortTermDebtTypeAxis" xlink:label="Locator_us-gaap_ShortTermDebtTypeAxis_4129"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ShortTermDebtTypeDomain" xlink:label="Locator_us-gaap_ShortTermDebtTypeDomain_4130"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_us-gaap_ShortTermDebtTypeAxis_4129" xlink:to="Locator_us-gaap_ShortTermDebtTypeDomain_4130" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ShortTermDebtTypeDomain" xlink:label="Locator_us-gaap_ShortTermDebtTypeDomain_4131"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CommercialPaperMember" xlink:label="Locator_us-gaap_CommercialPaperMember_4132"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_ShortTermDebtTypeDomain_4131" xlink:to="Locator_us-gaap_CommercialPaperMember_4132" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ShortTermDebtTypeDomain" xlink:label="Locator_us-gaap_ShortTermDebtTypeDomain_4133"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LineOfCreditMember" xlink:label="Locator_us-gaap_LineOfCreditMember_4134"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_ShortTermDebtTypeDomain_4133" xlink:to="Locator_us-gaap_LineOfCreditMember_4134" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ShortTermDebtLineItems" xlink:label="Locator_us-gaap_ShortTermDebtLineItems_4241"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CommercialPaperMaximumProgramSize" xlink:label="Locator_exc_CommercialPaperMaximumProgramSize_4242"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_ShortTermDebtLineItems_4241" xlink:to="Locator_exc_CommercialPaperMaximumProgramSize_4242" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ShortTermDebtLineItems" xlink:label="Locator_us-gaap_ShortTermDebtLineItems_4243"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CommercialPaper" xlink:label="Locator_us-gaap_CommercialPaper_4244"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_ShortTermDebtLineItems_4243" xlink:to="Locator_us-gaap_CommercialPaper_4244" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ShortTermDebtLineItems" xlink:label="Locator_us-gaap_ShortTermDebtLineItems_4245"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AverageInterestRateOnCommercialPaperBorrowings" xlink:label="Locator_exc_AverageInterestRateOnCommercialPaperBorrowings_4246"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_ShortTermDebtLineItems_4245" xlink:to="Locator_exc_AverageInterestRateOnCommercialPaperBorrowings_4246" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ShortTermDebtLineItems" xlink:label="Locator_us-gaap_ShortTermDebtLineItems_4247"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ShorttermDebtOutstandingAmount" xlink:label="Locator_exc_ShorttermDebtOutstandingAmount_4248"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_ShortTermDebtLineItems_4247" xlink:to="Locator_exc_ShorttermDebtOutstandingAmount_4248" order="4.0" xbrldt:usable="true"/> |
| | </definitionLink> |
| <definitionLink xlink:type="extended" xlink:role="http://exeloncorp.com/role/DisclosureSegmentInformationTables"> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SchedulesOfSegmentReportingInformationLineItems" xlink:label="Locator_exc_SchedulesOfSegmentReportingInformationLineItems_4497"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SchedulesOfSegmentReportingInformationTable" xlink:label="Locator_exc_SchedulesOfSegmentReportingInformationTable_4498"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="Locator_exc_SchedulesOfSegmentReportingInformationLineItems_4497" xlink:to="Locator_exc_SchedulesOfSegmentReportingInformationTable_4498" order="0.5" xbrldt:contextElement="segment" xbrldt:closed="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SchedulesOfSegmentReportingInformationTable" xlink:label="Locator_exc_SchedulesOfSegmentReportingInformationTable_4499"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis" xlink:label="Locator_us-gaap_StatementBusinessSegmentsAxis_4500"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_exc_SchedulesOfSegmentReportingInformationTable_4499" xlink:to="Locator_us-gaap_StatementBusinessSegmentsAxis_4500" order="0.0"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis" xlink:label="Locator_us-gaap_StatementBusinessSegmentsAxis_4501"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_SegmentDomain" xlink:label="Locator_us-gaap_SegmentDomain_4502"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_us-gaap_StatementBusinessSegmentsAxis_4501" xlink:to="Locator_us-gaap_SegmentDomain_4502" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_SegmentDomain" xlink:label="Locator_us-gaap_SegmentDomain_4503"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ExelonGenerationCoLLCMember" xlink:label="Locator_exc_ExelonGenerationCoLLCMember_4504"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_SegmentDomain_4503" xlink:to="Locator_exc_ExelonGenerationCoLLCMember_4504" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SchedulesOfSegmentReportingInformationLineItems" xlink:label="Locator_exc_SchedulesOfSegmentReportingInformationLineItems_4505"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTextBlock" xlink:label="Locator_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTextBlock_4506"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_SchedulesOfSegmentReportingInformationLineItems_4505" xlink:to="Locator_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTextBlock_4506" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SchedulesOfSegmentReportingInformationLineItems" xlink:label="Locator_exc_SchedulesOfSegmentReportingInformationLineItems_4507"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ScheduleOfSegmentReportingGenerationRevenuesBySegmentTextBlock" xlink:label="Locator_exc_ScheduleOfSegmentReportingGenerationRevenuesBySegmentTextBlock_4508"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_SchedulesOfSegmentReportingInformationLineItems_4507" xlink:to="Locator_exc_ScheduleOfSegmentReportingGenerationRevenuesBySegmentTextBlock_4508" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SchedulesOfSegmentReportingInformationLineItems" xlink:label="Locator_exc_SchedulesOfSegmentReportingInformationLineItems_4509"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ScheduleOfSegmentReportingGenerationRevenueNetPurchasedFuelBySegmentTextBlock" xlink:label="Locator_exc_ScheduleOfSegmentReportingGenerationRevenueNetPurchasedFuelBySegmentTextBlock_4510"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_SchedulesOfSegmentReportingInformationLineItems_4509" xlink:to="Locator_exc_ScheduleOfSegmentReportingGenerationRevenueNetPurchasedFuelBySegmentTextBlock_4510" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SchedulesOfSegmentReportingInformationLineItems" xlink:label="Locator_exc_SchedulesOfSegmentReportingInformationLineItems_4511"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ReconciliationOfRevenueFromSegmentsToConsolidatedTextBlock" xlink:label="Locator_us-gaap_ReconciliationOfRevenueFromSegmentsToConsolidatedTextBlock_4512"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_SchedulesOfSegmentReportingInformationLineItems_4511" xlink:to="Locator_us-gaap_ReconciliationOfRevenueFromSegmentsToConsolidatedTextBlock_4512" order="4.0" xbrldt:usable="true"/> |
| | </definitionLink> |
| <definitionLink xlink:type="extended" xlink:role="http://exeloncorp.com/role/DisclosureSegmentInformationDetails"> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ExelonGenerationCoLLCMember" xlink:label="Locator_exc_ExelonGenerationCoLLCMember_4571"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_GenerationMidAtlanticMember" xlink:label="Locator_exc_GenerationMidAtlanticMember_4572"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_ExelonGenerationCoLLCMember_4571" xlink:to="Locator_exc_GenerationMidAtlanticMember_4572" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ExelonGenerationCoLLCMember" xlink:label="Locator_exc_ExelonGenerationCoLLCMember_4573"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_GenerationMidwestMember" xlink:label="Locator_exc_GenerationMidwestMember_4574"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_ExelonGenerationCoLLCMember_4573" xlink:to="Locator_exc_GenerationMidwestMember_4574" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ExelonGenerationCoLLCMember" xlink:label="Locator_exc_ExelonGenerationCoLLCMember_4575"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_GenerationNewEnglandMember" xlink:label="Locator_exc_GenerationNewEnglandMember_4576"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_ExelonGenerationCoLLCMember_4575" xlink:to="Locator_exc_GenerationNewEnglandMember_4576" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ExelonGenerationCoLLCMember" xlink:label="Locator_exc_ExelonGenerationCoLLCMember_4577"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_GenerationNewYorkMember" xlink:label="Locator_exc_GenerationNewYorkMember_4578"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_ExelonGenerationCoLLCMember_4577" xlink:to="Locator_exc_GenerationNewYorkMember_4578" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ExelonGenerationCoLLCMember" xlink:label="Locator_exc_ExelonGenerationCoLLCMember_4579"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_GenerationErcotMember" xlink:label="Locator_exc_GenerationErcotMember_4580"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_ExelonGenerationCoLLCMember_4579" xlink:to="Locator_exc_GenerationErcotMember_4580" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ExelonGenerationCoLLCMember" xlink:label="Locator_exc_ExelonGenerationCoLLCMember_4581"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_GenerationOtherRegionsMember" xlink:label="Locator_exc_GenerationOtherRegionsMember_4582"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_ExelonGenerationCoLLCMember_4581" xlink:to="Locator_exc_GenerationOtherRegionsMember_4582" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ExelonGenerationCoLLCMember" xlink:label="Locator_exc_ExelonGenerationCoLLCMember_4583"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_GenerationReportableSegmentsTotalMember" xlink:label="Locator_exc_GenerationReportableSegmentsTotalMember_4584"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_ExelonGenerationCoLLCMember_4583" xlink:to="Locator_exc_GenerationReportableSegmentsTotalMember_4584" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ExelonGenerationCoLLCMember" xlink:label="Locator_exc_ExelonGenerationCoLLCMember_4585"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_GenerationTotalConsolidatedGroupMember" xlink:label="Locator_exc_GenerationTotalConsolidatedGroupMember_4586"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_ExelonGenerationCoLLCMember_4585" xlink:to="Locator_exc_GenerationTotalConsolidatedGroupMember_4586" order="7.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SegmentConsolidatingItemsAxis" xlink:label="Locator_exc_SegmentConsolidatingItemsAxis_4523"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SegmentConsolidatingItemsDomain" xlink:label="Locator_exc_SegmentConsolidatingItemsDomain_4524"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="Locator_exc_SegmentConsolidatingItemsAxis_4523" xlink:to="Locator_exc_SegmentConsolidatingItemsDomain_4524" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SegmentConsolidatingItemsAxis" xlink:label="Locator_exc_SegmentConsolidatingItemsAxis_4605"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SegmentConsolidatingItemsDomain" xlink:label="Locator_exc_SegmentConsolidatingItemsDomain_4606"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_exc_SegmentConsolidatingItemsAxis_4605" xlink:to="Locator_exc_SegmentConsolidatingItemsDomain_4606" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SegmentConsolidatingItemsDomain" xlink:label="Locator_exc_SegmentConsolidatingItemsDomain_4607"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AllOtherSegmentsMember" xlink:label="Locator_us-gaap_AllOtherSegmentsMember_4608"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_SegmentConsolidatingItemsDomain_4607" xlink:to="Locator_us-gaap_AllOtherSegmentsMember_4608" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SegmentConsolidatingItemsDomain" xlink:label="Locator_exc_SegmentConsolidatingItemsDomain_4611"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ReportableSegmentsMember" xlink:label="Locator_us-gaap_ReportableSegmentsMember_4612"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_SegmentConsolidatingItemsDomain_4611" xlink:to="Locator_us-gaap_ReportableSegmentsMember_4612" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SegmentConsolidatingItemsDomain" xlink:label="Locator_exc_SegmentConsolidatingItemsDomain_4609"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessIntersegmentEliminationsMember" xlink:label="Locator_us-gaap_BusinessIntersegmentEliminationsMember_4610"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_SegmentConsolidatingItemsDomain_4609" xlink:to="Locator_us-gaap_BusinessIntersegmentEliminationsMember_4610" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:label="Locator_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_4587"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RelatedPartyDomain" xlink:label="Locator_us-gaap_RelatedPartyDomain_4588"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_4587" xlink:to="Locator_us-gaap_RelatedPartyDomain_4588" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RelatedPartyDomain" xlink:label="Locator_us-gaap_RelatedPartyDomain_4591"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CommonwealthEdisonCoAffiliateMember" xlink:label="Locator_exc_CommonwealthEdisonCoAffiliateMember_4592"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RelatedPartyDomain_4591" xlink:to="Locator_exc_CommonwealthEdisonCoAffiliateMember_4592" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RelatedPartyDomain" xlink:label="Locator_us-gaap_RelatedPartyDomain_4593"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PecoEnergyCoAffiliateMember" xlink:label="Locator_exc_PecoEnergyCoAffiliateMember_4594"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RelatedPartyDomain_4593" xlink:to="Locator_exc_PecoEnergyCoAffiliateMember_4594" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RelatedPartyDomain" xlink:label="Locator_us-gaap_RelatedPartyDomain_4589"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BaltimoreGasAndElectricCompanyAffiliateMember" xlink:label="Locator_exc_BaltimoreGasAndElectricCompanyAffiliateMember_4590"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RelatedPartyDomain_4589" xlink:to="Locator_exc_BaltimoreGasAndElectricCompanyAffiliateMember_4590" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis" xlink:label="Locator_us-gaap_StatementBusinessSegmentsAxis_4521"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_SegmentDomain" xlink:label="Locator_us-gaap_SegmentDomain_4522"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="Locator_us-gaap_StatementBusinessSegmentsAxis_4521" xlink:to="Locator_us-gaap_SegmentDomain_4522" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis" xlink:label="Locator_us-gaap_StatementBusinessSegmentsAxis_4595"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_SegmentDomain" xlink:label="Locator_us-gaap_SegmentDomain_4596"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_us-gaap_StatementBusinessSegmentsAxis_4595" xlink:to="Locator_us-gaap_SegmentDomain_4596" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_SegmentDomain" xlink:label="Locator_us-gaap_SegmentDomain_4597"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ExelonGenerationCoLLCMember" xlink:label="Locator_exc_ExelonGenerationCoLLCMember_4598"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_SegmentDomain_4597" xlink:to="Locator_exc_ExelonGenerationCoLLCMember_4598" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_SegmentDomain" xlink:label="Locator_us-gaap_SegmentDomain_4599"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CommonwealthEdisonCoMember" xlink:label="Locator_exc_CommonwealthEdisonCoMember_4600"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_SegmentDomain_4599" xlink:to="Locator_exc_CommonwealthEdisonCoMember_4600" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_SegmentDomain" xlink:label="Locator_us-gaap_SegmentDomain_4601"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PecoEnergyCoMember" xlink:label="Locator_exc_PecoEnergyCoMember_4602"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_SegmentDomain_4601" xlink:to="Locator_exc_PecoEnergyCoMember_4602" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_SegmentDomain" xlink:label="Locator_us-gaap_SegmentDomain_4603"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BaltimoreGasAndElectricCompanyMember" xlink:label="Locator_exc_BaltimoreGasAndElectricCompanyMember_4604"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_SegmentDomain_4603" xlink:to="Locator_exc_BaltimoreGasAndElectricCompanyMember_4604" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_SegmentReportingInformationLineItems" xlink:label="Locator_us-gaap_SegmentReportingInformationLineItems_4555"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable" xlink:label="Locator_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_4556"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="Locator_us-gaap_SegmentReportingInformationLineItems_4555" xlink:to="Locator_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_4556" order="0.5" xbrldt:contextElement="segment" xbrldt:closed="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable" xlink:label="Locator_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_4565"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis" xlink:label="Locator_us-gaap_StatementBusinessSegmentsAxis_4566"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_4565" xlink:to="Locator_us-gaap_StatementBusinessSegmentsAxis_4566" order="0.0"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable" xlink:label="Locator_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_4567"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SegmentConsolidatingItemsAxis" xlink:label="Locator_exc_SegmentConsolidatingItemsAxis_4568"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_4567" xlink:to="Locator_exc_SegmentConsolidatingItemsAxis_4568" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable" xlink:label="Locator_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_4569"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:label="Locator_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_4570"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_4569" xlink:to="Locator_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_4570" order="2.0"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_SegmentReportingInformationLineItems" xlink:label="Locator_us-gaap_SegmentReportingInformationLineItems_4613"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RevenuesFromExternalCustomers" xlink:label="Locator_us-gaap_RevenuesFromExternalCustomers_4614"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_SegmentReportingInformationLineItems_4613" xlink:to="Locator_us-gaap_RevenuesFromExternalCustomers_4614" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_SegmentReportingInformationLineItems" xlink:label="Locator_us-gaap_SegmentReportingInformationLineItems_4615"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RevenuesFromTransactionsWithOtherOperatingSegmentsOfSameEntity" xlink:label="Locator_us-gaap_RevenuesFromTransactionsWithOtherOperatingSegmentsOfSameEntity_4616"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_SegmentReportingInformationLineItems_4615" xlink:to="Locator_us-gaap_RevenuesFromTransactionsWithOtherOperatingSegmentsOfSameEntity_4616" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_SegmentReportingInformationLineItems" xlink:label="Locator_us-gaap_SegmentReportingInformationLineItems_4617"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_Revenues" xlink:label="Locator_us-gaap_Revenues_4618"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_SegmentReportingInformationLineItems_4617" xlink:to="Locator_us-gaap_Revenues_4618" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_SegmentReportingInformationLineItems" xlink:label="Locator_us-gaap_SegmentReportingInformationLineItems_4619"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest" xlink:label="Locator_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_4620"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_SegmentReportingInformationLineItems_4619" xlink:to="Locator_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_4620" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_SegmentReportingInformationLineItems" xlink:label="Locator_us-gaap_SegmentReportingInformationLineItems_4621"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SegmentReportingInformationRevenueNetOfPurchasePowerAndFuelFromExternalCustomers" xlink:label="Locator_exc_SegmentReportingInformationRevenueNetOfPurchasePowerAndFuelFromExternalCustomers_4622"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_SegmentReportingInformationLineItems_4621" xlink:to="Locator_exc_SegmentReportingInformationRevenueNetOfPurchasePowerAndFuelFromExternalCustomers_4622" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_SegmentReportingInformationLineItems" xlink:label="Locator_us-gaap_SegmentReportingInformationLineItems_4623"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SegmentReportingInformationIntersegmentRevenueNetOfPurchasePowerAndFuel" xlink:label="Locator_exc_SegmentReportingInformationIntersegmentRevenueNetOfPurchasePowerAndFuel_4624"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_SegmentReportingInformationLineItems_4623" xlink:to="Locator_exc_SegmentReportingInformationIntersegmentRevenueNetOfPurchasePowerAndFuel_4624" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_SegmentReportingInformationLineItems" xlink:label="Locator_us-gaap_SegmentReportingInformationLineItems_4625"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SegmentReportingInformationRevenueNetOfPurchasePowerAndFuel" xlink:label="Locator_exc_SegmentReportingInformationRevenueNetOfPurchasePowerAndFuel_4626"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_SegmentReportingInformationLineItems_4625" xlink:to="Locator_exc_SegmentReportingInformationRevenueNetOfPurchasePowerAndFuel_4626" order="7.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_SegmentReportingInformationLineItems" xlink:label="Locator_us-gaap_SegmentReportingInformationLineItems_4627"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DepreciationDepletionAndAmortization" xlink:label="Locator_us-gaap_DepreciationDepletionAndAmortization_4628"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_SegmentReportingInformationLineItems_4627" xlink:to="Locator_us-gaap_DepreciationDepletionAndAmortization_4628" order="8.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_SegmentReportingInformationLineItems" xlink:label="Locator_us-gaap_SegmentReportingInformationLineItems_4629"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OperatingExpenses" xlink:label="Locator_us-gaap_OperatingExpenses_4630"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_SegmentReportingInformationLineItems_4629" xlink:to="Locator_us-gaap_OperatingExpenses_4630" order="9.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_SegmentReportingInformationLineItems" xlink:label="Locator_us-gaap_SegmentReportingInformationLineItems_4631"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_TotalInterestExpense" xlink:label="Locator_exc_TotalInterestExpense_4632"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_SegmentReportingInformationLineItems_4631" xlink:to="Locator_exc_TotalInterestExpense_4632" order="10.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_SegmentReportingInformationLineItems" xlink:label="Locator_us-gaap_SegmentReportingInformationLineItems_4633"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="Locator_us-gaap_IncomeTaxExpenseBenefit_4634"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_SegmentReportingInformationLineItems_4633" xlink:to="Locator_us-gaap_IncomeTaxExpenseBenefit_4634" order="11.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_SegmentReportingInformationLineItems" xlink:label="Locator_us-gaap_SegmentReportingInformationLineItems_4635"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ProfitLoss" xlink:label="Locator_us-gaap_ProfitLoss_4636"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_SegmentReportingInformationLineItems_4635" xlink:to="Locator_us-gaap_ProfitLoss_4636" order="12.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_SegmentReportingInformationLineItems" xlink:label="Locator_us-gaap_SegmentReportingInformationLineItems_4637"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AdditionsToNoncurrentAssets" xlink:label="Locator_us-gaap_AdditionsToNoncurrentAssets_4638"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_SegmentReportingInformationLineItems_4637" xlink:to="Locator_us-gaap_AdditionsToNoncurrentAssets_4638" order="13.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_SegmentReportingInformationLineItems" xlink:label="Locator_us-gaap_SegmentReportingInformationLineItems_4639"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_Assets" xlink:label="Locator_us-gaap_Assets_4640"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_SegmentReportingInformationLineItems_4639" xlink:to="Locator_us-gaap_Assets_4640" order="14.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_SegmentReportingInformationLineItems" xlink:label="Locator_us-gaap_SegmentReportingInformationLineItems_4641"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_SegmentReportingInformationAdditionalInformationAbstract" xlink:label="Locator_us-gaap_SegmentReportingInformationAdditionalInformationAbstract_4642"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_SegmentReportingInformationLineItems_4641" xlink:to="Locator_us-gaap_SegmentReportingInformationAdditionalInformationAbstract_4642" order="15.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_SegmentReportingInformationAdditionalInformationAbstract" xlink:label="Locator_us-gaap_SegmentReportingInformationAdditionalInformationAbstract_4643"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NumberOfReportableSegments" xlink:label="Locator_exc_NumberOfReportableSegments_4644"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_SegmentReportingInformationAdditionalInformationAbstract_4643" xlink:to="Locator_exc_NumberOfReportableSegments_4644" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_SegmentReportingInformationAdditionalInformationAbstract" xlink:label="Locator_us-gaap_SegmentReportingInformationAdditionalInformationAbstract_4645"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_UtilityTaxes" xlink:label="Locator_exc_UtilityTaxes_4646"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_SegmentReportingInformationAdditionalInformationAbstract_4645" xlink:to="Locator_exc_UtilityTaxes_4646" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_SegmentReportingInformationAdditionalInformationAbstract" xlink:label="Locator_us-gaap_SegmentReportingInformationAdditionalInformationAbstract_4647"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_UnrealizedGainLossOnDerivatives" xlink:label="Locator_us-gaap_UnrealizedGainLossOnDerivatives_4648"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_SegmentReportingInformationAdditionalInformationAbstract_4647" xlink:to="Locator_us-gaap_UnrealizedGainLossOnDerivatives_4648" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_SegmentReportingInformationAdditionalInformationAbstract" xlink:label="Locator_us-gaap_SegmentReportingInformationAdditionalInformationAbstract_4649"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherAssetImpairmentCharges" xlink:label="Locator_us-gaap_OtherAssetImpairmentCharges_4650"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_SegmentReportingInformationAdditionalInformationAbstract_4649" xlink:to="Locator_us-gaap_OtherAssetImpairmentCharges_4650" order="4.0" xbrldt:usable="true"/> |
| | </definitionLink> |
| <definitionLink xlink:type="extended" xlink:role="http://exeloncorp.com/role/DisclosureDerivativeFinancialInstrumentsFairValueMeasurmentsDetails"> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_4953"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_4954"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_dei_LegalEntityAxis_4953" xlink:to="Locator_dei_EntityDomain_4954" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_4955"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ExelonGenerationCoLLCMember" xlink:label="Locator_exc_ExelonGenerationCoLLCMember_4956"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_4955" xlink:to="Locator_exc_ExelonGenerationCoLLCMember_4956" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_4957"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CommonwealthEdisonCoMember" xlink:label="Locator_exc_CommonwealthEdisonCoMember_4958"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_4957" xlink:to="Locator_exc_CommonwealthEdisonCoMember_4958" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_4959"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PecoEnergyCoMember" xlink:label="Locator_exc_PecoEnergyCoMember_4960"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_4959" xlink:to="Locator_exc_PecoEnergyCoMember_4960" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_4961"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BaltimoreGasAndElectricCompanyMember" xlink:label="Locator_exc_BaltimoreGasAndElectricCompanyMember_4962"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_4961" xlink:to="Locator_exc_BaltimoreGasAndElectricCompanyMember_4962" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_4963"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OtherSegmentMember" xlink:label="Locator_exc_OtherSegmentMember_4964"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_4963" xlink:to="Locator_exc_OtherSegmentMember_4964" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementScenarioAxis" xlink:label="Locator_us-gaap_StatementScenarioAxis_4923"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScenarioUnspecifiedDomain" xlink:label="Locator_us-gaap_ScenarioUnspecifiedDomain_4924"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_us-gaap_StatementScenarioAxis_4923" xlink:to="Locator_us-gaap_ScenarioUnspecifiedDomain_4924" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScenarioUnspecifiedDomain" xlink:label="Locator_us-gaap_ScenarioUnspecifiedDomain_4925"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ProFormaMember" xlink:label="Locator_exc_ProFormaMember_4926"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_ScenarioUnspecifiedDomain_4925" xlink:to="Locator_exc_ProFormaMember_4926" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CashFlowHedgesGainLossLineItems" xlink:label="Locator_exc_CashFlowHedgesGainLossLineItems_4785"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CashFlowHedgesGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable" xlink:label="Locator_exc_CashFlowHedgesGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_4786"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="Locator_exc_CashFlowHedgesGainLossLineItems_4785" xlink:to="Locator_exc_CashFlowHedgesGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_4786" order="0.5" xbrldt:contextElement="segment" xbrldt:closed="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CashFlowHedgesGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable" xlink:label="Locator_exc_CashFlowHedgesGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_4891"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_4892"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_exc_CashFlowHedgesGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_4891" xlink:to="Locator_dei_LegalEntityAxis_4892" order="0.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CashFlowHedgesGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable" xlink:label="Locator_exc_CashFlowHedgesGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_4893"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CashFlowHedgeByDerivativeInstrumentAxis" xlink:label="Locator_exc_CashFlowHedgeByDerivativeInstrumentAxis_4894"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_exc_CashFlowHedgesGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_4893" xlink:to="Locator_exc_CashFlowHedgeByDerivativeInstrumentAxis_4894" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CashFlowHedgeByDerivativeInstrumentAxis" xlink:label="Locator_exc_CashFlowHedgeByDerivativeInstrumentAxis_4715"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CashFlowContractTypeDomain" xlink:label="Locator_exc_CashFlowContractTypeDomain_4716"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="Locator_exc_CashFlowHedgeByDerivativeInstrumentAxis_4715" xlink:to="Locator_exc_CashFlowContractTypeDomain_4716" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CashFlowHedgeByDerivativeInstrumentAxis" xlink:label="Locator_exc_CashFlowHedgeByDerivativeInstrumentAxis_4927"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CashFlowContractTypeDomain" xlink:label="Locator_exc_CashFlowContractTypeDomain_4928"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_exc_CashFlowHedgeByDerivativeInstrumentAxis_4927" xlink:to="Locator_exc_CashFlowContractTypeDomain_4928" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CashFlowContractTypeDomain" xlink:label="Locator_exc_CashFlowContractTypeDomain_4929"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EnergyRelatedHedgesMember" xlink:label="Locator_exc_EnergyRelatedHedgesMember_4930"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_CashFlowContractTypeDomain_4929" xlink:to="Locator_exc_EnergyRelatedHedgesMember_4930" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CashFlowContractTypeDomain" xlink:label="Locator_exc_CashFlowContractTypeDomain_4931"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_TotalCashFlowHedgesMember" xlink:label="Locator_exc_TotalCashFlowHedgesMember_4932"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_CashFlowContractTypeDomain_4931" xlink:to="Locator_exc_TotalCashFlowHedgesMember_4932" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CashFlowHedgesGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable" xlink:label="Locator_exc_CashFlowHedgesGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_4895"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CashFlowHedgesGainLossByIncomeStatementLocationAxis" xlink:label="Locator_exc_CashFlowHedgesGainLossByIncomeStatementLocationAxis_4896"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_exc_CashFlowHedgesGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_4895" xlink:to="Locator_exc_CashFlowHedgesGainLossByIncomeStatementLocationAxis_4896" order="2.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CashFlowHedgesGainLossByIncomeStatementLocationAxis" xlink:label="Locator_exc_CashFlowHedgesGainLossByIncomeStatementLocationAxis_4717"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CashFlowHedgesIncomeLocationDomain" xlink:label="Locator_exc_CashFlowHedgesIncomeLocationDomain_4718"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="Locator_exc_CashFlowHedgesGainLossByIncomeStatementLocationAxis_4717" xlink:to="Locator_exc_CashFlowHedgesIncomeLocationDomain_4718" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CashFlowHedgesGainLossByIncomeStatementLocationAxis" xlink:label="Locator_exc_CashFlowHedgesGainLossByIncomeStatementLocationAxis_4933"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CashFlowHedgesIncomeLocationDomain" xlink:label="Locator_exc_CashFlowHedgesIncomeLocationDomain_4934"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_exc_CashFlowHedgesGainLossByIncomeStatementLocationAxis_4933" xlink:to="Locator_exc_CashFlowHedgesIncomeLocationDomain_4934" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CashFlowHedgesIncomeLocationDomain" xlink:label="Locator_exc_CashFlowHedgesIncomeLocationDomain_4935"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OperatingRevenueMember" xlink:label="Locator_exc_OperatingRevenueMember_4936"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_CashFlowHedgesIncomeLocationDomain_4935" xlink:to="Locator_exc_OperatingRevenueMember_4936" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CashFlowHedgesIncomeLocationDomain" xlink:label="Locator_exc_CashFlowHedgesIncomeLocationDomain_4937"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PurchasedPowerMember" xlink:label="Locator_exc_PurchasedPowerMember_4938"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_CashFlowHedgesIncomeLocationDomain_4937" xlink:to="Locator_exc_PurchasedPowerMember_4938" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CashFlowHedgesIncomeLocationDomain" xlink:label="Locator_exc_CashFlowHedgesIncomeLocationDomain_4939"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PurchasedPowerAndFuelMember" xlink:label="Locator_exc_PurchasedPowerAndFuelMember_4940"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_CashFlowHedgesIncomeLocationDomain_4939" xlink:to="Locator_exc_PurchasedPowerAndFuelMember_4940" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CashFlowHedgesIncomeLocationDomain" xlink:label="Locator_exc_CashFlowHedgesIncomeLocationDomain_4941"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FuelInventoryMember" xlink:label="Locator_exc_FuelInventoryMember_4942"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_CashFlowHedgesIncomeLocationDomain_4941" xlink:to="Locator_exc_FuelInventoryMember_4942" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CashFlowHedgesGainLossLineItems" xlink:label="Locator_exc_CashFlowHedgesGainLossLineItems_5019"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CashFlowHedgeAccumulatedOtherComprehensiveIncomeAbstract" xlink:label="Locator_exc_CashFlowHedgeAccumulatedOtherComprehensiveIncomeAbstract_5020"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_CashFlowHedgesGainLossLineItems_5019" xlink:to="Locator_exc_CashFlowHedgeAccumulatedOtherComprehensiveIncomeAbstract_5020" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CashFlowHedgeAccumulatedOtherComprehensiveIncomeAbstract" xlink:label="Locator_exc_CashFlowHedgeAccumulatedOtherComprehensiveIncomeAbstract_5021"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CashFlowHedgeAccumulatedOtherComprehensiveIncomeGainLoss" xlink:label="Locator_exc_CashFlowHedgeAccumulatedOtherComprehensiveIncomeGainLoss_5022"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_CashFlowHedgeAccumulatedOtherComprehensiveIncomeAbstract_5021" xlink:to="Locator_exc_CashFlowHedgeAccumulatedOtherComprehensiveIncomeGainLoss_5022" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CashFlowHedgeAccumulatedOtherComprehensiveIncomeAbstract" xlink:label="Locator_exc_CashFlowHedgeAccumulatedOtherComprehensiveIncomeAbstract_5023"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EffectivePortionOfChangesInFairValue" xlink:label="Locator_exc_EffectivePortionOfChangesInFairValue_5024"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_CashFlowHedgeAccumulatedOtherComprehensiveIncomeAbstract_5023" xlink:to="Locator_exc_EffectivePortionOfChangesInFairValue_5024" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CashFlowHedgeAccumulatedOtherComprehensiveIncomeAbstract" xlink:label="Locator_exc_CashFlowHedgeAccumulatedOtherComprehensiveIncomeAbstract_5025"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CashFlowHedgeGainLossReclassifiedToEarningsNet" xlink:label="Locator_us-gaap_CashFlowHedgeGainLossReclassifiedToEarningsNet_5026"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_CashFlowHedgeAccumulatedOtherComprehensiveIncomeAbstract_5025" xlink:to="Locator_us-gaap_CashFlowHedgeGainLossReclassifiedToEarningsNet_5026" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CashFlowHedgeAccumulatedOtherComprehensiveIncomeAbstract" xlink:label="Locator_exc_CashFlowHedgeAccumulatedOtherComprehensiveIncomeAbstract_5027"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_GainLossOnCashFlowHedgeIneffectivenessNet" xlink:label="Locator_us-gaap_GainLossOnCashFlowHedgeIneffectivenessNet_5028"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_CashFlowHedgeAccumulatedOtherComprehensiveIncomeAbstract_5027" xlink:to="Locator_us-gaap_GainLossOnCashFlowHedgeIneffectivenessNet_5028" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CashFlowHedgesGainLossLineItems" xlink:label="Locator_exc_CashFlowHedgesGainLossLineItems_5029"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FootnotesToCashFlowHedgeAccumulatedOtherComprehensiveIncomeAbstract" xlink:label="Locator_exc_FootnotesToCashFlowHedgeAccumulatedOtherComprehensiveIncomeAbstract_5030"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_CashFlowHedgesGainLossLineItems_5029" xlink:to="Locator_exc_FootnotesToCashFlowHedgeAccumulatedOtherComprehensiveIncomeAbstract_5030" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FootnotesToCashFlowHedgeAccumulatedOtherComprehensiveIncomeAbstract" xlink:label="Locator_exc_FootnotesToCashFlowHedgeAccumulatedOtherComprehensiveIncomeAbstract_5031"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueSwapContractGainLossOnCashFlowHedgesNetOfTax" xlink:label="Locator_exc_FairValueSwapContractGainLossOnCashFlowHedgesNetOfTax_5032"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FootnotesToCashFlowHedgeAccumulatedOtherComprehensiveIncomeAbstract_5031" xlink:to="Locator_exc_FairValueSwapContractGainLossOnCashFlowHedgesNetOfTax_5032" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FootnotesToCashFlowHedgeAccumulatedOtherComprehensiveIncomeAbstract" xlink:label="Locator_exc_FootnotesToCashFlowHedgeAccumulatedOtherComprehensiveIncomeAbstract_5033"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueBlockContractGainLossOnCashFlowHedgesNetOfTax" xlink:label="Locator_exc_FairValueBlockContractGainLossOnCashFlowHedgesNetOfTax_5034"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FootnotesToCashFlowHedgeAccumulatedOtherComprehensiveIncomeAbstract_5033" xlink:to="Locator_exc_FairValueBlockContractGainLossOnCashFlowHedgesNetOfTax_5034" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FootnotesToCashFlowHedgeAccumulatedOtherComprehensiveIncomeAbstract" xlink:label="Locator_exc_FootnotesToCashFlowHedgeAccumulatedOtherComprehensiveIncomeAbstract_5035"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EffectivePortionOfChangeInFairValueOfSwapContractNetOfTax" xlink:label="Locator_exc_EffectivePortionOfChangeInFairValueOfSwapContractNetOfTax_5036"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FootnotesToCashFlowHedgeAccumulatedOtherComprehensiveIncomeAbstract_5035" xlink:to="Locator_exc_EffectivePortionOfChangeInFairValueOfSwapContractNetOfTax_5036" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FootnotesToCashFlowHedgeAccumulatedOtherComprehensiveIncomeAbstract" xlink:label="Locator_exc_FootnotesToCashFlowHedgeAccumulatedOtherComprehensiveIncomeAbstract_5037"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EffectivePortionOfChangeInFairValueOfBlockContractNetOfTax" xlink:label="Locator_exc_EffectivePortionOfChangeInFairValueOfBlockContractNetOfTax_5038"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FootnotesToCashFlowHedgeAccumulatedOtherComprehensiveIncomeAbstract_5037" xlink:to="Locator_exc_EffectivePortionOfChangeInFairValueOfBlockContractNetOfTax_5038" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FootnotesToCashFlowHedgeAccumulatedOtherComprehensiveIncomeAbstract" xlink:label="Locator_exc_FootnotesToCashFlowHedgeAccumulatedOtherComprehensiveIncomeAbstract_5039"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueSwapContractCashFlowHedgeGainLossReclassifiedToEarningsNetOfTax" xlink:label="Locator_exc_FairValueSwapContractCashFlowHedgeGainLossReclassifiedToEarningsNetOfTax_5040"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FootnotesToCashFlowHedgeAccumulatedOtherComprehensiveIncomeAbstract_5039" xlink:to="Locator_exc_FairValueSwapContractCashFlowHedgeGainLossReclassifiedToEarningsNetOfTax_5040" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FootnotesToCashFlowHedgeAccumulatedOtherComprehensiveIncomeAbstract" xlink:label="Locator_exc_FootnotesToCashFlowHedgeAccumulatedOtherComprehensiveIncomeAbstract_5041"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueBlockContractCashFlowHedgeGainLossReclassifiedToEarningsNetOfTax" xlink:label="Locator_exc_FairValueBlockContractCashFlowHedgeGainLossReclassifiedToEarningsNetOfTax_5042"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FootnotesToCashFlowHedgeAccumulatedOtherComprehensiveIncomeAbstract_5041" xlink:to="Locator_exc_FairValueBlockContractCashFlowHedgeGainLossReclassifiedToEarningsNetOfTax_5042" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FootnotesToCashFlowHedgeAccumulatedOtherComprehensiveIncomeAbstract" xlink:label="Locator_exc_FootnotesToCashFlowHedgeAccumulatedOtherComprehensiveIncomeAbstract_5043"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_GainLossOnInterestRateSwapTreasuryRateLockNetOfTax" xlink:label="Locator_exc_GainLossOnInterestRateSwapTreasuryRateLockNetOfTax_5044"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FootnotesToCashFlowHedgeAccumulatedOtherComprehensiveIncomeAbstract_5043" xlink:to="Locator_exc_GainLossOnInterestRateSwapTreasuryRateLockNetOfTax_5044" order="7.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FootnotesToCashFlowHedgeAccumulatedOtherComprehensiveIncomeAbstract" xlink:label="Locator_exc_FootnotesToCashFlowHedgeAccumulatedOtherComprehensiveIncomeAbstract_5045"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_GainLossOnInterestRateSwapNetOfTax" xlink:label="Locator_exc_GainLossOnInterestRateSwapNetOfTax_5046"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FootnotesToCashFlowHedgeAccumulatedOtherComprehensiveIncomeAbstract_5045" xlink:to="Locator_exc_GainLossOnInterestRateSwapNetOfTax_5046" order="8.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FootnotesToCashFlowHedgeAccumulatedOtherComprehensiveIncomeAbstract" xlink:label="Locator_exc_FootnotesToCashFlowHedgeAccumulatedOtherComprehensiveIncomeAbstract_5047"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EffectivePortionOfChangeInFairValueOfTreasuryRateLockNetOfTax" xlink:label="Locator_exc_EffectivePortionOfChangeInFairValueOfTreasuryRateLockNetOfTax_5048"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FootnotesToCashFlowHedgeAccumulatedOtherComprehensiveIncomeAbstract_5047" xlink:to="Locator_exc_EffectivePortionOfChangeInFairValueOfTreasuryRateLockNetOfTax_5048" order="9.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FootnotesToCashFlowHedgeAccumulatedOtherComprehensiveIncomeAbstract" xlink:label="Locator_exc_FootnotesToCashFlowHedgeAccumulatedOtherComprehensiveIncomeAbstract_5049"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherComprehensiveIncomeReclassificationAdjustmentOnDerivativesIncludedInNetIncomeNetOfTax" xlink:label="Locator_us-gaap_OtherComprehensiveIncomeReclassificationAdjustmentOnDerivativesIncludedInNetIncomeNetOfTax_5050"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FootnotesToCashFlowHedgeAccumulatedOtherComprehensiveIncomeAbstract_5049" xlink:to="Locator_us-gaap_OtherComprehensiveIncomeReclassificationAdjustmentOnDerivativesIncludedInNetIncomeNetOfTax_5050" order="10.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FootnotesToCashFlowHedgeAccumulatedOtherComprehensiveIncomeAbstract" xlink:label="Locator_exc_FootnotesToCashFlowHedgeAccumulatedOtherComprehensiveIncomeAbstract_5051"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueTreasuryRateLockCashFlowHedgeGainLossReclassifiedToRegulatoryAssetsNetOfTax" xlink:label="Locator_exc_FairValueTreasuryRateLockCashFlowHedgeGainLossReclassifiedToRegulatoryAssetsNetOfTax_5052"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FootnotesToCashFlowHedgeAccumulatedOtherComprehensiveIncomeAbstract_5051" xlink:to="Locator_exc_FairValueTreasuryRateLockCashFlowHedgeGainLossReclassifiedToRegulatoryAssetsNetOfTax_5052" order="11.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FootnotesToCashFlowHedgeAccumulatedOtherComprehensiveIncomeAbstract" xlink:label="Locator_exc_FootnotesToCashFlowHedgeAccumulatedOtherComprehensiveIncomeAbstract_5053"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueTreasuryRateLockCashFlowHedgeIncomeTaxReclassifiedToDeferredIncomeTaxLiability" xlink:label="Locator_exc_FairValueTreasuryRateLockCashFlowHedgeIncomeTaxReclassifiedToDeferredIncomeTaxLiability_5054"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FootnotesToCashFlowHedgeAccumulatedOtherComprehensiveIncomeAbstract_5053" xlink:to="Locator_exc_FairValueTreasuryRateLockCashFlowHedgeIncomeTaxReclassifiedToDeferredIncomeTaxLiability_5054" order="12.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FootnotesToCashFlowHedgeAccumulatedOtherComprehensiveIncomeAbstract" xlink:label="Locator_exc_FootnotesToCashFlowHedgeAccumulatedOtherComprehensiveIncomeAbstract_5055"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CashFlowHedgeIneffectivenessDedesignation" xlink:label="Locator_exc_CashFlowHedgeIneffectivenessDedesignation_5056"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FootnotesToCashFlowHedgeAccumulatedOtherComprehensiveIncomeAbstract_5055" xlink:to="Locator_exc_CashFlowHedgeIneffectivenessDedesignation_5056" order="13.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CashFlowHedgesGainLossLineItems" xlink:label="Locator_exc_CashFlowHedgesGainLossLineItems_5057"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CashFlowHedgeActivityImpactAbstract" xlink:label="Locator_exc_CashFlowHedgeActivityImpactAbstract_5058"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_CashFlowHedgesGainLossLineItems_5057" xlink:to="Locator_exc_CashFlowHedgeActivityImpactAbstract_5058" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CashFlowHedgeActivityImpactAbstract" xlink:label="Locator_exc_CashFlowHedgeActivityImpactAbstract_5059"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_UnrealizedGainLossOnPriceRiskCashFlowDerivativesBeforeTax" xlink:label="Locator_us-gaap_UnrealizedGainLossOnPriceRiskCashFlowDerivativesBeforeTax_5060"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_CashFlowHedgeActivityImpactAbstract_5059" xlink:to="Locator_us-gaap_UnrealizedGainLossOnPriceRiskCashFlowDerivativesBeforeTax_5060" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CashFlowHedgeActivityImpactAbstract" xlink:label="Locator_exc_CashFlowHedgeActivityImpactAbstract_5061"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_UnrealizedGainLossOnCashFlowHedgesPreTaxAccumulatedOtherComprehensiveIncomeSwapContract" xlink:label="Locator_exc_UnrealizedGainLossOnCashFlowHedgesPreTaxAccumulatedOtherComprehensiveIncomeSwapContract_5062"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_CashFlowHedgeActivityImpactAbstract_5061" xlink:to="Locator_exc_UnrealizedGainLossOnCashFlowHedgesPreTaxAccumulatedOtherComprehensiveIncomeSwapContract_5062" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CashFlowHedgeActivityImpactAbstract" xlink:label="Locator_exc_CashFlowHedgeActivityImpactAbstract_5063"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CashFlowHedgeGainLossToBeReclassifiedWithinTwelveMonths" xlink:label="Locator_us-gaap_CashFlowHedgeGainLossToBeReclassifiedWithinTwelveMonths_5064"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_CashFlowHedgeActivityImpactAbstract_5063" xlink:to="Locator_us-gaap_CashFlowHedgeGainLossToBeReclassifiedWithinTwelveMonths_5064" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CashFlowHedgeActivityImpactAbstract" xlink:label="Locator_exc_CashFlowHedgeActivityImpactAbstract_5065"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CashFlowHedgeGainLossToBeReclassifiedWithInTwelveMonthsSwapContract" xlink:label="Locator_exc_CashFlowHedgeGainLossToBeReclassifiedWithInTwelveMonthsSwapContract_5066"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_CashFlowHedgeActivityImpactAbstract_5065" xlink:to="Locator_exc_CashFlowHedgeGainLossToBeReclassifiedWithInTwelveMonthsSwapContract_5066" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CashFlowHedgeActivityImpactAbstract" xlink:label="Locator_exc_CashFlowHedgeActivityImpactAbstract_5067"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CashFlowHedgeGainLossToBeReclassifiedWithinTwelveMonthsBlockContract" xlink:label="Locator_exc_CashFlowHedgeGainLossToBeReclassifiedWithinTwelveMonthsBlockContract_5068"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_CashFlowHedgeActivityImpactAbstract_5067" xlink:to="Locator_exc_CashFlowHedgeGainLossToBeReclassifiedWithinTwelveMonthsBlockContract_5068" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CashFlowHedgeActivityImpactAbstract" xlink:label="Locator_exc_CashFlowHedgeActivityImpactAbstract_5069"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CashFlowHedgeGainLossReclassifiedToPretaxNetIncomeFromAccumulatedOtherComprehensiveIncome" xlink:label="Locator_exc_CashFlowHedgeGainLossReclassifiedToPretaxNetIncomeFromAccumulatedOtherComprehensiveIncome_5070"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_CashFlowHedgeActivityImpactAbstract_5069" xlink:to="Locator_exc_CashFlowHedgeGainLossReclassifiedToPretaxNetIncomeFromAccumulatedOtherComprehensiveIncome_5070" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CashFlowHedgeActivityImpactAbstract" xlink:label="Locator_exc_CashFlowHedgeActivityImpactAbstract_5071"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ChangeInCashFlowHedgeIneffectiveness" xlink:label="Locator_exc_ChangeInCashFlowHedgeIneffectiveness_5072"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_CashFlowHedgeActivityImpactAbstract_5071" xlink:to="Locator_exc_ChangeInCashFlowHedgeIneffectiveness_5072" order="7.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CashFlowHedgeActivityImpactAbstract" xlink:label="Locator_exc_CashFlowHedgeActivityImpactAbstract_5073"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CashFlowHedgeIneffectivenessAdjustmentToAccumulatedOtherComprehensiveIncome" xlink:label="Locator_exc_CashFlowHedgeIneffectivenessAdjustmentToAccumulatedOtherComprehensiveIncome_5074"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_CashFlowHedgeActivityImpactAbstract_5073" xlink:to="Locator_exc_CashFlowHedgeIneffectivenessAdjustmentToAccumulatedOtherComprehensiveIncome_5074" order="8.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OtherDerivativesGainLossByIncomeStatementLocationLineItems" xlink:label="Locator_exc_OtherDerivativesGainLossByIncomeStatementLocationLineItems_4825"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OtherDerivativesNotDesignatedAsHedgingInstrumentsTable" xlink:label="Locator_exc_OtherDerivativesNotDesignatedAsHedgingInstrumentsTable_4826"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="Locator_exc_OtherDerivativesGainLossByIncomeStatementLocationLineItems_4825" xlink:to="Locator_exc_OtherDerivativesNotDesignatedAsHedgingInstrumentsTable_4826" order="0.5" xbrldt:contextElement="segment" xbrldt:closed="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OtherDerivativesNotDesignatedAsHedgingInstrumentsTable" xlink:label="Locator_exc_OtherDerivativesNotDesignatedAsHedgingInstrumentsTable_4897"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_4898"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_exc_OtherDerivativesNotDesignatedAsHedgingInstrumentsTable_4897" xlink:to="Locator_dei_LegalEntityAxis_4898" order="0.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OtherDerivativesNotDesignatedAsHedgingInstrumentsTable" xlink:label="Locator_exc_OtherDerivativesNotDesignatedAsHedgingInstrumentsTable_4899"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OtherDerivativesGainLossByIncomeStatementLocationAxis" xlink:label="Locator_exc_OtherDerivativesGainLossByIncomeStatementLocationAxis_4900"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_exc_OtherDerivativesNotDesignatedAsHedgingInstrumentsTable_4899" xlink:to="Locator_exc_OtherDerivativesGainLossByIncomeStatementLocationAxis_4900" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OtherDerivativesGainLossByIncomeStatementLocationAxis" xlink:label="Locator_exc_OtherDerivativesGainLossByIncomeStatementLocationAxis_4719"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CashFlowHedgesIncomeLocationDomain" xlink:label="Locator_exc_CashFlowHedgesIncomeLocationDomain_4720"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="Locator_exc_OtherDerivativesGainLossByIncomeStatementLocationAxis_4719" xlink:to="Locator_exc_CashFlowHedgesIncomeLocationDomain_4720" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OtherDerivativesGainLossByIncomeStatementLocationAxis" xlink:label="Locator_exc_OtherDerivativesGainLossByIncomeStatementLocationAxis_4943"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CashFlowHedgesIncomeLocationDomain" xlink:label="Locator_exc_CashFlowHedgesIncomeLocationDomain_4944"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_exc_OtherDerivativesGainLossByIncomeStatementLocationAxis_4943" xlink:to="Locator_exc_CashFlowHedgesIncomeLocationDomain_4944" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OtherDerivativesNotDesignatedAsHedgingInstrumentsTable" xlink:label="Locator_exc_OtherDerivativesNotDesignatedAsHedgingInstrumentsTable_4901"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementScenarioAxis" xlink:label="Locator_us-gaap_StatementScenarioAxis_4902"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_exc_OtherDerivativesNotDesignatedAsHedgingInstrumentsTable_4901" xlink:to="Locator_us-gaap_StatementScenarioAxis_4902" order="2.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OtherDerivativesNotDesignatedAsHedgingInstrumentsTable" xlink:label="Locator_exc_OtherDerivativesNotDesignatedAsHedgingInstrumentsTable_4903"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SegmentConsolidatingItemsAxis" xlink:label="Locator_exc_SegmentConsolidatingItemsAxis_4904"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_exc_OtherDerivativesNotDesignatedAsHedgingInstrumentsTable_4903" xlink:to="Locator_exc_SegmentConsolidatingItemsAxis_4904" order="3.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SegmentConsolidatingItemsAxis" xlink:label="Locator_exc_SegmentConsolidatingItemsAxis_4949"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SegmentConsolidatingItemsDomain" xlink:label="Locator_exc_SegmentConsolidatingItemsDomain_4950"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_exc_SegmentConsolidatingItemsAxis_4949" xlink:to="Locator_exc_SegmentConsolidatingItemsDomain_4950" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SegmentConsolidatingItemsDomain" xlink:label="Locator_exc_SegmentConsolidatingItemsDomain_4951"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessIntersegmentEliminationsMember" xlink:label="Locator_us-gaap_BusinessIntersegmentEliminationsMember_4952"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_SegmentConsolidatingItemsDomain_4951" xlink:to="Locator_us-gaap_BusinessIntersegmentEliminationsMember_4952" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OtherDerivativesGainLossByIncomeStatementLocationLineItems" xlink:label="Locator_exc_OtherDerivativesGainLossByIncomeStatementLocationLineItems_5075"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OtherDerivativesNotDesignatedAsHedgingInstrumentsAbstract" xlink:label="Locator_exc_OtherDerivativesNotDesignatedAsHedgingInstrumentsAbstract_5076"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_OtherDerivativesGainLossByIncomeStatementLocationLineItems_5075" xlink:to="Locator_exc_OtherDerivativesNotDesignatedAsHedgingInstrumentsAbstract_5076" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OtherDerivativesNotDesignatedAsHedgingInstrumentsAbstract" xlink:label="Locator_exc_OtherDerivativesNotDesignatedAsHedgingInstrumentsAbstract_5077"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OtherDerivativesNotDesignatedAsHedgingInstrumentsChangeInFairValue" xlink:label="Locator_exc_OtherDerivativesNotDesignatedAsHedgingInstrumentsChangeInFairValue_5078"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_OtherDerivativesNotDesignatedAsHedgingInstrumentsAbstract_5077" xlink:to="Locator_exc_OtherDerivativesNotDesignatedAsHedgingInstrumentsChangeInFairValue_5078" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OtherDerivativesNotDesignatedAsHedgingInstrumentsAbstract" xlink:label="Locator_exc_OtherDerivativesNotDesignatedAsHedgingInstrumentsAbstract_5079"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OtherDerivativesNotDesignatedAsHedgingInstrumentsReclassificationToRealizedAtSettlement" xlink:label="Locator_exc_OtherDerivativesNotDesignatedAsHedgingInstrumentsReclassificationToRealizedAtSettlement_5080"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_OtherDerivativesNotDesignatedAsHedgingInstrumentsAbstract_5079" xlink:to="Locator_exc_OtherDerivativesNotDesignatedAsHedgingInstrumentsReclassificationToRealizedAtSettlement_5080" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OtherDerivativesNotDesignatedAsHedgingInstrumentsAbstract" xlink:label="Locator_exc_OtherDerivativesNotDesignatedAsHedgingInstrumentsAbstract_5081"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OtherDerivativesNotDesignatedAsHedgingInstrumentsGainLossNet" xlink:label="Locator_exc_OtherDerivativesNotDesignatedAsHedgingInstrumentsGainLossNet_5082"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_OtherDerivativesNotDesignatedAsHedgingInstrumentsAbstract_5081" xlink:to="Locator_exc_OtherDerivativesNotDesignatedAsHedgingInstrumentsGainLossNet_5082" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ProprietaryTradingActivitiesGainLossByIncomeStatementLocationLineItems" xlink:label="Locator_exc_ProprietaryTradingActivitiesGainLossByIncomeStatementLocationLineItems_4829"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ProprietaryTradingActivitiesTable" xlink:label="Locator_exc_ProprietaryTradingActivitiesTable_4830"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="Locator_exc_ProprietaryTradingActivitiesGainLossByIncomeStatementLocationLineItems_4829" xlink:to="Locator_exc_ProprietaryTradingActivitiesTable_4830" order="0.5" xbrldt:contextElement="segment" xbrldt:closed="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ProprietaryTradingActivitiesTable" xlink:label="Locator_exc_ProprietaryTradingActivitiesTable_4905"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_4906"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_exc_ProprietaryTradingActivitiesTable_4905" xlink:to="Locator_dei_LegalEntityAxis_4906" order="0.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ProprietaryTradingActivitiesTable" xlink:label="Locator_exc_ProprietaryTradingActivitiesTable_4907"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ProprietaryTradingActivitiesGainLossByIncomeStatementLocationAxis" xlink:label="Locator_exc_ProprietaryTradingActivitiesGainLossByIncomeStatementLocationAxis_4908"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_exc_ProprietaryTradingActivitiesTable_4907" xlink:to="Locator_exc_ProprietaryTradingActivitiesGainLossByIncomeStatementLocationAxis_4908" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ProprietaryTradingActivitiesGainLossByIncomeStatementLocationAxis" xlink:label="Locator_exc_ProprietaryTradingActivitiesGainLossByIncomeStatementLocationAxis_4721"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ProprietaryTradingActivitiesIncomeLocationDomain" xlink:label="Locator_exc_ProprietaryTradingActivitiesIncomeLocationDomain_4722"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="Locator_exc_ProprietaryTradingActivitiesGainLossByIncomeStatementLocationAxis_4721" xlink:to="Locator_exc_ProprietaryTradingActivitiesIncomeLocationDomain_4722" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ProprietaryTradingActivitiesGainLossByIncomeStatementLocationAxis" xlink:label="Locator_exc_ProprietaryTradingActivitiesGainLossByIncomeStatementLocationAxis_4945"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ProprietaryTradingActivitiesIncomeLocationDomain" xlink:label="Locator_exc_ProprietaryTradingActivitiesIncomeLocationDomain_4946"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_exc_ProprietaryTradingActivitiesGainLossByIncomeStatementLocationAxis_4945" xlink:to="Locator_exc_ProprietaryTradingActivitiesIncomeLocationDomain_4946" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ProprietaryTradingActivitiesIncomeLocationDomain" xlink:label="Locator_exc_ProprietaryTradingActivitiesIncomeLocationDomain_4947"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OperatingRevenueMember" xlink:label="Locator_exc_OperatingRevenueMember_4948"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_ProprietaryTradingActivitiesIncomeLocationDomain_4947" xlink:to="Locator_exc_OperatingRevenueMember_4948" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ProprietaryTradingActivitiesGainLossByIncomeStatementLocationLineItems" xlink:label="Locator_exc_ProprietaryTradingActivitiesGainLossByIncomeStatementLocationLineItems_5083"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ProprietaryTradingActivitiesAbstract" xlink:label="Locator_exc_ProprietaryTradingActivitiesAbstract_5084"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_ProprietaryTradingActivitiesGainLossByIncomeStatementLocationLineItems_5083" xlink:to="Locator_exc_ProprietaryTradingActivitiesAbstract_5084" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ProprietaryTradingActivitiesAbstract" xlink:label="Locator_exc_ProprietaryTradingActivitiesAbstract_5085"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ProprietaryTradingActivitiesChangeInFairValue" xlink:label="Locator_exc_ProprietaryTradingActivitiesChangeInFairValue_5086"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_ProprietaryTradingActivitiesAbstract_5085" xlink:to="Locator_exc_ProprietaryTradingActivitiesChangeInFairValue_5086" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ProprietaryTradingActivitiesAbstract" xlink:label="Locator_exc_ProprietaryTradingActivitiesAbstract_5087"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ProprietaryTradingActivitiesReclassificationToRealizedAtSettlement" xlink:label="Locator_exc_ProprietaryTradingActivitiesReclassificationToRealizedAtSettlement_5088"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_ProprietaryTradingActivitiesAbstract_5087" xlink:to="Locator_exc_ProprietaryTradingActivitiesReclassificationToRealizedAtSettlement_5088" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ProprietaryTradingActivitiesAbstract" xlink:label="Locator_exc_ProprietaryTradingActivitiesAbstract_5089"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ProprietaryTradingActivitiesGainLossNet" xlink:label="Locator_exc_ProprietaryTradingActivitiesGainLossNet_5090"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_ProprietaryTradingActivitiesAbstract_5089" xlink:to="Locator_exc_ProprietaryTradingActivitiesGainLossNet_5090" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DerivativesFairValueLineItems" xlink:label="Locator_us-gaap_DerivativesFairValueLineItems_4747"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable" xlink:label="Locator_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_4748"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="Locator_us-gaap_DerivativesFairValueLineItems_4747" xlink:to="Locator_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_4748" order="0.5" xbrldt:contextElement="segment" xbrldt:closed="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable" xlink:label="Locator_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_4887"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_4888"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_4887" xlink:to="Locator_dei_LegalEntityAxis_4888" order="0.0"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable" xlink:label="Locator_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_4889"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DerivativeInstrumentRiskAxis" xlink:label="Locator_us-gaap_DerivativeInstrumentRiskAxis_4890"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_4889" xlink:to="Locator_us-gaap_DerivativeInstrumentRiskAxis_4890" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DerivativeInstrumentRiskAxis" xlink:label="Locator_us-gaap_DerivativeInstrumentRiskAxis_4713"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DerivativeContractTypeDomain" xlink:label="Locator_us-gaap_DerivativeContractTypeDomain_4714"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="Locator_us-gaap_DerivativeInstrumentRiskAxis_4713" xlink:to="Locator_us-gaap_DerivativeContractTypeDomain_4714" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DerivativeInstrumentRiskAxis" xlink:label="Locator_us-gaap_DerivativeInstrumentRiskAxis_4909"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DerivativeContractTypeDomain" xlink:label="Locator_us-gaap_DerivativeContractTypeDomain_4910"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_us-gaap_DerivativeInstrumentRiskAxis_4909" xlink:to="Locator_us-gaap_DerivativeContractTypeDomain_4910" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DerivativeContractTypeDomain" xlink:label="Locator_us-gaap_DerivativeContractTypeDomain_4911"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DerivativeMember" xlink:label="Locator_us-gaap_DerivativeMember_4912"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DerivativeContractTypeDomain_4911" xlink:to="Locator_us-gaap_DerivativeMember_4912" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DerivativeContractTypeDomain" xlink:label="Locator_us-gaap_DerivativeContractTypeDomain_4913"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DesignatedAsHedgingInstrumentMember" xlink:label="Locator_us-gaap_DesignatedAsHedgingInstrumentMember_4914"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DerivativeContractTypeDomain_4913" xlink:to="Locator_us-gaap_DesignatedAsHedgingInstrumentMember_4914" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DerivativeContractTypeDomain" xlink:label="Locator_us-gaap_DerivativeContractTypeDomain_4915"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CashFlowHedgingMember" xlink:label="Locator_us-gaap_CashFlowHedgingMember_4916"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DerivativeContractTypeDomain_4915" xlink:to="Locator_us-gaap_CashFlowHedgingMember_4916" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DerivativeContractTypeDomain" xlink:label="Locator_us-gaap_DerivativeContractTypeDomain_4917"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ProprietaryTradingMember" xlink:label="Locator_exc_ProprietaryTradingMember_4918"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DerivativeContractTypeDomain_4917" xlink:to="Locator_exc_ProprietaryTradingMember_4918" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DerivativeContractTypeDomain" xlink:label="Locator_us-gaap_DerivativeContractTypeDomain_4919"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CollateralAndNettingMember" xlink:label="Locator_exc_CollateralAndNettingMember_4920"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DerivativeContractTypeDomain_4919" xlink:to="Locator_exc_CollateralAndNettingMember_4920" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DerivativeContractTypeDomain" xlink:label="Locator_us-gaap_DerivativeContractTypeDomain_4921"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessIntersegmentEliminationsMember" xlink:label="Locator_us-gaap_BusinessIntersegmentEliminationsMember_4922"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DerivativeContractTypeDomain_4921" xlink:to="Locator_us-gaap_BusinessIntersegmentEliminationsMember_4922" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DerivativesFairValueLineItems" xlink:label="Locator_us-gaap_DerivativesFairValueLineItems_4965"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CommodityDerivativeAssetsCurrent" xlink:label="Locator_exc_CommodityDerivativeAssetsCurrent_4966"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DerivativesFairValueLineItems_4965" xlink:to="Locator_exc_CommodityDerivativeAssetsCurrent_4966" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DerivativesFairValueLineItems" xlink:label="Locator_us-gaap_DerivativesFairValueLineItems_4967"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AffiliateDerivativeAssetsCurrent" xlink:label="Locator_exc_AffiliateDerivativeAssetsCurrent_4968"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DerivativesFairValueLineItems_4967" xlink:to="Locator_exc_AffiliateDerivativeAssetsCurrent_4968" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DerivativesFairValueLineItems" xlink:label="Locator_us-gaap_DerivativesFairValueLineItems_4969"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CommodityDerivativeAssetsNoncurrent" xlink:label="Locator_exc_CommodityDerivativeAssetsNoncurrent_4970"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DerivativesFairValueLineItems_4969" xlink:to="Locator_exc_CommodityDerivativeAssetsNoncurrent_4970" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DerivativesFairValueLineItems" xlink:label="Locator_us-gaap_DerivativesFairValueLineItems_4971"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AffiliateDerivativeAssetsNoncurrent" xlink:label="Locator_exc_AffiliateDerivativeAssetsNoncurrent_4972"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DerivativesFairValueLineItems_4971" xlink:to="Locator_exc_AffiliateDerivativeAssetsNoncurrent_4972" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DerivativesFairValueLineItems" xlink:label="Locator_us-gaap_DerivativesFairValueLineItems_4973"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_TotalMarkToMarketDerivativeAssets" xlink:label="Locator_exc_TotalMarkToMarketDerivativeAssets_4974"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DerivativesFairValueLineItems_4973" xlink:to="Locator_exc_TotalMarkToMarketDerivativeAssets_4974" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DerivativesFairValueLineItems" xlink:label="Locator_us-gaap_DerivativesFairValueLineItems_4975"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CommodityDerivativeLiabilitiesCurrent" xlink:label="Locator_exc_CommodityDerivativeLiabilitiesCurrent_4976"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DerivativesFairValueLineItems_4975" xlink:to="Locator_exc_CommodityDerivativeLiabilitiesCurrent_4976" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DerivativesFairValueLineItems" xlink:label="Locator_us-gaap_DerivativesFairValueLineItems_4977"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AffiliateDerivativeLiabilitiesCurrent" xlink:label="Locator_exc_AffiliateDerivativeLiabilitiesCurrent_4978"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DerivativesFairValueLineItems_4977" xlink:to="Locator_exc_AffiliateDerivativeLiabilitiesCurrent_4978" order="7.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DerivativesFairValueLineItems" xlink:label="Locator_us-gaap_DerivativesFairValueLineItems_4979"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CommodityDerivativeLiabilitiesNoncurrent" xlink:label="Locator_exc_CommodityDerivativeLiabilitiesNoncurrent_4980"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DerivativesFairValueLineItems_4979" xlink:to="Locator_exc_CommodityDerivativeLiabilitiesNoncurrent_4980" order="8.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DerivativesFairValueLineItems" xlink:label="Locator_us-gaap_DerivativesFairValueLineItems_4981"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AffiliateDerivativeLiabilitiesNoncurrent" xlink:label="Locator_exc_AffiliateDerivativeLiabilitiesNoncurrent_4982"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DerivativesFairValueLineItems_4981" xlink:to="Locator_exc_AffiliateDerivativeLiabilitiesNoncurrent_4982" order="9.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DerivativesFairValueLineItems" xlink:label="Locator_us-gaap_DerivativesFairValueLineItems_4983"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_TotalMarkToMarketDerivativeLiabilities" xlink:label="Locator_exc_TotalMarkToMarketDerivativeLiabilities_4984"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DerivativesFairValueLineItems_4983" xlink:to="Locator_exc_TotalMarkToMarketDerivativeLiabilities_4984" order="10.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DerivativesFairValueLineItems" xlink:label="Locator_us-gaap_DerivativesFairValueLineItems_4985"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DerivativeFairValueOfDerivativeNet" xlink:label="Locator_us-gaap_DerivativeFairValueOfDerivativeNet_4986"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DerivativesFairValueLineItems_4985" xlink:to="Locator_us-gaap_DerivativeFairValueOfDerivativeNet_4986" order="11.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DerivativesFairValueLineItems" xlink:label="Locator_us-gaap_DerivativesFairValueLineItems_4987"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FootnotesToDerivativeInstrumentsInStatementOfFinancialPositionFairValueAbstract" xlink:label="Locator_exc_FootnotesToDerivativeInstrumentsInStatementOfFinancialPositionFairValueAbstract_4988"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DerivativesFairValueLineItems_4987" xlink:to="Locator_exc_FootnotesToDerivativeInstrumentsInStatementOfFinancialPositionFairValueAbstract_4988" order="12.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FootnotesToDerivativeInstrumentsInStatementOfFinancialPositionFairValueAbstract" xlink:label="Locator_exc_FootnotesToDerivativeInstrumentsInStatementOfFinancialPositionFairValueAbstract_4989"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueSwapContractCurrentAssets" xlink:label="Locator_exc_FairValueSwapContractCurrentAssets_4990"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FootnotesToDerivativeInstrumentsInStatementOfFinancialPositionFairValueAbstract_4989" xlink:to="Locator_exc_FairValueSwapContractCurrentAssets_4990" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FootnotesToDerivativeInstrumentsInStatementOfFinancialPositionFairValueAbstract" xlink:label="Locator_exc_FootnotesToDerivativeInstrumentsInStatementOfFinancialPositionFairValueAbstract_4991"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueSwapContractNoncurrentAssets" xlink:label="Locator_exc_FairValueSwapContractNoncurrentAssets_4992"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FootnotesToDerivativeInstrumentsInStatementOfFinancialPositionFairValueAbstract_4991" xlink:to="Locator_exc_FairValueSwapContractNoncurrentAssets_4992" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FootnotesToDerivativeInstrumentsInStatementOfFinancialPositionFairValueAbstract" xlink:label="Locator_exc_FootnotesToDerivativeInstrumentsInStatementOfFinancialPositionFairValueAbstract_4993"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueSwapContractCurrentLiability" xlink:label="Locator_exc_FairValueSwapContractCurrentLiability_4994"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FootnotesToDerivativeInstrumentsInStatementOfFinancialPositionFairValueAbstract_4993" xlink:to="Locator_exc_FairValueSwapContractCurrentLiability_4994" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FootnotesToDerivativeInstrumentsInStatementOfFinancialPositionFairValueAbstract" xlink:label="Locator_exc_FootnotesToDerivativeInstrumentsInStatementOfFinancialPositionFairValueAbstract_4995"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueSwapContractNoncurrentLiabilities" xlink:label="Locator_exc_FairValueSwapContractNoncurrentLiabilities_4996"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FootnotesToDerivativeInstrumentsInStatementOfFinancialPositionFairValueAbstract_4995" xlink:to="Locator_exc_FairValueSwapContractNoncurrentLiabilities_4996" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FootnotesToDerivativeInstrumentsInStatementOfFinancialPositionFairValueAbstract" xlink:label="Locator_exc_FootnotesToDerivativeInstrumentsInStatementOfFinancialPositionFairValueAbstract_4997"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DoeInterestRateSwapNoncurrentPortion" xlink:label="Locator_exc_DoeInterestRateSwapNoncurrentPortion_4998"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FootnotesToDerivativeInstrumentsInStatementOfFinancialPositionFairValueAbstract_4997" xlink:to="Locator_exc_DoeInterestRateSwapNoncurrentPortion_4998" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FootnotesToDerivativeInstrumentsInStatementOfFinancialPositionFairValueAbstract" xlink:label="Locator_exc_FootnotesToDerivativeInstrumentsInStatementOfFinancialPositionFairValueAbstract_4999"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CollateralAmountOffsetAgainstFairValueOfDerivativeCurrentAsset" xlink:label="Locator_exc_CollateralAmountOffsetAgainstFairValueOfDerivativeCurrentAsset_5000"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FootnotesToDerivativeInstrumentsInStatementOfFinancialPositionFairValueAbstract_4999" xlink:to="Locator_exc_CollateralAmountOffsetAgainstFairValueOfDerivativeCurrentAsset_5000" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FootnotesToDerivativeInstrumentsInStatementOfFinancialPositionFairValueAbstract" xlink:label="Locator_exc_FootnotesToDerivativeInstrumentsInStatementOfFinancialPositionFairValueAbstract_5001"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CollateralAmountOffsetAgainstFairValueOfDerivativesNoncurrentAsset" xlink:label="Locator_exc_CollateralAmountOffsetAgainstFairValueOfDerivativesNoncurrentAsset_5002"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FootnotesToDerivativeInstrumentsInStatementOfFinancialPositionFairValueAbstract_5001" xlink:to="Locator_exc_CollateralAmountOffsetAgainstFairValueOfDerivativesNoncurrentAsset_5002" order="7.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FootnotesToDerivativeInstrumentsInStatementOfFinancialPositionFairValueAbstract" xlink:label="Locator_exc_FootnotesToDerivativeInstrumentsInStatementOfFinancialPositionFairValueAbstract_5003"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CollateralAmountOffsetAgainstFairValueOfDerivativeCurrentLiability" xlink:label="Locator_exc_CollateralAmountOffsetAgainstFairValueOfDerivativeCurrentLiability_5004"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FootnotesToDerivativeInstrumentsInStatementOfFinancialPositionFairValueAbstract_5003" xlink:to="Locator_exc_CollateralAmountOffsetAgainstFairValueOfDerivativeCurrentLiability_5004" order="8.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FootnotesToDerivativeInstrumentsInStatementOfFinancialPositionFairValueAbstract" xlink:label="Locator_exc_FootnotesToDerivativeInstrumentsInStatementOfFinancialPositionFairValueAbstract_5005"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CollateralAmountOffsetAgainstFairValueOfDerivativeCurrentNoncurrentLiability" xlink:label="Locator_exc_CollateralAmountOffsetAgainstFairValueOfDerivativeCurrentNoncurrentLiability_5006"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FootnotesToDerivativeInstrumentsInStatementOfFinancialPositionFairValueAbstract_5005" xlink:to="Locator_exc_CollateralAmountOffsetAgainstFairValueOfDerivativeCurrentNoncurrentLiability_5006" order="9.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FootnotesToDerivativeInstrumentsInStatementOfFinancialPositionFairValueAbstract" xlink:label="Locator_exc_FootnotesToDerivativeInstrumentsInStatementOfFinancialPositionFairValueAbstract_5007"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CollateralReceivedNetOfCollateralPostedOffsetAgainstFairValueOfDerivativeAssetsAndLiabilities" xlink:label="Locator_exc_CollateralReceivedNetOfCollateralPostedOffsetAgainstFairValueOfDerivativeAssetsAndLiabilities_5008"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FootnotesToDerivativeInstrumentsInStatementOfFinancialPositionFairValueAbstract_5007" xlink:to="Locator_exc_CollateralReceivedNetOfCollateralPostedOffsetAgainstFairValueOfDerivativeAssetsAndLiabilities_5008" order="10.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FootnotesToDerivativeInstrumentsInStatementOfFinancialPositionFairValueAbstract" xlink:label="Locator_exc_FootnotesToDerivativeInstrumentsInStatementOfFinancialPositionFairValueAbstract_5009"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueBlockContractCurrentAssets" xlink:label="Locator_exc_FairValueBlockContractCurrentAssets_5010"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FootnotesToDerivativeInstrumentsInStatementOfFinancialPositionFairValueAbstract_5009" xlink:to="Locator_exc_FairValueBlockContractCurrentAssets_5010" order="11.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FootnotesToDerivativeInstrumentsInStatementOfFinancialPositionFairValueAbstract" xlink:label="Locator_exc_FootnotesToDerivativeInstrumentsInStatementOfFinancialPositionFairValueAbstract_5011"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueBlockContractNoncurrentAssets" xlink:label="Locator_exc_FairValueBlockContractNoncurrentAssets_5012"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FootnotesToDerivativeInstrumentsInStatementOfFinancialPositionFairValueAbstract_5011" xlink:to="Locator_exc_FairValueBlockContractNoncurrentAssets_5012" order="12.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FootnotesToDerivativeInstrumentsInStatementOfFinancialPositionFairValueAbstract" xlink:label="Locator_exc_FootnotesToDerivativeInstrumentsInStatementOfFinancialPositionFairValueAbstract_5013"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueBlockContractCurrentLiabilities" xlink:label="Locator_exc_FairValueBlockContractCurrentLiabilities_5014"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FootnotesToDerivativeInstrumentsInStatementOfFinancialPositionFairValueAbstract_5013" xlink:to="Locator_exc_FairValueBlockContractCurrentLiabilities_5014" order="13.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FootnotesToDerivativeInstrumentsInStatementOfFinancialPositionFairValueAbstract" xlink:label="Locator_exc_FootnotesToDerivativeInstrumentsInStatementOfFinancialPositionFairValueAbstract_5015"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueBlockContractNoncurrentLiabilities" xlink:label="Locator_exc_FairValueBlockContractNoncurrentLiabilities_5016"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FootnotesToDerivativeInstrumentsInStatementOfFinancialPositionFairValueAbstract_5015" xlink:to="Locator_exc_FairValueBlockContractNoncurrentLiabilities_5016" order="14.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FootnotesToDerivativeInstrumentsInStatementOfFinancialPositionFairValueAbstract" xlink:label="Locator_exc_FootnotesToDerivativeInstrumentsInStatementOfFinancialPositionFairValueAbstract_5017"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NoncurrentLiabilityInterestRateSwapAvsr" xlink:label="Locator_exc_NoncurrentLiabilityInterestRateSwapAvsr_5018"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FootnotesToDerivativeInstrumentsInStatementOfFinancialPositionFairValueAbstract_5017" xlink:to="Locator_exc_NoncurrentLiabilityInterestRateSwapAvsr_5018" order="15.0" xbrldt:usable="true"/> |
| | </definitionLink> |
| <definitionLink xlink:type="extended" xlink:role="http://exeloncorp.com/role/DisclosureCommitmentsAndContingenciesTables"> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_5199"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_5200"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_dei_LegalEntityAxis_5199" xlink:to="Locator_dei_EntityDomain_5200" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_5201"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ExelonGenerationCoLLCMember" xlink:label="Locator_exc_ExelonGenerationCoLLCMember_5202"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_5201" xlink:to="Locator_exc_ExelonGenerationCoLLCMember_5202" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_5203"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CommonwealthEdisonCoMember" xlink:label="Locator_exc_CommonwealthEdisonCoMember_5204"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_5203" xlink:to="Locator_exc_CommonwealthEdisonCoMember_5204" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_5205"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PecoEnergyCoMember" xlink:label="Locator_exc_PecoEnergyCoMember_5206"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_5205" xlink:to="Locator_exc_PecoEnergyCoMember_5206" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_5207"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BaltimoreGasAndElectricCompanyMember" xlink:label="Locator_exc_BaltimoreGasAndElectricCompanyMember_5208"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_5207" xlink:to="Locator_exc_BaltimoreGasAndElectricCompanyMember_5208" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CommitmentsAndContingenciesTablesDisclosureLineItems" xlink:label="Locator_exc_CommitmentsAndContingenciesTablesDisclosureLineItems_5193"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CommitmentsAndContingenciesTablesDisclosureTable" xlink:label="Locator_exc_CommitmentsAndContingenciesTablesDisclosureTable_5194"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="Locator_exc_CommitmentsAndContingenciesTablesDisclosureLineItems_5193" xlink:to="Locator_exc_CommitmentsAndContingenciesTablesDisclosureTable_5194" order="0.5" xbrldt:contextElement="segment" xbrldt:closed="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CommitmentsAndContingenciesTablesDisclosureTable" xlink:label="Locator_exc_CommitmentsAndContingenciesTablesDisclosureTable_5197"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_5198"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_exc_CommitmentsAndContingenciesTablesDisclosureTable_5197" xlink:to="Locator_dei_LegalEntityAxis_5198" order="0.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CommitmentsAndContingenciesTablesDisclosureLineItems" xlink:label="Locator_exc_CommitmentsAndContingenciesTablesDisclosureLineItems_5209"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EnergyCommitmentsTextBlock" xlink:label="Locator_exc_EnergyCommitmentsTextBlock_5210"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_CommitmentsAndContingenciesTablesDisclosureLineItems_5209" xlink:to="Locator_exc_EnergyCommitmentsTextBlock_5210" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CommitmentsAndContingenciesTablesDisclosureLineItems" xlink:label="Locator_exc_CommitmentsAndContingenciesTablesDisclosureLineItems_5211"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_UtilityEnergyPurchaseCommitmentsTextBlock" xlink:label="Locator_exc_UtilityEnergyPurchaseCommitmentsTextBlock_5212"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_CommitmentsAndContingenciesTablesDisclosureLineItems_5211" xlink:to="Locator_exc_UtilityEnergyPurchaseCommitmentsTextBlock_5212" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CommitmentsAndContingenciesTablesDisclosureLineItems" xlink:label="Locator_exc_CommitmentsAndContingenciesTablesDisclosureLineItems_5213"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FuelPurchaseCommitmentsTextBlock" xlink:label="Locator_exc_FuelPurchaseCommitmentsTextBlock_5214"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_CommitmentsAndContingenciesTablesDisclosureLineItems_5213" xlink:to="Locator_exc_FuelPurchaseCommitmentsTextBlock_5214" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CommitmentsAndContingenciesTablesDisclosureLineItems" xlink:label="Locator_exc_CommitmentsAndContingenciesTablesDisclosureLineItems_5215"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CommercialCommitmentsTextBlock" xlink:label="Locator_exc_CommercialCommitmentsTextBlock_5216"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_CommitmentsAndContingenciesTablesDisclosureLineItems_5215" xlink:to="Locator_exc_CommercialCommitmentsTextBlock_5216" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CommitmentsAndContingenciesTablesDisclosureLineItems" xlink:label="Locator_exc_CommitmentsAndContingenciesTablesDisclosureLineItems_5217"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RegulatoryConstructionCommitmentTextBlock" xlink:label="Locator_exc_RegulatoryConstructionCommitmentTextBlock_5218"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_CommitmentsAndContingenciesTablesDisclosureLineItems_5217" xlink:to="Locator_exc_RegulatoryConstructionCommitmentTextBlock_5218" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CommitmentsAndContingenciesTablesDisclosureLineItems" xlink:label="Locator_exc_CommitmentsAndContingenciesTablesDisclosureLineItems_5219"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OperatingLeasesOfLesseeDisclosureTextBlock" xlink:label="Locator_us-gaap_OperatingLeasesOfLesseeDisclosureTextBlock_5220"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_CommitmentsAndContingenciesTablesDisclosureLineItems_5219" xlink:to="Locator_us-gaap_OperatingLeasesOfLesseeDisclosureTextBlock_5220" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CommitmentsAndContingenciesTablesDisclosureLineItems" xlink:label="Locator_exc_CommitmentsAndContingenciesTablesDisclosureLineItems_5221"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OperatingLeasesRentExpenseTextBlock" xlink:label="Locator_exc_OperatingLeasesRentExpenseTextBlock_5222"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_CommitmentsAndContingenciesTablesDisclosureLineItems_5221" xlink:to="Locator_exc_OperatingLeasesRentExpenseTextBlock_5222" order="7.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CommitmentsAndContingenciesTablesDisclosureLineItems" xlink:label="Locator_exc_CommitmentsAndContingenciesTablesDisclosureLineItems_5223"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_EnvironmentalLossContingencyDisclosureTextBlock" xlink:label="Locator_us-gaap_EnvironmentalLossContingencyDisclosureTextBlock_5224"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_CommitmentsAndContingenciesTablesDisclosureLineItems_5223" xlink:to="Locator_us-gaap_EnvironmentalLossContingencyDisclosureTextBlock_5224" order="8.0" xbrldt:usable="true"/> |
| | </definitionLink> |
| <definitionLink xlink:type="extended" xlink:role="http://exeloncorp.com/role/DisclosureCommitmentsAndContingenciesDetails"> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_5579"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_5580"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_dei_LegalEntityAxis_5579" xlink:to="Locator_dei_EntityDomain_5580" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_5581"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ExelonGenerationCoLLCMember" xlink:label="Locator_exc_ExelonGenerationCoLLCMember_5582"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_5581" xlink:to="Locator_exc_ExelonGenerationCoLLCMember_5582" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ExelonGenerationCoLLCMember" xlink:label="Locator_exc_ExelonGenerationCoLLCMember_5589"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ZionStationMember" xlink:label="Locator_exc_ZionStationMember_5590"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_ExelonGenerationCoLLCMember_5589" xlink:to="Locator_exc_ZionStationMember_5590" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ExelonGenerationCoLLCMember" xlink:label="Locator_exc_ExelonGenerationCoLLCMember_5591"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ConstellationEnergyNuclearGroupLlcMember" xlink:label="Locator_exc_ConstellationEnergyNuclearGroupLlcMember_5592"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_ExelonGenerationCoLLCMember_5591" xlink:to="Locator_exc_ConstellationEnergyNuclearGroupLlcMember_5592" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_5583"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CommonwealthEdisonCoMember" xlink:label="Locator_exc_CommonwealthEdisonCoMember_5584"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_5583" xlink:to="Locator_exc_CommonwealthEdisonCoMember_5584" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_5585"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PecoEnergyCoMember" xlink:label="Locator_exc_PecoEnergyCoMember_5586"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_5585" xlink:to="Locator_exc_PecoEnergyCoMember_5586" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_5587"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BaltimoreGasAndElectricCompanyMember" xlink:label="Locator_exc_BaltimoreGasAndElectricCompanyMember_5588"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_5587" xlink:to="Locator_exc_BaltimoreGasAndElectricCompanyMember_5588" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FiveYearDisclosureDomain" xlink:label="Locator_us-gaap_FiveYearDisclosureDomain_5593"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_MoreThanTwoButLessThanThreeYearsMember" xlink:label="Locator_exc_MoreThanTwoButLessThanThreeYearsMember_5594"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_FiveYearDisclosureDomain_5593" xlink:to="Locator_exc_MoreThanTwoButLessThanThreeYearsMember_5594" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FiveYearDisclosureDomain" xlink:label="Locator_us-gaap_FiveYearDisclosureDomain_5599"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_MoreThanOneAndWithinThreeYearsFromBalanceSheetDateMember" xlink:label="Locator_exc_MoreThanOneAndWithinThreeYearsFromBalanceSheetDateMember_5600"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_FiveYearDisclosureDomain_5599" xlink:to="Locator_exc_MoreThanOneAndWithinThreeYearsFromBalanceSheetDateMember_5600" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FiveYearDisclosureDomain" xlink:label="Locator_us-gaap_FiveYearDisclosureDomain_5605"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_MoreThanThreeAndWithinFiveYearsFromBalanceSheetDateMember" xlink:label="Locator_exc_MoreThanThreeAndWithinFiveYearsFromBalanceSheetDateMember_5606"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_FiveYearDisclosureDomain_5605" xlink:to="Locator_exc_MoreThanThreeAndWithinFiveYearsFromBalanceSheetDateMember_5606" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FiveYearDisclosureDomain" xlink:label="Locator_us-gaap_FiveYearDisclosureDomain_5611"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_MoreThanOneAndWithinTenYearsFromBalanceSheetDateMember" xlink:label="Locator_exc_MoreThanOneAndWithinTenYearsFromBalanceSheetDateMember_5612"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_FiveYearDisclosureDomain_5611" xlink:to="Locator_exc_MoreThanOneAndWithinTenYearsFromBalanceSheetDateMember_5612" order="9.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FiveYearDisclosureDomain" xlink:label="Locator_us-gaap_FiveYearDisclosureDomain_5613"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_MoreThanOneAndWithinFiveYearsFromBalanceSheetDateMember" xlink:label="Locator_exc_MoreThanOneAndWithinFiveYearsFromBalanceSheetDateMember_5614"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_FiveYearDisclosureDomain_5613" xlink:to="Locator_exc_MoreThanOneAndWithinFiveYearsFromBalanceSheetDateMember_5614" order="10.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FiveYearDisclosureDomain" xlink:label="Locator_us-gaap_FiveYearDisclosureDomain_5615"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_MoreThanOneAndWithinNineYearsFromBalanceSheetDateMember" xlink:label="Locator_exc_MoreThanOneAndWithinNineYearsFromBalanceSheetDateMember_5616"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_FiveYearDisclosureDomain_5615" xlink:to="Locator_exc_MoreThanOneAndWithinNineYearsFromBalanceSheetDateMember_5616" order="11.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FiveYearDisclosureDomain" xlink:label="Locator_us-gaap_FiveYearDisclosureDomain_5617"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_WithinTenYearsFromBalanceSheetDateMember" xlink:label="Locator_exc_WithinTenYearsFromBalanceSheetDateMember_5618"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_FiveYearDisclosureDomain_5617" xlink:to="Locator_exc_WithinTenYearsFromBalanceSheetDateMember_5618" order="12.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FiveYearDisclosureDomain" xlink:label="Locator_us-gaap_FiveYearDisclosureDomain_5607"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_MoreThanFourAndWithinFiveYearsFromBalanceSheetDateMember" xlink:label="Locator_us-gaap_MoreThanFourAndWithinFiveYearsFromBalanceSheetDateMember_5608"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_FiveYearDisclosureDomain_5607" xlink:to="Locator_us-gaap_MoreThanFourAndWithinFiveYearsFromBalanceSheetDateMember_5608" order="7.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FiveYearDisclosureDomain" xlink:label="Locator_us-gaap_FiveYearDisclosureDomain_5609"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_MoreThanFiveYearsFromBalanceSheetDateAndThereafterMember" xlink:label="Locator_us-gaap_MoreThanFiveYearsFromBalanceSheetDateAndThereafterMember_5610"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_FiveYearDisclosureDomain_5609" xlink:to="Locator_us-gaap_MoreThanFiveYearsFromBalanceSheetDateAndThereafterMember_5610" order="8.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FiveYearDisclosureDomain" xlink:label="Locator_us-gaap_FiveYearDisclosureDomain_5595"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OneYearFromBalanceSheetDateMember" xlink:label="Locator_us-gaap_OneYearFromBalanceSheetDateMember_5596"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_FiveYearDisclosureDomain_5595" xlink:to="Locator_us-gaap_OneYearFromBalanceSheetDateMember_5596" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FiveYearDisclosureDomain" xlink:label="Locator_us-gaap_FiveYearDisclosureDomain_5597"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_MoreThanOneAndWithinTwoYearsFromBalanceSheetDateMember" xlink:label="Locator_us-gaap_MoreThanOneAndWithinTwoYearsFromBalanceSheetDateMember_5598"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_FiveYearDisclosureDomain_5597" xlink:to="Locator_us-gaap_MoreThanOneAndWithinTwoYearsFromBalanceSheetDateMember_5598" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FiveYearDisclosureDomain" xlink:label="Locator_us-gaap_FiveYearDisclosureDomain_5601"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_MoreThanTwoAndWithinThreeYearsFromBalanceSheetDateMember" xlink:label="Locator_us-gaap_MoreThanTwoAndWithinThreeYearsFromBalanceSheetDateMember_5602"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_FiveYearDisclosureDomain_5601" xlink:to="Locator_us-gaap_MoreThanTwoAndWithinThreeYearsFromBalanceSheetDateMember_5602" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FiveYearDisclosureDomain" xlink:label="Locator_us-gaap_FiveYearDisclosureDomain_5603"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_MoreThanThreeAndWithinFourYearsFromBalanceSheetDateMember" xlink:label="Locator_us-gaap_MoreThanThreeAndWithinFourYearsFromBalanceSheetDateMember_5604"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_FiveYearDisclosureDomain_5603" xlink:to="Locator_us-gaap_MoreThanThreeAndWithinFourYearsFromBalanceSheetDateMember_5604" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_GuaranteeObligationsByNatureAxis" xlink:label="Locator_us-gaap_GuaranteeObligationsByNatureAxis_5619"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_GuaranteeObligationsNatureDomain" xlink:label="Locator_us-gaap_GuaranteeObligationsNatureDomain_5620"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_us-gaap_GuaranteeObligationsByNatureAxis_5619" xlink:to="Locator_us-gaap_GuaranteeObligationsNatureDomain_5620" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_GuaranteeObligationsNatureDomain" xlink:label="Locator_us-gaap_GuaranteeObligationsNatureDomain_5621"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FinancialStandbyLetterOfCreditMember" xlink:label="Locator_us-gaap_FinancialStandbyLetterOfCreditMember_5622"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_GuaranteeObligationsNatureDomain_5621" xlink:to="Locator_us-gaap_FinancialStandbyLetterOfCreditMember_5622" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_GuaranteeObligationsNatureDomain" xlink:label="Locator_us-gaap_GuaranteeObligationsNatureDomain_5623"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SuretyBondMember" xlink:label="Locator_exc_SuretyBondMember_5624"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_GuaranteeObligationsNatureDomain_5623" xlink:to="Locator_exc_SuretyBondMember_5624" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_GuaranteeObligationsNatureDomain" xlink:label="Locator_us-gaap_GuaranteeObligationsNatureDomain_5625"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PropertyLeaseGuaranteeMember" xlink:label="Locator_us-gaap_PropertyLeaseGuaranteeMember_5626"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_GuaranteeObligationsNatureDomain_5625" xlink:to="Locator_us-gaap_PropertyLeaseGuaranteeMember_5626" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_GuaranteeObligationsNatureDomain" xlink:label="Locator_us-gaap_GuaranteeObligationsNatureDomain_5627"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PerformanceGuaranteeMember" xlink:label="Locator_us-gaap_PerformanceGuaranteeMember_5628"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_GuaranteeObligationsNatureDomain_5627" xlink:to="Locator_us-gaap_PerformanceGuaranteeMember_5628" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_GuaranteeObligationsNatureDomain" xlink:label="Locator_us-gaap_GuaranteeObligationsNatureDomain_5629"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EnergyContractGuaranteeMember" xlink:label="Locator_exc_EnergyContractGuaranteeMember_5630"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_GuaranteeObligationsNatureDomain_5629" xlink:to="Locator_exc_EnergyContractGuaranteeMember_5630" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_GuaranteeObligationsNatureDomain" xlink:label="Locator_us-gaap_GuaranteeObligationsNatureDomain_5631"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_TrustPreferredSecuritiesMember" xlink:label="Locator_exc_TrustPreferredSecuritiesMember_5632"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_GuaranteeObligationsNatureDomain_5631" xlink:to="Locator_exc_TrustPreferredSecuritiesMember_5632" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_GuaranteeObligationsNatureDomain" xlink:label="Locator_us-gaap_GuaranteeObligationsNatureDomain_5633"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_IndemnificationGuaranteeMember" xlink:label="Locator_us-gaap_IndemnificationGuaranteeMember_5634"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_GuaranteeObligationsNatureDomain_5633" xlink:to="Locator_us-gaap_IndemnificationGuaranteeMember_5634" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_GuaranteeObligationsNatureDomain" xlink:label="Locator_us-gaap_GuaranteeObligationsNatureDomain_5637"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_TegAndTepGuaranteeMember" xlink:label="Locator_exc_TegAndTepGuaranteeMember_5638"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_GuaranteeObligationsNatureDomain_5637" xlink:to="Locator_exc_TegAndTepGuaranteeMember_5638" order="8.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_GuaranteeObligationsNatureDomain" xlink:label="Locator_us-gaap_GuaranteeObligationsNatureDomain_5639"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NuclearInsurancePremiumsMember" xlink:label="Locator_exc_NuclearInsurancePremiumsMember_5640"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_GuaranteeObligationsNatureDomain_5639" xlink:to="Locator_exc_NuclearInsurancePremiumsMember_5640" order="9.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_GuaranteeObligationsNatureDomain" xlink:label="Locator_us-gaap_GuaranteeObligationsNatureDomain_5641"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_GuaranteesOtherThanLettersOfCreditAndNuclearInsurancePremiumsMember" xlink:label="Locator_exc_GuaranteesOtherThanLettersOfCreditAndNuclearInsurancePremiumsMember_5642"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_GuaranteeObligationsNatureDomain_5641" xlink:to="Locator_exc_GuaranteesOtherThanLettersOfCreditAndNuclearInsurancePremiumsMember_5642" order="10.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_GuaranteeObligationsNatureDomain" xlink:label="Locator_us-gaap_GuaranteeObligationsNatureDomain_5635"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SitheGuaranteeMember" xlink:label="Locator_exc_SitheGuaranteeMember_5636"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_GuaranteeObligationsNatureDomain_5635" xlink:to="Locator_exc_SitheGuaranteeMember_5636" order="7.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CapitalLeasesNetInvestmentInDirectFinancingLeasesAbstract" xlink:label="Locator_us-gaap_CapitalLeasesNetInvestmentInDirectFinancingLeasesAbstract_5881"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CapitalLeasesNetInvestmentInDirectFinancingLeases" xlink:label="Locator_us-gaap_CapitalLeasesNetInvestmentInDirectFinancingLeases_5882"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_CapitalLeasesNetInvestmentInDirectFinancingLeasesAbstract_5881" xlink:to="Locator_us-gaap_CapitalLeasesNetInvestmentInDirectFinancingLeases_5882" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CommitmentsAndContingenciesAdditionalNarrativeInformationLineItems" xlink:label="Locator_exc_CommitmentsAndContingenciesAdditionalNarrativeInformationLineItems_5491"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CommitmentsAndContingenciesAdditionalNarrativeInformationTable" xlink:label="Locator_exc_CommitmentsAndContingenciesAdditionalNarrativeInformationTable_5492"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="Locator_exc_CommitmentsAndContingenciesAdditionalNarrativeInformationLineItems_5491" xlink:to="Locator_exc_CommitmentsAndContingenciesAdditionalNarrativeInformationTable_5492" order="0.5" xbrldt:contextElement="segment" xbrldt:closed="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CommitmentsAndContingenciesAdditionalNarrativeInformationTable" xlink:label="Locator_exc_CommitmentsAndContingenciesAdditionalNarrativeInformationTable_5573"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_5574"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_exc_CommitmentsAndContingenciesAdditionalNarrativeInformationTable_5573" xlink:to="Locator_dei_LegalEntityAxis_5574" order="0.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CommitmentsAndContingenciesAdditionalNarrativeInformationTable" xlink:label="Locator_exc_CommitmentsAndContingenciesAdditionalNarrativeInformationTable_5575"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ChangesInCommitmentsAxis" xlink:label="Locator_exc_ChangesInCommitmentsAxis_5576"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_exc_CommitmentsAndContingenciesAdditionalNarrativeInformationTable_5575" xlink:to="Locator_exc_ChangesInCommitmentsAxis_5576" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ChangesInCommitmentsAxis" xlink:label="Locator_exc_ChangesInCommitmentsAxis_5241"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FiveYearDisclosureDomain" xlink:label="Locator_us-gaap_FiveYearDisclosureDomain_5242"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="Locator_exc_ChangesInCommitmentsAxis_5241" xlink:to="Locator_us-gaap_FiveYearDisclosureDomain_5242" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ChangesInCommitmentsAxis" xlink:label="Locator_exc_ChangesInCommitmentsAxis_5671"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FiveYearDisclosureDomain" xlink:label="Locator_us-gaap_FiveYearDisclosureDomain_5672"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_exc_ChangesInCommitmentsAxis_5671" xlink:to="Locator_us-gaap_FiveYearDisclosureDomain_5672" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CommitmentsAndContingenciesAdditionalNarrativeInformationTable" xlink:label="Locator_exc_CommitmentsAndContingenciesAdditionalNarrativeInformationTable_5577"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NuclearPlantAxis" xlink:label="Locator_exc_NuclearPlantAxis_5578"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_exc_CommitmentsAndContingenciesAdditionalNarrativeInformationTable_5577" xlink:to="Locator_exc_NuclearPlantAxis_5578" order="2.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NuclearPlantAxis" xlink:label="Locator_exc_NuclearPlantAxis_5243"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NuclearPlantDomain" xlink:label="Locator_exc_NuclearPlantDomain_5244"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="Locator_exc_NuclearPlantAxis_5243" xlink:to="Locator_exc_NuclearPlantDomain_5244" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NuclearPlantAxis" xlink:label="Locator_exc_NuclearPlantAxis_5673"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NuclearPlantDomain" xlink:label="Locator_exc_NuclearPlantDomain_5674"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_exc_NuclearPlantAxis_5673" xlink:to="Locator_exc_NuclearPlantDomain_5674" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NuclearPlantDomain" xlink:label="Locator_exc_NuclearPlantDomain_5675"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OysterCreekGeneratingStationMember" xlink:label="Locator_exc_OysterCreekGeneratingStationMember_5676"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_NuclearPlantDomain_5675" xlink:to="Locator_exc_OysterCreekGeneratingStationMember_5676" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NuclearPlantDomain" xlink:label="Locator_exc_NuclearPlantDomain_5677"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SalemGeneratingStationMember" xlink:label="Locator_exc_SalemGeneratingStationMember_5678"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_NuclearPlantDomain_5677" xlink:to="Locator_exc_SalemGeneratingStationMember_5678" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CommitmentsAndContingenciesAdditionalNarrativeInformationLineItems" xlink:label="Locator_exc_CommitmentsAndContingenciesAdditionalNarrativeInformationLineItems_5919"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AsbestosLossContingencyAbstract" xlink:label="Locator_exc_AsbestosLossContingencyAbstract_5920"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_CommitmentsAndContingenciesAdditionalNarrativeInformationLineItems_5919" xlink:to="Locator_exc_AsbestosLossContingencyAbstract_5920" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AsbestosLossContingencyAbstract" xlink:label="Locator_exc_AsbestosLossContingencyAbstract_5921"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AsbestosLossContingencyAccrualAtCarryingValue" xlink:label="Locator_exc_AsbestosLossContingencyAccrualAtCarryingValue_5922"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_AsbestosLossContingencyAbstract_5921" xlink:to="Locator_exc_AsbestosLossContingencyAccrualAtCarryingValue_5922" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AsbestosLossContingencyAbstract" xlink:label="Locator_exc_AsbestosLossContingencyAbstract_5923"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AsbestosLossContingencyAccrualAtCarryingValueRelatedToOpenClaims" xlink:label="Locator_exc_AsbestosLossContingencyAccrualAtCarryingValueRelatedToOpenClaims_5924"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_AsbestosLossContingencyAbstract_5923" xlink:to="Locator_exc_AsbestosLossContingencyAccrualAtCarryingValueRelatedToOpenClaims_5924" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AsbestosLossContingencyAbstract" xlink:label="Locator_exc_AsbestosLossContingencyAbstract_5925"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OpenAsbestosRelatedPersonalInjuryClaims" xlink:label="Locator_exc_OpenAsbestosRelatedPersonalInjuryClaims_5926"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_AsbestosLossContingencyAbstract_5925" xlink:to="Locator_exc_OpenAsbestosRelatedPersonalInjuryClaims_5926" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AsbestosLossContingencyAbstract" xlink:label="Locator_exc_AsbestosLossContingencyAbstract_5927"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AsbestosLossContingencyAccrualAtCarryingValueRelatedToAnticipatedClaims" xlink:label="Locator_exc_AsbestosLossContingencyAccrualAtCarryingValueRelatedToAnticipatedClaims_5928"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_AsbestosLossContingencyAbstract_5927" xlink:to="Locator_exc_AsbestosLossContingencyAccrualAtCarryingValueRelatedToAnticipatedClaims_5928" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AsbestosLossContingencyAbstract" xlink:label="Locator_exc_AsbestosLossContingencyAbstract_5929"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AsbestosLossContingencyAccrualPeriodIncreaseDecrease" xlink:label="Locator_exc_AsbestosLossContingencyAccrualPeriodIncreaseDecrease_5930"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_AsbestosLossContingencyAbstract_5929" xlink:to="Locator_exc_AsbestosLossContingencyAccrualPeriodIncreaseDecrease_5930" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AsbestosLossContingencyAbstract" xlink:label="Locator_exc_AsbestosLossContingencyAbstract_5931"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AsbestosReserveAdjustment" xlink:label="Locator_exc_AsbestosReserveAdjustment_5932"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_AsbestosLossContingencyAbstract_5931" xlink:to="Locator_exc_AsbestosReserveAdjustment_5932" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AsbestosLossContingencyAbstract" xlink:label="Locator_exc_AsbestosLossContingencyAbstract_5933"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LossContingencyPendingClaimsNumber" xlink:label="Locator_us-gaap_LossContingencyPendingClaimsNumber_5934"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_AsbestosLossContingencyAbstract_5933" xlink:to="Locator_us-gaap_LossContingencyPendingClaimsNumber_5934" order="7.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CommitmentsAndContingenciesAdditionalNarrativeInformationLineItems" xlink:label="Locator_exc_CommitmentsAndContingenciesAdditionalNarrativeInformationLineItems_5935"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_UsDepartmentOfEnergySettlementsAbstract" xlink:label="Locator_exc_UsDepartmentOfEnergySettlementsAbstract_5936"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_CommitmentsAndContingenciesAdditionalNarrativeInformationLineItems_5935" xlink:to="Locator_exc_UsDepartmentOfEnergySettlementsAbstract_5936" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_UsDepartmentOfEnergySettlementsAbstract" xlink:label="Locator_exc_UsDepartmentOfEnergySettlementsAbstract_5937"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PreacquisitionContingencyAssetDoeSettlementGain" xlink:label="Locator_exc_PreacquisitionContingencyAssetDoeSettlementGain_5938"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_UsDepartmentOfEnergySettlementsAbstract_5937" xlink:to="Locator_exc_PreacquisitionContingencyAssetDoeSettlementGain_5938" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CommitmentsAndContingenciesAdditionalNarrativeInformationLineItems" xlink:label="Locator_exc_CommitmentsAndContingenciesAdditionalNarrativeInformationLineItems_5939"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FercSettlementAbstract" xlink:label="Locator_exc_FercSettlementAbstract_5940"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_CommitmentsAndContingenciesAdditionalNarrativeInformationLineItems_5939" xlink:to="Locator_exc_FercSettlementAbstract_5940" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FercSettlementAbstract" xlink:label="Locator_exc_FercSettlementAbstract_5941"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CivilPenaltyUnderFercSettlement" xlink:label="Locator_exc_CivilPenaltyUnderFercSettlement_5942"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FercSettlementAbstract_5941" xlink:to="Locator_exc_CivilPenaltyUnderFercSettlement_5942" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FercSettlementAbstract" xlink:label="Locator_exc_FercSettlementAbstract_5943"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FercDisgorgement" xlink:label="Locator_exc_FercDisgorgement_5944"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FercSettlementAbstract_5943" xlink:to="Locator_exc_FercDisgorgement_5944" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FercSettlementAbstract" xlink:label="Locator_exc_FercSettlementAbstract_5945"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FercDisgorgementPortionToSixRegionalGridOperators" xlink:label="Locator_exc_FercDisgorgementPortionToSixRegionalGridOperators_5946"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FercSettlementAbstract_5945" xlink:to="Locator_exc_FercDisgorgementPortionToSixRegionalGridOperators_5946" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FercSettlementAbstract" xlink:label="Locator_exc_FercSettlementAbstract_5947"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NumberOfStatesInPjm" xlink:label="Locator_exc_NumberOfStatesInPjm_5948"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FercSettlementAbstract_5947" xlink:to="Locator_exc_NumberOfStatesInPjm_5948" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FercSettlementAbstract" xlink:label="Locator_exc_FercSettlementAbstract_5949"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NumberOfGridOperatorsInNewYorkIso" xlink:label="Locator_exc_NumberOfGridOperatorsInNewYorkIso_5950"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FercSettlementAbstract_5949" xlink:to="Locator_exc_NumberOfGridOperatorsInNewYorkIso_5950" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FercSettlementAbstract" xlink:label="Locator_exc_FercSettlementAbstract_5951"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FercSettlementRecordedOperationMaintenanceExpense" xlink:label="Locator_exc_FercSettlementRecordedOperationMaintenanceExpense_5952"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FercSettlementAbstract_5951" xlink:to="Locator_exc_FercSettlementRecordedOperationMaintenanceExpense_5952" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FercSettlementAbstract" xlink:label="Locator_exc_FercSettlementAbstract_5953"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PreacquisitionContingencyFercSettlement" xlink:label="Locator_exc_PreacquisitionContingencyFercSettlement_5954"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FercSettlementAbstract_5953" xlink:to="Locator_exc_PreacquisitionContingencyFercSettlement_5954" order="7.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CommitmentsAndContingenciesAdditionalNarrativeInformationLineItems" xlink:label="Locator_exc_CommitmentsAndContingenciesAdditionalNarrativeInformationLineItems_5955"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DividendPaymentsRestrictionsAbstract" xlink:label="Locator_exc_DividendPaymentsRestrictionsAbstract_5956"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_CommitmentsAndContingenciesAdditionalNarrativeInformationLineItems_5955" xlink:to="Locator_exc_DividendPaymentsRestrictionsAbstract_5956" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DividendPaymentsRestrictionsAbstract" xlink:label="Locator_exc_DividendPaymentsRestrictionsAbstract_5957"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RetainedEarningsAndCommonStock" xlink:label="Locator_exc_RetainedEarningsAndCommonStock_5958"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_DividendPaymentsRestrictionsAbstract_5957" xlink:to="Locator_exc_RetainedEarningsAndCommonStock_5958" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DividendPaymentsRestrictionsAbstract" xlink:label="Locator_exc_DividendPaymentsRestrictionsAbstract_5959"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RatioOfCapitalToTemporaryEquity" xlink:label="Locator_exc_RatioOfCapitalToTemporaryEquity_5960"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_DividendPaymentsRestrictionsAbstract_5959" xlink:to="Locator_exc_RatioOfCapitalToTemporaryEquity_5960" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CommitmentsAndContingenciesAdditionalNarrativeInformationLineItems" xlink:label="Locator_exc_CommitmentsAndContingenciesAdditionalNarrativeInformationLineItems_5961"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ContinuousPowerInterruptionAbstract" xlink:label="Locator_exc_ContinuousPowerInterruptionAbstract_5962"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_CommitmentsAndContingenciesAdditionalNarrativeInformationLineItems_5961" xlink:to="Locator_exc_ContinuousPowerInterruptionAbstract_5962" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ContinuousPowerInterruptionAbstract" xlink:label="Locator_exc_ContinuousPowerInterruptionAbstract_5963"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_MinimumCustomersPowerInterruption" xlink:label="Locator_exc_MinimumCustomersPowerInterruption_5964"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_ContinuousPowerInterruptionAbstract_5963" xlink:to="Locator_exc_MinimumCustomersPowerInterruption_5964" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ContinuousPowerInterruptionAbstract" xlink:label="Locator_exc_ContinuousPowerInterruptionAbstract_5965"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CustomersAffectedByMajorStorms" xlink:label="Locator_exc_CustomersAffectedByMajorStorms_5966"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_ContinuousPowerInterruptionAbstract_5965" xlink:to="Locator_exc_CustomersAffectedByMajorStorms_5966" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ContinuousPowerInterruptionAbstract" xlink:label="Locator_exc_ContinuousPowerInterruptionAbstract_5967"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NumberOfCustomersWaiverNotGranted" xlink:label="Locator_exc_NumberOfCustomersWaiverNotGranted_5968"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_ContinuousPowerInterruptionAbstract_5967" xlink:to="Locator_exc_NumberOfCustomersWaiverNotGranted_5968" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OperatingLeasesFutureMinimumPaymentsDueLineItems" xlink:label="Locator_exc_OperatingLeasesFutureMinimumPaymentsDueLineItems_5285"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OperatingLeasesFutureMinimumPaymentsDueTable" xlink:label="Locator_exc_OperatingLeasesFutureMinimumPaymentsDueTable_5286"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="Locator_exc_OperatingLeasesFutureMinimumPaymentsDueLineItems_5285" xlink:to="Locator_exc_OperatingLeasesFutureMinimumPaymentsDueTable_5286" order="0.5" xbrldt:contextElement="segment" xbrldt:closed="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OperatingLeasesFutureMinimumPaymentsDueTable" xlink:label="Locator_exc_OperatingLeasesFutureMinimumPaymentsDueTable_5559"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_5560"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_exc_OperatingLeasesFutureMinimumPaymentsDueTable_5559" xlink:to="Locator_dei_LegalEntityAxis_5560" order="0.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OperatingLeasesFutureMinimumPaymentsDueTable" xlink:label="Locator_exc_OperatingLeasesFutureMinimumPaymentsDueTable_5561"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OperatingLeasesFutureMinimumPaymentsAnnualAxis" xlink:label="Locator_exc_OperatingLeasesFutureMinimumPaymentsAnnualAxis_5562"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_exc_OperatingLeasesFutureMinimumPaymentsDueTable_5561" xlink:to="Locator_exc_OperatingLeasesFutureMinimumPaymentsAnnualAxis_5562" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OperatingLeasesFutureMinimumPaymentsAnnualAxis" xlink:label="Locator_exc_OperatingLeasesFutureMinimumPaymentsAnnualAxis_5245"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FiveYearDisclosureDomain" xlink:label="Locator_us-gaap_FiveYearDisclosureDomain_5246"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="Locator_exc_OperatingLeasesFutureMinimumPaymentsAnnualAxis_5245" xlink:to="Locator_us-gaap_FiveYearDisclosureDomain_5246" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OperatingLeasesFutureMinimumPaymentsAnnualAxis" xlink:label="Locator_exc_OperatingLeasesFutureMinimumPaymentsAnnualAxis_5679"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FiveYearDisclosureDomain" xlink:label="Locator_us-gaap_FiveYearDisclosureDomain_5680"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_exc_OperatingLeasesFutureMinimumPaymentsAnnualAxis_5679" xlink:to="Locator_us-gaap_FiveYearDisclosureDomain_5680" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OperatingLeasesFutureMinimumPaymentsDueLineItems" xlink:label="Locator_exc_OperatingLeasesFutureMinimumPaymentsDueLineItems_5721"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OperatingLeasesFutureMinimumPaymentsDueTableAbstract" xlink:label="Locator_exc_OperatingLeasesFutureMinimumPaymentsDueTableAbstract_5722"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_OperatingLeasesFutureMinimumPaymentsDueLineItems_5721" xlink:to="Locator_exc_OperatingLeasesFutureMinimumPaymentsDueTableAbstract_5722" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OperatingLeasesFutureMinimumPaymentsDueTableAbstract" xlink:label="Locator_exc_OperatingLeasesFutureMinimumPaymentsDueTableAbstract_5723"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent" xlink:label="Locator_us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent_5724"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_OperatingLeasesFutureMinimumPaymentsDueTableAbstract_5723" xlink:to="Locator_us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent_5724" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OperatingLeasesFutureMinimumPaymentsDueTableAbstract" xlink:label="Locator_exc_OperatingLeasesFutureMinimumPaymentsDueTableAbstract_5725"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears" xlink:label="Locator_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears_5726"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_OperatingLeasesFutureMinimumPaymentsDueTableAbstract_5725" xlink:to="Locator_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears_5726" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OperatingLeasesFutureMinimumPaymentsDueTableAbstract" xlink:label="Locator_exc_OperatingLeasesFutureMinimumPaymentsDueTableAbstract_5727"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears" xlink:label="Locator_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears_5728"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_OperatingLeasesFutureMinimumPaymentsDueTableAbstract_5727" xlink:to="Locator_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears_5728" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OperatingLeasesFutureMinimumPaymentsDueTableAbstract" xlink:label="Locator_exc_OperatingLeasesFutureMinimumPaymentsDueTableAbstract_5729"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears" xlink:label="Locator_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears_5730"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_OperatingLeasesFutureMinimumPaymentsDueTableAbstract_5729" xlink:to="Locator_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears_5730" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OperatingLeasesFutureMinimumPaymentsDueTableAbstract" xlink:label="Locator_exc_OperatingLeasesFutureMinimumPaymentsDueTableAbstract_5731"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears" xlink:label="Locator_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears_5732"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_OperatingLeasesFutureMinimumPaymentsDueTableAbstract_5731" xlink:to="Locator_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears_5732" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OperatingLeasesFutureMinimumPaymentsDueTableAbstract" xlink:label="Locator_exc_OperatingLeasesFutureMinimumPaymentsDueTableAbstract_5733"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OperatingLeasesFutureMinimumPaymentsDueBeyondFiveYears" xlink:label="Locator_exc_OperatingLeasesFutureMinimumPaymentsDueBeyondFiveYears_5734"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_OperatingLeasesFutureMinimumPaymentsDueTableAbstract_5733" xlink:to="Locator_exc_OperatingLeasesFutureMinimumPaymentsDueBeyondFiveYears_5734" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OperatingLeasesFutureMinimumPaymentsDueTableAbstract" xlink:label="Locator_exc_OperatingLeasesFutureMinimumPaymentsDueTableAbstract_5735"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDue" xlink:label="Locator_us-gaap_OperatingLeasesFutureMinimumPaymentsDue_5736"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_OperatingLeasesFutureMinimumPaymentsDueTableAbstract_5735" xlink:to="Locator_us-gaap_OperatingLeasesFutureMinimumPaymentsDue_5736" order="7.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OperatingLeasesFutureMinimumPaymentsDueTableAbstract" xlink:label="Locator_exc_OperatingLeasesFutureMinimumPaymentsDueTableAbstract_5737"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FutureOperatingLeasePaymentsIndefinitePeriodsFootnoteAbstract" xlink:label="Locator_exc_FutureOperatingLeasePaymentsIndefinitePeriodsFootnoteAbstract_5738"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_OperatingLeasesFutureMinimumPaymentsDueTableAbstract_5737" xlink:to="Locator_exc_FutureOperatingLeasePaymentsIndefinitePeriodsFootnoteAbstract_5738" order="8.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FutureOperatingLeasePaymentsIndefinitePeriodsFootnoteAbstract" xlink:label="Locator_exc_FutureOperatingLeasePaymentsIndefinitePeriodsFootnoteAbstract_5739"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FutureOperatingLeasePaymentsIndefinitePeriodsYearOne" xlink:label="Locator_exc_FutureOperatingLeasePaymentsIndefinitePeriodsYearOne_5740"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FutureOperatingLeasePaymentsIndefinitePeriodsFootnoteAbstract_5739" xlink:to="Locator_exc_FutureOperatingLeasePaymentsIndefinitePeriodsYearOne_5740" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FutureOperatingLeasePaymentsIndefinitePeriodsFootnoteAbstract" xlink:label="Locator_exc_FutureOperatingLeasePaymentsIndefinitePeriodsFootnoteAbstract_5741"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FutureOperatingLeasePaymentsIndefinitePeriodsYearTwo" xlink:label="Locator_exc_FutureOperatingLeasePaymentsIndefinitePeriodsYearTwo_5742"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FutureOperatingLeasePaymentsIndefinitePeriodsFootnoteAbstract_5741" xlink:to="Locator_exc_FutureOperatingLeasePaymentsIndefinitePeriodsYearTwo_5742" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FutureOperatingLeasePaymentsIndefinitePeriodsFootnoteAbstract" xlink:label="Locator_exc_FutureOperatingLeasePaymentsIndefinitePeriodsFootnoteAbstract_5743"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FutureOperatingLeasePaymentsIndefinitePeriodsYearThree" xlink:label="Locator_exc_FutureOperatingLeasePaymentsIndefinitePeriodsYearThree_5744"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FutureOperatingLeasePaymentsIndefinitePeriodsFootnoteAbstract_5743" xlink:to="Locator_exc_FutureOperatingLeasePaymentsIndefinitePeriodsYearThree_5744" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FutureOperatingLeasePaymentsIndefinitePeriodsFootnoteAbstract" xlink:label="Locator_exc_FutureOperatingLeasePaymentsIndefinitePeriodsFootnoteAbstract_5745"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FutureOperatingLeasePaymentsIndefinitePeriodsYearFour" xlink:label="Locator_exc_FutureOperatingLeasePaymentsIndefinitePeriodsYearFour_5746"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FutureOperatingLeasePaymentsIndefinitePeriodsFootnoteAbstract_5745" xlink:to="Locator_exc_FutureOperatingLeasePaymentsIndefinitePeriodsYearFour_5746" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FutureOperatingLeasePaymentsIndefinitePeriodsFootnoteAbstract" xlink:label="Locator_exc_FutureOperatingLeasePaymentsIndefinitePeriodsFootnoteAbstract_5747"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FutureOperatingLeasePaymentsIndefinitePeriodsYearFive" xlink:label="Locator_exc_FutureOperatingLeasePaymentsIndefinitePeriodsYearFive_5748"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FutureOperatingLeasePaymentsIndefinitePeriodsFootnoteAbstract_5747" xlink:to="Locator_exc_FutureOperatingLeasePaymentsIndefinitePeriodsYearFive_5748" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OperatingLeasesFutureMinimumPaymentsDueLineItems" xlink:label="Locator_exc_OperatingLeasesFutureMinimumPaymentsDueLineItems_5749"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OperatingLeasesRentExpenseAbstract" xlink:label="Locator_us-gaap_OperatingLeasesRentExpenseAbstract_5750"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_OperatingLeasesFutureMinimumPaymentsDueLineItems_5749" xlink:to="Locator_us-gaap_OperatingLeasesRentExpenseAbstract_5750" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OperatingLeasesRentExpenseAbstract" xlink:label="Locator_us-gaap_OperatingLeasesRentExpenseAbstract_5751"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LeaseAndRentalExpense" xlink:label="Locator_us-gaap_LeaseAndRentalExpense_5752"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_OperatingLeasesRentExpenseAbstract_5751" xlink:to="Locator_us-gaap_LeaseAndRentalExpense_5752" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OperatingLeasesRentExpenseAbstract" xlink:label="Locator_us-gaap_OperatingLeasesRentExpenseAbstract_5753"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OperatingLeasesRentExpenseFootnoteAbstract" xlink:label="Locator_exc_OperatingLeasesRentExpenseFootnoteAbstract_5754"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_OperatingLeasesRentExpenseAbstract_5753" xlink:to="Locator_exc_OperatingLeasesRentExpenseFootnoteAbstract_5754" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OperatingLeasesRentExpenseFootnoteAbstract" xlink:label="Locator_exc_OperatingLeasesRentExpenseFootnoteAbstract_5755"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_LongTermContractForPurchaseOfElectricPowerCapacity" xlink:label="Locator_exc_LongTermContractForPurchaseOfElectricPowerCapacity_5756"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_OperatingLeasesRentExpenseFootnoteAbstract_5755" xlink:to="Locator_exc_LongTermContractForPurchaseOfElectricPowerCapacity_5756" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AccrualForEnvironmentalLossContingenciesLineItems" xlink:label="Locator_exc_AccrualForEnvironmentalLossContingenciesLineItems_5407"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AccrualForEnvironmentalLossContingenciesTable" xlink:label="Locator_exc_AccrualForEnvironmentalLossContingenciesTable_5408"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="Locator_exc_AccrualForEnvironmentalLossContingenciesLineItems_5407" xlink:to="Locator_exc_AccrualForEnvironmentalLossContingenciesTable_5408" order="0.5" xbrldt:contextElement="segment" xbrldt:closed="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AccrualForEnvironmentalLossContingenciesTable" xlink:label="Locator_exc_AccrualForEnvironmentalLossContingenciesTable_5567"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_5568"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_exc_AccrualForEnvironmentalLossContingenciesTable_5567" xlink:to="Locator_dei_LegalEntityAxis_5568" order="0.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AccrualForEnvironmentalLossContingenciesTable" xlink:label="Locator_exc_AccrualForEnvironmentalLossContingenciesTable_5569"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AccrualForEnvironmentalLossContingenciesMaterialComponentsAxis" xlink:label="Locator_exc_AccrualForEnvironmentalLossContingenciesMaterialComponentsAxis_5570"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_exc_AccrualForEnvironmentalLossContingenciesTable_5569" xlink:to="Locator_exc_AccrualForEnvironmentalLossContingenciesMaterialComponentsAxis_5570" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AccrualForEnvironmentalLossContingenciesMaterialComponentsAxis" xlink:label="Locator_exc_AccrualForEnvironmentalLossContingenciesMaterialComponentsAxis_5247"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AccrualForEnvironmentalLossContingenciesMaterialComponentsDomain" xlink:label="Locator_exc_AccrualForEnvironmentalLossContingenciesMaterialComponentsDomain_5248"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="Locator_exc_AccrualForEnvironmentalLossContingenciesMaterialComponentsAxis_5247" xlink:to="Locator_exc_AccrualForEnvironmentalLossContingenciesMaterialComponentsDomain_5248" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AccrualForEnvironmentalLossContingenciesMaterialComponentsAxis" xlink:label="Locator_exc_AccrualForEnvironmentalLossContingenciesMaterialComponentsAxis_5681"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AccrualForEnvironmentalLossContingenciesMaterialComponentsDomain" xlink:label="Locator_exc_AccrualForEnvironmentalLossContingenciesMaterialComponentsDomain_5682"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_exc_AccrualForEnvironmentalLossContingenciesMaterialComponentsAxis_5681" xlink:to="Locator_exc_AccrualForEnvironmentalLossContingenciesMaterialComponentsDomain_5682" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AccrualForEnvironmentalLossContingenciesMaterialComponentsDomain" xlink:label="Locator_exc_AccrualForEnvironmentalLossContingenciesMaterialComponentsDomain_5683"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_TotalAccrualForEnvironmentalLossContingenciesMember" xlink:label="Locator_exc_TotalAccrualForEnvironmentalLossContingenciesMember_5684"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_AccrualForEnvironmentalLossContingenciesMaterialComponentsDomain_5683" xlink:to="Locator_exc_TotalAccrualForEnvironmentalLossContingenciesMember_5684" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AccrualForEnvironmentalLossContingenciesMaterialComponentsDomain" xlink:label="Locator_exc_AccrualForEnvironmentalLossContingenciesMaterialComponentsDomain_5685"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AccrualForMgpInvestigationAndRemediationMember" xlink:label="Locator_exc_AccrualForMgpInvestigationAndRemediationMember_5686"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_AccrualForEnvironmentalLossContingenciesMaterialComponentsDomain_5685" xlink:to="Locator_exc_AccrualForMgpInvestigationAndRemediationMember_5686" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AccrualForEnvironmentalLossContingenciesTable" xlink:label="Locator_exc_AccrualForEnvironmentalLossContingenciesTable_5571"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_SiteContingencyByNatureAxis" xlink:label="Locator_us-gaap_SiteContingencyByNatureAxis_5572"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_exc_AccrualForEnvironmentalLossContingenciesTable_5571" xlink:to="Locator_us-gaap_SiteContingencyByNatureAxis_5572" order="2.0"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_SiteContingencyByNatureAxis" xlink:label="Locator_us-gaap_SiteContingencyByNatureAxis_5249"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_SiteContingencyNatureOfContingencyDomain" xlink:label="Locator_us-gaap_SiteContingencyNatureOfContingencyDomain_5250"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="Locator_us-gaap_SiteContingencyByNatureAxis_5249" xlink:to="Locator_us-gaap_SiteContingencyNatureOfContingencyDomain_5250" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_SiteContingencyByNatureAxis" xlink:label="Locator_us-gaap_SiteContingencyByNatureAxis_5687"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_SiteContingencyNatureOfContingencyDomain" xlink:label="Locator_us-gaap_SiteContingencyNatureOfContingencyDomain_5688"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_us-gaap_SiteContingencyByNatureAxis_5687" xlink:to="Locator_us-gaap_SiteContingencyNatureOfContingencyDomain_5688" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_SiteContingencyNatureOfContingencyDomain" xlink:label="Locator_us-gaap_SiteContingencyNatureOfContingencyDomain_5689"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CotterCorporationMember" xlink:label="Locator_exc_CotterCorporationMember_5690"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_SiteContingencyNatureOfContingencyDomain_5689" xlink:to="Locator_exc_CotterCorporationMember_5690" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_SiteContingencyNatureOfContingencyDomain" xlink:label="Locator_us-gaap_SiteContingencyNatureOfContingencyDomain_5691"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SixtyEighthStreetDumpMember" xlink:label="Locator_exc_SixtyEighthStreetDumpMember_5692"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_SiteContingencyNatureOfContingencyDomain_5691" xlink:to="Locator_exc_SixtyEighthStreetDumpMember_5692" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_SiteContingencyNatureOfContingencyDomain" xlink:label="Locator_us-gaap_SiteContingencyNatureOfContingencyDomain_5693"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SauerDumpMember" xlink:label="Locator_exc_SauerDumpMember_5694"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_SiteContingencyNatureOfContingencyDomain_5693" xlink:to="Locator_exc_SauerDumpMember_5694" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_SiteContingencyNatureOfContingencyDomain" xlink:label="Locator_us-gaap_SiteContingencyNatureOfContingencyDomain_5695"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ClimateChangeRegulationMember" xlink:label="Locator_exc_ClimateChangeRegulationMember_5696"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_SiteContingencyNatureOfContingencyDomain_5695" xlink:to="Locator_exc_ClimateChangeRegulationMember_5696" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AccrualForEnvironmentalLossContingenciesLineItems" xlink:label="Locator_exc_AccrualForEnvironmentalLossContingenciesLineItems_5835"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AccrualForEnvironmentalLossContingencies" xlink:label="Locator_us-gaap_AccrualForEnvironmentalLossContingencies_5836"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_AccrualForEnvironmentalLossContingenciesLineItems_5835" xlink:to="Locator_us-gaap_AccrualForEnvironmentalLossContingencies_5836" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AccrualForEnvironmentalLossContingenciesLineItems" xlink:label="Locator_exc_AccrualForEnvironmentalLossContingenciesLineItems_5837"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_MgpSiteContingencyAbstract" xlink:label="Locator_exc_MgpSiteContingencyAbstract_5838"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_AccrualForEnvironmentalLossContingenciesLineItems_5837" xlink:to="Locator_exc_MgpSiteContingencyAbstract_5838" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_MgpSiteContingencyAbstract" xlink:label="Locator_exc_MgpSiteContingencyAbstract_5839"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_MgpSiteContingencyCount" xlink:label="Locator_exc_MgpSiteContingencyCount_5840"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_MgpSiteContingencyAbstract_5839" xlink:to="Locator_exc_MgpSiteContingencyCount_5840" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_MgpSiteContingencyAbstract" xlink:label="Locator_exc_MgpSiteContingencyAbstract_5841"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_MgpSiteContingencyApprovedCleanupCount" xlink:label="Locator_exc_MgpSiteContingencyApprovedCleanupCount_5842"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_MgpSiteContingencyAbstract_5841" xlink:to="Locator_exc_MgpSiteContingencyApprovedCleanupCount_5842" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_MgpSiteContingencyAbstract" xlink:label="Locator_exc_MgpSiteContingencyAbstract_5843"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_MgpSiteContingencyMonitoringCount" xlink:label="Locator_exc_MgpSiteContingencyMonitoringCount_5844"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_MgpSiteContingencyAbstract_5843" xlink:to="Locator_exc_MgpSiteContingencyMonitoringCount_5844" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_MgpSiteContingencyAbstract" xlink:label="Locator_exc_MgpSiteContingencyAbstract_5845"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SharedMgpSiteContingencyCount" xlink:label="Locator_exc_SharedMgpSiteContingencyCount_5846"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_MgpSiteContingencyAbstract_5845" xlink:to="Locator_exc_SharedMgpSiteContingencyCount_5846" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_MgpSiteContingencyAbstract" xlink:label="Locator_exc_MgpSiteContingencyAbstract_5847"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_MgpSiteContingencyReservePeriodIncreaseDecrease" xlink:label="Locator_exc_MgpSiteContingencyReservePeriodIncreaseDecrease_5848"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_MgpSiteContingencyAbstract_5847" xlink:to="Locator_exc_MgpSiteContingencyReservePeriodIncreaseDecrease_5848" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_MgpSiteContingencyAbstract" xlink:label="Locator_exc_MgpSiteContingencyAbstract_5849"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NumberOfSitesRelatedToPortionOfMgpSiteContingencyReservePeriodIncreaseDecrease" xlink:label="Locator_exc_NumberOfSitesRelatedToPortionOfMgpSiteContingencyReservePeriodIncreaseDecrease_5850"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_MgpSiteContingencyAbstract_5849" xlink:to="Locator_exc_NumberOfSitesRelatedToPortionOfMgpSiteContingencyReservePeriodIncreaseDecrease_5850" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_MgpSiteContingencyAbstract" xlink:label="Locator_exc_MgpSiteContingencyAbstract_5851"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PortionOfMgpSiteContingencyReservePeriodIncreaseDecrease" xlink:label="Locator_exc_PortionOfMgpSiteContingencyReservePeriodIncreaseDecrease_5852"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_MgpSiteContingencyAbstract_5851" xlink:to="Locator_exc_PortionOfMgpSiteContingencyReservePeriodIncreaseDecrease_5852" order="7.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AccrualForEnvironmentalLossContingenciesLineItems" xlink:label="Locator_exc_AccrualForEnvironmentalLossContingenciesLineItems_5853"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EnvironmentalIssuesWaterAbstract" xlink:label="Locator_exc_EnvironmentalIssuesWaterAbstract_5854"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_AccrualForEnvironmentalLossContingenciesLineItems_5853" xlink:to="Locator_exc_EnvironmentalIssuesWaterAbstract_5854" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EnvironmentalIssuesWaterAbstract" xlink:label="Locator_exc_EnvironmentalIssuesWaterAbstract_5855"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EmployeeRetentionExpense" xlink:label="Locator_exc_EmployeeRetentionExpense_5856"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_EnvironmentalIssuesWaterAbstract_5855" xlink:to="Locator_exc_EmployeeRetentionExpense_5856" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EnvironmentalIssuesWaterAbstract" xlink:label="Locator_exc_EnvironmentalIssuesWaterAbstract_5857"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_SiteContingencyLossExposureNotAccruedLowEstimate" xlink:label="Locator_us-gaap_SiteContingencyLossExposureNotAccruedLowEstimate_5858"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_EnvironmentalIssuesWaterAbstract_5857" xlink:to="Locator_us-gaap_SiteContingencyLossExposureNotAccruedLowEstimate_5858" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EnvironmentalIssuesWaterAbstract" xlink:label="Locator_exc_EnvironmentalIssuesWaterAbstract_5859"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ConsentDecreePenalty" xlink:label="Locator_exc_ConsentDecreePenalty_5860"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_EnvironmentalIssuesWaterAbstract_5859" xlink:to="Locator_exc_ConsentDecreePenalty_5860" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EnvironmentalIssuesWaterAbstract" xlink:label="Locator_exc_EnvironmentalIssuesWaterAbstract_5861"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AccrualForEnvironmentalLossContingenciesComponentAmount" xlink:label="Locator_us-gaap_AccrualForEnvironmentalLossContingenciesComponentAmount_5862"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_EnvironmentalIssuesWaterAbstract_5861" xlink:to="Locator_us-gaap_AccrualForEnvironmentalLossContingenciesComponentAmount_5862" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EnvironmentalIssuesWaterAbstract" xlink:label="Locator_exc_EnvironmentalIssuesWaterAbstract_5863"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AccrualForEnvironmentalLossContingenciesPaymentsSinceInception" xlink:label="Locator_exc_AccrualForEnvironmentalLossContingenciesPaymentsSinceInception_5864"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_EnvironmentalIssuesWaterAbstract_5863" xlink:to="Locator_exc_AccrualForEnvironmentalLossContingenciesPaymentsSinceInception_5864" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EnvironmentalIssuesWaterAbstract" xlink:label="Locator_exc_EnvironmentalIssuesWaterAbstract_5865"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_TotalSharedGainLossRelatedToEnvironmentalLitigationSettlement" xlink:label="Locator_exc_TotalSharedGainLossRelatedToEnvironmentalLitigationSettlement_5866"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_EnvironmentalIssuesWaterAbstract_5865" xlink:to="Locator_exc_TotalSharedGainLossRelatedToEnvironmentalLitigationSettlement_5866" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EnvironmentalIssuesWaterAbstract" xlink:label="Locator_exc_EnvironmentalIssuesWaterAbstract_5867"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_GainLossRelatedToEnvironmentalLitigationSettlement" xlink:label="Locator_exc_GainLossRelatedToEnvironmentalLitigationSettlement_5868"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_EnvironmentalIssuesWaterAbstract_5867" xlink:to="Locator_exc_GainLossRelatedToEnvironmentalLitigationSettlement_5868" order="7.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EnvironmentalIssuesWaterAbstract" xlink:label="Locator_exc_EnvironmentalIssuesWaterAbstract_5869"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ExpectedEconomicUsefulLifeReduction" xlink:label="Locator_exc_ExpectedEconomicUsefulLifeReduction_5870"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_EnvironmentalIssuesWaterAbstract_5869" xlink:to="Locator_exc_ExpectedEconomicUsefulLifeReduction_5870" order="8.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AccrualForEnvironmentalLossContingenciesLineItems" xlink:label="Locator_exc_AccrualForEnvironmentalLossContingenciesLineItems_5871"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EnvironmentalIssuesAirAbstract" xlink:label="Locator_exc_EnvironmentalIssuesAirAbstract_5872"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_AccrualForEnvironmentalLossContingenciesLineItems_5871" xlink:to="Locator_exc_EnvironmentalIssuesAirAbstract_5872" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EnvironmentalIssuesAirAbstract" xlink:label="Locator_exc_EnvironmentalIssuesAirAbstract_5873"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_StatesSubjectToCrossStateAirPollutionRule" xlink:label="Locator_exc_StatesSubjectToCrossStateAirPollutionRule_5874"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_EnvironmentalIssuesAirAbstract_5873" xlink:to="Locator_exc_StatesSubjectToCrossStateAirPollutionRule_5874" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EnvironmentalIssuesAirAbstract" xlink:label="Locator_exc_EnvironmentalIssuesAirAbstract_5875"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherAssetImpairmentCharges" xlink:label="Locator_us-gaap_OtherAssetImpairmentCharges_5876"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_EnvironmentalIssuesAirAbstract_5875" xlink:to="Locator_us-gaap_OtherAssetImpairmentCharges_5876" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EnvironmentalIssuesAirAbstract" xlink:label="Locator_exc_EnvironmentalIssuesAirAbstract_5877"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EmissionsAllowanceBalance" xlink:label="Locator_exc_EmissionsAllowanceBalance_5878"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_EnvironmentalIssuesAirAbstract_5877" xlink:to="Locator_exc_EmissionsAllowanceBalance_5878" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EnvironmentalIssuesAirAbstract" xlink:label="Locator_exc_EnvironmentalIssuesAirAbstract_5879"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CapitalLeasesNetInvestmentInDirectFinancingLeasesAbstract" xlink:label="Locator_us-gaap_CapitalLeasesNetInvestmentInDirectFinancingLeasesAbstract_5880"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_EnvironmentalIssuesAirAbstract_5879" xlink:to="Locator_us-gaap_CapitalLeasesNetInvestmentInDirectFinancingLeasesAbstract_5880" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EnvironmentalIssuesAirAbstract" xlink:label="Locator_exc_EnvironmentalIssuesAirAbstract_5883"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NumberOfStationsViolatingCleanAirAct" xlink:label="Locator_exc_NumberOfStationsViolatingCleanAirAct_5884"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_EnvironmentalIssuesAirAbstract_5883" xlink:to="Locator_exc_NumberOfStationsViolatingCleanAirAct_5884" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AccrualForEnvironmentalLossContingenciesLineItems" xlink:label="Locator_exc_AccrualForEnvironmentalLossContingenciesLineItems_5885"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EnvironmentalIssuesSolidAndHazardousWasteAbstract" xlink:label="Locator_exc_EnvironmentalIssuesSolidAndHazardousWasteAbstract_5886"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_AccrualForEnvironmentalLossContingenciesLineItems_5885" xlink:to="Locator_exc_EnvironmentalIssuesSolidAndHazardousWasteAbstract_5886" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EnvironmentalIssuesSolidAndHazardousWasteAbstract" xlink:label="Locator_exc_EnvironmentalIssuesSolidAndHazardousWasteAbstract_5887"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_EnvironmentalExitCostsReasonablyPossibleAdditionalLossesHighEstimate" xlink:label="Locator_us-gaap_EnvironmentalExitCostsReasonablyPossibleAdditionalLossesHighEstimate_5888"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_EnvironmentalIssuesSolidAndHazardousWasteAbstract_5887" xlink:to="Locator_us-gaap_EnvironmentalExitCostsReasonablyPossibleAdditionalLossesHighEstimate_5888" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EnvironmentalIssuesSolidAndHazardousWasteAbstract" xlink:label="Locator_exc_EnvironmentalIssuesSolidAndHazardousWasteAbstract_5889"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_SiteContingencyLossExposureNotAccruedBestEstimate" xlink:label="Locator_us-gaap_SiteContingencyLossExposureNotAccruedBestEstimate_5890"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_EnvironmentalIssuesSolidAndHazardousWasteAbstract_5889" xlink:to="Locator_us-gaap_SiteContingencyLossExposureNotAccruedBestEstimate_5890" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EnvironmentalIssuesSolidAndHazardousWasteAbstract" xlink:label="Locator_exc_EnvironmentalIssuesSolidAndHazardousWasteAbstract_5891"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_LossContingencyNumberOfDefendants" xlink:label="Locator_exc_LossContingencyNumberOfDefendants_5892"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_EnvironmentalIssuesSolidAndHazardousWasteAbstract_5891" xlink:to="Locator_exc_LossContingencyNumberOfDefendants_5892" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EnvironmentalIssuesSolidAndHazardousWasteAbstract" xlink:label="Locator_exc_EnvironmentalIssuesSolidAndHazardousWasteAbstract_5893"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_LossContingencyNumberOfPartiesJointlyAndSeverallyLiableInEnvironmentalProtectionAgencyAction" xlink:label="Locator_exc_LossContingencyNumberOfPartiesJointlyAndSeverallyLiableInEnvironmentalProtectionAgencyAction_5894"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_EnvironmentalIssuesSolidAndHazardousWasteAbstract_5893" xlink:to="Locator_exc_LossContingencyNumberOfPartiesJointlyAndSeverallyLiableInEnvironmentalProtectionAgencyAction_5894" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EnvironmentalIssuesSolidAndHazardousWasteAbstract" xlink:label="Locator_exc_EnvironmentalIssuesSolidAndHazardousWasteAbstract_5895"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SuperfundNationalPropertiesListAbstract" xlink:label="Locator_exc_SuperfundNationalPropertiesListAbstract_5896"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_EnvironmentalIssuesSolidAndHazardousWasteAbstract_5895" xlink:to="Locator_exc_SuperfundNationalPropertiesListAbstract_5896" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SuperfundNationalPropertiesListAbstract" xlink:label="Locator_exc_SuperfundNationalPropertiesListAbstract_5897"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AdditionalDefendantsNumber" xlink:label="Locator_exc_AdditionalDefendantsNumber_5898"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_SuperfundNationalPropertiesListAbstract_5897" xlink:to="Locator_exc_AdditionalDefendantsNumber_5898" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SuperfundNationalPropertiesListAbstract" xlink:label="Locator_exc_SuperfundNationalPropertiesListAbstract_5899"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LossContingencyRangeOfPossibleLossMinimum" xlink:label="Locator_us-gaap_LossContingencyRangeOfPossibleLossMinimum_5900"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_SuperfundNationalPropertiesListAbstract_5899" xlink:to="Locator_us-gaap_LossContingencyRangeOfPossibleLossMinimum_5900" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SuperfundNationalPropertiesListAbstract" xlink:label="Locator_exc_SuperfundNationalPropertiesListAbstract_5901"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LossContingencyRangeOfPossibleLossMaximum" xlink:label="Locator_us-gaap_LossContingencyRangeOfPossibleLossMaximum_5902"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_SuperfundNationalPropertiesListAbstract_5901" xlink:to="Locator_us-gaap_LossContingencyRangeOfPossibleLossMaximum_5902" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EnvironmentalIssuesSolidAndHazardousWasteAbstract" xlink:label="Locator_exc_EnvironmentalIssuesSolidAndHazardousWasteAbstract_5903"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_GhgEmissionsRegulationAbstract" xlink:label="Locator_exc_GhgEmissionsRegulationAbstract_5904"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_EnvironmentalIssuesSolidAndHazardousWasteAbstract_5903" xlink:to="Locator_exc_GhgEmissionsRegulationAbstract_5904" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_GhgEmissionsRegulationAbstract" xlink:label="Locator_exc_GhgEmissionsRegulationAbstract_5905"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_MinimumGhgEmissionsRequiredForEligibilityForStationarySourcePermitting" xlink:label="Locator_exc_MinimumGhgEmissionsRequiredForEligibilityForStationarySourcePermitting_5906"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_GhgEmissionsRegulationAbstract_5905" xlink:to="Locator_exc_MinimumGhgEmissionsRequiredForEligibilityForStationarySourcePermitting_5906" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_GhgEmissionsRegulationAbstract" xlink:label="Locator_exc_GhgEmissionsRegulationAbstract_5907"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_MinimumAdditionalGhgEmissionsRequiredForEligibilityForStationarySourcePermittingAfterModifications" xlink:label="Locator_exc_MinimumAdditionalGhgEmissionsRequiredForEligibilityForStationarySourcePermittingAfterModifications_5908"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_GhgEmissionsRegulationAbstract_5907" xlink:to="Locator_exc_MinimumAdditionalGhgEmissionsRequiredForEligibilityForStationarySourcePermittingAfterModifications_5908" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_GhgEmissionsRegulationAbstract" xlink:label="Locator_exc_GhgEmissionsRegulationAbstract_5909"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_MinimumWattageSubjectToNewSourcePerformanceStandards" xlink:label="Locator_exc_MinimumWattageSubjectToNewSourcePerformanceStandards_5910"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_GhgEmissionsRegulationAbstract_5909" xlink:to="Locator_exc_MinimumWattageSubjectToNewSourcePerformanceStandards_5910" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_GhgEmissionsRegulationAbstract" xlink:label="Locator_exc_GhgEmissionsRegulationAbstract_5911"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EffectiveNumberOfYearsForTailoringRule" xlink:label="Locator_exc_EffectiveNumberOfYearsForTailoringRule_5912"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_GhgEmissionsRegulationAbstract_5911" xlink:to="Locator_exc_EffectiveNumberOfYearsForTailoringRule_5912" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_GhgEmissionsRegulationAbstract" xlink:label="Locator_exc_GhgEmissionsRegulationAbstract_5913"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NewSourcePerformanceStandardsEmissionsLimit" xlink:label="Locator_exc_NewSourcePerformanceStandardsEmissionsLimit_5914"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_GhgEmissionsRegulationAbstract_5913" xlink:to="Locator_exc_NewSourcePerformanceStandardsEmissionsLimit_5914" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_GhgEmissionsRegulationAbstract" xlink:label="Locator_exc_GhgEmissionsRegulationAbstract_5915"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NewSourcePerformanceStandardEmissionsLimitFirstTenYears" xlink:label="Locator_exc_NewSourcePerformanceStandardEmissionsLimitFirstTenYears_5916"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_GhgEmissionsRegulationAbstract_5915" xlink:to="Locator_exc_NewSourcePerformanceStandardEmissionsLimitFirstTenYears_5916" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_GhgEmissionsRegulationAbstract" xlink:label="Locator_exc_GhgEmissionsRegulationAbstract_5917"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NewSourcePerformanceStandardEmissionsLimitAfterTenYears" xlink:label="Locator_exc_NewSourcePerformanceStandardEmissionsLimitAfterTenYears_5918"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_GhgEmissionsRegulationAbstract_5917" xlink:to="Locator_exc_NewSourcePerformanceStandardEmissionsLimitAfterTenYears_5918" order="7.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_GuaranteeObligationsLineItems" xlink:label="Locator_us-gaap_GuaranteeObligationsLineItems_5331"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScheduleOfGuaranteeObligationsTable" xlink:label="Locator_us-gaap_ScheduleOfGuaranteeObligationsTable_5332"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="Locator_us-gaap_GuaranteeObligationsLineItems_5331" xlink:to="Locator_us-gaap_ScheduleOfGuaranteeObligationsTable_5332" order="0.5" xbrldt:contextElement="segment" xbrldt:closed="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScheduleOfGuaranteeObligationsTable" xlink:label="Locator_us-gaap_ScheduleOfGuaranteeObligationsTable_5563"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_5564"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_us-gaap_ScheduleOfGuaranteeObligationsTable_5563" xlink:to="Locator_dei_LegalEntityAxis_5564" order="0.0"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScheduleOfGuaranteeObligationsTable" xlink:label="Locator_us-gaap_ScheduleOfGuaranteeObligationsTable_5565"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_GuaranteeObligationsByNatureAxis" xlink:label="Locator_us-gaap_GuaranteeObligationsByNatureAxis_5566"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_us-gaap_ScheduleOfGuaranteeObligationsTable_5565" xlink:to="Locator_us-gaap_GuaranteeObligationsByNatureAxis_5566" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_GuaranteeObligationsLineItems" xlink:label="Locator_us-gaap_GuaranteeObligationsLineItems_5757"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CommercialCommitmentsAbstract" xlink:label="Locator_exc_CommercialCommitmentsAbstract_5758"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_GuaranteeObligationsLineItems_5757" xlink:to="Locator_exc_CommercialCommitmentsAbstract_5758" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CommercialCommitmentsAbstract" xlink:label="Locator_exc_CommercialCommitmentsAbstract_5759"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_GuaranteeObligationsMaximumExposure" xlink:label="Locator_us-gaap_GuaranteeObligationsMaximumExposure_5760"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_CommercialCommitmentsAbstract_5759" xlink:to="Locator_us-gaap_GuaranteeObligationsMaximumExposure_5760" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_GuaranteeObligationsLineItems" xlink:label="Locator_us-gaap_GuaranteeObligationsLineItems_5761"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CommercialCommitmentsFootnoteAbstract" xlink:label="Locator_exc_CommercialCommitmentsFootnoteAbstract_5762"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_GuaranteeObligationsLineItems_5761" xlink:to="Locator_exc_CommercialCommitmentsFootnoteAbstract_5762" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CommercialCommitmentsFootnoteAbstract" xlink:label="Locator_exc_CommercialCommitmentsFootnoteAbstract_5763"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_LineOfCreditFacilityGuaranteeSupport" xlink:label="Locator_exc_LineOfCreditFacilityGuaranteeSupport_5764"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_CommercialCommitmentsFootnoteAbstract_5763" xlink:to="Locator_exc_LineOfCreditFacilityGuaranteeSupport_5764" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CommercialCommitmentsFootnoteAbstract" xlink:label="Locator_exc_CommercialCommitmentsFootnoteAbstract_5765"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_GuaranteesInSupportOfEquityInvestment" xlink:label="Locator_exc_GuaranteesInSupportOfEquityInvestment_5766"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_CommercialCommitmentsFootnoteAbstract_5765" xlink:to="Locator_exc_GuaranteesInSupportOfEquityInvestment_5766" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CommercialCommitmentsFootnoteAbstract" xlink:label="Locator_exc_CommercialCommitmentsFootnoteAbstract_5767"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EstimatedNetExposureForObligationsUnderCommercialTransactions" xlink:label="Locator_exc_EstimatedNetExposureForObligationsUnderCommercialTransactions_5768"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_CommercialCommitmentsFootnoteAbstract_5767" xlink:to="Locator_exc_EstimatedNetExposureForObligationsUnderCommercialTransactions_5768" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_GuaranteeObligationsLineItems" xlink:label="Locator_us-gaap_GuaranteeObligationsLineItems_5769"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NuclearInsuranceAbstract" xlink:label="Locator_exc_NuclearInsuranceAbstract_5770"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_GuaranteeObligationsLineItems_5769" xlink:to="Locator_exc_NuclearInsuranceAbstract_5770" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NuclearInsuranceAbstract" xlink:label="Locator_exc_NuclearInsuranceAbstract_5771"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NuclearInsuranceAnnualCoverageLimit" xlink:label="Locator_exc_NuclearInsuranceAnnualCoverageLimit_5772"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_NuclearInsuranceAbstract_5771" xlink:to="Locator_exc_NuclearInsuranceAnnualCoverageLimit_5772" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NuclearInsuranceAbstract" xlink:label="Locator_exc_NuclearInsuranceAbstract_5773"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NuclearInsuranceRequiredPerSite" xlink:label="Locator_exc_NuclearInsuranceRequiredPerSite_5774"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_NuclearInsuranceAbstract_5773" xlink:to="Locator_exc_NuclearInsuranceRequiredPerSite_5774" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NuclearInsuranceAbstract" xlink:label="Locator_exc_NuclearInsuranceAbstract_5775"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_UnitedStatesLicensedNuclearReactorsTotal" xlink:label="Locator_exc_UnitedStatesLicensedNuclearReactorsTotal_5776"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_NuclearInsuranceAbstract_5775" xlink:to="Locator_exc_UnitedStatesLicensedNuclearReactorsTotal_5776" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NuclearInsuranceAbstract" xlink:label="Locator_exc_NuclearInsuranceAbstract_5777"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NuclearInsuranceFinancialProtectionPoolValue" xlink:label="Locator_exc_NuclearInsuranceFinancialProtectionPoolValue_5778"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_NuclearInsuranceAbstract_5777" xlink:to="Locator_exc_NuclearInsuranceFinancialProtectionPoolValue_5778" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NuclearInsuranceAbstract" xlink:label="Locator_exc_NuclearInsuranceAbstract_5779"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NuclearInsuranceFinancialProtectionPoolSurchargeOnNuclearIncidentAssessment" xlink:label="Locator_exc_NuclearInsuranceFinancialProtectionPoolSurchargeOnNuclearIncidentAssessment_5780"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_NuclearInsuranceAbstract_5779" xlink:to="Locator_exc_NuclearInsuranceFinancialProtectionPoolSurchargeOnNuclearIncidentAssessment_5780" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NuclearInsuranceAbstract" xlink:label="Locator_exc_NuclearInsuranceAbstract_5781"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NuclearInsuranceFinancialProtectionPoolMaximumAssessment" xlink:label="Locator_exc_NuclearInsuranceFinancialProtectionPoolMaximumAssessment_5782"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_NuclearInsuranceAbstract_5781" xlink:to="Locator_exc_NuclearInsuranceFinancialProtectionPoolMaximumAssessment_5782" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NuclearInsuranceAbstract" xlink:label="Locator_exc_NuclearInsuranceAbstract_5783"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NuclearInsuranceFinancialProtectionPoolMaximumAnnualAssessmentPayment" xlink:label="Locator_exc_NuclearInsuranceFinancialProtectionPoolMaximumAnnualAssessmentPayment_5784"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_NuclearInsuranceAbstract_5783" xlink:to="Locator_exc_NuclearInsuranceFinancialProtectionPoolMaximumAnnualAssessmentPayment_5784" order="7.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NuclearInsuranceAbstract" xlink:label="Locator_exc_NuclearInsuranceAbstract_5785"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NuclearInsuranceFinancialProtectionPoolNuclearOperatorMaximumTotalAssessment" xlink:label="Locator_exc_NuclearInsuranceFinancialProtectionPoolNuclearOperatorMaximumTotalAssessment_5786"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_NuclearInsuranceAbstract_5785" xlink:to="Locator_exc_NuclearInsuranceFinancialProtectionPoolNuclearOperatorMaximumTotalAssessment_5786" order="8.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NuclearInsuranceAbstract" xlink:label="Locator_exc_NuclearInsuranceAbstract_5787"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_MutualPropertyInsuranceDistributionToMembers" xlink:label="Locator_exc_MutualPropertyInsuranceDistributionToMembers_5788"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_NuclearInsuranceAbstract_5787" xlink:to="Locator_exc_MutualPropertyInsuranceDistributionToMembers_5788" order="9.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NuclearInsuranceAbstract" xlink:label="Locator_exc_NuclearInsuranceAbstract_5789"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_MutualInsuranceTotalRetrospectivePremiumObligation" xlink:label="Locator_exc_MutualInsuranceTotalRetrospectivePremiumObligation_5790"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_NuclearInsuranceAbstract_5789" xlink:to="Locator_exc_MutualInsuranceTotalRetrospectivePremiumObligation_5790" order="10.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NuclearInsuranceAbstract" xlink:label="Locator_exc_NuclearInsuranceAbstract_5791"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_MutualPropertyInsuranceTotalPropertyCoverage" xlink:label="Locator_exc_MutualPropertyInsuranceTotalPropertyCoverage_5792"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_NuclearInsuranceAbstract_5791" xlink:to="Locator_exc_MutualPropertyInsuranceTotalPropertyCoverage_5792" order="11.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NuclearInsuranceAbstract" xlink:label="Locator_exc_NuclearInsuranceAbstract_5793"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_MutualPropertyInsuranceIndividualMaximumPropertyCoverageLimit" xlink:label="Locator_exc_MutualPropertyInsuranceIndividualMaximumPropertyCoverageLimit_5794"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_NuclearInsuranceAbstract_5793" xlink:to="Locator_exc_MutualPropertyInsuranceIndividualMaximumPropertyCoverageLimit_5794" order="12.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NuclearInsuranceAbstract" xlink:label="Locator_exc_NuclearInsuranceAbstract_5795"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_MutualPropertyInsuranceAdditionalBlanketPolicyPropertyCoverage" xlink:label="Locator_exc_MutualPropertyInsuranceAdditionalBlanketPolicyPropertyCoverage_5796"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_NuclearInsuranceAbstract_5795" xlink:to="Locator_exc_MutualPropertyInsuranceAdditionalBlanketPolicyPropertyCoverage_5796" order="13.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NuclearInsuranceAbstract" xlink:label="Locator_exc_NuclearInsuranceAbstract_5797"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_MutualPropertyInsuranceMaximumRetrospectivePremiumObligation" xlink:label="Locator_exc_MutualPropertyInsuranceMaximumRetrospectivePremiumObligation_5798"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_NuclearInsuranceAbstract_5797" xlink:to="Locator_exc_MutualPropertyInsuranceMaximumRetrospectivePremiumObligation_5798" order="14.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NuclearInsuranceAbstract" xlink:label="Locator_exc_NuclearInsuranceAbstract_5799"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_MutualPropertyInsuranceMaximumRecoveryLimitForMultipleLosses" xlink:label="Locator_exc_MutualPropertyInsuranceMaximumRecoveryLimitForMultipleLosses_5800"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_NuclearInsuranceAbstract_5799" xlink:to="Locator_exc_MutualPropertyInsuranceMaximumRecoveryLimitForMultipleLosses_5800" order="15.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NuclearInsuranceAbstract" xlink:label="Locator_exc_NuclearInsuranceAbstract_5801"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_MutualReplacementPowerCostInsuranceMaximumRetrospectivePremiumObligation" xlink:label="Locator_exc_MutualReplacementPowerCostInsuranceMaximumRetrospectivePremiumObligation_5802"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_NuclearInsuranceAbstract_5801" xlink:to="Locator_exc_MutualReplacementPowerCostInsuranceMaximumRetrospectivePremiumObligation_5802" order="16.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_GuaranteeObligationsLineItems" xlink:label="Locator_us-gaap_GuaranteeObligationsLineItems_5803"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SpentNuclearFuelObligationAbstract" xlink:label="Locator_exc_SpentNuclearFuelObligationAbstract_5804"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_GuaranteeObligationsLineItems_5803" xlink:to="Locator_exc_SpentNuclearFuelObligationAbstract_5804" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SpentNuclearFuelObligationAbstract" xlink:label="Locator_exc_SpentNuclearFuelObligationAbstract_5805"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CostOfSpentNuclearFuelDisposal" xlink:label="Locator_exc_CostOfSpentNuclearFuelDisposal_5806"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_SpentNuclearFuelObligationAbstract_5805" xlink:to="Locator_exc_CostOfSpentNuclearFuelDisposal_5806" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SpentNuclearFuelObligationAbstract" xlink:label="Locator_exc_SpentNuclearFuelObligationAbstract_5807"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DateOneUsedToEstimateNuclearAroIncrease" xlink:label="Locator_exc_DateOneUsedToEstimateNuclearAroIncrease_5808"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_SpentNuclearFuelObligationAbstract_5807" xlink:to="Locator_exc_DateOneUsedToEstimateNuclearAroIncrease_5808" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SpentNuclearFuelObligationAbstract" xlink:label="Locator_exc_SpentNuclearFuelObligationAbstract_5809"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DateTwoUsedToEstimateNuclearAroIncrease" xlink:label="Locator_exc_DateTwoUsedToEstimateNuclearAroIncrease_5810"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_SpentNuclearFuelObligationAbstract_5809" xlink:to="Locator_exc_DateTwoUsedToEstimateNuclearAroIncrease_5810" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SpentNuclearFuelObligationAbstract" xlink:label="Locator_exc_SpentNuclearFuelObligationAbstract_5811"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EstimatedNuclearAroIncreaseDateOne" xlink:label="Locator_exc_EstimatedNuclearAroIncreaseDateOne_5812"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_SpentNuclearFuelObligationAbstract_5811" xlink:to="Locator_exc_EstimatedNuclearAroIncreaseDateOne_5812" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SpentNuclearFuelObligationAbstract" xlink:label="Locator_exc_SpentNuclearFuelObligationAbstract_5813"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EstimatedNuclearAroIncreaseDateTwo" xlink:label="Locator_exc_EstimatedNuclearAroIncreaseDateTwo_5814"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_SpentNuclearFuelObligationAbstract_5813" xlink:to="Locator_exc_EstimatedNuclearAroIncreaseDateTwo_5814" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SpentNuclearFuelObligationAbstract" xlink:label="Locator_exc_SpentNuclearFuelObligationAbstract_5815"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SpentNuclearFuelStorageReimbursement" xlink:label="Locator_exc_SpentNuclearFuelStorageReimbursement_5816"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_SpentNuclearFuelObligationAbstract_5815" xlink:to="Locator_exc_SpentNuclearFuelStorageReimbursement_5816" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SpentNuclearFuelObligationAbstract" xlink:label="Locator_exc_SpentNuclearFuelObligationAbstract_5817"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SpentNuclearFuelStorageReimbursementNetCoOwners" xlink:label="Locator_exc_SpentNuclearFuelStorageReimbursementNetCoOwners_5818"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_SpentNuclearFuelObligationAbstract_5817" xlink:to="Locator_exc_SpentNuclearFuelStorageReimbursementNetCoOwners_5818" order="7.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SpentNuclearFuelObligationAbstract" xlink:label="Locator_exc_SpentNuclearFuelObligationAbstract_5819"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SpentNuclearFuelReimbursementRequestTotal" xlink:label="Locator_exc_SpentNuclearFuelReimbursementRequestTotal_5820"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_SpentNuclearFuelObligationAbstract_5819" xlink:to="Locator_exc_SpentNuclearFuelReimbursementRequestTotal_5820" order="8.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SpentNuclearFuelObligationAbstract" xlink:label="Locator_exc_SpentNuclearFuelObligationAbstract_5821"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SpentNuclearFuelReimbursementRequestCoOwner" xlink:label="Locator_exc_SpentNuclearFuelReimbursementRequestCoOwner_5822"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_SpentNuclearFuelObligationAbstract_5821" xlink:to="Locator_exc_SpentNuclearFuelReimbursementRequestCoOwner_5822" order="9.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SpentNuclearFuelObligationAbstract" xlink:label="Locator_exc_SpentNuclearFuelObligationAbstract_5823"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SpentNuclearFuelOneTimeFee" xlink:label="Locator_exc_SpentNuclearFuelOneTimeFee_5824"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_SpentNuclearFuelObligationAbstract_5823" xlink:to="Locator_exc_SpentNuclearFuelOneTimeFee_5824" order="10.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SpentNuclearFuelObligationAbstract" xlink:label="Locator_exc_SpentNuclearFuelObligationAbstract_5825"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SpentNuclearFuelOneTimeFeeWithInterest" xlink:label="Locator_exc_SpentNuclearFuelOneTimeFeeWithInterest_5826"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_SpentNuclearFuelObligationAbstract_5825" xlink:to="Locator_exc_SpentNuclearFuelOneTimeFeeWithInterest_5826" order="11.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SpentNuclearFuelObligationAbstract" xlink:label="Locator_exc_SpentNuclearFuelObligationAbstract_5827"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SpentNuclearFuelTreasuryInterestRate" xlink:label="Locator_exc_SpentNuclearFuelTreasuryInterestRate_5828"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_SpentNuclearFuelObligationAbstract_5827" xlink:to="Locator_exc_SpentNuclearFuelTreasuryInterestRate_5828" order="12.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_GuaranteeObligationsLineItems" xlink:label="Locator_us-gaap_GuaranteeObligationsLineItems_5829"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_GuaranteesRelatedToIndemnificationsAbstract" xlink:label="Locator_exc_GuaranteesRelatedToIndemnificationsAbstract_5830"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_GuaranteeObligationsLineItems_5829" xlink:to="Locator_exc_GuaranteesRelatedToIndemnificationsAbstract_5830" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_GuaranteesRelatedToIndemnificationsAbstract" xlink:label="Locator_exc_GuaranteesRelatedToIndemnificationsAbstract_5831"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired" xlink:label="Locator_us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired_5832"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_GuaranteesRelatedToIndemnificationsAbstract_5831" xlink:to="Locator_us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired_5832" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_GuaranteesRelatedToIndemnificationsAbstract" xlink:label="Locator_exc_GuaranteesRelatedToIndemnificationsAbstract_5833"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BusinessDivestitureInterestDivested" xlink:label="Locator_exc_BusinessDivestitureInterestDivested_5834"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_GuaranteesRelatedToIndemnificationsAbstract_5833" xlink:to="Locator_exc_BusinessDivestitureInterestDivested_5834" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_UnrecordedUnconditionalPurchaseObligationLineItems" xlink:label="Locator_us-gaap_UnrecordedUnconditionalPurchaseObligationLineItems_5265"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_UnrecordedUnconditionalPurchaseObligationTable" xlink:label="Locator_us-gaap_UnrecordedUnconditionalPurchaseObligationTable_5266"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="Locator_us-gaap_UnrecordedUnconditionalPurchaseObligationLineItems_5265" xlink:to="Locator_us-gaap_UnrecordedUnconditionalPurchaseObligationTable_5266" order="0.5" xbrldt:contextElement="segment" xbrldt:closed="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_UnrecordedUnconditionalPurchaseObligationTable" xlink:label="Locator_us-gaap_UnrecordedUnconditionalPurchaseObligationTable_5555"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_5556"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_us-gaap_UnrecordedUnconditionalPurchaseObligationTable_5555" xlink:to="Locator_dei_LegalEntityAxis_5556" order="0.0"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_UnrecordedUnconditionalPurchaseObligationTable" xlink:label="Locator_us-gaap_UnrecordedUnconditionalPurchaseObligationTable_5557"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis" xlink:label="Locator_us-gaap_UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis_5558"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_us-gaap_UnrecordedUnconditionalPurchaseObligationTable_5557" xlink:to="Locator_us-gaap_UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis_5558" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis" xlink:label="Locator_us-gaap_UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis_5239"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain" xlink:label="Locator_us-gaap_UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain_5240"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="Locator_us-gaap_UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis_5239" xlink:to="Locator_us-gaap_UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain_5240" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis" xlink:label="Locator_us-gaap_UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis_5643"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain" xlink:label="Locator_us-gaap_UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain_5644"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_us-gaap_UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis_5643" xlink:to="Locator_us-gaap_UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain_5644" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain" xlink:label="Locator_us-gaap_UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain_5645"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NetCapacityPurchasesMember" xlink:label="Locator_exc_NetCapacityPurchasesMember_5646"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain_5645" xlink:to="Locator_exc_NetCapacityPurchasesMember_5646" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain" xlink:label="Locator_us-gaap_UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain_5647"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PowerPurchasesMember" xlink:label="Locator_exc_PowerPurchasesMember_5648"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain_5647" xlink:to="Locator_exc_PowerPurchasesMember_5648" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain" xlink:label="Locator_us-gaap_UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain_5649"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_TransmissionRightsPurchasesMember" xlink:label="Locator_exc_TransmissionRightsPurchasesMember_5650"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain_5649" xlink:to="Locator_exc_TransmissionRightsPurchasesMember_5650" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain" xlink:label="Locator_us-gaap_UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain_5651"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PurchasedEnergyFromEquityInvestmentMember" xlink:label="Locator_exc_PurchasedEnergyFromEquityInvestmentMember_5652"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain_5651" xlink:to="Locator_exc_PurchasedEnergyFromEquityInvestmentMember_5652" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain" xlink:label="Locator_us-gaap_UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain_5653"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_TotalUnregulatedEnergyCommitmentsMember" xlink:label="Locator_exc_TotalUnregulatedEnergyCommitmentsMember_5654"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain_5653" xlink:to="Locator_exc_TotalUnregulatedEnergyCommitmentsMember_5654" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain" xlink:label="Locator_us-gaap_UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain_5655"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DspProgramElectricProcurementContractsMember" xlink:label="Locator_exc_DspProgramElectricProcurementContractsMember_5656"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain_5655" xlink:to="Locator_exc_DspProgramElectricProcurementContractsMember_5656" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain" xlink:label="Locator_us-gaap_UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain_5657"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RenewableEnergyIncludingRenewableEnergyCreditsMember" xlink:label="Locator_exc_RenewableEnergyIncludingRenewableEnergyCreditsMember_5658"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain_5657" xlink:to="Locator_exc_RenewableEnergyIncludingRenewableEnergyCreditsMember_5658" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain" xlink:label="Locator_us-gaap_UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain_5659"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AlternativeEnergyCreditsMember" xlink:label="Locator_exc_AlternativeEnergyCreditsMember_5660"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain_5659" xlink:to="Locator_exc_AlternativeEnergyCreditsMember_5660" order="7.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain" xlink:label="Locator_us-gaap_UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain_5661"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CurtailmentServicesMember" xlink:label="Locator_exc_CurtailmentServicesMember_5662"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain_5661" xlink:to="Locator_exc_CurtailmentServicesMember_5662" order="8.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain" xlink:label="Locator_us-gaap_UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain_5663"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PublicUtilitiesInventoryFuelMember" xlink:label="Locator_us-gaap_PublicUtilitiesInventoryFuelMember_5664"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain_5663" xlink:to="Locator_us-gaap_PublicUtilitiesInventoryFuelMember_5664" order="9.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain" xlink:label="Locator_us-gaap_UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain_5665"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SolarFacilityConstructionMember" xlink:label="Locator_exc_SolarFacilityConstructionMember_5666"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain_5665" xlink:to="Locator_exc_SolarFacilityConstructionMember_5666" order="10.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain" xlink:label="Locator_us-gaap_UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain_5667"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_WindFacilityConstructionMember" xlink:label="Locator_exc_WindFacilityConstructionMember_5668"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain_5667" xlink:to="Locator_exc_WindFacilityConstructionMember_5668" order="11.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain" xlink:label="Locator_us-gaap_UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain_5669"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OtherPurchaseObligationsMember" xlink:label="Locator_exc_OtherPurchaseObligationsMember_5670"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain_5669" xlink:to="Locator_exc_OtherPurchaseObligationsMember_5670" order="12.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_UnrecordedUnconditionalPurchaseObligationLineItems" xlink:label="Locator_us-gaap_UnrecordedUnconditionalPurchaseObligationLineItems_5697"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_UnrecordedUnconditionalPurchaseObligationAbstract" xlink:label="Locator_us-gaap_UnrecordedUnconditionalPurchaseObligationAbstract_5698"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_UnrecordedUnconditionalPurchaseObligationLineItems_5697" xlink:to="Locator_us-gaap_UnrecordedUnconditionalPurchaseObligationAbstract_5698" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_UnrecordedUnconditionalPurchaseObligationAbstract" xlink:label="Locator_us-gaap_UnrecordedUnconditionalPurchaseObligationAbstract_5699"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnFirstAnniversary" xlink:label="Locator_us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnFirstAnniversary_5700"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_UnrecordedUnconditionalPurchaseObligationAbstract_5699" xlink:to="Locator_us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnFirstAnniversary_5700" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_UnrecordedUnconditionalPurchaseObligationAbstract" xlink:label="Locator_us-gaap_UnrecordedUnconditionalPurchaseObligationAbstract_5701"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnSecondAnniversary" xlink:label="Locator_us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnSecondAnniversary_5702"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_UnrecordedUnconditionalPurchaseObligationAbstract_5701" xlink:to="Locator_us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnSecondAnniversary_5702" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_UnrecordedUnconditionalPurchaseObligationAbstract" xlink:label="Locator_us-gaap_UnrecordedUnconditionalPurchaseObligationAbstract_5703"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnThirdAnniversary" xlink:label="Locator_us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnThirdAnniversary_5704"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_UnrecordedUnconditionalPurchaseObligationAbstract_5703" xlink:to="Locator_us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnThirdAnniversary_5704" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_UnrecordedUnconditionalPurchaseObligationAbstract" xlink:label="Locator_us-gaap_UnrecordedUnconditionalPurchaseObligationAbstract_5705"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnFourthAnniversary" xlink:label="Locator_us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnFourthAnniversary_5706"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_UnrecordedUnconditionalPurchaseObligationAbstract_5705" xlink:to="Locator_us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnFourthAnniversary_5706" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_UnrecordedUnconditionalPurchaseObligationAbstract" xlink:label="Locator_us-gaap_UnrecordedUnconditionalPurchaseObligationAbstract_5707"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnFifthAnniversary" xlink:label="Locator_us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnFifthAnniversary_5708"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_UnrecordedUnconditionalPurchaseObligationAbstract_5707" xlink:to="Locator_us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnFifthAnniversary_5708" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_UnrecordedUnconditionalPurchaseObligationAbstract" xlink:label="Locator_us-gaap_UnrecordedUnconditionalPurchaseObligationAbstract_5709"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_UnrecordedUnconditionalPurchaseObligationDueAfterFiveYears" xlink:label="Locator_us-gaap_UnrecordedUnconditionalPurchaseObligationDueAfterFiveYears_5710"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_UnrecordedUnconditionalPurchaseObligationAbstract_5709" xlink:to="Locator_us-gaap_UnrecordedUnconditionalPurchaseObligationDueAfterFiveYears_5710" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_UnrecordedUnconditionalPurchaseObligationAbstract" xlink:label="Locator_us-gaap_UnrecordedUnconditionalPurchaseObligationAbstract_5711"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount" xlink:label="Locator_us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount_5712"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_UnrecordedUnconditionalPurchaseObligationAbstract_5711" xlink:to="Locator_us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount_5712" order="7.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_UnrecordedUnconditionalPurchaseObligationLineItems" xlink:label="Locator_us-gaap_UnrecordedUnconditionalPurchaseObligationLineItems_5713"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_UnrecordedUnconditionalPurchaseObligationAdditionalInformationAbstract" xlink:label="Locator_exc_UnrecordedUnconditionalPurchaseObligationAdditionalInformationAbstract_5714"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_UnrecordedUnconditionalPurchaseObligationLineItems_5713" xlink:to="Locator_exc_UnrecordedUnconditionalPurchaseObligationAdditionalInformationAbstract_5714" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_UnrecordedUnconditionalPurchaseObligationAdditionalInformationAbstract" xlink:label="Locator_exc_UnrecordedUnconditionalPurchaseObligationAdditionalInformationAbstract_5715"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_UnrecordedUnconditionalPurchaseObligationRelatedMegawatts" xlink:label="Locator_exc_UnrecordedUnconditionalPurchaseObligationRelatedMegawatts_5716"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_UnrecordedUnconditionalPurchaseObligationAdditionalInformationAbstract_5715" xlink:to="Locator_exc_UnrecordedUnconditionalPurchaseObligationRelatedMegawatts_5716" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_UnrecordedUnconditionalPurchaseObligationAdditionalInformationAbstract" xlink:label="Locator_exc_UnrecordedUnconditionalPurchaseObligationAdditionalInformationAbstract_5717"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_EquityMethodInvestmentOwnershipPercentage" xlink:label="Locator_us-gaap_EquityMethodInvestmentOwnershipPercentage_5718"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_UnrecordedUnconditionalPurchaseObligationAdditionalInformationAbstract_5717" xlink:to="Locator_us-gaap_EquityMethodInvestmentOwnershipPercentage_5718" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_UnrecordedUnconditionalPurchaseObligationAdditionalInformationAbstract" xlink:label="Locator_exc_UnrecordedUnconditionalPurchaseObligationAdditionalInformationAbstract_5719"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_UnrecordedUnconditionalPurchaseObligationRelatedMegawattsUnderConstruction" xlink:label="Locator_exc_UnrecordedUnconditionalPurchaseObligationRelatedMegawattsUnderConstruction_5720"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_UnrecordedUnconditionalPurchaseObligationAdditionalInformationAbstract_5719" xlink:to="Locator_exc_UnrecordedUnconditionalPurchaseObligationRelatedMegawattsUnderConstruction_5720" order="2.0" xbrldt:usable="true"/> |
| | </definitionLink> |
| <definitionLink xlink:type="extended" xlink:role="http://exeloncorp.com/role/DisclosureSupplementalFinancialInformationTables"> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_6147"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_6148"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_dei_LegalEntityAxis_6147" xlink:to="Locator_dei_EntityDomain_6148" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_6149"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ExelonGenerationCoLLCMember" xlink:label="Locator_exc_ExelonGenerationCoLLCMember_6150"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_6149" xlink:to="Locator_exc_ExelonGenerationCoLLCMember_6150" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_6151"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CommonwealthEdisonCoMember" xlink:label="Locator_exc_CommonwealthEdisonCoMember_6152"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_6151" xlink:to="Locator_exc_CommonwealthEdisonCoMember_6152" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_6153"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PecoEnergyCoMember" xlink:label="Locator_exc_PecoEnergyCoMember_6154"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_6153" xlink:to="Locator_exc_PecoEnergyCoMember_6154" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_6155"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BaltimoreGasAndElectricCompanyMember" xlink:label="Locator_exc_BaltimoreGasAndElectricCompanyMember_6156"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_6155" xlink:to="Locator_exc_BaltimoreGasAndElectricCompanyMember_6156" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementTable" xlink:label="Locator_us-gaap_StatementTable_6145"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_6146"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_us-gaap_StatementTable_6145" xlink:to="Locator_dei_LegalEntityAxis_6146" order="0.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SupplementalFinancialInformationTablesLineItems" xlink:label="Locator_exc_SupplementalFinancialInformationTablesLineItems_6141"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementTable" xlink:label="Locator_us-gaap_StatementTable_6142"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="Locator_exc_SupplementalFinancialInformationTablesLineItems_6141" xlink:to="Locator_us-gaap_StatementTable_6142" order="0.5" xbrldt:contextElement="segment" xbrldt:closed="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SupplementalFinancialInformationTablesLineItems" xlink:label="Locator_exc_SupplementalFinancialInformationTablesLineItems_6157"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ScheduleOfOperatingRevenuesTextBlock" xlink:label="Locator_exc_ScheduleOfOperatingRevenuesTextBlock_6158"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_SupplementalFinancialInformationTablesLineItems_6157" xlink:to="Locator_exc_ScheduleOfOperatingRevenuesTextBlock_6158" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SupplementalFinancialInformationTablesLineItems" xlink:label="Locator_exc_SupplementalFinancialInformationTablesLineItems_6159"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ScheduleOfTaxesExcludingIncomeAndExciseTaxesTextBlock" xlink:label="Locator_exc_ScheduleOfTaxesExcludingIncomeAndExciseTaxesTextBlock_6160"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_SupplementalFinancialInformationTablesLineItems_6159" xlink:to="Locator_exc_ScheduleOfTaxesExcludingIncomeAndExciseTaxesTextBlock_6160" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SupplementalFinancialInformationTablesLineItems" xlink:label="Locator_exc_SupplementalFinancialInformationTablesLineItems_6161"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScheduleOfOtherNonoperatingIncomeByComponentTextBlock" xlink:label="Locator_us-gaap_ScheduleOfOtherNonoperatingIncomeByComponentTextBlock_6162"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_SupplementalFinancialInformationTablesLineItems_6161" xlink:to="Locator_us-gaap_ScheduleOfOtherNonoperatingIncomeByComponentTextBlock_6162" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SupplementalFinancialInformationTablesLineItems" xlink:label="Locator_exc_SupplementalFinancialInformationTablesLineItems_6163"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ScheduleOfDepreciationAmortizationAccretionDisclosuresTextBlock" xlink:label="Locator_exc_ScheduleOfDepreciationAmortizationAccretionDisclosuresTextBlock_6164"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_SupplementalFinancialInformationTablesLineItems_6163" xlink:to="Locator_exc_ScheduleOfDepreciationAmortizationAccretionDisclosuresTextBlock_6164" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SupplementalFinancialInformationTablesLineItems" xlink:label="Locator_exc_SupplementalFinancialInformationTablesLineItems_6165"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CashFlowSupplementalDisclosuresTextBlock" xlink:label="Locator_us-gaap_CashFlowSupplementalDisclosuresTextBlock_6166"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_SupplementalFinancialInformationTablesLineItems_6165" xlink:to="Locator_us-gaap_CashFlowSupplementalDisclosuresTextBlock_6166" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SupplementalFinancialInformationTablesLineItems" xlink:label="Locator_exc_SupplementalFinancialInformationTablesLineItems_6167"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_SupplementalBalanceSheetDisclosuresTextBlock" xlink:label="Locator_us-gaap_SupplementalBalanceSheetDisclosuresTextBlock_6168"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_SupplementalFinancialInformationTablesLineItems_6167" xlink:to="Locator_us-gaap_SupplementalBalanceSheetDisclosuresTextBlock_6168" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SupplementalFinancialInformationTablesLineItems" xlink:label="Locator_exc_SupplementalFinancialInformationTablesLineItems_6169"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ScheduleOfInvestmentsTableTextBlock" xlink:label="Locator_exc_ScheduleOfInvestmentsTableTextBlock_6170"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_SupplementalFinancialInformationTablesLineItems_6169" xlink:to="Locator_exc_ScheduleOfInvestmentsTableTextBlock_6170" order="7.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SupplementalFinancialInformationTablesLineItems" xlink:label="Locator_exc_SupplementalFinancialInformationTablesLineItems_6171"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ScheduleOfCapitalLeasesNetInvestmentInDirectFinancingLeasesTextBlock" xlink:label="Locator_exc_ScheduleOfCapitalLeasesNetInvestmentInDirectFinancingLeasesTextBlock_6172"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_SupplementalFinancialInformationTablesLineItems_6171" xlink:to="Locator_exc_ScheduleOfCapitalLeasesNetInvestmentInDirectFinancingLeasesTextBlock_6172" order="8.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SupplementalFinancialInformationTablesLineItems" xlink:label="Locator_exc_SupplementalFinancialInformationTablesLineItems_6173"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ScheduleOfAccruedLiabilitiesCurrentTextBlock" xlink:label="Locator_exc_ScheduleOfAccruedLiabilitiesCurrentTextBlock_6174"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_SupplementalFinancialInformationTablesLineItems_6173" xlink:to="Locator_exc_ScheduleOfAccruedLiabilitiesCurrentTextBlock_6174" order="9.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SupplementalFinancialInformationTablesLineItems" xlink:label="Locator_exc_SupplementalFinancialInformationTablesLineItems_6175"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AccumulatedOtherComprehensiveIncomeNetOfTaxesTextBlock" xlink:label="Locator_exc_AccumulatedOtherComprehensiveIncomeNetOfTaxesTextBlock_6176"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_SupplementalFinancialInformationTablesLineItems_6175" xlink:to="Locator_exc_AccumulatedOtherComprehensiveIncomeNetOfTaxesTextBlock_6176" order="10.0" xbrldt:usable="true"/> |
| | </definitionLink> |
| <definitionLink xlink:type="extended" xlink:role="http://exeloncorp.com/role/DisclosureSupplementalFinancialInformationStatementOfOperationsDetails"> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_6317"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_6318"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_dei_LegalEntityAxis_6317" xlink:to="Locator_dei_EntityDomain_6318" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_6319"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ExelonGenerationCoLLCMember" xlink:label="Locator_exc_ExelonGenerationCoLLCMember_6320"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_6319" xlink:to="Locator_exc_ExelonGenerationCoLLCMember_6320" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_6321"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CommonwealthEdisonCoMember" xlink:label="Locator_exc_CommonwealthEdisonCoMember_6322"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_6321" xlink:to="Locator_exc_CommonwealthEdisonCoMember_6322" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_6323"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PecoEnergyCoMember" xlink:label="Locator_exc_PecoEnergyCoMember_6324"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_6323" xlink:to="Locator_exc_PecoEnergyCoMember_6324" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_6325"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BaltimoreGasAndElectricCompanyMember" xlink:label="Locator_exc_BaltimoreGasAndElectricCompanyMember_6326"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_6325" xlink:to="Locator_exc_BaltimoreGasAndElectricCompanyMember_6326" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SupplementalIncomeStatementInformationLineItems" xlink:label="Locator_exc_SupplementalIncomeStatementInformationLineItems_6211"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SupplementalIncomeStatementInformationTable" xlink:label="Locator_exc_SupplementalIncomeStatementInformationTable_6212"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="Locator_exc_SupplementalIncomeStatementInformationLineItems_6211" xlink:to="Locator_exc_SupplementalIncomeStatementInformationTable_6212" order="0.5" xbrldt:contextElement="segment" xbrldt:closed="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SupplementalIncomeStatementInformationTable" xlink:label="Locator_exc_SupplementalIncomeStatementInformationTable_6313"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_6314"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_exc_SupplementalIncomeStatementInformationTable_6313" xlink:to="Locator_dei_LegalEntityAxis_6314" order="0.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SupplementalIncomeStatementInformationTable" xlink:label="Locator_exc_SupplementalIncomeStatementInformationTable_6315"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis" xlink:label="Locator_us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_6316"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_exc_SupplementalIncomeStatementInformationTable_6315" xlink:to="Locator_us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_6316" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis" xlink:label="Locator_us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_6191"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_EquityMethodInvesteeNameDomain" xlink:label="Locator_us-gaap_EquityMethodInvesteeNameDomain_6192"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="Locator_us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_6191" xlink:to="Locator_us-gaap_EquityMethodInvesteeNameDomain_6192" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis" xlink:label="Locator_us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_6327"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_EquityMethodInvesteeNameDomain" xlink:label="Locator_us-gaap_EquityMethodInvesteeNameDomain_6328"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_6327" xlink:to="Locator_us-gaap_EquityMethodInvesteeNameDomain_6328" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_EquityMethodInvesteeNameDomain" xlink:label="Locator_us-gaap_EquityMethodInvesteeNameDomain_6329"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FinancingTrustsMember" xlink:label="Locator_exc_FinancingTrustsMember_6330"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_EquityMethodInvesteeNameDomain_6329" xlink:to="Locator_exc_FinancingTrustsMember_6330" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_EquityMethodInvesteeNameDomain" xlink:label="Locator_us-gaap_EquityMethodInvesteeNameDomain_6331"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NustartEnergyDevelopmentMember" xlink:label="Locator_exc_NustartEnergyDevelopmentMember_6332"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_EquityMethodInvesteeNameDomain_6331" xlink:to="Locator_exc_NustartEnergyDevelopmentMember_6332" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_EquityMethodInvesteeNameDomain" xlink:label="Locator_us-gaap_EquityMethodInvesteeNameDomain_6333"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_KeystoneFuelsMember" xlink:label="Locator_exc_KeystoneFuelsMember_6334"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_EquityMethodInvesteeNameDomain_6333" xlink:to="Locator_exc_KeystoneFuelsMember_6334" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_EquityMethodInvesteeNameDomain" xlink:label="Locator_us-gaap_EquityMethodInvesteeNameDomain_6335"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ConemaughFuelsMember" xlink:label="Locator_exc_ConemaughFuelsMember_6336"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_EquityMethodInvesteeNameDomain_6335" xlink:to="Locator_exc_ConemaughFuelsMember_6336" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_EquityMethodInvesteeNameDomain" xlink:label="Locator_us-gaap_EquityMethodInvesteeNameDomain_6337"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SacramentoSolarMember" xlink:label="Locator_exc_SacramentoSolarMember_6338"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_EquityMethodInvesteeNameDomain_6337" xlink:to="Locator_exc_SacramentoSolarMember_6338" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SupplementalIncomeStatementInformationLineItems" xlink:label="Locator_exc_SupplementalIncomeStatementInformationLineItems_6339"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RevenuesAbstract" xlink:label="Locator_us-gaap_RevenuesAbstract_6340"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_SupplementalIncomeStatementInformationLineItems_6339" xlink:to="Locator_us-gaap_RevenuesAbstract_6340" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RevenuesAbstract" xlink:label="Locator_us-gaap_RevenuesAbstract_6341"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ElectricGasUtilityRevenueWholesale" xlink:label="Locator_exc_ElectricGasUtilityRevenueWholesale_6342"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RevenuesAbstract_6341" xlink:to="Locator_exc_ElectricGasUtilityRevenueWholesale_6342" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RevenuesAbstract" xlink:label="Locator_us-gaap_RevenuesAbstract_6343"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ElectricGasUtilityRevenueRetail" xlink:label="Locator_exc_ElectricGasUtilityRevenueRetail_6344"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RevenuesAbstract_6343" xlink:to="Locator_exc_ElectricGasUtilityRevenueRetail_6344" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RevenuesAbstract" xlink:label="Locator_us-gaap_RevenuesAbstract_6345"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherSalesRevenueNet" xlink:label="Locator_us-gaap_OtherSalesRevenueNet_6346"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RevenuesAbstract_6345" xlink:to="Locator_us-gaap_OtherSalesRevenueNet_6346" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RevenuesAbstract" xlink:label="Locator_us-gaap_RevenuesAbstract_6347"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_Revenues" xlink:label="Locator_us-gaap_Revenues_6348"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RevenuesAbstract_6347" xlink:to="Locator_us-gaap_Revenues_6348" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SupplementalIncomeStatementInformationLineItems" xlink:label="Locator_exc_SupplementalIncomeStatementInformationLineItems_6349"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_TaxesExcludingIncomeAndExciseTaxesAbstract" xlink:label="Locator_us-gaap_TaxesExcludingIncomeAndExciseTaxesAbstract_6350"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_SupplementalIncomeStatementInformationLineItems_6349" xlink:to="Locator_us-gaap_TaxesExcludingIncomeAndExciseTaxesAbstract_6350" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_TaxesExcludingIncomeAndExciseTaxesAbstract" xlink:label="Locator_us-gaap_TaxesExcludingIncomeAndExciseTaxesAbstract_6351"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_UtilityTaxes" xlink:label="Locator_exc_UtilityTaxes_6352"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_TaxesExcludingIncomeAndExciseTaxesAbstract_6351" xlink:to="Locator_exc_UtilityTaxes_6352" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_TaxesExcludingIncomeAndExciseTaxesAbstract" xlink:label="Locator_us-gaap_TaxesExcludingIncomeAndExciseTaxesAbstract_6353"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RealEstateTaxExpense" xlink:label="Locator_us-gaap_RealEstateTaxExpense_6354"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_TaxesExcludingIncomeAndExciseTaxesAbstract_6353" xlink:to="Locator_us-gaap_RealEstateTaxExpense_6354" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_TaxesExcludingIncomeAndExciseTaxesAbstract" xlink:label="Locator_us-gaap_TaxesExcludingIncomeAndExciseTaxesAbstract_6355"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherLaborRelatedExpenses" xlink:label="Locator_us-gaap_OtherLaborRelatedExpenses_6356"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_TaxesExcludingIncomeAndExciseTaxesAbstract_6355" xlink:to="Locator_us-gaap_OtherLaborRelatedExpenses_6356" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_TaxesExcludingIncomeAndExciseTaxesAbstract" xlink:label="Locator_us-gaap_TaxesExcludingIncomeAndExciseTaxesAbstract_6357"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_TaxesOther" xlink:label="Locator_us-gaap_TaxesOther_6358"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_TaxesExcludingIncomeAndExciseTaxesAbstract_6357" xlink:to="Locator_us-gaap_TaxesOther_6358" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_TaxesExcludingIncomeAndExciseTaxesAbstract" xlink:label="Locator_us-gaap_TaxesExcludingIncomeAndExciseTaxesAbstract_6359"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_TaxesExcludingIncomeAndExciseTaxes" xlink:label="Locator_us-gaap_TaxesExcludingIncomeAndExciseTaxes_6360"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_TaxesExcludingIncomeAndExciseTaxesAbstract_6359" xlink:to="Locator_us-gaap_TaxesExcludingIncomeAndExciseTaxes_6360" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SupplementalIncomeStatementInformationLineItems" xlink:label="Locator_exc_SupplementalIncomeStatementInformationLineItems_6361"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_EquityMethodInvestmentSummarizedFinancialInformationGrossProfitLossAbstract" xlink:label="Locator_us-gaap_EquityMethodInvestmentSummarizedFinancialInformationGrossProfitLossAbstract_6362"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_SupplementalIncomeStatementInformationLineItems_6361" xlink:to="Locator_us-gaap_EquityMethodInvestmentSummarizedFinancialInformationGrossProfitLossAbstract_6362" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_EquityMethodInvestmentSummarizedFinancialInformationGrossProfitLossAbstract" xlink:label="Locator_us-gaap_EquityMethodInvestmentSummarizedFinancialInformationGrossProfitLossAbstract_6363"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_IncomeLossFromEquityMethodInvestments" xlink:label="Locator_us-gaap_IncomeLossFromEquityMethodInvestments_6364"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_EquityMethodInvestmentSummarizedFinancialInformationGrossProfitLossAbstract_6363" xlink:to="Locator_us-gaap_IncomeLossFromEquityMethodInvestments_6364" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SupplementalIncomeStatementInformationLineItems" xlink:label="Locator_exc_SupplementalIncomeStatementInformationLineItems_6365"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherNonoperatingIncomeExpenseAbstract" xlink:label="Locator_us-gaap_OtherNonoperatingIncomeExpenseAbstract_6366"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_SupplementalIncomeStatementInformationLineItems_6365" xlink:to="Locator_us-gaap_OtherNonoperatingIncomeExpenseAbstract_6366" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherNonoperatingIncomeExpenseAbstract" xlink:label="Locator_us-gaap_OtherNonoperatingIncomeExpenseAbstract_6367"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_GainLossOnNuclearDecommissioningTrustFundInvestmentsAbstract" xlink:label="Locator_exc_GainLossOnNuclearDecommissioningTrustFundInvestmentsAbstract_6368"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_OtherNonoperatingIncomeExpenseAbstract_6367" xlink:to="Locator_exc_GainLossOnNuclearDecommissioningTrustFundInvestmentsAbstract_6368" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_GainLossOnNuclearDecommissioningTrustFundInvestmentsAbstract" xlink:label="Locator_exc_GainLossOnNuclearDecommissioningTrustFundInvestmentsAbstract_6369"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RealizedGainLossInvestmentIncomeNuclearDecommissioningTrustFundsRegulatoryAccounting" xlink:label="Locator_exc_RealizedGainLossInvestmentIncomeNuclearDecommissioningTrustFundsRegulatoryAccounting_6370"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_GainLossOnNuclearDecommissioningTrustFundInvestmentsAbstract_6369" xlink:to="Locator_exc_RealizedGainLossInvestmentIncomeNuclearDecommissioningTrustFundsRegulatoryAccounting_6370" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_GainLossOnNuclearDecommissioningTrustFundInvestmentsAbstract" xlink:label="Locator_exc_GainLossOnNuclearDecommissioningTrustFundInvestmentsAbstract_6371"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RealizedGainLossInvestmentIncomeNuclearDecommissioningTrustFundsNonregulatoryAccounting" xlink:label="Locator_exc_RealizedGainLossInvestmentIncomeNuclearDecommissioningTrustFundsNonregulatoryAccounting_6372"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_GainLossOnNuclearDecommissioningTrustFundInvestmentsAbstract_6371" xlink:to="Locator_exc_RealizedGainLossInvestmentIncomeNuclearDecommissioningTrustFundsNonregulatoryAccounting_6372" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_GainLossOnNuclearDecommissioningTrustFundInvestmentsAbstract" xlink:label="Locator_exc_GainLossOnNuclearDecommissioningTrustFundInvestmentsAbstract_6373"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_UnrealizedGainLossNuclearDecommissioningTrustFundsRegulatoryAccounting" xlink:label="Locator_exc_UnrealizedGainLossNuclearDecommissioningTrustFundsRegulatoryAccounting_6374"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_GainLossOnNuclearDecommissioningTrustFundInvestmentsAbstract_6373" xlink:to="Locator_exc_UnrealizedGainLossNuclearDecommissioningTrustFundsRegulatoryAccounting_6374" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_GainLossOnNuclearDecommissioningTrustFundInvestmentsAbstract" xlink:label="Locator_exc_GainLossOnNuclearDecommissioningTrustFundInvestmentsAbstract_6375"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_UnrealizedGainLossNuclearDecommissioningTrustFundsNonregulatoryAccounting" xlink:label="Locator_exc_UnrealizedGainLossNuclearDecommissioningTrustFundsNonregulatoryAccounting_6376"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_GainLossOnNuclearDecommissioningTrustFundInvestmentsAbstract_6375" xlink:to="Locator_exc_UnrealizedGainLossNuclearDecommissioningTrustFundsNonregulatoryAccounting_6376" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_GainLossOnNuclearDecommissioningTrustFundInvestmentsAbstract" xlink:label="Locator_exc_GainLossOnNuclearDecommissioningTrustFundInvestmentsAbstract_6377"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NetUnrealizedGainLossOnPledgedAssets" xlink:label="Locator_exc_NetUnrealizedGainLossOnPledgedAssets_6378"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_GainLossOnNuclearDecommissioningTrustFundInvestmentsAbstract_6377" xlink:to="Locator_exc_NetUnrealizedGainLossOnPledgedAssets_6378" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_GainLossOnNuclearDecommissioningTrustFundInvestmentsAbstract" xlink:label="Locator_exc_GainLossOnNuclearDecommissioningTrustFundInvestmentsAbstract_6379"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RegulatoryOffsetNuclearDecommissioningTrustFundActivity" xlink:label="Locator_exc_RegulatoryOffsetNuclearDecommissioningTrustFundActivity_6380"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_GainLossOnNuclearDecommissioningTrustFundInvestmentsAbstract_6379" xlink:to="Locator_exc_RegulatoryOffsetNuclearDecommissioningTrustFundActivity_6380" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_GainLossOnNuclearDecommissioningTrustFundInvestmentsAbstract" xlink:label="Locator_exc_GainLossOnNuclearDecommissioningTrustFundInvestmentsAbstract_6381"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_GainLossInvestmentIncomeNuclearDecommissioningTrustFunds" xlink:label="Locator_exc_GainLossInvestmentIncomeNuclearDecommissioningTrustFunds_6382"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_GainLossOnNuclearDecommissioningTrustFundInvestmentsAbstract_6381" xlink:to="Locator_exc_GainLossInvestmentIncomeNuclearDecommissioningTrustFunds_6382" order="7.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherNonoperatingIncomeExpenseAbstract" xlink:label="Locator_us-gaap_OtherNonoperatingIncomeExpenseAbstract_6383"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_InvestmentIncomeInterest" xlink:label="Locator_us-gaap_InvestmentIncomeInterest_6384"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_OtherNonoperatingIncomeExpenseAbstract_6383" xlink:to="Locator_us-gaap_InvestmentIncomeInterest_6384" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherNonoperatingIncomeExpenseAbstract" xlink:label="Locator_us-gaap_OtherNonoperatingIncomeExpenseAbstract_6385"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CapitalLeasesIncomeStatementDirectFinancingLeaseRevenue" xlink:label="Locator_us-gaap_CapitalLeasesIncomeStatementDirectFinancingLeaseRevenue_6386"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_OtherNonoperatingIncomeExpenseAbstract_6385" xlink:to="Locator_us-gaap_CapitalLeasesIncomeStatementDirectFinancingLeaseRevenue_6386" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherNonoperatingIncomeExpenseAbstract" xlink:label="Locator_us-gaap_OtherNonoperatingIncomeExpenseAbstract_6387"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_UnrecognizedTaxBenefitsInterestIncome" xlink:label="Locator_exc_UnrecognizedTaxBenefitsInterestIncome_6388"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_OtherNonoperatingIncomeExpenseAbstract_6387" xlink:to="Locator_exc_UnrecognizedTaxBenefitsInterestIncome_6388" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherNonoperatingIncomeExpenseAbstract" xlink:label="Locator_us-gaap_OtherNonoperatingIncomeExpenseAbstract_6389"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_GainLossOnContractTermination" xlink:label="Locator_us-gaap_GainLossOnContractTermination_6390"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_OtherNonoperatingIncomeExpenseAbstract_6389" xlink:to="Locator_us-gaap_GainLossOnContractTermination_6390" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherNonoperatingIncomeExpenseAbstract" xlink:label="Locator_us-gaap_OtherNonoperatingIncomeExpenseAbstract_6391"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_GainsLossesOnExtinguishmentOfDebt" xlink:label="Locator_us-gaap_GainsLossesOnExtinguishmentOfDebt_6392"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_OtherNonoperatingIncomeExpenseAbstract_6391" xlink:to="Locator_us-gaap_GainsLossesOnExtinguishmentOfDebt_6392" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherNonoperatingIncomeExpenseAbstract" xlink:label="Locator_us-gaap_OtherNonoperatingIncomeExpenseAbstract_6393"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ImpairmentOfInvestments" xlink:label="Locator_us-gaap_ImpairmentOfInvestments_6394"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_OtherNonoperatingIncomeExpenseAbstract_6393" xlink:to="Locator_us-gaap_ImpairmentOfInvestments_6394" order="7.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherNonoperatingIncomeExpenseAbstract" xlink:label="Locator_us-gaap_OtherNonoperatingIncomeExpenseAbstract_6395"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LossOnContractTermination" xlink:label="Locator_us-gaap_LossOnContractTermination_6396"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_OtherNonoperatingIncomeExpenseAbstract_6395" xlink:to="Locator_us-gaap_LossOnContractTermination_6396" order="8.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherNonoperatingIncomeExpenseAbstract" xlink:label="Locator_us-gaap_OtherNonoperatingIncomeExpenseAbstract_6397"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity" xlink:label="Locator_us-gaap_PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity_6398"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_OtherNonoperatingIncomeExpenseAbstract_6397" xlink:to="Locator_us-gaap_PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity_6398" order="9.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherNonoperatingIncomeExpenseAbstract" xlink:label="Locator_us-gaap_OtherNonoperatingIncomeExpenseAbstract_6399"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessCombinationBargainPurchaseGainRecognizedAmount" xlink:label="Locator_us-gaap_BusinessCombinationBargainPurchaseGainRecognizedAmount_6400"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_OtherNonoperatingIncomeExpenseAbstract_6399" xlink:to="Locator_us-gaap_BusinessCombinationBargainPurchaseGainRecognizedAmount_6400" order="10.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessCombinationBargainPurchaseGainRecognizedAmount" xlink:label="Locator_us-gaap_BusinessCombinationBargainPurchaseGainRecognizedAmount_6401"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RealizedInvestmentGainsLosses" xlink:label="Locator_us-gaap_RealizedInvestmentGainsLosses_6402"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_BusinessCombinationBargainPurchaseGainRecognizedAmount_6401" xlink:to="Locator_us-gaap_RealizedInvestmentGainsLosses_6402" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherNonoperatingIncomeExpenseAbstract" xlink:label="Locator_us-gaap_OtherNonoperatingIncomeExpenseAbstract_6403"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherNonoperatingIncome" xlink:label="Locator_us-gaap_OtherNonoperatingIncome_6404"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_OtherNonoperatingIncomeExpenseAbstract_6403" xlink:to="Locator_us-gaap_OtherNonoperatingIncome_6404" order="11.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherNonoperatingIncomeExpenseAbstract" xlink:label="Locator_us-gaap_OtherNonoperatingIncomeExpenseAbstract_6405"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherNonoperatingIncomeExpense" xlink:label="Locator_us-gaap_OtherNonoperatingIncomeExpense_6406"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_OtherNonoperatingIncomeExpenseAbstract_6405" xlink:to="Locator_us-gaap_OtherNonoperatingIncomeExpense_6406" order="12.0" xbrldt:usable="true"/> |
| | </definitionLink> |
| <definitionLink xlink:type="extended" xlink:role="http://exeloncorp.com/role/DisclosureRegulatoryMattersDetails"> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_6913"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_6914"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_dei_LegalEntityAxis_6913" xlink:to="Locator_dei_EntityDomain_6914" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_6925"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ElectricTransmissionAmericaLlcMember" xlink:label="Locator_exc_ElectricTransmissionAmericaLlcMember_6926"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_6925" xlink:to="Locator_exc_ElectricTransmissionAmericaLlcMember_6926" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_6927"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AepTransmissionHoldingCompanyLlcMember" xlink:label="Locator_exc_AepTransmissionHoldingCompanyLlcMember_6928"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_6927" xlink:to="Locator_exc_AepTransmissionHoldingCompanyLlcMember_6928" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_6929"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RiteLineIndianaMember" xlink:label="Locator_exc_RiteLineIndianaMember_6930"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_6929" xlink:to="Locator_exc_RiteLineIndianaMember_6930" order="7.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_6931"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RiteLineIllinoisMember" xlink:label="Locator_exc_RiteLineIllinoisMember_6932"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_6931" xlink:to="Locator_exc_RiteLineIllinoisMember_6932" order="8.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_6933"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RiteLineTransmissionDevelopmentCompanyLlcMember" xlink:label="Locator_exc_RiteLineTransmissionDevelopmentCompanyLlcMember_6934"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_6933" xlink:to="Locator_exc_RiteLineTransmissionDevelopmentCompanyLlcMember_6934" order="9.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_6935"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ExelonTransmissionCompanyLlcMember" xlink:label="Locator_exc_ExelonTransmissionCompanyLlcMember_6936"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_6935" xlink:to="Locator_exc_ExelonTransmissionCompanyLlcMember_6936" order="10.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_6923"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ParentCompanyMember" xlink:label="Locator_us-gaap_ParentCompanyMember_6924"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_6923" xlink:to="Locator_us-gaap_ParentCompanyMember_6924" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_6915"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ExelonGenerationCoLLCMember" xlink:label="Locator_exc_ExelonGenerationCoLLCMember_6916"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_6915" xlink:to="Locator_exc_ExelonGenerationCoLLCMember_6916" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_6917"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CommonwealthEdisonCoMember" xlink:label="Locator_exc_CommonwealthEdisonCoMember_6918"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_6917" xlink:to="Locator_exc_CommonwealthEdisonCoMember_6918" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_6919"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PecoEnergyCoMember" xlink:label="Locator_exc_PecoEnergyCoMember_6920"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_6919" xlink:to="Locator_exc_PecoEnergyCoMember_6920" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_6921"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BaltimoreGasAndElectricCompanyMember" xlink:label="Locator_exc_BaltimoreGasAndElectricCompanyMember_6922"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_6921" xlink:to="Locator_exc_BaltimoreGasAndElectricCompanyMember_6922" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FiveYearDisclosureDomain" xlink:label="Locator_us-gaap_FiveYearDisclosureDomain_6945"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_MoreThanFourAndWithinFiveYearsFromBalanceSheetDateMember" xlink:label="Locator_us-gaap_MoreThanFourAndWithinFiveYearsFromBalanceSheetDateMember_6946"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_FiveYearDisclosureDomain_6945" xlink:to="Locator_us-gaap_MoreThanFourAndWithinFiveYearsFromBalanceSheetDateMember_6946" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FiveYearDisclosureDomain" xlink:label="Locator_us-gaap_FiveYearDisclosureDomain_6947"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_MoreThanFiveYearsFromBalanceSheetDateAndThereafterMember" xlink:label="Locator_us-gaap_MoreThanFiveYearsFromBalanceSheetDateAndThereafterMember_6948"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_FiveYearDisclosureDomain_6947" xlink:to="Locator_us-gaap_MoreThanFiveYearsFromBalanceSheetDateAndThereafterMember_6948" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FiveYearDisclosureDomain" xlink:label="Locator_us-gaap_FiveYearDisclosureDomain_6937"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OneYearFromBalanceSheetDateMember" xlink:label="Locator_us-gaap_OneYearFromBalanceSheetDateMember_6938"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_FiveYearDisclosureDomain_6937" xlink:to="Locator_us-gaap_OneYearFromBalanceSheetDateMember_6938" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FiveYearDisclosureDomain" xlink:label="Locator_us-gaap_FiveYearDisclosureDomain_6939"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_MoreThanOneAndWithinTwoYearsFromBalanceSheetDateMember" xlink:label="Locator_us-gaap_MoreThanOneAndWithinTwoYearsFromBalanceSheetDateMember_6940"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_FiveYearDisclosureDomain_6939" xlink:to="Locator_us-gaap_MoreThanOneAndWithinTwoYearsFromBalanceSheetDateMember_6940" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FiveYearDisclosureDomain" xlink:label="Locator_us-gaap_FiveYearDisclosureDomain_6941"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_MoreThanTwoAndWithinThreeYearsFromBalanceSheetDateMember" xlink:label="Locator_us-gaap_MoreThanTwoAndWithinThreeYearsFromBalanceSheetDateMember_6942"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_FiveYearDisclosureDomain_6941" xlink:to="Locator_us-gaap_MoreThanTwoAndWithinThreeYearsFromBalanceSheetDateMember_6942" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FiveYearDisclosureDomain" xlink:label="Locator_us-gaap_FiveYearDisclosureDomain_6943"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_MoreThanThreeAndWithinFourYearsFromBalanceSheetDateMember" xlink:label="Locator_us-gaap_MoreThanThreeAndWithinFourYearsFromBalanceSheetDateMember_6944"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_FiveYearDisclosureDomain_6943" xlink:to="Locator_us-gaap_MoreThanThreeAndWithinFourYearsFromBalanceSheetDateMember_6944" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RegulatoryLiabilityAxis" xlink:label="Locator_us-gaap_RegulatoryLiabilityAxis_6443"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RegulatoryLiabilityDomain" xlink:label="Locator_us-gaap_RegulatoryLiabilityDomain_6444"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="Locator_us-gaap_RegulatoryLiabilityAxis_6443" xlink:to="Locator_us-gaap_RegulatoryLiabilityDomain_6444" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RegulatoryLiabilityAxis" xlink:label="Locator_us-gaap_RegulatoryLiabilityAxis_6949"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RegulatoryLiabilityDomain" xlink:label="Locator_us-gaap_RegulatoryLiabilityDomain_6950"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_us-gaap_RegulatoryLiabilityAxis_6949" xlink:to="Locator_us-gaap_RegulatoryLiabilityDomain_6950" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RegulatoryLiabilityDomain" xlink:label="Locator_us-gaap_RegulatoryLiabilityDomain_6951"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NuclearDecommissioningMember" xlink:label="Locator_exc_NuclearDecommissioningMember_6952"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RegulatoryLiabilityDomain_6951" xlink:to="Locator_exc_NuclearDecommissioningMember_6952" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RegulatoryLiabilityDomain" xlink:label="Locator_us-gaap_RegulatoryLiabilityDomain_6953"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RemovalCostsMember" xlink:label="Locator_exc_RemovalCostsMember_6954"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RegulatoryLiabilityDomain_6953" xlink:to="Locator_exc_RemovalCostsMember_6954" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RegulatoryLiabilityDomain" xlink:label="Locator_us-gaap_RegulatoryLiabilityDomain_6955"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EnergyEfficiencyDemandResponseProgramsMember" xlink:label="Locator_exc_EnergyEfficiencyDemandResponseProgramsMember_6956"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RegulatoryLiabilityDomain_6955" xlink:to="Locator_exc_EnergyEfficiencyDemandResponseProgramsMember_6956" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RegulatoryLiabilityDomain" xlink:label="Locator_us-gaap_RegulatoryLiabilityDomain_6957"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ElectricTransmissionAndDistributionTaxRepairsMember" xlink:label="Locator_exc_ElectricTransmissionAndDistributionTaxRepairsMember_6958"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RegulatoryLiabilityDomain_6957" xlink:to="Locator_exc_ElectricTransmissionAndDistributionTaxRepairsMember_6958" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RegulatoryLiabilityDomain" xlink:label="Locator_us-gaap_RegulatoryLiabilityDomain_6959"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OverRecoveredDistributionServicesCostsMember" xlink:label="Locator_exc_OverRecoveredDistributionServicesCostsMember_6960"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RegulatoryLiabilityDomain_6959" xlink:to="Locator_exc_OverRecoveredDistributionServicesCostsMember_6960" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RegulatoryLiabilityDomain" xlink:label="Locator_us-gaap_RegulatoryLiabilityDomain_6961"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OverRecoveredUncollectibleAccountsExpenseMember" xlink:label="Locator_exc_OverRecoveredUncollectibleAccountsExpenseMember_6962"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RegulatoryLiabilityDomain_6961" xlink:to="Locator_exc_OverRecoveredUncollectibleAccountsExpenseMember_6962" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RegulatoryLiabilityDomain" xlink:label="Locator_us-gaap_RegulatoryLiabilityDomain_6963"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OverRecoveredEnergyAndTransmissionCostsMember" xlink:label="Locator_exc_OverRecoveredEnergyAndTransmissionCostsMember_6964"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RegulatoryLiabilityDomain_6963" xlink:to="Locator_exc_OverRecoveredEnergyAndTransmissionCostsMember_6964" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RegulatoryLiabilityDomain" xlink:label="Locator_us-gaap_RegulatoryLiabilityDomain_6965"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OverRecoveredUniversalServiceFundCostsMember" xlink:label="Locator_exc_OverRecoveredUniversalServiceFundCostsMember_6966"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RegulatoryLiabilityDomain_6965" xlink:to="Locator_exc_OverRecoveredUniversalServiceFundCostsMember_6966" order="7.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RegulatoryLiabilityDomain" xlink:label="Locator_us-gaap_RegulatoryLiabilityDomain_6967"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OverRecoveredAepsCostsMember" xlink:label="Locator_exc_OverRecoveredAepsCostsMember_6968"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RegulatoryLiabilityDomain_6967" xlink:to="Locator_exc_OverRecoveredAepsCostsMember_6968" order="8.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RegulatoryLiabilityDomain" xlink:label="Locator_us-gaap_RegulatoryLiabilityDomain_6969"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CustomerRateCreditMember" xlink:label="Locator_exc_CustomerRateCreditMember_6970"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RegulatoryLiabilityDomain_6969" xlink:to="Locator_exc_CustomerRateCreditMember_6970" order="9.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RegulatoryLiabilityDomain" xlink:label="Locator_us-gaap_RegulatoryLiabilityDomain_6971"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RegulatoryLiabilitiesOtherMember" xlink:label="Locator_exc_RegulatoryLiabilitiesOtherMember_6972"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RegulatoryLiabilityDomain_6971" xlink:to="Locator_exc_RegulatoryLiabilitiesOtherMember_6972" order="10.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RegulatoryLiabilityDomain" xlink:label="Locator_us-gaap_RegulatoryLiabilityDomain_6973"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_GasDistributionTaxRepairsMember" xlink:label="Locator_exc_GasDistributionTaxRepairsMember_6974"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RegulatoryLiabilityDomain_6973" xlink:to="Locator_exc_GasDistributionTaxRepairsMember_6974" order="11.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementScenarioAxis" xlink:label="Locator_us-gaap_StatementScenarioAxis_7027"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScenarioUnspecifiedDomain" xlink:label="Locator_us-gaap_ScenarioUnspecifiedDomain_7028"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_us-gaap_StatementScenarioAxis_7027" xlink:to="Locator_us-gaap_ScenarioUnspecifiedDomain_7028" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScenarioUnspecifiedDomain" xlink:label="Locator_us-gaap_ScenarioUnspecifiedDomain_7029"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ScenarioPriorYearMember" xlink:label="Locator_exc_ScenarioPriorYearMember_7030"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_ScenarioUnspecifiedDomain_7029" xlink:to="Locator_exc_ScenarioPriorYearMember_7030" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RateReliefCostsLineItems" xlink:label="Locator_exc_RateReliefCostsLineItems_6659"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RateReliefCostsTable" xlink:label="Locator_exc_RateReliefCostsTable_6660"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="Locator_exc_RateReliefCostsLineItems_6659" xlink:to="Locator_exc_RateReliefCostsTable_6660" order="0.5" xbrldt:contextElement="segment" xbrldt:closed="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RateReliefCostsTable" xlink:label="Locator_exc_RateReliefCostsTable_6899"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_6900"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_exc_RateReliefCostsTable_6899" xlink:to="Locator_dei_LegalEntityAxis_6900" order="0.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RateReliefCostsLineItems" xlink:label="Locator_exc_RateReliefCostsLineItems_7395"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ComEdCustomerRateReliefCosts" xlink:label="Locator_exc_ComEdCustomerRateReliefCosts_7396"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_RateReliefCostsLineItems_7395" xlink:to="Locator_exc_ComEdCustomerRateReliefCosts_7396" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RateReliefCostsLineItems" xlink:label="Locator_exc_RateReliefCostsLineItems_7397"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OtherUtilityCustomerRateReliefCosts" xlink:label="Locator_exc_OtherUtilityCustomerRateReliefCosts_7398"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_RateReliefCostsLineItems_7397" xlink:to="Locator_exc_OtherUtilityCustomerRateReliefCosts_7398" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RateReliefCostsLineItems" xlink:label="Locator_exc_RateReliefCostsLineItems_7399"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OtherRateReliefPrograms" xlink:label="Locator_exc_OtherRateReliefPrograms_7400"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_RateReliefCostsLineItems_7399" xlink:to="Locator_exc_OtherRateReliefPrograms_7400" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RateReliefCostsLineItems" xlink:label="Locator_exc_RateReliefCostsLineItems_7401"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RateReliefCosts" xlink:label="Locator_exc_RateReliefCosts_7402"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_RateReliefCostsLineItems_7401" xlink:to="Locator_exc_RateReliefCosts_7402" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OperatingAndMaintenanceForRegulatoryRequiredProgramsLineItems" xlink:label="Locator_exc_OperatingAndMaintenanceForRegulatoryRequiredProgramsLineItems_6673"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OperatingAndMaintenanceForRegulatoryRequiredProgramsTable" xlink:label="Locator_exc_OperatingAndMaintenanceForRegulatoryRequiredProgramsTable_6674"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="Locator_exc_OperatingAndMaintenanceForRegulatoryRequiredProgramsLineItems_6673" xlink:to="Locator_exc_OperatingAndMaintenanceForRegulatoryRequiredProgramsTable_6674" order="0.5" xbrldt:contextElement="segment" xbrldt:closed="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OperatingAndMaintenanceForRegulatoryRequiredProgramsTable" xlink:label="Locator_exc_OperatingAndMaintenanceForRegulatoryRequiredProgramsTable_6901"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_6902"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_exc_OperatingAndMaintenanceForRegulatoryRequiredProgramsTable_6901" xlink:to="Locator_dei_LegalEntityAxis_6902" order="0.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OperatingAndMaintenanceForRegulatoryRequiredProgramsLineItems" xlink:label="Locator_exc_OperatingAndMaintenanceForRegulatoryRequiredProgramsLineItems_7403"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OtherCostAndExpenseOperatingEnergyEfficiencyAndDemandResponsePrograms" xlink:label="Locator_exc_OtherCostAndExpenseOperatingEnergyEfficiencyAndDemandResponsePrograms_7404"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_OperatingAndMaintenanceForRegulatoryRequiredProgramsLineItems_7403" xlink:to="Locator_exc_OtherCostAndExpenseOperatingEnergyEfficiencyAndDemandResponsePrograms_7404" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OperatingAndMaintenanceForRegulatoryRequiredProgramsLineItems" xlink:label="Locator_exc_OperatingAndMaintenanceForRegulatoryRequiredProgramsLineItems_7405"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OtherCostAndExpenseOperatingAdvancedMeteringInfrastructurePilotProgram" xlink:label="Locator_exc_OtherCostAndExpenseOperatingAdvancedMeteringInfrastructurePilotProgram_7406"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_OperatingAndMaintenanceForRegulatoryRequiredProgramsLineItems_7405" xlink:to="Locator_exc_OtherCostAndExpenseOperatingAdvancedMeteringInfrastructurePilotProgram_7406" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OperatingAndMaintenanceForRegulatoryRequiredProgramsLineItems" xlink:label="Locator_exc_OperatingAndMaintenanceForRegulatoryRequiredProgramsLineItems_7407"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OtherCostAndExpenseOperatingPurchasedPowerAdministrativeCosts" xlink:label="Locator_exc_OtherCostAndExpenseOperatingPurchasedPowerAdministrativeCosts_7408"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_OperatingAndMaintenanceForRegulatoryRequiredProgramsLineItems_7407" xlink:to="Locator_exc_OtherCostAndExpenseOperatingPurchasedPowerAdministrativeCosts_7408" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OperatingAndMaintenanceForRegulatoryRequiredProgramsLineItems" xlink:label="Locator_exc_OperatingAndMaintenanceForRegulatoryRequiredProgramsLineItems_7409"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OtherCostAndExpenseOperatingRelatedToLegislationAdministrativeCosts" xlink:label="Locator_exc_OtherCostAndExpenseOperatingRelatedToLegislationAdministrativeCosts_7410"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_OperatingAndMaintenanceForRegulatoryRequiredProgramsLineItems_7409" xlink:to="Locator_exc_OtherCostAndExpenseOperatingRelatedToLegislationAdministrativeCosts_7410" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OperatingAndMaintenanceForRegulatoryRequiredProgramsLineItems" xlink:label="Locator_exc_OperatingAndMaintenanceForRegulatoryRequiredProgramsLineItems_7411"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OtherCostAndExpenseOperatingConsumerEducationCosts" xlink:label="Locator_exc_OtherCostAndExpenseOperatingConsumerEducationCosts_7412"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_OperatingAndMaintenanceForRegulatoryRequiredProgramsLineItems_7411" xlink:to="Locator_exc_OtherCostAndExpenseOperatingConsumerEducationCosts_7412" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OperatingAndMaintenanceForRegulatoryRequiredProgramsLineItems" xlink:label="Locator_exc_OperatingAndMaintenanceForRegulatoryRequiredProgramsLineItems_7413"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OtherCostAndExpenseOperatingRegulatoryRequiredPrograms" xlink:label="Locator_exc_OtherCostAndExpenseOperatingRegulatoryRequiredPrograms_7414"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_OperatingAndMaintenanceForRegulatoryRequiredProgramsLineItems_7413" xlink:to="Locator_exc_OtherCostAndExpenseOperatingRegulatoryRequiredPrograms_7414" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RegulatoryMattersAdditionalNarrativeInformationLineItems" xlink:label="Locator_exc_RegulatoryMattersAdditionalNarrativeInformationLineItems_6503"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RegulatoryMattersAdditionalNarrativeInformationTable" xlink:label="Locator_exc_RegulatoryMattersAdditionalNarrativeInformationTable_6504"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="Locator_exc_RegulatoryMattersAdditionalNarrativeInformationLineItems_6503" xlink:to="Locator_exc_RegulatoryMattersAdditionalNarrativeInformationTable_6504" order="0.5" xbrldt:contextElement="segment" xbrldt:closed="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RegulatoryMattersAdditionalNarrativeInformationTable" xlink:label="Locator_exc_RegulatoryMattersAdditionalNarrativeInformationTable_6903"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_6904"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_exc_RegulatoryMattersAdditionalNarrativeInformationTable_6903" xlink:to="Locator_dei_LegalEntityAxis_6904" order="0.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RegulatoryMattersAdditionalNarrativeInformationTable" xlink:label="Locator_exc_RegulatoryMattersAdditionalNarrativeInformationTable_6905"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ScheduleOfRegulatoryFuturePeriodInformationAxis" xlink:label="Locator_exc_ScheduleOfRegulatoryFuturePeriodInformationAxis_6906"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_exc_RegulatoryMattersAdditionalNarrativeInformationTable_6905" xlink:to="Locator_exc_ScheduleOfRegulatoryFuturePeriodInformationAxis_6906" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ScheduleOfRegulatoryFuturePeriodInformationAxis" xlink:label="Locator_exc_ScheduleOfRegulatoryFuturePeriodInformationAxis_6447"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FiveYearDisclosureDomain" xlink:label="Locator_us-gaap_FiveYearDisclosureDomain_6448"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="Locator_exc_ScheduleOfRegulatoryFuturePeriodInformationAxis_6447" xlink:to="Locator_us-gaap_FiveYearDisclosureDomain_6448" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ScheduleOfRegulatoryFuturePeriodInformationAxis" xlink:label="Locator_exc_ScheduleOfRegulatoryFuturePeriodInformationAxis_7031"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FiveYearDisclosureDomain" xlink:label="Locator_us-gaap_FiveYearDisclosureDomain_7032"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_exc_ScheduleOfRegulatoryFuturePeriodInformationAxis_7031" xlink:to="Locator_us-gaap_FiveYearDisclosureDomain_7032" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RegulatoryMattersAdditionalNarrativeInformationTable" xlink:label="Locator_exc_RegulatoryMattersAdditionalNarrativeInformationTable_6907"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RegulatoryAssetLiabilityAxis" xlink:label="Locator_exc_RegulatoryAssetLiabilityAxis_6908"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_exc_RegulatoryMattersAdditionalNarrativeInformationTable_6907" xlink:to="Locator_exc_RegulatoryAssetLiabilityAxis_6908" order="2.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RegulatoryAssetLiabilityAxis" xlink:label="Locator_exc_RegulatoryAssetLiabilityAxis_6449"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RegulatoryAssetDomain" xlink:label="Locator_us-gaap_RegulatoryAssetDomain_6450"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="Locator_exc_RegulatoryAssetLiabilityAxis_6449" xlink:to="Locator_us-gaap_RegulatoryAssetDomain_6450" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RegulatoryAssetLiabilityAxis" xlink:label="Locator_exc_RegulatoryAssetLiabilityAxis_7033"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RegulatoryAssetDomain" xlink:label="Locator_us-gaap_RegulatoryAssetDomain_7034"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_exc_RegulatoryAssetLiabilityAxis_7033" xlink:to="Locator_us-gaap_RegulatoryAssetDomain_7034" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RegulatoryAssetDomain" xlink:label="Locator_us-gaap_RegulatoryAssetDomain_6977"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PensionAndOtherPostretirementBenefitsMember" xlink:label="Locator_exc_PensionAndOtherPostretirementBenefitsMember_6978"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RegulatoryAssetDomain_6977" xlink:to="Locator_exc_PensionAndOtherPostretirementBenefitsMember_6978" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RegulatoryAssetDomain" xlink:label="Locator_us-gaap_RegulatoryAssetDomain_6979"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DeferredIncomeTaxChargesMember" xlink:label="Locator_us-gaap_DeferredIncomeTaxChargesMember_6980"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RegulatoryAssetDomain_6979" xlink:to="Locator_us-gaap_DeferredIncomeTaxChargesMember_6980" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RegulatoryAssetDomain" xlink:label="Locator_us-gaap_RegulatoryAssetDomain_6981"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AmiExpensesMember" xlink:label="Locator_exc_AmiExpensesMember_6982"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RegulatoryAssetDomain_6981" xlink:to="Locator_exc_AmiExpensesMember_6982" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RegulatoryAssetDomain" xlink:label="Locator_us-gaap_RegulatoryAssetDomain_6983"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_UnderRecoveredDistributionServiceCostsMember" xlink:label="Locator_exc_UnderRecoveredDistributionServiceCostsMember_6984"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RegulatoryAssetDomain_6983" xlink:to="Locator_exc_UnderRecoveredDistributionServiceCostsMember_6984" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RegulatoryAssetDomain" xlink:label="Locator_us-gaap_RegulatoryAssetDomain_6985"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LossOnReacquiredDebtMember" xlink:label="Locator_us-gaap_LossOnReacquiredDebtMember_6986"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RegulatoryAssetDomain_6985" xlink:to="Locator_us-gaap_LossOnReacquiredDebtMember_6986" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RegulatoryAssetDomain" xlink:label="Locator_us-gaap_RegulatoryAssetDomain_6987"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueOfLongTermDebtMember" xlink:label="Locator_exc_FairValueOfLongTermDebtMember_6988"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RegulatoryAssetDomain_6987" xlink:to="Locator_exc_FairValueOfLongTermDebtMember_6988" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RegulatoryAssetDomain" xlink:label="Locator_us-gaap_RegulatoryAssetDomain_6989"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueOfSupplyContractMember" xlink:label="Locator_exc_FairValueOfSupplyContractMember_6990"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RegulatoryAssetDomain_6989" xlink:to="Locator_exc_FairValueOfSupplyContractMember_6990" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RegulatoryAssetDomain" xlink:label="Locator_us-gaap_RegulatoryAssetDomain_6991"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_EmployeeSeveranceMember" xlink:label="Locator_us-gaap_EmployeeSeveranceMember_6992"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RegulatoryAssetDomain_6991" xlink:to="Locator_us-gaap_EmployeeSeveranceMember_6992" order="7.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RegulatoryAssetDomain" xlink:label="Locator_us-gaap_RegulatoryAssetDomain_6993"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AssetRetirementObligationCostsMember" xlink:label="Locator_us-gaap_AssetRetirementObligationCostsMember_6994"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RegulatoryAssetDomain_6993" xlink:to="Locator_us-gaap_AssetRetirementObligationCostsMember_6994" order="8.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RegulatoryAssetDomain" xlink:label="Locator_us-gaap_RegulatoryAssetDomain_6995"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_EnvironmentalRestorationCostsMember" xlink:label="Locator_us-gaap_EnvironmentalRestorationCostsMember_6996"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RegulatoryAssetDomain_6995" xlink:to="Locator_us-gaap_EnvironmentalRestorationCostsMember_6996" order="9.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RegulatoryAssetDomain" xlink:label="Locator_us-gaap_RegulatoryAssetDomain_6997"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RtoStartupCostsMember" xlink:label="Locator_exc_RtoStartupCostsMember_6998"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RegulatoryAssetDomain_6997" xlink:to="Locator_exc_RtoStartupCostsMember_6998" order="10.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RegulatoryAssetDomain" xlink:label="Locator_us-gaap_RegulatoryAssetDomain_6999"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_UnderRecoveredUniversalServiceFundCostsMemberMember" xlink:label="Locator_exc_UnderRecoveredUniversalServiceFundCostsMemberMember_7000"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RegulatoryAssetDomain_6999" xlink:to="Locator_exc_UnderRecoveredUniversalServiceFundCostsMemberMember_7000" order="11.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RegulatoryAssetDomain" xlink:label="Locator_us-gaap_RegulatoryAssetDomain_7001"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_UnderRecoveredUncollectibleAccountsExpenseMember" xlink:label="Locator_exc_UnderRecoveredUncollectibleAccountsExpenseMember_7002"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RegulatoryAssetDomain_7001" xlink:to="Locator_exc_UnderRecoveredUncollectibleAccountsExpenseMember_7002" order="12.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RegulatoryAssetDomain" xlink:label="Locator_us-gaap_RegulatoryAssetDomain_7003"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FinancialSwapWithGenerationMember" xlink:label="Locator_exc_FinancialSwapWithGenerationMember_7004"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RegulatoryAssetDomain_7003" xlink:to="Locator_exc_FinancialSwapWithGenerationMember_7004" order="13.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RegulatoryAssetDomain" xlink:label="Locator_us-gaap_RegulatoryAssetDomain_7005"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RenewableEnergyAndAssociatedRecMember" xlink:label="Locator_exc_RenewableEnergyAndAssociatedRecMember_7006"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RegulatoryAssetDomain_7005" xlink:to="Locator_exc_RenewableEnergyAndAssociatedRecMember_7006" order="14.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RegulatoryAssetDomain" xlink:label="Locator_us-gaap_RegulatoryAssetDomain_7007"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_UnderRecoveredEnergyAndTransmissionCostsMember" xlink:label="Locator_exc_UnderRecoveredEnergyAndTransmissionCostsMember_7008"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RegulatoryAssetDomain_7007" xlink:to="Locator_exc_UnderRecoveredEnergyAndTransmissionCostsMember_7008" order="15.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RegulatoryAssetDomain" xlink:label="Locator_us-gaap_RegulatoryAssetDomain_7009"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DspProgramElectricProcurementContractsMember" xlink:label="Locator_exc_DspProgramElectricProcurementContractsMember_7010"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RegulatoryAssetDomain_7009" xlink:to="Locator_exc_DspProgramElectricProcurementContractsMember_7010" order="16.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RegulatoryAssetDomain" xlink:label="Locator_us-gaap_RegulatoryAssetDomain_7011"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DspIiProgramElectricProcurementContractsMember" xlink:label="Locator_exc_DspIiProgramElectricProcurementContractsMember_7012"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RegulatoryAssetDomain_7011" xlink:to="Locator_exc_DspIiProgramElectricProcurementContractsMember_7012" order="17.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RegulatoryAssetDomain" xlink:label="Locator_us-gaap_RegulatoryAssetDomain_7013"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DspProgramCostsMember" xlink:label="Locator_exc_DspProgramCostsMember_7014"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RegulatoryAssetDomain_7013" xlink:to="Locator_exc_DspProgramCostsMember_7014" order="18.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RegulatoryAssetDomain" xlink:label="Locator_us-gaap_RegulatoryAssetDomain_7015"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DspIiProgramCostsMember" xlink:label="Locator_exc_DspIiProgramCostsMember_7016"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RegulatoryAssetDomain_7015" xlink:to="Locator_exc_DspIiProgramCostsMember_7016" order="19.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RegulatoryAssetDomain" xlink:label="Locator_us-gaap_RegulatoryAssetDomain_7017"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DeferredStormCostsMember" xlink:label="Locator_exc_DeferredStormCostsMember_7018"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RegulatoryAssetDomain_7017" xlink:to="Locator_exc_DeferredStormCostsMember_7018" order="20.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RegulatoryAssetDomain" xlink:label="Locator_us-gaap_RegulatoryAssetDomain_7019"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ElectricGenerationRelatedRegulatoryAssetMember" xlink:label="Locator_exc_ElectricGenerationRelatedRegulatoryAssetMember_7020"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RegulatoryAssetDomain_7019" xlink:to="Locator_exc_ElectricGenerationRelatedRegulatoryAssetMember_7020" order="21.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RegulatoryAssetDomain" xlink:label="Locator_us-gaap_RegulatoryAssetDomain_7021"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RateStabilizationDeferralMember" xlink:label="Locator_exc_RateStabilizationDeferralMember_7022"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RegulatoryAssetDomain_7021" xlink:to="Locator_exc_RateStabilizationDeferralMember_7022" order="22.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RegulatoryAssetDomain" xlink:label="Locator_us-gaap_RegulatoryAssetDomain_7023"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EnergyEfficiencyAndDemandResponseProgramsMember" xlink:label="Locator_exc_EnergyEfficiencyAndDemandResponseProgramsMember_7024"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RegulatoryAssetDomain_7023" xlink:to="Locator_exc_EnergyEfficiencyAndDemandResponseProgramsMember_7024" order="23.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RegulatoryAssetDomain" xlink:label="Locator_us-gaap_RegulatoryAssetDomain_7025"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OtherRegulatoryAssetsMember" xlink:label="Locator_exc_OtherRegulatoryAssetsMember_7026"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RegulatoryAssetDomain_7025" xlink:to="Locator_exc_OtherRegulatoryAssetsMember_7026" order="24.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RegulatoryMattersAdditionalNarrativeInformationTable" xlink:label="Locator_exc_RegulatoryMattersAdditionalNarrativeInformationTable_6909"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementScenarioAxis" xlink:label="Locator_us-gaap_StatementScenarioAxis_6910"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_exc_RegulatoryMattersAdditionalNarrativeInformationTable_6909" xlink:to="Locator_us-gaap_StatementScenarioAxis_6910" order="3.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RegulatoryMattersAdditionalNarrativeInformationLineItems" xlink:label="Locator_exc_RegulatoryMattersAdditionalNarrativeInformationLineItems_7035"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EnergyInfrastructureModernizationActAbstract" xlink:label="Locator_exc_EnergyInfrastructureModernizationActAbstract_7036"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_RegulatoryMattersAdditionalNarrativeInformationLineItems_7035" xlink:to="Locator_exc_EnergyInfrastructureModernizationActAbstract_7036" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EnergyInfrastructureModernizationActAbstract" xlink:label="Locator_exc_EnergyInfrastructureModernizationActAbstract_7037"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AdditionalInvestmentToModernizeSystemAndSmartGridTechnology" xlink:label="Locator_exc_AdditionalInvestmentToModernizeSystemAndSmartGridTechnology_7038"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_EnergyInfrastructureModernizationActAbstract_7037" xlink:to="Locator_exc_AdditionalInvestmentToModernizeSystemAndSmartGridTechnology_7038" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EnergyInfrastructureModernizationActAbstract" xlink:label="Locator_exc_EnergyInfrastructureModernizationActAbstract_7039"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PotentialAdditionalInvestmentToModernizeSystemAndSmartGridTechnology" xlink:label="Locator_exc_PotentialAdditionalInvestmentToModernizeSystemAndSmartGridTechnology_7040"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_EnergyInfrastructureModernizationActAbstract_7039" xlink:to="Locator_exc_PotentialAdditionalInvestmentToModernizeSystemAndSmartGridTechnology_7040" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EnergyInfrastructureModernizationActAbstract" xlink:label="Locator_exc_EnergyInfrastructureModernizationActAbstract_7041"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CostOfUtilities" xlink:label="Locator_us-gaap_CostOfUtilities_7042"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_EnergyInfrastructureModernizationActAbstract_7041" xlink:to="Locator_us-gaap_CostOfUtilities_7042" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EnergyInfrastructureModernizationActAbstract" xlink:label="Locator_exc_EnergyInfrastructureModernizationActAbstract_7043"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_UtilityDistributionStormHardening" xlink:label="Locator_exc_UtilityDistributionStormHardening_7044"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_EnergyInfrastructureModernizationActAbstract_7043" xlink:to="Locator_exc_UtilityDistributionStormHardening_7044" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EnergyInfrastructureModernizationActAbstract" xlink:label="Locator_exc_EnergyInfrastructureModernizationActAbstract_7045"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_UtilityAnnualCustomerAssistance" xlink:label="Locator_exc_UtilityAnnualCustomerAssistance_7046"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_EnergyInfrastructureModernizationActAbstract_7045" xlink:to="Locator_exc_UtilityAnnualCustomerAssistance_7046" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EnergyInfrastructureModernizationActAbstract" xlink:label="Locator_exc_EnergyInfrastructureModernizationActAbstract_7047"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ContributionToTechnologyInnovationTrust" xlink:label="Locator_exc_ContributionToTechnologyInnovationTrust_7048"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_EnergyInfrastructureModernizationActAbstract_7047" xlink:to="Locator_exc_ContributionToTechnologyInnovationTrust_7048" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EnergyInfrastructureModernizationActAbstract" xlink:label="Locator_exc_EnergyInfrastructureModernizationActAbstract_7049"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SubsequentContributionToTechnologyInnovationTrust" xlink:label="Locator_exc_SubsequentContributionToTechnologyInnovationTrust_7050"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_EnergyInfrastructureModernizationActAbstract_7049" xlink:to="Locator_exc_SubsequentContributionToTechnologyInnovationTrust_7050" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EnergyInfrastructureModernizationActAbstract" xlink:label="Locator_exc_EnergyInfrastructureModernizationActAbstract_7051"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CurrentStateLegislationTimePeriod" xlink:label="Locator_exc_CurrentStateLegislationTimePeriod_7052"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_EnergyInfrastructureModernizationActAbstract_7051" xlink:to="Locator_exc_CurrentStateLegislationTimePeriod_7052" order="7.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EnergyInfrastructureModernizationActAbstract" xlink:label="Locator_exc_EnergyInfrastructureModernizationActAbstract_7053"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_TimePeriodForAmiDeploymentPlan" xlink:label="Locator_exc_TimePeriodForAmiDeploymentPlan_7054"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_EnergyInfrastructureModernizationActAbstract_7053" xlink:to="Locator_exc_TimePeriodForAmiDeploymentPlan_7054" order="8.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EnergyInfrastructureModernizationActAbstract" xlink:label="Locator_exc_EnergyInfrastructureModernizationActAbstract_7055"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AnnualCapitalSpendUnderStateLegislation" xlink:label="Locator_exc_AnnualCapitalSpendUnderStateLegislation_7056"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_EnergyInfrastructureModernizationActAbstract_7055" xlink:to="Locator_exc_AnnualCapitalSpendUnderStateLegislation_7056" order="9.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EnergyInfrastructureModernizationActAbstract" xlink:label="Locator_exc_EnergyInfrastructureModernizationActAbstract_7057"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CustomerAssistanceProgramTimePeriod" xlink:label="Locator_exc_CustomerAssistanceProgramTimePeriod_7058"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_EnergyInfrastructureModernizationActAbstract_7057" xlink:to="Locator_exc_CustomerAssistanceProgramTimePeriod_7058" order="10.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EnergyInfrastructureModernizationActAbstract" xlink:label="Locator_exc_EnergyInfrastructureModernizationActAbstract_7059"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DaysUntilNewElectricDistributionRates" xlink:label="Locator_exc_DaysUntilNewElectricDistributionRates_7060"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_EnergyInfrastructureModernizationActAbstract_7059" xlink:to="Locator_exc_DaysUntilNewElectricDistributionRates_7060" order="11.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EnergyInfrastructureModernizationActAbstract" xlink:label="Locator_exc_EnergyInfrastructureModernizationActAbstract_7061"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AnnualRevenueRequirementReduction" xlink:label="Locator_exc_AnnualRevenueRequirementReduction_7062"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_EnergyInfrastructureModernizationActAbstract_7061" xlink:to="Locator_exc_AnnualRevenueRequirementReduction_7062" order="12.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EnergyInfrastructureModernizationActAbstract" xlink:label="Locator_exc_EnergyInfrastructureModernizationActAbstract_7063"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AnnualRevenueRequirementIncrementalReduction" xlink:label="Locator_exc_AnnualRevenueRequirementIncrementalReduction_7064"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_EnergyInfrastructureModernizationActAbstract_7063" xlink:to="Locator_exc_AnnualRevenueRequirementIncrementalReduction_7064" order="13.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EnergyInfrastructureModernizationActAbstract" xlink:label="Locator_exc_EnergyInfrastructureModernizationActAbstract_7065"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AnnualRevenueRequirementReductionAttributableToAlternateRecovery" xlink:label="Locator_exc_AnnualRevenueRequirementReductionAttributableToAlternateRecovery_7066"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_EnergyInfrastructureModernizationActAbstract_7065" xlink:to="Locator_exc_AnnualRevenueRequirementReductionAttributableToAlternateRecovery_7066" order="14.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EnergyInfrastructureModernizationActAbstract" xlink:label="Locator_exc_EnergyInfrastructureModernizationActAbstract_7067"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AnnualRevenueRequirementReductionAttributableToPension" xlink:label="Locator_exc_AnnualRevenueRequirementReductionAttributableToPension_7068"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_EnergyInfrastructureModernizationActAbstract_7067" xlink:to="Locator_exc_AnnualRevenueRequirementReductionAttributableToPension_7068" order="15.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EnergyInfrastructureModernizationActAbstract" xlink:label="Locator_exc_EnergyInfrastructureModernizationActAbstract_7069"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AnnualRevenueRequirementReductionAttributableToIncentives" xlink:label="Locator_exc_AnnualRevenueRequirementReductionAttributableToIncentives_7070"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_EnergyInfrastructureModernizationActAbstract_7069" xlink:to="Locator_exc_AnnualRevenueRequirementReductionAttributableToIncentives_7070" order="16.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EnergyInfrastructureModernizationActAbstract" xlink:label="Locator_exc_EnergyInfrastructureModernizationActAbstract_7071"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AnnualRevenueRequirementAdjustmentsAttributableToOtherAdjustments" xlink:label="Locator_exc_AnnualRevenueRequirementAdjustmentsAttributableToOtherAdjustments_7072"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_EnergyInfrastructureModernizationActAbstract_7071" xlink:to="Locator_exc_AnnualRevenueRequirementAdjustmentsAttributableToOtherAdjustments_7072" order="17.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EnergyInfrastructureModernizationActAbstract" xlink:label="Locator_exc_EnergyInfrastructureModernizationActAbstract_7073"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RegulatoryAssetReductionDueToFinalOrder" xlink:label="Locator_exc_RegulatoryAssetReductionDueToFinalOrder_7074"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_EnergyInfrastructureModernizationActAbstract_7073" xlink:to="Locator_exc_RegulatoryAssetReductionDueToFinalOrder_7074" order="18.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EnergyInfrastructureModernizationActAbstract" xlink:label="Locator_exc_EnergyInfrastructureModernizationActAbstract_7075"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_UnderOverRecoveredDistributionServiceCosts" xlink:label="Locator_exc_UnderOverRecoveredDistributionServiceCosts_7076"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_EnergyInfrastructureModernizationActAbstract_7075" xlink:to="Locator_exc_UnderOverRecoveredDistributionServiceCosts_7076" order="19.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EnergyInfrastructureModernizationActAbstract" xlink:label="Locator_exc_EnergyInfrastructureModernizationActAbstract_7077"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CostRecoveryForSignificantOneTimeEvents" xlink:label="Locator_exc_CostRecoveryForSignificantOneTimeEvents_7078"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_EnergyInfrastructureModernizationActAbstract_7077" xlink:to="Locator_exc_CostRecoveryForSignificantOneTimeEvents_7078" order="20.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EnergyInfrastructureModernizationActAbstract" xlink:label="Locator_exc_EnergyInfrastructureModernizationActAbstract_7079"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DeferralOfAmiPlan" xlink:label="Locator_exc_DeferralOfAmiPlan_7080"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_EnergyInfrastructureModernizationActAbstract_7079" xlink:to="Locator_exc_DeferralOfAmiPlan_7080" order="21.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EnergyInfrastructureModernizationActAbstract" xlink:label="Locator_exc_EnergyInfrastructureModernizationActAbstract_7081"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DeferralOfAdditionalCapitalExpenditures" xlink:label="Locator_exc_DeferralOfAdditionalCapitalExpenditures_7082"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_EnergyInfrastructureModernizationActAbstract_7081" xlink:to="Locator_exc_DeferralOfAdditionalCapitalExpenditures_7082" order="22.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EnergyInfrastructureModernizationActAbstract" xlink:label="Locator_exc_EnergyInfrastructureModernizationActAbstract_7083"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FutureRevenueAdjustment" xlink:label="Locator_exc_FutureRevenueAdjustment_7084"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_EnergyInfrastructureModernizationActAbstract_7083" xlink:to="Locator_exc_FutureRevenueAdjustment_7084" order="23.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EnergyInfrastructureModernizationActAbstract" xlink:label="Locator_exc_EnergyInfrastructureModernizationActAbstract_7085"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CollarBasisPoints" xlink:label="Locator_exc_CollarBasisPoints_7086"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_EnergyInfrastructureModernizationActAbstract_7085" xlink:to="Locator_exc_CollarBasisPoints_7086" order="24.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EnergyInfrastructureModernizationActAbstract" xlink:label="Locator_exc_EnergyInfrastructureModernizationActAbstract_7087"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_TreasuryRatesUsedInRateOfReturn" xlink:label="Locator_exc_TreasuryRatesUsedInRateOfReturn_7088"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_EnergyInfrastructureModernizationActAbstract_7087" xlink:to="Locator_exc_TreasuryRatesUsedInRateOfReturn_7088" order="25.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EnergyInfrastructureModernizationActAbstract" xlink:label="Locator_exc_EnergyInfrastructureModernizationActAbstract_7089"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_UpperBoundResidentialRateIncrease" xlink:label="Locator_exc_UpperBoundResidentialRateIncrease_7090"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_EnergyInfrastructureModernizationActAbstract_7089" xlink:to="Locator_exc_UpperBoundResidentialRateIncrease_7090" order="26.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EnergyInfrastructureModernizationActAbstract" xlink:label="Locator_exc_EnergyInfrastructureModernizationActAbstract_7091"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FinalUpperBoundReductionOfBasisPoints" xlink:label="Locator_exc_FinalUpperBoundReductionOfBasisPoints_7092"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_EnergyInfrastructureModernizationActAbstract_7091" xlink:to="Locator_exc_FinalUpperBoundReductionOfBasisPoints_7092" order="27.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EnergyInfrastructureModernizationActAbstract" xlink:label="Locator_exc_EnergyInfrastructureModernizationActAbstract_7093"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_InitialUpperBoundReductionOfBasisPoints" xlink:label="Locator_exc_InitialUpperBoundReductionOfBasisPoints_7094"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_EnergyInfrastructureModernizationActAbstract_7093" xlink:to="Locator_exc_InitialUpperBoundReductionOfBasisPoints_7094" order="28.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EnergyInfrastructureModernizationActAbstract" xlink:label="Locator_exc_EnergyInfrastructureModernizationActAbstract_7095"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ExcessBasisPointsOverTreasuryYearOne" xlink:label="Locator_exc_ExcessBasisPointsOverTreasuryYearOne_7096"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_EnergyInfrastructureModernizationActAbstract_7095" xlink:to="Locator_exc_ExcessBasisPointsOverTreasuryYearOne_7096" order="29.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EnergyInfrastructureModernizationActAbstract" xlink:label="Locator_exc_EnergyInfrastructureModernizationActAbstract_7097"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ExcessBasisPointsOverTreasuryAfterYearOne" xlink:label="Locator_exc_ExcessBasisPointsOverTreasuryAfterYearOne_7098"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_EnergyInfrastructureModernizationActAbstract_7097" xlink:to="Locator_exc_ExcessBasisPointsOverTreasuryAfterYearOne_7098" order="30.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EnergyInfrastructureModernizationActAbstract" xlink:label="Locator_exc_EnergyInfrastructureModernizationActAbstract_7099"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AljRevenueReduction" xlink:label="Locator_exc_AljRevenueReduction_7100"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_EnergyInfrastructureModernizationActAbstract_7099" xlink:to="Locator_exc_AljRevenueReduction_7100" order="31.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EnergyInfrastructureModernizationActAbstract" xlink:label="Locator_exc_EnergyInfrastructureModernizationActAbstract_7101"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_UtilityRevenueReduction" xlink:label="Locator_exc_UtilityRevenueReduction_7102"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_EnergyInfrastructureModernizationActAbstract_7101" xlink:to="Locator_exc_UtilityRevenueReduction_7102" order="32.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EnergyInfrastructureModernizationActAbstract" xlink:label="Locator_exc_EnergyInfrastructureModernizationActAbstract_7103"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PortionOfOverUnderRecovery" xlink:label="Locator_exc_PortionOfOverUnderRecovery_7104"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_EnergyInfrastructureModernizationActAbstract_7103" xlink:to="Locator_exc_PortionOfOverUnderRecovery_7104" order="33.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EnergyInfrastructureModernizationActAbstract" xlink:label="Locator_exc_EnergyInfrastructureModernizationActAbstract_7105"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PortionOfOverUnderRecoveryChange" xlink:label="Locator_exc_PortionOfOverUnderRecoveryChange_7106"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_EnergyInfrastructureModernizationActAbstract_7105" xlink:to="Locator_exc_PortionOfOverUnderRecoveryChange_7106" order="34.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RegulatoryMattersAdditionalNarrativeInformationLineItems" xlink:label="Locator_exc_RegulatoryMattersAdditionalNarrativeInformationLineItems_7107"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_StateSettlementAgreementAbstract" xlink:label="Locator_exc_StateSettlementAgreementAbstract_7108"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_RegulatoryMattersAdditionalNarrativeInformationLineItems_7107" xlink:to="Locator_exc_StateSettlementAgreementAbstract_7108" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_StateSettlementAgreementAbstract" xlink:label="Locator_exc_StateSettlementAgreementAbstract_7109"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_TotalUtilitiesRateReliefContribution" xlink:label="Locator_exc_TotalUtilitiesRateReliefContribution_7110"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_StateSettlementAgreementAbstract_7109" xlink:to="Locator_exc_TotalUtilitiesRateReliefContribution_7110" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_StateSettlementAgreementAbstract" xlink:label="Locator_exc_StateSettlementAgreementAbstract_7111"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ComedRateReliefContribution" xlink:label="Locator_exc_ComedRateReliefContribution_7112"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_StateSettlementAgreementAbstract_7111" xlink:to="Locator_exc_ComedRateReliefContribution_7112" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_StateSettlementAgreementAbstract" xlink:label="Locator_exc_StateSettlementAgreementAbstract_7113"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_TotalStateUtilitiesRateReliefContribution" xlink:label="Locator_exc_TotalStateUtilitiesRateReliefContribution_7114"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_StateSettlementAgreementAbstract_7113" xlink:to="Locator_exc_TotalStateUtilitiesRateReliefContribution_7114" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_StateSettlementAgreementAbstract" xlink:label="Locator_exc_StateSettlementAgreementAbstract_7115"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PublicAuthorityContribution" xlink:label="Locator_exc_PublicAuthorityContribution_7116"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_StateSettlementAgreementAbstract_7115" xlink:to="Locator_exc_PublicAuthorityContribution_7116" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_StateSettlementAgreementAbstract" xlink:label="Locator_exc_StateSettlementAgreementAbstract_7117"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AnnualEnergySavings" xlink:label="Locator_exc_AnnualEnergySavings_7118"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_StateSettlementAgreementAbstract_7117" xlink:to="Locator_exc_AnnualEnergySavings_7118" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_StateSettlementAgreementAbstract" xlink:label="Locator_exc_StateSettlementAgreementAbstract_7119"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AnnualDemandResponseReduction" xlink:label="Locator_exc_AnnualDemandResponseReduction_7120"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_StateSettlementAgreementAbstract_7119" xlink:to="Locator_exc_AnnualDemandResponseReduction_7120" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_StateSettlementAgreementAbstract" xlink:label="Locator_exc_StateSettlementAgreementAbstract_7121"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AnnualRenewableEnergyProcurement" xlink:label="Locator_exc_AnnualRenewableEnergyProcurement_7122"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_StateSettlementAgreementAbstract_7121" xlink:to="Locator_exc_AnnualRenewableEnergyProcurement_7122" order="7.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RegulatoryMattersAdditionalNarrativeInformationLineItems" xlink:label="Locator_exc_RegulatoryMattersAdditionalNarrativeInformationLineItems_7123"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DistributionRateCaseAbstract" xlink:label="Locator_exc_DistributionRateCaseAbstract_7124"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_RegulatoryMattersAdditionalNarrativeInformationLineItems_7123" xlink:to="Locator_exc_DistributionRateCaseAbstract_7124" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DistributionRateCaseAbstract" xlink:label="Locator_exc_DistributionRateCaseAbstract_7125"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OneTimeBenefitResultingFromRequestedReversalOfPriorCharges" xlink:label="Locator_exc_OneTimeBenefitResultingFromRequestedReversalOfPriorCharges_7126"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_DistributionRateCaseAbstract_7125" xlink:to="Locator_exc_OneTimeBenefitResultingFromRequestedReversalOfPriorCharges_7126" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DistributionRateCaseAbstract" xlink:label="Locator_exc_DistributionRateCaseAbstract_7127"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ElectricRevenuesIncreaseRequested" xlink:label="Locator_exc_ElectricRevenuesIncreaseRequested_7128"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_DistributionRateCaseAbstract_7127" xlink:to="Locator_exc_ElectricRevenuesIncreaseRequested_7128" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DistributionRateCaseAbstract" xlink:label="Locator_exc_DistributionRateCaseAbstract_7129"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SurrebuttalIncreaseAnnualRevenueRequirementNet" xlink:label="Locator_exc_SurrebuttalIncreaseAnnualRevenueRequirementNet_7130"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_DistributionRateCaseAbstract_7129" xlink:to="Locator_exc_SurrebuttalIncreaseAnnualRevenueRequirementNet_7130" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DistributionRateCaseAbstract" xlink:label="Locator_exc_DistributionRateCaseAbstract_7131"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AdjustmentToElectricRevenuesIncreaseRequested" xlink:label="Locator_exc_AdjustmentToElectricRevenuesIncreaseRequested_7132"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_DistributionRateCaseAbstract_7131" xlink:to="Locator_exc_AdjustmentToElectricRevenuesIncreaseRequested_7132" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DistributionRateCaseAbstract" xlink:label="Locator_exc_DistributionRateCaseAbstract_7133"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RequestRecoveryAdvancedMeteringInfrastructurePilotProgramExpense" xlink:label="Locator_exc_RequestRecoveryAdvancedMeteringInfrastructurePilotProgramExpense_7134"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_DistributionRateCaseAbstract_7133" xlink:to="Locator_exc_RequestRecoveryAdvancedMeteringInfrastructurePilotProgramExpense_7134" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DistributionRateCaseAbstract" xlink:label="Locator_exc_DistributionRateCaseAbstract_7135"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_GasRevenuesIncreaseRequested" xlink:label="Locator_exc_GasRevenuesIncreaseRequested_7136"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_DistributionRateCaseAbstract_7135" xlink:to="Locator_exc_GasRevenuesIncreaseRequested_7136" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DistributionRateCaseAbstract" xlink:label="Locator_exc_DistributionRateCaseAbstract_7137"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RequestedRateOfReturnCommonEquity" xlink:label="Locator_exc_RequestedRateOfReturnCommonEquity_7138"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_DistributionRateCaseAbstract_7137" xlink:to="Locator_exc_RequestedRateOfReturnCommonEquity_7138" order="7.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DistributionRateCaseAbstract" xlink:label="Locator_exc_DistributionRateCaseAbstract_7139"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RateOfReturnCommonEquityElectricDistribution" xlink:label="Locator_exc_RateOfReturnCommonEquityElectricDistribution_7140"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_DistributionRateCaseAbstract_7139" xlink:to="Locator_exc_RateOfReturnCommonEquityElectricDistribution_7140" order="8.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DistributionRateCaseAbstract" xlink:label="Locator_exc_DistributionRateCaseAbstract_7141"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_MaximumPotentialRefundSubmittedInTestimony" xlink:label="Locator_exc_MaximumPotentialRefundSubmittedInTestimony_7142"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_DistributionRateCaseAbstract_7141" xlink:to="Locator_exc_MaximumPotentialRefundSubmittedInTestimony_7142" order="9.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DistributionRateCaseAbstract" xlink:label="Locator_exc_DistributionRateCaseAbstract_7143"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_IntervenorPotentialRefundSubmittedInTestimony" xlink:label="Locator_exc_IntervenorPotentialRefundSubmittedInTestimony_7144"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_DistributionRateCaseAbstract_7143" xlink:to="Locator_exc_IntervenorPotentialRefundSubmittedInTestimony_7144" order="10.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DistributionRateCaseAbstract" xlink:label="Locator_exc_DistributionRateCaseAbstract_7145"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ElectricDeliveryRateIncrease" xlink:label="Locator_exc_ElectricDeliveryRateIncrease_7146"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_DistributionRateCaseAbstract_7145" xlink:to="Locator_exc_ElectricDeliveryRateIncrease_7146" order="11.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DistributionRateCaseAbstract" xlink:label="Locator_exc_DistributionRateCaseAbstract_7147"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ElectricRevenuesIncreaseSettlement" xlink:label="Locator_exc_ElectricRevenuesIncreaseSettlement_7148"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_DistributionRateCaseAbstract_7147" xlink:to="Locator_exc_ElectricRevenuesIncreaseSettlement_7148" order="12.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DistributionRateCaseAbstract" xlink:label="Locator_exc_DistributionRateCaseAbstract_7149"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_GasRevenuesIncreaseSettlement" xlink:label="Locator_exc_GasRevenuesIncreaseSettlement_7150"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_DistributionRateCaseAbstract_7149" xlink:to="Locator_exc_GasRevenuesIncreaseSettlement_7150" order="13.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DistributionRateCaseAbstract" xlink:label="Locator_exc_DistributionRateCaseAbstract_7151"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NetDistributionRevenueRequirementIncreaseForUncollectableAccountExpense" xlink:label="Locator_exc_NetDistributionRevenueRequirementIncreaseForUncollectableAccountExpense_7152"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_DistributionRateCaseAbstract_7151" xlink:to="Locator_exc_NetDistributionRevenueRequirementIncreaseForUncollectableAccountExpense_7152" order="14.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DistributionRateCaseAbstract" xlink:label="Locator_exc_DistributionRateCaseAbstract_7153"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SeveranceRegulatoryAssetsNoncurrent" xlink:label="Locator_exc_SeveranceRegulatoryAssetsNoncurrent_7154"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_DistributionRateCaseAbstract_7153" xlink:to="Locator_exc_SeveranceRegulatoryAssetsNoncurrent_7154" order="15.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DistributionRateCaseAbstract" xlink:label="Locator_exc_DistributionRateCaseAbstract_7155"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ReplyBriefIncreaseAnnualRevenueRequirementNet" xlink:label="Locator_exc_ReplyBriefIncreaseAnnualRevenueRequirementNet_7156"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_DistributionRateCaseAbstract_7155" xlink:to="Locator_exc_ReplyBriefIncreaseAnnualRevenueRequirementNet_7156" order="16.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DistributionRateCaseAbstract" xlink:label="Locator_exc_DistributionRateCaseAbstract_7157"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ElectricRevenuesIncreaseProposedOrder" xlink:label="Locator_exc_ElectricRevenuesIncreaseProposedOrder_7158"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_DistributionRateCaseAbstract_7157" xlink:to="Locator_exc_ElectricRevenuesIncreaseProposedOrder_7158" order="17.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DistributionRateCaseAbstract" xlink:label="Locator_exc_DistributionRateCaseAbstract_7159"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ProposedRateOfReturnCommonEquity" xlink:label="Locator_exc_ProposedRateOfReturnCommonEquity_7160"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_DistributionRateCaseAbstract_7159" xlink:to="Locator_exc_ProposedRateOfReturnCommonEquity_7160" order="18.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DistributionRateCaseAbstract" xlink:label="Locator_exc_DistributionRateCaseAbstract_7161"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ElectricDistributionTaxRepairs" xlink:label="Locator_exc_ElectricDistributionTaxRepairs_7162"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_DistributionRateCaseAbstract_7161" xlink:to="Locator_exc_ElectricDistributionTaxRepairs_7162" order="19.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RegulatoryMattersAdditionalNarrativeInformationLineItems" xlink:label="Locator_exc_RegulatoryMattersAdditionalNarrativeInformationLineItems_7163"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_Illinois2007ElectricDistributionRateCaseAppealAbstract" xlink:label="Locator_exc_Illinois2007ElectricDistributionRateCaseAppealAbstract_7164"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_RegulatoryMattersAdditionalNarrativeInformationLineItems_7163" xlink:to="Locator_exc_Illinois2007ElectricDistributionRateCaseAppealAbstract_7164" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_Illinois2007ElectricDistributionRateCaseAppealAbstract" xlink:label="Locator_exc_Illinois2007ElectricDistributionRateCaseAppealAbstract_7165"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ElectricRevenuesIncreaseOrder" xlink:label="Locator_exc_ElectricRevenuesIncreaseOrder_7166"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_Illinois2007ElectricDistributionRateCaseAppealAbstract_7165" xlink:to="Locator_exc_ElectricRevenuesIncreaseOrder_7166" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_Illinois2007ElectricDistributionRateCaseAppealAbstract" xlink:label="Locator_exc_Illinois2007ElectricDistributionRateCaseAppealAbstract_7167"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_UtilitiesOperatingExpenseMaintenanceAndOperationsOneTimeRegulatoryWriteOff" xlink:label="Locator_exc_UtilitiesOperatingExpenseMaintenanceAndOperationsOneTimeRegulatoryWriteOff_7168"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_Illinois2007ElectricDistributionRateCaseAppealAbstract_7167" xlink:to="Locator_exc_UtilitiesOperatingExpenseMaintenanceAndOperationsOneTimeRegulatoryWriteOff_7168" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_Illinois2007ElectricDistributionRateCaseAppealAbstract" xlink:label="Locator_exc_Illinois2007ElectricDistributionRateCaseAppealAbstract_7169"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SmartMetersInstalled" xlink:label="Locator_exc_SmartMetersInstalled_7170"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_Illinois2007ElectricDistributionRateCaseAppealAbstract_7169" xlink:to="Locator_exc_SmartMetersInstalled_7170" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_Illinois2007ElectricDistributionRateCaseAppealAbstract" xlink:label="Locator_exc_Illinois2007ElectricDistributionRateCaseAppealAbstract_7171"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EstimatedRefundObligationToCustomers" xlink:label="Locator_exc_EstimatedRefundObligationToCustomers_7172"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_Illinois2007ElectricDistributionRateCaseAppealAbstract_7171" xlink:to="Locator_exc_EstimatedRefundObligationToCustomers_7172" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_Illinois2007ElectricDistributionRateCaseAppealAbstract" xlink:label="Locator_exc_Illinois2007ElectricDistributionRateCaseAppealAbstract_7173"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ReclassificationOfRegulatoryAssets" xlink:label="Locator_exc_ReclassificationOfRegulatoryAssets_7174"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_Illinois2007ElectricDistributionRateCaseAppealAbstract_7173" xlink:to="Locator_exc_ReclassificationOfRegulatoryAssets_7174" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_Illinois2007ElectricDistributionRateCaseAppealAbstract" xlink:label="Locator_exc_Illinois2007ElectricDistributionRateCaseAppealAbstract_7175"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AdditionalMonthsDepreciation" xlink:label="Locator_exc_AdditionalMonthsDepreciation_7176"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_Illinois2007ElectricDistributionRateCaseAppealAbstract_7175" xlink:to="Locator_exc_AdditionalMonthsDepreciation_7176" order="7.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RegulatoryMattersAdditionalNarrativeInformationLineItems" xlink:label="Locator_exc_RegulatoryMattersAdditionalNarrativeInformationLineItems_7177"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ConsolidatedBillingAndPurchaseOfReceivablesAbstract" xlink:label="Locator_exc_ConsolidatedBillingAndPurchaseOfReceivablesAbstract_7178"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_RegulatoryMattersAdditionalNarrativeInformationLineItems_7177" xlink:to="Locator_exc_ConsolidatedBillingAndPurchaseOfReceivablesAbstract_7178" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ConsolidatedBillingAndPurchaseOfReceivablesAbstract" xlink:label="Locator_exc_ConsolidatedBillingAndPurchaseOfReceivablesAbstract_7179"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PurchasedAccountsReceivablesForPorcb" xlink:label="Locator_exc_PurchasedAccountsReceivablesForPorcb_7180"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_ConsolidatedBillingAndPurchaseOfReceivablesAbstract_7179" xlink:to="Locator_exc_PurchasedAccountsReceivablesForPorcb_7180" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RegulatoryMattersAdditionalNarrativeInformationLineItems" xlink:label="Locator_exc_RegulatoryMattersAdditionalNarrativeInformationLineItems_7181"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_IllinoisProcurementProceedingsAbstract" xlink:label="Locator_exc_IllinoisProcurementProceedingsAbstract_7182"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_RegulatoryMattersAdditionalNarrativeInformationLineItems_7181" xlink:to="Locator_exc_IllinoisProcurementProceedingsAbstract_7182" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_IllinoisProcurementProceedingsAbstract" xlink:label="Locator_exc_IllinoisProcurementProceedingsAbstract_7183"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RevenueSubjectToRefundReversal" xlink:label="Locator_exc_RevenueSubjectToRefundReversal_7184"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_IllinoisProcurementProceedingsAbstract_7183" xlink:to="Locator_exc_RevenueSubjectToRefundReversal_7184" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_IllinoisProcurementProceedingsAbstract" xlink:label="Locator_exc_IllinoisProcurementProceedingsAbstract_7185"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_LengthOfLongTermRenewableContracts" xlink:label="Locator_exc_LengthOfLongTermRenewableContracts_7186"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_IllinoisProcurementProceedingsAbstract_7185" xlink:to="Locator_exc_LengthOfLongTermRenewableContracts_7186" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RegulatoryMattersAdditionalNarrativeInformationLineItems" xlink:label="Locator_exc_RegulatoryMattersAdditionalNarrativeInformationLineItems_7187"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_UncollectibleAccountsAbstract" xlink:label="Locator_exc_UncollectibleAccountsAbstract_7188"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_RegulatoryMattersAdditionalNarrativeInformationLineItems_7187" xlink:to="Locator_exc_UncollectibleAccountsAbstract_7188" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_UncollectibleAccountsAbstract" xlink:label="Locator_exc_UncollectibleAccountsAbstract_7189"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_InitialRegulatoryAssetUncollectibleAccounts" xlink:label="Locator_exc_InitialRegulatoryAssetUncollectibleAccounts_7190"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_UncollectibleAccountsAbstract_7189" xlink:to="Locator_exc_InitialRegulatoryAssetUncollectibleAccounts_7190" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_UncollectibleAccountsAbstract" xlink:label="Locator_exc_UncollectibleAccountsAbstract_7191"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_UtilitiesOperatingExpenseMaintenanceAndOperationsOneTimeCharge" xlink:label="Locator_exc_UtilitiesOperatingExpenseMaintenanceAndOperationsOneTimeCharge_7192"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_UncollectibleAccountsAbstract_7191" xlink:to="Locator_exc_UtilitiesOperatingExpenseMaintenanceAndOperationsOneTimeCharge_7192" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RegulatoryMattersAdditionalNarrativeInformationLineItems" xlink:label="Locator_exc_RegulatoryMattersAdditionalNarrativeInformationLineItems_7193"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AnnualTransmissionFormulaRateUpdateAbstract" xlink:label="Locator_exc_AnnualTransmissionFormulaRateUpdateAbstract_7194"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_RegulatoryMattersAdditionalNarrativeInformationLineItems_7193" xlink:to="Locator_exc_AnnualTransmissionFormulaRateUpdateAbstract_7194" order="7.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AnnualTransmissionFormulaRateUpdateAbstract" xlink:label="Locator_exc_AnnualTransmissionFormulaRateUpdateAbstract_7195"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_GrossTransmissionRevenueRequirement" xlink:label="Locator_exc_GrossTransmissionRevenueRequirement_7196"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_AnnualTransmissionFormulaRateUpdateAbstract_7195" xlink:to="Locator_exc_GrossTransmissionRevenueRequirement_7196" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AnnualTransmissionFormulaRateUpdateAbstract" xlink:label="Locator_exc_AnnualTransmissionFormulaRateUpdateAbstract_7197"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_TransmissionRevenueTrueUp" xlink:label="Locator_exc_TransmissionRevenueTrueUp_7198"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_AnnualTransmissionFormulaRateUpdateAbstract_7197" xlink:to="Locator_exc_TransmissionRevenueTrueUp_7198" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AnnualTransmissionFormulaRateUpdateAbstract" xlink:label="Locator_exc_AnnualTransmissionFormulaRateUpdateAbstract_7199"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NetTransmissionRevenueRequirement" xlink:label="Locator_exc_NetTransmissionRevenueRequirement_7200"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_AnnualTransmissionFormulaRateUpdateAbstract_7199" xlink:to="Locator_exc_NetTransmissionRevenueRequirement_7200" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RegulatoryMattersAdditionalNarrativeInformationLineItems" xlink:label="Locator_exc_RegulatoryMattersAdditionalNarrativeInformationLineItems_7201"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PjmTransmissionRateDesignAndOperatingAgreementsAbstract" xlink:label="Locator_exc_PjmTransmissionRateDesignAndOperatingAgreementsAbstract_7202"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_RegulatoryMattersAdditionalNarrativeInformationLineItems_7201" xlink:to="Locator_exc_PjmTransmissionRateDesignAndOperatingAgreementsAbstract_7202" order="8.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PjmTransmissionRateDesignAndOperatingAgreementsAbstract" xlink:label="Locator_exc_PjmTransmissionRateDesignAndOperatingAgreementsAbstract_7203"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RegulatoryConstructionCommitments" xlink:label="Locator_exc_RegulatoryConstructionCommitments_7204"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_PjmTransmissionRateDesignAndOperatingAgreementsAbstract_7203" xlink:to="Locator_exc_RegulatoryConstructionCommitments_7204" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RegulatoryMattersAdditionalNarrativeInformationLineItems" xlink:label="Locator_exc_RegulatoryMattersAdditionalNarrativeInformationLineItems_7205"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PjmMinimumOfferPriceRuleAbstract" xlink:label="Locator_exc_PjmMinimumOfferPriceRuleAbstract_7206"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_RegulatoryMattersAdditionalNarrativeInformationLineItems_7205" xlink:to="Locator_exc_PjmMinimumOfferPriceRuleAbstract_7206" order="9.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PjmMinimumOfferPriceRuleAbstract" xlink:label="Locator_exc_PjmMinimumOfferPriceRuleAbstract_7207"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SubsidizedPlantMinimumBid" xlink:label="Locator_exc_SubsidizedPlantMinimumBid_7208"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_PjmMinimumOfferPriceRuleAbstract_7207" xlink:to="Locator_exc_SubsidizedPlantMinimumBid_7208" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RegulatoryMattersAdditionalNarrativeInformationLineItems" xlink:label="Locator_exc_RegulatoryMattersAdditionalNarrativeInformationLineItems_7209"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SmartMeterSmartGridAbstract" xlink:label="Locator_exc_SmartMeterSmartGridAbstract_7210"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_RegulatoryMattersAdditionalNarrativeInformationLineItems_7209" xlink:to="Locator_exc_SmartMeterSmartGridAbstract_7210" order="10.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SmartMeterSmartGridAbstract" xlink:label="Locator_exc_SmartMeterSmartGridAbstract_7211"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EstimatedSmartMeters" xlink:label="Locator_exc_EstimatedSmartMeters_7212"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_SmartMeterSmartGridAbstract_7211" xlink:to="Locator_exc_EstimatedSmartMeters_7212" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SmartMeterSmartGridAbstract" xlink:label="Locator_exc_SmartMeterSmartGridAbstract_7213"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SmartMetersInitialPhaseDeployment" xlink:label="Locator_exc_SmartMetersInitialPhaseDeployment_7214"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_SmartMeterSmartGridAbstract_7213" xlink:to="Locator_exc_SmartMetersInitialPhaseDeployment_7214" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SmartMeterSmartGridAbstract" xlink:label="Locator_exc_SmartMeterSmartGridAbstract_7215"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EstimatedSmartMeterPlanInvestment" xlink:label="Locator_exc_EstimatedSmartMeterPlanInvestment_7216"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_SmartMeterSmartGridAbstract_7215" xlink:to="Locator_exc_EstimatedSmartMeterPlanInvestment_7216" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SmartMeterSmartGridAbstract" xlink:label="Locator_exc_SmartMeterSmartGridAbstract_7217"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EstimatedFirstPhaseSmartMeterPlanInvestment" xlink:label="Locator_exc_EstimatedFirstPhaseSmartMeterPlanInvestment_7218"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_SmartMeterSmartGridAbstract_7217" xlink:to="Locator_exc_EstimatedFirstPhaseSmartMeterPlanInvestment_7218" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SmartMeterSmartGridAbstract" xlink:label="Locator_exc_SmartMeterSmartGridAbstract_7219"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SmartGridInvestmentGrantAwarded" xlink:label="Locator_exc_SmartGridInvestmentGrantAwarded_7220"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_SmartMeterSmartGridAbstract_7219" xlink:to="Locator_exc_SmartGridInvestmentGrantAwarded_7220" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SmartMeterSmartGridAbstract" xlink:label="Locator_exc_SmartMeterSmartGridAbstract_7221"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SmartGridGrantAwardedUtilizedFirstPhase" xlink:label="Locator_exc_SmartGridGrantAwardedUtilizedFirstPhase_7222"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_SmartMeterSmartGridAbstract_7221" xlink:to="Locator_exc_SmartGridGrantAwardedUtilizedFirstPhase_7222" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SmartMeterSmartGridAbstract" xlink:label="Locator_exc_SmartMeterSmartGridAbstract_7223"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_InitialSmartMetersDeployed" xlink:label="Locator_exc_InitialSmartMetersDeployed_7224"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_SmartMeterSmartGridAbstract_7223" xlink:to="Locator_exc_InitialSmartMetersDeployed_7224" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SmartMeterSmartGridAbstract" xlink:label="Locator_exc_SmartMeterSmartGridAbstract_7225"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ReplacementOfInstalledSmartMeters" xlink:label="Locator_exc_ReplacementOfInstalledSmartMeters_7226"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_SmartMeterSmartGridAbstract_7225" xlink:to="Locator_exc_ReplacementOfInstalledSmartMeters_7226" order="7.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SmartMeterSmartGridAbstract" xlink:label="Locator_exc_SmartMeterSmartGridAbstract_7227"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SmartMeterInvestmentReturn" xlink:label="Locator_exc_SmartMeterInvestmentReturn_7228"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_SmartMeterSmartGridAbstract_7227" xlink:to="Locator_exc_SmartMeterInvestmentReturn_7228" order="8.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SmartMeterSmartGridAbstract" xlink:label="Locator_exc_SmartMeterSmartGridAbstract_7229"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SmartGridInvestment" xlink:label="Locator_exc_SmartGridInvestment_7230"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_SmartMeterSmartGridAbstract_7229" xlink:to="Locator_exc_SmartGridInvestment_7230" order="9.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SmartMeterSmartGridAbstract" xlink:label="Locator_exc_SmartMeterSmartGridAbstract_7231"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SmartGridSubRecipientInvestment" xlink:label="Locator_exc_SmartGridSubRecipientInvestment_7232"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_SmartMeterSmartGridAbstract_7231" xlink:to="Locator_exc_SmartGridSubRecipientInvestment_7232" order="10.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SmartMeterSmartGridAbstract" xlink:label="Locator_exc_SmartMeterSmartGridAbstract_7233"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ReimbursableInvestmentGrantExpenditures" xlink:label="Locator_exc_ReimbursableInvestmentGrantExpenditures_7234"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_SmartMeterSmartGridAbstract_7233" xlink:to="Locator_exc_ReimbursableInvestmentGrantExpenditures_7234" order="11.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SmartMeterSmartGridAbstract" xlink:label="Locator_exc_SmartMeterSmartGridAbstract_7235"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DoeReimbursements" xlink:label="Locator_exc_DoeReimbursements_7236"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_SmartMeterSmartGridAbstract_7235" xlink:to="Locator_exc_DoeReimbursements_7236" order="12.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SmartMeterSmartGridAbstract" xlink:label="Locator_exc_SmartMeterSmartGridAbstract_7237"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CarryingValueOfSmartMetersExcludingDoeReimbursements" xlink:label="Locator_exc_CarryingValueOfSmartMetersExcludingDoeReimbursements_7238"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_SmartMeterSmartGridAbstract_7237" xlink:to="Locator_exc_CarryingValueOfSmartMetersExcludingDoeReimbursements_7238" order="13.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SmartMeterSmartGridAbstract" xlink:label="Locator_exc_SmartMeterSmartGridAbstract_7239"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DoeReimbursementsUseForOriginalMeterInstallment" xlink:label="Locator_exc_DoeReimbursementsUseForOriginalMeterInstallment_7240"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_SmartMeterSmartGridAbstract_7239" xlink:to="Locator_exc_DoeReimbursementsUseForOriginalMeterInstallment_7240" order="14.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SmartMeterSmartGridAbstract" xlink:label="Locator_exc_SmartMeterSmartGridAbstract_7241"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_TotalProjectSmartMeterSmartGridSpend" xlink:label="Locator_exc_TotalProjectSmartMeterSmartGridSpend_7242"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_SmartMeterSmartGridAbstract_7241" xlink:to="Locator_exc_TotalProjectSmartMeterSmartGridSpend_7242" order="15.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RegulatoryMattersAdditionalNarrativeInformationLineItems" xlink:label="Locator_exc_RegulatoryMattersAdditionalNarrativeInformationLineItems_7243"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NewElectricGenerationAbstract" xlink:label="Locator_exc_NewElectricGenerationAbstract_7244"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_RegulatoryMattersAdditionalNarrativeInformationLineItems_7243" xlink:to="Locator_exc_NewElectricGenerationAbstract_7244" order="11.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NewElectricGenerationAbstract" xlink:label="Locator_exc_NewElectricGenerationAbstract_7245"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_MagawattCapacityGeneratingPlantUnderContractForDifferences" xlink:label="Locator_exc_MagawattCapacityGeneratingPlantUnderContractForDifferences_7246"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_NewElectricGenerationAbstract_7245" xlink:to="Locator_exc_MagawattCapacityGeneratingPlantUnderContractForDifferences_7246" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RegulatoryMattersAdditionalNarrativeInformationLineItems" xlink:label="Locator_exc_RegulatoryMattersAdditionalNarrativeInformationLineItems_7247"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EnergyEfficiencyProgramsAbstract" xlink:label="Locator_exc_EnergyEfficiencyProgramsAbstract_7248"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_RegulatoryMattersAdditionalNarrativeInformationLineItems_7247" xlink:to="Locator_exc_EnergyEfficiencyProgramsAbstract_7248" order="12.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EnergyEfficiencyProgramsAbstract" xlink:label="Locator_exc_EnergyEfficiencyProgramsAbstract_7249"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_MaximumCivilPenaltyEnergyEfficiencyProgram" xlink:label="Locator_exc_MaximumCivilPenaltyEnergyEfficiencyProgram_7250"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_EnergyEfficiencyProgramsAbstract_7249" xlink:to="Locator_exc_MaximumCivilPenaltyEnergyEfficiencyProgram_7250" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EnergyEfficiencyProgramsAbstract" xlink:label="Locator_exc_EnergyEfficiencyProgramsAbstract_7251"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EnergyEfficiencyAndConservationDemandPlanApproved" xlink:label="Locator_exc_EnergyEfficiencyAndConservationDemandPlanApproved_7252"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_EnergyEfficiencyProgramsAbstract_7251" xlink:to="Locator_exc_EnergyEfficiencyAndConservationDemandPlanApproved_7252" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EnergyEfficiencyProgramsAbstract" xlink:label="Locator_exc_EnergyEfficiencyProgramsAbstract_7253"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EnergyEfficiencyTwoThousandElevenComplianceTarget" xlink:label="Locator_exc_EnergyEfficiencyTwoThousandElevenComplianceTarget_7254"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_EnergyEfficiencyProgramsAbstract_7253" xlink:to="Locator_exc_EnergyEfficiencyTwoThousandElevenComplianceTarget_7254" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EnergyEfficiencyProgramsAbstract" xlink:label="Locator_exc_EnergyEfficiencyProgramsAbstract_7255"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CumulativeConsumptionReductionTargets" xlink:label="Locator_exc_CumulativeConsumptionReductionTargets_7256"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_EnergyEfficiencyProgramsAbstract_7255" xlink:to="Locator_exc_CumulativeConsumptionReductionTargets_7256" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EnergyEfficiencyProgramsAbstract" xlink:label="Locator_exc_EnergyEfficiencyProgramsAbstract_7257"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_LowIncomeSectorConsumptionReductionTargetsAct129PhaseIi" xlink:label="Locator_exc_LowIncomeSectorConsumptionReductionTargetsAct129PhaseIi_7258"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_EnergyEfficiencyProgramsAbstract_7257" xlink:to="Locator_exc_LowIncomeSectorConsumptionReductionTargetsAct129PhaseIi_7258" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EnergyEfficiencyProgramsAbstract" xlink:label="Locator_exc_EnergyEfficiencyProgramsAbstract_7259"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PublicSectorMaximumConsumptionReductionTargetsAct129PhaseIi" xlink:label="Locator_exc_PublicSectorMaximumConsumptionReductionTargetsAct129PhaseIi_7260"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_EnergyEfficiencyProgramsAbstract_7259" xlink:to="Locator_exc_PublicSectorMaximumConsumptionReductionTargetsAct129PhaseIi_7260" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EnergyEfficiencyProgramsAbstract" xlink:label="Locator_exc_EnergyEfficiencyProgramsAbstract_7261"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_TotalPlanCostAct129PhaseIi" xlink:label="Locator_exc_TotalPlanCostAct129PhaseIi_7262"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_EnergyEfficiencyProgramsAbstract_7261" xlink:to="Locator_exc_TotalPlanCostAct129PhaseIi_7262" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RegulatoryMattersAdditionalNarrativeInformationLineItems" xlink:label="Locator_exc_RegulatoryMattersAdditionalNarrativeInformationLineItems_7263"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AdvancedMeteringProgramAbstract" xlink:label="Locator_exc_AdvancedMeteringProgramAbstract_7264"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_RegulatoryMattersAdditionalNarrativeInformationLineItems_7263" xlink:to="Locator_exc_AdvancedMeteringProgramAbstract_7264" order="13.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AdvancedMeteringProgramAbstract" xlink:label="Locator_exc_AdvancedMeteringProgramAbstract_7265"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CollectionsUnderRiderAmp" xlink:label="Locator_exc_CollectionsUnderRiderAmp_7266"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_AdvancedMeteringProgramAbstract_7265" xlink:to="Locator_exc_CollectionsUnderRiderAmp_7266" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RegulatoryMattersAdditionalNarrativeInformationLineItems" xlink:label="Locator_exc_RegulatoryMattersAdditionalNarrativeInformationLineItems_7267"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AlternativeEnergyPortfolioStandardsAbstract" xlink:label="Locator_exc_AlternativeEnergyPortfolioStandardsAbstract_7268"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_RegulatoryMattersAdditionalNarrativeInformationLineItems_7267" xlink:to="Locator_exc_AlternativeEnergyPortfolioStandardsAbstract_7268" order="14.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AlternativeEnergyPortfolioStandardsAbstract" xlink:label="Locator_exc_AlternativeEnergyPortfolioStandardsAbstract_7269"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_MinimumTierOnePercentageRequirement" xlink:label="Locator_exc_MinimumTierOnePercentageRequirement_7270"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_AlternativeEnergyPortfolioStandardsAbstract_7269" xlink:to="Locator_exc_MinimumTierOnePercentageRequirement_7270" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AlternativeEnergyPortfolioStandardsAbstract" xlink:label="Locator_exc_AlternativeEnergyPortfolioStandardsAbstract_7271"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_MaximumTierOnePercentageRequirement" xlink:label="Locator_exc_MaximumTierOnePercentageRequirement_7272"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_AlternativeEnergyPortfolioStandardsAbstract_7271" xlink:to="Locator_exc_MaximumTierOnePercentageRequirement_7272" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AlternativeEnergyPortfolioStandardsAbstract" xlink:label="Locator_exc_AlternativeEnergyPortfolioStandardsAbstract_7273"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_MinimumTierTwoPercentageRequirement" xlink:label="Locator_exc_MinimumTierTwoPercentageRequirement_7274"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_AlternativeEnergyPortfolioStandardsAbstract_7273" xlink:to="Locator_exc_MinimumTierTwoPercentageRequirement_7274" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AlternativeEnergyPortfolioStandardsAbstract" xlink:label="Locator_exc_AlternativeEnergyPortfolioStandardsAbstract_7275"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_MaximumTierTwoPercentageRequirement" xlink:label="Locator_exc_MaximumTierTwoPercentageRequirement_7276"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_AlternativeEnergyPortfolioStandardsAbstract_7275" xlink:to="Locator_exc_MaximumTierTwoPercentageRequirement_7276" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AlternativeEnergyPortfolioStandardsAbstract" xlink:label="Locator_exc_AlternativeEnergyPortfolioStandardsAbstract_7277"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AlternativeEnergyCreditsPurchasedAnnually" xlink:label="Locator_exc_AlternativeEnergyCreditsPurchasedAnnually_7278"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_AlternativeEnergyPortfolioStandardsAbstract_7277" xlink:to="Locator_exc_AlternativeEnergyCreditsPurchasedAnnually_7278" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AlternativeEnergyPortfolioStandardsAbstract" xlink:label="Locator_exc_AlternativeEnergyPortfolioStandardsAbstract_7279"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SolarTierOneAlternativeEnergyCreditsPurchasedAnnually" xlink:label="Locator_exc_SolarTierOneAlternativeEnergyCreditsPurchasedAnnually_7280"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_AlternativeEnergyPortfolioStandardsAbstract_7279" xlink:to="Locator_exc_SolarTierOneAlternativeEnergyCreditsPurchasedAnnually_7280" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AlternativeEnergyPortfolioStandardsAbstract" xlink:label="Locator_exc_AlternativeEnergyPortfolioStandardsAbstract_7281"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_TierIiAecsPurchased" xlink:label="Locator_exc_TierIiAecsPurchased_7282"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_AlternativeEnergyPortfolioStandardsAbstract_7281" xlink:to="Locator_exc_TierIiAecsPurchased_7282" order="7.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RegulatoryMattersAdditionalNarrativeInformationLineItems" xlink:label="Locator_exc_RegulatoryMattersAdditionalNarrativeInformationLineItems_7283"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NaturalGasDistributionRateCaseAbstract" xlink:label="Locator_exc_NaturalGasDistributionRateCaseAbstract_7284"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_RegulatoryMattersAdditionalNarrativeInformationLineItems_7283" xlink:to="Locator_exc_NaturalGasDistributionRateCaseAbstract_7284" order="15.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NaturalGasDistributionRateCaseAbstract" xlink:label="Locator_exc_NaturalGasDistributionRateCaseAbstract_7285"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_GasDistributionTaxRepairsRefund" xlink:label="Locator_exc_GasDistributionTaxRepairsRefund_7286"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_NaturalGasDistributionRateCaseAbstract_7285" xlink:to="Locator_exc_GasDistributionTaxRepairsRefund_7286" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RegulatoryMattersAdditionalNarrativeInformationLineItems" xlink:label="Locator_exc_RegulatoryMattersAdditionalNarrativeInformationLineItems_7287"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AuthorizedReturnOnRateBaseAbstract" xlink:label="Locator_exc_AuthorizedReturnOnRateBaseAbstract_7288"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_RegulatoryMattersAdditionalNarrativeInformationLineItems_7287" xlink:to="Locator_exc_AuthorizedReturnOnRateBaseAbstract_7288" order="16.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AuthorizedReturnOnRateBaseAbstract" xlink:label="Locator_exc_AuthorizedReturnOnRateBaseAbstract_7289"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_WeightedAverageDebtAndEquityReturnElectricDistribution" xlink:label="Locator_exc_WeightedAverageDebtAndEquityReturnElectricDistribution_7290"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_AuthorizedReturnOnRateBaseAbstract_7289" xlink:to="Locator_exc_WeightedAverageDebtAndEquityReturnElectricDistribution_7290" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AuthorizedReturnOnRateBaseAbstract" xlink:label="Locator_exc_AuthorizedReturnOnRateBaseAbstract_7291"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_WeightedAverageDebtAndEquityReturn" xlink:label="Locator_exc_WeightedAverageDebtAndEquityReturn_7292"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_AuthorizedReturnOnRateBaseAbstract_7291" xlink:to="Locator_exc_WeightedAverageDebtAndEquityReturn_7292" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AuthorizedReturnOnRateBaseAbstract" xlink:label="Locator_exc_AuthorizedReturnOnRateBaseAbstract_7293"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RateOfReturnOnCommonEquity" xlink:label="Locator_exc_RateOfReturnOnCommonEquity_7294"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_AuthorizedReturnOnRateBaseAbstract_7293" xlink:to="Locator_exc_RateOfReturnOnCommonEquity_7294" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AuthorizedReturnOnRateBaseAbstract" xlink:label="Locator_exc_AuthorizedReturnOnRateBaseAbstract_7295"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CommonEquityComponentCap" xlink:label="Locator_exc_CommonEquityComponentCap_7296"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_AuthorizedReturnOnRateBaseAbstract_7295" xlink:to="Locator_exc_CommonEquityComponentCap_7296" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AuthorizedReturnOnRateBaseAbstract" xlink:label="Locator_exc_AuthorizedReturnOnRateBaseAbstract_7297"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BaseRateOfReturnOnCommonEquity" xlink:label="Locator_exc_BaseRateOfReturnOnCommonEquity_7298"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_AuthorizedReturnOnRateBaseAbstract_7297" xlink:to="Locator_exc_BaseRateOfReturnOnCommonEquity_7298" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AuthorizedReturnOnRateBaseAbstract" xlink:label="Locator_exc_AuthorizedReturnOnRateBaseAbstract_7299"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BasisPointsOnRateOfReturnForRto" xlink:label="Locator_exc_BasisPointsOnRateOfReturnForRto_7300"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_AuthorizedReturnOnRateBaseAbstract_7299" xlink:to="Locator_exc_BasisPointsOnRateOfReturnForRto_7300" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AuthorizedReturnOnRateBaseAbstract" xlink:label="Locator_exc_AuthorizedReturnOnRateBaseAbstract_7301"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BasisPointsOnRateOfReturnOnCommonEquityForRisk" xlink:label="Locator_exc_BasisPointsOnRateOfReturnOnCommonEquityForRisk_7302"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_AuthorizedReturnOnRateBaseAbstract_7301" xlink:to="Locator_exc_BasisPointsOnRateOfReturnOnCommonEquityForRisk_7302" order="7.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AuthorizedReturnOnRateBaseAbstract" xlink:label="Locator_exc_AuthorizedReturnOnRateBaseAbstract_7303"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PercentOfCapitalStructureRelatedToDebt" xlink:label="Locator_exc_PercentOfCapitalStructureRelatedToDebt_7304"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_AuthorizedReturnOnRateBaseAbstract_7303" xlink:to="Locator_exc_PercentOfCapitalStructureRelatedToDebt_7304" order="8.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AuthorizedReturnOnRateBaseAbstract" xlink:label="Locator_exc_AuthorizedReturnOnRateBaseAbstract_7305"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PercentOfCapitalStructureRelatedToEquity" xlink:label="Locator_exc_PercentOfCapitalStructureRelatedToEquity_7306"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_AuthorizedReturnOnRateBaseAbstract_7305" xlink:to="Locator_exc_PercentOfCapitalStructureRelatedToEquity_7306" order="9.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AuthorizedReturnOnRateBaseAbstract" xlink:label="Locator_exc_AuthorizedReturnOnRateBaseAbstract_7307"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PercentOfRecoveryForConstructionWorkInProgress" xlink:label="Locator_exc_PercentOfRecoveryForConstructionWorkInProgress_7308"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_AuthorizedReturnOnRateBaseAbstract_7307" xlink:to="Locator_exc_PercentOfRecoveryForConstructionWorkInProgress_7308" order="10.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AuthorizedReturnOnRateBaseAbstract" xlink:label="Locator_exc_AuthorizedReturnOnRateBaseAbstract_7309"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PercentOfRecoveryForAbandonment" xlink:label="Locator_exc_PercentOfRecoveryForAbandonment_7310"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_AuthorizedReturnOnRateBaseAbstract_7309" xlink:to="Locator_exc_PercentOfRecoveryForAbandonment_7310" order="11.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RegulatoryMattersAdditionalNarrativeInformationLineItems" xlink:label="Locator_exc_RegulatoryMattersAdditionalNarrativeInformationLineItems_7311"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RegulatoryAssetsAndLiabilitiesOtherDisclosuresAbstract" xlink:label="Locator_us-gaap_RegulatoryAssetsAndLiabilitiesOtherDisclosuresAbstract_7312"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_RegulatoryMattersAdditionalNarrativeInformationLineItems_7311" xlink:to="Locator_us-gaap_RegulatoryAssetsAndLiabilitiesOtherDisclosuresAbstract_7312" order="17.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RegulatoryAssetsAndLiabilitiesOtherDisclosuresAbstract" xlink:label="Locator_us-gaap_RegulatoryAssetsAndLiabilitiesOtherDisclosuresAbstract_7313"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ParentCompanyPensionOpebRegulatoryAssetsNoncurrent" xlink:label="Locator_exc_ParentCompanyPensionOpebRegulatoryAssetsNoncurrent_7314"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RegulatoryAssetsAndLiabilitiesOtherDisclosuresAbstract_7313" xlink:to="Locator_exc_ParentCompanyPensionOpebRegulatoryAssetsNoncurrent_7314" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RegulatoryAssetsAndLiabilitiesOtherDisclosuresAbstract" xlink:label="Locator_us-gaap_RegulatoryAssetsAndLiabilitiesOtherDisclosuresAbstract_7315"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_UtilityPensionOpebRegulatoryAssetsNoncurrent" xlink:label="Locator_exc_UtilityPensionOpebRegulatoryAssetsNoncurrent_7316"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RegulatoryAssetsAndLiabilitiesOtherDisclosuresAbstract_7315" xlink:to="Locator_exc_UtilityPensionOpebRegulatoryAssetsNoncurrent_7316" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RegulatoryAssetsAndLiabilitiesOtherDisclosuresAbstract" xlink:label="Locator_us-gaap_RegulatoryAssetsAndLiabilitiesOtherDisclosuresAbstract_7317"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OverUnderRecoveredTransmissionCosts" xlink:label="Locator_exc_OverUnderRecoveredTransmissionCosts_7318"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RegulatoryAssetsAndLiabilitiesOtherDisclosuresAbstract_7317" xlink:to="Locator_exc_OverUnderRecoveredTransmissionCosts_7318" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RegulatoryAssetsAndLiabilitiesOtherDisclosuresAbstract" xlink:label="Locator_us-gaap_RegulatoryAssetsAndLiabilitiesOtherDisclosuresAbstract_7319"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OverUnderRecoveredElectricSupplyCosts" xlink:label="Locator_exc_OverUnderRecoveredElectricSupplyCosts_7320"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RegulatoryAssetsAndLiabilitiesOtherDisclosuresAbstract_7319" xlink:to="Locator_exc_OverUnderRecoveredElectricSupplyCosts_7320" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RegulatoryAssetsAndLiabilitiesOtherDisclosuresAbstract" xlink:label="Locator_us-gaap_RegulatoryAssetsAndLiabilitiesOtherDisclosuresAbstract_7321"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OverUnderRecoveredGasSupplyCosts" xlink:label="Locator_exc_OverUnderRecoveredGasSupplyCosts_7322"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RegulatoryAssetsAndLiabilitiesOtherDisclosuresAbstract_7321" xlink:to="Locator_exc_OverUnderRecoveredGasSupplyCosts_7322" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RegulatoryAssetsAndLiabilitiesOtherDisclosuresAbstract" xlink:label="Locator_us-gaap_RegulatoryAssetsAndLiabilitiesOtherDisclosuresAbstract_7323"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CompetitiveTransitionChargeReturnPercentage" xlink:label="Locator_exc_CompetitiveTransitionChargeReturnPercentage_7324"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RegulatoryAssetsAndLiabilitiesOtherDisclosuresAbstract_7323" xlink:to="Locator_exc_CompetitiveTransitionChargeReturnPercentage_7324" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RegulatoryAssetsAndLiabilitiesOtherDisclosuresAbstract" xlink:label="Locator_us-gaap_RegulatoryAssetsAndLiabilitiesOtherDisclosuresAbstract_7325"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SmartMeterRegulatoryAssetReturn" xlink:label="Locator_exc_SmartMeterRegulatoryAssetReturn_7326"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RegulatoryAssetsAndLiabilitiesOtherDisclosuresAbstract_7325" xlink:to="Locator_exc_SmartMeterRegulatoryAssetReturn_7326" order="7.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RegulatoryAssetsAndLiabilitiesOtherDisclosuresAbstract" xlink:label="Locator_us-gaap_RegulatoryAssetsAndLiabilitiesOtherDisclosuresAbstract_7327"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DspProgramItAssetReturn" xlink:label="Locator_exc_DspProgramItAssetReturn_7328"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RegulatoryAssetsAndLiabilitiesOtherDisclosuresAbstract_7327" xlink:to="Locator_exc_DspProgramItAssetReturn_7328" order="8.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RegulatoryAssetsAndLiabilitiesOtherDisclosuresAbstract" xlink:label="Locator_us-gaap_RegulatoryAssetsAndLiabilitiesOtherDisclosuresAbstract_7329"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EnergyUnderRecoveryReturn" xlink:label="Locator_exc_EnergyUnderRecoveryReturn_7330"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RegulatoryAssetsAndLiabilitiesOtherDisclosuresAbstract_7329" xlink:to="Locator_exc_EnergyUnderRecoveryReturn_7330" order="9.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RegulatoryAssetsAndLiabilitiesOtherDisclosuresAbstract" xlink:label="Locator_us-gaap_RegulatoryAssetsAndLiabilitiesOtherDisclosuresAbstract_7331"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EnergyOverRecoveryReturn" xlink:label="Locator_exc_EnergyOverRecoveryReturn_7332"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RegulatoryAssetsAndLiabilitiesOtherDisclosuresAbstract_7331" xlink:to="Locator_exc_EnergyOverRecoveryReturn_7332" order="10.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RegulatoryAssetsAndLiabilitiesOtherDisclosuresAbstract" xlink:label="Locator_us-gaap_RegulatoryAssetsAndLiabilitiesOtherDisclosuresAbstract_7333"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RealEstateTaxRefund" xlink:label="Locator_exc_RealEstateTaxRefund_7334"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RegulatoryAssetsAndLiabilitiesOtherDisclosuresAbstract_7333" xlink:to="Locator_exc_RealEstateTaxRefund_7334" order="11.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RegulatoryMattersAdditionalNarrativeInformationLineItems" xlink:label="Locator_exc_RegulatoryMattersAdditionalNarrativeInformationLineItems_7335"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PaHouseBillOneThousandTwoHundredNinetyFourAbstract" xlink:label="Locator_exc_PaHouseBillOneThousandTwoHundredNinetyFourAbstract_7336"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_RegulatoryMattersAdditionalNarrativeInformationLineItems_7335" xlink:to="Locator_exc_PaHouseBillOneThousandTwoHundredNinetyFourAbstract_7336" order="18.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PaHouseBillOneThousandTwoHundredNinetyFourAbstract" xlink:label="Locator_exc_PaHouseBillOneThousandTwoHundredNinetyFourAbstract_7337"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DsicMaximumPercentageOfRates" xlink:label="Locator_exc_DsicMaximumPercentageOfRates_7338"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_PaHouseBillOneThousandTwoHundredNinetyFourAbstract_7337" xlink:to="Locator_exc_DsicMaximumPercentageOfRates_7338" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RegulatoryMattersAdditionalNarrativeInformationLineItems" xlink:label="Locator_exc_RegulatoryMattersAdditionalNarrativeInformationLineItems_7339"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_TransmissionDevelopmentProjectAbstract" xlink:label="Locator_exc_TransmissionDevelopmentProjectAbstract_7340"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_RegulatoryMattersAdditionalNarrativeInformationLineItems_7339" xlink:to="Locator_exc_TransmissionDevelopmentProjectAbstract_7340" order="19.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_TransmissionDevelopmentProjectAbstract" xlink:label="Locator_exc_TransmissionDevelopmentProjectAbstract_7341"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_LengthOfTransmissionLine" xlink:label="Locator_exc_LengthOfTransmissionLine_7342"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_TransmissionDevelopmentProjectAbstract_7341" xlink:to="Locator_exc_LengthOfTransmissionLine_7342" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_TransmissionDevelopmentProjectAbstract" xlink:label="Locator_exc_TransmissionDevelopmentProjectAbstract_7343"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PercentOfOwnershipInRiteLineIllinois" xlink:label="Locator_exc_PercentOfOwnershipInRiteLineIllinois_7344"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_TransmissionDevelopmentProjectAbstract_7343" xlink:to="Locator_exc_PercentOfOwnershipInRiteLineIllinois_7344" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_TransmissionDevelopmentProjectAbstract" xlink:label="Locator_exc_TransmissionDevelopmentProjectAbstract_7345"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PercentOfOwnershipInRiteLineIndiana" xlink:label="Locator_exc_PercentOfOwnershipInRiteLineIndiana_7346"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_TransmissionDevelopmentProjectAbstract_7345" xlink:to="Locator_exc_PercentOfOwnershipInRiteLineIndiana_7346" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_TransmissionDevelopmentProjectAbstract" xlink:label="Locator_exc_TransmissionDevelopmentProjectAbstract_7347"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PercentOfOwnershipInExelonTransmissionCompanyLlc" xlink:label="Locator_exc_PercentOfOwnershipInExelonTransmissionCompanyLlc_7348"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_TransmissionDevelopmentProjectAbstract_7347" xlink:to="Locator_exc_PercentOfOwnershipInExelonTransmissionCompanyLlc_7348" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_TransmissionDevelopmentProjectAbstract" xlink:label="Locator_exc_TransmissionDevelopmentProjectAbstract_7349"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ExpectedTotalCostOfRiteLineProject" xlink:label="Locator_exc_ExpectedTotalCostOfRiteLineProject_7350"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_TransmissionDevelopmentProjectAbstract_7349" xlink:to="Locator_exc_ExpectedTotalCostOfRiteLineProject_7350" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RegulatoryMattersAdditionalNarrativeInformationLineItems" xlink:label="Locator_exc_RegulatoryMattersAdditionalNarrativeInformationLineItems_7351"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NaturalGasSupplierTariffAbstract" xlink:label="Locator_exc_NaturalGasSupplierTariffAbstract_7352"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_RegulatoryMattersAdditionalNarrativeInformationLineItems_7351" xlink:to="Locator_exc_NaturalGasSupplierTariffAbstract_7352" order="20.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NaturalGasSupplierTariffAbstract" xlink:label="Locator_exc_NaturalGasSupplierTariffAbstract_7353"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NaturalGasSupplierTariffTotalCollateral" xlink:label="Locator_exc_NaturalGasSupplierTariffTotalCollateral_7354"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_NaturalGasSupplierTariffAbstract_7353" xlink:to="Locator_exc_NaturalGasSupplierTariffTotalCollateral_7354" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NaturalGasSupplierTariffAbstract" xlink:label="Locator_exc_NaturalGasSupplierTariffAbstract_7355"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NaturalGasSupplierTariffCashCollateral" xlink:label="Locator_exc_NaturalGasSupplierTariffCashCollateral_7356"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_NaturalGasSupplierTariffAbstract_7355" xlink:to="Locator_exc_NaturalGasSupplierTariffCashCollateral_7356" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RegulatoryMattersAdditionalNarrativeInformationLineItems" xlink:label="Locator_exc_RegulatoryMattersAdditionalNarrativeInformationLineItems_7357"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_MarylandElectricAndNaturalGasDistributionRateCasesAbstract" xlink:label="Locator_exc_MarylandElectricAndNaturalGasDistributionRateCasesAbstract_7358"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_RegulatoryMattersAdditionalNarrativeInformationLineItems_7357" xlink:to="Locator_exc_MarylandElectricAndNaturalGasDistributionRateCasesAbstract_7358" order="21.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_MarylandElectricAndNaturalGasDistributionRateCasesAbstract" xlink:label="Locator_exc_MarylandElectricAndNaturalGasDistributionRateCasesAbstract_7359"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DeferralOfTotalCosts" xlink:label="Locator_exc_DeferralOfTotalCosts_7360"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_MarylandElectricAndNaturalGasDistributionRateCasesAbstract_7359" xlink:to="Locator_exc_DeferralOfTotalCosts_7360" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_MarylandElectricAndNaturalGasDistributionRateCasesAbstract" xlink:label="Locator_exc_MarylandElectricAndNaturalGasDistributionRateCasesAbstract_7361"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DeferralOfStormCosts" xlink:label="Locator_exc_DeferralOfStormCosts_7362"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_MarylandElectricAndNaturalGasDistributionRateCasesAbstract_7361" xlink:to="Locator_exc_DeferralOfStormCosts_7362" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PurchaseOfReceivablesLineItems" xlink:label="Locator_exc_PurchaseOfReceivablesLineItems_6845"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PurchaseOfReceivablesTable" xlink:label="Locator_exc_PurchaseOfReceivablesTable_6846"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="Locator_exc_PurchaseOfReceivablesLineItems_6845" xlink:to="Locator_exc_PurchaseOfReceivablesTable_6846" order="0.5" xbrldt:contextElement="segment" xbrldt:closed="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PurchaseOfReceivablesTable" xlink:label="Locator_exc_PurchaseOfReceivablesTable_6911"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_6912"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_exc_PurchaseOfReceivablesTable_6911" xlink:to="Locator_dei_LegalEntityAxis_6912" order="0.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PurchaseOfReceivablesLineItems" xlink:label="Locator_exc_PurchaseOfReceivablesLineItems_7415"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PurchaseOfReceivablesAbstract" xlink:label="Locator_exc_PurchaseOfReceivablesAbstract_7416"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_PurchaseOfReceivablesLineItems_7415" xlink:to="Locator_exc_PurchaseOfReceivablesAbstract_7416" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PurchaseOfReceivablesAbstract" xlink:label="Locator_exc_PurchaseOfReceivablesAbstract_7417"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PorGrossReceivables" xlink:label="Locator_exc_PorGrossReceivables_7418"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_PurchaseOfReceivablesAbstract_7417" xlink:to="Locator_exc_PorGrossReceivables_7418" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PurchaseOfReceivablesAbstract" xlink:label="Locator_exc_PurchaseOfReceivablesAbstract_7419"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PorAllowance" xlink:label="Locator_exc_PorAllowance_7420"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_PurchaseOfReceivablesAbstract_7419" xlink:to="Locator_exc_PorAllowance_7420" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PurchaseOfReceivablesAbstract" xlink:label="Locator_exc_PurchaseOfReceivablesAbstract_7421"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PorNetReceivables" xlink:label="Locator_exc_PorNetReceivables_7422"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_PurchaseOfReceivablesAbstract_7421" xlink:to="Locator_exc_PorNetReceivables_7422" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PurchaseOfReceivablesAbstract" xlink:label="Locator_exc_PurchaseOfReceivablesAbstract_7423"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PorDiscount" xlink:label="Locator_exc_PorDiscount_7424"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_PurchaseOfReceivablesAbstract_7423" xlink:to="Locator_exc_PorDiscount_7424" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RegulatoryAssetLineItems" xlink:label="Locator_us-gaap_RegulatoryAssetLineItems_6633"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScheduleOfRegulatoryAssetsTable" xlink:label="Locator_us-gaap_ScheduleOfRegulatoryAssetsTable_6634"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="Locator_us-gaap_RegulatoryAssetLineItems_6633" xlink:to="Locator_us-gaap_ScheduleOfRegulatoryAssetsTable_6634" order="0.5" xbrldt:contextElement="segment" xbrldt:closed="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScheduleOfRegulatoryAssetsTable" xlink:label="Locator_us-gaap_ScheduleOfRegulatoryAssetsTable_6891"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_6892"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_us-gaap_ScheduleOfRegulatoryAssetsTable_6891" xlink:to="Locator_dei_LegalEntityAxis_6892" order="0.0"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScheduleOfRegulatoryAssetsTable" xlink:label="Locator_us-gaap_ScheduleOfRegulatoryAssetsTable_6893"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RegulatoryAssetAxis" xlink:label="Locator_us-gaap_RegulatoryAssetAxis_6894"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_us-gaap_ScheduleOfRegulatoryAssetsTable_6893" xlink:to="Locator_us-gaap_RegulatoryAssetAxis_6894" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RegulatoryAssetAxis" xlink:label="Locator_us-gaap_RegulatoryAssetAxis_6445"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RegulatoryAssetDomain" xlink:label="Locator_us-gaap_RegulatoryAssetDomain_6446"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="Locator_us-gaap_RegulatoryAssetAxis_6445" xlink:to="Locator_us-gaap_RegulatoryAssetDomain_6446" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RegulatoryAssetAxis" xlink:label="Locator_us-gaap_RegulatoryAssetAxis_6975"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RegulatoryAssetDomain" xlink:label="Locator_us-gaap_RegulatoryAssetDomain_6976"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_us-gaap_RegulatoryAssetAxis_6975" xlink:to="Locator_us-gaap_RegulatoryAssetDomain_6976" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RegulatoryAssetLineItems" xlink:label="Locator_us-gaap_RegulatoryAssetLineItems_7363"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RegulatoryAssetsNoncurrent" xlink:label="Locator_us-gaap_RegulatoryAssetsNoncurrent_7364"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RegulatoryAssetLineItems_7363" xlink:to="Locator_us-gaap_RegulatoryAssetsNoncurrent_7364" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RegulatoryAssetLineItems" xlink:label="Locator_us-gaap_RegulatoryAssetLineItems_7365"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RegulatoryAssetsCurrent" xlink:label="Locator_us-gaap_RegulatoryAssetsCurrent_7366"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RegulatoryAssetLineItems_7365" xlink:to="Locator_us-gaap_RegulatoryAssetsCurrent_7366" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RegulatoryAssetLineItems" xlink:label="Locator_us-gaap_RegulatoryAssetLineItems_7367"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RegulatoryAssets" xlink:label="Locator_us-gaap_RegulatoryAssets_7368"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RegulatoryAssetLineItems_7367" xlink:to="Locator_us-gaap_RegulatoryAssets_7368" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RegulatoryAssetLineItems" xlink:label="Locator_us-gaap_RegulatoryAssetLineItems_7369"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NetRegulatoryAsset" xlink:label="Locator_exc_NetRegulatoryAsset_7370"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RegulatoryAssetLineItems_7369" xlink:to="Locator_exc_NetRegulatoryAsset_7370" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RegulatoryAssetLineItems" xlink:label="Locator_us-gaap_RegulatoryAssetLineItems_7371"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RegulatoryAssetLiabilityTableFootnoteDataAbstract" xlink:label="Locator_exc_RegulatoryAssetLiabilityTableFootnoteDataAbstract_7372"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RegulatoryAssetLineItems_7371" xlink:to="Locator_exc_RegulatoryAssetLiabilityTableFootnoteDataAbstract_7372" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RegulatoryAssetLiabilityTableFootnoteDataAbstract" xlink:label="Locator_exc_RegulatoryAssetLiabilityTableFootnoteDataAbstract_7373"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ElectricSupplyCostsUnderRecovery" xlink:label="Locator_exc_ElectricSupplyCostsUnderRecovery_7374"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_RegulatoryAssetLiabilityTableFootnoteDataAbstract_7373" xlink:to="Locator_exc_ElectricSupplyCostsUnderRecovery_7374" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RegulatoryAssetLiabilityTableFootnoteDataAbstract" xlink:label="Locator_exc_RegulatoryAssetLiabilityTableFootnoteDataAbstract_7375"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_TransmissionCostsUnderRecovery" xlink:label="Locator_exc_TransmissionCostsUnderRecovery_7376"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_RegulatoryAssetLiabilityTableFootnoteDataAbstract_7375" xlink:to="Locator_exc_TransmissionCostsUnderRecovery_7376" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RegulatoryAssetLiabilityTableFootnoteDataAbstract" xlink:label="Locator_exc_RegulatoryAssetLiabilityTableFootnoteDataAbstract_7377"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ApprovedRecoveryOfRestructuringCosts" xlink:label="Locator_exc_ApprovedRecoveryOfRestructuringCosts_7378"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_RegulatoryAssetLiabilityTableFootnoteDataAbstract_7377" xlink:to="Locator_exc_ApprovedRecoveryOfRestructuringCosts_7378" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RegulatoryLiabilitiesLineItems" xlink:label="Locator_us-gaap_RegulatoryLiabilitiesLineItems_6649"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScheduleOfRegulatoryLiabilitiesTable" xlink:label="Locator_us-gaap_ScheduleOfRegulatoryLiabilitiesTable_6650"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="Locator_us-gaap_RegulatoryLiabilitiesLineItems_6649" xlink:to="Locator_us-gaap_ScheduleOfRegulatoryLiabilitiesTable_6650" order="0.5" xbrldt:contextElement="segment" xbrldt:closed="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScheduleOfRegulatoryLiabilitiesTable" xlink:label="Locator_us-gaap_ScheduleOfRegulatoryLiabilitiesTable_6895"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_6896"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_us-gaap_ScheduleOfRegulatoryLiabilitiesTable_6895" xlink:to="Locator_dei_LegalEntityAxis_6896" order="0.0"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScheduleOfRegulatoryLiabilitiesTable" xlink:label="Locator_us-gaap_ScheduleOfRegulatoryLiabilitiesTable_6897"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RegulatoryLiabilityAxis" xlink:label="Locator_us-gaap_RegulatoryLiabilityAxis_6898"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_us-gaap_ScheduleOfRegulatoryLiabilitiesTable_6897" xlink:to="Locator_us-gaap_RegulatoryLiabilityAxis_6898" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RegulatoryLiabilitiesLineItems" xlink:label="Locator_us-gaap_RegulatoryLiabilitiesLineItems_7379"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RegulatoryLiabilityCurrent" xlink:label="Locator_us-gaap_RegulatoryLiabilityCurrent_7380"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RegulatoryLiabilitiesLineItems_7379" xlink:to="Locator_us-gaap_RegulatoryLiabilityCurrent_7380" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RegulatoryLiabilitiesLineItems" xlink:label="Locator_us-gaap_RegulatoryLiabilitiesLineItems_7381"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RegulatoryLiabilityNoncurrent" xlink:label="Locator_us-gaap_RegulatoryLiabilityNoncurrent_7382"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RegulatoryLiabilitiesLineItems_7381" xlink:to="Locator_us-gaap_RegulatoryLiabilityNoncurrent_7382" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RegulatoryLiabilitiesLineItems" xlink:label="Locator_us-gaap_RegulatoryLiabilitiesLineItems_7383"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RegulatoryLiabilities" xlink:label="Locator_us-gaap_RegulatoryLiabilities_7384"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RegulatoryLiabilitiesLineItems_7383" xlink:to="Locator_us-gaap_RegulatoryLiabilities_7384" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RegulatoryLiabilitiesLineItems" xlink:label="Locator_us-gaap_RegulatoryLiabilitiesLineItems_7385"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RegulatoryLiabilitiesTableFootnoteDataAbstract" xlink:label="Locator_exc_RegulatoryLiabilitiesTableFootnoteDataAbstract_7386"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RegulatoryLiabilitiesLineItems_7385" xlink:to="Locator_exc_RegulatoryLiabilitiesTableFootnoteDataAbstract_7386" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RegulatoryLiabilitiesTableFootnoteDataAbstract" xlink:label="Locator_exc_RegulatoryLiabilitiesTableFootnoteDataAbstract_7387"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PurchasedNaturalGasCostsOverRecovery" xlink:label="Locator_exc_PurchasedNaturalGasCostsOverRecovery_7388"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_RegulatoryLiabilitiesTableFootnoteDataAbstract_7387" xlink:to="Locator_exc_PurchasedNaturalGasCostsOverRecovery_7388" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RegulatoryLiabilitiesTableFootnoteDataAbstract" xlink:label="Locator_exc_RegulatoryLiabilitiesTableFootnoteDataAbstract_7389"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ElectricSupplyCostsOverRecovery" xlink:label="Locator_exc_ElectricSupplyCostsOverRecovery_7390"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_RegulatoryLiabilitiesTableFootnoteDataAbstract_7389" xlink:to="Locator_exc_ElectricSupplyCostsOverRecovery_7390" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RegulatoryLiabilitiesTableFootnoteDataAbstract" xlink:label="Locator_exc_RegulatoryLiabilitiesTableFootnoteDataAbstract_7391"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ElectricTransmissionCostsUnderRecovery" xlink:label="Locator_exc_ElectricTransmissionCostsUnderRecovery_7392"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_RegulatoryLiabilitiesTableFootnoteDataAbstract_7391" xlink:to="Locator_exc_ElectricTransmissionCostsUnderRecovery_7392" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RegulatoryLiabilitiesTableFootnoteDataAbstract" xlink:label="Locator_exc_RegulatoryLiabilitiesTableFootnoteDataAbstract_7393"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PurchasedNaturalGasCostsUnderRecovery" xlink:label="Locator_exc_PurchasedNaturalGasCostsUnderRecovery_7394"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_RegulatoryLiabilitiesTableFootnoteDataAbstract_7393" xlink:to="Locator_exc_PurchasedNaturalGasCostsUnderRecovery_7394" order="3.0" xbrldt:usable="true"/> |
| | </definitionLink> |
| <definitionLink xlink:type="extended" xlink:role="http://exeloncorp.com/role/DisclosureIncomeTaxesDetails"> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_7897"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_7898"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_dei_LegalEntityAxis_7897" xlink:to="Locator_dei_EntityDomain_7898" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_7907"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ParentCompanyMember" xlink:label="Locator_us-gaap_ParentCompanyMember_7908"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_7907" xlink:to="Locator_us-gaap_ParentCompanyMember_7908" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_7899"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ExelonGenerationCoLLCMember" xlink:label="Locator_exc_ExelonGenerationCoLLCMember_7900"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_7899" xlink:to="Locator_exc_ExelonGenerationCoLLCMember_7900" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_7901"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CommonwealthEdisonCoMember" xlink:label="Locator_exc_CommonwealthEdisonCoMember_7902"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_7901" xlink:to="Locator_exc_CommonwealthEdisonCoMember_7902" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_7903"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PecoEnergyCoMember" xlink:label="Locator_exc_PecoEnergyCoMember_7904"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_7903" xlink:to="Locator_exc_PecoEnergyCoMember_7904" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_7905"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BaltimoreGasAndElectricCompanyMember" xlink:label="Locator_exc_BaltimoreGasAndElectricCompanyMember_7906"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_7905" xlink:to="Locator_exc_BaltimoreGasAndElectricCompanyMember_7906" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_IncomeTaxExpenseBenefitContinuingOperationsLineItems" xlink:label="Locator_exc_IncomeTaxExpenseBenefitContinuingOperationsLineItems_7679"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_IncomeTaxExpenseBenefitContinuingOperationsTable" xlink:label="Locator_exc_IncomeTaxExpenseBenefitContinuingOperationsTable_7680"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="Locator_exc_IncomeTaxExpenseBenefitContinuingOperationsLineItems_7679" xlink:to="Locator_exc_IncomeTaxExpenseBenefitContinuingOperationsTable_7680" order="0.5" xbrldt:contextElement="segment" xbrldt:closed="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_IncomeTaxExpenseBenefitContinuingOperationsTable" xlink:label="Locator_exc_IncomeTaxExpenseBenefitContinuingOperationsTable_7885"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_7886"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_exc_IncomeTaxExpenseBenefitContinuingOperationsTable_7885" xlink:to="Locator_dei_LegalEntityAxis_7886" order="0.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_IncomeTaxExpenseBenefitContinuingOperationsTable" xlink:label="Locator_exc_IncomeTaxExpenseBenefitContinuingOperationsTable_7887"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_IncomeTaxExpenseBenefitContinuingOperationsAxis" xlink:label="Locator_exc_IncomeTaxExpenseBenefitContinuingOperationsAxis_7888"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_exc_IncomeTaxExpenseBenefitContinuingOperationsTable_7887" xlink:to="Locator_exc_IncomeTaxExpenseBenefitContinuingOperationsAxis_7888" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_IncomeTaxExpenseBenefitContinuingOperationsAxis" xlink:label="Locator_exc_IncomeTaxExpenseBenefitContinuingOperationsAxis_7591"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_IncomeTaxExpenseBenefitContinuingOperationsByTypeDomain" xlink:label="Locator_exc_IncomeTaxExpenseBenefitContinuingOperationsByTypeDomain_7592"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="Locator_exc_IncomeTaxExpenseBenefitContinuingOperationsAxis_7591" xlink:to="Locator_exc_IncomeTaxExpenseBenefitContinuingOperationsByTypeDomain_7592" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_IncomeTaxExpenseBenefitContinuingOperationsAxis" xlink:label="Locator_exc_IncomeTaxExpenseBenefitContinuingOperationsAxis_7909"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_IncomeTaxExpenseBenefitContinuingOperationsByTypeDomain" xlink:label="Locator_exc_IncomeTaxExpenseBenefitContinuingOperationsByTypeDomain_7910"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_exc_IncomeTaxExpenseBenefitContinuingOperationsAxis_7909" xlink:to="Locator_exc_IncomeTaxExpenseBenefitContinuingOperationsByTypeDomain_7910" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_IncomeTaxExpenseBenefitContinuingOperationsByTypeDomain" xlink:label="Locator_exc_IncomeTaxExpenseBenefitContinuingOperationsByTypeDomain_7911"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FederalIncomeTaxExpenseBenefitContinuingOperationsMember" xlink:label="Locator_exc_FederalIncomeTaxExpenseBenefitContinuingOperationsMember_7912"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_IncomeTaxExpenseBenefitContinuingOperationsByTypeDomain_7911" xlink:to="Locator_exc_FederalIncomeTaxExpenseBenefitContinuingOperationsMember_7912" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_IncomeTaxExpenseBenefitContinuingOperationsByTypeDomain" xlink:label="Locator_exc_IncomeTaxExpenseBenefitContinuingOperationsByTypeDomain_7913"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_StateIncomeTaxExpenseBenefitContinuingOperationsMember" xlink:label="Locator_exc_StateIncomeTaxExpenseBenefitContinuingOperationsMember_7914"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_IncomeTaxExpenseBenefitContinuingOperationsByTypeDomain_7913" xlink:to="Locator_exc_StateIncomeTaxExpenseBenefitContinuingOperationsMember_7914" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_IncomeTaxExpenseBenefitContinuingOperationsLineItems" xlink:label="Locator_exc_IncomeTaxExpenseBenefitContinuingOperationsLineItems_7947"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CurrentIncomeTaxExpenseBenefit" xlink:label="Locator_us-gaap_CurrentIncomeTaxExpenseBenefit_7948"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_IncomeTaxExpenseBenefitContinuingOperationsLineItems_7947" xlink:to="Locator_us-gaap_CurrentIncomeTaxExpenseBenefit_7948" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_IncomeTaxExpenseBenefitContinuingOperationsLineItems" xlink:label="Locator_exc_IncomeTaxExpenseBenefitContinuingOperationsLineItems_7949"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DeferredIncomeTaxExpenseBenefit" xlink:label="Locator_us-gaap_DeferredIncomeTaxExpenseBenefit_7950"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_IncomeTaxExpenseBenefitContinuingOperationsLineItems_7949" xlink:to="Locator_us-gaap_DeferredIncomeTaxExpenseBenefit_7950" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_IncomeTaxExpenseBenefitContinuingOperationsLineItems" xlink:label="Locator_exc_IncomeTaxExpenseBenefitContinuingOperationsLineItems_7951"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_TaxCreditsInvestmentAmortization" xlink:label="Locator_exc_TaxCreditsInvestmentAmortization_7952"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_IncomeTaxExpenseBenefitContinuingOperationsLineItems_7951" xlink:to="Locator_exc_TaxCreditsInvestmentAmortization_7952" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_IncomeTaxExpenseBenefitContinuingOperationsLineItems" xlink:label="Locator_exc_IncomeTaxExpenseBenefitContinuingOperationsLineItems_7953"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="Locator_us-gaap_IncomeTaxExpenseBenefit_7954"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_IncomeTaxExpenseBenefitContinuingOperationsLineItems_7953" xlink:to="Locator_us-gaap_IncomeTaxExpenseBenefit_7954" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRateLineItems" xlink:label="Locator_exc_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRateLineItems_7683"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRateTable" xlink:label="Locator_exc_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRateTable_7684"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="Locator_exc_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRateLineItems_7683" xlink:to="Locator_exc_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRateTable_7684" order="0.5" xbrldt:contextElement="segment" xbrldt:closed="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRateTable" xlink:label="Locator_exc_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRateTable_7889"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_7890"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_exc_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRateTable_7889" xlink:to="Locator_dei_LegalEntityAxis_7890" order="0.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRateLineItems" xlink:label="Locator_exc_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRateLineItems_7955"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_EffectiveIncomeTaxRateContinuingOperationsTaxRateReconciliationAbstract" xlink:label="Locator_us-gaap_EffectiveIncomeTaxRateContinuingOperationsTaxRateReconciliationAbstract_7956"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRateLineItems_7955" xlink:to="Locator_us-gaap_EffectiveIncomeTaxRateContinuingOperationsTaxRateReconciliationAbstract_7956" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_EffectiveIncomeTaxRateContinuingOperationsTaxRateReconciliationAbstract" xlink:label="Locator_us-gaap_EffectiveIncomeTaxRateContinuingOperationsTaxRateReconciliationAbstract_7957"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate" xlink:label="Locator_us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate_7958"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_EffectiveIncomeTaxRateContinuingOperationsTaxRateReconciliationAbstract_7957" xlink:to="Locator_us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate_7958" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_EffectiveIncomeTaxRateContinuingOperationsTaxRateReconciliationAbstract" xlink:label="Locator_us-gaap_EffectiveIncomeTaxRateContinuingOperationsTaxRateReconciliationAbstract_7959"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AdjustmentsToReconcileFederalStatutoryIncomeTaxRateToEffectiveIncomeTaxRateContinuingOperationsAbstract" xlink:label="Locator_exc_AdjustmentsToReconcileFederalStatutoryIncomeTaxRateToEffectiveIncomeTaxRateContinuingOperationsAbstract_7960"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_EffectiveIncomeTaxRateContinuingOperationsTaxRateReconciliationAbstract_7959" xlink:to="Locator_exc_AdjustmentsToReconcileFederalStatutoryIncomeTaxRateToEffectiveIncomeTaxRateContinuingOperationsAbstract_7960" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AdjustmentsToReconcileFederalStatutoryIncomeTaxRateToEffectiveIncomeTaxRateContinuingOperationsAbstract" xlink:label="Locator_exc_AdjustmentsToReconcileFederalStatutoryIncomeTaxRateToEffectiveIncomeTaxRateContinuingOperationsAbstract_7961"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes" xlink:label="Locator_us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes_7962"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_AdjustmentsToReconcileFederalStatutoryIncomeTaxRateToEffectiveIncomeTaxRateContinuingOperationsAbstract_7961" xlink:to="Locator_us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes_7962" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AdjustmentsToReconcileFederalStatutoryIncomeTaxRateToEffectiveIncomeTaxRateContinuingOperationsAbstract" xlink:label="Locator_exc_AdjustmentsToReconcileFederalStatutoryIncomeTaxRateToEffectiveIncomeTaxRateContinuingOperationsAbstract_7963"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EffectiveIncomeTaxRateReconciliationQualifiedNuclearDecommissioningTrustFundIncomeLosses" xlink:label="Locator_exc_EffectiveIncomeTaxRateReconciliationQualifiedNuclearDecommissioningTrustFundIncomeLosses_7964"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_AdjustmentsToReconcileFederalStatutoryIncomeTaxRateToEffectiveIncomeTaxRateContinuingOperationsAbstract_7963" xlink:to="Locator_exc_EffectiveIncomeTaxRateReconciliationQualifiedNuclearDecommissioningTrustFundIncomeLosses_7964" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AdjustmentsToReconcileFederalStatutoryIncomeTaxRateToEffectiveIncomeTaxRateContinuingOperationsAbstract" xlink:label="Locator_exc_AdjustmentsToReconcileFederalStatutoryIncomeTaxRateToEffectiveIncomeTaxRateContinuingOperationsAbstract_7965"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationDeductionsQualifiedProductionActivities" xlink:label="Locator_us-gaap_EffectiveIncomeTaxRateReconciliationDeductionsQualifiedProductionActivities_7966"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_AdjustmentsToReconcileFederalStatutoryIncomeTaxRateToEffectiveIncomeTaxRateContinuingOperationsAbstract_7965" xlink:to="Locator_us-gaap_EffectiveIncomeTaxRateReconciliationDeductionsQualifiedProductionActivities_7966" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AdjustmentsToReconcileFederalStatutoryIncomeTaxRateToEffectiveIncomeTaxRateContinuingOperationsAbstract" xlink:label="Locator_exc_AdjustmentsToReconcileFederalStatutoryIncomeTaxRateToEffectiveIncomeTaxRateContinuingOperationsAbstract_7967"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationTaxExemptIncome" xlink:label="Locator_us-gaap_EffectiveIncomeTaxRateReconciliationTaxExemptIncome_7968"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_AdjustmentsToReconcileFederalStatutoryIncomeTaxRateToEffectiveIncomeTaxRateContinuingOperationsAbstract_7967" xlink:to="Locator_us-gaap_EffectiveIncomeTaxRateReconciliationTaxExemptIncome_7968" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AdjustmentsToReconcileFederalStatutoryIncomeTaxRateToEffectiveIncomeTaxRateContinuingOperationsAbstract" xlink:label="Locator_exc_AdjustmentsToReconcileFederalStatutoryIncomeTaxRateToEffectiveIncomeTaxRateContinuingOperationsAbstract_7969"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EffectiveIncomeTaxRateReconciliationNontaxablePostretirementBenefits" xlink:label="Locator_exc_EffectiveIncomeTaxRateReconciliationNontaxablePostretirementBenefits_7970"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_AdjustmentsToReconcileFederalStatutoryIncomeTaxRateToEffectiveIncomeTaxRateContinuingOperationsAbstract_7969" xlink:to="Locator_exc_EffectiveIncomeTaxRateReconciliationNontaxablePostretirementBenefits_7970" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AdjustmentsToReconcileFederalStatutoryIncomeTaxRateToEffectiveIncomeTaxRateContinuingOperationsAbstract" xlink:label="Locator_exc_AdjustmentsToReconcileFederalStatutoryIncomeTaxRateToEffectiveIncomeTaxRateContinuingOperationsAbstract_7971"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EffectiveIncomeTaxRateReconciliationEliminationOfDeductionsMedicarePrescriptionDrugBenefit" xlink:label="Locator_exc_EffectiveIncomeTaxRateReconciliationEliminationOfDeductionsMedicarePrescriptionDrugBenefit_7972"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_AdjustmentsToReconcileFederalStatutoryIncomeTaxRateToEffectiveIncomeTaxRateContinuingOperationsAbstract_7971" xlink:to="Locator_exc_EffectiveIncomeTaxRateReconciliationEliminationOfDeductionsMedicarePrescriptionDrugBenefit_7972" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AdjustmentsToReconcileFederalStatutoryIncomeTaxRateToEffectiveIncomeTaxRateContinuingOperationsAbstract" xlink:label="Locator_exc_AdjustmentsToReconcileFederalStatutoryIncomeTaxRateToEffectiveIncomeTaxRateContinuingOperationsAbstract_7973"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationTaxCreditsInvestment" xlink:label="Locator_us-gaap_EffectiveIncomeTaxRateReconciliationTaxCreditsInvestment_7974"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_AdjustmentsToReconcileFederalStatutoryIncomeTaxRateToEffectiveIncomeTaxRateContinuingOperationsAbstract_7973" xlink:to="Locator_us-gaap_EffectiveIncomeTaxRateReconciliationTaxCreditsInvestment_7974" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AdjustmentsToReconcileFederalStatutoryIncomeTaxRateToEffectiveIncomeTaxRateContinuingOperationsAbstract" xlink:label="Locator_exc_AdjustmentsToReconcileFederalStatutoryIncomeTaxRateToEffectiveIncomeTaxRateContinuingOperationsAbstract_7975"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EffectiveIncomeTaxRateReconciliationPlantBasisDifferences" xlink:label="Locator_exc_EffectiveIncomeTaxRateReconciliationPlantBasisDifferences_7976"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_AdjustmentsToReconcileFederalStatutoryIncomeTaxRateToEffectiveIncomeTaxRateContinuingOperationsAbstract_7975" xlink:to="Locator_exc_EffectiveIncomeTaxRateReconciliationPlantBasisDifferences_7976" order="7.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AdjustmentsToReconcileFederalStatutoryIncomeTaxRateToEffectiveIncomeTaxRateContinuingOperationsAbstract" xlink:label="Locator_exc_AdjustmentsToReconcileFederalStatutoryIncomeTaxRateToEffectiveIncomeTaxRateContinuingOperationsAbstract_7977"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationDeductionsOther" xlink:label="Locator_us-gaap_EffectiveIncomeTaxRateReconciliationDeductionsOther_7978"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_AdjustmentsToReconcileFederalStatutoryIncomeTaxRateToEffectiveIncomeTaxRateContinuingOperationsAbstract_7977" xlink:to="Locator_us-gaap_EffectiveIncomeTaxRateReconciliationDeductionsOther_7978" order="8.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AdjustmentsToReconcileFederalStatutoryIncomeTaxRateToEffectiveIncomeTaxRateContinuingOperationsAbstract" xlink:label="Locator_exc_AdjustmentsToReconcileFederalStatutoryIncomeTaxRateToEffectiveIncomeTaxRateContinuingOperationsAbstract_7979"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationTaxContingenciesDomestic" xlink:label="Locator_us-gaap_EffectiveIncomeTaxRateReconciliationTaxContingenciesDomestic_7980"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_AdjustmentsToReconcileFederalStatutoryIncomeTaxRateToEffectiveIncomeTaxRateContinuingOperationsAbstract_7979" xlink:to="Locator_us-gaap_EffectiveIncomeTaxRateReconciliationTaxContingenciesDomestic_7980" order="9.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AdjustmentsToReconcileFederalStatutoryIncomeTaxRateToEffectiveIncomeTaxRateContinuingOperationsAbstract" xlink:label="Locator_exc_AdjustmentsToReconcileFederalStatutoryIncomeTaxRateToEffectiveIncomeTaxRateContinuingOperationsAbstract_7981"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EffectiveIncomeTaxRateReconciliationUncertainTaxPositionRemeasurement" xlink:label="Locator_exc_EffectiveIncomeTaxRateReconciliationUncertainTaxPositionRemeasurement_7982"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_AdjustmentsToReconcileFederalStatutoryIncomeTaxRateToEffectiveIncomeTaxRateContinuingOperationsAbstract_7981" xlink:to="Locator_exc_EffectiveIncomeTaxRateReconciliationUncertainTaxPositionRemeasurement_7982" order="10.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AdjustmentsToReconcileFederalStatutoryIncomeTaxRateToEffectiveIncomeTaxRateContinuingOperationsAbstract" xlink:label="Locator_exc_AdjustmentsToReconcileFederalStatutoryIncomeTaxRateToEffectiveIncomeTaxRateContinuingOperationsAbstract_7983"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EffectiveIncomeTaxRateReconciliationFinesAndPenalties" xlink:label="Locator_exc_EffectiveIncomeTaxRateReconciliationFinesAndPenalties_7984"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_AdjustmentsToReconcileFederalStatutoryIncomeTaxRateToEffectiveIncomeTaxRateContinuingOperationsAbstract_7983" xlink:to="Locator_exc_EffectiveIncomeTaxRateReconciliationFinesAndPenalties_7984" order="11.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AdjustmentsToReconcileFederalStatutoryIncomeTaxRateToEffectiveIncomeTaxRateContinuingOperationsAbstract" xlink:label="Locator_exc_AdjustmentsToReconcileFederalStatutoryIncomeTaxRateToEffectiveIncomeTaxRateContinuingOperationsAbstract_7985"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EffectiveIncomeTaxRateReconciliationMergerExpenses" xlink:label="Locator_exc_EffectiveIncomeTaxRateReconciliationMergerExpenses_7986"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_AdjustmentsToReconcileFederalStatutoryIncomeTaxRateToEffectiveIncomeTaxRateContinuingOperationsAbstract_7985" xlink:to="Locator_exc_EffectiveIncomeTaxRateReconciliationMergerExpenses_7986" order="12.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AdjustmentsToReconcileFederalStatutoryIncomeTaxRateToEffectiveIncomeTaxRateContinuingOperationsAbstract" xlink:label="Locator_exc_AdjustmentsToReconcileFederalStatutoryIncomeTaxRateToEffectiveIncomeTaxRateContinuingOperationsAbstract_7987"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationTaxCreditsOther" xlink:label="Locator_us-gaap_EffectiveIncomeTaxRateReconciliationTaxCreditsOther_7988"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_AdjustmentsToReconcileFederalStatutoryIncomeTaxRateToEffectiveIncomeTaxRateContinuingOperationsAbstract_7987" xlink:to="Locator_us-gaap_EffectiveIncomeTaxRateReconciliationTaxCreditsOther_7988" order="13.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AdjustmentsToReconcileFederalStatutoryIncomeTaxRateToEffectiveIncomeTaxRateContinuingOperationsAbstract" xlink:label="Locator_exc_AdjustmentsToReconcileFederalStatutoryIncomeTaxRateToEffectiveIncomeTaxRateContinuingOperationsAbstract_7989"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments" xlink:label="Locator_us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments_7990"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_AdjustmentsToReconcileFederalStatutoryIncomeTaxRateToEffectiveIncomeTaxRateContinuingOperationsAbstract_7989" xlink:to="Locator_us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments_7990" order="14.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_EffectiveIncomeTaxRateContinuingOperationsTaxRateReconciliationAbstract" xlink:label="Locator_us-gaap_EffectiveIncomeTaxRateContinuingOperationsTaxRateReconciliationAbstract_7991"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_EffectiveIncomeTaxRateContinuingOperations" xlink:label="Locator_us-gaap_EffectiveIncomeTaxRateContinuingOperations_7992"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_EffectiveIncomeTaxRateContinuingOperationsTaxRateReconciliationAbstract_7991" xlink:to="Locator_us-gaap_EffectiveIncomeTaxRateContinuingOperations_7992" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_EffectiveIncomeTaxRateContinuingOperationsTaxRateReconciliationAbstract" xlink:label="Locator_us-gaap_EffectiveIncomeTaxRateContinuingOperationsTaxRateReconciliationAbstract_7993"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EffectiveIncomeTaxRateImpactAbstract" xlink:label="Locator_exc_EffectiveIncomeTaxRateImpactAbstract_7994"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_EffectiveIncomeTaxRateContinuingOperationsTaxRateReconciliationAbstract_7993" xlink:to="Locator_exc_EffectiveIncomeTaxRateImpactAbstract_7994" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EffectiveIncomeTaxRateImpactAbstract" xlink:label="Locator_exc_EffectiveIncomeTaxRateImpactAbstract_7995"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EffectiveIncomeTaxRateImpactUncertainTaxPositions" xlink:label="Locator_exc_EffectiveIncomeTaxRateImpactUncertainTaxPositions_7996"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_EffectiveIncomeTaxRateImpactAbstract_7995" xlink:to="Locator_exc_EffectiveIncomeTaxRateImpactUncertainTaxPositions_7996" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EffectiveIncomeTaxRateImpactAbstract" xlink:label="Locator_exc_EffectiveIncomeTaxRateImpactAbstract_7997"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EffectiveIncomeTaxRateImpactFinalizationOfPriorYearTaxReturnCalculations" xlink:label="Locator_exc_EffectiveIncomeTaxRateImpactFinalizationOfPriorYearTaxReturnCalculations_7998"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_EffectiveIncomeTaxRateImpactAbstract_7997" xlink:to="Locator_exc_EffectiveIncomeTaxRateImpactFinalizationOfPriorYearTaxReturnCalculations_7998" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EffectiveIncomeTaxRateImpactAbstract" xlink:label="Locator_exc_EffectiveIncomeTaxRateImpactAbstract_7999"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EffectiveIncomeTaxRateImpactChangesInForecastedActivity" xlink:label="Locator_exc_EffectiveIncomeTaxRateImpactChangesInForecastedActivity_8000"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_EffectiveIncomeTaxRateImpactAbstract_7999" xlink:to="Locator_exc_EffectiveIncomeTaxRateImpactChangesInForecastedActivity_8000" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EffectiveIncomeTaxRateImpactAbstract" xlink:label="Locator_exc_EffectiveIncomeTaxRateImpactAbstract_8001"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EffectiveIncomeTaxRateImpactOther" xlink:label="Locator_exc_EffectiveIncomeTaxRateImpactOther_8002"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_EffectiveIncomeTaxRateImpactAbstract_8001" xlink:to="Locator_exc_EffectiveIncomeTaxRateImpactOther_8002" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_TaxEffectsOfTemporaryDifferencesLineItems" xlink:label="Locator_exc_TaxEffectsOfTemporaryDifferencesLineItems_7709"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_TaxEffectsOfTemporaryDifferencesTable" xlink:label="Locator_exc_TaxEffectsOfTemporaryDifferencesTable_7710"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="Locator_exc_TaxEffectsOfTemporaryDifferencesLineItems_7709" xlink:to="Locator_exc_TaxEffectsOfTemporaryDifferencesTable_7710" order="0.5" xbrldt:contextElement="segment" xbrldt:closed="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_TaxEffectsOfTemporaryDifferencesTable" xlink:label="Locator_exc_TaxEffectsOfTemporaryDifferencesTable_7891"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_7892"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_exc_TaxEffectsOfTemporaryDifferencesTable_7891" xlink:to="Locator_dei_LegalEntityAxis_7892" order="0.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_TaxEffectsOfTemporaryDifferencesLineItems" xlink:label="Locator_exc_TaxEffectsOfTemporaryDifferencesLineItems_8003"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment" xlink:label="Locator_us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment_8004"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_TaxEffectsOfTemporaryDifferencesLineItems_8003" xlink:to="Locator_us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment_8004" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_TaxEffectsOfTemporaryDifferencesLineItems" xlink:label="Locator_exc_TaxEffectsOfTemporaryDifferencesLineItems_8005"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DeferredTaxLiabilitiesStrandedAssetCostsRecovery" xlink:label="Locator_exc_DeferredTaxLiabilitiesStrandedAssetCostsRecovery_8006"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_TaxEffectsOfTemporaryDifferencesLineItems_8005" xlink:to="Locator_exc_DeferredTaxLiabilitiesStrandedAssetCostsRecovery_8006" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_TaxEffectsOfTemporaryDifferencesLineItems" xlink:label="Locator_exc_TaxEffectsOfTemporaryDifferencesLineItems_8007"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DeferredTaxLiabilitiesDerivatives" xlink:label="Locator_us-gaap_DeferredTaxLiabilitiesDerivatives_8008"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_TaxEffectsOfTemporaryDifferencesLineItems_8007" xlink:to="Locator_us-gaap_DeferredTaxLiabilitiesDerivatives_8008" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_TaxEffectsOfTemporaryDifferencesLineItems" xlink:label="Locator_exc_TaxEffectsOfTemporaryDifferencesLineItems_8009"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DeferredTaxLiabilitiesDeferredPensionAndOtherPostretirementBenefitObligation" xlink:label="Locator_exc_DeferredTaxLiabilitiesDeferredPensionAndOtherPostretirementBenefitObligation_8010"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_TaxEffectsOfTemporaryDifferencesLineItems_8009" xlink:to="Locator_exc_DeferredTaxLiabilitiesDeferredPensionAndOtherPostretirementBenefitObligation_8010" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_TaxEffectsOfTemporaryDifferencesLineItems" xlink:label="Locator_exc_TaxEffectsOfTemporaryDifferencesLineItems_8011"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets" xlink:label="Locator_us-gaap_DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets_8012"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_TaxEffectsOfTemporaryDifferencesLineItems_8011" xlink:to="Locator_us-gaap_DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets_8012" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_TaxEffectsOfTemporaryDifferencesLineItems" xlink:label="Locator_exc_TaxEffectsOfTemporaryDifferencesLineItems_8013"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DeferredTaxLiabilitiesNuclearDecommissioningActivities" xlink:label="Locator_exc_DeferredTaxLiabilitiesNuclearDecommissioningActivities_8014"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_TaxEffectsOfTemporaryDifferencesLineItems_8013" xlink:to="Locator_exc_DeferredTaxLiabilitiesNuclearDecommissioningActivities_8014" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_TaxEffectsOfTemporaryDifferencesLineItems" xlink:label="Locator_exc_TaxEffectsOfTemporaryDifferencesLineItems_8015"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DeferredTaxLiabilitiesDeferredExpenseDeferredFinancingCosts" xlink:label="Locator_us-gaap_DeferredTaxLiabilitiesDeferredExpenseDeferredFinancingCosts_8016"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_TaxEffectsOfTemporaryDifferencesLineItems_8015" xlink:to="Locator_us-gaap_DeferredTaxLiabilitiesDeferredExpenseDeferredFinancingCosts_8016" order="7.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_TaxEffectsOfTemporaryDifferencesLineItems" xlink:label="Locator_exc_TaxEffectsOfTemporaryDifferencesLineItems_8017"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsGoodwill" xlink:label="Locator_us-gaap_DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsGoodwill_8018"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_TaxEffectsOfTemporaryDifferencesLineItems_8017" xlink:to="Locator_us-gaap_DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsGoodwill_8018" order="8.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_TaxEffectsOfTemporaryDifferencesLineItems" xlink:label="Locator_exc_TaxEffectsOfTemporaryDifferencesLineItems_8019"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DeferredTaxLiabilitiesOther" xlink:label="Locator_us-gaap_DeferredTaxLiabilitiesOther_8020"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_TaxEffectsOfTemporaryDifferencesLineItems_8019" xlink:to="Locator_us-gaap_DeferredTaxLiabilitiesOther_8020" order="9.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_TaxEffectsOfTemporaryDifferencesLineItems" xlink:label="Locator_exc_TaxEffectsOfTemporaryDifferencesLineItems_8021"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DeferredIncomeTaxLiabilities" xlink:label="Locator_us-gaap_DeferredIncomeTaxLiabilities_8022"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_TaxEffectsOfTemporaryDifferencesLineItems_8021" xlink:to="Locator_us-gaap_DeferredIncomeTaxLiabilities_8022" order="10.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_TaxEffectsOfTemporaryDifferencesLineItems" xlink:label="Locator_exc_TaxEffectsOfTemporaryDifferencesLineItems_8023"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AccumulatedDeferredInvestmentTaxCredit" xlink:label="Locator_us-gaap_AccumulatedDeferredInvestmentTaxCredit_8024"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_TaxEffectsOfTemporaryDifferencesLineItems_8023" xlink:to="Locator_us-gaap_AccumulatedDeferredInvestmentTaxCredit_8024" order="11.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_TaxEffectsOfTemporaryDifferencesLineItems" xlink:label="Locator_exc_TaxEffectsOfTemporaryDifferencesLineItems_8025"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DeferredIncomeTaxLiabilitiesAndAccumulatedDeferredInvestmentTaxCredit" xlink:label="Locator_exc_DeferredIncomeTaxLiabilitiesAndAccumulatedDeferredInvestmentTaxCredit_8026"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_TaxEffectsOfTemporaryDifferencesLineItems_8025" xlink:to="Locator_exc_DeferredIncomeTaxLiabilitiesAndAccumulatedDeferredInvestmentTaxCredit_8026" order="12.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_IncomeTaxAdditionalNarrativeInformationLineItems" xlink:label="Locator_exc_IncomeTaxAdditionalNarrativeInformationLineItems_7741"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_IncomeTaxAdditionalNarrativeInformationTable" xlink:label="Locator_exc_IncomeTaxAdditionalNarrativeInformationTable_7742"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="Locator_exc_IncomeTaxAdditionalNarrativeInformationLineItems_7741" xlink:to="Locator_exc_IncomeTaxAdditionalNarrativeInformationTable_7742" order="0.5" xbrldt:contextElement="segment" xbrldt:closed="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_IncomeTaxAdditionalNarrativeInformationTable" xlink:label="Locator_exc_IncomeTaxAdditionalNarrativeInformationTable_7893"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_7894"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_exc_IncomeTaxAdditionalNarrativeInformationTable_7893" xlink:to="Locator_dei_LegalEntityAxis_7894" order="0.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_IncomeTaxAdditionalNarrativeInformationTable" xlink:label="Locator_exc_IncomeTaxAdditionalNarrativeInformationTable_7895"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_IncomeTaxAdditionalNarrativeInformationAnnualAxis" xlink:label="Locator_exc_IncomeTaxAdditionalNarrativeInformationAnnualAxis_7896"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_exc_IncomeTaxAdditionalNarrativeInformationTable_7895" xlink:to="Locator_exc_IncomeTaxAdditionalNarrativeInformationAnnualAxis_7896" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_IncomeTaxAdditionalNarrativeInformationAnnualAxis" xlink:label="Locator_exc_IncomeTaxAdditionalNarrativeInformationAnnualAxis_7593"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_IncomeTaxTimeFrameDomain" xlink:label="Locator_exc_IncomeTaxTimeFrameDomain_7594"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="Locator_exc_IncomeTaxAdditionalNarrativeInformationAnnualAxis_7593" xlink:to="Locator_exc_IncomeTaxTimeFrameDomain_7594" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_IncomeTaxAdditionalNarrativeInformationAnnualAxis" xlink:label="Locator_exc_IncomeTaxAdditionalNarrativeInformationAnnualAxis_7915"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_IncomeTaxTimeFrameDomain" xlink:label="Locator_exc_IncomeTaxTimeFrameDomain_7916"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_exc_IncomeTaxAdditionalNarrativeInformationAnnualAxis_7915" xlink:to="Locator_exc_IncomeTaxTimeFrameDomain_7916" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_IncomeTaxTimeFrameDomain" xlink:label="Locator_exc_IncomeTaxTimeFrameDomain_7917"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_MoreThanOneYearAndWithinFourYearsMember" xlink:label="Locator_exc_MoreThanOneYearAndWithinFourYearsMember_7918"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_IncomeTaxTimeFrameDomain_7917" xlink:to="Locator_exc_MoreThanOneYearAndWithinFourYearsMember_7918" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_IncomeTaxTimeFrameDomain" xlink:label="Locator_exc_IncomeTaxTimeFrameDomain_7919"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_MoreThanFourYearsAndWithinFourteenYearsMember" xlink:label="Locator_exc_MoreThanFourYearsAndWithinFourteenYearsMember_7920"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_IncomeTaxTimeFrameDomain_7919" xlink:to="Locator_exc_MoreThanFourYearsAndWithinFourteenYearsMember_7920" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_IncomeTaxTimeFrameDomain" xlink:label="Locator_exc_IncomeTaxTimeFrameDomain_7921"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_MoreThanFifteenYearsMember" xlink:label="Locator_exc_MoreThanFifteenYearsMember_7922"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_IncomeTaxTimeFrameDomain_7921" xlink:to="Locator_exc_MoreThanFifteenYearsMember_7922" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_IncomeTaxAdditionalNarrativeInformationLineItems" xlink:label="Locator_exc_IncomeTaxAdditionalNarrativeInformationLineItems_8027"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_UnrecognizedTaxBenefitsForWhichTimingOfUltimateBenefitsUncertainAbstract" xlink:label="Locator_exc_UnrecognizedTaxBenefitsForWhichTimingOfUltimateBenefitsUncertainAbstract_8028"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_IncomeTaxAdditionalNarrativeInformationLineItems_8027" xlink:to="Locator_exc_UnrecognizedTaxBenefitsForWhichTimingOfUltimateBenefitsUncertainAbstract_8028" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_UnrecognizedTaxBenefitsForWhichTimingOfUltimateBenefitsUncertainAbstract" xlink:label="Locator_exc_UnrecognizedTaxBenefitsForWhichTimingOfUltimateBenefitsUncertainAbstract_8029"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_UnrecognizedTaxBenefitsForWhichTimingOfUltimateBenefitsUncertain" xlink:label="Locator_exc_UnrecognizedTaxBenefitsForWhichTimingOfUltimateBenefitsUncertain_8030"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_UnrecognizedTaxBenefitsForWhichTimingOfUltimateBenefitsUncertainAbstract_8029" xlink:to="Locator_exc_UnrecognizedTaxBenefitsForWhichTimingOfUltimateBenefitsUncertain_8030" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_IncomeTaxAdditionalNarrativeInformationLineItems" xlink:label="Locator_exc_IncomeTaxAdditionalNarrativeInformationLineItems_8031"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRateAbstract" xlink:label="Locator_exc_UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRateAbstract_8032"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_IncomeTaxAdditionalNarrativeInformationLineItems_8031" xlink:to="Locator_exc_UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRateAbstract_8032" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRateAbstract" xlink:label="Locator_exc_UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRateAbstract_8033"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate" xlink:label="Locator_us-gaap_UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate_8034"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRateAbstract_8033" xlink:to="Locator_us-gaap_UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate_8034" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_IncomeTaxAdditionalNarrativeInformationLineItems" xlink:label="Locator_exc_IncomeTaxAdditionalNarrativeInformationLineItems_8035"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NetInterestRelatedToUncertainTaxPositionsAbstract" xlink:label="Locator_exc_NetInterestRelatedToUncertainTaxPositionsAbstract_8036"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_IncomeTaxAdditionalNarrativeInformationLineItems_8035" xlink:to="Locator_exc_NetInterestRelatedToUncertainTaxPositionsAbstract_8036" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NetInterestRelatedToUncertainTaxPositionsAbstract" xlink:label="Locator_exc_NetInterestRelatedToUncertainTaxPositionsAbstract_8037"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NetInterestReceivablePayableRelatedToUncertainTaxPositions" xlink:label="Locator_exc_NetInterestReceivablePayableRelatedToUncertainTaxPositions_8038"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_NetInterestRelatedToUncertainTaxPositionsAbstract_8037" xlink:to="Locator_exc_NetInterestReceivablePayableRelatedToUncertainTaxPositions_8038" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NetInterestRelatedToUncertainTaxPositionsAbstract" xlink:label="Locator_exc_NetInterestRelatedToUncertainTaxPositionsAbstract_8039"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NetInterestIncomeExpenseRelatedToUncertainTaxPositions" xlink:label="Locator_exc_NetInterestIncomeExpenseRelatedToUncertainTaxPositions_8040"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_NetInterestRelatedToUncertainTaxPositionsAbstract_8039" xlink:to="Locator_exc_NetInterestIncomeExpenseRelatedToUncertainTaxPositions_8040" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_IncomeTaxAdditionalNarrativeInformationLineItems" xlink:label="Locator_exc_IncomeTaxAdditionalNarrativeInformationLineItems_8041"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NuclearDecommissioningTrustFundSpecialTransferTaxDeductionAbstract" xlink:label="Locator_exc_NuclearDecommissioningTrustFundSpecialTransferTaxDeductionAbstract_8042"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_IncomeTaxAdditionalNarrativeInformationLineItems_8041" xlink:to="Locator_exc_NuclearDecommissioningTrustFundSpecialTransferTaxDeductionAbstract_8042" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NuclearDecommissioningTrustFundSpecialTransferTaxDeductionAbstract" xlink:label="Locator_exc_NuclearDecommissioningTrustFundSpecialTransferTaxDeductionAbstract_8043"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NuclearDecommissioningTrustFundSpecialTransferTaxDeductionBenefit" xlink:label="Locator_exc_NuclearDecommissioningTrustFundSpecialTransferTaxDeductionBenefit_8044"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_NuclearDecommissioningTrustFundSpecialTransferTaxDeductionAbstract_8043" xlink:to="Locator_exc_NuclearDecommissioningTrustFundSpecialTransferTaxDeductionBenefit_8044" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NuclearDecommissioningTrustFundSpecialTransferTaxDeductionAbstract" xlink:label="Locator_exc_NuclearDecommissioningTrustFundSpecialTransferTaxDeductionAbstract_8045"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NuclearDecommissioningTrustFundSpecialTransferTaxDeductionEstimatedFutureBenefit" xlink:label="Locator_exc_NuclearDecommissioningTrustFundSpecialTransferTaxDeductionEstimatedFutureBenefit_8046"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_NuclearDecommissioningTrustFundSpecialTransferTaxDeductionAbstract_8045" xlink:to="Locator_exc_NuclearDecommissioningTrustFundSpecialTransferTaxDeductionEstimatedFutureBenefit_8046" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_IncomeTaxAdditionalNarrativeInformationLineItems" xlink:label="Locator_exc_IncomeTaxAdditionalNarrativeInformationLineItems_8047"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_TaxMethodOfAccountingForRepairsAbstract" xlink:label="Locator_exc_TaxMethodOfAccountingForRepairsAbstract_8048"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_IncomeTaxAdditionalNarrativeInformationLineItems_8047" xlink:to="Locator_exc_TaxMethodOfAccountingForRepairsAbstract_8048" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_TaxMethodOfAccountingForRepairsAbstract" xlink:label="Locator_exc_TaxMethodOfAccountingForRepairsAbstract_8049"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RepairCostsIncomeTaxCashImpact" xlink:label="Locator_exc_RepairCostsIncomeTaxCashImpact_8050"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_TaxMethodOfAccountingForRepairsAbstract_8049" xlink:to="Locator_exc_RepairCostsIncomeTaxCashImpact_8050" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_TaxMethodOfAccountingForRepairsAbstract" xlink:label="Locator_exc_TaxMethodOfAccountingForRepairsAbstract_8051"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RepairCostsIncomeTax" xlink:label="Locator_exc_RepairCostsIncomeTax_8052"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_TaxMethodOfAccountingForRepairsAbstract_8051" xlink:to="Locator_exc_RepairCostsIncomeTax_8052" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_IncomeTaxAdditionalNarrativeInformationLineItems" xlink:label="Locator_exc_IncomeTaxAdditionalNarrativeInformationLineItems_8053"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OtherTaxMattersAbstract" xlink:label="Locator_exc_OtherTaxMattersAbstract_8054"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_IncomeTaxAdditionalNarrativeInformationLineItems_8053" xlink:to="Locator_exc_OtherTaxMattersAbstract_8054" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OtherTaxMattersAbstract" xlink:label="Locator_exc_OtherTaxMattersAbstract_8055"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SaleOfFossilGeneratingAssetsAbstract" xlink:label="Locator_exc_SaleOfFossilGeneratingAssetsAbstract_8056"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_OtherTaxMattersAbstract_8055" xlink:to="Locator_exc_SaleOfFossilGeneratingAssetsAbstract_8056" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SaleOfFossilGeneratingAssetsAbstract" xlink:label="Locator_exc_SaleOfFossilGeneratingAssetsAbstract_8057"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DeferredIncomeTaxGainOnSaleOfAssets" xlink:label="Locator_exc_DeferredIncomeTaxGainOnSaleOfAssets_8058"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_SaleOfFossilGeneratingAssetsAbstract_8057" xlink:to="Locator_exc_DeferredIncomeTaxGainOnSaleOfAssets_8058" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SaleOfFossilGeneratingAssetsAbstract" xlink:label="Locator_exc_SaleOfFossilGeneratingAssetsAbstract_8059"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DeferredIncomeTaxGainInVoluntaryConversion" xlink:label="Locator_exc_DeferredIncomeTaxGainInVoluntaryConversion_8060"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_SaleOfFossilGeneratingAssetsAbstract_8059" xlink:to="Locator_exc_DeferredIncomeTaxGainInVoluntaryConversion_8060" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SaleOfFossilGeneratingAssetsAbstract" xlink:label="Locator_exc_SaleOfFossilGeneratingAssetsAbstract_8061"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DeferredIncomeTaxGainLikeKindExchange" xlink:label="Locator_exc_DeferredIncomeTaxGainLikeKindExchange_8062"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_SaleOfFossilGeneratingAssetsAbstract_8061" xlink:to="Locator_exc_DeferredIncomeTaxGainLikeKindExchange_8062" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SaleOfFossilGeneratingAssetsAbstract" xlink:label="Locator_exc_SaleOfFossilGeneratingAssetsAbstract_8063"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesExpense" xlink:label="Locator_us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesExpense_8064"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_SaleOfFossilGeneratingAssetsAbstract_8063" xlink:to="Locator_us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesExpense_8064" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SaleOfFossilGeneratingAssetsAbstract" xlink:label="Locator_exc_SaleOfFossilGeneratingAssetsAbstract_8065"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_IncomeTaxAndPenaltiesFromPotentialSettleWithTaxingAuthority" xlink:label="Locator_exc_IncomeTaxAndPenaltiesFromPotentialSettleWithTaxingAuthority_8066"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_SaleOfFossilGeneratingAssetsAbstract_8065" xlink:to="Locator_exc_IncomeTaxAndPenaltiesFromPotentialSettleWithTaxingAuthority_8066" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SaleOfFossilGeneratingAssetsAbstract" xlink:label="Locator_exc_SaleOfFossilGeneratingAssetsAbstract_8067"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_IncomeTaxExaminationInterestExpenseFromPotentialSettlementWithTaxingAuthority" xlink:label="Locator_exc_IncomeTaxExaminationInterestExpenseFromPotentialSettlementWithTaxingAuthority_8068"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_SaleOfFossilGeneratingAssetsAbstract_8067" xlink:to="Locator_exc_IncomeTaxExaminationInterestExpenseFromPotentialSettlementWithTaxingAuthority_8068" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SaleOfFossilGeneratingAssetsAbstract" xlink:label="Locator_exc_SaleOfFossilGeneratingAssetsAbstract_8069"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_UnrecognizedTaxBenefitsIncomeTaxPenaltiesExpenseInvoluntaryConversion" xlink:label="Locator_exc_UnrecognizedTaxBenefitsIncomeTaxPenaltiesExpenseInvoluntaryConversion_8070"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_SaleOfFossilGeneratingAssetsAbstract_8069" xlink:to="Locator_exc_UnrecognizedTaxBenefitsIncomeTaxPenaltiesExpenseInvoluntaryConversion_8070" order="7.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SaleOfFossilGeneratingAssetsAbstract" xlink:label="Locator_exc_SaleOfFossilGeneratingAssetsAbstract_8071"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_UnrecognizedTaxBenefitsIncomeTaxPenaltiesExpenseLikeKindExchange" xlink:label="Locator_exc_UnrecognizedTaxBenefitsIncomeTaxPenaltiesExpenseLikeKindExchange_8072"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_SaleOfFossilGeneratingAssetsAbstract_8071" xlink:to="Locator_exc_UnrecognizedTaxBenefitsIncomeTaxPenaltiesExpenseLikeKindExchange_8072" order="8.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OtherTaxMattersAbstract" xlink:label="Locator_exc_OtherTaxMattersAbstract_8073"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CompetitiveTransitionChargesAbstract" xlink:label="Locator_exc_CompetitiveTransitionChargesAbstract_8074"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_OtherTaxMattersAbstract_8073" xlink:to="Locator_exc_CompetitiveTransitionChargesAbstract_8074" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CompetitiveTransitionChargesAbstract" xlink:label="Locator_exc_CompetitiveTransitionChargesAbstract_8075"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CompetitiveTransitionChargesCollected" xlink:label="Locator_exc_CompetitiveTransitionChargesCollected_8076"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_CompetitiveTransitionChargesAbstract_8075" xlink:to="Locator_exc_CompetitiveTransitionChargesCollected_8076" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CompetitiveTransitionChargesAbstract" xlink:label="Locator_exc_CompetitiveTransitionChargesAbstract_8077"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_StrandedCostsPermittedCollection" xlink:label="Locator_exc_StrandedCostsPermittedCollection_8078"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_CompetitiveTransitionChargesAbstract_8077" xlink:to="Locator_exc_StrandedCostsPermittedCollection_8078" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_IncomeTaxAdditionalNarrativeInformationLineItems" xlink:label="Locator_exc_IncomeTaxAdditionalNarrativeInformationLineItems_8079"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_TaxRemeasurementAbstract" xlink:label="Locator_exc_TaxRemeasurementAbstract_8080"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_IncomeTaxAdditionalNarrativeInformationLineItems_8079" xlink:to="Locator_exc_TaxRemeasurementAbstract_8080" order="7.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_TaxRemeasurementAbstract" xlink:label="Locator_exc_TaxRemeasurementAbstract_8081"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RemeasurementInterestExpense" xlink:label="Locator_exc_RemeasurementInterestExpense_8082"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_TaxRemeasurementAbstract_8081" xlink:to="Locator_exc_RemeasurementInterestExpense_8082" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_TaxRemeasurementAbstract" xlink:label="Locator_exc_TaxRemeasurementAbstract_8083"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RemeasurementTaxExpenseBenefit" xlink:label="Locator_exc_RemeasurementTaxExpenseBenefit_8084"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_TaxRemeasurementAbstract_8083" xlink:to="Locator_exc_RemeasurementTaxExpenseBenefit_8084" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_IncomeTaxAdditionalNarrativeInformationLineItems" xlink:label="Locator_exc_IncomeTaxAdditionalNarrativeInformationLineItems_8085"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_TaxSettlementAbstract" xlink:label="Locator_exc_TaxSettlementAbstract_8086"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_IncomeTaxAdditionalNarrativeInformationLineItems_8085" xlink:to="Locator_exc_TaxSettlementAbstract_8086" order="8.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_TaxSettlementAbstract" xlink:label="Locator_exc_TaxSettlementAbstract_8087"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PreliminaryTaxSettlementTaxAssessed" xlink:label="Locator_exc_PreliminaryTaxSettlementTaxAssessed_8088"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_TaxSettlementAbstract_8087" xlink:to="Locator_exc_PreliminaryTaxSettlementTaxAssessed_8088" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_TaxSettlementAbstract" xlink:label="Locator_exc_TaxSettlementAbstract_8089"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PreliminaryTaxSettlementRefundsExpected" xlink:label="Locator_exc_PreliminaryTaxSettlementRefundsExpected_8090"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_TaxSettlementAbstract_8089" xlink:to="Locator_exc_PreliminaryTaxSettlementRefundsExpected_8090" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_TaxSettlementAbstract" xlink:label="Locator_exc_TaxSettlementAbstract_8091"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_IncomeTaxExaminationLiabilityRefundAdjustmentFromSettlementWithTaxingAuthority" xlink:label="Locator_us-gaap_IncomeTaxExaminationLiabilityRefundAdjustmentFromSettlementWithTaxingAuthority_8092"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_TaxSettlementAbstract_8091" xlink:to="Locator_us-gaap_IncomeTaxExaminationLiabilityRefundAdjustmentFromSettlementWithTaxingAuthority_8092" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_TaxSettlementAbstract" xlink:label="Locator_exc_TaxSettlementAbstract_8093"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PreliminarySettlementPaymentToIrs" xlink:label="Locator_exc_PreliminarySettlementPaymentToIrs_8094"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_TaxSettlementAbstract_8093" xlink:to="Locator_exc_PreliminarySettlementPaymentToIrs_8094" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_IncomeTaxAdditionalNarrativeInformationLineItems" xlink:label="Locator_exc_IncomeTaxAdditionalNarrativeInformationLineItems_8095"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_StateTaxLegislationAbstract" xlink:label="Locator_exc_StateTaxLegislationAbstract_8096"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_IncomeTaxAdditionalNarrativeInformationLineItems_8095" xlink:to="Locator_exc_StateTaxLegislationAbstract_8096" order="9.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_StateTaxLegislationAbstract" xlink:label="Locator_exc_StateTaxLegislationAbstract_8097"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EffectiveIncomeTaxRateReconciliationAtStateStatutoryIncomeTaxRate" xlink:label="Locator_exc_EffectiveIncomeTaxRateReconciliationAtStateStatutoryIncomeTaxRate_8098"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_StateTaxLegislationAbstract_8097" xlink:to="Locator_exc_EffectiveIncomeTaxRateReconciliationAtStateStatutoryIncomeTaxRate_8098" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_StateTaxLegislationAbstract" xlink:label="Locator_exc_StateTaxLegislationAbstract_8099"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EffectiveIncomeTaxRateReconciliationChangeInEnactedStateStatutoryIncomeTaxRate" xlink:label="Locator_exc_EffectiveIncomeTaxRateReconciliationChangeInEnactedStateStatutoryIncomeTaxRate_8100"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_StateTaxLegislationAbstract_8099" xlink:to="Locator_exc_EffectiveIncomeTaxRateReconciliationChangeInEnactedStateStatutoryIncomeTaxRate_8100" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_StateTaxLegislationAbstract" xlink:label="Locator_exc_StateTaxLegislationAbstract_8101"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EffectiveIncomeTaxRateReconciliationImpactOfChangeInEnactedStateStatutoryIncomeTaxRate" xlink:label="Locator_exc_EffectiveIncomeTaxRateReconciliationImpactOfChangeInEnactedStateStatutoryIncomeTaxRate_8102"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_StateTaxLegislationAbstract_8101" xlink:to="Locator_exc_EffectiveIncomeTaxRateReconciliationImpactOfChangeInEnactedStateStatutoryIncomeTaxRate_8102" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_StateTaxLegislationAbstract" xlink:label="Locator_exc_StateTaxLegislationAbstract_8103"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DeferredOtherTaxExpenseBenefit" xlink:label="Locator_us-gaap_DeferredOtherTaxExpenseBenefit_8104"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_StateTaxLegislationAbstract_8103" xlink:to="Locator_us-gaap_DeferredOtherTaxExpenseBenefit_8104" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_StateTaxLegislationAbstract" xlink:label="Locator_exc_StateTaxLegislationAbstract_8105"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DeferredTaxLiabilitiesRegulatoryAssets" xlink:label="Locator_us-gaap_DeferredTaxLiabilitiesRegulatoryAssets_8106"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_StateTaxLegislationAbstract_8105" xlink:to="Locator_us-gaap_DeferredTaxLiabilitiesRegulatoryAssets_8106" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_IncomeTaxAdditionalNarrativeInformationLineItems" xlink:label="Locator_exc_IncomeTaxAdditionalNarrativeInformationLineItems_8107"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DeferredStateAndLocalIncomeTaxExpenseBenefitStateTaxApportionmentAbstract" xlink:label="Locator_exc_DeferredStateAndLocalIncomeTaxExpenseBenefitStateTaxApportionmentAbstract_8108"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_IncomeTaxAdditionalNarrativeInformationLineItems_8107" xlink:to="Locator_exc_DeferredStateAndLocalIncomeTaxExpenseBenefitStateTaxApportionmentAbstract_8108" order="10.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DeferredStateAndLocalIncomeTaxExpenseBenefitStateTaxApportionmentAbstract" xlink:label="Locator_exc_DeferredStateAndLocalIncomeTaxExpenseBenefitStateTaxApportionmentAbstract_8109"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DeferredStateAndLocalIncomeTaxExpenseBenefitStateTaxApportionment" xlink:label="Locator_exc_DeferredStateAndLocalIncomeTaxExpenseBenefitStateTaxApportionment_8110"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_DeferredStateAndLocalIncomeTaxExpenseBenefitStateTaxApportionmentAbstract_8109" xlink:to="Locator_exc_DeferredStateAndLocalIncomeTaxExpenseBenefitStateTaxApportionment_8110" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DeferredStateAndLocalIncomeTaxExpenseBenefitStateTaxApportionmentAbstract" xlink:label="Locator_exc_DeferredStateAndLocalIncomeTaxExpenseBenefitStateTaxApportionmentAbstract_8111"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_GrossDeferredStateAndLocalIncomeTaxExpenseAssetStateTaxApportionment" xlink:label="Locator_exc_GrossDeferredStateAndLocalIncomeTaxExpenseAssetStateTaxApportionment_8112"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_DeferredStateAndLocalIncomeTaxExpenseBenefitStateTaxApportionmentAbstract_8111" xlink:to="Locator_exc_GrossDeferredStateAndLocalIncomeTaxExpenseAssetStateTaxApportionment_8112" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DeferredStateAndLocalIncomeTaxExpenseBenefitStateTaxApportionmentAbstract" xlink:label="Locator_exc_DeferredStateAndLocalIncomeTaxExpenseBenefitStateTaxApportionmentAbstract_8113"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_GrossDeferredStateAndLocalIncomeTaxExpenseLiabilityStateTaxApportionment" xlink:label="Locator_exc_GrossDeferredStateAndLocalIncomeTaxExpenseLiabilityStateTaxApportionment_8114"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_DeferredStateAndLocalIncomeTaxExpenseBenefitStateTaxApportionmentAbstract_8113" xlink:to="Locator_exc_GrossDeferredStateAndLocalIncomeTaxExpenseLiabilityStateTaxApportionment_8114" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_IncomeTaxAdditionalNarrativeInformationLineItems" xlink:label="Locator_exc_IncomeTaxAdditionalNarrativeInformationLineItems_8115"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ElectricTransmissionDistributionPropertyRepairsDeductionAbstract" xlink:label="Locator_exc_ElectricTransmissionDistributionPropertyRepairsDeductionAbstract_8116"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_IncomeTaxAdditionalNarrativeInformationLineItems_8115" xlink:to="Locator_exc_ElectricTransmissionDistributionPropertyRepairsDeductionAbstract_8116" order="11.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ElectricTransmissionDistributionPropertyRepairsDeductionAbstract" xlink:label="Locator_exc_ElectricTransmissionDistributionPropertyRepairsDeductionAbstract_8117"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ElectricTransmissionDistributionPropertyRepairsDeductionTaxBenefitExpense" xlink:label="Locator_exc_ElectricTransmissionDistributionPropertyRepairsDeductionTaxBenefitExpense_8118"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_ElectricTransmissionDistributionPropertyRepairsDeductionAbstract_8117" xlink:to="Locator_exc_ElectricTransmissionDistributionPropertyRepairsDeductionTaxBenefitExpense_8118" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ElectricTransmissionDistributionPropertyRepairsDeductionAbstract" xlink:label="Locator_exc_ElectricTransmissionDistributionPropertyRepairsDeductionAbstract_8119"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ElectricTransmissionDistributionPropertyRepairsDeductionCashBenefitDetriment" xlink:label="Locator_exc_ElectricTransmissionDistributionPropertyRepairsDeductionCashBenefitDetriment_8120"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_ElectricTransmissionDistributionPropertyRepairsDeductionAbstract_8119" xlink:to="Locator_exc_ElectricTransmissionDistributionPropertyRepairsDeductionCashBenefitDetriment_8120" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_IncomeTaxAdditionalNarrativeInformationLineItems" xlink:label="Locator_exc_IncomeTaxAdditionalNarrativeInformationLineItems_8121"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_IntercompanyTaxSharingAgreementAllocationOfFederalTaxBenefitsAbstract" xlink:label="Locator_exc_IntercompanyTaxSharingAgreementAllocationOfFederalTaxBenefitsAbstract_8122"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_IncomeTaxAdditionalNarrativeInformationLineItems_8121" xlink:to="Locator_exc_IntercompanyTaxSharingAgreementAllocationOfFederalTaxBenefitsAbstract_8122" order="12.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_IntercompanyTaxSharingAgreementAllocationOfFederalTaxBenefitsAbstract" xlink:label="Locator_exc_IntercompanyTaxSharingAgreementAllocationOfFederalTaxBenefitsAbstract_8123"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_IntercompanyTaxSharingAgreementAllocationOfFederalTaxBenefits" xlink:label="Locator_exc_IntercompanyTaxSharingAgreementAllocationOfFederalTaxBenefits_8124"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_IntercompanyTaxSharingAgreementAllocationOfFederalTaxBenefitsAbstract_8123" xlink:to="Locator_exc_IntercompanyTaxSharingAgreementAllocationOfFederalTaxBenefits_8124" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_IncomeTaxAdditionalNarrativeInformationLineItems" xlink:label="Locator_exc_IncomeTaxAdditionalNarrativeInformationLineItems_8125"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_StateTaxBonusDepreciationPercent" xlink:label="Locator_exc_StateTaxBonusDepreciationPercent_8126"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_IncomeTaxAdditionalNarrativeInformationLineItems_8125" xlink:to="Locator_exc_StateTaxBonusDepreciationPercent_8126" order="13.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_IncomeTaxAdditionalNarrativeInformationLineItems" xlink:label="Locator_exc_IncomeTaxAdditionalNarrativeInformationLineItems_8127"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_StateTaxBonusDepreciationExpenseBenefit" xlink:label="Locator_exc_StateTaxBonusDepreciationExpenseBenefit_8128"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_IncomeTaxAdditionalNarrativeInformationLineItems_8127" xlink:to="Locator_exc_StateTaxBonusDepreciationExpenseBenefit_8128" order="14.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_IncomeTaxAdditionalNarrativeInformationLineItems" xlink:label="Locator_exc_IncomeTaxAdditionalNarrativeInformationLineItems_8129"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_IntercompanyNonCashAllocationOfTaxBenefit" xlink:label="Locator_exc_IntercompanyNonCashAllocationOfTaxBenefit_8130"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_IncomeTaxAdditionalNarrativeInformationLineItems_8129" xlink:to="Locator_exc_IntercompanyNonCashAllocationOfTaxBenefit_8130" order="15.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_IncomeTaxContingencyLineItems" xlink:label="Locator_us-gaap_IncomeTaxContingencyLineItems_7643"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_IncomeTaxContingencyTable" xlink:label="Locator_us-gaap_IncomeTaxContingencyTable_7644"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="Locator_us-gaap_IncomeTaxContingencyLineItems_7643" xlink:to="Locator_us-gaap_IncomeTaxContingencyTable_7644" order="0.5" xbrldt:contextElement="segment" xbrldt:closed="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_IncomeTaxContingencyTable" xlink:label="Locator_us-gaap_IncomeTaxContingencyTable_7881"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_7882"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_us-gaap_IncomeTaxContingencyTable_7881" xlink:to="Locator_dei_LegalEntityAxis_7882" order="0.0"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_IncomeTaxContingencyLineItems" xlink:label="Locator_us-gaap_IncomeTaxContingencyLineItems_7923"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ReconciliationOfUnrecognizedTaxBenefitsExcludingAmountsPertainingToExaminedTaxReturnsRollForward" xlink:label="Locator_us-gaap_ReconciliationOfUnrecognizedTaxBenefitsExcludingAmountsPertainingToExaminedTaxReturnsRollForward_7924"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_IncomeTaxContingencyLineItems_7923" xlink:to="Locator_us-gaap_ReconciliationOfUnrecognizedTaxBenefitsExcludingAmountsPertainingToExaminedTaxReturnsRollForward_7924" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ReconciliationOfUnrecognizedTaxBenefitsExcludingAmountsPertainingToExaminedTaxReturnsRollForward" xlink:label="Locator_us-gaap_ReconciliationOfUnrecognizedTaxBenefitsExcludingAmountsPertainingToExaminedTaxReturnsRollForward_7925"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_UnrecognizedTaxBenefits" xlink:label="Locator_us-gaap_UnrecognizedTaxBenefits_7926"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_ReconciliationOfUnrecognizedTaxBenefitsExcludingAmountsPertainingToExaminedTaxReturnsRollForward_7925" xlink:to="Locator_us-gaap_UnrecognizedTaxBenefits_7926" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ReconciliationOfUnrecognizedTaxBenefitsExcludingAmountsPertainingToExaminedTaxReturnsRollForward" xlink:label="Locator_us-gaap_ReconciliationOfUnrecognizedTaxBenefitsExcludingAmountsPertainingToExaminedTaxReturnsRollForward_7927"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions" xlink:label="Locator_us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions_7928"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_ReconciliationOfUnrecognizedTaxBenefitsExcludingAmountsPertainingToExaminedTaxReturnsRollForward_7927" xlink:to="Locator_us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions_7928" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ReconciliationOfUnrecognizedTaxBenefitsExcludingAmountsPertainingToExaminedTaxReturnsRollForward" xlink:label="Locator_us-gaap_ReconciliationOfUnrecognizedTaxBenefitsExcludingAmountsPertainingToExaminedTaxReturnsRollForward_7929"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromCurrentPeriodTaxPositions" xlink:label="Locator_us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromCurrentPeriodTaxPositions_7930"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_ReconciliationOfUnrecognizedTaxBenefitsExcludingAmountsPertainingToExaminedTaxReturnsRollForward_7929" xlink:to="Locator_us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromCurrentPeriodTaxPositions_7930" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ReconciliationOfUnrecognizedTaxBenefitsExcludingAmountsPertainingToExaminedTaxReturnsRollForward" xlink:label="Locator_us-gaap_ReconciliationOfUnrecognizedTaxBenefitsExcludingAmountsPertainingToExaminedTaxReturnsRollForward_7931"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_UnrecognizedTaxBenefitsIncreasesDecreasesOnlyAffectingTiming" xlink:label="Locator_exc_UnrecognizedTaxBenefitsIncreasesDecreasesOnlyAffectingTiming_7932"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_ReconciliationOfUnrecognizedTaxBenefitsExcludingAmountsPertainingToExaminedTaxReturnsRollForward_7931" xlink:to="Locator_exc_UnrecognizedTaxBenefitsIncreasesDecreasesOnlyAffectingTiming_7932" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ReconciliationOfUnrecognizedTaxBenefitsExcludingAmountsPertainingToExaminedTaxReturnsRollForward" xlink:label="Locator_us-gaap_ReconciliationOfUnrecognizedTaxBenefitsExcludingAmountsPertainingToExaminedTaxReturnsRollForward_7933"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions" xlink:label="Locator_us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions_7934"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_ReconciliationOfUnrecognizedTaxBenefitsExcludingAmountsPertainingToExaminedTaxReturnsRollForward_7933" xlink:to="Locator_us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions_7934" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ReconciliationOfUnrecognizedTaxBenefitsExcludingAmountsPertainingToExaminedTaxReturnsRollForward" xlink:label="Locator_us-gaap_ReconciliationOfUnrecognizedTaxBenefitsExcludingAmountsPertainingToExaminedTaxReturnsRollForward_7935"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions" xlink:label="Locator_us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions_7936"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_ReconciliationOfUnrecognizedTaxBenefitsExcludingAmountsPertainingToExaminedTaxReturnsRollForward_7935" xlink:to="Locator_us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions_7936" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ReconciliationOfUnrecognizedTaxBenefitsExcludingAmountsPertainingToExaminedTaxReturnsRollForward" xlink:label="Locator_us-gaap_ReconciliationOfUnrecognizedTaxBenefitsExcludingAmountsPertainingToExaminedTaxReturnsRollForward_7937"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities" xlink:label="Locator_us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities_7938"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_ReconciliationOfUnrecognizedTaxBenefitsExcludingAmountsPertainingToExaminedTaxReturnsRollForward_7937" xlink:to="Locator_us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities_7938" order="7.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ReconciliationOfUnrecognizedTaxBenefitsExcludingAmountsPertainingToExaminedTaxReturnsRollForward" xlink:label="Locator_us-gaap_ReconciliationOfUnrecognizedTaxBenefitsExcludingAmountsPertainingToExaminedTaxReturnsRollForward_7939"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations" xlink:label="Locator_us-gaap_UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations_7940"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_ReconciliationOfUnrecognizedTaxBenefitsExcludingAmountsPertainingToExaminedTaxReturnsRollForward_7939" xlink:to="Locator_us-gaap_UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations_7940" order="8.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OperatingLossCarryforwardsLineItems" xlink:label="Locator_us-gaap_OperatingLossCarryforwardsLineItems_7669"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OperatingLossCarryforwardsTable" xlink:label="Locator_us-gaap_OperatingLossCarryforwardsTable_7670"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="Locator_us-gaap_OperatingLossCarryforwardsLineItems_7669" xlink:to="Locator_us-gaap_OperatingLossCarryforwardsTable_7670" order="0.5" xbrldt:contextElement="segment" xbrldt:closed="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OperatingLossCarryforwardsTable" xlink:label="Locator_us-gaap_OperatingLossCarryforwardsTable_7883"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_7884"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_us-gaap_OperatingLossCarryforwardsTable_7883" xlink:to="Locator_dei_LegalEntityAxis_7884" order="0.0"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OperatingLossCarryforwardsLineItems" xlink:label="Locator_us-gaap_OperatingLossCarryforwardsLineItems_7941"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal" xlink:label="Locator_us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal_7942"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_OperatingLossCarryforwardsLineItems_7941" xlink:to="Locator_us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal_7942" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OperatingLossCarryforwardsLineItems" xlink:label="Locator_us-gaap_OperatingLossCarryforwardsLineItems_7943"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocalDeferredTaxes" xlink:label="Locator_exc_DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocalDeferredTaxes_7944"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_OperatingLossCarryforwardsLineItems_7943" xlink:to="Locator_exc_DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocalDeferredTaxes_7944" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OperatingLossCarryforwardsLineItems" xlink:label="Locator_us-gaap_OperatingLossCarryforwardsLineItems_7945"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocalValuationAllowance" xlink:label="Locator_exc_DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocalValuationAllowance_7946"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_OperatingLossCarryforwardsLineItems_7945" xlink:to="Locator_exc_DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocalValuationAllowance_7946" order="3.0" xbrldt:usable="true"/> |
| | </definitionLink> |
| <definitionLink xlink:type="extended" xlink:role="http://exeloncorp.com/role/DisclosureMergerAndAcquisitionsExelonAndGeneration"> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_8209"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_8210"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_dei_LegalEntityAxis_8209" xlink:to="Locator_dei_EntityDomain_8210" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_8211"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ExelonGenerationCoLLCMember" xlink:label="Locator_exc_ExelonGenerationCoLLCMember_8212"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_8211" xlink:to="Locator_exc_ExelonGenerationCoLLCMember_8212" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AcquisitionsLineItems" xlink:label="Locator_exc_AcquisitionsLineItems_8205"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AcquisitionsTable" xlink:label="Locator_exc_AcquisitionsTable_8206"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="Locator_exc_AcquisitionsLineItems_8205" xlink:to="Locator_exc_AcquisitionsTable_8206" order="0.5" xbrldt:contextElement="segment" xbrldt:closed="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AcquisitionsTable" xlink:label="Locator_exc_AcquisitionsTable_8207"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_8208"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_exc_AcquisitionsTable_8207" xlink:to="Locator_dei_LegalEntityAxis_8208" order="0.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AcquisitionsLineItems" xlink:label="Locator_exc_AcquisitionsLineItems_8213"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessCombinationDisclosureTextBlock" xlink:label="Locator_us-gaap_BusinessCombinationDisclosureTextBlock_8214"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_AcquisitionsLineItems_8213" xlink:to="Locator_us-gaap_BusinessCombinationDisclosureTextBlock_8214" order="1.0" xbrldt:usable="true"/> |
| | </definitionLink> |
| <definitionLink xlink:type="extended" xlink:role="http://exeloncorp.com/role/DisclosureMergerAndAcquisitionsDetails"> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_8585"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_8586"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_dei_LegalEntityAxis_8585" xlink:to="Locator_dei_EntityDomain_8586" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_8587"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ExelonGenerationCoLLCMember" xlink:label="Locator_exc_ExelonGenerationCoLLCMember_8588"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_8587" xlink:to="Locator_exc_ExelonGenerationCoLLCMember_8588" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_8589"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CommonwealthEdisonCoMember" xlink:label="Locator_exc_CommonwealthEdisonCoMember_8590"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_8589" xlink:to="Locator_exc_CommonwealthEdisonCoMember_8590" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_8591"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PecoEnergyCoMember" xlink:label="Locator_exc_PecoEnergyCoMember_8592"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_8591" xlink:to="Locator_exc_PecoEnergyCoMember_8592" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_8593"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BaltimoreGasAndElectricCompanyMember" xlink:label="Locator_exc_BaltimoreGasAndElectricCompanyMember_8594"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_8593" xlink:to="Locator_exc_BaltimoreGasAndElectricCompanyMember_8594" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RangeAxis" xlink:label="Locator_us-gaap_RangeAxis_8235"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RangeMember" xlink:label="Locator_us-gaap_RangeMember_8236"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="Locator_us-gaap_RangeAxis_8235" xlink:to="Locator_us-gaap_RangeMember_8236" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RangeAxis" xlink:label="Locator_us-gaap_RangeAxis_8649"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RangeMember" xlink:label="Locator_us-gaap_RangeMember_8650"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_us-gaap_RangeAxis_8649" xlink:to="Locator_us-gaap_RangeMember_8650" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RangeMember" xlink:label="Locator_us-gaap_RangeMember_8653"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_MaximumMember" xlink:label="Locator_us-gaap_MaximumMember_8654"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RangeMember_8653" xlink:to="Locator_us-gaap_MaximumMember_8654" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RangeMember" xlink:label="Locator_us-gaap_RangeMember_8651"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_MinimumMember" xlink:label="Locator_us-gaap_MinimumMember_8652"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RangeMember_8651" xlink:to="Locator_us-gaap_MinimumMember_8652" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AcquiredFiniteLivedIntangibleAssetsLineItems" xlink:label="Locator_us-gaap_AcquiredFiniteLivedIntangibleAssetsLineItems_8495"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAcquiredAsPartOfBusinessCombinationTable" xlink:label="Locator_us-gaap_FiniteLivedIntangibleAssetsAcquiredAsPartOfBusinessCombinationTable_8496"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="Locator_us-gaap_AcquiredFiniteLivedIntangibleAssetsLineItems_8495" xlink:to="Locator_us-gaap_FiniteLivedIntangibleAssetsAcquiredAsPartOfBusinessCombinationTable_8496" order="0.5" xbrldt:contextElement="segment" xbrldt:closed="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAcquiredAsPartOfBusinessCombinationTable" xlink:label="Locator_us-gaap_FiniteLivedIntangibleAssetsAcquiredAsPartOfBusinessCombinationTable_8579"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AcquiredFiniteLivedIntangibleAssetsByMajorClassAxis" xlink:label="Locator_us-gaap_AcquiredFiniteLivedIntangibleAssetsByMajorClassAxis_8580"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_us-gaap_FiniteLivedIntangibleAssetsAcquiredAsPartOfBusinessCombinationTable_8579" xlink:to="Locator_us-gaap_AcquiredFiniteLivedIntangibleAssetsByMajorClassAxis_8580" order="0.0"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AcquiredFiniteLivedIntangibleAssetsByMajorClassAxis" xlink:label="Locator_us-gaap_AcquiredFiniteLivedIntangibleAssetsByMajorClassAxis_8223"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:label="Locator_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_8224"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="Locator_us-gaap_AcquiredFiniteLivedIntangibleAssetsByMajorClassAxis_8223" xlink:to="Locator_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_8224" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AcquiredFiniteLivedIntangibleAssetsByMajorClassAxis" xlink:label="Locator_us-gaap_AcquiredFiniteLivedIntangibleAssetsByMajorClassAxis_8595"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:label="Locator_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_8596"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_us-gaap_AcquiredFiniteLivedIntangibleAssetsByMajorClassAxis_8595" xlink:to="Locator_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_8596" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:label="Locator_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_8597"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CustomerRelationshipsMember" xlink:label="Locator_us-gaap_CustomerRelationshipsMember_8598"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_8597" xlink:to="Locator_us-gaap_CustomerRelationshipsMember_8598" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:label="Locator_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_8599"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_TradeNamesMember" xlink:label="Locator_us-gaap_TradeNamesMember_8600"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_8599" xlink:to="Locator_us-gaap_TradeNamesMember_8600" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:label="Locator_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_8601"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PowerSupplyContractsMember" xlink:label="Locator_exc_PowerSupplyContractsMember_8602"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_8601" xlink:to="Locator_exc_PowerSupplyContractsMember_8602" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAcquiredAsPartOfBusinessCombinationTable" xlink:label="Locator_us-gaap_FiniteLivedIntangibleAssetsAcquiredAsPartOfBusinessCombinationTable_8581"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BusinessAcquisitionIntangibleAssetsAxis" xlink:label="Locator_exc_BusinessAcquisitionIntangibleAssetsAxis_8582"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_us-gaap_FiniteLivedIntangibleAssetsAcquiredAsPartOfBusinessCombinationTable_8581" xlink:to="Locator_exc_BusinessAcquisitionIntangibleAssetsAxis_8582" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BusinessAcquisitionIntangibleAssetsAxis" xlink:label="Locator_exc_BusinessAcquisitionIntangibleAssetsAxis_8225"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BusinessAcquisitionIntangibleAssetsAcquireeDomain" xlink:label="Locator_exc_BusinessAcquisitionIntangibleAssetsAcquireeDomain_8226"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="Locator_exc_BusinessAcquisitionIntangibleAssetsAxis_8225" xlink:to="Locator_exc_BusinessAcquisitionIntangibleAssetsAcquireeDomain_8226" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BusinessAcquisitionIntangibleAssetsAxis" xlink:label="Locator_exc_BusinessAcquisitionIntangibleAssetsAxis_8603"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BusinessAcquisitionIntangibleAssetsAcquireeDomain" xlink:label="Locator_exc_BusinessAcquisitionIntangibleAssetsAcquireeDomain_8604"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_exc_BusinessAcquisitionIntangibleAssetsAxis_8603" xlink:to="Locator_exc_BusinessAcquisitionIntangibleAssetsAcquireeDomain_8604" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BusinessAcquisitionIntangibleAssetsAcquireeDomain" xlink:label="Locator_exc_BusinessAcquisitionIntangibleAssetsAcquireeDomain_8605"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ConstellationEnergyGroupAcquisitionMember" xlink:label="Locator_exc_ConstellationEnergyGroupAcquisitionMember_8606"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_BusinessAcquisitionIntangibleAssetsAcquireeDomain_8605" xlink:to="Locator_exc_ConstellationEnergyGroupAcquisitionMember_8606" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAcquiredAsPartOfBusinessCombinationTable" xlink:label="Locator_us-gaap_FiniteLivedIntangibleAssetsAcquiredAsPartOfBusinessCombinationTable_8583"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BalanceSheetLocationAxis" xlink:label="Locator_exc_BalanceSheetLocationAxis_8584"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_us-gaap_FiniteLivedIntangibleAssetsAcquiredAsPartOfBusinessCombinationTable_8583" xlink:to="Locator_exc_BalanceSheetLocationAxis_8584" order="2.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BalanceSheetLocationAxis" xlink:label="Locator_exc_BalanceSheetLocationAxis_8227"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BalanceSheetLocationIntangibleAssetsDomain" xlink:label="Locator_exc_BalanceSheetLocationIntangibleAssetsDomain_8228"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="Locator_exc_BalanceSheetLocationAxis_8227" xlink:to="Locator_exc_BalanceSheetLocationIntangibleAssetsDomain_8228" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BalanceSheetLocationAxis" xlink:label="Locator_exc_BalanceSheetLocationAxis_8607"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BalanceSheetLocationIntangibleAssetsDomain" xlink:label="Locator_exc_BalanceSheetLocationIntangibleAssetsDomain_8608"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_exc_BalanceSheetLocationAxis_8607" xlink:to="Locator_exc_BalanceSheetLocationIntangibleAssetsDomain_8608" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BalanceSheetLocationIntangibleAssetsDomain" xlink:label="Locator_exc_BalanceSheetLocationIntangibleAssetsDomain_8609"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OtherCurrentAssetsMember" xlink:label="Locator_exc_OtherCurrentAssetsMember_8610"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_BalanceSheetLocationIntangibleAssetsDomain_8609" xlink:to="Locator_exc_OtherCurrentAssetsMember_8610" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BalanceSheetLocationIntangibleAssetsDomain" xlink:label="Locator_exc_BalanceSheetLocationIntangibleAssetsDomain_8611"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OtherNoncurrentAssetsMember" xlink:label="Locator_exc_OtherNoncurrentAssetsMember_8612"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_BalanceSheetLocationIntangibleAssetsDomain_8611" xlink:to="Locator_exc_OtherNoncurrentAssetsMember_8612" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BalanceSheetLocationIntangibleAssetsDomain" xlink:label="Locator_exc_BalanceSheetLocationIntangibleAssetsDomain_8613"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_TotalAssetsMember" xlink:label="Locator_exc_TotalAssetsMember_8614"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_BalanceSheetLocationIntangibleAssetsDomain_8613" xlink:to="Locator_exc_TotalAssetsMember_8614" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BalanceSheetLocationIntangibleAssetsDomain" xlink:label="Locator_exc_BalanceSheetLocationIntangibleAssetsDomain_8615"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OtherCurrentLiabilitiesMember" xlink:label="Locator_exc_OtherCurrentLiabilitiesMember_8616"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_BalanceSheetLocationIntangibleAssetsDomain_8615" xlink:to="Locator_exc_OtherCurrentLiabilitiesMember_8616" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BalanceSheetLocationIntangibleAssetsDomain" xlink:label="Locator_exc_BalanceSheetLocationIntangibleAssetsDomain_8617"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OtherNoncurrentLiabilitiesMember" xlink:label="Locator_exc_OtherNoncurrentLiabilitiesMember_8618"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_BalanceSheetLocationIntangibleAssetsDomain_8617" xlink:to="Locator_exc_OtherNoncurrentLiabilitiesMember_8618" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BalanceSheetLocationIntangibleAssetsDomain" xlink:label="Locator_exc_BalanceSheetLocationIntangibleAssetsDomain_8619"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_TotalLiabilitiesMember" xlink:label="Locator_exc_TotalLiabilitiesMember_8620"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_BalanceSheetLocationIntangibleAssetsDomain_8619" xlink:to="Locator_exc_TotalLiabilitiesMember_8620" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AcquiredFiniteLivedIntangibleAssetsLineItems" xlink:label="Locator_us-gaap_AcquiredFiniteLivedIntangibleAssetsLineItems_8903"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AcquiredFiniteLivedIntangibleAssetAmount" xlink:label="Locator_us-gaap_AcquiredFiniteLivedIntangibleAssetAmount_8904"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_AcquiredFiniteLivedIntangibleAssetsLineItems_8903" xlink:to="Locator_us-gaap_AcquiredFiniteLivedIntangibleAssetAmount_8904" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AcquiredFiniteLivedIntangibleAssetsLineItems" xlink:label="Locator_us-gaap_AcquiredFiniteLivedIntangibleAssetsLineItems_8905"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AcquiredFiniteLivedIntangibleAssetWeightedAverageUsefulLife" xlink:label="Locator_us-gaap_AcquiredFiniteLivedIntangibleAssetWeightedAverageUsefulLife_8906"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_AcquiredFiniteLivedIntangibleAssetsLineItems_8905" xlink:to="Locator_us-gaap_AcquiredFiniteLivedIntangibleAssetWeightedAverageUsefulLife_8906" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AcquiredFiniteLivedIntangibleAssetsLineItems" xlink:label="Locator_us-gaap_AcquiredFiniteLivedIntangibleAssetsLineItems_8907"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsNetAbstract" xlink:label="Locator_us-gaap_FiniteLivedIntangibleAssetsNetAbstract_8908"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_AcquiredFiniteLivedIntangibleAssetsLineItems_8907" xlink:to="Locator_us-gaap_FiniteLivedIntangibleAssetsNetAbstract_8908" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsNetAbstract" xlink:label="Locator_us-gaap_FiniteLivedIntangibleAssetsNetAbstract_8909"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsGross" xlink:label="Locator_us-gaap_FiniteLivedIntangibleAssetsGross_8910"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_FiniteLivedIntangibleAssetsNetAbstract_8909" xlink:to="Locator_us-gaap_FiniteLivedIntangibleAssetsGross_8910" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsNetAbstract" xlink:label="Locator_us-gaap_FiniteLivedIntangibleAssetsNetAbstract_8911"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization" xlink:label="Locator_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_8912"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_FiniteLivedIntangibleAssetsNetAbstract_8911" xlink:to="Locator_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_8912" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsNetAbstract" xlink:label="Locator_us-gaap_FiniteLivedIntangibleAssetsNetAbstract_8913"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsNet" xlink:label="Locator_us-gaap_FiniteLivedIntangibleAssetsNet_8914"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_FiniteLivedIntangibleAssetsNetAbstract_8913" xlink:to="Locator_us-gaap_FiniteLivedIntangibleAssetsNet_8914" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AcquiredFiniteLivedIntangibleAssetsLineItems" xlink:label="Locator_us-gaap_AcquiredFiniteLivedIntangibleAssetsLineItems_8915"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract" xlink:label="Locator_us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract_8916"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_AcquiredFiniteLivedIntangibleAssetsLineItems_8915" xlink:to="Locator_us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract_8916" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract" xlink:label="Locator_us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract_8917"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FutureAmortizationExpenseYearOne" xlink:label="Locator_us-gaap_FutureAmortizationExpenseYearOne_8918"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract_8917" xlink:to="Locator_us-gaap_FutureAmortizationExpenseYearOne_8918" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract" xlink:label="Locator_us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract_8919"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FutureAmortizationExpenseYearTwo" xlink:label="Locator_us-gaap_FutureAmortizationExpenseYearTwo_8920"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract_8919" xlink:to="Locator_us-gaap_FutureAmortizationExpenseYearTwo_8920" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract" xlink:label="Locator_us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract_8921"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FutureAmortizationExpenseYearThree" xlink:label="Locator_us-gaap_FutureAmortizationExpenseYearThree_8922"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract_8921" xlink:to="Locator_us-gaap_FutureAmortizationExpenseYearThree_8922" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract" xlink:label="Locator_us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract_8923"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FutureAmortizationExpenseYearFour" xlink:label="Locator_us-gaap_FutureAmortizationExpenseYearFour_8924"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract_8923" xlink:to="Locator_us-gaap_FutureAmortizationExpenseYearFour_8924" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract" xlink:label="Locator_us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract_8925"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FutureAmortizationExpenseYearFive" xlink:label="Locator_us-gaap_FutureAmortizationExpenseYearFive_8926"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract_8925" xlink:to="Locator_us-gaap_FutureAmortizationExpenseYearFive_8926" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableLineItems" xlink:label="Locator_us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableLineItems_8371"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionEquityInterestIssuedOrIssuableTable" xlink:label="Locator_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionEquityInterestIssuedOrIssuableTable_8372"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="Locator_us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableLineItems_8371" xlink:to="Locator_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionEquityInterestIssuedOrIssuableTable_8372" order="0.5" xbrldt:contextElement="segment" xbrldt:closed="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionEquityInterestIssuedOrIssuableTable" xlink:label="Locator_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionEquityInterestIssuedOrIssuableTable_8569"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BusinessAcquisitionEquityInterestAxis" xlink:label="Locator_exc_BusinessAcquisitionEquityInterestAxis_8570"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionEquityInterestIssuedOrIssuableTable_8569" xlink:to="Locator_exc_BusinessAcquisitionEquityInterestAxis_8570" order="0.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BusinessAcquisitionEquityInterestAxis" xlink:label="Locator_exc_BusinessAcquisitionEquityInterestAxis_8229"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BusinessAcquisitionEquityInterestAcquireeDomain" xlink:label="Locator_exc_BusinessAcquisitionEquityInterestAcquireeDomain_8230"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="Locator_exc_BusinessAcquisitionEquityInterestAxis_8229" xlink:to="Locator_exc_BusinessAcquisitionEquityInterestAcquireeDomain_8230" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BusinessAcquisitionEquityInterestAxis" xlink:label="Locator_exc_BusinessAcquisitionEquityInterestAxis_8621"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BusinessAcquisitionEquityInterestAcquireeDomain" xlink:label="Locator_exc_BusinessAcquisitionEquityInterestAcquireeDomain_8622"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_exc_BusinessAcquisitionEquityInterestAxis_8621" xlink:to="Locator_exc_BusinessAcquisitionEquityInterestAcquireeDomain_8622" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BusinessAcquisitionEquityInterestAcquireeDomain" xlink:label="Locator_exc_BusinessAcquisitionEquityInterestAcquireeDomain_8623"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ConstellationEnergyGroupAcquisitionMember" xlink:label="Locator_exc_ConstellationEnergyGroupAcquisitionMember_8624"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_BusinessAcquisitionEquityInterestAcquireeDomain_8623" xlink:to="Locator_exc_ConstellationEnergyGroupAcquisitionMember_8624" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionEquityInterestIssuedOrIssuableTable" xlink:label="Locator_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionEquityInterestIssuedOrIssuableTable_8571"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_EquityInterestIssuedOrIssuableByTypeAxis" xlink:label="Locator_us-gaap_EquityInterestIssuedOrIssuableByTypeAxis_8572"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionEquityInterestIssuedOrIssuableTable_8571" xlink:to="Locator_us-gaap_EquityInterestIssuedOrIssuableByTypeAxis_8572" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_EquityInterestIssuedOrIssuableByTypeAxis" xlink:label="Locator_us-gaap_EquityInterestIssuedOrIssuableByTypeAxis_8231"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_EquityInterestIssuedOrIssuableTypeDomain" xlink:label="Locator_us-gaap_EquityInterestIssuedOrIssuableTypeDomain_8232"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="Locator_us-gaap_EquityInterestIssuedOrIssuableByTypeAxis_8231" xlink:to="Locator_us-gaap_EquityInterestIssuedOrIssuableTypeDomain_8232" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_EquityInterestIssuedOrIssuableByTypeAxis" xlink:label="Locator_us-gaap_EquityInterestIssuedOrIssuableByTypeAxis_8625"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_EquityInterestIssuedOrIssuableTypeDomain" xlink:label="Locator_us-gaap_EquityInterestIssuedOrIssuableTypeDomain_8626"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_us-gaap_EquityInterestIssuedOrIssuableByTypeAxis_8625" xlink:to="Locator_us-gaap_EquityInterestIssuedOrIssuableTypeDomain_8626" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_EquityInterestIssuedOrIssuableTypeDomain" xlink:label="Locator_us-gaap_EquityInterestIssuedOrIssuableTypeDomain_8627"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CommonStockMember" xlink:label="Locator_us-gaap_CommonStockMember_8628"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_EquityInterestIssuedOrIssuableTypeDomain_8627" xlink:to="Locator_us-gaap_CommonStockMember_8628" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_EquityInterestIssuedOrIssuableTypeDomain" xlink:label="Locator_us-gaap_EquityInterestIssuedOrIssuableTypeDomain_8629"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EquityAwardsMember" xlink:label="Locator_exc_EquityAwardsMember_8630"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_EquityInterestIssuedOrIssuableTypeDomain_8629" xlink:to="Locator_exc_EquityAwardsMember_8630" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableLineItems" xlink:label="Locator_us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableLineItems_8859"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessAcquisitionEquityInterestIssuedOrIssuableDescription" xlink:label="Locator_us-gaap_BusinessAcquisitionEquityInterestIssuedOrIssuableDescription_8860"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableLineItems_8859" xlink:to="Locator_us-gaap_BusinessAcquisitionEquityInterestIssuedOrIssuableDescription_8860" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableLineItems" xlink:label="Locator_us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableLineItems_8861"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessAcquisitionEquityInterestIssuedOrIssuableBasisForDeterminingValue" xlink:label="Locator_us-gaap_BusinessAcquisitionEquityInterestIssuedOrIssuableBasisForDeterminingValue_8862"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableLineItems_8861" xlink:to="Locator_us-gaap_BusinessAcquisitionEquityInterestIssuedOrIssuableBasisForDeterminingValue_8862" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableLineItems" xlink:label="Locator_us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableLineItems_8863"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued" xlink:label="Locator_us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued_8864"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableLineItems_8863" xlink:to="Locator_us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued_8864" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableLineItems" xlink:label="Locator_us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableLineItems_8865"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessAcquisitionEquityInterestIssuedOrIssuableValueAssigned" xlink:label="Locator_us-gaap_BusinessAcquisitionEquityInterestIssuedOrIssuableValueAssigned_8866"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableLineItems_8865" xlink:to="Locator_us-gaap_BusinessAcquisitionEquityInterestIssuedOrIssuableValueAssigned_8866" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableLineItems" xlink:label="Locator_us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableLineItems_8867"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BusinessAcquisitionEquityInterestIssuedOrIssuableExchangeRatio" xlink:label="Locator_exc_BusinessAcquisitionEquityInterestIssuedOrIssuableExchangeRatio_8868"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableLineItems_8867" xlink:to="Locator_exc_BusinessAcquisitionEquityInterestIssuedOrIssuableExchangeRatio_8868" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableLineItems" xlink:label="Locator_us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableLineItems_8869"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BusinessAcquisitionEquityInterestIssuedOrIssuableStockPrice" xlink:label="Locator_exc_BusinessAcquisitionEquityInterestIssuedOrIssuableStockPrice_8870"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableLineItems_8869" xlink:to="Locator_exc_BusinessAcquisitionEquityInterestIssuedOrIssuableStockPrice_8870" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableLineItems" xlink:label="Locator_us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableLineItems_8871"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BusinessAcquisitionEquityInterestIssuedOrIssuableStockWithheld" xlink:label="Locator_exc_BusinessAcquisitionEquityInterestIssuedOrIssuableStockWithheld_8872"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableLineItems_8871" xlink:to="Locator_exc_BusinessAcquisitionEquityInterestIssuedOrIssuableStockWithheld_8872" order="7.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessAcquisitionLineItems" xlink:label="Locator_us-gaap_BusinessAcquisitionLineItems_8685"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessAcquisitionEntityAcquiredAndReasonForAcquisitionAbstract" xlink:label="Locator_us-gaap_BusinessAcquisitionEntityAcquiredAndReasonForAcquisitionAbstract_8686"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_BusinessAcquisitionLineItems_8685" xlink:to="Locator_us-gaap_BusinessAcquisitionEntityAcquiredAndReasonForAcquisitionAbstract_8686" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessAcquisitionEntityAcquiredAndReasonForAcquisitionAbstract" xlink:label="Locator_us-gaap_BusinessAcquisitionEntityAcquiredAndReasonForAcquisitionAbstract_8687"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BusinessAcquisitionsMegawattsAcquired" xlink:label="Locator_exc_BusinessAcquisitionsMegawattsAcquired_8688"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_BusinessAcquisitionEntityAcquiredAndReasonForAcquisitionAbstract_8687" xlink:to="Locator_exc_BusinessAcquisitionsMegawattsAcquired_8688" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessAcquisitionEntityAcquiredAndReasonForAcquisitionAbstract" xlink:label="Locator_us-gaap_BusinessAcquisitionEntityAcquiredAndReasonForAcquisitionAbstract_8689"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BusinessAcquisitionsPercentageInterestOfAcquisition" xlink:label="Locator_exc_BusinessAcquisitionsPercentageInterestOfAcquisition_8690"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_BusinessAcquisitionEntityAcquiredAndReasonForAcquisitionAbstract_8689" xlink:to="Locator_exc_BusinessAcquisitionsPercentageInterestOfAcquisition_8690" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessAcquisitionEntityAcquiredAndReasonForAcquisitionAbstract" xlink:label="Locator_us-gaap_BusinessAcquisitionEntityAcquiredAndReasonForAcquisitionAbstract_8691"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessAcquisitionDescriptionOfAcquiredEntity" xlink:label="Locator_us-gaap_BusinessAcquisitionDescriptionOfAcquiredEntity_8692"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_BusinessAcquisitionEntityAcquiredAndReasonForAcquisitionAbstract_8691" xlink:to="Locator_us-gaap_BusinessAcquisitionDescriptionOfAcquiredEntity_8692" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessAcquisitionEntityAcquiredAndReasonForAcquisitionAbstract" xlink:label="Locator_us-gaap_BusinessAcquisitionEntityAcquiredAndReasonForAcquisitionAbstract_8693"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessCombinationReasonForBusinessCombination" xlink:label="Locator_us-gaap_BusinessCombinationReasonForBusinessCombination_8694"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_BusinessAcquisitionEntityAcquiredAndReasonForAcquisitionAbstract_8693" xlink:to="Locator_us-gaap_BusinessCombinationReasonForBusinessCombination_8694" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessAcquisitionEntityAcquiredAndReasonForAcquisitionAbstract" xlink:label="Locator_us-gaap_BusinessAcquisitionEntityAcquiredAndReasonForAcquisitionAbstract_8695"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BusinessAcquisitionsAcreageOfAcquisition" xlink:label="Locator_exc_BusinessAcquisitionsAcreageOfAcquisition_8696"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_BusinessAcquisitionEntityAcquiredAndReasonForAcquisitionAbstract_8695" xlink:to="Locator_exc_BusinessAcquisitionsAcreageOfAcquisition_8696" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessAcquisitionLineItems" xlink:label="Locator_us-gaap_BusinessAcquisitionLineItems_8697"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessAcquisitionDateOfAcquisitionAbstract" xlink:label="Locator_us-gaap_BusinessAcquisitionDateOfAcquisitionAbstract_8698"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_BusinessAcquisitionLineItems_8697" xlink:to="Locator_us-gaap_BusinessAcquisitionDateOfAcquisitionAbstract_8698" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessAcquisitionDateOfAcquisitionAbstract" xlink:label="Locator_us-gaap_BusinessAcquisitionDateOfAcquisitionAbstract_8699"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessAcquisitionDateOfAcquisitionAgreement" xlink:label="Locator_us-gaap_BusinessAcquisitionDateOfAcquisitionAgreement_8700"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_BusinessAcquisitionDateOfAcquisitionAbstract_8699" xlink:to="Locator_us-gaap_BusinessAcquisitionDateOfAcquisitionAgreement_8700" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessAcquisitionDateOfAcquisitionAbstract" xlink:label="Locator_us-gaap_BusinessAcquisitionDateOfAcquisitionAbstract_8701"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessAcquisitionEffectiveDateOfAcquisition" xlink:label="Locator_us-gaap_BusinessAcquisitionEffectiveDateOfAcquisition_8702"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_BusinessAcquisitionDateOfAcquisitionAbstract_8701" xlink:to="Locator_us-gaap_BusinessAcquisitionEffectiveDateOfAcquisition_8702" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessAcquisitionLineItems" xlink:label="Locator_us-gaap_BusinessAcquisitionLineItems_8703"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessAcquisitionCostOfAcquiredEntityAbstract" xlink:label="Locator_us-gaap_BusinessAcquisitionCostOfAcquiredEntityAbstract_8704"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_BusinessAcquisitionLineItems_8703" xlink:to="Locator_us-gaap_BusinessAcquisitionCostOfAcquiredEntityAbstract_8704" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessAcquisitionCostOfAcquiredEntityAbstract" xlink:label="Locator_us-gaap_BusinessAcquisitionCostOfAcquiredEntityAbstract_8705"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessCombinationIntegrationRelatedCosts" xlink:label="Locator_us-gaap_BusinessCombinationIntegrationRelatedCosts_8706"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_BusinessAcquisitionCostOfAcquiredEntityAbstract_8705" xlink:to="Locator_us-gaap_BusinessCombinationIntegrationRelatedCosts_8706" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessAcquisitionCostOfAcquiredEntityAbstract" xlink:label="Locator_us-gaap_BusinessAcquisitionCostOfAcquiredEntityAbstract_8707"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessAcquisitionCostOfAcquiredEntityTransactionCosts" xlink:label="Locator_us-gaap_BusinessAcquisitionCostOfAcquiredEntityTransactionCosts_8708"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_BusinessAcquisitionCostOfAcquiredEntityAbstract_8707" xlink:to="Locator_us-gaap_BusinessAcquisitionCostOfAcquiredEntityTransactionCosts_8708" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessAcquisitionCostOfAcquiredEntityAbstract" xlink:label="Locator_us-gaap_BusinessAcquisitionCostOfAcquiredEntityAbstract_8709"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessAcquisitionCostOfAcquiredEntityPurchasePriceAbstract" xlink:label="Locator_us-gaap_BusinessAcquisitionCostOfAcquiredEntityPurchasePriceAbstract_8710"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_BusinessAcquisitionCostOfAcquiredEntityAbstract_8709" xlink:to="Locator_us-gaap_BusinessAcquisitionCostOfAcquiredEntityPurchasePriceAbstract_8710" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessAcquisitionCostOfAcquiredEntityPurchasePriceAbstract" xlink:label="Locator_us-gaap_BusinessAcquisitionCostOfAcquiredEntityPurchasePriceAbstract_8711"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessAcquisitionCostOfAcquiredEntityCashPaid" xlink:label="Locator_us-gaap_BusinessAcquisitionCostOfAcquiredEntityCashPaid_8712"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_BusinessAcquisitionCostOfAcquiredEntityPurchasePriceAbstract_8711" xlink:to="Locator_us-gaap_BusinessAcquisitionCostOfAcquiredEntityCashPaid_8712" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessAcquisitionCostOfAcquiredEntityPurchasePriceAbstract" xlink:label="Locator_us-gaap_BusinessAcquisitionCostOfAcquiredEntityPurchasePriceAbstract_8713"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessAcquisitionPreexistingRelationshipGainLossRecognized" xlink:label="Locator_us-gaap_BusinessAcquisitionPreexistingRelationshipGainLossRecognized_8714"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_BusinessAcquisitionCostOfAcquiredEntityPurchasePriceAbstract_8713" xlink:to="Locator_us-gaap_BusinessAcquisitionPreexistingRelationshipGainLossRecognized_8714" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessAcquisitionPreexistingRelationshipGainLossRecognized" xlink:label="Locator_us-gaap_BusinessAcquisitionPreexistingRelationshipGainLossRecognized_8715"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessAcquisitionPreexistingRelationshipDescription" xlink:label="Locator_us-gaap_BusinessAcquisitionPreexistingRelationshipDescription_8716"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_BusinessAcquisitionPreexistingRelationshipGainLossRecognized_8715" xlink:to="Locator_us-gaap_BusinessAcquisitionPreexistingRelationshipDescription_8716" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessAcquisitionCostOfAcquiredEntityPurchasePriceAbstract" xlink:label="Locator_us-gaap_BusinessAcquisitionCostOfAcquiredEntityPurchasePriceAbstract_8717"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessAcquisitionContingentConsiderationAtFairValue" xlink:label="Locator_us-gaap_BusinessAcquisitionContingentConsiderationAtFairValue_8718"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_BusinessAcquisitionCostOfAcquiredEntityPurchasePriceAbstract_8717" xlink:to="Locator_us-gaap_BusinessAcquisitionContingentConsiderationAtFairValue_8718" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessAcquisitionContingentConsiderationAtFairValue" xlink:label="Locator_us-gaap_BusinessAcquisitionContingentConsiderationAtFairValue_8719"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_EscrowDeposit" xlink:label="Locator_us-gaap_EscrowDeposit_8720"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_BusinessAcquisitionContingentConsiderationAtFairValue_8719" xlink:to="Locator_us-gaap_EscrowDeposit_8720" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessAcquisitionCostOfAcquiredEntityPurchasePriceAbstract" xlink:label="Locator_us-gaap_BusinessAcquisitionCostOfAcquiredEntityPurchasePriceAbstract_8721"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessCombinationConsiderationTransferred" xlink:label="Locator_us-gaap_BusinessCombinationConsiderationTransferred_8722"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_BusinessAcquisitionCostOfAcquiredEntityPurchasePriceAbstract_8721" xlink:to="Locator_us-gaap_BusinessCombinationConsiderationTransferred_8722" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessAcquisitionLineItems" xlink:label="Locator_us-gaap_BusinessAcquisitionLineItems_8723"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNetAbstract" xlink:label="Locator_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNetAbstract_8724"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_BusinessAcquisitionLineItems_8723" xlink:to="Locator_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNetAbstract_8724" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNetAbstract" xlink:label="Locator_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNetAbstract_8725"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment" xlink:label="Locator_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment_8726"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNetAbstract_8725" xlink:to="Locator_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment_8726" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNetAbstract" xlink:label="Locator_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNetAbstract_8727"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory" xlink:label="Locator_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory_8728"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNetAbstract_8727" xlink:to="Locator_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory_8728" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNetAbstract" xlink:label="Locator_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNetAbstract_8729"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles" xlink:label="Locator_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles_8730"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNetAbstract_8729" xlink:to="Locator_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles_8730" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNetAbstract" xlink:label="Locator_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNetAbstract_8731"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedFinancialLiabilities" xlink:label="Locator_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedFinancialLiabilities_8732"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNetAbstract_8731" xlink:to="Locator_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedFinancialLiabilities_8732" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNetAbstract" xlink:label="Locator_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNetAbstract_8733"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedWorkingCapital" xlink:label="Locator_exc_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedWorkingCapital_8734"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNetAbstract_8733" xlink:to="Locator_exc_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedWorkingCapital_8734" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNetAbstract" xlink:label="Locator_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNetAbstract_8735"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherAssetsAndLiabilities" xlink:label="Locator_exc_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherAssetsAndLiabilities_8736"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNetAbstract_8735" xlink:to="Locator_exc_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherAssetsAndLiabilities_8736" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNetAbstract" xlink:label="Locator_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNetAbstract_8737"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet" xlink:label="Locator_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet_8738"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNetAbstract_8737" xlink:to="Locator_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet_8738" order="7.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessAcquisitionLineItems" xlink:label="Locator_us-gaap_BusinessAcquisitionLineItems_8739"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessCombinationBargainPurchaseAbstract" xlink:label="Locator_us-gaap_BusinessCombinationBargainPurchaseAbstract_8740"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_BusinessAcquisitionLineItems_8739" xlink:to="Locator_us-gaap_BusinessCombinationBargainPurchaseAbstract_8740" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessCombinationBargainPurchaseAbstract" xlink:label="Locator_us-gaap_BusinessCombinationBargainPurchaseAbstract_8741"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessCombinationBargainPurchaseGainRecognizedAmount" xlink:label="Locator_us-gaap_BusinessCombinationBargainPurchaseGainRecognizedAmount_8742"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_BusinessCombinationBargainPurchaseAbstract_8741" xlink:to="Locator_us-gaap_BusinessCombinationBargainPurchaseGainRecognizedAmount_8742" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessAcquisitionLineItems" xlink:label="Locator_us-gaap_BusinessAcquisitionLineItems_8743"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessAcquisitionPurchasePriceAllocationAbstract" xlink:label="Locator_us-gaap_BusinessAcquisitionPurchasePriceAllocationAbstract_8744"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_BusinessAcquisitionLineItems_8743" xlink:to="Locator_us-gaap_BusinessAcquisitionPurchasePriceAllocationAbstract_8744" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessAcquisitionPurchasePriceAllocationAbstract" xlink:label="Locator_us-gaap_BusinessAcquisitionPurchasePriceAllocationAbstract_8745"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessAcquisitionPurchasePriceAllocationMethodology" xlink:label="Locator_us-gaap_BusinessAcquisitionPurchasePriceAllocationMethodology_8746"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_BusinessAcquisitionPurchasePriceAllocationAbstract_8745" xlink:to="Locator_us-gaap_BusinessAcquisitionPurchasePriceAllocationMethodology_8746" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessAcquisitionPurchasePriceAllocationAbstract" xlink:label="Locator_us-gaap_BusinessAcquisitionPurchasePriceAllocationAbstract_8747"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessAcquisitionPurchasePriceAllocationStatus" xlink:label="Locator_us-gaap_BusinessAcquisitionPurchasePriceAllocationStatus_8748"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_BusinessAcquisitionPurchasePriceAllocationAbstract_8747" xlink:to="Locator_us-gaap_BusinessAcquisitionPurchasePriceAllocationStatus_8748" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessAcquisitionPurchasePriceAllocationAbstract" xlink:label="Locator_us-gaap_BusinessAcquisitionPurchasePriceAllocationAbstract_8749"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessAcquisitionPurchasePriceAllocationCurrentAssets" xlink:label="Locator_us-gaap_BusinessAcquisitionPurchasePriceAllocationCurrentAssets_8750"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_BusinessAcquisitionPurchasePriceAllocationAbstract_8749" xlink:to="Locator_us-gaap_BusinessAcquisitionPurchasePriceAllocationCurrentAssets_8750" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessAcquisitionPurchasePriceAllocationAbstract" xlink:label="Locator_us-gaap_BusinessAcquisitionPurchasePriceAllocationAbstract_8751"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessAcquisitionPurchasePriceAllocationPropertyPlantAndEquipment" xlink:label="Locator_us-gaap_BusinessAcquisitionPurchasePriceAllocationPropertyPlantAndEquipment_8752"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_BusinessAcquisitionPurchasePriceAllocationAbstract_8751" xlink:to="Locator_us-gaap_BusinessAcquisitionPurchasePriceAllocationPropertyPlantAndEquipment_8752" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessAcquisitionPurchasePriceAllocationAbstract" xlink:label="Locator_us-gaap_BusinessAcquisitionPurchasePriceAllocationAbstract_8753"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BusinessAcquisitionPurchasePriceAllocationIntangibleAssetsContracts" xlink:label="Locator_exc_BusinessAcquisitionPurchasePriceAllocationIntangibleAssetsContracts_8754"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_BusinessAcquisitionPurchasePriceAllocationAbstract_8753" xlink:to="Locator_exc_BusinessAcquisitionPurchasePriceAllocationIntangibleAssetsContracts_8754" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessAcquisitionPurchasePriceAllocationAbstract" xlink:label="Locator_us-gaap_BusinessAcquisitionPurchasePriceAllocationAbstract_8755"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BusinessAcquisitionPurchasePriceAllocationIntangibleAssetsRelationships" xlink:label="Locator_exc_BusinessAcquisitionPurchasePriceAllocationIntangibleAssetsRelationships_8756"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_BusinessAcquisitionPurchasePriceAllocationAbstract_8755" xlink:to="Locator_exc_BusinessAcquisitionPurchasePriceAllocationIntangibleAssetsRelationships_8756" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessAcquisitionPurchasePriceAllocationAbstract" xlink:label="Locator_us-gaap_BusinessAcquisitionPurchasePriceAllocationAbstract_8757"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BusinessAcquisitionPurchasePriceAllocationCengInvestment" xlink:label="Locator_exc_BusinessAcquisitionPurchasePriceAllocationCengInvestment_8758"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_BusinessAcquisitionPurchasePriceAllocationAbstract_8757" xlink:to="Locator_exc_BusinessAcquisitionPurchasePriceAllocationCengInvestment_8758" order="7.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessAcquisitionPurchasePriceAllocationAbstract" xlink:label="Locator_us-gaap_BusinessAcquisitionPurchasePriceAllocationAbstract_8759"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BusinessAcquisitionPurchasePriceAllocationPensionRegulatoryAsset" xlink:label="Locator_exc_BusinessAcquisitionPurchasePriceAllocationPensionRegulatoryAsset_8760"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_BusinessAcquisitionPurchasePriceAllocationAbstract_8759" xlink:to="Locator_exc_BusinessAcquisitionPurchasePriceAllocationPensionRegulatoryAsset_8760" order="8.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessAcquisitionPurchasePriceAllocationAbstract" xlink:label="Locator_us-gaap_BusinessAcquisitionPurchasePriceAllocationAbstract_8761"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessAcquisitionPurchasePriceAllocationOtherNoncurrentAssets" xlink:label="Locator_us-gaap_BusinessAcquisitionPurchasePriceAllocationOtherNoncurrentAssets_8762"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_BusinessAcquisitionPurchasePriceAllocationAbstract_8761" xlink:to="Locator_us-gaap_BusinessAcquisitionPurchasePriceAllocationOtherNoncurrentAssets_8762" order="9.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessAcquisitionPurchasePriceAllocationAbstract" xlink:label="Locator_us-gaap_BusinessAcquisitionPurchasePriceAllocationAbstract_8763"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessAcquisitionPurchasePriceAllocationAssetsAcquired" xlink:label="Locator_us-gaap_BusinessAcquisitionPurchasePriceAllocationAssetsAcquired_8764"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_BusinessAcquisitionPurchasePriceAllocationAbstract_8763" xlink:to="Locator_us-gaap_BusinessAcquisitionPurchasePriceAllocationAssetsAcquired_8764" order="10.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessAcquisitionPurchasePriceAllocationAbstract" xlink:label="Locator_us-gaap_BusinessAcquisitionPurchasePriceAllocationAbstract_8765"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessAcquisitionPurchasePriceAllocationCurrentLiabilities" xlink:label="Locator_us-gaap_BusinessAcquisitionPurchasePriceAllocationCurrentLiabilities_8766"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_BusinessAcquisitionPurchasePriceAllocationAbstract_8765" xlink:to="Locator_us-gaap_BusinessAcquisitionPurchasePriceAllocationCurrentLiabilities_8766" order="11.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessAcquisitionPurchasePriceAllocationAbstract" xlink:label="Locator_us-gaap_BusinessAcquisitionPurchasePriceAllocationAbstract_8767"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessAcquisitionPurchasePriceAllocationOtherNoncurrentLiabilities" xlink:label="Locator_us-gaap_BusinessAcquisitionPurchasePriceAllocationOtherNoncurrentLiabilities_8768"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_BusinessAcquisitionPurchasePriceAllocationAbstract_8767" xlink:to="Locator_us-gaap_BusinessAcquisitionPurchasePriceAllocationOtherNoncurrentLiabilities_8768" order="12.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessAcquisitionPurchasePriceAllocationAbstract" xlink:label="Locator_us-gaap_BusinessAcquisitionPurchasePriceAllocationAbstract_8769"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BusinessAcquisitionPurchasePriceAllocationLiabilityContracts" xlink:label="Locator_exc_BusinessAcquisitionPurchasePriceAllocationLiabilityContracts_8770"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_BusinessAcquisitionPurchasePriceAllocationAbstract_8769" xlink:to="Locator_exc_BusinessAcquisitionPurchasePriceAllocationLiabilityContracts_8770" order="13.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessAcquisitionPurchasePriceAllocationAbstract" xlink:label="Locator_us-gaap_BusinessAcquisitionPurchasePriceAllocationAbstract_8771"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessAcquisitionPurchasePriceAllocationNoncurrentLiabilitiesLongTermDebt" xlink:label="Locator_us-gaap_BusinessAcquisitionPurchasePriceAllocationNoncurrentLiabilitiesLongTermDebt_8772"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_BusinessAcquisitionPurchasePriceAllocationAbstract_8771" xlink:to="Locator_us-gaap_BusinessAcquisitionPurchasePriceAllocationNoncurrentLiabilitiesLongTermDebt_8772" order="14.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessAcquisitionPurchasePriceAllocationAbstract" xlink:label="Locator_us-gaap_BusinessAcquisitionPurchasePriceAllocationAbstract_8773"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessCombinationAcquisitionOfLessThan100PercentNoncontrollingInterestFairValue" xlink:label="Locator_us-gaap_BusinessCombinationAcquisitionOfLessThan100PercentNoncontrollingInterestFairValue_8774"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_BusinessAcquisitionPurchasePriceAllocationAbstract_8773" xlink:to="Locator_us-gaap_BusinessCombinationAcquisitionOfLessThan100PercentNoncontrollingInterestFairValue_8774" order="15.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessAcquisitionPurchasePriceAllocationAbstract" xlink:label="Locator_us-gaap_BusinessAcquisitionPurchasePriceAllocationAbstract_8775"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessAcquisitionPurchasePriceAllocationLiabilitiesAssumed" xlink:label="Locator_us-gaap_BusinessAcquisitionPurchasePriceAllocationLiabilitiesAssumed_8776"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_BusinessAcquisitionPurchasePriceAllocationAbstract_8775" xlink:to="Locator_us-gaap_BusinessAcquisitionPurchasePriceAllocationLiabilitiesAssumed_8776" order="16.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessAcquisitionPurchasePriceAllocationAbstract" xlink:label="Locator_us-gaap_BusinessAcquisitionPurchasePriceAllocationAbstract_8777"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessAcquisitionPurchasePriceAllocationAssetsAcquiredLiabilitiesAssumedNet" xlink:label="Locator_us-gaap_BusinessAcquisitionPurchasePriceAllocationAssetsAcquiredLiabilitiesAssumedNet_8778"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_BusinessAcquisitionPurchasePriceAllocationAbstract_8777" xlink:to="Locator_us-gaap_BusinessAcquisitionPurchasePriceAllocationAssetsAcquiredLiabilitiesAssumedNet_8778" order="17.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessAcquisitionPurchasePriceAllocationAbstract" xlink:label="Locator_us-gaap_BusinessAcquisitionPurchasePriceAllocationAbstract_8779"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessAcquisitionPurchasePriceAllocationGoodwillAmount" xlink:label="Locator_us-gaap_BusinessAcquisitionPurchasePriceAllocationGoodwillAmount_8780"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_BusinessAcquisitionPurchasePriceAllocationAbstract_8779" xlink:to="Locator_us-gaap_BusinessAcquisitionPurchasePriceAllocationGoodwillAmount_8780" order="18.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessAcquisitionLineItems" xlink:label="Locator_us-gaap_BusinessAcquisitionLineItems_8781"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BusinessAcquisitionImpactOfMergerAbstract" xlink:label="Locator_exc_BusinessAcquisitionImpactOfMergerAbstract_8782"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_BusinessAcquisitionLineItems_8781" xlink:to="Locator_exc_BusinessAcquisitionImpactOfMergerAbstract_8782" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BusinessAcquisitionImpactOfMergerAbstract" xlink:label="Locator_exc_BusinessAcquisitionImpactOfMergerAbstract_8783"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_Revenues" xlink:label="Locator_us-gaap_Revenues_8784"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_BusinessAcquisitionImpactOfMergerAbstract_8783" xlink:to="Locator_us-gaap_Revenues_8784" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BusinessAcquisitionImpactOfMergerAbstract" xlink:label="Locator_exc_BusinessAcquisitionImpactOfMergerAbstract_8785"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BusinessAcquisitionRevenuesIncludedInCombinedEntity" xlink:label="Locator_exc_BusinessAcquisitionRevenuesIncludedInCombinedEntity_8786"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_BusinessAcquisitionImpactOfMergerAbstract_8785" xlink:to="Locator_exc_BusinessAcquisitionRevenuesIncludedInCombinedEntity_8786" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BusinessAcquisitionImpactOfMergerAbstract" xlink:label="Locator_exc_BusinessAcquisitionImpactOfMergerAbstract_8787"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BusinessAcquisitionIncomeLossIncludedInCombinedEntity" xlink:label="Locator_exc_BusinessAcquisitionIncomeLossIncludedInCombinedEntity_8788"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_BusinessAcquisitionImpactOfMergerAbstract_8787" xlink:to="Locator_exc_BusinessAcquisitionIncomeLossIncludedInCombinedEntity_8788" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BusinessAcquisitionImpactOfMergerAbstract" xlink:label="Locator_exc_BusinessAcquisitionImpactOfMergerAbstract_8789"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="Locator_us-gaap_NetIncomeLoss_8790"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_BusinessAcquisitionImpactOfMergerAbstract_8789" xlink:to="Locator_us-gaap_NetIncomeLoss_8790" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessAcquisitionLineItems" xlink:label="Locator_us-gaap_BusinessAcquisitionLineItems_8791"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessAcquisitionProFormaInformationAbstract" xlink:label="Locator_us-gaap_BusinessAcquisitionProFormaInformationAbstract_8792"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_BusinessAcquisitionLineItems_8791" xlink:to="Locator_us-gaap_BusinessAcquisitionProFormaInformationAbstract_8792" order="7.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessAcquisitionProFormaInformationAbstract" xlink:label="Locator_us-gaap_BusinessAcquisitionProFormaInformationAbstract_8793"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessAcquisitionsProFormaRevenue" xlink:label="Locator_us-gaap_BusinessAcquisitionsProFormaRevenue_8794"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_BusinessAcquisitionProFormaInformationAbstract_8793" xlink:to="Locator_us-gaap_BusinessAcquisitionsProFormaRevenue_8794" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessAcquisitionProFormaInformationAbstract" xlink:label="Locator_us-gaap_BusinessAcquisitionProFormaInformationAbstract_8795"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss" xlink:label="Locator_us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss_8796"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_BusinessAcquisitionProFormaInformationAbstract_8795" xlink:to="Locator_us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss_8796" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessAcquisitionProFormaInformationAbstract" xlink:label="Locator_us-gaap_BusinessAcquisitionProFormaInformationAbstract_8797"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessAcquisitionProFormaEarningsPerShareBasic" xlink:label="Locator_us-gaap_BusinessAcquisitionProFormaEarningsPerShareBasic_8798"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_BusinessAcquisitionProFormaInformationAbstract_8797" xlink:to="Locator_us-gaap_BusinessAcquisitionProFormaEarningsPerShareBasic_8798" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessAcquisitionProFormaInformationAbstract" xlink:label="Locator_us-gaap_BusinessAcquisitionProFormaInformationAbstract_8799"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessAcquisitionProFormaEarningsPerShareDiluted" xlink:label="Locator_us-gaap_BusinessAcquisitionProFormaEarningsPerShareDiluted_8800"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_BusinessAcquisitionProFormaInformationAbstract_8799" xlink:to="Locator_us-gaap_BusinessAcquisitionProFormaEarningsPerShareDiluted_8800" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessAcquisitionProFormaInformationAbstract" xlink:label="Locator_us-gaap_BusinessAcquisitionProFormaInformationAbstract_8801"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BusinessAcquisitionProFormaNonrecurringCost" xlink:label="Locator_exc_BusinessAcquisitionProFormaNonrecurringCost_8802"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_BusinessAcquisitionProFormaInformationAbstract_8801" xlink:to="Locator_exc_BusinessAcquisitionProFormaNonrecurringCost_8802" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessAcquisitionProFormaInformationAbstract" xlink:label="Locator_us-gaap_BusinessAcquisitionProFormaInformationAbstract_8803"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BusinessAcquisitionProFormaIntegrationRelatedCost" xlink:label="Locator_exc_BusinessAcquisitionProFormaIntegrationRelatedCost_8804"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_BusinessAcquisitionProFormaInformationAbstract_8803" xlink:to="Locator_exc_BusinessAcquisitionProFormaIntegrationRelatedCost_8804" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessAcquisitionProFormaInformationAbstract" xlink:label="Locator_us-gaap_BusinessAcquisitionProFormaInformationAbstract_8805"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BusinessAcquisitionProFormaPreacquisitionSettlementCost" xlink:label="Locator_exc_BusinessAcquisitionProFormaPreacquisitionSettlementCost_8806"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_BusinessAcquisitionProFormaInformationAbstract_8805" xlink:to="Locator_exc_BusinessAcquisitionProFormaPreacquisitionSettlementCost_8806" order="7.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessAcquisitionLineItems" xlink:label="Locator_us-gaap_BusinessAcquisitionLineItems_8807"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BusinessAcquisitionRegulatoryMattersAbstract" xlink:label="Locator_exc_BusinessAcquisitionRegulatoryMattersAbstract_8808"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_BusinessAcquisitionLineItems_8807" xlink:to="Locator_exc_BusinessAcquisitionRegulatoryMattersAbstract_8808" order="8.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BusinessAcquisitionRegulatoryMattersAbstract" xlink:label="Locator_exc_BusinessAcquisitionRegulatoryMattersAbstract_8809"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BusinessAcquisitionDirectInvestmentWithStateAndLocalGovernmentsDueToSettlement" xlink:label="Locator_exc_BusinessAcquisitionDirectInvestmentWithStateAndLocalGovernmentsDueToSettlement_8810"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_BusinessAcquisitionRegulatoryMattersAbstract_8809" xlink:to="Locator_exc_BusinessAcquisitionDirectInvestmentWithStateAndLocalGovernmentsDueToSettlement_8810" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BusinessAcquisitionRegulatoryMattersAbstract" xlink:label="Locator_exc_BusinessAcquisitionRegulatoryMattersAbstract_8811"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BusinessAcquisitionCostsRecognizedPostMergerAbstract" xlink:label="Locator_exc_BusinessAcquisitionCostsRecognizedPostMergerAbstract_8812"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_BusinessAcquisitionRegulatoryMattersAbstract_8811" xlink:to="Locator_exc_BusinessAcquisitionCostsRecognizedPostMergerAbstract_8812" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BusinessAcquisitionCostsRecognizedPostMergerAbstract" xlink:label="Locator_exc_BusinessAcquisitionCostsRecognizedPostMergerAbstract_8813"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BusinessAcquisitionRegulatoryRateCreditPerCustomer" xlink:label="Locator_exc_BusinessAcquisitionRegulatoryRateCreditPerCustomer_8814"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_BusinessAcquisitionCostsRecognizedPostMergerAbstract_8813" xlink:to="Locator_exc_BusinessAcquisitionRegulatoryRateCreditPerCustomer_8814" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BusinessAcquisitionCostsRecognizedPostMergerAbstract" xlink:label="Locator_exc_BusinessAcquisitionCostsRecognizedPostMergerAbstract_8815"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BusinessAcquisitionRegulatoryRateCredit" xlink:label="Locator_exc_BusinessAcquisitionRegulatoryRateCredit_8816"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_BusinessAcquisitionCostsRecognizedPostMergerAbstract_8815" xlink:to="Locator_exc_BusinessAcquisitionRegulatoryRateCredit_8816" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BusinessAcquisitionCostsRecognizedPostMergerAbstract" xlink:label="Locator_exc_BusinessAcquisitionCostsRecognizedPostMergerAbstract_8817"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BusinessAcquisitionCustomerInvestmentFundToInvestInEnergyEfficiencyAndLowIncomeEnergyAssistanceToCustomers" xlink:label="Locator_exc_BusinessAcquisitionCustomerInvestmentFundToInvestInEnergyEfficiencyAndLowIncomeEnergyAssistanceToCustomers_8818"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_BusinessAcquisitionCostsRecognizedPostMergerAbstract_8817" xlink:to="Locator_exc_BusinessAcquisitionCustomerInvestmentFundToInvestInEnergyEfficiencyAndLowIncomeEnergyAssistanceToCustomers_8818" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BusinessAcquisitionCostsRecognizedPostMergerAbstract" xlink:label="Locator_exc_BusinessAcquisitionCostsRecognizedPostMergerAbstract_8819"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BusinessAcquisitionsContributionForRenewableEnergyOrEnergyEfficiency" xlink:label="Locator_exc_BusinessAcquisitionsContributionForRenewableEnergyOrEnergyEfficiency_8820"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_BusinessAcquisitionCostsRecognizedPostMergerAbstract_8819" xlink:to="Locator_exc_BusinessAcquisitionsContributionForRenewableEnergyOrEnergyEfficiency_8820" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BusinessAcquisitionCostsRecognizedPostMergerAbstract" xlink:label="Locator_exc_BusinessAcquisitionCostsRecognizedPostMergerAbstract_8821"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BusinessAcquisitionsCharitableContributions" xlink:label="Locator_exc_BusinessAcquisitionsCharitableContributions_8822"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_BusinessAcquisitionCostsRecognizedPostMergerAbstract_8821" xlink:to="Locator_exc_BusinessAcquisitionsCharitableContributions_8822" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BusinessAcquisitionCostsRecognizedPostMergerAbstract" xlink:label="Locator_exc_BusinessAcquisitionCostsRecognizedPostMergerAbstract_8823"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BusinessAcquisitionsGovernmentFundingForEnergyDevelopment" xlink:label="Locator_exc_BusinessAcquisitionsGovernmentFundingForEnergyDevelopment_8824"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_BusinessAcquisitionCostsRecognizedPostMergerAbstract_8823" xlink:to="Locator_exc_BusinessAcquisitionsGovernmentFundingForEnergyDevelopment_8824" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BusinessAcquisitionCostsRecognizedPostMergerAbstract" xlink:label="Locator_exc_BusinessAcquisitionCostsRecognizedPostMergerAbstract_8825"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BusinessAcquisitionsMiscellaneousTaxBenefits" xlink:label="Locator_exc_BusinessAcquisitionsMiscellaneousTaxBenefits_8826"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_BusinessAcquisitionCostsRecognizedPostMergerAbstract_8825" xlink:to="Locator_exc_BusinessAcquisitionsMiscellaneousTaxBenefits_8826" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BusinessAcquisitionCostsRecognizedPostMergerAbstract" xlink:label="Locator_exc_BusinessAcquisitionCostsRecognizedPostMergerAbstract_8827"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BusinessAcquisitionsTotalSettlement" xlink:label="Locator_exc_BusinessAcquisitionsTotalSettlement_8828"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_BusinessAcquisitionCostsRecognizedPostMergerAbstract_8827" xlink:to="Locator_exc_BusinessAcquisitionsTotalSettlement_8828" order="7.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BusinessAcquisitionCostsRecognizedPostMergerAbstract" xlink:label="Locator_exc_BusinessAcquisitionCostsRecognizedPostMergerAbstract_8829"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BusinessAcquisitionContributionsPerYear" xlink:label="Locator_exc_BusinessAcquisitionContributionsPerYear_8830"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_BusinessAcquisitionCostsRecognizedPostMergerAbstract_8829" xlink:to="Locator_exc_BusinessAcquisitionContributionsPerYear_8830" order="8.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BusinessAcquisitionCostsRecognizedPostMergerAbstract" xlink:label="Locator_exc_BusinessAcquisitionCostsRecognizedPostMergerAbstract_8831"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BusinessAcquisitionCostsRecognizedPostMergerFootnotesAbstract" xlink:label="Locator_exc_BusinessAcquisitionCostsRecognizedPostMergerFootnotesAbstract_8832"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_BusinessAcquisitionCostsRecognizedPostMergerAbstract_8831" xlink:to="Locator_exc_BusinessAcquisitionCostsRecognizedPostMergerFootnotesAbstract_8832" order="9.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BusinessAcquisitionCostsRecognizedPostMergerFootnotesAbstract" xlink:label="Locator_exc_BusinessAcquisitionCostsRecognizedPostMergerFootnotesAbstract_8833"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BusinessAcquisitionEquityContribution" xlink:label="Locator_exc_BusinessAcquisitionEquityContribution_8834"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_BusinessAcquisitionCostsRecognizedPostMergerFootnotesAbstract_8833" xlink:to="Locator_exc_BusinessAcquisitionEquityContribution_8834" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BusinessAcquisitionRegulatoryMattersAbstract" xlink:label="Locator_exc_BusinessAcquisitionRegulatoryMattersAbstract_8835"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BusinessAcquisitionConstructionCost" xlink:label="Locator_exc_BusinessAcquisitionConstructionCost_8836"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_BusinessAcquisitionRegulatoryMattersAbstract_8835" xlink:to="Locator_exc_BusinessAcquisitionConstructionCost_8836" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BusinessAcquisitionRegulatoryMattersAbstract" xlink:label="Locator_exc_BusinessAcquisitionRegulatoryMattersAbstract_8837"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BusinessAcquisitionConstructionTimeFrame" xlink:label="Locator_exc_BusinessAcquisitionConstructionTimeFrame_8838"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_BusinessAcquisitionRegulatoryMattersAbstract_8837" xlink:to="Locator_exc_BusinessAcquisitionConstructionTimeFrame_8838" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BusinessAcquisitionRegulatoryMattersAbstract" xlink:label="Locator_exc_BusinessAcquisitionRegulatoryMattersAbstract_8839"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BusinessAcquisitionDevelopmentOfNewGenerationCost" xlink:label="Locator_exc_BusinessAcquisitionDevelopmentOfNewGenerationCost_8840"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_BusinessAcquisitionRegulatoryMattersAbstract_8839" xlink:to="Locator_exc_BusinessAcquisitionDevelopmentOfNewGenerationCost_8840" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BusinessAcquisitionRegulatoryMattersAbstract" xlink:label="Locator_exc_BusinessAcquisitionRegulatoryMattersAbstract_8841"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BusinessAcquisitionExpectedNewGenerationMwh" xlink:label="Locator_exc_BusinessAcquisitionExpectedNewGenerationMwh_8842"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_BusinessAcquisitionRegulatoryMattersAbstract_8841" xlink:to="Locator_exc_BusinessAcquisitionExpectedNewGenerationMwh_8842" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BusinessAcquisitionRegulatoryMattersAbstract" xlink:label="Locator_exc_BusinessAcquisitionRegulatoryMattersAbstract_8843"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BusinessAcquisitionExpectedNewGenerationDevelopmentTimeFrame" xlink:label="Locator_exc_BusinessAcquisitionExpectedNewGenerationDevelopmentTimeFrame_8844"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_BusinessAcquisitionRegulatoryMattersAbstract_8843" xlink:to="Locator_exc_BusinessAcquisitionExpectedNewGenerationDevelopmentTimeFrame_8844" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BusinessAcquisitionRegulatoryMattersAbstract" xlink:label="Locator_exc_BusinessAcquisitionRegulatoryMattersAbstract_8845"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BusinessAcquisitionDivestureWattage" xlink:label="Locator_exc_BusinessAcquisitionDivestureWattage_8846"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_BusinessAcquisitionRegulatoryMattersAbstract_8845" xlink:to="Locator_exc_BusinessAcquisitionDivestureWattage_8846" order="7.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BusinessAcquisitionRegulatoryMattersAbstract" xlink:label="Locator_exc_BusinessAcquisitionRegulatoryMattersAbstract_8847"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BusinessAcquisitionDivestureSalesDays" xlink:label="Locator_exc_BusinessAcquisitionDivestureSalesDays_8848"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_BusinessAcquisitionRegulatoryMattersAbstract_8847" xlink:to="Locator_exc_BusinessAcquisitionDivestureSalesDays_8848" order="8.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BusinessAcquisitionRegulatoryMattersAbstract" xlink:label="Locator_exc_BusinessAcquisitionRegulatoryMattersAbstract_8849"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BusinessAcquisitionDivestureSalesDaysExtension" xlink:label="Locator_exc_BusinessAcquisitionDivestureSalesDaysExtension_8850"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_BusinessAcquisitionRegulatoryMattersAbstract_8849" xlink:to="Locator_exc_BusinessAcquisitionDivestureSalesDaysExtension_8850" order="9.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BusinessAcquisitionRegulatoryMattersAbstract" xlink:label="Locator_exc_BusinessAcquisitionRegulatoryMattersAbstract_8851"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BusinessAcquisitionProceedsAssetsHeldForSale" xlink:label="Locator_exc_BusinessAcquisitionProceedsAssetsHeldForSale_8852"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_BusinessAcquisitionRegulatoryMattersAbstract_8851" xlink:to="Locator_exc_BusinessAcquisitionProceedsAssetsHeldForSale_8852" order="10.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BusinessAcquisitionRegulatoryMattersAbstract" xlink:label="Locator_exc_BusinessAcquisitionRegulatoryMattersAbstract_8853"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BusinessAcquisitionGainLossOnSaleOfAssetsHeldForSale" xlink:label="Locator_exc_BusinessAcquisitionGainLossOnSaleOfAssetsHeldForSale_8854"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_BusinessAcquisitionRegulatoryMattersAbstract_8853" xlink:to="Locator_exc_BusinessAcquisitionGainLossOnSaleOfAssetsHeldForSale_8854" order="11.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BusinessAcquisitionRegulatoryMattersAbstract" xlink:label="Locator_exc_BusinessAcquisitionRegulatoryMattersAbstract_8855"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BusinessAcquisitionFairValueOfAssetsHeldForSale" xlink:label="Locator_exc_BusinessAcquisitionFairValueOfAssetsHeldForSale_8856"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_BusinessAcquisitionRegulatoryMattersAbstract_8855" xlink:to="Locator_exc_BusinessAcquisitionFairValueOfAssetsHeldForSale_8856" order="12.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BusinessAcquisitionRegulatoryMattersAbstract" xlink:label="Locator_exc_BusinessAcquisitionRegulatoryMattersAbstract_8857"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DoeLoanReceipt" xlink:label="Locator_exc_DoeLoanReceipt_8858"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_BusinessAcquisitionRegulatoryMattersAbstract_8857" xlink:to="Locator_exc_DoeLoanReceipt_8858" order="13.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessAcquisitionLineItems" xlink:label="Locator_us-gaap_BusinessAcquisitionLineItems_8263"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable" xlink:label="Locator_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_8264"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="Locator_us-gaap_BusinessAcquisitionLineItems_8263" xlink:to="Locator_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_8264" order="0.5" xbrldt:contextElement="segment" xbrldt:closed="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable" xlink:label="Locator_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_8561"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessAcquisitionAxis" xlink:label="Locator_us-gaap_BusinessAcquisitionAxis_8562"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_8561" xlink:to="Locator_us-gaap_BusinessAcquisitionAxis_8562" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessAcquisitionAxis" xlink:label="Locator_us-gaap_BusinessAcquisitionAxis_8233"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain" xlink:label="Locator_us-gaap_BusinessAcquisitionAcquireeDomain_8234"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="Locator_us-gaap_BusinessAcquisitionAxis_8233" xlink:to="Locator_us-gaap_BusinessAcquisitionAcquireeDomain_8234" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessAcquisitionAxis" xlink:label="Locator_us-gaap_BusinessAcquisitionAxis_8631"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain" xlink:label="Locator_us-gaap_BusinessAcquisitionAcquireeDomain_8632"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_us-gaap_BusinessAcquisitionAxis_8631" xlink:to="Locator_us-gaap_BusinessAcquisitionAcquireeDomain_8632" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain" xlink:label="Locator_us-gaap_BusinessAcquisitionAcquireeDomain_8633"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ConstellationEnergyGroupAcquisitionMember" xlink:label="Locator_exc_ConstellationEnergyGroupAcquisitionMember_8634"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_BusinessAcquisitionAcquireeDomain_8633" xlink:to="Locator_exc_ConstellationEnergyGroupAcquisitionMember_8634" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain" xlink:label="Locator_us-gaap_BusinessAcquisitionAcquireeDomain_8635"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_JohnDeereRenewablesAcquisitionMember" xlink:label="Locator_exc_JohnDeereRenewablesAcquisitionMember_8636"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_BusinessAcquisitionAcquireeDomain_8635" xlink:to="Locator_exc_JohnDeereRenewablesAcquisitionMember_8636" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain" xlink:label="Locator_us-gaap_BusinessAcquisitionAcquireeDomain_8637"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_WolfHollowAcquisitionMember" xlink:label="Locator_exc_WolfHollowAcquisitionMember_8638"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_BusinessAcquisitionAcquireeDomain_8637" xlink:to="Locator_exc_WolfHollowAcquisitionMember_8638" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain" xlink:label="Locator_us-gaap_BusinessAcquisitionAcquireeDomain_8639"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AntelopeValleySolarRanchOneAcquisitionMember" xlink:label="Locator_exc_AntelopeValleySolarRanchOneAcquisitionMember_8640"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_BusinessAcquisitionAcquireeDomain_8639" xlink:to="Locator_exc_AntelopeValleySolarRanchOneAcquisitionMember_8640" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain" xlink:label="Locator_us-gaap_BusinessAcquisitionAcquireeDomain_8641"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ShootingStarWindProjectMember" xlink:label="Locator_exc_ShootingStarWindProjectMember_8642"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_BusinessAcquisitionAcquireeDomain_8641" xlink:to="Locator_exc_ShootingStarWindProjectMember_8642" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain" xlink:label="Locator_us-gaap_BusinessAcquisitionAcquireeDomain_8643"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_WildcatLlcMember" xlink:label="Locator_exc_WildcatLlcMember_8644"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_BusinessAcquisitionAcquireeDomain_8643" xlink:to="Locator_exc_WildcatLlcMember_8644" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain" xlink:label="Locator_us-gaap_BusinessAcquisitionAcquireeDomain_8645"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_WhitetailWindEnergyMember" xlink:label="Locator_exc_WhitetailWindEnergyMember_8646"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_BusinessAcquisitionAcquireeDomain_8645" xlink:to="Locator_exc_WhitetailWindEnergyMember_8646" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain" xlink:label="Locator_us-gaap_BusinessAcquisitionAcquireeDomain_8647"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember" xlink:label="Locator_us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember_8648"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_BusinessAcquisitionAcquireeDomain_8647" xlink:to="Locator_us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember_8648" order="7.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable" xlink:label="Locator_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_8563"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ThirdPartyAgencyAxis" xlink:label="Locator_exc_ThirdPartyAgencyAxis_8564"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_8563" xlink:to="Locator_exc_ThirdPartyAgencyAxis_8564" order="2.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ThirdPartyAgencyAxis" xlink:label="Locator_exc_ThirdPartyAgencyAxis_8243"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AgencyDomain" xlink:label="Locator_exc_AgencyDomain_8244"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="Locator_exc_ThirdPartyAgencyAxis_8243" xlink:to="Locator_exc_AgencyDomain_8244" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ThirdPartyAgencyAxis" xlink:label="Locator_exc_ThirdPartyAgencyAxis_8683"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AgencyDomain" xlink:label="Locator_exc_AgencyDomain_8684"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_exc_ThirdPartyAgencyAxis_8683" xlink:to="Locator_exc_AgencyDomain_8684" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AgencyDomain" xlink:label="Locator_exc_AgencyDomain_8669"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_MarylandPublicServiceCommissionMember" xlink:label="Locator_exc_MarylandPublicServiceCommissionMember_8670"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_AgencyDomain_8669" xlink:to="Locator_exc_MarylandPublicServiceCommissionMember_8670" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AgencyDomain" xlink:label="Locator_exc_AgencyDomain_8671"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FederalEnergyRegulatoryCommissionMember" xlink:label="Locator_exc_FederalEnergyRegulatoryCommissionMember_8672"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_AgencyDomain_8671" xlink:to="Locator_exc_FederalEnergyRegulatoryCommissionMember_8672" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AgencyDomain" xlink:label="Locator_exc_AgencyDomain_8673"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PjmIndependentMarketMonitorMember" xlink:label="Locator_exc_PjmIndependentMarketMonitorMember_8674"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_AgencyDomain_8673" xlink:to="Locator_exc_PjmIndependentMarketMonitorMember_8674" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable" xlink:label="Locator_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_8565"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RangeAxis" xlink:label="Locator_us-gaap_RangeAxis_8566"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_8565" xlink:to="Locator_us-gaap_RangeAxis_8566" order="3.0"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable" xlink:label="Locator_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_8567"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_IncomeStatementLocationAxis" xlink:label="Locator_exc_IncomeStatementLocationAxis_8568"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_8567" xlink:to="Locator_exc_IncomeStatementLocationAxis_8568" order="4.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_IncomeStatementLocationAxis" xlink:label="Locator_exc_IncomeStatementLocationAxis_8241"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_IncomeStatementLocationDomain" xlink:label="Locator_exc_IncomeStatementLocationDomain_8242"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="Locator_exc_IncomeStatementLocationAxis_8241" xlink:to="Locator_exc_IncomeStatementLocationDomain_8242" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_IncomeStatementLocationAxis" xlink:label="Locator_exc_IncomeStatementLocationAxis_8675"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_IncomeStatementLocationDomain" xlink:label="Locator_exc_IncomeStatementLocationDomain_8676"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_exc_IncomeStatementLocationAxis_8675" xlink:to="Locator_exc_IncomeStatementLocationDomain_8676" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_IncomeStatementLocationDomain" xlink:label="Locator_exc_IncomeStatementLocationDomain_8677"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OperatingRevenuesMember" xlink:label="Locator_exc_OperatingRevenuesMember_8678"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_IncomeStatementLocationDomain_8677" xlink:to="Locator_exc_OperatingRevenuesMember_8678" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_IncomeStatementLocationDomain" xlink:label="Locator_exc_IncomeStatementLocationDomain_8679"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OperatingExpensesMember" xlink:label="Locator_exc_OperatingExpensesMember_8680"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_IncomeStatementLocationDomain_8679" xlink:to="Locator_exc_OperatingExpensesMember_8680" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_IncomeStatementLocationDomain" xlink:label="Locator_exc_IncomeStatementLocationDomain_8681"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OperatingIncomeMember" xlink:label="Locator_exc_OperatingIncomeMember_8682"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_IncomeStatementLocationDomain_8681" xlink:to="Locator_exc_OperatingIncomeMember_8682" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable" xlink:label="Locator_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_8559"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_8560"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_8559" xlink:to="Locator_dei_LegalEntityAxis_8560" order="0.0"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RestructuringCostAndReserveLineItems" xlink:label="Locator_us-gaap_RestructuringCostAndReserveLineItems_8481"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScheduleOfRestructuringAndRelatedCostsTable" xlink:label="Locator_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_8482"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="Locator_us-gaap_RestructuringCostAndReserveLineItems_8481" xlink:to="Locator_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_8482" order="0.5" xbrldt:contextElement="segment" xbrldt:closed="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScheduleOfRestructuringAndRelatedCostsTable" xlink:label="Locator_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_8573"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_8574"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_8573" xlink:to="Locator_dei_LegalEntityAxis_8574" order="0.0"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScheduleOfRestructuringAndRelatedCostsTable" xlink:label="Locator_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_8575"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BusinessAcquisitionRestructuringAxis" xlink:label="Locator_exc_BusinessAcquisitionRestructuringAxis_8576"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_8575" xlink:to="Locator_exc_BusinessAcquisitionRestructuringAxis_8576" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BusinessAcquisitionRestructuringAxis" xlink:label="Locator_exc_BusinessAcquisitionRestructuringAxis_8237"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BusinessAcquisitionRestructuringAcquireeDomain" xlink:label="Locator_exc_BusinessAcquisitionRestructuringAcquireeDomain_8238"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="Locator_exc_BusinessAcquisitionRestructuringAxis_8237" xlink:to="Locator_exc_BusinessAcquisitionRestructuringAcquireeDomain_8238" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BusinessAcquisitionRestructuringAxis" xlink:label="Locator_exc_BusinessAcquisitionRestructuringAxis_8655"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BusinessAcquisitionRestructuringAcquireeDomain" xlink:label="Locator_exc_BusinessAcquisitionRestructuringAcquireeDomain_8656"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_exc_BusinessAcquisitionRestructuringAxis_8655" xlink:to="Locator_exc_BusinessAcquisitionRestructuringAcquireeDomain_8656" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BusinessAcquisitionRestructuringAcquireeDomain" xlink:label="Locator_exc_BusinessAcquisitionRestructuringAcquireeDomain_8657"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ConstellationEnergyGroupAcquisitionMember" xlink:label="Locator_exc_ConstellationEnergyGroupAcquisitionMember_8658"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_BusinessAcquisitionRestructuringAcquireeDomain_8657" xlink:to="Locator_exc_ConstellationEnergyGroupAcquisitionMember_8658" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScheduleOfRestructuringAndRelatedCostsTable" xlink:label="Locator_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_8577"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RestructuringCostAndReserveAxis" xlink:label="Locator_us-gaap_RestructuringCostAndReserveAxis_8578"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_8577" xlink:to="Locator_us-gaap_RestructuringCostAndReserveAxis_8578" order="2.0"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RestructuringCostAndReserveAxis" xlink:label="Locator_us-gaap_RestructuringCostAndReserveAxis_8239"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_TypeOfReserveDomain" xlink:label="Locator_us-gaap_TypeOfReserveDomain_8240"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="Locator_us-gaap_RestructuringCostAndReserveAxis_8239" xlink:to="Locator_us-gaap_TypeOfReserveDomain_8240" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RestructuringCostAndReserveAxis" xlink:label="Locator_us-gaap_RestructuringCostAndReserveAxis_8659"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_TypeOfReserveDomain" xlink:label="Locator_us-gaap_TypeOfReserveDomain_8660"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_us-gaap_RestructuringCostAndReserveAxis_8659" xlink:to="Locator_us-gaap_TypeOfReserveDomain_8660" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_TypeOfReserveDomain" xlink:label="Locator_us-gaap_TypeOfReserveDomain_8661"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_EmployeeSeveranceMember" xlink:label="Locator_us-gaap_EmployeeSeveranceMember_8662"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_TypeOfReserveDomain_8661" xlink:to="Locator_us-gaap_EmployeeSeveranceMember_8662" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_TypeOfReserveDomain" xlink:label="Locator_us-gaap_TypeOfReserveDomain_8663"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OneTimeTerminationBenefitsMember" xlink:label="Locator_us-gaap_OneTimeTerminationBenefitsMember_8664"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_TypeOfReserveDomain_8663" xlink:to="Locator_us-gaap_OneTimeTerminationBenefitsMember_8664" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_TypeOfReserveDomain" xlink:label="Locator_us-gaap_TypeOfReserveDomain_8665"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StockCompensationPlanMember" xlink:label="Locator_us-gaap_StockCompensationPlanMember_8666"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_TypeOfReserveDomain_8665" xlink:to="Locator_us-gaap_StockCompensationPlanMember_8666" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_TypeOfReserveDomain" xlink:label="Locator_us-gaap_TypeOfReserveDomain_8667"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OtherSeveranceChargesMember" xlink:label="Locator_exc_OtherSeveranceChargesMember_8668"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_TypeOfReserveDomain_8667" xlink:to="Locator_exc_OtherSeveranceChargesMember_8668" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RestructuringCostAndReserveLineItems" xlink:label="Locator_us-gaap_RestructuringCostAndReserveLineItems_8873"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RestructuringCostsAbstract" xlink:label="Locator_us-gaap_RestructuringCostsAbstract_8874"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RestructuringCostAndReserveLineItems_8873" xlink:to="Locator_us-gaap_RestructuringCostsAbstract_8874" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RestructuringCostsAbstract" xlink:label="Locator_us-gaap_RestructuringCostsAbstract_8875"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RestructuringAndRelatedCostExpectedCost" xlink:label="Locator_us-gaap_RestructuringAndRelatedCostExpectedCost_8876"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RestructuringCostsAbstract_8875" xlink:to="Locator_us-gaap_RestructuringAndRelatedCostExpectedCost_8876" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RestructuringCostsAbstract" xlink:label="Locator_us-gaap_RestructuringCostsAbstract_8877"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RestructuringAndRelatedCostIncurredCost" xlink:label="Locator_us-gaap_RestructuringAndRelatedCostIncurredCost_8878"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RestructuringCostsAbstract_8877" xlink:to="Locator_us-gaap_RestructuringAndRelatedCostIncurredCost_8878" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RestructuringCostAndReserveLineItems" xlink:label="Locator_us-gaap_RestructuringCostAndReserveLineItems_8879"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RestructuringReserveRollForward" xlink:label="Locator_us-gaap_RestructuringReserveRollForward_8880"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RestructuringCostAndReserveLineItems_8879" xlink:to="Locator_us-gaap_RestructuringReserveRollForward_8880" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RestructuringReserveRollForward" xlink:label="Locator_us-gaap_RestructuringReserveRollForward_8881"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RestructuringReserve" xlink:label="Locator_us-gaap_RestructuringReserve_8882"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RestructuringReserveRollForward_8881" xlink:to="Locator_us-gaap_RestructuringReserve_8882" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RestructuringReserveRollForward" xlink:label="Locator_us-gaap_RestructuringReserveRollForward_8883"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SeveranceChargesExpense" xlink:label="Locator_exc_SeveranceChargesExpense_8884"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RestructuringReserveRollForward_8883" xlink:to="Locator_exc_SeveranceChargesExpense_8884" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RestructuringReserveRollForward" xlink:label="Locator_us-gaap_RestructuringReserveRollForward_8885"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_StockCompensationExpense" xlink:label="Locator_exc_StockCompensationExpense_8886"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RestructuringReserveRollForward_8885" xlink:to="Locator_exc_StockCompensationExpense_8886" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RestructuringReserveRollForward" xlink:label="Locator_us-gaap_RestructuringReserveRollForward_8887"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OtherExpenseCharges" xlink:label="Locator_exc_OtherExpenseCharges_8888"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RestructuringReserveRollForward_8887" xlink:to="Locator_exc_OtherExpenseCharges_8888" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RestructuringReserveRollForward" xlink:label="Locator_us-gaap_RestructuringReserveRollForward_8889"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_TotalSeveranceBenefitsExpense" xlink:label="Locator_exc_TotalSeveranceBenefitsExpense_8890"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RestructuringReserveRollForward_8889" xlink:to="Locator_exc_TotalSeveranceBenefitsExpense_8890" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RestructuringReserveRollForward" xlink:label="Locator_us-gaap_RestructuringReserveRollForward_8891"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RestructuringReservePeriodExpense" xlink:label="Locator_us-gaap_RestructuringReservePeriodExpense_8892"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RestructuringReserveRollForward_8891" xlink:to="Locator_us-gaap_RestructuringReservePeriodExpense_8892" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RestructuringReserveRollForward" xlink:label="Locator_us-gaap_RestructuringReserveRollForward_8893"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RestructuringReserveSettledWithCash" xlink:label="Locator_us-gaap_RestructuringReserveSettledWithCash_8894"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RestructuringReserveRollForward_8893" xlink:to="Locator_us-gaap_RestructuringReserveSettledWithCash_8894" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RestructuringReserveRollForward" xlink:label="Locator_us-gaap_RestructuringReserveRollForward_8895"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RestructuringReserveAccrualAdjustment" xlink:label="Locator_us-gaap_RestructuringReserveAccrualAdjustment_8896"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RestructuringReserveRollForward_8895" xlink:to="Locator_us-gaap_RestructuringReserveAccrualAdjustment_8896" order="7.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RestructuringReserveRollForward" xlink:label="Locator_us-gaap_RestructuringReserveRollForward_8897"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SeveranceCostsIntercompanyAllocation" xlink:label="Locator_exc_SeveranceCostsIntercompanyAllocation_8898"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RestructuringReserveRollForward_8897" xlink:to="Locator_exc_SeveranceCostsIntercompanyAllocation_8898" order="8.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RestructuringReserveRollForward" xlink:label="Locator_us-gaap_RestructuringReserveRollForward_8899"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_MergerRelatedRegulatoryAsset" xlink:label="Locator_exc_MergerRelatedRegulatoryAsset_8900"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RestructuringReserveRollForward_8899" xlink:to="Locator_exc_MergerRelatedRegulatoryAsset_8900" order="10.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RestructuringReserveRollForward" xlink:label="Locator_us-gaap_RestructuringReserveRollForward_8901"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_MergerRelatedSeveranceRegulatoryAsset" xlink:label="Locator_exc_MergerRelatedSeveranceRegulatoryAsset_8902"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RestructuringReserveRollForward_8901" xlink:to="Locator_exc_MergerRelatedSeveranceRegulatoryAsset_8902" order="11.0" xbrldt:usable="true"/> |
| | </definitionLink> |
| <definitionLink xlink:type="extended" xlink:role="http://exeloncorp.com/role/DisclosurePropertyPlantAndEquipmentTables"> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_9069"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_9070"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_dei_LegalEntityAxis_9069" xlink:to="Locator_dei_EntityDomain_9070" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_9071"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ExelonGenerationCoLLCMember" xlink:label="Locator_exc_ExelonGenerationCoLLCMember_9072"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_9071" xlink:to="Locator_exc_ExelonGenerationCoLLCMember_9072" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_9073"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CommonwealthEdisonCoMember" xlink:label="Locator_exc_CommonwealthEdisonCoMember_9074"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_9073" xlink:to="Locator_exc_CommonwealthEdisonCoMember_9074" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_9075"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PecoEnergyCoMember" xlink:label="Locator_exc_PecoEnergyCoMember_9076"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_9075" xlink:to="Locator_exc_PecoEnergyCoMember_9076" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_9077"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BaltimoreGasAndElectricCompanyMember" xlink:label="Locator_exc_BaltimoreGasAndElectricCompanyMember_9078"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_9077" xlink:to="Locator_exc_BaltimoreGasAndElectricCompanyMember_9078" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PropertyPlantEquipmentLineItems" xlink:label="Locator_exc_PropertyPlantEquipmentLineItems_9065"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PropertyPlantAndEquipmentTablesTable" xlink:label="Locator_exc_PropertyPlantAndEquipmentTablesTable_9066"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="Locator_exc_PropertyPlantEquipmentLineItems_9065" xlink:to="Locator_exc_PropertyPlantAndEquipmentTablesTable_9066" order="0.5" xbrldt:contextElement="segment" xbrldt:closed="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PropertyPlantAndEquipmentTablesTable" xlink:label="Locator_exc_PropertyPlantAndEquipmentTablesTable_9067"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_9068"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_exc_PropertyPlantAndEquipmentTablesTable_9067" xlink:to="Locator_dei_LegalEntityAxis_9068" order="0.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PropertyPlantEquipmentLineItems" xlink:label="Locator_exc_PropertyPlantEquipmentLineItems_9079"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ScheduleOfPropertyPlantAndEquipmentTableTextBlock" xlink:label="Locator_exc_ScheduleOfPropertyPlantAndEquipmentTableTextBlock_9080"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_PropertyPlantEquipmentLineItems_9079" xlink:to="Locator_exc_ScheduleOfPropertyPlantAndEquipmentTableTextBlock_9080" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PropertyPlantEquipmentLineItems" xlink:label="Locator_exc_PropertyPlantEquipmentLineItems_9081"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PropertyPlantAndEquipmentAverageServiceLifePercentageByAssetCategoryTableTextBlock" xlink:label="Locator_exc_PropertyPlantAndEquipmentAverageServiceLifePercentageByAssetCategoryTableTextBlock_9082"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_PropertyPlantEquipmentLineItems_9081" xlink:to="Locator_exc_PropertyPlantAndEquipmentAverageServiceLifePercentageByAssetCategoryTableTextBlock_9082" order="2.0" xbrldt:usable="true"/> |
| | </definitionLink> |
| <definitionLink xlink:type="extended" xlink:role="http://exeloncorp.com/role/DisclosurePropertyPlantAndEquipmentDetails"> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_9153"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_9154"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_dei_LegalEntityAxis_9153" xlink:to="Locator_dei_EntityDomain_9154" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_9155"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ExelonGenerationCoLLCMember" xlink:label="Locator_exc_ExelonGenerationCoLLCMember_9156"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_9155" xlink:to="Locator_exc_ExelonGenerationCoLLCMember_9156" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_9157"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CommonwealthEdisonCoMember" xlink:label="Locator_exc_CommonwealthEdisonCoMember_9158"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_9157" xlink:to="Locator_exc_CommonwealthEdisonCoMember_9158" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_9159"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PecoEnergyCoMember" xlink:label="Locator_exc_PecoEnergyCoMember_9160"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_9159" xlink:to="Locator_exc_PecoEnergyCoMember_9160" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_9161"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BaltimoreGasAndElectricCompanyMember" xlink:label="Locator_exc_BaltimoreGasAndElectricCompanyMember_9162"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_9161" xlink:to="Locator_exc_BaltimoreGasAndElectricCompanyMember_9162" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PropertyPlantAndEquipmentAverageServiceLifePercentageByAssetCategoryLineItems" xlink:label="Locator_exc_PropertyPlantAndEquipmentAverageServiceLifePercentageByAssetCategoryLineItems_9139"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PropertyPlantAndEquipmentAverageServiceLifePercentageByAssetCategoryTable" xlink:label="Locator_exc_PropertyPlantAndEquipmentAverageServiceLifePercentageByAssetCategoryTable_9140"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="Locator_exc_PropertyPlantAndEquipmentAverageServiceLifePercentageByAssetCategoryLineItems_9139" xlink:to="Locator_exc_PropertyPlantAndEquipmentAverageServiceLifePercentageByAssetCategoryTable_9140" order="0.5" xbrldt:contextElement="segment" xbrldt:closed="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PropertyPlantAndEquipmentAverageServiceLifePercentageByAssetCategoryTable" xlink:label="Locator_exc_PropertyPlantAndEquipmentAverageServiceLifePercentageByAssetCategoryTable_9149"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PropertyPlantAndEquipmentAverageServiceLifePercentageByAssetCategoryAxis" xlink:label="Locator_exc_PropertyPlantAndEquipmentAverageServiceLifePercentageByAssetCategoryAxis_9150"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_exc_PropertyPlantAndEquipmentAverageServiceLifePercentageByAssetCategoryTable_9149" xlink:to="Locator_exc_PropertyPlantAndEquipmentAverageServiceLifePercentageByAssetCategoryAxis_9150" order="0.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PropertyPlantAndEquipmentAverageServiceLifePercentageByAssetCategoryAxis" xlink:label="Locator_exc_PropertyPlantAndEquipmentAverageServiceLifePercentageByAssetCategoryAxis_9101"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain" xlink:label="Locator_us-gaap_PropertyPlantAndEquipmentTypeDomain_9102"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="Locator_exc_PropertyPlantAndEquipmentAverageServiceLifePercentageByAssetCategoryAxis_9101" xlink:to="Locator_us-gaap_PropertyPlantAndEquipmentTypeDomain_9102" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PropertyPlantAndEquipmentAverageServiceLifePercentageByAssetCategoryAxis" xlink:label="Locator_exc_PropertyPlantAndEquipmentAverageServiceLifePercentageByAssetCategoryAxis_9179"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain" xlink:label="Locator_us-gaap_PropertyPlantAndEquipmentTypeDomain_9180"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_exc_PropertyPlantAndEquipmentAverageServiceLifePercentageByAssetCategoryAxis_9179" xlink:to="Locator_us-gaap_PropertyPlantAndEquipmentTypeDomain_9180" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain" xlink:label="Locator_us-gaap_PropertyPlantAndEquipmentTypeDomain_9165"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ElectricTransmissionAndDistributionMember" xlink:label="Locator_us-gaap_ElectricTransmissionAndDistributionMember_9166"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_PropertyPlantAndEquipmentTypeDomain_9165" xlink:to="Locator_us-gaap_ElectricTransmissionAndDistributionMember_9166" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain" xlink:label="Locator_us-gaap_PropertyPlantAndEquipmentTypeDomain_9167"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ElectricGenerationEquipmentMember" xlink:label="Locator_us-gaap_ElectricGenerationEquipmentMember_9168"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_PropertyPlantAndEquipmentTypeDomain_9167" xlink:to="Locator_us-gaap_ElectricGenerationEquipmentMember_9168" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain" xlink:label="Locator_us-gaap_PropertyPlantAndEquipmentTypeDomain_9169"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_GasDistributionEquipmentMember" xlink:label="Locator_us-gaap_GasDistributionEquipmentMember_9170"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_PropertyPlantAndEquipmentTypeDomain_9169" xlink:to="Locator_us-gaap_GasDistributionEquipmentMember_9170" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain" xlink:label="Locator_us-gaap_PropertyPlantAndEquipmentTypeDomain_9171"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CommonElectricAndGasTAndDEquipmentMember" xlink:label="Locator_exc_CommonElectricAndGasTAndDEquipmentMember_9172"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_PropertyPlantAndEquipmentTypeDomain_9171" xlink:to="Locator_exc_CommonElectricAndGasTAndDEquipmentMember_9172" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain" xlink:label="Locator_us-gaap_PropertyPlantAndEquipmentTypeDomain_9173"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NuclearFuelMember" xlink:label="Locator_us-gaap_NuclearFuelMember_9174"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_PropertyPlantAndEquipmentTypeDomain_9173" xlink:to="Locator_us-gaap_NuclearFuelMember_9174" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain" xlink:label="Locator_us-gaap_PropertyPlantAndEquipmentTypeDomain_9175"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PublicUtilitiesPropertyPlantAndEquipmentConstructionWorkInProgressMember" xlink:label="Locator_exc_PublicUtilitiesPropertyPlantAndEquipmentConstructionWorkInProgressMember_9176"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_PropertyPlantAndEquipmentTypeDomain_9175" xlink:to="Locator_exc_PublicUtilitiesPropertyPlantAndEquipmentConstructionWorkInProgressMember_9176" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain" xlink:label="Locator_us-gaap_PropertyPlantAndEquipmentTypeDomain_9177"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherCapitalizedPropertyPlantAndEquipmentMember" xlink:label="Locator_us-gaap_OtherCapitalizedPropertyPlantAndEquipmentMember_9178"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_PropertyPlantAndEquipmentTypeDomain_9177" xlink:to="Locator_us-gaap_OtherCapitalizedPropertyPlantAndEquipmentMember_9178" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PropertyPlantAndEquipmentAverageServiceLifePercentageByAssetCategoryTable" xlink:label="Locator_exc_PropertyPlantAndEquipmentAverageServiceLifePercentageByAssetCategoryTable_9151"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_9152"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_exc_PropertyPlantAndEquipmentAverageServiceLifePercentageByAssetCategoryTable_9151" xlink:to="Locator_dei_LegalEntityAxis_9152" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PropertyPlantAndEquipmentAverageServiceLifePercentageByAssetCategoryLineItems" xlink:label="Locator_exc_PropertyPlantAndEquipmentAverageServiceLifePercentageByAssetCategoryLineItems_9213"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PropertyPlantAndEquipmentDepreciationAsPercentOfAverageServiceLifeRate" xlink:label="Locator_exc_PropertyPlantAndEquipmentDepreciationAsPercentOfAverageServiceLifeRate_9214"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_PropertyPlantAndEquipmentAverageServiceLifePercentageByAssetCategoryLineItems_9213" xlink:to="Locator_exc_PropertyPlantAndEquipmentDepreciationAsPercentOfAverageServiceLifeRate_9214" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PropertyPlantAndEquipmentLineItems" xlink:label="Locator_us-gaap_PropertyPlantAndEquipmentLineItems_9117"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScheduleOfPropertyPlantAndEquipmentTable" xlink:label="Locator_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_9118"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="Locator_us-gaap_PropertyPlantAndEquipmentLineItems_9117" xlink:to="Locator_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_9118" order="0.5" xbrldt:contextElement="segment" xbrldt:closed="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScheduleOfPropertyPlantAndEquipmentTable" xlink:label="Locator_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_9145"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis" xlink:label="Locator_us-gaap_PropertyPlantAndEquipmentByTypeAxis_9146"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_9145" xlink:to="Locator_us-gaap_PropertyPlantAndEquipmentByTypeAxis_9146" order="0.0"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis" xlink:label="Locator_us-gaap_PropertyPlantAndEquipmentByTypeAxis_9099"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain" xlink:label="Locator_us-gaap_PropertyPlantAndEquipmentTypeDomain_9100"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="Locator_us-gaap_PropertyPlantAndEquipmentByTypeAxis_9099" xlink:to="Locator_us-gaap_PropertyPlantAndEquipmentTypeDomain_9100" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis" xlink:label="Locator_us-gaap_PropertyPlantAndEquipmentByTypeAxis_9163"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain" xlink:label="Locator_us-gaap_PropertyPlantAndEquipmentTypeDomain_9164"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_us-gaap_PropertyPlantAndEquipmentByTypeAxis_9163" xlink:to="Locator_us-gaap_PropertyPlantAndEquipmentTypeDomain_9164" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScheduleOfPropertyPlantAndEquipmentTable" xlink:label="Locator_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_9147"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_9148"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_9147" xlink:to="Locator_dei_LegalEntityAxis_9148" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PropertyPlantAndEquipmentLineItems" xlink:label="Locator_us-gaap_PropertyPlantAndEquipmentLineItems_9181"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PropertyPlantAndEquipmentGross" xlink:label="Locator_us-gaap_PropertyPlantAndEquipmentGross_9182"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_PropertyPlantAndEquipmentLineItems_9181" xlink:to="Locator_us-gaap_PropertyPlantAndEquipmentGross_9182" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PropertyPlantAndEquipmentLineItems" xlink:label="Locator_us-gaap_PropertyPlantAndEquipmentLineItems_9183"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment" xlink:label="Locator_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_9184"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_PropertyPlantAndEquipmentLineItems_9183" xlink:to="Locator_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_9184" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PropertyPlantAndEquipmentLineItems" xlink:label="Locator_us-gaap_PropertyPlantAndEquipmentLineItems_9185"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PropertyPlantAndEquipmentNet" xlink:label="Locator_us-gaap_PropertyPlantAndEquipmentNet_9186"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_PropertyPlantAndEquipmentLineItems_9185" xlink:to="Locator_us-gaap_PropertyPlantAndEquipmentNet_9186" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PropertyPlantAndEquipmentLineItems" xlink:label="Locator_us-gaap_PropertyPlantAndEquipmentLineItems_9187"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PropertyPlantAndEquipmentUsefulLifeMinimum" xlink:label="Locator_us-gaap_PropertyPlantAndEquipmentUsefulLifeMinimum_9188"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_PropertyPlantAndEquipmentLineItems_9187" xlink:to="Locator_us-gaap_PropertyPlantAndEquipmentUsefulLifeMinimum_9188" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PropertyPlantAndEquipmentLineItems" xlink:label="Locator_us-gaap_PropertyPlantAndEquipmentLineItems_9189"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PropertyPlantAndEquipmentUsefulLifeMaximum" xlink:label="Locator_us-gaap_PropertyPlantAndEquipmentUsefulLifeMaximum_9190"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_PropertyPlantAndEquipmentLineItems_9189" xlink:to="Locator_us-gaap_PropertyPlantAndEquipmentUsefulLifeMaximum_9190" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PropertyPlantAndEquipmentLineItems" xlink:label="Locator_us-gaap_PropertyPlantAndEquipmentLineItems_9191"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PropertyPlantAndEquipmentFootnotesAbstract" xlink:label="Locator_exc_PropertyPlantAndEquipmentFootnotesAbstract_9192"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_PropertyPlantAndEquipmentLineItems_9191" xlink:to="Locator_exc_PropertyPlantAndEquipmentFootnotesAbstract_9192" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PropertyPlantAndEquipmentFootnotesAbstract" xlink:label="Locator_exc_PropertyPlantAndEquipmentFootnotesAbstract_9193"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NuclearFuelFabricationAndInstallationStage" xlink:label="Locator_exc_NuclearFuelFabricationAndInstallationStage_9194"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_PropertyPlantAndEquipmentFootnotesAbstract_9193" xlink:to="Locator_exc_NuclearFuelFabricationAndInstallationStage_9194" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PropertyPlantAndEquipmentFootnotesAbstract" xlink:label="Locator_exc_PropertyPlantAndEquipmentFootnotesAbstract_9195"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BuildingUnderCapitalLeaseNet" xlink:label="Locator_exc_BuildingUnderCapitalLeaseNet_9196"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_PropertyPlantAndEquipmentFootnotesAbstract_9195" xlink:to="Locator_exc_BuildingUnderCapitalLeaseNet_9196" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PropertyPlantAndEquipmentFootnotesAbstract" xlink:label="Locator_exc_PropertyPlantAndEquipmentFootnotesAbstract_9197"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BuildingUnderCapitalLeaseGross" xlink:label="Locator_exc_BuildingUnderCapitalLeaseGross_9198"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_PropertyPlantAndEquipmentFootnotesAbstract_9197" xlink:to="Locator_exc_BuildingUnderCapitalLeaseGross_9198" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PropertyPlantAndEquipmentFootnotesAbstract" xlink:label="Locator_exc_PropertyPlantAndEquipmentFootnotesAbstract_9199"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BuildingUnderCapitalLeaseAccumulatedDepreciation" xlink:label="Locator_exc_BuildingUnderCapitalLeaseAccumulatedDepreciation_9200"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_PropertyPlantAndEquipmentFootnotesAbstract_9199" xlink:to="Locator_exc_BuildingUnderCapitalLeaseAccumulatedDepreciation_9200" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PropertyPlantAndEquipmentFootnotesAbstract" xlink:label="Locator_exc_PropertyPlantAndEquipmentFootnotesAbstract_9201"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AccumulatedDepreciationForRegulatedProperty" xlink:label="Locator_exc_AccumulatedDepreciationForRegulatedProperty_9202"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_PropertyPlantAndEquipmentFootnotesAbstract_9201" xlink:to="Locator_exc_AccumulatedDepreciationForRegulatedProperty_9202" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PropertyPlantAndEquipmentFootnotesAbstract" xlink:label="Locator_exc_PropertyPlantAndEquipmentFootnotesAbstract_9203"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AccumulatedDepreciationForNonRegulatedProperty" xlink:label="Locator_exc_AccumulatedDepreciationForNonRegulatedProperty_9204"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_PropertyPlantAndEquipmentFootnotesAbstract_9203" xlink:to="Locator_exc_AccumulatedDepreciationForNonRegulatedProperty_9204" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PropertyPlantAndEquipmentFootnotesAbstract" xlink:label="Locator_exc_PropertyPlantAndEquipmentFootnotesAbstract_9205"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AccumulatedAmortizationNuclearFuel" xlink:label="Locator_exc_AccumulatedAmortizationNuclearFuel_9206"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_PropertyPlantAndEquipmentFootnotesAbstract_9205" xlink:to="Locator_exc_AccumulatedAmortizationNuclearFuel_9206" order="7.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PropertyPlantAndEquipmentFootnotesAbstract" xlink:label="Locator_exc_PropertyPlantAndEquipmentFootnotesAbstract_9207"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DepreciationForImpairedFossilPlants" xlink:label="Locator_exc_DepreciationForImpairedFossilPlants_9208"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_PropertyPlantAndEquipmentFootnotesAbstract_9207" xlink:to="Locator_exc_DepreciationForImpairedFossilPlants_9208" order="8.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PropertyPlantAndEquipmentLineItems" xlink:label="Locator_us-gaap_PropertyPlantAndEquipmentLineItems_9209"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ImpairmentOfFossilPlantsAbstract" xlink:label="Locator_exc_ImpairmentOfFossilPlantsAbstract_9210"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_PropertyPlantAndEquipmentLineItems_9209" xlink:to="Locator_exc_ImpairmentOfFossilPlantsAbstract_9210" order="7.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ImpairmentOfFossilPlantsAbstract" xlink:label="Locator_exc_ImpairmentOfFossilPlantsAbstract_9211"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ImpairmentOfFossilPlants" xlink:label="Locator_exc_ImpairmentOfFossilPlants_9212"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_ImpairmentOfFossilPlantsAbstract_9211" xlink:to="Locator_exc_ImpairmentOfFossilPlants_9212" order="1.0" xbrldt:usable="true"/> |
| | </definitionLink> |
| <definitionLink xlink:type="extended" xlink:role="http://exeloncorp.com/role/DisclosureJointlyOwnedElectricUtilityPlantExelonGenerationAndPECO"> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_9267"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_9268"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_dei_LegalEntityAxis_9267" xlink:to="Locator_dei_EntityDomain_9268" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_9269"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ExelonGenerationCoLLCMember" xlink:label="Locator_exc_ExelonGenerationCoLLCMember_9270"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_9269" xlink:to="Locator_exc_ExelonGenerationCoLLCMember_9270" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_9271"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PecoEnergyCoMember" xlink:label="Locator_exc_PecoEnergyCoMember_9272"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_9271" xlink:to="Locator_exc_PecoEnergyCoMember_9272" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_JointlyOwnedUtilityPlantNetOwnershipAmountLineItems" xlink:label="Locator_exc_JointlyOwnedUtilityPlantNetOwnershipAmountLineItems_9263"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_JointlyOwnedUtilityPlantNetOwnershipAmountTable" xlink:label="Locator_exc_JointlyOwnedUtilityPlantNetOwnershipAmountTable_9264"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="Locator_exc_JointlyOwnedUtilityPlantNetOwnershipAmountLineItems_9263" xlink:to="Locator_exc_JointlyOwnedUtilityPlantNetOwnershipAmountTable_9264" order="0.5" xbrldt:contextElement="segment" xbrldt:closed="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_JointlyOwnedUtilityPlantNetOwnershipAmountTable" xlink:label="Locator_exc_JointlyOwnedUtilityPlantNetOwnershipAmountTable_9265"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_9266"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_exc_JointlyOwnedUtilityPlantNetOwnershipAmountTable_9265" xlink:to="Locator_dei_LegalEntityAxis_9266" order="0.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_JointlyOwnedUtilityPlantNetOwnershipAmountLineItems" xlink:label="Locator_exc_JointlyOwnedUtilityPlantNetOwnershipAmountLineItems_9273"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ScheduleOfJointlyOwnedElectricUtilityPlantTextBlock" xlink:label="Locator_exc_ScheduleOfJointlyOwnedElectricUtilityPlantTextBlock_9274"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_JointlyOwnedUtilityPlantNetOwnershipAmountLineItems_9273" xlink:to="Locator_exc_ScheduleOfJointlyOwnedElectricUtilityPlantTextBlock_9274" order="1.0" xbrldt:usable="true"/> |
| | </definitionLink> |
| <definitionLink xlink:type="extended" xlink:role="http://exeloncorp.com/role/DisclosurePreferredSecuritiesExelonComEdAndPECO"> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_9293"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_9294"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_dei_LegalEntityAxis_9293" xlink:to="Locator_dei_EntityDomain_9294" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_9295"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CommonwealthEdisonCoMember" xlink:label="Locator_exc_CommonwealthEdisonCoMember_9296"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_9295" xlink:to="Locator_exc_CommonwealthEdisonCoMember_9296" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_9297"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PecoEnergyCoMember" xlink:label="Locator_exc_PecoEnergyCoMember_9298"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_9297" xlink:to="Locator_exc_PecoEnergyCoMember_9298" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PreferredSecuritiesLineItems" xlink:label="Locator_exc_PreferredSecuritiesLineItems_9289"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PreferredSecuritiesTable" xlink:label="Locator_exc_PreferredSecuritiesTable_9290"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="Locator_exc_PreferredSecuritiesLineItems_9289" xlink:to="Locator_exc_PreferredSecuritiesTable_9290" order="0.5" xbrldt:contextElement="segment" xbrldt:closed="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PreferredSecuritiesTable" xlink:label="Locator_exc_PreferredSecuritiesTable_9291"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_9292"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_exc_PreferredSecuritiesTable_9291" xlink:to="Locator_dei_LegalEntityAxis_9292" order="0.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PreferredSecuritiesLineItems" xlink:label="Locator_exc_PreferredSecuritiesLineItems_9299"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScheduleOfStockByClassTextBlock" xlink:label="Locator_us-gaap_ScheduleOfStockByClassTextBlock_9300"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_PreferredSecuritiesLineItems_9299" xlink:to="Locator_us-gaap_ScheduleOfStockByClassTextBlock_9300" order="1.0" xbrldt:usable="true"/> |
| | </definitionLink> |
| <definitionLink xlink:type="extended" xlink:role="http://exeloncorp.com/role/DisclosureQuarterlyDataTables"> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_9323"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_9324"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_dei_LegalEntityAxis_9323" xlink:to="Locator_dei_EntityDomain_9324" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_9325"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ExelonGenerationCoLLCMember" xlink:label="Locator_exc_ExelonGenerationCoLLCMember_9326"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_9325" xlink:to="Locator_exc_ExelonGenerationCoLLCMember_9326" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_9327"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CommonwealthEdisonCoMember" xlink:label="Locator_exc_CommonwealthEdisonCoMember_9328"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_9327" xlink:to="Locator_exc_CommonwealthEdisonCoMember_9328" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_9329"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PecoEnergyCoMember" xlink:label="Locator_exc_PecoEnergyCoMember_9330"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_9329" xlink:to="Locator_exc_PecoEnergyCoMember_9330" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_9331"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BaltimoreGasAndElectricCompanyMember" xlink:label="Locator_exc_BaltimoreGasAndElectricCompanyMember_9332"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_9331" xlink:to="Locator_exc_BaltimoreGasAndElectricCompanyMember_9332" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_QuarterlyFinancialDataLineItems" xlink:label="Locator_exc_QuarterlyFinancialDataLineItems_9319"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_QuarterlyFinancialDataTable" xlink:label="Locator_exc_QuarterlyFinancialDataTable_9320"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="Locator_exc_QuarterlyFinancialDataLineItems_9319" xlink:to="Locator_exc_QuarterlyFinancialDataTable_9320" order="0.5" xbrldt:contextElement="segment" xbrldt:closed="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_QuarterlyFinancialDataTable" xlink:label="Locator_exc_QuarterlyFinancialDataTable_9321"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_9322"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_exc_QuarterlyFinancialDataTable_9321" xlink:to="Locator_dei_LegalEntityAxis_9322" order="0.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_QuarterlyFinancialDataLineItems" xlink:label="Locator_exc_QuarterlyFinancialDataLineItems_9333"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_QuarterlyFinancialInformationTableTextBlock" xlink:label="Locator_exc_QuarterlyFinancialInformationTableTextBlock_9334"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_QuarterlyFinancialDataLineItems_9333" xlink:to="Locator_exc_QuarterlyFinancialInformationTableTextBlock_9334" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_QuarterlyFinancialDataLineItems" xlink:label="Locator_exc_QuarterlyFinancialDataLineItems_9335"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AverageBasicAndDilutedSharesAndNetIncomePerBasicAndDilutedShareTextBlock" xlink:label="Locator_exc_AverageBasicAndDilutedSharesAndNetIncomePerBasicAndDilutedShareTextBlock_9336"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_QuarterlyFinancialDataLineItems_9335" xlink:to="Locator_exc_AverageBasicAndDilutedSharesAndNetIncomePerBasicAndDilutedShareTextBlock_9336" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_QuarterlyFinancialDataLineItems" xlink:label="Locator_exc_QuarterlyFinancialDataLineItems_9337"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PerShareInformationTextBlock" xlink:label="Locator_exc_PerShareInformationTextBlock_9338"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_QuarterlyFinancialDataLineItems_9337" xlink:to="Locator_exc_PerShareInformationTextBlock_9338" order="3.0" xbrldt:usable="true"/> |
| | </definitionLink> |
| <definitionLink xlink:type="extended" xlink:role="http://exeloncorp.com/role/DisclosureRelatedPartyTransactionsTables"> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_9361"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_9362"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_dei_LegalEntityAxis_9361" xlink:to="Locator_dei_EntityDomain_9362" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_9363"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ExelonGenerationCoLLCMember" xlink:label="Locator_exc_ExelonGenerationCoLLCMember_9364"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_9363" xlink:to="Locator_exc_ExelonGenerationCoLLCMember_9364" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_9365"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CommonwealthEdisonCoMember" xlink:label="Locator_exc_CommonwealthEdisonCoMember_9366"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_9365" xlink:to="Locator_exc_CommonwealthEdisonCoMember_9366" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_9367"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PecoEnergyCoMember" xlink:label="Locator_exc_PecoEnergyCoMember_9368"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_9367" xlink:to="Locator_exc_PecoEnergyCoMember_9368" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_9369"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BaltimoreGasAndElectricCompanyMember" xlink:label="Locator_exc_BaltimoreGasAndElectricCompanyMember_9370"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_9369" xlink:to="Locator_exc_BaltimoreGasAndElectricCompanyMember_9370" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ScheduleOfRelatedPartyTransactionsByRelatedPartyTablesLineItems" xlink:label="Locator_exc_ScheduleOfRelatedPartyTransactionsByRelatedPartyTablesLineItems_9357"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:label="Locator_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_9358"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="Locator_exc_ScheduleOfRelatedPartyTransactionsByRelatedPartyTablesLineItems_9357" xlink:to="Locator_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_9358" order="0.5" xbrldt:contextElement="segment" xbrldt:closed="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:label="Locator_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_9359"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_9360"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_9359" xlink:to="Locator_dei_LegalEntityAxis_9360" order="0.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ScheduleOfRelatedPartyTransactionsByRelatedPartyTablesLineItems" xlink:label="Locator_exc_ScheduleOfRelatedPartyTransactionsByRelatedPartyTablesLineItems_9371"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RelatedPartyTransactionsIncomeStatementDisclosureTextBlock" xlink:label="Locator_exc_RelatedPartyTransactionsIncomeStatementDisclosureTextBlock_9372"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_ScheduleOfRelatedPartyTransactionsByRelatedPartyTablesLineItems_9371" xlink:to="Locator_exc_RelatedPartyTransactionsIncomeStatementDisclosureTextBlock_9372" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ScheduleOfRelatedPartyTransactionsByRelatedPartyTablesLineItems" xlink:label="Locator_exc_ScheduleOfRelatedPartyTransactionsByRelatedPartyTablesLineItems_9373"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RelatedPartyTransactionsBalanceSheetDisclosureTextBlock" xlink:label="Locator_exc_RelatedPartyTransactionsBalanceSheetDisclosureTextBlock_9374"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_ScheduleOfRelatedPartyTransactionsByRelatedPartyTablesLineItems_9373" xlink:to="Locator_exc_RelatedPartyTransactionsBalanceSheetDisclosureTextBlock_9374" order="2.0" xbrldt:usable="true"/> |
| | </definitionLink> |
| <definitionLink xlink:type="extended" xlink:role="http://exeloncorp.com/role/DisclosurePreferredSecuritiesTables"> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_9417"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_9418"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_dei_LegalEntityAxis_9417" xlink:to="Locator_dei_EntityDomain_9418" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_9419"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PecoEnergyCoMember" xlink:label="Locator_exc_PecoEnergyCoMember_9420"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_9419" xlink:to="Locator_exc_PecoEnergyCoMember_9420" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ScheduleOfRedeemablePreferredLineItems" xlink:label="Locator_exc_ScheduleOfRedeemablePreferredLineItems_9411"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ScheduleOfRedeemablePreferredStockTable" xlink:label="Locator_exc_ScheduleOfRedeemablePreferredStockTable_9412"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="Locator_exc_ScheduleOfRedeemablePreferredLineItems_9411" xlink:to="Locator_exc_ScheduleOfRedeemablePreferredStockTable_9412" order="0.5" xbrldt:contextElement="segment" xbrldt:closed="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ScheduleOfRedeemablePreferredStockTable" xlink:label="Locator_exc_ScheduleOfRedeemablePreferredStockTable_9415"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_9416"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_exc_ScheduleOfRedeemablePreferredStockTable_9415" xlink:to="Locator_dei_LegalEntityAxis_9416" order="0.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ScheduleOfRedeemablePreferredLineItems" xlink:label="Locator_exc_ScheduleOfRedeemablePreferredLineItems_9421"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_TemporaryEquityTableTextBlock" xlink:label="Locator_us-gaap_TemporaryEquityTableTextBlock_9422"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_ScheduleOfRedeemablePreferredLineItems_9421" xlink:to="Locator_us-gaap_TemporaryEquityTableTextBlock_9422" order="1.0" xbrldt:usable="true"/> |
| | </definitionLink> |
| <definitionLink xlink:type="extended" xlink:role="http://exeloncorp.com/role/DisclosureJointlyOwnedElectricUtilityPlantTables"> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_9433"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_9434"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="Locator_dei_LegalEntityAxis_9433" xlink:to="Locator_dei_EntityDomain_9434" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_9441"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_9442"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_dei_LegalEntityAxis_9441" xlink:to="Locator_dei_EntityDomain_9442" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_9443"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ExelonGenerationCoLLCMember" xlink:label="Locator_exc_ExelonGenerationCoLLCMember_9444"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_9443" xlink:to="Locator_exc_ExelonGenerationCoLLCMember_9444" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_9445"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PecoEnergyCoMember" xlink:label="Locator_exc_PecoEnergyCoMember_9446"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_9445" xlink:to="Locator_exc_PecoEnergyCoMember_9446" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_JointlyOwnedUtilityPlantNetOwnershipAmountTablesLineItems" xlink:label="Locator_exc_JointlyOwnedUtilityPlantNetOwnershipAmountTablesLineItems_9437"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_JointlyOwnedUtilityPlantNetOwnershipAmountTablesTable" xlink:label="Locator_exc_JointlyOwnedUtilityPlantNetOwnershipAmountTablesTable_9438"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="Locator_exc_JointlyOwnedUtilityPlantNetOwnershipAmountTablesLineItems_9437" xlink:to="Locator_exc_JointlyOwnedUtilityPlantNetOwnershipAmountTablesTable_9438" order="0.5" xbrldt:contextElement="segment" xbrldt:closed="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_JointlyOwnedUtilityPlantNetOwnershipAmountTablesTable" xlink:label="Locator_exc_JointlyOwnedUtilityPlantNetOwnershipAmountTablesTable_9439"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_9440"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_exc_JointlyOwnedUtilityPlantNetOwnershipAmountTablesTable_9439" xlink:to="Locator_dei_LegalEntityAxis_9440" order="0.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_JointlyOwnedUtilityPlantNetOwnershipAmountTablesLineItems" xlink:label="Locator_exc_JointlyOwnedUtilityPlantNetOwnershipAmountTablesLineItems_9447"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScheduleOfJointlyOwnedUtilityPlantsTextBlock" xlink:label="Locator_us-gaap_ScheduleOfJointlyOwnedUtilityPlantsTextBlock_9448"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_JointlyOwnedUtilityPlantNetOwnershipAmountTablesLineItems_9447" xlink:to="Locator_us-gaap_ScheduleOfJointlyOwnedUtilityPlantsTextBlock_9448" order="1.0" xbrldt:usable="true"/> |
| | </definitionLink> |
| <definitionLink xlink:type="extended" xlink:role="http://exeloncorp.com/role/DisclosureIntangibleAssetsTables"> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_9471"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_9472"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_dei_LegalEntityAxis_9471" xlink:to="Locator_dei_EntityDomain_9472" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_9473"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ExelonGenerationCoLLCMember" xlink:label="Locator_exc_ExelonGenerationCoLLCMember_9474"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_9473" xlink:to="Locator_exc_ExelonGenerationCoLLCMember_9474" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_9475"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CommonwealthEdisonCoMember" xlink:label="Locator_exc_CommonwealthEdisonCoMember_9476"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_9475" xlink:to="Locator_exc_CommonwealthEdisonCoMember_9476" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_9477"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PecoEnergyCoMember" xlink:label="Locator_exc_PecoEnergyCoMember_9478"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_9477" xlink:to="Locator_exc_PecoEnergyCoMember_9478" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_9479"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BaltimoreGasAndElectricCompanyMember" xlink:label="Locator_exc_BaltimoreGasAndElectricCompanyMember_9480"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_9479" xlink:to="Locator_exc_BaltimoreGasAndElectricCompanyMember_9480" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ScheduleOfGoodwillAndIntangibleAssetsLineItems" xlink:label="Locator_exc_ScheduleOfGoodwillAndIntangibleAssetsLineItems_9465"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ScheduleOfGoodwillAndIntangibleAssetsTable" xlink:label="Locator_exc_ScheduleOfGoodwillAndIntangibleAssetsTable_9466"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="Locator_exc_ScheduleOfGoodwillAndIntangibleAssetsLineItems_9465" xlink:to="Locator_exc_ScheduleOfGoodwillAndIntangibleAssetsTable_9466" order="0.5" xbrldt:contextElement="segment" xbrldt:closed="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ScheduleOfGoodwillAndIntangibleAssetsTable" xlink:label="Locator_exc_ScheduleOfGoodwillAndIntangibleAssetsTable_9469"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_9470"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_exc_ScheduleOfGoodwillAndIntangibleAssetsTable_9469" xlink:to="Locator_dei_LegalEntityAxis_9470" order="0.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ScheduleOfGoodwillAndIntangibleAssetsLineItems" xlink:label="Locator_exc_ScheduleOfGoodwillAndIntangibleAssetsLineItems_9481"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScheduleOfGoodwillTextBlock" xlink:label="Locator_us-gaap_ScheduleOfGoodwillTextBlock_9482"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_ScheduleOfGoodwillAndIntangibleAssetsLineItems_9481" xlink:to="Locator_us-gaap_ScheduleOfGoodwillTextBlock_9482" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ScheduleOfGoodwillAndIntangibleAssetsLineItems" xlink:label="Locator_exc_ScheduleOfGoodwillAndIntangibleAssetsLineItems_9483"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScheduleOfFiniteLivedIntangibleAssetsByMajorClassTextBlock" xlink:label="Locator_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsByMajorClassTextBlock_9484"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_ScheduleOfGoodwillAndIntangibleAssetsLineItems_9483" xlink:to="Locator_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsByMajorClassTextBlock_9484" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ScheduleOfGoodwillAndIntangibleAssetsLineItems" xlink:label="Locator_exc_ScheduleOfGoodwillAndIntangibleAssetsLineItems_9485"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ScheduleOfFiniteLivedIntangibleAssetsAmortizationExpenseTextBlock" xlink:label="Locator_exc_ScheduleOfFiniteLivedIntangibleAssetsAmortizationExpenseTextBlock_9486"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_ScheduleOfGoodwillAndIntangibleAssetsLineItems_9485" xlink:to="Locator_exc_ScheduleOfFiniteLivedIntangibleAssetsAmortizationExpenseTextBlock_9486" order="3.0" xbrldt:usable="true"/> |
| | </definitionLink> |
| <definitionLink xlink:type="extended" xlink:role="http://exeloncorp.com/role/AccountsReceivableDetails"> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FinancingReceivableRecordedInvestmentLineItems" xlink:label="Locator_us-gaap_FinancingReceivableRecordedInvestmentLineItems_9527"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScheduleOfFinancingReceivableRecordedInvestmentCreditQualityIndicatorTable" xlink:label="Locator_us-gaap_ScheduleOfFinancingReceivableRecordedInvestmentCreditQualityIndicatorTable_9528"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="Locator_us-gaap_FinancingReceivableRecordedInvestmentLineItems_9527" xlink:to="Locator_us-gaap_ScheduleOfFinancingReceivableRecordedInvestmentCreditQualityIndicatorTable_9528" order="0.5" xbrldt:contextElement="segment" xbrldt:closed="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScheduleOfFinancingReceivableRecordedInvestmentCreditQualityIndicatorTable" xlink:label="Locator_us-gaap_ScheduleOfFinancingReceivableRecordedInvestmentCreditQualityIndicatorTable_9531"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_9532"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_us-gaap_ScheduleOfFinancingReceivableRecordedInvestmentCreditQualityIndicatorTable_9531" xlink:to="Locator_dei_LegalEntityAxis_9532" order="0.0"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_9535"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_9536"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_dei_LegalEntityAxis_9535" xlink:to="Locator_dei_EntityDomain_9536" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_9537"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ExelonGenerationCoLLCMember" xlink:label="Locator_exc_ExelonGenerationCoLLCMember_9538"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_9537" xlink:to="Locator_exc_ExelonGenerationCoLLCMember_9538" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_9539"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CommonwealthEdisonCoMember" xlink:label="Locator_exc_CommonwealthEdisonCoMember_9540"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_9539" xlink:to="Locator_exc_CommonwealthEdisonCoMember_9540" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_9541"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PecoEnergyCoMember" xlink:label="Locator_exc_PecoEnergyCoMember_9542"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_9541" xlink:to="Locator_exc_PecoEnergyCoMember_9542" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_9543"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BaltimoreGasAndElectricCompanyMember" xlink:label="Locator_exc_BaltimoreGasAndElectricCompanyMember_9544"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_9543" xlink:to="Locator_exc_BaltimoreGasAndElectricCompanyMember_9544" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScheduleOfFinancingReceivableRecordedInvestmentCreditQualityIndicatorTable" xlink:label="Locator_us-gaap_ScheduleOfFinancingReceivableRecordedInvestmentCreditQualityIndicatorTable_9533"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FinancingReceivableInformationByCreditQualityIndicatorAxis" xlink:label="Locator_us-gaap_FinancingReceivableInformationByCreditQualityIndicatorAxis_9534"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_us-gaap_ScheduleOfFinancingReceivableRecordedInvestmentCreditQualityIndicatorTable_9533" xlink:to="Locator_us-gaap_FinancingReceivableInformationByCreditQualityIndicatorAxis_9534" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FinancingReceivableInformationByCreditQualityIndicatorAxis" xlink:label="Locator_us-gaap_FinancingReceivableInformationByCreditQualityIndicatorAxis_9545"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_InternallyAssignedGradeDomain" xlink:label="Locator_exc_InternallyAssignedGradeDomain_9546"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_us-gaap_FinancingReceivableInformationByCreditQualityIndicatorAxis_9545" xlink:to="Locator_exc_InternallyAssignedGradeDomain_9546" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_InternallyAssignedGradeDomain" xlink:label="Locator_exc_InternallyAssignedGradeDomain_9547"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_LowRiskMember" xlink:label="Locator_exc_LowRiskMember_9548"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_InternallyAssignedGradeDomain_9547" xlink:to="Locator_exc_LowRiskMember_9548" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_InternallyAssignedGradeDomain" xlink:label="Locator_exc_InternallyAssignedGradeDomain_9549"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_LowToMediumRiskMember" xlink:label="Locator_exc_LowToMediumRiskMember_9550"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_InternallyAssignedGradeDomain_9549" xlink:to="Locator_exc_LowToMediumRiskMember_9550" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_InternallyAssignedGradeDomain" xlink:label="Locator_exc_InternallyAssignedGradeDomain_9551"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_MediumRiskMember" xlink:label="Locator_exc_MediumRiskMember_9552"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_InternallyAssignedGradeDomain_9551" xlink:to="Locator_exc_MediumRiskMember_9552" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_InternallyAssignedGradeDomain" xlink:label="Locator_exc_InternallyAssignedGradeDomain_9553"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_HighRiskMember" xlink:label="Locator_exc_HighRiskMember_9554"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_InternallyAssignedGradeDomain_9553" xlink:to="Locator_exc_HighRiskMember_9554" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FinancingReceivableRecordedInvestmentLineItems" xlink:label="Locator_us-gaap_FinancingReceivableRecordedInvestmentLineItems_9571"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FinancingReceivable" xlink:label="Locator_us-gaap_FinancingReceivable_9572"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_FinancingReceivableRecordedInvestmentLineItems_9571" xlink:to="Locator_us-gaap_FinancingReceivable_9572" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FinancingReceivableRecordedInvestmentLineItems" xlink:label="Locator_us-gaap_FinancingReceivableRecordedInvestmentLineItems_9573"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FinancingReceivableAllowanceForCreditLosses" xlink:label="Locator_us-gaap_FinancingReceivableAllowanceForCreditLosses_9574"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_FinancingReceivableRecordedInvestmentLineItems_9573" xlink:to="Locator_us-gaap_FinancingReceivableAllowanceForCreditLosses_9574" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AccountsNotesAndLoansReceivableLineItems" xlink:label="Locator_us-gaap_AccountsNotesAndLoansReceivableLineItems_9509"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable" xlink:label="Locator_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_9510"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="Locator_us-gaap_AccountsNotesAndLoansReceivableLineItems_9509" xlink:to="Locator_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_9510" order="0.5" xbrldt:contextElement="segment" xbrldt:closed="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable" xlink:label="Locator_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_9529"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_9530"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_9529" xlink:to="Locator_dei_LegalEntityAxis_9530" order="0.0"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AccountsNotesAndLoansReceivableLineItems" xlink:label="Locator_us-gaap_AccountsNotesAndLoansReceivableLineItems_9555"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AccountsNotesAndLoansReceivableNetCurrentAbstract" xlink:label="Locator_us-gaap_AccountsNotesAndLoansReceivableNetCurrentAbstract_9556"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_AccountsNotesAndLoansReceivableLineItems_9555" xlink:to="Locator_us-gaap_AccountsNotesAndLoansReceivableNetCurrentAbstract_9556" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AccountsNotesAndLoansReceivableNetCurrentAbstract" xlink:label="Locator_us-gaap_AccountsNotesAndLoansReceivableNetCurrentAbstract_9557"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_UnbilledContractsReceivable" xlink:label="Locator_us-gaap_UnbilledContractsReceivable_9558"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_AccountsNotesAndLoansReceivableNetCurrentAbstract_9557" xlink:to="Locator_us-gaap_UnbilledContractsReceivable_9558" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AccountsNotesAndLoansReceivableNetCurrentAbstract" xlink:label="Locator_us-gaap_AccountsNotesAndLoansReceivableNetCurrentAbstract_9559"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent" xlink:label="Locator_us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent_9560"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_AccountsNotesAndLoansReceivableNetCurrentAbstract_9559" xlink:to="Locator_us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent_9560" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AccountsNotesAndLoansReceivableNetCurrentAbstract" xlink:label="Locator_us-gaap_AccountsNotesAndLoansReceivableNetCurrentAbstract_9561"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AccountsNotesAndLoansReceivableNetCurrentFootnotesAbstract" xlink:label="Locator_exc_AccountsNotesAndLoansReceivableNetCurrentFootnotesAbstract_9562"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_AccountsNotesAndLoansReceivableNetCurrentAbstract_9561" xlink:to="Locator_exc_AccountsNotesAndLoansReceivableNetCurrentFootnotesAbstract_9562" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AccountsNotesAndLoansReceivableNetCurrentFootnotesAbstract" xlink:label="Locator_exc_AccountsNotesAndLoansReceivableNetCurrentFootnotesAbstract_9563"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CurrentFinancingReceivableAllowanceForCreditLosses" xlink:label="Locator_exc_CurrentFinancingReceivableAllowanceForCreditLosses_9564"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_AccountsNotesAndLoansReceivableNetCurrentFootnotesAbstract_9563" xlink:to="Locator_exc_CurrentFinancingReceivableAllowanceForCreditLosses_9564" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AccountsNotesAndLoansReceivableLineItems" xlink:label="Locator_us-gaap_AccountsNotesAndLoansReceivableLineItems_9565"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AccountsReceivableAdditionalDisclosuresAbstract" xlink:label="Locator_us-gaap_AccountsReceivableAdditionalDisclosuresAbstract_9566"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_AccountsNotesAndLoansReceivableLineItems_9565" xlink:to="Locator_us-gaap_AccountsReceivableAdditionalDisclosuresAbstract_9566" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AccountsReceivableAdditionalDisclosuresAbstract" xlink:label="Locator_us-gaap_AccountsReceivableAdditionalDisclosuresAbstract_9567"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PledgedAssetsSeparatelyReportedOnStatementOfFinancialPositionAtFairValue" xlink:label="Locator_us-gaap_PledgedAssetsSeparatelyReportedOnStatementOfFinancialPositionAtFairValue_9568"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_AccountsReceivableAdditionalDisclosuresAbstract_9567" xlink:to="Locator_us-gaap_PledgedAssetsSeparatelyReportedOnStatementOfFinancialPositionAtFairValue_9568" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AccountsReceivableAdditionalDisclosuresAbstract" xlink:label="Locator_us-gaap_AccountsReceivableAdditionalDisclosuresAbstract_9569"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PledgedAssetsNotSeparatelyReportedFinanceReceivables" xlink:label="Locator_us-gaap_PledgedAssetsNotSeparatelyReportedFinanceReceivables_9570"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_AccountsReceivableAdditionalDisclosuresAbstract_9569" xlink:to="Locator_us-gaap_PledgedAssetsNotSeparatelyReportedFinanceReceivables_9570" order="2.0" xbrldt:usable="true"/> |
| | </definitionLink> |
| <definitionLink xlink:type="extended" xlink:role="http://exeloncorp.com/role/JointlyOwnedElectricUtilityPlantDetails"> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_9641"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_9642"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_dei_LegalEntityAxis_9641" xlink:to="Locator_dei_EntityDomain_9642" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_9643"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ExelonGenerationCoLLCMember" xlink:label="Locator_exc_ExelonGenerationCoLLCMember_9644"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_9643" xlink:to="Locator_exc_ExelonGenerationCoLLCMember_9644" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_9645"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PecoEnergyCoMember" xlink:label="Locator_exc_PecoEnergyCoMember_9646"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_9645" xlink:to="Locator_exc_PecoEnergyCoMember_9646" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_JointlyOwnedUtilityPlantInterestsLineItems" xlink:label="Locator_us-gaap_JointlyOwnedUtilityPlantInterestsLineItems_9613"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_JointlyOwnedUtilityPlantInterestsTable" xlink:label="Locator_us-gaap_JointlyOwnedUtilityPlantInterestsTable_9614"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="Locator_us-gaap_JointlyOwnedUtilityPlantInterestsLineItems_9613" xlink:to="Locator_us-gaap_JointlyOwnedUtilityPlantInterestsTable_9614" order="0.5" xbrldt:contextElement="segment" xbrldt:closed="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_JointlyOwnedUtilityPlantInterestsTable" xlink:label="Locator_us-gaap_JointlyOwnedUtilityPlantInterestsTable_9635"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_9636"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_us-gaap_JointlyOwnedUtilityPlantInterestsTable_9635" xlink:to="Locator_dei_LegalEntityAxis_9636" order="0.0"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_JointlyOwnedUtilityPlantInterestsTable" xlink:label="Locator_us-gaap_JointlyOwnedUtilityPlantInterestsTable_9637"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_JointlyOwnedUtilityPlantAxis" xlink:label="Locator_us-gaap_JointlyOwnedUtilityPlantAxis_9638"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_us-gaap_JointlyOwnedUtilityPlantInterestsTable_9637" xlink:to="Locator_us-gaap_JointlyOwnedUtilityPlantAxis_9638" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_JointlyOwnedUtilityPlantAxis" xlink:label="Locator_us-gaap_JointlyOwnedUtilityPlantAxis_9605"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_JointlyOwnedUtilityPlantDomain" xlink:label="Locator_us-gaap_JointlyOwnedUtilityPlantDomain_9606"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="Locator_us-gaap_JointlyOwnedUtilityPlantAxis_9605" xlink:to="Locator_us-gaap_JointlyOwnedUtilityPlantDomain_9606" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_JointlyOwnedUtilityPlantAxis" xlink:label="Locator_us-gaap_JointlyOwnedUtilityPlantAxis_9647"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_JointlyOwnedUtilityPlantDomain" xlink:label="Locator_us-gaap_JointlyOwnedUtilityPlantDomain_9648"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_us-gaap_JointlyOwnedUtilityPlantAxis_9647" xlink:to="Locator_us-gaap_JointlyOwnedUtilityPlantDomain_9648" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_JointlyOwnedUtilityPlantDomain" xlink:label="Locator_us-gaap_JointlyOwnedUtilityPlantDomain_9649"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NuclearGenerationMember" xlink:label="Locator_exc_NuclearGenerationMember_9650"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_JointlyOwnedUtilityPlantDomain_9649" xlink:to="Locator_exc_NuclearGenerationMember_9650" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_JointlyOwnedUtilityPlantDomain" xlink:label="Locator_us-gaap_JointlyOwnedUtilityPlantDomain_9651"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FossilFuelGenerationMember" xlink:label="Locator_exc_FossilFuelGenerationMember_9652"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_JointlyOwnedUtilityPlantDomain_9651" xlink:to="Locator_exc_FossilFuelGenerationMember_9652" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_JointlyOwnedUtilityPlantDomain" xlink:label="Locator_us-gaap_JointlyOwnedUtilityPlantDomain_9653"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ElectricTransmissionMember" xlink:label="Locator_us-gaap_ElectricTransmissionMember_9654"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_JointlyOwnedUtilityPlantDomain_9653" xlink:to="Locator_us-gaap_ElectricTransmissionMember_9654" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_JointlyOwnedUtilityPlantDomain" xlink:label="Locator_us-gaap_JointlyOwnedUtilityPlantDomain_9655"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OtherServiceMember" xlink:label="Locator_exc_OtherServiceMember_9656"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_JointlyOwnedUtilityPlantDomain_9655" xlink:to="Locator_exc_OtherServiceMember_9656" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_JointlyOwnedUtilityPlantInterestsTable" xlink:label="Locator_us-gaap_JointlyOwnedUtilityPlantInterestsTable_9639"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_JointlyOwnedUtilityPlantLocationAxis" xlink:label="Locator_exc_JointlyOwnedUtilityPlantLocationAxis_9640"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_us-gaap_JointlyOwnedUtilityPlantInterestsTable_9639" xlink:to="Locator_exc_JointlyOwnedUtilityPlantLocationAxis_9640" order="2.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_JointlyOwnedUtilityPlantLocationAxis" xlink:label="Locator_exc_JointlyOwnedUtilityPlantLocationAxis_9607"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_JointlyOwnedUtilityPlantLocationDomain" xlink:label="Locator_exc_JointlyOwnedUtilityPlantLocationDomain_9608"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="Locator_exc_JointlyOwnedUtilityPlantLocationAxis_9607" xlink:to="Locator_exc_JointlyOwnedUtilityPlantLocationDomain_9608" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_JointlyOwnedUtilityPlantLocationAxis" xlink:label="Locator_exc_JointlyOwnedUtilityPlantLocationAxis_9657"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_JointlyOwnedUtilityPlantLocationDomain" xlink:label="Locator_exc_JointlyOwnedUtilityPlantLocationDomain_9658"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_exc_JointlyOwnedUtilityPlantLocationAxis_9657" xlink:to="Locator_exc_JointlyOwnedUtilityPlantLocationDomain_9658" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_JointlyOwnedUtilityPlantLocationDomain" xlink:label="Locator_exc_JointlyOwnedUtilityPlantLocationDomain_9659"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_QuadCitiesMember" xlink:label="Locator_exc_QuadCitiesMember_9660"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_JointlyOwnedUtilityPlantLocationDomain_9659" xlink:to="Locator_exc_QuadCitiesMember_9660" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_JointlyOwnedUtilityPlantLocationDomain" xlink:label="Locator_exc_JointlyOwnedUtilityPlantLocationDomain_9661"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PeachBottomMember" xlink:label="Locator_exc_PeachBottomMember_9662"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_JointlyOwnedUtilityPlantLocationDomain_9661" xlink:to="Locator_exc_PeachBottomMember_9662" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_JointlyOwnedUtilityPlantLocationDomain" xlink:label="Locator_exc_JointlyOwnedUtilityPlantLocationDomain_9663"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SalemMember" xlink:label="Locator_exc_SalemMember_9664"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_JointlyOwnedUtilityPlantLocationDomain_9663" xlink:to="Locator_exc_SalemMember_9664" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_JointlyOwnedUtilityPlantLocationDomain" xlink:label="Locator_exc_JointlyOwnedUtilityPlantLocationDomain_9665"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_KeystoneMember" xlink:label="Locator_exc_KeystoneMember_9666"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_JointlyOwnedUtilityPlantLocationDomain_9665" xlink:to="Locator_exc_KeystoneMember_9666" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_JointlyOwnedUtilityPlantLocationDomain" xlink:label="Locator_exc_JointlyOwnedUtilityPlantLocationDomain_9667"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ConemaughMember" xlink:label="Locator_exc_ConemaughMember_9668"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_JointlyOwnedUtilityPlantLocationDomain_9667" xlink:to="Locator_exc_ConemaughMember_9668" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_JointlyOwnedUtilityPlantLocationDomain" xlink:label="Locator_exc_JointlyOwnedUtilityPlantLocationDomain_9669"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_WymanMember" xlink:label="Locator_exc_WymanMember_9670"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_JointlyOwnedUtilityPlantLocationDomain_9669" xlink:to="Locator_exc_WymanMember_9670" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_JointlyOwnedUtilityPlantLocationDomain" xlink:label="Locator_exc_JointlyOwnedUtilityPlantLocationDomain_9671"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PennsylvaniaMember" xlink:label="Locator_exc_PennsylvaniaMember_9672"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_JointlyOwnedUtilityPlantLocationDomain_9671" xlink:to="Locator_exc_PennsylvaniaMember_9672" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_JointlyOwnedUtilityPlantLocationDomain" xlink:label="Locator_exc_JointlyOwnedUtilityPlantLocationDomain_9673"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DelawareAndNewJerseyMember" xlink:label="Locator_exc_DelawareAndNewJerseyMember_9674"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_JointlyOwnedUtilityPlantLocationDomain_9673" xlink:to="Locator_exc_DelawareAndNewJerseyMember_9674" order="7.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_JointlyOwnedUtilityPlantLocationDomain" xlink:label="Locator_exc_JointlyOwnedUtilityPlantLocationDomain_9675"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OtherLocationsMember" xlink:label="Locator_exc_OtherLocationsMember_9676"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_JointlyOwnedUtilityPlantLocationDomain_9675" xlink:to="Locator_exc_OtherLocationsMember_9676" order="8.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_JointlyOwnedUtilityPlantLocationDomain" xlink:label="Locator_exc_JointlyOwnedUtilityPlantLocationDomain_9677"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PaTransmissionLinesMember" xlink:label="Locator_exc_PaTransmissionLinesMember_9678"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_JointlyOwnedUtilityPlantLocationDomain_9677" xlink:to="Locator_exc_PaTransmissionLinesMember_9678" order="9.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_JointlyOwnedUtilityPlantLocationDomain" xlink:label="Locator_exc_JointlyOwnedUtilityPlantLocationDomain_9679"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ConemaughSubstationMember" xlink:label="Locator_exc_ConemaughSubstationMember_9680"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_JointlyOwnedUtilityPlantLocationDomain_9679" xlink:to="Locator_exc_ConemaughSubstationMember_9680" order="10.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_JointlyOwnedUtilityPlantInterestsLineItems" xlink:label="Locator_us-gaap_JointlyOwnedUtilityPlantInterestsLineItems_9681"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ScheduleOfJointlyOwnedUtilityPlantNetOwnershipAbstract" xlink:label="Locator_exc_ScheduleOfJointlyOwnedUtilityPlantNetOwnershipAbstract_9682"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_JointlyOwnedUtilityPlantInterestsLineItems_9681" xlink:to="Locator_exc_ScheduleOfJointlyOwnedUtilityPlantNetOwnershipAbstract_9682" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ScheduleOfJointlyOwnedUtilityPlantNetOwnershipAbstract" xlink:label="Locator_exc_ScheduleOfJointlyOwnedUtilityPlantNetOwnershipAbstract_9683"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_JointlyOwnedElectricUtilityPlantOperator" xlink:label="Locator_exc_JointlyOwnedElectricUtilityPlantOperator_9684"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_ScheduleOfJointlyOwnedUtilityPlantNetOwnershipAbstract_9683" xlink:to="Locator_exc_JointlyOwnedElectricUtilityPlantOperator_9684" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ScheduleOfJointlyOwnedUtilityPlantNetOwnershipAbstract" xlink:label="Locator_exc_ScheduleOfJointlyOwnedUtilityPlantNetOwnershipAbstract_9685"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_JointlyOwnedUtilityPlantProportionateOwnershipShare" xlink:label="Locator_us-gaap_JointlyOwnedUtilityPlantProportionateOwnershipShare_9686"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_ScheduleOfJointlyOwnedUtilityPlantNetOwnershipAbstract_9685" xlink:to="Locator_us-gaap_JointlyOwnedUtilityPlantProportionateOwnershipShare_9686" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ScheduleOfJointlyOwnedUtilityPlantNetOwnershipAbstract" xlink:label="Locator_exc_ScheduleOfJointlyOwnedUtilityPlantNetOwnershipAbstract_9687"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_JointlyOwnedUtilityPlantGrossOwnershipAmountOfPlantInService" xlink:label="Locator_us-gaap_JointlyOwnedUtilityPlantGrossOwnershipAmountOfPlantInService_9688"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_ScheduleOfJointlyOwnedUtilityPlantNetOwnershipAbstract_9687" xlink:to="Locator_us-gaap_JointlyOwnedUtilityPlantGrossOwnershipAmountOfPlantInService_9688" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ScheduleOfJointlyOwnedUtilityPlantNetOwnershipAbstract" xlink:label="Locator_exc_ScheduleOfJointlyOwnedUtilityPlantNetOwnershipAbstract_9689"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_JointlyOwnedUtilityPlantOwnershipAmountOfPlantAccumulatedDepreciation" xlink:label="Locator_us-gaap_JointlyOwnedUtilityPlantOwnershipAmountOfPlantAccumulatedDepreciation_9690"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_ScheduleOfJointlyOwnedUtilityPlantNetOwnershipAbstract_9689" xlink:to="Locator_us-gaap_JointlyOwnedUtilityPlantOwnershipAmountOfPlantAccumulatedDepreciation_9690" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ScheduleOfJointlyOwnedUtilityPlantNetOwnershipAbstract" xlink:label="Locator_exc_ScheduleOfJointlyOwnedUtilityPlantNetOwnershipAbstract_9691"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_JointlyOwnedUtilityPlantOwnershipAmountOfConstructionWorkInProgress" xlink:label="Locator_us-gaap_JointlyOwnedUtilityPlantOwnershipAmountOfConstructionWorkInProgress_9692"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_ScheduleOfJointlyOwnedUtilityPlantNetOwnershipAbstract_9691" xlink:to="Locator_us-gaap_JointlyOwnedUtilityPlantOwnershipAmountOfConstructionWorkInProgress_9692" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_JointlyOwnedUtilityPlantInterestsLineItems" xlink:label="Locator_us-gaap_JointlyOwnedUtilityPlantInterestsLineItems_9693"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_JointlyOwnedUtilityPlantFootnoteAbstract" xlink:label="Locator_exc_JointlyOwnedUtilityPlantFootnoteAbstract_9694"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_JointlyOwnedUtilityPlantInterestsLineItems_9693" xlink:to="Locator_exc_JointlyOwnedUtilityPlantFootnoteAbstract_9694" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_JointlyOwnedUtilityPlantFootnoteAbstract" xlink:label="Locator_exc_JointlyOwnedUtilityPlantFootnoteAbstract_9695"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_MilesOfTransmissionVoltageLines" xlink:label="Locator_exc_MilesOfTransmissionVoltageLines_9696"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_JointlyOwnedUtilityPlantFootnoteAbstract_9695" xlink:to="Locator_exc_MilesOfTransmissionVoltageLines_9696" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_JointlyOwnedUtilityPlantFootnoteAbstract" xlink:label="Locator_exc_JointlyOwnedUtilityPlantFootnoteAbstract_9697"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_VoltageOfTransmissionLines" xlink:label="Locator_exc_VoltageOfTransmissionLines_9698"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_JointlyOwnedUtilityPlantFootnoteAbstract_9697" xlink:to="Locator_exc_VoltageOfTransmissionLines_9698" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_JointlyOwnedUtilityPlantFootnoteAbstract" xlink:label="Locator_exc_JointlyOwnedUtilityPlantFootnoteAbstract_9699"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SubstationKilovolt" xlink:label="Locator_exc_SubstationKilovolt_9700"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_JointlyOwnedUtilityPlantFootnoteAbstract_9699" xlink:to="Locator_exc_SubstationKilovolt_9700" order="5.0" xbrldt:usable="true"/> |
| | </definitionLink> |
| <definitionLink xlink:type="extended" xlink:role="http://exeloncorp.com/role/DisclosurePreferredSecuritiesDetails"> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_9773"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_9774"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_dei_LegalEntityAxis_9773" xlink:to="Locator_dei_EntityDomain_9774" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_9775"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CommonwealthEdisonCoMember" xlink:label="Locator_exc_CommonwealthEdisonCoMember_9776"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_9775" xlink:to="Locator_exc_CommonwealthEdisonCoMember_9776" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_9777"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PecoEnergyCoMember" xlink:label="Locator_exc_PecoEnergyCoMember_9778"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_9777" xlink:to="Locator_exc_PecoEnergyCoMember_9778" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PreferredSecuritiesAdditionalNarrativeInformationLineItems" xlink:label="Locator_exc_PreferredSecuritiesAdditionalNarrativeInformationLineItems_9765"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PreferredSecuritiesAdditionalNarrativeInformationTable" xlink:label="Locator_exc_PreferredSecuritiesAdditionalNarrativeInformationTable_9766"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="Locator_exc_PreferredSecuritiesAdditionalNarrativeInformationLineItems_9765" xlink:to="Locator_exc_PreferredSecuritiesAdditionalNarrativeInformationTable_9766" order="0.5" xbrldt:contextElement="segment" xbrldt:closed="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PreferredSecuritiesAdditionalNarrativeInformationTable" xlink:label="Locator_exc_PreferredSecuritiesAdditionalNarrativeInformationTable_9769"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_9770"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_exc_PreferredSecuritiesAdditionalNarrativeInformationTable_9769" xlink:to="Locator_dei_LegalEntityAxis_9770" order="0.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PreferredSecuritiesAdditionalNarrativeInformationTable" xlink:label="Locator_exc_PreferredSecuritiesAdditionalNarrativeInformationTable_9771"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementClassOfStockAxis" xlink:label="Locator_us-gaap_StatementClassOfStockAxis_9772"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_exc_PreferredSecuritiesAdditionalNarrativeInformationTable_9771" xlink:to="Locator_us-gaap_StatementClassOfStockAxis_9772" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementClassOfStockAxis" xlink:label="Locator_us-gaap_StatementClassOfStockAxis_9751"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ClassOfStockDomain" xlink:label="Locator_us-gaap_ClassOfStockDomain_9752"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="Locator_us-gaap_StatementClassOfStockAxis_9751" xlink:to="Locator_us-gaap_ClassOfStockDomain_9752" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementClassOfStockAxis" xlink:label="Locator_us-gaap_StatementClassOfStockAxis_9789"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ClassOfStockDomain" xlink:label="Locator_us-gaap_ClassOfStockDomain_9790"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_us-gaap_StatementClassOfStockAxis_9789" xlink:to="Locator_us-gaap_ClassOfStockDomain_9790" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ClassOfStockDomain" xlink:label="Locator_us-gaap_ClassOfStockDomain_9791"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PreferredStockMember" xlink:label="Locator_us-gaap_PreferredStockMember_9792"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_ClassOfStockDomain_9791" xlink:to="Locator_us-gaap_PreferredStockMember_9792" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ClassOfStockDomain" xlink:label="Locator_us-gaap_ClassOfStockDomain_9793"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CumulativePreferredStockMember" xlink:label="Locator_us-gaap_CumulativePreferredStockMember_9794"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_ClassOfStockDomain_9793" xlink:to="Locator_us-gaap_CumulativePreferredStockMember_9794" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PreferredSecuritiesAdditionalNarrativeInformationLineItems" xlink:label="Locator_exc_PreferredSecuritiesAdditionalNarrativeInformationLineItems_9803"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PreferredStockSharesAuthorized" xlink:label="Locator_us-gaap_PreferredStockSharesAuthorized_9804"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_PreferredSecuritiesAdditionalNarrativeInformationLineItems_9803" xlink:to="Locator_us-gaap_PreferredStockSharesAuthorized_9804" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_TemporaryEquityLineItems" xlink:label="Locator_us-gaap_TemporaryEquityLineItems_9761"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_TemporaryEquityByClassOfStockTable" xlink:label="Locator_us-gaap_TemporaryEquityByClassOfStockTable_9762"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="Locator_us-gaap_TemporaryEquityLineItems_9761" xlink:to="Locator_us-gaap_TemporaryEquityByClassOfStockTable_9762" order="0.5" xbrldt:contextElement="segment" xbrldt:closed="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_TemporaryEquityByClassOfStockTable" xlink:label="Locator_us-gaap_TemporaryEquityByClassOfStockTable_9767"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_StatementClassOfStockTypeAxis" xlink:label="Locator_exc_StatementClassOfStockTypeAxis_9768"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_us-gaap_TemporaryEquityByClassOfStockTable_9767" xlink:to="Locator_exc_StatementClassOfStockTypeAxis_9768" order="0.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_StatementClassOfStockTypeAxis" xlink:label="Locator_exc_StatementClassOfStockTypeAxis_9749"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ClassOfStockTypeDomain" xlink:label="Locator_exc_ClassOfStockTypeDomain_9750"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="Locator_exc_StatementClassOfStockTypeAxis_9749" xlink:to="Locator_exc_ClassOfStockTypeDomain_9750" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_StatementClassOfStockTypeAxis" xlink:label="Locator_exc_StatementClassOfStockTypeAxis_9779"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ClassOfStockTypeDomain" xlink:label="Locator_exc_ClassOfStockTypeDomain_9780"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_exc_StatementClassOfStockTypeAxis_9779" xlink:to="Locator_exc_ClassOfStockTypeDomain_9780" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ClassOfStockTypeDomain" xlink:label="Locator_exc_ClassOfStockTypeDomain_9781"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_SeriesAPreferredStockMember" xlink:label="Locator_us-gaap_SeriesAPreferredStockMember_9782"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_ClassOfStockTypeDomain_9781" xlink:to="Locator_us-gaap_SeriesAPreferredStockMember_9782" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ClassOfStockTypeDomain" xlink:label="Locator_exc_ClassOfStockTypeDomain_9783"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_SeriesBPreferredStockMember" xlink:label="Locator_us-gaap_SeriesBPreferredStockMember_9784"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_ClassOfStockTypeDomain_9783" xlink:to="Locator_us-gaap_SeriesBPreferredStockMember_9784" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ClassOfStockTypeDomain" xlink:label="Locator_exc_ClassOfStockTypeDomain_9785"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_SeriesCPreferredStockMember" xlink:label="Locator_us-gaap_SeriesCPreferredStockMember_9786"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_ClassOfStockTypeDomain_9785" xlink:to="Locator_us-gaap_SeriesCPreferredStockMember_9786" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ClassOfStockTypeDomain" xlink:label="Locator_exc_ClassOfStockTypeDomain_9787"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_SeriesDPreferredStockMember" xlink:label="Locator_us-gaap_SeriesDPreferredStockMember_9788"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_ClassOfStockTypeDomain_9787" xlink:to="Locator_us-gaap_SeriesDPreferredStockMember_9788" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_TemporaryEquityLineItems" xlink:label="Locator_us-gaap_TemporaryEquityLineItems_9795"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PreferredStockSharesOutstanding" xlink:label="Locator_us-gaap_PreferredStockSharesOutstanding_9796"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_TemporaryEquityLineItems_9795" xlink:to="Locator_us-gaap_PreferredStockSharesOutstanding_9796" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_TemporaryEquityLineItems" xlink:label="Locator_us-gaap_TemporaryEquityLineItems_9797"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PreferredStockValueOutstanding" xlink:label="Locator_us-gaap_PreferredStockValueOutstanding_9798"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_TemporaryEquityLineItems_9797" xlink:to="Locator_us-gaap_PreferredStockValueOutstanding_9798" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_TemporaryEquityLineItems" xlink:label="Locator_us-gaap_TemporaryEquityLineItems_9799"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PreferredStockRedemptionPricePerShare" xlink:label="Locator_us-gaap_PreferredStockRedemptionPricePerShare_9800"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_TemporaryEquityLineItems_9799" xlink:to="Locator_us-gaap_PreferredStockRedemptionPricePerShare_9800" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_TemporaryEquityLineItems" xlink:label="Locator_us-gaap_TemporaryEquityLineItems_9801"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PreferredStockDividendRatePerDollarAmount" xlink:label="Locator_us-gaap_PreferredStockDividendRatePerDollarAmount_9802"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_TemporaryEquityLineItems_9801" xlink:to="Locator_us-gaap_PreferredStockDividendRatePerDollarAmount_9802" order="4.0" xbrldt:usable="true"/> |
| | </definitionLink> |
| <definitionLink xlink:type="extended" xlink:role="http://exeloncorp.com/role/DisclosureStockBasedCompensationPlansDetails"> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_10091"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_10092"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_dei_LegalEntityAxis_10091" xlink:to="Locator_dei_EntityDomain_10092" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_10101"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BusinessServicesCompanyMember" xlink:label="Locator_exc_BusinessServicesCompanyMember_10102"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_10101" xlink:to="Locator_exc_BusinessServicesCompanyMember_10102" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_10093"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ExelonGenerationCoLLCMember" xlink:label="Locator_exc_ExelonGenerationCoLLCMember_10094"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_10093" xlink:to="Locator_exc_ExelonGenerationCoLLCMember_10094" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_10095"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CommonwealthEdisonCoMember" xlink:label="Locator_exc_CommonwealthEdisonCoMember_10096"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_10095" xlink:to="Locator_exc_CommonwealthEdisonCoMember_10096" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_10097"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PecoEnergyCoMember" xlink:label="Locator_exc_PecoEnergyCoMember_10098"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_10097" xlink:to="Locator_exc_PecoEnergyCoMember_10098" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_10099"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BaltimoreGasAndElectricCompanyMember" xlink:label="Locator_exc_BaltimoreGasAndElectricCompanyMember_10100"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_10099" xlink:to="Locator_exc_BaltimoreGasAndElectricCompanyMember_10100" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ShareBasedCompensationPreTaxExpenseLineItems" xlink:label="Locator_exc_ShareBasedCompensationPreTaxExpenseLineItems_9875"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ShareBasedCompensationPreTaxExpenseTable" xlink:label="Locator_exc_ShareBasedCompensationPreTaxExpenseTable_9876"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="Locator_exc_ShareBasedCompensationPreTaxExpenseLineItems_9875" xlink:to="Locator_exc_ShareBasedCompensationPreTaxExpenseTable_9876" order="0.5" xbrldt:contextElement="segment" xbrldt:closed="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ShareBasedCompensationPreTaxExpenseTable" xlink:label="Locator_exc_ShareBasedCompensationPreTaxExpenseTable_10087"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_10088"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_exc_ShareBasedCompensationPreTaxExpenseTable_10087" xlink:to="Locator_dei_LegalEntityAxis_10088" order="0.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ShareBasedCompensationPreTaxExpenseLineItems" xlink:label="Locator_exc_ShareBasedCompensationPreTaxExpenseLineItems_10129"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ShareBasedCompensationComponentsTotalInExpensePreTax" xlink:label="Locator_exc_ShareBasedCompensationComponentsTotalInExpensePreTax_10130"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_ShareBasedCompensationPreTaxExpenseLineItems_10129" xlink:to="Locator_exc_ShareBasedCompensationComponentsTotalInExpensePreTax_10130" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:label="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_9877"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:label="Locator_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_9878"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_9877" xlink:to="Locator_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_9878" order="0.5" xbrldt:contextElement="segment" xbrldt:closed="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:label="Locator_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_10089"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardAwardTypeAndPlanNameAxis" xlink:label="Locator_us-gaap_ScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardAwardTypeAndPlanNameAxis_10090"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_10089" xlink:to="Locator_us-gaap_ScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardAwardTypeAndPlanNameAxis_10090" order="0.0"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardAwardTypeAndPlanNameAxis" xlink:label="Locator_us-gaap_ScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardAwardTypeAndPlanNameAxis_9837"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="Locator_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_9838"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="Locator_us-gaap_ScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardAwardTypeAndPlanNameAxis_9837" xlink:to="Locator_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_9838" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardAwardTypeAndPlanNameAxis" xlink:label="Locator_us-gaap_ScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardAwardTypeAndPlanNameAxis_10103"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="Locator_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_10104"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_us-gaap_ScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardAwardTypeAndPlanNameAxis_10103" xlink:to="Locator_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_10104" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="Locator_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_10105"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StockOptionsMember" xlink:label="Locator_us-gaap_StockOptionsMember_10106"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_10105" xlink:to="Locator_us-gaap_StockOptionsMember_10106" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="Locator_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_10107"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NonvestedStockOptionMember" xlink:label="Locator_exc_NonvestedStockOptionMember_10108"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_10107" xlink:to="Locator_exc_NonvestedStockOptionMember_10108" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="Locator_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_10109"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RestrictedStockMember" xlink:label="Locator_us-gaap_RestrictedStockMember_10110"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_10109" xlink:to="Locator_us-gaap_RestrictedStockMember_10110" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="Locator_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_10111"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PerformanceShareAwardsMember" xlink:label="Locator_exc_PerformanceShareAwardsMember_10112"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_10111" xlink:to="Locator_exc_PerformanceShareAwardsMember_10112" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:label="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_10131"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward" xlink:label="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_10132"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_10131" xlink:to="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_10132" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward" xlink:label="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_10133"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber" xlink:label="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_10134"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_10133" xlink:to="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_10134" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward" xlink:label="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_10135"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod" xlink:label="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod_10136"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_10135" xlink:to="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod_10136" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward" xlink:label="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_10137"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ConvertedOptionsAcquiree" xlink:label="Locator_exc_ConvertedOptionsAcquiree_10138"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_10137" xlink:to="Locator_exc_ConvertedOptionsAcquiree_10138" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward" xlink:label="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_10139"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised" xlink:label="Locator_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_10140"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_10139" xlink:to="Locator_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_10140" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward" xlink:label="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_10141"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableNumber" xlink:label="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableNumber_10142"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_10141" xlink:to="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableNumber_10142" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward" xlink:label="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_10143"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod" xlink:label="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod_10144"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_10143" xlink:to="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod_10144" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward" xlink:label="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_10145"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationsInPeriod" xlink:label="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationsInPeriod_10146"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_10145" xlink:to="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationsInPeriod_10146" order="7.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward" xlink:label="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_10147"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber" xlink:label="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber_10148"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_10147" xlink:to="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber_10148" order="9.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward" xlink:label="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_10149"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice" xlink:label="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_10150"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_10149" xlink:to="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_10150" order="10.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward" xlink:label="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_10151"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice" xlink:label="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice_10152"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_10151" xlink:to="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice_10152" order="11.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward" xlink:label="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_10153"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ConvertedOptionsAcquireeWeightedAverageExercisePirce" xlink:label="Locator_exc_ConvertedOptionsAcquireeWeightedAverageExercisePirce_10154"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_10153" xlink:to="Locator_exc_ConvertedOptionsAcquireeWeightedAverageExercisePirce_10154" order="12.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward" xlink:label="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_10155"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice" xlink:label="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice_10156"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_10155" xlink:to="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice_10156" order="13.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward" xlink:label="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_10157"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageExercisePrice" xlink:label="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageExercisePrice_10158"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_10157" xlink:to="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageExercisePrice_10158" order="14.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward" xlink:label="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_10159"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice" xlink:label="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice_10160"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_10159" xlink:to="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice_10160" order="15.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward" xlink:label="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_10161"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationsInPeriodWeightedAverageExercisePrice" xlink:label="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationsInPeriodWeightedAverageExercisePrice_10162"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_10161" xlink:to="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationsInPeriodWeightedAverageExercisePrice_10162" order="16.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward" xlink:label="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_10163"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice" xlink:label="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice_10164"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_10163" xlink:to="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice_10164" order="18.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward" xlink:label="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_10165"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm1" xlink:label="Locator_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm1_10166"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_10165" xlink:to="Locator_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm1_10166" order="19.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward" xlink:label="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_10167"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm" xlink:label="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm_10168"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_10167" xlink:to="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm_10168" order="20.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward" xlink:label="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_10169"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue" xlink:label="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue_10170"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_10169" xlink:to="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue_10170" order="21.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward" xlink:label="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_10171"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1" xlink:label="Locator_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1_10172"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_10171" xlink:to="Locator_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1_10172" order="22.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:label="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_10173"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward" xlink:label="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_10174"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_10173" xlink:to="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_10174" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward" xlink:label="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_10175"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber" xlink:label="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_10176"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_10175" xlink:to="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_10176" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward" xlink:label="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_10177"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod" xlink:label="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_10178"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_10177" xlink:to="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_10178" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward" xlink:label="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_10179"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_StockBasedCompensationOtherThanOptionsConvertedAcquiree" xlink:label="Locator_exc_StockBasedCompensationOtherThanOptionsConvertedAcquiree_10180"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_10179" xlink:to="Locator_exc_StockBasedCompensationOtherThanOptionsConvertedAcquiree_10180" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward" xlink:label="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_10181"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod" xlink:label="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_10182"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_10181" xlink:to="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_10182" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward" xlink:label="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_10183"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod" xlink:label="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_10184"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_10183" xlink:to="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_10184" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward" xlink:label="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_10185"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodUndistributed" xlink:label="Locator_exc_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodUndistributed_10186"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_10185" xlink:to="Locator_exc_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodUndistributed_10186" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward" xlink:label="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_10187"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue" xlink:label="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_10188"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_10187" xlink:to="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_10188" order="8.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward" xlink:label="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_10189"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue" xlink:label="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_10190"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_10189" xlink:to="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_10190" order="9.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward" xlink:label="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_10191"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue" xlink:label="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_10192"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_10191" xlink:to="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_10192" order="10.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward" xlink:label="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_10193"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriodWeightedAverageGrantDateFairValue" xlink:label="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriodWeightedAverageGrantDateFairValue_10194"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_10193" xlink:to="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriodWeightedAverageGrantDateFairValue_10194" order="11.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward" xlink:label="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_10195"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodUndistributedWeightedAverageExercisePrice" xlink:label="Locator_exc_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodUndistributedWeightedAverageExercisePrice_10196"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_10195" xlink:to="Locator_exc_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodUndistributedWeightedAverageExercisePrice_10196" order="12.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward" xlink:label="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_10197"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ExpectedPayoutMinimum" xlink:label="Locator_exc_ExpectedPayoutMinimum_10198"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_10197" xlink:to="Locator_exc_ExpectedPayoutMinimum_10198" order="14.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward" xlink:label="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_10199"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ExpectedPayoutMaximum" xlink:label="Locator_exc_ExpectedPayoutMaximum_10200"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_10199" xlink:to="Locator_exc_ExpectedPayoutMaximum_10200" order="15.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:label="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_10201"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardFootnotesToTableAbstract" xlink:label="Locator_exc_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardFootnotesToTableAbstract_10202"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_10201" xlink:to="Locator_exc_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardFootnotesToTableAbstract_10202" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardFootnotesToTableAbstract" xlink:label="Locator_exc_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardFootnotesToTableAbstract_10203"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FullyVestedStockBasedCompensationIssuedToRetirementEligibleEmployees" xlink:label="Locator_exc_FullyVestedStockBasedCompensationIssuedToRetirementEligibleEmployees_10204"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardFootnotesToTableAbstract_10203" xlink:to="Locator_exc_FullyVestedStockBasedCompensationIssuedToRetirementEligibleEmployees_10204" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardFootnotesToTableAbstract" xlink:label="Locator_exc_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardFootnotesToTableAbstract_10205"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_StockBasedCompensationIssuedToRetirementEligibleEmployeesThatVestedImmediatelyOnDateOfGrant" xlink:label="Locator_exc_StockBasedCompensationIssuedToRetirementEligibleEmployeesThatVestedImmediatelyOnDateOfGrant_10206"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardFootnotesToTableAbstract_10205" xlink:to="Locator_exc_StockBasedCompensationIssuedToRetirementEligibleEmployeesThatVestedImmediatelyOnDateOfGrant_10206" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:label="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_10207"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ShareBasedCompensationAcquisitionArrangementAbstract" xlink:label="Locator_exc_ShareBasedCompensationAcquisitionArrangementAbstract_10208"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_10207" xlink:to="Locator_exc_ShareBasedCompensationAcquisitionArrangementAbstract_10208" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ShareBasedCompensationAcquisitionArrangementAbstract" xlink:label="Locator_exc_ShareBasedCompensationAcquisitionArrangementAbstract_10209"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SharedBasedCompensationFairValueAcquisition" xlink:label="Locator_exc_SharedBasedCompensationFairValueAcquisition_10210"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_ShareBasedCompensationAcquisitionArrangementAbstract_10209" xlink:to="Locator_exc_SharedBasedCompensationFairValueAcquisition_10210" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ShareBasedCompensationAcquisitionArrangementAbstract" xlink:label="Locator_exc_ShareBasedCompensationAcquisitionArrangementAbstract_10211"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_StockBasedCompensationConvertedAcquiree" xlink:label="Locator_exc_StockBasedCompensationConvertedAcquiree_10212"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_ShareBasedCompensationAcquisitionArrangementAbstract_10211" xlink:to="Locator_exc_StockBasedCompensationConvertedAcquiree_10212" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ShareBasedCompensationAcquisitionArrangementAbstract" xlink:label="Locator_exc_ShareBasedCompensationAcquisitionArrangementAbstract_10213"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_StockBasedCompensationConvertedAcquirerShares" xlink:label="Locator_exc_StockBasedCompensationConvertedAcquirerShares_10214"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_ShareBasedCompensationAcquisitionArrangementAbstract_10213" xlink:to="Locator_exc_StockBasedCompensationConvertedAcquirerShares_10214" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ShareBasedCompensationAcquisitionArrangementAbstract" xlink:label="Locator_exc_ShareBasedCompensationAcquisitionArrangementAbstract_10215"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_StockBasedCompensationAcquisitionValue" xlink:label="Locator_exc_StockBasedCompensationAcquisitionValue_10216"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_ShareBasedCompensationAcquisitionArrangementAbstract_10215" xlink:to="Locator_exc_StockBasedCompensationAcquisitionValue_10216" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ShareBasedCompensationAcquisitionArrangementAbstract" xlink:label="Locator_exc_ShareBasedCompensationAcquisitionArrangementAbstract_10217"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NoSaleRestrictedStockConvertedShares" xlink:label="Locator_exc_NoSaleRestrictedStockConvertedShares_10218"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_ShareBasedCompensationAcquisitionArrangementAbstract_10217" xlink:to="Locator_exc_NoSaleRestrictedStockConvertedShares_10218" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ShareBasedCompensationAcquisitionArrangementAbstract" xlink:label="Locator_exc_ShareBasedCompensationAcquisitionArrangementAbstract_10219"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NoSaleRestrictedStockConvertedValue" xlink:label="Locator_exc_NoSaleRestrictedStockConvertedValue_10220"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_ShareBasedCompensationAcquisitionArrangementAbstract_10219" xlink:to="Locator_exc_NoSaleRestrictedStockConvertedValue_10220" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementLineItems" xlink:label="Locator_us-gaap_StatementLineItems_9855"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CommonStockNarrativeInformationTable" xlink:label="Locator_exc_CommonStockNarrativeInformationTable_9856"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="Locator_us-gaap_StatementLineItems_9855" xlink:to="Locator_exc_CommonStockNarrativeInformationTable_9856" order="0.5" xbrldt:contextElement="segment" xbrldt:closed="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CommonStockNarrativeInformationTable" xlink:label="Locator_exc_CommonStockNarrativeInformationTable_10085"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_10086"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_exc_CommonStockNarrativeInformationTable_10085" xlink:to="Locator_dei_LegalEntityAxis_10086" order="0.0"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementLineItems" xlink:label="Locator_us-gaap_StatementLineItems_10113"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CommonStockNumberOfSharesParValueAndOtherDisclosuresAbstract" xlink:label="Locator_us-gaap_CommonStockNumberOfSharesParValueAndOtherDisclosuresAbstract_10114"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_StatementLineItems_10113" xlink:to="Locator_us-gaap_CommonStockNumberOfSharesParValueAndOtherDisclosuresAbstract_10114" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CommonStockNumberOfSharesParValueAndOtherDisclosuresAbstract" xlink:label="Locator_us-gaap_CommonStockNumberOfSharesParValueAndOtherDisclosuresAbstract_10115"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CommonStockSharesAuthorized" xlink:label="Locator_us-gaap_CommonStockSharesAuthorized_10116"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_CommonStockNumberOfSharesParValueAndOtherDisclosuresAbstract_10115" xlink:to="Locator_us-gaap_CommonStockSharesAuthorized_10116" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CommonStockNumberOfSharesParValueAndOtherDisclosuresAbstract" xlink:label="Locator_us-gaap_CommonStockNumberOfSharesParValueAndOtherDisclosuresAbstract_10117"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CommonStockSharesOutstanding" xlink:label="Locator_us-gaap_CommonStockSharesOutstanding_10118"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_CommonStockNumberOfSharesParValueAndOtherDisclosuresAbstract_10117" xlink:to="Locator_us-gaap_CommonStockSharesOutstanding_10118" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CommonStockNumberOfSharesParValueAndOtherDisclosuresAbstract" xlink:label="Locator_us-gaap_CommonStockNumberOfSharesParValueAndOtherDisclosuresAbstract_10119"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CommonStockParOrStatedValuePerShare" xlink:label="Locator_us-gaap_CommonStockParOrStatedValuePerShare_10120"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_CommonStockNumberOfSharesParValueAndOtherDisclosuresAbstract_10119" xlink:to="Locator_us-gaap_CommonStockParOrStatedValuePerShare_10120" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CommonStockNumberOfSharesParValueAndOtherDisclosuresAbstract" xlink:label="Locator_us-gaap_CommonStockNumberOfSharesParValueAndOtherDisclosuresAbstract_10121"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CommonStockParSharesAuthorized" xlink:label="Locator_exc_CommonStockParSharesAuthorized_10122"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_CommonStockNumberOfSharesParValueAndOtherDisclosuresAbstract_10121" xlink:to="Locator_exc_CommonStockParSharesAuthorized_10122" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CommonStockNumberOfSharesParValueAndOtherDisclosuresAbstract" xlink:label="Locator_us-gaap_CommonStockNumberOfSharesParValueAndOtherDisclosuresAbstract_10123"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CommonStockParSharesOutstanding" xlink:label="Locator_exc_CommonStockParSharesOutstanding_10124"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_CommonStockNumberOfSharesParValueAndOtherDisclosuresAbstract_10123" xlink:to="Locator_exc_CommonStockParSharesOutstanding_10124" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CommonStockNumberOfSharesParValueAndOtherDisclosuresAbstract" xlink:label="Locator_us-gaap_CommonStockNumberOfSharesParValueAndOtherDisclosuresAbstract_10125"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NumberOfWarrantsOutstanding" xlink:label="Locator_exc_NumberOfWarrantsOutstanding_10126"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_CommonStockNumberOfSharesParValueAndOtherDisclosuresAbstract_10125" xlink:to="Locator_exc_NumberOfWarrantsOutstanding_10126" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CommonStockNumberOfSharesParValueAndOtherDisclosuresAbstract" xlink:label="Locator_us-gaap_CommonStockNumberOfSharesParValueAndOtherDisclosuresAbstract_10127"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CommonStockSharesReservedForWarrantConversion" xlink:label="Locator_exc_CommonStockSharesReservedForWarrantConversion_10128"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_CommonStockNumberOfSharesParValueAndOtherDisclosuresAbstract_10127" xlink:to="Locator_exc_CommonStockSharesReservedForWarrantConversion_10128" order="7.0" xbrldt:usable="true"/> |
| | </definitionLink> |
| <definitionLink xlink:type="extended" xlink:role="http://exeloncorp.com/role/DisclosureRelatedPartyTransactionsDetails"> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_10329"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_10330"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_dei_LegalEntityAxis_10329" xlink:to="Locator_dei_EntityDomain_10330" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_10331"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ExelonGenerationCoLLCMember" xlink:label="Locator_exc_ExelonGenerationCoLLCMember_10332"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_10331" xlink:to="Locator_exc_ExelonGenerationCoLLCMember_10332" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_10333"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CommonwealthEdisonCoMember" xlink:label="Locator_exc_CommonwealthEdisonCoMember_10334"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_10333" xlink:to="Locator_exc_CommonwealthEdisonCoMember_10334" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_10335"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PecoEnergyCoMember" xlink:label="Locator_exc_PecoEnergyCoMember_10336"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_10335" xlink:to="Locator_exc_PecoEnergyCoMember_10336" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_10337"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BaltimoreGasAndElectricCompanyMember" xlink:label="Locator_exc_BaltimoreGasAndElectricCompanyMember_10338"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_10337" xlink:to="Locator_exc_BaltimoreGasAndElectricCompanyMember_10338" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:label="Locator_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_10327"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:label="Locator_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_10328"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_10327" xlink:to="Locator_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_10328" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:label="Locator_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_10255"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RelatedPartyDomain" xlink:label="Locator_us-gaap_RelatedPartyDomain_10256"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="Locator_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_10255" xlink:to="Locator_us-gaap_RelatedPartyDomain_10256" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:label="Locator_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_10339"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RelatedPartyDomain" xlink:label="Locator_us-gaap_RelatedPartyDomain_10340"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_10339" xlink:to="Locator_us-gaap_RelatedPartyDomain_10340" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RelatedPartyDomain" xlink:label="Locator_us-gaap_RelatedPartyDomain_10341"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ExelonBusinessServicesCoAffiliateMember" xlink:label="Locator_exc_ExelonBusinessServicesCoAffiliateMember_10342"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RelatedPartyDomain_10341" xlink:to="Locator_exc_ExelonBusinessServicesCoAffiliateMember_10342" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RelatedPartyDomain" xlink:label="Locator_us-gaap_RelatedPartyDomain_10343"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CommonwealthEdisonCoAffiliateMember" xlink:label="Locator_exc_CommonwealthEdisonCoAffiliateMember_10344"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RelatedPartyDomain_10343" xlink:to="Locator_exc_CommonwealthEdisonCoAffiliateMember_10344" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RelatedPartyDomain" xlink:label="Locator_us-gaap_RelatedPartyDomain_10345"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ComedFinancingTwoAffiliateMember" xlink:label="Locator_exc_ComedFinancingTwoAffiliateMember_10346"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RelatedPartyDomain_10345" xlink:to="Locator_exc_ComedFinancingTwoAffiliateMember_10346" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RelatedPartyDomain" xlink:label="Locator_us-gaap_RelatedPartyDomain_10347"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ComedFinancingThreeAffiliateMember" xlink:label="Locator_exc_ComedFinancingThreeAffiliateMember_10348"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RelatedPartyDomain_10347" xlink:to="Locator_exc_ComedFinancingThreeAffiliateMember_10348" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RelatedPartyDomain" xlink:label="Locator_us-gaap_RelatedPartyDomain_10349"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ComedFundingAffiliateMember" xlink:label="Locator_exc_ComedFundingAffiliateMember_10350"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RelatedPartyDomain_10349" xlink:to="Locator_exc_ComedFundingAffiliateMember_10350" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RelatedPartyDomain" xlink:label="Locator_us-gaap_RelatedPartyDomain_10351"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ConemaughFuelsLlcAffiliateMember" xlink:label="Locator_exc_ConemaughFuelsLlcAffiliateMember_10352"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RelatedPartyDomain_10351" xlink:to="Locator_exc_ConemaughFuelsLlcAffiliateMember_10352" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RelatedPartyDomain" xlink:label="Locator_us-gaap_RelatedPartyDomain_10353"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ComedTransitionFundingTrustAffiliateMember" xlink:label="Locator_exc_ComedTransitionFundingTrustAffiliateMember_10354"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RelatedPartyDomain_10353" xlink:to="Locator_exc_ComedTransitionFundingTrustAffiliateMember_10354" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RelatedPartyDomain" xlink:label="Locator_us-gaap_RelatedPartyDomain_10355"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ExelonCorporationAffiliateMember" xlink:label="Locator_exc_ExelonCorporationAffiliateMember_10356"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RelatedPartyDomain_10355" xlink:to="Locator_exc_ExelonCorporationAffiliateMember_10356" order="7.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RelatedPartyDomain" xlink:label="Locator_us-gaap_RelatedPartyDomain_10357"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ExelonGenerationCoLlcAffiliateMember" xlink:label="Locator_exc_ExelonGenerationCoLlcAffiliateMember_10358"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RelatedPartyDomain_10357" xlink:to="Locator_exc_ExelonGenerationCoLlcAffiliateMember_10358" order="8.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RelatedPartyDomain" xlink:label="Locator_us-gaap_RelatedPartyDomain_10359"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_KeystoneFuelsLlcAffiliateMember" xlink:label="Locator_exc_KeystoneFuelsLlcAffiliateMember_10360"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RelatedPartyDomain_10359" xlink:to="Locator_exc_KeystoneFuelsLlcAffiliateMember_10360" order="9.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RelatedPartyDomain" xlink:label="Locator_us-gaap_RelatedPartyDomain_10361"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NustartEnergyDevelopmentLlcAffiliateMember" xlink:label="Locator_exc_NustartEnergyDevelopmentLlcAffiliateMember_10362"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RelatedPartyDomain_10361" xlink:to="Locator_exc_NustartEnergyDevelopmentLlcAffiliateMember_10362" order="10.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RelatedPartyDomain" xlink:label="Locator_us-gaap_RelatedPartyDomain_10363"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OtherAffiliateMember" xlink:label="Locator_exc_OtherAffiliateMember_10364"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RelatedPartyDomain_10363" xlink:to="Locator_exc_OtherAffiliateMember_10364" order="11.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RelatedPartyDomain" xlink:label="Locator_us-gaap_RelatedPartyDomain_10365"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PecoEnergyCoAffiliateMember" xlink:label="Locator_exc_PecoEnergyCoAffiliateMember_10366"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RelatedPartyDomain_10365" xlink:to="Locator_exc_PecoEnergyCoAffiliateMember_10366" order="12.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RelatedPartyDomain" xlink:label="Locator_us-gaap_RelatedPartyDomain_10367"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PecoEnergyCapitalCorporationAffiliateMember" xlink:label="Locator_exc_PecoEnergyCapitalCorporationAffiliateMember_10368"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RelatedPartyDomain_10367" xlink:to="Locator_exc_PecoEnergyCapitalCorporationAffiliateMember_10368" order="13.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RelatedPartyDomain" xlink:label="Locator_us-gaap_RelatedPartyDomain_10369"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PecoTrustThreeAffiliateMember" xlink:label="Locator_exc_PecoTrustThreeAffiliateMember_10370"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RelatedPartyDomain_10369" xlink:to="Locator_exc_PecoTrustThreeAffiliateMember_10370" order="14.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RelatedPartyDomain" xlink:label="Locator_us-gaap_RelatedPartyDomain_10371"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PecoTrustFourAffiliateMember" xlink:label="Locator_exc_PecoTrustFourAffiliateMember_10372"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RelatedPartyDomain_10371" xlink:to="Locator_exc_PecoTrustFourAffiliateMember_10372" order="15.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RelatedPartyDomain" xlink:label="Locator_us-gaap_RelatedPartyDomain_10373"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PecoEnergyTransitionTrustAffiliateMember" xlink:label="Locator_exc_PecoEnergyTransitionTrustAffiliateMember_10374"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RelatedPartyDomain_10373" xlink:to="Locator_exc_PecoEnergyTransitionTrustAffiliateMember_10374" order="16.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RelatedPartyDomain" xlink:label="Locator_us-gaap_RelatedPartyDomain_10375"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BaltimoreGasAndElectricCompanyAffiliateMember" xlink:label="Locator_exc_BaltimoreGasAndElectricCompanyAffiliateMember_10376"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RelatedPartyDomain_10375" xlink:to="Locator_exc_BaltimoreGasAndElectricCompanyAffiliateMember_10376" order="17.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:label="Locator_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_10325"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_10326"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_10325" xlink:to="Locator_dei_LegalEntityAxis_10326" order="0.0"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RelatedPartyTransactionLineItems" xlink:label="Locator_us-gaap_RelatedPartyTransactionLineItems_10377"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RelatedPartyIncomeStatementActivityAbstract" xlink:label="Locator_exc_RelatedPartyIncomeStatementActivityAbstract_10378"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RelatedPartyTransactionLineItems_10377" xlink:to="Locator_exc_RelatedPartyIncomeStatementActivityAbstract_10378" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RelatedPartyIncomeStatementActivityAbstract" xlink:label="Locator_exc_RelatedPartyIncomeStatementActivityAbstract_10379"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RelatedPartyTransactionRevenuesFromTransactionsWithRelatedParty" xlink:label="Locator_us-gaap_RelatedPartyTransactionRevenuesFromTransactionsWithRelatedParty_10380"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_RelatedPartyIncomeStatementActivityAbstract_10379" xlink:to="Locator_us-gaap_RelatedPartyTransactionRevenuesFromTransactionsWithRelatedParty_10380" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RelatedPartyIncomeStatementActivityAbstract" xlink:label="Locator_exc_RelatedPartyIncomeStatementActivityAbstract_10381"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RelatedPartyTransactionUtilitiesOperatingExpenseFuelUsedTotal" xlink:label="Locator_exc_RelatedPartyTransactionUtilitiesOperatingExpenseFuelUsedTotal_10382"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_RelatedPartyIncomeStatementActivityAbstract_10381" xlink:to="Locator_exc_RelatedPartyTransactionUtilitiesOperatingExpenseFuelUsedTotal_10382" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RelatedPartyIncomeStatementActivityAbstract" xlink:label="Locator_exc_RelatedPartyIncomeStatementActivityAbstract_10383"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RelatedPartyTransactionCharitableContribution" xlink:label="Locator_exc_RelatedPartyTransactionCharitableContribution_10384"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_RelatedPartyIncomeStatementActivityAbstract_10383" xlink:to="Locator_exc_RelatedPartyTransactionCharitableContribution_10384" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RelatedPartyIncomeStatementActivityAbstract" xlink:label="Locator_exc_RelatedPartyIncomeStatementActivityAbstract_10385"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CostOfPurchasedPowerAffiliate" xlink:label="Locator_exc_CostOfPurchasedPowerAffiliate_10386"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_RelatedPartyIncomeStatementActivityAbstract_10385" xlink:to="Locator_exc_CostOfPurchasedPowerAffiliate_10386" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RelatedPartyIncomeStatementActivityAbstract" xlink:label="Locator_exc_RelatedPartyIncomeStatementActivityAbstract_10387"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty" xlink:label="Locator_us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty_10388"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_RelatedPartyIncomeStatementActivityAbstract_10387" xlink:to="Locator_us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty_10388" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RelatedPartyIncomeStatementActivityAbstract" xlink:label="Locator_exc_RelatedPartyIncomeStatementActivityAbstract_10389"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_InterestExpenseToAffiliatesNet" xlink:label="Locator_exc_InterestExpenseToAffiliatesNet_10390"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_RelatedPartyIncomeStatementActivityAbstract_10389" xlink:to="Locator_exc_InterestExpenseToAffiliatesNet_10390" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RelatedPartyIncomeStatementActivityAbstract" xlink:label="Locator_exc_RelatedPartyIncomeStatementActivityAbstract_10391"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_IncomeLossFromEquityMethodInvestments" xlink:label="Locator_us-gaap_IncomeLossFromEquityMethodInvestments_10392"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_RelatedPartyIncomeStatementActivityAbstract_10391" xlink:to="Locator_us-gaap_IncomeLossFromEquityMethodInvestments_10392" order="7.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RelatedPartyIncomeStatementActivityAbstract" xlink:label="Locator_exc_RelatedPartyIncomeStatementActivityAbstract_10393"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RelatedPartyTransactionCapitalizedCostsSupportServices" xlink:label="Locator_exc_RelatedPartyTransactionCapitalizedCostsSupportServices_10394"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_RelatedPartyIncomeStatementActivityAbstract_10393" xlink:to="Locator_exc_RelatedPartyTransactionCapitalizedCostsSupportServices_10394" order="8.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RelatedPartyIncomeStatementActivityAbstract" xlink:label="Locator_exc_RelatedPartyIncomeStatementActivityAbstract_10395"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PaymentsOfDistributionsToAffiliates" xlink:label="Locator_us-gaap_PaymentsOfDistributionsToAffiliates_10396"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_RelatedPartyIncomeStatementActivityAbstract_10395" xlink:to="Locator_us-gaap_PaymentsOfDistributionsToAffiliates_10396" order="9.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RelatedPartyIncomeStatementActivityAbstract" xlink:label="Locator_exc_RelatedPartyIncomeStatementActivityAbstract_10397"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PaymentsOfDividendsCommonStock" xlink:label="Locator_us-gaap_PaymentsOfDividendsCommonStock_10398"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_RelatedPartyIncomeStatementActivityAbstract_10397" xlink:to="Locator_us-gaap_PaymentsOfDividendsCommonStock_10398" order="10.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RelatedPartyIncomeStatementActivityAbstract" xlink:label="Locator_exc_RelatedPartyIncomeStatementActivityAbstract_10399"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ProceedsFromContributionsFromParent" xlink:label="Locator_us-gaap_ProceedsFromContributionsFromParent_10400"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_RelatedPartyIncomeStatementActivityAbstract_10399" xlink:to="Locator_us-gaap_ProceedsFromContributionsFromParent_10400" order="11.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RelatedPartyIncomeStatementActivityAbstract" xlink:label="Locator_exc_RelatedPartyIncomeStatementActivityAbstract_10401"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_IntercompanyNonCashAllocationOfTaxBenefit" xlink:label="Locator_exc_IntercompanyNonCashAllocationOfTaxBenefit_10402"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_RelatedPartyIncomeStatementActivityAbstract_10401" xlink:to="Locator_exc_IntercompanyNonCashAllocationOfTaxBenefit_10402" order="12.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RelatedPartyIncomeStatementActivityAbstract" xlink:label="Locator_exc_RelatedPartyIncomeStatementActivityAbstract_10403"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ProceedsFromContributionsFromAffiliates" xlink:label="Locator_us-gaap_ProceedsFromContributionsFromAffiliates_10404"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_RelatedPartyIncomeStatementActivityAbstract_10403" xlink:to="Locator_us-gaap_ProceedsFromContributionsFromAffiliates_10404" order="13.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RelatedPartyIncomeStatementActivityAbstract" xlink:label="Locator_exc_RelatedPartyIncomeStatementActivityAbstract_10405"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RepaymentOfNotesReceivableFromRelatedParties" xlink:label="Locator_us-gaap_RepaymentOfNotesReceivableFromRelatedParties_10406"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_RelatedPartyIncomeStatementActivityAbstract_10405" xlink:to="Locator_us-gaap_RepaymentOfNotesReceivableFromRelatedParties_10406" order="14.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RelatedPartyTransactionLineItems" xlink:label="Locator_us-gaap_RelatedPartyTransactionLineItems_10407"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RelatedPartyBalanceSheetAbstract" xlink:label="Locator_exc_RelatedPartyBalanceSheetAbstract_10408"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RelatedPartyTransactionLineItems_10407" xlink:to="Locator_exc_RelatedPartyBalanceSheetAbstract_10408" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RelatedPartyBalanceSheetAbstract" xlink:label="Locator_exc_RelatedPartyBalanceSheetAbstract_10409"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AffiliateDerivativeAssetsCurrent" xlink:label="Locator_exc_AffiliateDerivativeAssetsCurrent_10410"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_RelatedPartyBalanceSheetAbstract_10409" xlink:to="Locator_exc_AffiliateDerivativeAssetsCurrent_10410" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RelatedPartyBalanceSheetAbstract" xlink:label="Locator_exc_RelatedPartyBalanceSheetAbstract_10411"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DueFromAffiliateCurrent" xlink:label="Locator_us-gaap_DueFromAffiliateCurrent_10412"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_RelatedPartyBalanceSheetAbstract_10411" xlink:to="Locator_us-gaap_DueFromAffiliateCurrent_10412" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RelatedPartyBalanceSheetAbstract" xlink:label="Locator_exc_RelatedPartyBalanceSheetAbstract_10413"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DueFromAffiliateNoncurrent" xlink:label="Locator_us-gaap_DueFromAffiliateNoncurrent_10414"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_RelatedPartyBalanceSheetAbstract_10413" xlink:to="Locator_us-gaap_DueFromAffiliateNoncurrent_10414" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RelatedPartyBalanceSheetAbstract" xlink:label="Locator_exc_RelatedPartyBalanceSheetAbstract_10415"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AffiliateDerivativeAssetsNoncurrent" xlink:label="Locator_exc_AffiliateDerivativeAssetsNoncurrent_10416"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_RelatedPartyBalanceSheetAbstract_10415" xlink:to="Locator_exc_AffiliateDerivativeAssetsNoncurrent_10416" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RelatedPartyBalanceSheetAbstract" xlink:label="Locator_exc_RelatedPartyBalanceSheetAbstract_10417"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RelatedPartyTransactionPrepaidVoluntaryEmployeeBeneficiaryAssociationTrust" xlink:label="Locator_exc_RelatedPartyTransactionPrepaidVoluntaryEmployeeBeneficiaryAssociationTrust_10418"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_RelatedPartyBalanceSheetAbstract_10417" xlink:to="Locator_exc_RelatedPartyTransactionPrepaidVoluntaryEmployeeBeneficiaryAssociationTrust_10418" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RelatedPartyBalanceSheetAbstract" xlink:label="Locator_exc_RelatedPartyBalanceSheetAbstract_10419"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures" xlink:label="Locator_us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures_10420"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_RelatedPartyBalanceSheetAbstract_10419" xlink:to="Locator_us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures_10420" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RelatedPartyBalanceSheetAbstract" xlink:label="Locator_exc_RelatedPartyBalanceSheetAbstract_10421"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DueToAffiliateCurrent" xlink:label="Locator_us-gaap_DueToAffiliateCurrent_10422"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_RelatedPartyBalanceSheetAbstract_10421" xlink:to="Locator_us-gaap_DueToAffiliateCurrent_10422" order="7.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RelatedPartyBalanceSheetAbstract" xlink:label="Locator_exc_RelatedPartyBalanceSheetAbstract_10423"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AffiliateDerivativeLiabilitiesCurrent" xlink:label="Locator_exc_AffiliateDerivativeLiabilitiesCurrent_10424"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_RelatedPartyBalanceSheetAbstract_10423" xlink:to="Locator_exc_AffiliateDerivativeLiabilitiesCurrent_10424" order="8.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RelatedPartyBalanceSheetAbstract" xlink:label="Locator_exc_RelatedPartyBalanceSheetAbstract_10425"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AffiliateDerivativeLiabilitiesNoncurrent" xlink:label="Locator_exc_AffiliateDerivativeLiabilitiesNoncurrent_10426"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_RelatedPartyBalanceSheetAbstract_10425" xlink:to="Locator_exc_AffiliateDerivativeLiabilitiesNoncurrent_10426" order="9.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RelatedPartyBalanceSheetAbstract" xlink:label="Locator_exc_RelatedPartyBalanceSheetAbstract_10427"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_LongTermDebtToFinancingTrustsFairValueDisclosure" xlink:label="Locator_exc_LongTermDebtToFinancingTrustsFairValueDisclosure_10428"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_RelatedPartyBalanceSheetAbstract_10427" xlink:to="Locator_exc_LongTermDebtToFinancingTrustsFairValueDisclosure_10428" order="10.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RelatedPartyBalanceSheetAbstract" xlink:label="Locator_exc_RelatedPartyBalanceSheetAbstract_10429"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DueToAffiliateNoncurrent" xlink:label="Locator_us-gaap_DueToAffiliateNoncurrent_10430"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_RelatedPartyBalanceSheetAbstract_10429" xlink:to="Locator_us-gaap_DueToAffiliateNoncurrent_10430" order="11.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RelatedPartyBalanceSheetAbstract" xlink:label="Locator_exc_RelatedPartyBalanceSheetAbstract_10431"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DueFromOfficersOrStockholdersNoncurrent" xlink:label="Locator_us-gaap_DueFromOfficersOrStockholdersNoncurrent_10432"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_RelatedPartyBalanceSheetAbstract_10431" xlink:to="Locator_us-gaap_DueFromOfficersOrStockholdersNoncurrent_10432" order="12.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RelatedPartyTransactionLineItems" xlink:label="Locator_us-gaap_RelatedPartyTransactionLineItems_10433"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RelatedPartyTransactionFootnoteInformationAbstract" xlink:label="Locator_exc_RelatedPartyTransactionFootnoteInformationAbstract_10434"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RelatedPartyTransactionLineItems_10433" xlink:to="Locator_exc_RelatedPartyTransactionFootnoteInformationAbstract_10434" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RelatedPartyTransactionFootnoteInformationAbstract" xlink:label="Locator_exc_RelatedPartyTransactionFootnoteInformationAbstract_10435"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AccountsPayableRelatedPartiesCurrentAndNoncurrent" xlink:label="Locator_us-gaap_AccountsPayableRelatedPartiesCurrentAndNoncurrent_10436"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_RelatedPartyTransactionFootnoteInformationAbstract_10435" xlink:to="Locator_us-gaap_AccountsPayableRelatedPartiesCurrentAndNoncurrent_10436" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RelatedPartyTransactionFootnoteInformationAbstract" xlink:label="Locator_exc_RelatedPartyTransactionFootnoteInformationAbstract_10437"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DueFromAffiliateSwapContractCurrent" xlink:label="Locator_exc_DueFromAffiliateSwapContractCurrent_10438"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_RelatedPartyTransactionFootnoteInformationAbstract_10437" xlink:to="Locator_exc_DueFromAffiliateSwapContractCurrent_10438" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RelatedPartyTransactionFootnoteInformationAbstract" xlink:label="Locator_exc_RelatedPartyTransactionFootnoteInformationAbstract_10439"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AccountsReceivableRelatedParties" xlink:label="Locator_us-gaap_AccountsReceivableRelatedParties_10440"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_RelatedPartyTransactionFootnoteInformationAbstract_10439" xlink:to="Locator_us-gaap_AccountsReceivableRelatedParties_10440" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RelatedPartyTransactionFootnoteInformationAbstract" xlink:label="Locator_exc_RelatedPartyTransactionFootnoteInformationAbstract_10441"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DueToAffiliateSwapContractCurrent" xlink:label="Locator_exc_DueToAffiliateSwapContractCurrent_10442"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_RelatedPartyTransactionFootnoteInformationAbstract_10441" xlink:to="Locator_exc_DueToAffiliateSwapContractCurrent_10442" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RelatedPartyTransactionLineItems" xlink:label="Locator_us-gaap_RelatedPartyTransactionLineItems_10263"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:label="Locator_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_10264"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="Locator_us-gaap_RelatedPartyTransactionLineItems_10263" xlink:to="Locator_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_10264" order="0.5" xbrldt:contextElement="segment" xbrldt:closed="true"/> |
| | </definitionLink> |
| <definitionLink xlink:type="extended" xlink:role="http://exeloncorp.com/role/QuarterlyDataDetails"> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_10523"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_10524"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_dei_LegalEntityAxis_10523" xlink:to="Locator_dei_EntityDomain_10524" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_10525"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ExelonGenerationCoLLCMember" xlink:label="Locator_exc_ExelonGenerationCoLLCMember_10526"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_10525" xlink:to="Locator_exc_ExelonGenerationCoLLCMember_10526" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_10527"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CommonwealthEdisonCoMember" xlink:label="Locator_exc_CommonwealthEdisonCoMember_10528"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_10527" xlink:to="Locator_exc_CommonwealthEdisonCoMember_10528" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_10529"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PecoEnergyCoMember" xlink:label="Locator_exc_PecoEnergyCoMember_10530"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_10529" xlink:to="Locator_exc_PecoEnergyCoMember_10530" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_10531"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BaltimoreGasAndElectricCompanyMember" xlink:label="Locator_exc_BaltimoreGasAndElectricCompanyMember_10532"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_10531" xlink:to="Locator_exc_BaltimoreGasAndElectricCompanyMember_10532" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SelectedQuarterlyFinancialInformationLineItems" xlink:label="Locator_exc_SelectedQuarterlyFinancialInformationLineItems_10511"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SelectedQuarterlyFinancialInformationTable" xlink:label="Locator_exc_SelectedQuarterlyFinancialInformationTable_10512"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="Locator_exc_SelectedQuarterlyFinancialInformationLineItems_10511" xlink:to="Locator_exc_SelectedQuarterlyFinancialInformationTable_10512" order="0.5" xbrldt:contextElement="segment" xbrldt:closed="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SelectedQuarterlyFinancialInformationTable" xlink:label="Locator_exc_SelectedQuarterlyFinancialInformationTable_10521"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_10522"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_exc_SelectedQuarterlyFinancialInformationTable_10521" xlink:to="Locator_dei_LegalEntityAxis_10522" order="0.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SelectedQuarterlyFinancialInformationLineItems" xlink:label="Locator_exc_SelectedQuarterlyFinancialInformationLineItems_10533"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_Revenues" xlink:label="Locator_us-gaap_Revenues_10534"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_SelectedQuarterlyFinancialInformationLineItems_10533" xlink:to="Locator_us-gaap_Revenues_10534" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SelectedQuarterlyFinancialInformationLineItems" xlink:label="Locator_exc_SelectedQuarterlyFinancialInformationLineItems_10535"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OperatingIncomeLoss" xlink:label="Locator_us-gaap_OperatingIncomeLoss_10536"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_SelectedQuarterlyFinancialInformationLineItems_10535" xlink:to="Locator_us-gaap_OperatingIncomeLoss_10536" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SelectedQuarterlyFinancialInformationLineItems" xlink:label="Locator_exc_SelectedQuarterlyFinancialInformationLineItems_10537"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="Locator_us-gaap_NetIncomeLoss_10538"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_SelectedQuarterlyFinancialInformationLineItems_10537" xlink:to="Locator_us-gaap_NetIncomeLoss_10538" order="3.0" xbrldt:usable="true"/> |
| | </definitionLink> |
| <definitionLink xlink:type="extended" xlink:role="http://exeloncorp.com/role/DisclosureIntangibleAssetsDetails"> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_10615"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_10616"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_dei_LegalEntityAxis_10615" xlink:to="Locator_dei_EntityDomain_10616" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_10617"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ExelonGenerationCoLLCMember" xlink:label="Locator_exc_ExelonGenerationCoLLCMember_10618"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_10617" xlink:to="Locator_exc_ExelonGenerationCoLLCMember_10618" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_10619"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CommonwealthEdisonCoMember" xlink:label="Locator_exc_CommonwealthEdisonCoMember_10620"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_10619" xlink:to="Locator_exc_CommonwealthEdisonCoMember_10620" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_10621"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PecoEnergyCoMember" xlink:label="Locator_exc_PecoEnergyCoMember_10622"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_10621" xlink:to="Locator_exc_PecoEnergyCoMember_10622" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_10623"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BaltimoreGasAndElectricCompanyMember" xlink:label="Locator_exc_BaltimoreGasAndElectricCompanyMember_10624"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_10623" xlink:to="Locator_exc_BaltimoreGasAndElectricCompanyMember_10624" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_GoodwillByComponentAxis" xlink:label="Locator_exc_GoodwillByComponentAxis_10553"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_GoodwillComponentDomain" xlink:label="Locator_exc_GoodwillComponentDomain_10554"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="Locator_exc_GoodwillByComponentAxis_10553" xlink:to="Locator_exc_GoodwillComponentDomain_10554" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_GoodwillComponentDomain" xlink:label="Locator_exc_GoodwillComponentDomain_10625"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_GoodwillGrossMember" xlink:label="Locator_exc_GoodwillGrossMember_10626"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_GoodwillComponentDomain_10625" xlink:to="Locator_exc_GoodwillGrossMember_10626" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_GoodwillComponentDomain" xlink:label="Locator_exc_GoodwillComponentDomain_10627"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_GoodwillAccumulatedImpairmentLossesMember" xlink:label="Locator_exc_GoodwillAccumulatedImpairmentLossesMember_10628"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_GoodwillComponentDomain_10627" xlink:to="Locator_exc_GoodwillAccumulatedImpairmentLossesMember_10628" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FiveYearDisclosureDomain" xlink:label="Locator_us-gaap_FiveYearDisclosureDomain_10629"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_MoreThanOneAndWithinTwoYearsFromBalanceSheetDateMember" xlink:label="Locator_us-gaap_MoreThanOneAndWithinTwoYearsFromBalanceSheetDateMember_10630"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_FiveYearDisclosureDomain_10629" xlink:to="Locator_us-gaap_MoreThanOneAndWithinTwoYearsFromBalanceSheetDateMember_10630" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RangeMember" xlink:label="Locator_us-gaap_RangeMember_10643"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_MaximumMember" xlink:label="Locator_us-gaap_MaximumMember_10644"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RangeMember_10643" xlink:to="Locator_us-gaap_MaximumMember_10644" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RangeMember" xlink:label="Locator_us-gaap_RangeMember_10645"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_MinimumMember" xlink:label="Locator_us-gaap_MinimumMember_10646"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RangeMember_10645" xlink:to="Locator_us-gaap_MinimumMember_10646" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:label="Locator_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_10631"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ExelonWindAcquisitionMember" xlink:label="Locator_exc_ExelonWindAcquisitionMember_10632"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_10631" xlink:to="Locator_exc_ExelonWindAcquisitionMember_10632" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:label="Locator_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_10633"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AntelopeValleyAcquisitionMember" xlink:label="Locator_exc_AntelopeValleyAcquisitionMember_10634"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_10633" xlink:to="Locator_exc_AntelopeValleyAcquisitionMember_10634" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:label="Locator_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_10635"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_IntangibleAssetNineteenNinetyNineChicagoSettlementAgreementMember" xlink:label="Locator_exc_IntangibleAssetNineteenNinetyNineChicagoSettlementAgreementMember_10636"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_10635" xlink:to="Locator_exc_IntangibleAssetNineteenNinetyNineChicagoSettlementAgreementMember_10636" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:label="Locator_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_10637"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_IntangibleAssetTwoThousandThreeChicagoSettlementAgreementMember" xlink:label="Locator_exc_IntangibleAssetTwoThousandThreeChicagoSettlementAgreementMember_10638"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_10637" xlink:to="Locator_exc_IntangibleAssetTwoThousandThreeChicagoSettlementAgreementMember_10638" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsNetAbstract" xlink:label="Locator_us-gaap_FiniteLivedIntangibleAssetsNetAbstract_10661"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsGross" xlink:label="Locator_us-gaap_FiniteLivedIntangibleAssetsGross_10662"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_FiniteLivedIntangibleAssetsNetAbstract_10661" xlink:to="Locator_us-gaap_FiniteLivedIntangibleAssetsGross_10662" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsNetAbstract" xlink:label="Locator_us-gaap_FiniteLivedIntangibleAssetsNetAbstract_10663"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization" xlink:label="Locator_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_10664"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_FiniteLivedIntangibleAssetsNetAbstract_10663" xlink:to="Locator_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_10664" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsNetAbstract" xlink:label="Locator_us-gaap_FiniteLivedIntangibleAssetsNetAbstract_10665"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsNet" xlink:label="Locator_us-gaap_FiniteLivedIntangibleAssetsNet_10666"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_FiniteLivedIntangibleAssetsNetAbstract_10665" xlink:to="Locator_us-gaap_FiniteLivedIntangibleAssetsNet_10666" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract" xlink:label="Locator_us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract_10649"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FutureAmortizationExpenseYearOne" xlink:label="Locator_us-gaap_FutureAmortizationExpenseYearOne_10650"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract_10649" xlink:to="Locator_us-gaap_FutureAmortizationExpenseYearOne_10650" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract" xlink:label="Locator_us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract_10651"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FutureAmortizationExpenseYearTwo" xlink:label="Locator_us-gaap_FutureAmortizationExpenseYearTwo_10652"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract_10651" xlink:to="Locator_us-gaap_FutureAmortizationExpenseYearTwo_10652" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract" xlink:label="Locator_us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract_10653"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FutureAmortizationExpenseYearThree" xlink:label="Locator_us-gaap_FutureAmortizationExpenseYearThree_10654"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract_10653" xlink:to="Locator_us-gaap_FutureAmortizationExpenseYearThree_10654" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract" xlink:label="Locator_us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract_10655"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FutureAmortizationExpenseYearFour" xlink:label="Locator_us-gaap_FutureAmortizationExpenseYearFour_10656"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract_10655" xlink:to="Locator_us-gaap_FutureAmortizationExpenseYearFour_10656" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract" xlink:label="Locator_us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract_10657"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FutureAmortizationExpenseYearFive" xlink:label="Locator_us-gaap_FutureAmortizationExpenseYearFive_10658"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract_10657" xlink:to="Locator_us-gaap_FutureAmortizationExpenseYearFive_10658" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsLineItems" xlink:label="Locator_us-gaap_FiniteLivedIntangibleAssetsLineItems_10571"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScheduleOfFiniteLivedIntangibleAssetsByMajorClassTable" xlink:label="Locator_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsByMajorClassTable_10572"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="Locator_us-gaap_FiniteLivedIntangibleAssetsLineItems_10571" xlink:to="Locator_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsByMajorClassTable_10572" order="0.5" xbrldt:contextElement="segment" xbrldt:closed="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScheduleOfFiniteLivedIntangibleAssetsByMajorClassTable" xlink:label="Locator_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsByMajorClassTable_10609"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_10610"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsByMajorClassTable_10609" xlink:to="Locator_dei_LegalEntityAxis_10610" order="0.0"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScheduleOfFiniteLivedIntangibleAssetsByMajorClassTable" xlink:label="Locator_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsByMajorClassTable_10611"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis" xlink:label="Locator_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_10612"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsByMajorClassTable_10611" xlink:to="Locator_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_10612" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis" xlink:label="Locator_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_10555"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:label="Locator_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_10556"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="Locator_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_10555" xlink:to="Locator_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_10556" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis" xlink:label="Locator_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_10639"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:label="Locator_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_10640"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_10639" xlink:to="Locator_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_10640" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScheduleOfFiniteLivedIntangibleAssetsByMajorClassTable" xlink:label="Locator_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsByMajorClassTable_10613"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ScheduleOfFiniteLivedIntangibleAssetsByMajorClassAnnualAxis" xlink:label="Locator_exc_ScheduleOfFiniteLivedIntangibleAssetsByMajorClassAnnualAxis_10614"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsByMajorClassTable_10613" xlink:to="Locator_exc_ScheduleOfFiniteLivedIntangibleAssetsByMajorClassAnnualAxis_10614" order="2.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ScheduleOfFiniteLivedIntangibleAssetsByMajorClassAnnualAxis" xlink:label="Locator_exc_ScheduleOfFiniteLivedIntangibleAssetsByMajorClassAnnualAxis_10557"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FiveYearDisclosureDomain" xlink:label="Locator_us-gaap_FiveYearDisclosureDomain_10558"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="Locator_exc_ScheduleOfFiniteLivedIntangibleAssetsByMajorClassAnnualAxis_10557" xlink:to="Locator_us-gaap_FiveYearDisclosureDomain_10558" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ScheduleOfFiniteLivedIntangibleAssetsByMajorClassAnnualAxis" xlink:label="Locator_exc_ScheduleOfFiniteLivedIntangibleAssetsByMajorClassAnnualAxis_10641"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FiveYearDisclosureDomain" xlink:label="Locator_us-gaap_FiveYearDisclosureDomain_10642"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_exc_ScheduleOfFiniteLivedIntangibleAssetsByMajorClassAnnualAxis_10641" xlink:to="Locator_us-gaap_FiveYearDisclosureDomain_10642" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsLineItems" xlink:label="Locator_us-gaap_FiniteLivedIntangibleAssetsLineItems_10647"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract" xlink:label="Locator_us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract_10648"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_FiniteLivedIntangibleAssetsLineItems_10647" xlink:to="Locator_us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract_10648" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsLineItems" xlink:label="Locator_us-gaap_FiniteLivedIntangibleAssetsLineItems_10659"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsNetAbstract" xlink:label="Locator_us-gaap_FiniteLivedIntangibleAssetsNetAbstract_10660"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_FiniteLivedIntangibleAssetsLineItems_10659" xlink:to="Locator_us-gaap_FiniteLivedIntangibleAssetsNetAbstract_10660" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsLineItems" xlink:label="Locator_us-gaap_FiniteLivedIntangibleAssetsLineItems_10667"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FiniteLivedIntangibleAssetsFootnotesAbstract" xlink:label="Locator_exc_FiniteLivedIntangibleAssetsFootnotesAbstract_10668"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_FiniteLivedIntangibleAssetsLineItems_10667" xlink:to="Locator_exc_FiniteLivedIntangibleAssetsFootnotesAbstract_10668" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FiniteLivedIntangibleAssetsFootnotesAbstract" xlink:label="Locator_exc_FiniteLivedIntangibleAssetsFootnotesAbstract_10669"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ThirdPartyPaymentMadeTwoThousandThreeChicagoSettlementAgreement" xlink:label="Locator_exc_ThirdPartyPaymentMadeTwoThousandThreeChicagoSettlementAgreement_10670"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FiniteLivedIntangibleAssetsFootnotesAbstract_10669" xlink:to="Locator_exc_ThirdPartyPaymentMadeTwoThousandThreeChicagoSettlementAgreement_10670" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FiniteLivedIntangibleAssetsFootnotesAbstract" xlink:label="Locator_exc_FiniteLivedIntangibleAssetsFootnotesAbstract_10671"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ThirdPartyPaymentReceivedTwoThousandThreeChicagoSettlementAgreement" xlink:label="Locator_exc_ThirdPartyPaymentReceivedTwoThousandThreeChicagoSettlementAgreement_10672"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FiniteLivedIntangibleAssetsFootnotesAbstract_10671" xlink:to="Locator_exc_ThirdPartyPaymentReceivedTwoThousandThreeChicagoSettlementAgreement_10672" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FiniteLivedIntangibleAssetsFootnotesAbstract" xlink:label="Locator_exc_FiniteLivedIntangibleAssetsFootnotesAbstract_10673"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CityPaymentMadeTwoThousandThreeChicagoSettlementAgreement" xlink:label="Locator_exc_CityPaymentMadeTwoThousandThreeChicagoSettlementAgreement_10674"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FiniteLivedIntangibleAssetsFootnotesAbstract_10673" xlink:to="Locator_exc_CityPaymentMadeTwoThousandThreeChicagoSettlementAgreement_10674" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FiniteLivedIntangibleAssetsFootnotesAbstract" xlink:label="Locator_exc_FiniteLivedIntangibleAssetsFootnotesAbstract_10675"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FiniteLivedLongTermLiabilityAmortization" xlink:label="Locator_exc_FiniteLivedLongTermLiabilityAmortization_10676"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FiniteLivedIntangibleAssetsFootnotesAbstract_10675" xlink:to="Locator_exc_FiniteLivedLongTermLiabilityAmortization_10676" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsLineItems" xlink:label="Locator_us-gaap_FiniteLivedIntangibleAssetsLineItems_10677"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FiniteLivedIntangibleAssetsAmortizationExpenseAbstract" xlink:label="Locator_exc_FiniteLivedIntangibleAssetsAmortizationExpenseAbstract_10678"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_FiniteLivedIntangibleAssetsLineItems_10677" xlink:to="Locator_exc_FiniteLivedIntangibleAssetsAmortizationExpenseAbstract_10678" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FiniteLivedIntangibleAssetsAmortizationExpenseAbstract" xlink:label="Locator_exc_FiniteLivedIntangibleAssetsAmortizationExpenseAbstract_10679"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpense" xlink:label="Locator_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpense_10680"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FiniteLivedIntangibleAssetsAmortizationExpenseAbstract_10679" xlink:to="Locator_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpense_10680" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsLineItems" xlink:label="Locator_us-gaap_FiniteLivedIntangibleAssetsLineItems_10681"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RenewableEnergyIntangiblesAbstract" xlink:label="Locator_exc_RenewableEnergyIntangiblesAbstract_10682"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_FiniteLivedIntangibleAssetsLineItems_10681" xlink:to="Locator_exc_RenewableEnergyIntangiblesAbstract_10682" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RenewableEnergyIntangiblesAbstract" xlink:label="Locator_exc_RenewableEnergyIntangiblesAbstract_10683"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles" xlink:label="Locator_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles_10684"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_RenewableEnergyIntangiblesAbstract_10683" xlink:to="Locator_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles_10684" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RenewableEnergyIntangiblesAbstract" xlink:label="Locator_exc_RenewableEnergyIntangiblesAbstract_10685"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangiblesInAdvancedStagesOfDevelopment" xlink:label="Locator_exc_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangiblesInAdvancedStagesOfDevelopment_10686"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_RenewableEnergyIntangiblesAbstract_10685" xlink:to="Locator_exc_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangiblesInAdvancedStagesOfDevelopment_10686" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RenewableEnergyIntangiblesAbstract" xlink:label="Locator_exc_RenewableEnergyIntangiblesAbstract_10687"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AcquiredFiniteLivedIntangibleAssetWeightedAverageUsefulLife" xlink:label="Locator_us-gaap_AcquiredFiniteLivedIntangibleAssetWeightedAverageUsefulLife_10688"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_RenewableEnergyIntangiblesAbstract_10687" xlink:to="Locator_us-gaap_AcquiredFiniteLivedIntangibleAssetWeightedAverageUsefulLife_10688" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsLineItems" xlink:label="Locator_us-gaap_FiniteLivedIntangibleAssetsLineItems_10689"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RenewableEnergyCreditsAndAlternativeEnergyCreditsAbstract" xlink:label="Locator_exc_RenewableEnergyCreditsAndAlternativeEnergyCreditsAbstract_10690"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_FiniteLivedIntangibleAssetsLineItems_10689" xlink:to="Locator_exc_RenewableEnergyCreditsAndAlternativeEnergyCreditsAbstract_10690" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RenewableEnergyCreditsAndAlternativeEnergyCreditsAbstract" xlink:label="Locator_exc_RenewableEnergyCreditsAndAlternativeEnergyCreditsAbstract_10691"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AlternativeOrRenewableEnergyCreditsCurrent" xlink:label="Locator_exc_AlternativeOrRenewableEnergyCreditsCurrent_10692"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_RenewableEnergyCreditsAndAlternativeEnergyCreditsAbstract_10691" xlink:to="Locator_exc_AlternativeOrRenewableEnergyCreditsCurrent_10692" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RenewableEnergyCreditsAndAlternativeEnergyCreditsAbstract" xlink:label="Locator_exc_RenewableEnergyCreditsAndAlternativeEnergyCreditsAbstract_10693"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AlternativeOrRenewableEnergyCreditsNoncurrent" xlink:label="Locator_exc_AlternativeOrRenewableEnergyCreditsNoncurrent_10694"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_RenewableEnergyCreditsAndAlternativeEnergyCreditsAbstract_10693" xlink:to="Locator_exc_AlternativeOrRenewableEnergyCreditsNoncurrent_10694" order="2.0" xbrldt:usable="true"/> |
| | </definitionLink> |
| <definitionLink xlink:type="extended" xlink:role="http://exeloncorp.com/role/StatementConsolidatedStatementsOfOperationsAndComprehensiveIncomeUnauditedParenthetical"> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_10751"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_10752"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_dei_LegalEntityAxis_10751" xlink:to="Locator_dei_EntityDomain_10752" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_10753"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ParentCompanyMember" xlink:label="Locator_us-gaap_ParentCompanyMember_10754"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_10753" xlink:to="Locator_us-gaap_ParentCompanyMember_10754" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_10755"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ExelonGenerationCoLLCMember" xlink:label="Locator_exc_ExelonGenerationCoLLCMember_10756"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_10755" xlink:to="Locator_exc_ExelonGenerationCoLLCMember_10756" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_10757"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CommonwealthEdisonCoMember" xlink:label="Locator_exc_CommonwealthEdisonCoMember_10758"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_10757" xlink:to="Locator_exc_CommonwealthEdisonCoMember_10758" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_10759"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PecoEnergyCoMember" xlink:label="Locator_exc_PecoEnergyCoMember_10760"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_10759" xlink:to="Locator_exc_PecoEnergyCoMember_10760" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_10761"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BaltimoreGasAndElectricCompanyMember" xlink:label="Locator_exc_BaltimoreGasAndElectricCompanyMember_10762"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_10761" xlink:to="Locator_exc_BaltimoreGasAndElectricCompanyMember_10762" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementTable" xlink:label="Locator_us-gaap_StatementTable_10749"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_10750"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_us-gaap_StatementTable_10749" xlink:to="Locator_dei_LegalEntityAxis_10750" order="0.0"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementLineItems" xlink:label="Locator_us-gaap_StatementLineItems_10745"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementTable" xlink:label="Locator_us-gaap_StatementTable_10746"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="Locator_us-gaap_StatementLineItems_10745" xlink:to="Locator_us-gaap_StatementTable_10746" order="0.5" xbrldt:contextElement="segment" xbrldt:closed="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementLineItems" xlink:label="Locator_us-gaap_StatementLineItems_10763"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DiscontinuedOperationTaxEffectOfIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriod" xlink:label="Locator_us-gaap_DiscontinuedOperationTaxEffectOfIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriod_10764"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_StatementLineItems_10763" xlink:to="Locator_us-gaap_DiscontinuedOperationTaxEffectOfIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriod_10764" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementLineItems" xlink:label="Locator_us-gaap_StatementLineItems_10765"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DiscontinuedOperationTaxEffectOfIncomeLossFromDisposalOfDiscontinuedOperation" xlink:label="Locator_us-gaap_DiscontinuedOperationTaxEffectOfIncomeLossFromDisposalOfDiscontinuedOperation_10766"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_StatementLineItems_10765" xlink:to="Locator_us-gaap_DiscontinuedOperationTaxEffectOfIncomeLossFromDisposalOfDiscontinuedOperation_10766" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementLineItems" xlink:label="Locator_us-gaap_StatementLineItems_10767"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossAmortizationPensionAndOtherPostretirementBenefitPlansNetPriorServiceCostRecognizedInNetPeriodicPensionCostTaxEffect" xlink:label="Locator_us-gaap_OtherComprehensiveIncomeLossAmortizationPensionAndOtherPostretirementBenefitPlansNetPriorServiceCostRecognizedInNetPeriodicPensionCostTaxEffect_10768"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_StatementLineItems_10767" xlink:to="Locator_us-gaap_OtherComprehensiveIncomeLossAmortizationPensionAndOtherPostretirementBenefitPlansNetPriorServiceCostRecognizedInNetPeriodicPensionCostTaxEffect_10768" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementLineItems" xlink:label="Locator_us-gaap_StatementLineItems_10769"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherComprehensiveIncomeReclassificationOfDefinedBenefitPlansNetGainLossRecognizedInNetPeriodicBenefitCostTax" xlink:label="Locator_us-gaap_OtherComprehensiveIncomeReclassificationOfDefinedBenefitPlansNetGainLossRecognizedInNetPeriodicBenefitCostTax_10770"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_StatementLineItems_10769" xlink:to="Locator_us-gaap_OtherComprehensiveIncomeReclassificationOfDefinedBenefitPlansNetGainLossRecognizedInNetPeriodicBenefitCostTax_10770" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementLineItems" xlink:label="Locator_us-gaap_StatementLineItems_10771"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherComprehensiveIncomeReclassificationOfDefinedBenefitPlantNetTransitionAssetObligationRecognizedInNetPeriodicBenefitCostTax" xlink:label="Locator_us-gaap_OtherComprehensiveIncomeReclassificationOfDefinedBenefitPlantNetTransitionAssetObligationRecognizedInNetPeriodicBenefitCostTax_10772"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_StatementLineItems_10771" xlink:to="Locator_us-gaap_OtherComprehensiveIncomeReclassificationOfDefinedBenefitPlantNetTransitionAssetObligationRecognizedInNetPeriodicBenefitCostTax_10772" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementLineItems" xlink:label="Locator_us-gaap_StatementLineItems_10773"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OtherComprehensiveIncomePensionAndNonPensionPostretirementBenefitPlanValuationAdjustmentTax" xlink:label="Locator_exc_OtherComprehensiveIncomePensionAndNonPensionPostretirementBenefitPlanValuationAdjustmentTax_10774"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_StatementLineItems_10773" xlink:to="Locator_exc_OtherComprehensiveIncomePensionAndNonPensionPostretirementBenefitPlanValuationAdjustmentTax_10774" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementLineItems" xlink:label="Locator_us-gaap_StatementLineItems_10775"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax" xlink:label="Locator_us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax_10776"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_StatementLineItems_10775" xlink:to="Locator_us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax_10776" order="7.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementLineItems" xlink:label="Locator_us-gaap_StatementLineItems_10777"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax" xlink:label="Locator_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax_10778"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_StatementLineItems_10777" xlink:to="Locator_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax_10778" order="8.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementLineItems" xlink:label="Locator_us-gaap_StatementLineItems_10779"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherComprehensiveIncomeReclassificationAdjustmentOnDerivativesIncludedInNetIncomeTax" xlink:label="Locator_us-gaap_OtherComprehensiveIncomeReclassificationAdjustmentOnDerivativesIncludedInNetIncomeTax_10780"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_StatementLineItems_10779" xlink:to="Locator_us-gaap_OtherComprehensiveIncomeReclassificationAdjustmentOnDerivativesIncludedInNetIncomeTax_10780" order="9.0" xbrldt:usable="true"/> |
| | </definitionLink> |
| <definitionLink xlink:type="extended" xlink:role="http://exeloncorp.com/role/DisclosureMergerAndAcquisitionsTables"> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_10819"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_10820"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_dei_LegalEntityAxis_10819" xlink:to="Locator_dei_EntityDomain_10820" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_10821"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ExelonGenerationCoLLCMember" xlink:label="Locator_exc_ExelonGenerationCoLLCMember_10822"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_10821" xlink:to="Locator_exc_ExelonGenerationCoLLCMember_10822" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessAcquisitionLineItems" xlink:label="Locator_us-gaap_BusinessAcquisitionLineItems_10815"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable" xlink:label="Locator_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_10816"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="Locator_us-gaap_BusinessAcquisitionLineItems_10815" xlink:to="Locator_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_10816" order="0.5" xbrldt:contextElement="segment" xbrldt:closed="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable" xlink:label="Locator_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_10817"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_10818"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_10817" xlink:to="Locator_dei_LegalEntityAxis_10818" order="0.0"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessAcquisitionLineItems" xlink:label="Locator_us-gaap_BusinessAcquisitionLineItems_10823"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionContingentConsiderationTextBlock" xlink:label="Locator_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionContingentConsiderationTextBlock_10824"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_BusinessAcquisitionLineItems_10823" xlink:to="Locator_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionContingentConsiderationTextBlock_10824" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessAcquisitionLineItems" xlink:label="Locator_us-gaap_BusinessAcquisitionLineItems_10825"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionEquityInterestIssuedOrIssuableTextBlock" xlink:label="Locator_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionEquityInterestIssuedOrIssuableTextBlock_10826"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_BusinessAcquisitionLineItems_10825" xlink:to="Locator_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionEquityInterestIssuedOrIssuableTextBlock_10826" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessAcquisitionLineItems" xlink:label="Locator_us-gaap_BusinessAcquisitionLineItems_10827"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScheduleOfPurchasePriceAllocationTableTextBlock" xlink:label="Locator_us-gaap_ScheduleOfPurchasePriceAllocationTableTextBlock_10828"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_BusinessAcquisitionLineItems_10827" xlink:to="Locator_us-gaap_ScheduleOfPurchasePriceAllocationTableTextBlock_10828" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessAcquisitionLineItems" xlink:label="Locator_us-gaap_BusinessAcquisitionLineItems_10829"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScheduleOfFiniteLivedIntangibleAssetsAcquiredAsPartOfBusinessCombinationTextBlock" xlink:label="Locator_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsAcquiredAsPartOfBusinessCombinationTextBlock_10830"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_BusinessAcquisitionLineItems_10829" xlink:to="Locator_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsAcquiredAsPartOfBusinessCombinationTextBlock_10830" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessAcquisitionLineItems" xlink:label="Locator_us-gaap_BusinessAcquisitionLineItems_10831"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScheduleOfRestructuringAndRelatedCostsTextBlock" xlink:label="Locator_us-gaap_ScheduleOfRestructuringAndRelatedCostsTextBlock_10832"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_BusinessAcquisitionLineItems_10831" xlink:to="Locator_us-gaap_ScheduleOfRestructuringAndRelatedCostsTextBlock_10832" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessAcquisitionLineItems" xlink:label="Locator_us-gaap_BusinessAcquisitionLineItems_10833"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScheduleOfRestructuringReserveByTypeOfCostTextBlock" xlink:label="Locator_us-gaap_ScheduleOfRestructuringReserveByTypeOfCostTextBlock_10834"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_BusinessAcquisitionLineItems_10833" xlink:to="Locator_us-gaap_ScheduleOfRestructuringReserveByTypeOfCostTextBlock_10834" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessAcquisitionLineItems" xlink:label="Locator_us-gaap_BusinessAcquisitionLineItems_10835"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessAcquisitionProFormaInformationTextBlock" xlink:label="Locator_us-gaap_BusinessAcquisitionProFormaInformationTextBlock_10836"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_BusinessAcquisitionLineItems_10835" xlink:to="Locator_us-gaap_BusinessAcquisitionProFormaInformationTextBlock_10836" order="7.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessAcquisitionLineItems" xlink:label="Locator_us-gaap_BusinessAcquisitionLineItems_10837"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTextBlock" xlink:label="Locator_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTextBlock_10838"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_BusinessAcquisitionLineItems_10837" xlink:to="Locator_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTextBlock_10838" order="8.0" xbrldt:usable="true"/> |
| | </definitionLink> |
| <definitionLink xlink:type="extended" xlink:role="http://exeloncorp.com/role/BasisOfPresentationDetails"> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_10917"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_10918"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_dei_LegalEntityAxis_10917" xlink:to="Locator_dei_EntityDomain_10918" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_10919"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ExelonGenerationCoLLCMember" xlink:label="Locator_exc_ExelonGenerationCoLLCMember_10920"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_10919" xlink:to="Locator_exc_ExelonGenerationCoLLCMember_10920" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_10921"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CommonwealthEdisonCoMember" xlink:label="Locator_exc_CommonwealthEdisonCoMember_10922"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_10921" xlink:to="Locator_exc_CommonwealthEdisonCoMember_10922" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_10923"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PecoEnergyCoMember" xlink:label="Locator_exc_PecoEnergyCoMember_10924"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_10923" xlink:to="Locator_exc_PecoEnergyCoMember_10924" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_10925"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BaltimoreGasAndElectricCompanyMember" xlink:label="Locator_exc_BaltimoreGasAndElectricCompanyMember_10926"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_10925" xlink:to="Locator_exc_BaltimoreGasAndElectricCompanyMember_10926" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_VariableInterestEntityLineItems" xlink:label="Locator_us-gaap_VariableInterestEntityLineItems_10945"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_VariableInterestEntityPrimaryBeneficiaryDoesNotHoldMajorityVotingInterestDisclosuresAbstract" xlink:label="Locator_us-gaap_VariableInterestEntityPrimaryBeneficiaryDoesNotHoldMajorityVotingInterestDisclosuresAbstract_10946"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_VariableInterestEntityLineItems_10945" xlink:to="Locator_us-gaap_VariableInterestEntityPrimaryBeneficiaryDoesNotHoldMajorityVotingInterestDisclosuresAbstract_10946" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_VariableInterestEntityPrimaryBeneficiaryDoesNotHoldMajorityVotingInterestDisclosuresAbstract" xlink:label="Locator_us-gaap_VariableInterestEntityPrimaryBeneficiaryDoesNotHoldMajorityVotingInterestDisclosuresAbstract_10947"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OwnershipPercentageOfConsolidatedVariableInterestEntities" xlink:label="Locator_exc_OwnershipPercentageOfConsolidatedVariableInterestEntities_10948"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_VariableInterestEntityPrimaryBeneficiaryDoesNotHoldMajorityVotingInterestDisclosuresAbstract_10947" xlink:to="Locator_exc_OwnershipPercentageOfConsolidatedVariableInterestEntities_10948" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_VariableInterestEntityPrimaryBeneficiaryDoesNotHoldMajorityVotingInterestDisclosuresAbstract" xlink:label="Locator_us-gaap_VariableInterestEntityPrimaryBeneficiaryDoesNotHoldMajorityVotingInterestDisclosuresAbstract_10949"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AmountRemittedToVariableInterestEntitiesOnRateStabilizationBonds" xlink:label="Locator_exc_AmountRemittedToVariableInterestEntitiesOnRateStabilizationBonds_10950"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_VariableInterestEntityPrimaryBeneficiaryDoesNotHoldMajorityVotingInterestDisclosuresAbstract_10949" xlink:to="Locator_exc_AmountRemittedToVariableInterestEntitiesOnRateStabilizationBonds_10950" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_VariableInterestEntityPrimaryBeneficiaryDoesNotHoldMajorityVotingInterestDisclosuresAbstract" xlink:label="Locator_us-gaap_VariableInterestEntityPrimaryBeneficiaryDoesNotHoldMajorityVotingInterestDisclosuresAbstract_10951"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_GuaranteeObligationsCurrentCarryingValue" xlink:label="Locator_us-gaap_GuaranteeObligationsCurrentCarryingValue_10952"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_VariableInterestEntityPrimaryBeneficiaryDoesNotHoldMajorityVotingInterestDisclosuresAbstract_10951" xlink:to="Locator_us-gaap_GuaranteeObligationsCurrentCarryingValue_10952" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_VariableInterestEntityPrimaryBeneficiaryDoesNotHoldMajorityVotingInterestDisclosuresAbstract" xlink:label="Locator_us-gaap_VariableInterestEntityPrimaryBeneficiaryDoesNotHoldMajorityVotingInterestDisclosuresAbstract_10953"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_VariableInterestEntityConsolidatedCarryingAmountAssetsAndLiabilitiesAbstract" xlink:label="Locator_us-gaap_VariableInterestEntityConsolidatedCarryingAmountAssetsAndLiabilitiesAbstract_10954"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_VariableInterestEntityPrimaryBeneficiaryDoesNotHoldMajorityVotingInterestDisclosuresAbstract_10953" xlink:to="Locator_us-gaap_VariableInterestEntityConsolidatedCarryingAmountAssetsAndLiabilitiesAbstract_10954" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_VariableInterestEntityConsolidatedCarryingAmountAssetsAndLiabilitiesAbstract" xlink:label="Locator_us-gaap_VariableInterestEntityConsolidatedCarryingAmountAssetsAndLiabilitiesAbstract_10955"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_VariableInterestEntityConsolidatedCarryingAmountAssetsCurrent" xlink:label="Locator_exc_VariableInterestEntityConsolidatedCarryingAmountAssetsCurrent_10956"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_VariableInterestEntityConsolidatedCarryingAmountAssetsAndLiabilitiesAbstract_10955" xlink:to="Locator_exc_VariableInterestEntityConsolidatedCarryingAmountAssetsCurrent_10956" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_VariableInterestEntityConsolidatedCarryingAmountAssetsAndLiabilitiesAbstract" xlink:label="Locator_us-gaap_VariableInterestEntityConsolidatedCarryingAmountAssetsAndLiabilitiesAbstract_10957"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_VariableInterestEntityConsolidatedCarryingAmountAssetsNoncurrent" xlink:label="Locator_exc_VariableInterestEntityConsolidatedCarryingAmountAssetsNoncurrent_10958"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_VariableInterestEntityConsolidatedCarryingAmountAssetsAndLiabilitiesAbstract_10957" xlink:to="Locator_exc_VariableInterestEntityConsolidatedCarryingAmountAssetsNoncurrent_10958" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_VariableInterestEntityConsolidatedCarryingAmountAssetsAndLiabilitiesAbstract" xlink:label="Locator_us-gaap_VariableInterestEntityConsolidatedCarryingAmountAssetsAndLiabilitiesAbstract_10959"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_VariableInterestEntityConsolidatedCarryingAmountAssets" xlink:label="Locator_us-gaap_VariableInterestEntityConsolidatedCarryingAmountAssets_10960"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_VariableInterestEntityConsolidatedCarryingAmountAssetsAndLiabilitiesAbstract_10959" xlink:to="Locator_us-gaap_VariableInterestEntityConsolidatedCarryingAmountAssets_10960" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_VariableInterestEntityConsolidatedCarryingAmountAssetsAndLiabilitiesAbstract" xlink:label="Locator_us-gaap_VariableInterestEntityConsolidatedCarryingAmountAssetsAndLiabilitiesAbstract_10961"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_VariableInterestEntityConsolidatedCarryingAmountLiabilitiesCurrent" xlink:label="Locator_exc_VariableInterestEntityConsolidatedCarryingAmountLiabilitiesCurrent_10962"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_VariableInterestEntityConsolidatedCarryingAmountAssetsAndLiabilitiesAbstract_10961" xlink:to="Locator_exc_VariableInterestEntityConsolidatedCarryingAmountLiabilitiesCurrent_10962" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_VariableInterestEntityConsolidatedCarryingAmountAssetsAndLiabilitiesAbstract" xlink:label="Locator_us-gaap_VariableInterestEntityConsolidatedCarryingAmountAssetsAndLiabilitiesAbstract_10963"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_VariableInterestEntityConsolidatedCarryingAmountLiabilitiesNoncurrent" xlink:label="Locator_exc_VariableInterestEntityConsolidatedCarryingAmountLiabilitiesNoncurrent_10964"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_VariableInterestEntityConsolidatedCarryingAmountAssetsAndLiabilitiesAbstract_10963" xlink:to="Locator_exc_VariableInterestEntityConsolidatedCarryingAmountLiabilitiesNoncurrent_10964" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_VariableInterestEntityConsolidatedCarryingAmountAssetsAndLiabilitiesAbstract" xlink:label="Locator_us-gaap_VariableInterestEntityConsolidatedCarryingAmountAssetsAndLiabilitiesAbstract_10965"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_VariableInterestEntityConsolidatedCarryingAmountLiabilities" xlink:label="Locator_us-gaap_VariableInterestEntityConsolidatedCarryingAmountLiabilities_10966"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_VariableInterestEntityConsolidatedCarryingAmountAssetsAndLiabilitiesAbstract_10965" xlink:to="Locator_us-gaap_VariableInterestEntityConsolidatedCarryingAmountLiabilities_10966" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_VariableInterestEntityLineItems" xlink:label="Locator_us-gaap_VariableInterestEntityLineItems_10967"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_VariableInterestEntityNotPrimaryBeneficiaryDisclosuresAbstract" xlink:label="Locator_us-gaap_VariableInterestEntityNotPrimaryBeneficiaryDisclosuresAbstract_10968"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_VariableInterestEntityLineItems_10967" xlink:to="Locator_us-gaap_VariableInterestEntityNotPrimaryBeneficiaryDisclosuresAbstract_10968" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_VariableInterestEntityNotPrimaryBeneficiaryDisclosuresAbstract" xlink:label="Locator_us-gaap_VariableInterestEntityNotPrimaryBeneficiaryDisclosuresAbstract_10969"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NumberOfVariableInterestEntitiesNotConsolidated" xlink:label="Locator_exc_NumberOfVariableInterestEntitiesNotConsolidated_10970"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_VariableInterestEntityNotPrimaryBeneficiaryDisclosuresAbstract_10969" xlink:to="Locator_exc_NumberOfVariableInterestEntitiesNotConsolidated_10970" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_VariableInterestEntityNotPrimaryBeneficiaryDisclosuresAbstract" xlink:label="Locator_us-gaap_VariableInterestEntityNotPrimaryBeneficiaryDisclosuresAbstract_10971"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_VariableInterestEntityNonconsolidatedCarryingAmountAssetsLiabilitiesAndOtherInformationAbstract" xlink:label="Locator_exc_VariableInterestEntityNonconsolidatedCarryingAmountAssetsLiabilitiesAndOtherInformationAbstract_10972"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_VariableInterestEntityNotPrimaryBeneficiaryDisclosuresAbstract_10971" xlink:to="Locator_exc_VariableInterestEntityNonconsolidatedCarryingAmountAssetsLiabilitiesAndOtherInformationAbstract_10972" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_VariableInterestEntityNonconsolidatedCarryingAmountAssetsLiabilitiesAndOtherInformationAbstract" xlink:label="Locator_exc_VariableInterestEntityNonconsolidatedCarryingAmountAssetsLiabilitiesAndOtherInformationAbstract_10973"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_VariableInterestEntityNonconsolidatedCarryingAmountAssets" xlink:label="Locator_us-gaap_VariableInterestEntityNonconsolidatedCarryingAmountAssets_10974"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_VariableInterestEntityNonconsolidatedCarryingAmountAssetsLiabilitiesAndOtherInformationAbstract_10973" xlink:to="Locator_us-gaap_VariableInterestEntityNonconsolidatedCarryingAmountAssets_10974" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_VariableInterestEntityNonconsolidatedCarryingAmountAssetsLiabilitiesAndOtherInformationAbstract" xlink:label="Locator_exc_VariableInterestEntityNonconsolidatedCarryingAmountAssetsLiabilitiesAndOtherInformationAbstract_10975"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_VariableInterestEntityNonconsolidatedCarryingAmountLiabilities" xlink:label="Locator_us-gaap_VariableInterestEntityNonconsolidatedCarryingAmountLiabilities_10976"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_VariableInterestEntityNonconsolidatedCarryingAmountAssetsLiabilitiesAndOtherInformationAbstract_10975" xlink:to="Locator_us-gaap_VariableInterestEntityNonconsolidatedCarryingAmountLiabilities_10976" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_VariableInterestEntityNonconsolidatedCarryingAmountAssetsLiabilitiesAndOtherInformationAbstract" xlink:label="Locator_exc_VariableInterestEntityNonconsolidatedCarryingAmountAssetsLiabilitiesAndOtherInformationAbstract_10977"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_InvestmentsInNonconsolidatedVariableInterestEntities" xlink:label="Locator_exc_InvestmentsInNonconsolidatedVariableInterestEntities_10978"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_VariableInterestEntityNonconsolidatedCarryingAmountAssetsLiabilitiesAndOtherInformationAbstract_10977" xlink:to="Locator_exc_InvestmentsInNonconsolidatedVariableInterestEntities_10978" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_VariableInterestEntityNonconsolidatedCarryingAmountAssetsLiabilitiesAndOtherInformationAbstract" xlink:label="Locator_exc_VariableInterestEntityNonconsolidatedCarryingAmountAssetsLiabilitiesAndOtherInformationAbstract_10979"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OtherNonconsolidatedVariableInterestEntityOwnershipInterests" xlink:label="Locator_exc_OtherNonconsolidatedVariableInterestEntityOwnershipInterests_10980"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_VariableInterestEntityNonconsolidatedCarryingAmountAssetsLiabilitiesAndOtherInformationAbstract_10979" xlink:to="Locator_exc_OtherNonconsolidatedVariableInterestEntityOwnershipInterests_10980" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_VariableInterestEntityNonconsolidatedCarryingAmountAssetsLiabilitiesAndOtherInformationAbstract" xlink:label="Locator_exc_VariableInterestEntityNonconsolidatedCarryingAmountAssetsLiabilitiesAndOtherInformationAbstract_10981"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_VariableInterestEntityEntityMaximumLossExposureAmount" xlink:label="Locator_us-gaap_VariableInterestEntityEntityMaximumLossExposureAmount_10982"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_VariableInterestEntityNonconsolidatedCarryingAmountAssetsLiabilitiesAndOtherInformationAbstract_10981" xlink:to="Locator_us-gaap_VariableInterestEntityEntityMaximumLossExposureAmount_10982" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_VariableInterestEntityLineItems" xlink:label="Locator_us-gaap_VariableInterestEntityLineItems_10867"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScheduleOfVariableInterestEntitiesTable" xlink:label="Locator_us-gaap_ScheduleOfVariableInterestEntitiesTable_10868"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="Locator_us-gaap_VariableInterestEntityLineItems_10867" xlink:to="Locator_us-gaap_ScheduleOfVariableInterestEntitiesTable_10868" order="0.5" xbrldt:contextElement="segment" xbrldt:closed="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScheduleOfVariableInterestEntitiesTable" xlink:label="Locator_us-gaap_ScheduleOfVariableInterestEntitiesTable_10911"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_10912"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_us-gaap_ScheduleOfVariableInterestEntitiesTable_10911" xlink:to="Locator_dei_LegalEntityAxis_10912" order="0.0"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScheduleOfVariableInterestEntitiesTable" xlink:label="Locator_us-gaap_ScheduleOfVariableInterestEntitiesTable_10915"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ClassificationOfLossExposureAxis" xlink:label="Locator_exc_ClassificationOfLossExposureAxis_10916"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_us-gaap_ScheduleOfVariableInterestEntitiesTable_10915" xlink:to="Locator_exc_ClassificationOfLossExposureAxis_10916" order="2.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ClassificationOfLossExposureAxis" xlink:label="Locator_exc_ClassificationOfLossExposureAxis_10859"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_LossExposureDomain" xlink:label="Locator_exc_LossExposureDomain_10860"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="Locator_exc_ClassificationOfLossExposureAxis_10859" xlink:to="Locator_exc_LossExposureDomain_10860" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ClassificationOfLossExposureAxis" xlink:label="Locator_exc_ClassificationOfLossExposureAxis_10927"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_LossExposureDomain" xlink:label="Locator_exc_LossExposureDomain_10928"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_exc_ClassificationOfLossExposureAxis_10927" xlink:to="Locator_exc_LossExposureDomain_10928" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_LossExposureDomain" xlink:label="Locator_exc_LossExposureDomain_10929"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LetterOfCreditMember" xlink:label="Locator_us-gaap_LetterOfCreditMember_10930"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_LossExposureDomain_10929" xlink:to="Locator_us-gaap_LetterOfCreditMember_10930" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_LossExposureDomain" xlink:label="Locator_exc_LossExposureDomain_10931"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_InvestmentsMember" xlink:label="Locator_us-gaap_InvestmentsMember_10932"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_LossExposureDomain_10931" xlink:to="Locator_us-gaap_InvestmentsMember_10932" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_LossExposureDomain" xlink:label="Locator_exc_LossExposureDomain_10933"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PaymentGuaranteeMember" xlink:label="Locator_us-gaap_PaymentGuaranteeMember_10934"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_LossExposureDomain_10933" xlink:to="Locator_us-gaap_PaymentGuaranteeMember_10934" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScheduleOfVariableInterestEntitiesTable" xlink:label="Locator_us-gaap_ScheduleOfVariableInterestEntitiesTable_10913"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis" xlink:label="Locator_us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis_10914"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_us-gaap_ScheduleOfVariableInterestEntitiesTable_10913" xlink:to="Locator_us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis_10914" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis" xlink:label="Locator_us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis_10861"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ClassificationOfVariableInterestEntityDomain" xlink:label="Locator_us-gaap_ClassificationOfVariableInterestEntityDomain_10862"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="Locator_us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis_10861" xlink:to="Locator_us-gaap_ClassificationOfVariableInterestEntityDomain_10862" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis" xlink:label="Locator_us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis_10935"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ClassificationOfVariableInterestEntityDomain" xlink:label="Locator_us-gaap_ClassificationOfVariableInterestEntityDomain_10936"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis_10935" xlink:to="Locator_us-gaap_ClassificationOfVariableInterestEntityDomain_10936" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ClassificationOfVariableInterestEntityDomain" xlink:label="Locator_us-gaap_ClassificationOfVariableInterestEntityDomain_10937"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RsbBondCoLlcMember" xlink:label="Locator_exc_RsbBondCoLlcMember_10938"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_ClassificationOfVariableInterestEntityDomain_10937" xlink:to="Locator_exc_RsbBondCoLlcMember_10938" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ClassificationOfVariableInterestEntityDomain" xlink:label="Locator_us-gaap_ClassificationOfVariableInterestEntityDomain_10939"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PowerContractMonetizationEntitiesMember" xlink:label="Locator_exc_PowerContractMonetizationEntitiesMember_10940"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_ClassificationOfVariableInterestEntityDomain_10939" xlink:to="Locator_exc_PowerContractMonetizationEntitiesMember_10940" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ClassificationOfVariableInterestEntityDomain" xlink:label="Locator_us-gaap_ClassificationOfVariableInterestEntityDomain_10941"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OtherThanPowerContractMonetizationEntitiesMember" xlink:label="Locator_exc_OtherThanPowerContractMonetizationEntitiesMember_10942"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_ClassificationOfVariableInterestEntityDomain_10941" xlink:to="Locator_exc_OtherThanPowerContractMonetizationEntitiesMember_10942" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ClassificationOfVariableInterestEntityDomain" xlink:label="Locator_us-gaap_ClassificationOfVariableInterestEntityDomain_10943"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SolarProjectLimitedLiabilityCompaniesMember" xlink:label="Locator_exc_SolarProjectLimitedLiabilityCompaniesMember_10944"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_ClassificationOfVariableInterestEntityDomain_10943" xlink:to="Locator_exc_SolarProjectLimitedLiabilityCompaniesMember_10944" order="3.0" xbrldt:usable="true"/> |
| | </definitionLink> |
| <definitionLink xlink:type="extended" xlink:role="http://exeloncorp.com/role/DisclosureNuclearDecommissioningExelonAndGeneration"> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_11031"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_11032"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_dei_LegalEntityAxis_11031" xlink:to="Locator_dei_EntityDomain_11032" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_11033"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ExelonGenerationCoLLCMember" xlink:label="Locator_exc_ExelonGenerationCoLLCMember_11034"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_11033" xlink:to="Locator_exc_ExelonGenerationCoLLCMember_11034" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NuclearDecommissioningDisclosureLineItems" xlink:label="Locator_exc_NuclearDecommissioningDisclosureLineItems_11027"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NuclearDecommissioningDisclosureTextBlockTable" xlink:label="Locator_exc_NuclearDecommissioningDisclosureTextBlockTable_11028"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="Locator_exc_NuclearDecommissioningDisclosureLineItems_11027" xlink:to="Locator_exc_NuclearDecommissioningDisclosureTextBlockTable_11028" order="0.5" xbrldt:contextElement="segment" xbrldt:closed="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NuclearDecommissioningDisclosureTextBlockTable" xlink:label="Locator_exc_NuclearDecommissioningDisclosureTextBlockTable_11029"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_11030"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_exc_NuclearDecommissioningDisclosureTextBlockTable_11029" xlink:to="Locator_dei_LegalEntityAxis_11030" order="0.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NuclearDecommissioningDisclosureLineItems" xlink:label="Locator_exc_NuclearDecommissioningDisclosureLineItems_11035"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AssetRetirementObligationDisclosureTextBlock" xlink:label="Locator_us-gaap_AssetRetirementObligationDisclosureTextBlock_11036"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_NuclearDecommissioningDisclosureLineItems_11035" xlink:to="Locator_us-gaap_AssetRetirementObligationDisclosureTextBlock_11036" order="1.0" xbrldt:usable="true"/> |
| | </definitionLink> |
| <definitionLink xlink:type="extended" xlink:role="http://exeloncorp.com/role/DisclosureNuclearDecommissioningTables"> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_11053"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_11054"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_dei_LegalEntityAxis_11053" xlink:to="Locator_dei_EntityDomain_11054" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_11055"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ExelonGenerationCoLLCMember" xlink:label="Locator_exc_ExelonGenerationCoLLCMember_11056"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_11055" xlink:to="Locator_exc_ExelonGenerationCoLLCMember_11056" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ScheduleOfNuclearDecommissioningLineItems" xlink:label="Locator_exc_ScheduleOfNuclearDecommissioningLineItems_11049"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ScheduleOfNuclearDecommissioningTable" xlink:label="Locator_exc_ScheduleOfNuclearDecommissioningTable_11050"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="Locator_exc_ScheduleOfNuclearDecommissioningLineItems_11049" xlink:to="Locator_exc_ScheduleOfNuclearDecommissioningTable_11050" order="0.5" xbrldt:contextElement="segment" xbrldt:closed="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ScheduleOfNuclearDecommissioningTable" xlink:label="Locator_exc_ScheduleOfNuclearDecommissioningTable_11051"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_11052"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_exc_ScheduleOfNuclearDecommissioningTable_11051" xlink:to="Locator_dei_LegalEntityAxis_11052" order="0.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ScheduleOfNuclearDecommissioningLineItems" xlink:label="Locator_exc_ScheduleOfNuclearDecommissioningLineItems_11057"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NuclearDecommissioningAssetRetirementObligationRollforwardTextBlock" xlink:label="Locator_exc_NuclearDecommissioningAssetRetirementObligationRollforwardTextBlock_11058"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_ScheduleOfNuclearDecommissioningLineItems_11057" xlink:to="Locator_exc_NuclearDecommissioningAssetRetirementObligationRollforwardTextBlock_11058" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ScheduleOfNuclearDecommissioningLineItems" xlink:label="Locator_exc_ScheduleOfNuclearDecommissioningLineItems_11059"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_UnrealizedGainsLossesOnNuclearDecommissioningTrustFundsTextBlock" xlink:label="Locator_exc_UnrealizedGainsLossesOnNuclearDecommissioningTrustFundsTextBlock_11060"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_ScheduleOfNuclearDecommissioningLineItems_11059" xlink:to="Locator_exc_UnrealizedGainsLossesOnNuclearDecommissioningTrustFundsTextBlock_11060" order="2.0" xbrldt:usable="true"/> |
| | </definitionLink> |
| <definitionLink xlink:type="extended" xlink:role="http://exeloncorp.com/role/DisclosureNuclearDecommissioningDetails"> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_11159"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_11160"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_dei_LegalEntityAxis_11159" xlink:to="Locator_dei_EntityDomain_11160" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_11161"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ExelonGenerationCoLLCMember" xlink:label="Locator_exc_ExelonGenerationCoLLCMember_11162"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_11161" xlink:to="Locator_exc_ExelonGenerationCoLLCMember_11162" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_11163"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PecoEnergyCoMember" xlink:label="Locator_exc_PecoEnergyCoMember_11164"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_11163" xlink:to="Locator_exc_PecoEnergyCoMember_11164" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_UnrealizedLossesOnNuclearDecommissioningTrustFundInvestmentLineItems" xlink:label="Locator_exc_UnrealizedLossesOnNuclearDecommissioningTrustFundInvestmentLineItems_11075"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_UnrealizedLossesOnNuclearDecommissioningTrustFundInvestmentTable" xlink:label="Locator_exc_UnrealizedLossesOnNuclearDecommissioningTrustFundInvestmentTable_11076"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="Locator_exc_UnrealizedLossesOnNuclearDecommissioningTrustFundInvestmentLineItems_11075" xlink:to="Locator_exc_UnrealizedLossesOnNuclearDecommissioningTrustFundInvestmentTable_11076" order="0.5" xbrldt:contextElement="segment" xbrldt:closed="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_UnrealizedLossesOnNuclearDecommissioningTrustFundInvestmentTable" xlink:label="Locator_exc_UnrealizedLossesOnNuclearDecommissioningTrustFundInvestmentTable_11153"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_11154"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_exc_UnrealizedLossesOnNuclearDecommissioningTrustFundInvestmentTable_11153" xlink:to="Locator_dei_LegalEntityAxis_11154" order="0.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_UnrealizedLossesOnNuclearDecommissioningTrustFundInvestmentLineItems" xlink:label="Locator_exc_UnrealizedLossesOnNuclearDecommissioningTrustFundInvestmentLineItems_11165"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_UnrealizedGainLossInvestmentIncomeNuclearDecommissioningTrustFundsRegulatoryAccounting" xlink:label="Locator_exc_UnrealizedGainLossInvestmentIncomeNuclearDecommissioningTrustFundsRegulatoryAccounting_11166"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_UnrealizedLossesOnNuclearDecommissioningTrustFundInvestmentLineItems_11165" xlink:to="Locator_exc_UnrealizedGainLossInvestmentIncomeNuclearDecommissioningTrustFundsRegulatoryAccounting_11166" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_UnrealizedLossesOnNuclearDecommissioningTrustFundInvestmentLineItems" xlink:label="Locator_exc_UnrealizedLossesOnNuclearDecommissioningTrustFundInvestmentLineItems_11167"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_UnrealizedGainLossInvestmentIncomeNuclearDecommissioningTrustFundsNonregulatoryAccounting" xlink:label="Locator_exc_UnrealizedGainLossInvestmentIncomeNuclearDecommissioningTrustFundsNonregulatoryAccounting_11168"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_UnrealizedLossesOnNuclearDecommissioningTrustFundInvestmentLineItems_11167" xlink:to="Locator_exc_UnrealizedGainLossInvestmentIncomeNuclearDecommissioningTrustFundsNonregulatoryAccounting_11168" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_UnrealizedLossesOnNuclearDecommissioningTrustFundInvestmentLineItems" xlink:label="Locator_exc_UnrealizedLossesOnNuclearDecommissioningTrustFundInvestmentLineItems_11169"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FootnotesToUnrealizedGainsLossesOnNdtFundsAbstract" xlink:label="Locator_exc_FootnotesToUnrealizedGainsLossesOnNdtFundsAbstract_11170"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_UnrealizedLossesOnNuclearDecommissioningTrustFundInvestmentLineItems_11169" xlink:to="Locator_exc_FootnotesToUnrealizedGainsLossesOnNdtFundsAbstract_11170" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FootnotesToUnrealizedGainsLossesOnNdtFundsAbstract" xlink:label="Locator_exc_FootnotesToUnrealizedGainsLossesOnNdtFundsAbstract_11171"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_UnrealizedGainLossInvestmentIncomeZionStationPledgedAssets" xlink:label="Locator_exc_UnrealizedGainLossInvestmentIncomeZionStationPledgedAssets_11172"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FootnotesToUnrealizedGainsLossesOnNdtFundsAbstract_11171" xlink:to="Locator_exc_UnrealizedGainLossInvestmentIncomeZionStationPledgedAssets_11172" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NuclearDecommissioningAssetRetirementObligationsAbstract" xlink:label="Locator_exc_NuclearDecommissioningAssetRetirementObligationsAbstract_11191"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_IncreaseDecreaseToNuclearAssetRetirementObligation" xlink:label="Locator_exc_IncreaseDecreaseToNuclearAssetRetirementObligation_11192"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_NuclearDecommissioningAssetRetirementObligationsAbstract_11191" xlink:to="Locator_exc_IncreaseDecreaseToNuclearAssetRetirementObligation_11192" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NuclearDecommissioningAssetRetirementObligationsAbstract" xlink:label="Locator_exc_NuclearDecommissioningAssetRetirementObligationsAbstract_11193"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NetAdjustmentToNuclearAssetRetirementObligation" xlink:label="Locator_exc_NetAdjustmentToNuclearAssetRetirementObligation_11194"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_NuclearDecommissioningAssetRetirementObligationsAbstract_11193" xlink:to="Locator_exc_NetAdjustmentToNuclearAssetRetirementObligation_11194" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NuclearDecommissioningAssetRetirementObligationsAbstract" xlink:label="Locator_exc_NuclearDecommissioningAssetRetirementObligationsAbstract_11195"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NuclearAssetRetirementObligationRevisionOfEstimateZionStation" xlink:label="Locator_exc_NuclearAssetRetirementObligationRevisionOfEstimateZionStation_11196"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_NuclearDecommissioningAssetRetirementObligationsAbstract_11195" xlink:to="Locator_exc_NuclearAssetRetirementObligationRevisionOfEstimateZionStation_11196" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NuclearDecommissioningAssetRetirementObligationsAbstract" xlink:label="Locator_exc_NuclearDecommissioningAssetRetirementObligationsAbstract_11197"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PreTaxIncomeLossRecognizedFromNuclearAssetRetirementObligationAdjustment" xlink:label="Locator_exc_PreTaxIncomeLossRecognizedFromNuclearAssetRetirementObligationAdjustment_11198"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_NuclearDecommissioningAssetRetirementObligationsAbstract_11197" xlink:to="Locator_exc_PreTaxIncomeLossRecognizedFromNuclearAssetRetirementObligationAdjustment_11198" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ZionStationDecommissioningAbstract" xlink:label="Locator_exc_ZionStationDecommissioningAbstract_11209"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SpentNuclearFuelObligationZionsolutions" xlink:label="Locator_exc_SpentNuclearFuelObligationZionsolutions_11210"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_ZionStationDecommissioningAbstract_11209" xlink:to="Locator_exc_SpentNuclearFuelObligationZionsolutions_11210" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ZionStationDecommissioningAbstract" xlink:label="Locator_exc_ZionStationDecommissioningAbstract_11211"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AssetsHeldInTrustNoncurrent" xlink:label="Locator_us-gaap_AssetsHeldInTrustNoncurrent_11212"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_ZionStationDecommissioningAbstract_11211" xlink:to="Locator_us-gaap_AssetsHeldInTrustNoncurrent_11212" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ZionStationDecommissioningAbstract" xlink:label="Locator_exc_ZionStationDecommissioningAbstract_11213"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_GrossPayableToZionsolutions" xlink:label="Locator_exc_GrossPayableToZionsolutions_11214"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_ZionStationDecommissioningAbstract_11213" xlink:to="Locator_exc_GrossPayableToZionsolutions_11214" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ZionStationDecommissioningAbstract" xlink:label="Locator_exc_ZionStationDecommissioningAbstract_11215"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CurrentPayableToZionsolutions" xlink:label="Locator_exc_CurrentPayableToZionsolutions_11216"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_ZionStationDecommissioningAbstract_11215" xlink:to="Locator_exc_CurrentPayableToZionsolutions_11216" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ZionStationDecommissioningAbstract" xlink:label="Locator_exc_ZionStationDecommissioningAbstract_11217"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_WithdrawalFromNuclearDecommissioningFunds" xlink:label="Locator_exc_WithdrawalFromNuclearDecommissioningFunds_11218"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_ZionStationDecommissioningAbstract_11217" xlink:to="Locator_exc_WithdrawalFromNuclearDecommissioningFunds_11218" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ZionStationDecommissioningAbstract" xlink:label="Locator_exc_ZionStationDecommissioningAbstract_11219"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ZionsolutionsRentPayable" xlink:label="Locator_exc_ZionsolutionsRentPayable_11220"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_ZionStationDecommissioningAbstract_11219" xlink:to="Locator_exc_ZionsolutionsRentPayable_11220" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ZionStationDecommissioningAbstract" xlink:label="Locator_exc_ZionStationDecommissioningAbstract_11221"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EnergysolutionsLetterOfCredit" xlink:label="Locator_exc_EnergysolutionsLetterOfCredit_11222"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_ZionStationDecommissioningAbstract_11221" xlink:to="Locator_exc_EnergysolutionsLetterOfCredit_11222" order="7.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NrcMinimumFundingRequirementsAbstract" xlink:label="Locator_exc_NrcMinimumFundingRequirementsAbstract_11225"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AnnualAfterTaxReturnOnNuclearDecommissioningFund" xlink:label="Locator_exc_AnnualAfterTaxReturnOnNuclearDecommissioningFund_11226"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_NrcMinimumFundingRequirementsAbstract_11225" xlink:to="Locator_exc_AnnualAfterTaxReturnOnNuclearDecommissioningFund_11226" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NrcMinimumFundingRequirementsAbstract" xlink:label="Locator_exc_NrcMinimumFundingRequirementsAbstract_11227"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AnnualAfterTaxReturnOnNuclearDecommissioningFundFormerPecoUnits" xlink:label="Locator_exc_AnnualAfterTaxReturnOnNuclearDecommissioningFundFormerPecoUnits_11228"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_NrcMinimumFundingRequirementsAbstract_11227" xlink:to="Locator_exc_AnnualAfterTaxReturnOnNuclearDecommissioningFundFormerPecoUnits_11228" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NrcMinimumFundingRequirementsAbstract" xlink:label="Locator_exc_NrcMinimumFundingRequirementsAbstract_11229"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AnnualAverageAssetRetirementObligationAccretionPercent" xlink:label="Locator_exc_AnnualAverageAssetRetirementObligationAccretionPercent_11230"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_NrcMinimumFundingRequirementsAbstract_11229" xlink:to="Locator_exc_AnnualAverageAssetRetirementObligationAccretionPercent_11230" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NrcMinimumFundingRequirementsAbstract" xlink:label="Locator_exc_NrcMinimumFundingRequirementsAbstract_11231"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EstimatedAnnualAfterTaxReturnOnNuclearDecommissioningFundsLowerBound" xlink:label="Locator_exc_EstimatedAnnualAfterTaxReturnOnNuclearDecommissioningFundsLowerBound_11232"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_NrcMinimumFundingRequirementsAbstract_11231" xlink:to="Locator_exc_EstimatedAnnualAfterTaxReturnOnNuclearDecommissioningFundsLowerBound_11232" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NrcMinimumFundingRequirementsAbstract" xlink:label="Locator_exc_NrcMinimumFundingRequirementsAbstract_11233"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EstimatedAnnualAfterTaxReturnOnNuclearDecommissioningFundsUpperBound" xlink:label="Locator_exc_EstimatedAnnualAfterTaxReturnOnNuclearDecommissioningFundsUpperBound_11234"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_NrcMinimumFundingRequirementsAbstract_11233" xlink:to="Locator_exc_EstimatedAnnualAfterTaxReturnOnNuclearDecommissioningFundsUpperBound_11234" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NrcMinimumFundingRequirementsAbstract" xlink:label="Locator_exc_NrcMinimumFundingRequirementsAbstract_11235"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AnnualAverageAfterTaxReturnNuclearDecommissioningFundsHistorical" xlink:label="Locator_exc_AnnualAverageAfterTaxReturnNuclearDecommissioningFundsHistorical_11236"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_NrcMinimumFundingRequirementsAbstract_11235" xlink:to="Locator_exc_AnnualAverageAfterTaxReturnNuclearDecommissioningFundsHistorical_11236" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NrcMinimumFundingRequirementsAbstract" xlink:label="Locator_exc_NrcMinimumFundingRequirementsAbstract_11237"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NrcFundingAssuranceParentGuarantees" xlink:label="Locator_exc_NrcFundingAssuranceParentGuarantees_11238"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_NrcMinimumFundingRequirementsAbstract_11237" xlink:to="Locator_exc_NrcFundingAssuranceParentGuarantees_11238" order="7.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NrcMinimumFundingRequirementsAbstract" xlink:label="Locator_exc_NrcMinimumFundingRequirementsAbstract_11239"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AdditionalNrcFundingAssuranceParentGuarantees" xlink:label="Locator_exc_AdditionalNrcFundingAssuranceParentGuarantees_11240"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_NrcMinimumFundingRequirementsAbstract_11239" xlink:to="Locator_exc_AdditionalNrcFundingAssuranceParentGuarantees_11240" order="8.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NuclearDecommissioningTrustFundInvestmentsAbstract" xlink:label="Locator_exc_NuclearDecommissioningTrustFundInvestmentsAbstract_11201"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DecommissioningFundInvestments" xlink:label="Locator_us-gaap_DecommissioningFundInvestments_11202"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_NuclearDecommissioningTrustFundInvestmentsAbstract_11201" xlink:to="Locator_us-gaap_DecommissioningFundInvestments_11202" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NuclearDecommissioningTrustFundInvestmentsAbstract" xlink:label="Locator_exc_NuclearDecommissioningTrustFundInvestmentsAbstract_11203"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NuclearDecommissioningAnnualRecoveryProposed" xlink:label="Locator_exc_NuclearDecommissioningAnnualRecoveryProposed_11204"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_NuclearDecommissioningTrustFundInvestmentsAbstract_11203" xlink:to="Locator_exc_NuclearDecommissioningAnnualRecoveryProposed_11204" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NuclearDecommissioningTrustFundInvestmentsAbstract" xlink:label="Locator_exc_NuclearDecommissioningTrustFundInvestmentsAbstract_11205"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NuclearDecommissioningAnnualRecoveryCurrent" xlink:label="Locator_exc_NuclearDecommissioningAnnualRecoveryCurrent_11206"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_NuclearDecommissioningTrustFundInvestmentsAbstract_11205" xlink:to="Locator_exc_NuclearDecommissioningAnnualRecoveryCurrent_11206" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NuclearDecommissioningAssetRetirementObligationRollForwardAnalysisLineItems" xlink:label="Locator_exc_NuclearDecommissioningAssetRetirementObligationRollForwardAnalysisLineItems_11083"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NuclearDecommissioningAssetRetirementObligationRollForwardAnalysisTable" xlink:label="Locator_exc_NuclearDecommissioningAssetRetirementObligationRollForwardAnalysisTable_11084"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="Locator_exc_NuclearDecommissioningAssetRetirementObligationRollForwardAnalysisLineItems_11083" xlink:to="Locator_exc_NuclearDecommissioningAssetRetirementObligationRollForwardAnalysisTable_11084" order="0.5" xbrldt:contextElement="segment" xbrldt:closed="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NuclearDecommissioningAssetRetirementObligationRollForwardAnalysisTable" xlink:label="Locator_exc_NuclearDecommissioningAssetRetirementObligationRollForwardAnalysisTable_11155"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_11156"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_exc_NuclearDecommissioningAssetRetirementObligationRollForwardAnalysisTable_11155" xlink:to="Locator_dei_LegalEntityAxis_11156" order="0.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NuclearDecommissioningAssetRetirementObligationRollForwardAnalysisLineItems" xlink:label="Locator_exc_NuclearDecommissioningAssetRetirementObligationRollForwardAnalysisLineItems_11173"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NuclearDecommissioningAssetRetirementObligationAbstract" xlink:label="Locator_exc_NuclearDecommissioningAssetRetirementObligationAbstract_11174"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_NuclearDecommissioningAssetRetirementObligationRollForwardAnalysisLineItems_11173" xlink:to="Locator_exc_NuclearDecommissioningAssetRetirementObligationAbstract_11174" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NuclearDecommissioningAssetRetirementObligationAbstract" xlink:label="Locator_exc_NuclearDecommissioningAssetRetirementObligationAbstract_11175"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NuclearAssetRetirementObligation" xlink:label="Locator_exc_NuclearAssetRetirementObligation_11176"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_NuclearDecommissioningAssetRetirementObligationAbstract_11175" xlink:to="Locator_exc_NuclearAssetRetirementObligation_11176" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NuclearDecommissioningAssetRetirementObligationAbstract" xlink:label="Locator_exc_NuclearDecommissioningAssetRetirementObligationAbstract_11177"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NuclearAssetRetirementObligationAccretionExpense" xlink:label="Locator_exc_NuclearAssetRetirementObligationAccretionExpense_11178"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_NuclearDecommissioningAssetRetirementObligationAbstract_11177" xlink:to="Locator_exc_NuclearAssetRetirementObligationAccretionExpense_11178" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NuclearDecommissioningAssetRetirementObligationAbstract" xlink:label="Locator_exc_NuclearDecommissioningAssetRetirementObligationAbstract_11179"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NuclearAssetRetirementObligationRevisionOfEstimate" xlink:label="Locator_exc_NuclearAssetRetirementObligationRevisionOfEstimate_11180"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_NuclearDecommissioningAssetRetirementObligationAbstract_11179" xlink:to="Locator_exc_NuclearAssetRetirementObligationRevisionOfEstimate_11180" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NuclearDecommissioningAssetRetirementObligationAbstract" xlink:label="Locator_exc_NuclearDecommissioningAssetRetirementObligationAbstract_11181"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NuclearAssetRetirementObligationExtinguishment" xlink:label="Locator_exc_NuclearAssetRetirementObligationExtinguishment_11182"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_NuclearDecommissioningAssetRetirementObligationAbstract_11181" xlink:to="Locator_exc_NuclearAssetRetirementObligationExtinguishment_11182" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NuclearDecommissioningAssetRetirementObligationAbstract" xlink:label="Locator_exc_NuclearDecommissioningAssetRetirementObligationAbstract_11183"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NuclearAssetRetirementObligationLiabilitiesSettled" xlink:label="Locator_exc_NuclearAssetRetirementObligationLiabilitiesSettled_11184"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_NuclearDecommissioningAssetRetirementObligationAbstract_11183" xlink:to="Locator_exc_NuclearAssetRetirementObligationLiabilitiesSettled_11184" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NuclearDecommissioningAssetRetirementObligationRollForwardAnalysisLineItems" xlink:label="Locator_exc_NuclearDecommissioningAssetRetirementObligationRollForwardAnalysisLineItems_11185"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FootnotesToNuclearDecommissioningAssetRetirementObligationAbstract" xlink:label="Locator_exc_FootnotesToNuclearDecommissioningAssetRetirementObligationAbstract_11186"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_NuclearDecommissioningAssetRetirementObligationRollForwardAnalysisLineItems_11185" xlink:to="Locator_exc_FootnotesToNuclearDecommissioningAssetRetirementObligationAbstract_11186" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FootnotesToNuclearDecommissioningAssetRetirementObligationAbstract" xlink:label="Locator_exc_FootnotesToNuclearDecommissioningAssetRetirementObligationAbstract_11187"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AssetRetirementObligationCurrent" xlink:label="Locator_us-gaap_AssetRetirementObligationCurrent_11188"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FootnotesToNuclearDecommissioningAssetRetirementObligationAbstract_11187" xlink:to="Locator_us-gaap_AssetRetirementObligationCurrent_11188" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NuclearDecommissioningAdditionalNarrativeInformationLineItems" xlink:label="Locator_exc_NuclearDecommissioningAdditionalNarrativeInformationLineItems_11151"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NuclearDecommissioningAdditionalNarrativeInformationTable" xlink:label="Locator_exc_NuclearDecommissioningAdditionalNarrativeInformationTable_11152"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="Locator_exc_NuclearDecommissioningAdditionalNarrativeInformationLineItems_11151" xlink:to="Locator_exc_NuclearDecommissioningAdditionalNarrativeInformationTable_11152" order="0.5" xbrldt:contextElement="segment" xbrldt:closed="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NuclearDecommissioningAdditionalNarrativeInformationTable" xlink:label="Locator_exc_NuclearDecommissioningAdditionalNarrativeInformationTable_11157"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_11158"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_exc_NuclearDecommissioningAdditionalNarrativeInformationTable_11157" xlink:to="Locator_dei_LegalEntityAxis_11158" order="0.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NuclearDecommissioningAdditionalNarrativeInformationLineItems" xlink:label="Locator_exc_NuclearDecommissioningAdditionalNarrativeInformationLineItems_11189"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NuclearDecommissioningAssetRetirementObligationsAbstract" xlink:label="Locator_exc_NuclearDecommissioningAssetRetirementObligationsAbstract_11190"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_NuclearDecommissioningAdditionalNarrativeInformationLineItems_11189" xlink:to="Locator_exc_NuclearDecommissioningAssetRetirementObligationsAbstract_11190" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NuclearDecommissioningAdditionalNarrativeInformationLineItems" xlink:label="Locator_exc_NuclearDecommissioningAdditionalNarrativeInformationLineItems_11199"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NuclearDecommissioningTrustFundInvestmentsAbstract" xlink:label="Locator_exc_NuclearDecommissioningTrustFundInvestmentsAbstract_11200"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_NuclearDecommissioningAdditionalNarrativeInformationLineItems_11199" xlink:to="Locator_exc_NuclearDecommissioningTrustFundInvestmentsAbstract_11200" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NuclearDecommissioningAdditionalNarrativeInformationLineItems" xlink:label="Locator_exc_NuclearDecommissioningAdditionalNarrativeInformationLineItems_11207"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ZionStationDecommissioningAbstract" xlink:label="Locator_exc_ZionStationDecommissioningAbstract_11208"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_NuclearDecommissioningAdditionalNarrativeInformationLineItems_11207" xlink:to="Locator_exc_ZionStationDecommissioningAbstract_11208" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NuclearDecommissioningAdditionalNarrativeInformationLineItems" xlink:label="Locator_exc_NuclearDecommissioningAdditionalNarrativeInformationLineItems_11223"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NrcMinimumFundingRequirementsAbstract" xlink:label="Locator_exc_NrcMinimumFundingRequirementsAbstract_11224"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_NuclearDecommissioningAdditionalNarrativeInformationLineItems_11223" xlink:to="Locator_exc_NrcMinimumFundingRequirementsAbstract_11224" order="4.0" xbrldt:usable="true"/> |
| | </definitionLink> |
| <definitionLink xlink:type="extended" xlink:role="http://exeloncorp.com/role/DisclosureSubsequentEventDetails"> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_11275"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_11276"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_dei_LegalEntityAxis_11275" xlink:to="Locator_dei_EntityDomain_11276" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_11277"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PecoEnergyCoMember" xlink:label="Locator_exc_PecoEnergyCoMember_11278"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_11277" xlink:to="Locator_exc_PecoEnergyCoMember_11278" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_11279"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BaltimoreGasAndElectricCompanyMember" xlink:label="Locator_exc_BaltimoreGasAndElectricCompanyMember_11280"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_11279" xlink:to="Locator_exc_BaltimoreGasAndElectricCompanyMember_11280" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SubsequentEventsLineItems" xlink:label="Locator_exc_SubsequentEventsLineItems_11261"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SubsequentEventsTable" xlink:label="Locator_exc_SubsequentEventsTable_11262"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="Locator_exc_SubsequentEventsLineItems_11261" xlink:to="Locator_exc_SubsequentEventsTable_11262" order="0.5" xbrldt:contextElement="segment" xbrldt:closed="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SubsequentEventsTable" xlink:label="Locator_exc_SubsequentEventsTable_11273"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_11274"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_exc_SubsequentEventsTable_11273" xlink:to="Locator_dei_LegalEntityAxis_11274" order="0.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SubsequentEventsLineItems" xlink:label="Locator_exc_SubsequentEventsLineItems_11281"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_StormDamageImpactAbstract" xlink:label="Locator_exc_StormDamageImpactAbstract_11282"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_SubsequentEventsLineItems_11281" xlink:to="Locator_exc_StormDamageImpactAbstract_11282" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_StormDamageImpactAbstract" xlink:label="Locator_exc_StormDamageImpactAbstract_11283"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CustomersImpactedFromStormDamage" xlink:label="Locator_exc_CustomersImpactedFromStormDamage_11284"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_StormDamageImpactAbstract_11283" xlink:to="Locator_exc_CustomersImpactedFromStormDamage_11284" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_StormDamageImpactAbstract" xlink:label="Locator_exc_StormDamageImpactAbstract_11285"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_LowEndIncrementalOperatingAndMaintenanceExpenseFromStormDamage" xlink:label="Locator_exc_LowEndIncrementalOperatingAndMaintenanceExpenseFromStormDamage_11286"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_StormDamageImpactAbstract_11285" xlink:to="Locator_exc_LowEndIncrementalOperatingAndMaintenanceExpenseFromStormDamage_11286" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_StormDamageImpactAbstract" xlink:label="Locator_exc_StormDamageImpactAbstract_11287"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_HighEndIncrementalOperatingAndMaintenanceExpenseFromStormDamage" xlink:label="Locator_exc_HighEndIncrementalOperatingAndMaintenanceExpenseFromStormDamage_11288"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_StormDamageImpactAbstract_11287" xlink:to="Locator_exc_HighEndIncrementalOperatingAndMaintenanceExpenseFromStormDamage_11288" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_StormDamageImpactAbstract" xlink:label="Locator_exc_StormDamageImpactAbstract_11289"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_LowEndIncrementalCapitalExpendituresFromStormDamage" xlink:label="Locator_exc_LowEndIncrementalCapitalExpendituresFromStormDamage_11290"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_StormDamageImpactAbstract_11289" xlink:to="Locator_exc_LowEndIncrementalCapitalExpendituresFromStormDamage_11290" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_StormDamageImpactAbstract" xlink:label="Locator_exc_StormDamageImpactAbstract_11291"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_HighEndIncrementalCapitalExpendituresFromStormDamage" xlink:label="Locator_exc_HighEndIncrementalCapitalExpendituresFromStormDamage_11292"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_StormDamageImpactAbstract_11291" xlink:to="Locator_exc_HighEndIncrementalCapitalExpendituresFromStormDamage_11292" order="4.0" xbrldt:usable="true"/> |
| | </definitionLink> |
| <definitionLink xlink:type="extended" xlink:role="http://exeloncorp.com/role/SubsequentEventsExelonPECOAndBGE"> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_11309"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_11310"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_dei_LegalEntityAxis_11309" xlink:to="Locator_dei_EntityDomain_11310" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_11311"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PecoEnergyCoMember" xlink:label="Locator_exc_PecoEnergyCoMember_11312"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_11311" xlink:to="Locator_exc_PecoEnergyCoMember_11312" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_11313"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BaltimoreGasAndElectricCompanyMember" xlink:label="Locator_exc_BaltimoreGasAndElectricCompanyMember_11314"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_11313" xlink:to="Locator_exc_BaltimoreGasAndElectricCompanyMember_11314" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SubsequentEventsDisclosureLineItems" xlink:label="Locator_exc_SubsequentEventsDisclosureLineItems_11305"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SubsequentEventDisclosureTable" xlink:label="Locator_exc_SubsequentEventDisclosureTable_11306"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="Locator_exc_SubsequentEventsDisclosureLineItems_11305" xlink:to="Locator_exc_SubsequentEventDisclosureTable_11306" order="0.5" xbrldt:contextElement="segment" xbrldt:closed="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SubsequentEventDisclosureTable" xlink:label="Locator_exc_SubsequentEventDisclosureTable_11307"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_11308"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_exc_SubsequentEventDisclosureTable_11307" xlink:to="Locator_dei_LegalEntityAxis_11308" order="0.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SubsequentEventsDisclosureLineItems" xlink:label="Locator_exc_SubsequentEventsDisclosureLineItems_11315"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScheduleOfSubsequentEventsTextBlock" xlink:label="Locator_us-gaap_ScheduleOfSubsequentEventsTextBlock_11316"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_SubsequentEventsDisclosureLineItems_11315" xlink:to="Locator_us-gaap_ScheduleOfSubsequentEventsTextBlock_11316" order="1.0" xbrldt:usable="true"/> |
| | </definitionLink> |
| <definitionLink xlink:type="extended" xlink:role="http://exeloncorp.com/role/DisclosureInvestmentInConstellationEnergyNuclearGroupLLCExelonAndGeneration"> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_11333"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_11334"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_dei_LegalEntityAxis_11333" xlink:to="Locator_dei_EntityDomain_11334" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_11335"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ExelonGenerationCoLLCMember" xlink:label="Locator_exc_ExelonGenerationCoLLCMember_11336"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_11335" xlink:to="Locator_exc_ExelonGenerationCoLLCMember_11336" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EquityMethodInvestmentsAndJointVenturesLineItems" xlink:label="Locator_exc_EquityMethodInvestmentsAndJointVenturesLineItems_11329"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EquityMethodInvestmentsAndJointVenturesTable" xlink:label="Locator_exc_EquityMethodInvestmentsAndJointVenturesTable_11330"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="Locator_exc_EquityMethodInvestmentsAndJointVenturesLineItems_11329" xlink:to="Locator_exc_EquityMethodInvestmentsAndJointVenturesTable_11330" order="0.5" xbrldt:contextElement="segment" xbrldt:closed="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EquityMethodInvestmentsAndJointVenturesTable" xlink:label="Locator_exc_EquityMethodInvestmentsAndJointVenturesTable_11331"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_11332"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_exc_EquityMethodInvestmentsAndJointVenturesTable_11331" xlink:to="Locator_dei_LegalEntityAxis_11332" order="0.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EquityMethodInvestmentsAndJointVenturesLineItems" xlink:label="Locator_exc_EquityMethodInvestmentsAndJointVenturesLineItems_11337"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_EquityMethodInvestmentsDisclosureTextBlock" xlink:label="Locator_us-gaap_EquityMethodInvestmentsDisclosureTextBlock_11338"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_EquityMethodInvestmentsAndJointVenturesLineItems_11337" xlink:to="Locator_us-gaap_EquityMethodInvestmentsDisclosureTextBlock_11338" order="1.0" xbrldt:usable="true"/> |
| | </definitionLink> |
| <definitionLink xlink:type="extended" xlink:role="http://exeloncorp.com/role/DisclosureInvestmentInConstellationEnergyNuclearGroupLLCTables"> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_11355"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_11356"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_dei_LegalEntityAxis_11355" xlink:to="Locator_dei_EntityDomain_11356" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_11357"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ExelonGenerationCoLLCMember" xlink:label="Locator_exc_ExelonGenerationCoLLCMember_11358"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_11357" xlink:to="Locator_exc_ExelonGenerationCoLLCMember_11358" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EquityMethodInvestmentsAndJointVenturesTablesLineItems" xlink:label="Locator_exc_EquityMethodInvestmentsAndJointVenturesTablesLineItems_11351"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EquityMethodInvestmentsAndJointVenturesTablesTable" xlink:label="Locator_exc_EquityMethodInvestmentsAndJointVenturesTablesTable_11352"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="Locator_exc_EquityMethodInvestmentsAndJointVenturesTablesLineItems_11351" xlink:to="Locator_exc_EquityMethodInvestmentsAndJointVenturesTablesTable_11352" order="0.5" xbrldt:contextElement="segment" xbrldt:closed="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EquityMethodInvestmentsAndJointVenturesTablesTable" xlink:label="Locator_exc_EquityMethodInvestmentsAndJointVenturesTablesTable_11353"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_11354"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_exc_EquityMethodInvestmentsAndJointVenturesTablesTable_11353" xlink:to="Locator_dei_LegalEntityAxis_11354" order="0.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EquityMethodInvestmentsAndJointVenturesTablesLineItems" xlink:label="Locator_exc_EquityMethodInvestmentsAndJointVenturesTablesLineItems_11359"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ScheduleOfIncomeLossFromEquityMethodInvestmentsTextBlock" xlink:label="Locator_exc_ScheduleOfIncomeLossFromEquityMethodInvestmentsTextBlock_11360"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_EquityMethodInvestmentsAndJointVenturesTablesLineItems_11359" xlink:to="Locator_exc_ScheduleOfIncomeLossFromEquityMethodInvestmentsTextBlock_11360" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EquityMethodInvestmentsAndJointVenturesTablesLineItems" xlink:label="Locator_exc_EquityMethodInvestmentsAndJointVenturesTablesLineItems_11361"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ScheduleOfEquityMethodInvestmentSummarizedFinancialInformationTextBlock" xlink:label="Locator_exc_ScheduleOfEquityMethodInvestmentSummarizedFinancialInformationTextBlock_11362"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_EquityMethodInvestmentsAndJointVenturesTablesLineItems_11361" xlink:to="Locator_exc_ScheduleOfEquityMethodInvestmentSummarizedFinancialInformationTextBlock_11362" order="2.0" xbrldt:usable="true"/> |
| | </definitionLink> |
| <definitionLink xlink:type="extended" xlink:role="http://exeloncorp.com/role/InvestmentInConstellationEnergyNuclearGroupLLCDetails"> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_11425"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_11426"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_dei_LegalEntityAxis_11425" xlink:to="Locator_dei_EntityDomain_11426" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_11427"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ExelonGenerationCoLLCMember" xlink:label="Locator_exc_ExelonGenerationCoLLCMember_11428"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_11427" xlink:to="Locator_exc_ExelonGenerationCoLLCMember_11428" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis" xlink:label="Locator_us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_11443"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_EquityMethodInvesteeNameDomain" xlink:label="Locator_us-gaap_EquityMethodInvesteeNameDomain_11444"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_11443" xlink:to="Locator_us-gaap_EquityMethodInvesteeNameDomain_11444" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_EquityMethodInvesteeNameDomain" xlink:label="Locator_us-gaap_EquityMethodInvesteeNameDomain_11445"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CengMember" xlink:label="Locator_exc_CengMember_11446"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_EquityMethodInvesteeNameDomain_11445" xlink:to="Locator_exc_CengMember_11446" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_EquityMethodInvesteeNameDomain" xlink:label="Locator_us-gaap_EquityMethodInvesteeNameDomain_11447"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_UneMember" xlink:label="Locator_exc_UneMember_11448"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_EquityMethodInvesteeNameDomain_11447" xlink:to="Locator_exc_UneMember_11448" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_EquityMethodInvesteeNameDomain" xlink:label="Locator_us-gaap_EquityMethodInvesteeNameDomain_11449"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ShippingJvMember" xlink:label="Locator_exc_ShippingJvMember_11450"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_EquityMethodInvesteeNameDomain_11449" xlink:to="Locator_exc_ShippingJvMember_11450" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_EquityMethodInvesteeNameDomain" xlink:label="Locator_us-gaap_EquityMethodInvesteeNameDomain_11451"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CepMember" xlink:label="Locator_exc_CepMember_11452"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_EquityMethodInvesteeNameDomain_11451" xlink:to="Locator_exc_CepMember_11452" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_EquityMethodInvesteeNameDomain" xlink:label="Locator_us-gaap_EquityMethodInvesteeNameDomain_11453"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_QualifyingFacilitiesAndDomesticPowerProjectsMember" xlink:label="Locator_exc_QualifyingFacilitiesAndDomesticPowerProjectsMember_11454"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_EquityMethodInvesteeNameDomain_11453" xlink:to="Locator_exc_QualifyingFacilitiesAndDomesticPowerProjectsMember_11454" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:label="Locator_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_11415"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_11416"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_11415" xlink:to="Locator_dei_LegalEntityAxis_11416" order="0.0"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:label="Locator_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_11417"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PurchaseAgreementAxis" xlink:label="Locator_exc_PurchaseAgreementAxis_11418"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_11417" xlink:to="Locator_exc_PurchaseAgreementAxis_11418" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PurchaseAgreementAxis" xlink:label="Locator_exc_PurchaseAgreementAxis_11371"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PurchaseAgreementDomain" xlink:label="Locator_exc_PurchaseAgreementDomain_11372"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="Locator_exc_PurchaseAgreementAxis_11371" xlink:to="Locator_exc_PurchaseAgreementDomain_11372" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PurchaseAgreementAxis" xlink:label="Locator_exc_PurchaseAgreementAxis_11435"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PurchaseAgreementDomain" xlink:label="Locator_exc_PurchaseAgreementDomain_11436"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_exc_PurchaseAgreementAxis_11435" xlink:to="Locator_exc_PurchaseAgreementDomain_11436" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PurchaseAgreementDomain" xlink:label="Locator_exc_PurchaseAgreementDomain_11437"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PowerPurchaseAgreementMember" xlink:label="Locator_exc_PowerPurchaseAgreementMember_11438"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_PurchaseAgreementDomain_11437" xlink:to="Locator_exc_PowerPurchaseAgreementMember_11438" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PurchaseAgreementDomain" xlink:label="Locator_exc_PurchaseAgreementDomain_11439"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PowerServiceAgencyAgreementMember" xlink:label="Locator_exc_PowerServiceAgencyAgreementMember_11440"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_PurchaseAgreementDomain_11439" xlink:to="Locator_exc_PowerServiceAgencyAgreementMember_11440" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PurchaseAgreementDomain" xlink:label="Locator_exc_PurchaseAgreementDomain_11441"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AdministrativeServicesAgreementMember" xlink:label="Locator_exc_AdministrativeServicesAgreementMember_11442"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_PurchaseAgreementDomain_11441" xlink:to="Locator_exc_AdministrativeServicesAgreementMember_11442" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:label="Locator_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_11419"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RangeAxis" xlink:label="Locator_us-gaap_RangeAxis_11420"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_11419" xlink:to="Locator_us-gaap_RangeAxis_11420" order="2.0"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RangeAxis" xlink:label="Locator_us-gaap_RangeAxis_11429"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RangeMember" xlink:label="Locator_us-gaap_RangeMember_11430"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_us-gaap_RangeAxis_11429" xlink:to="Locator_us-gaap_RangeMember_11430" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RangeMember" xlink:label="Locator_us-gaap_RangeMember_11433"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_MaximumMember" xlink:label="Locator_us-gaap_MaximumMember_11434"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RangeMember_11433" xlink:to="Locator_us-gaap_MaximumMember_11434" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RangeMember" xlink:label="Locator_us-gaap_RangeMember_11431"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_MinimumMember" xlink:label="Locator_us-gaap_MinimumMember_11432"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RangeMember_11431" xlink:to="Locator_us-gaap_MinimumMember_11432" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RelatedPartyTransactionLineItems" xlink:label="Locator_us-gaap_RelatedPartyTransactionLineItems_11393"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:label="Locator_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_11394"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="Locator_us-gaap_RelatedPartyTransactionLineItems_11393" xlink:to="Locator_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_11394" order="0.5" xbrldt:contextElement="segment" xbrldt:closed="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RelatedPartyTransactionLineItems" xlink:label="Locator_us-gaap_RelatedPartyTransactionLineItems_11455"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RelatedPartyTransactionRequiredPurchaseOfPowerPercentage" xlink:label="Locator_exc_RelatedPartyTransactionRequiredPurchaseOfPowerPercentage_11456"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RelatedPartyTransactionLineItems_11455" xlink:to="Locator_exc_RelatedPartyTransactionRequiredPurchaseOfPowerPercentage_11456" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RelatedPartyTransactionLineItems" xlink:label="Locator_us-gaap_RelatedPartyTransactionLineItems_11457"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RelatedPartyPurchaseOfNuclearOutputPercentage" xlink:label="Locator_exc_RelatedPartyPurchaseOfNuclearOutputPercentage_11458"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RelatedPartyTransactionLineItems_11457" xlink:to="Locator_exc_RelatedPartyPurchaseOfNuclearOutputPercentage_11458" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RelatedPartyTransactionLineItems" xlink:label="Locator_us-gaap_RelatedPartyTransactionLineItems_11459"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RelatedPartyPurchaseOfNuclearOutputByThirdPartyPercentage" xlink:label="Locator_exc_RelatedPartyPurchaseOfNuclearOutputByThirdPartyPercentage_11460"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RelatedPartyTransactionLineItems_11459" xlink:to="Locator_exc_RelatedPartyPurchaseOfNuclearOutputByThirdPartyPercentage_11460" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RelatedPartyTransactionLineItems" xlink:label="Locator_us-gaap_RelatedPartyTransactionLineItems_11461"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RelatedPartyTransactionMaximumCostOfServicePerMonth" xlink:label="Locator_exc_RelatedPartyTransactionMaximumCostOfServicePerMonth_11462"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RelatedPartyTransactionLineItems_11461" xlink:to="Locator_exc_RelatedPartyTransactionMaximumCostOfServicePerMonth_11462" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RelatedPartyTransactionLineItems" xlink:label="Locator_us-gaap_RelatedPartyTransactionLineItems_11463"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ImpactOfTransactionsUnderAgreementsAbstract" xlink:label="Locator_exc_ImpactOfTransactionsUnderAgreementsAbstract_11464"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RelatedPartyTransactionLineItems_11463" xlink:to="Locator_exc_ImpactOfTransactionsUnderAgreementsAbstract_11464" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ImpactOfTransactionsUnderAgreementsAbstract" xlink:label="Locator_exc_ImpactOfTransactionsUnderAgreementsAbstract_11465"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RelatedPartyTransactionRevenuesFromTransactionsWithRelatedParty" xlink:label="Locator_us-gaap_RelatedPartyTransactionRevenuesFromTransactionsWithRelatedParty_11466"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_ImpactOfTransactionsUnderAgreementsAbstract_11465" xlink:to="Locator_us-gaap_RelatedPartyTransactionRevenuesFromTransactionsWithRelatedParty_11466" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ImpactOfTransactionsUnderAgreementsAbstract" xlink:label="Locator_exc_ImpactOfTransactionsUnderAgreementsAbstract_11467"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RelatedPartyTransactionDueFromToRelatedParty" xlink:label="Locator_us-gaap_RelatedPartyTransactionDueFromToRelatedParty_11468"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_ImpactOfTransactionsUnderAgreementsAbstract_11467" xlink:to="Locator_us-gaap_RelatedPartyTransactionDueFromToRelatedParty_11468" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RelatedPartyTransactionLineItems" xlink:label="Locator_us-gaap_RelatedPartyTransactionLineItems_11469"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DebtInstrumentIncreaseAdditionalBorrowings" xlink:label="Locator_us-gaap_DebtInstrumentIncreaseAdditionalBorrowings_11470"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RelatedPartyTransactionLineItems_11469" xlink:to="Locator_us-gaap_DebtInstrumentIncreaseAdditionalBorrowings_11470" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RelatedPartyTransactionLineItems" xlink:label="Locator_us-gaap_RelatedPartyTransactionLineItems_11471"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PercentageOfRequestForBorrowingsToBeSubmittedToEntity" xlink:label="Locator_exc_PercentageOfRequestForBorrowingsToBeSubmittedToEntity_11472"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RelatedPartyTransactionLineItems_11471" xlink:to="Locator_exc_PercentageOfRequestForBorrowingsToBeSubmittedToEntity_11472" order="7.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RelatedPartyTransactionLineItems" xlink:label="Locator_us-gaap_RelatedPartyTransactionLineItems_11473"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PercentageOfRequestForBorrowingsToBeSubmittedToEntitysSubsidiary" xlink:label="Locator_exc_PercentageOfRequestForBorrowingsToBeSubmittedToEntitysSubsidiary_11474"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RelatedPartyTransactionLineItems_11473" xlink:to="Locator_exc_PercentageOfRequestForBorrowingsToBeSubmittedToEntitysSubsidiary_11474" order="8.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RelatedPartyTransactionLineItems" xlink:label="Locator_us-gaap_RelatedPartyTransactionLineItems_11475"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EnergyContractAmortization" xlink:label="Locator_exc_EnergyContractAmortization_11476"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RelatedPartyTransactionLineItems_11475" xlink:to="Locator_exc_EnergyContractAmortization_11476" order="9.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RelatedPartyTransactionLineItems" xlink:label="Locator_us-gaap_RelatedPartyTransactionLineItems_11477"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DebtInstrumentBasisSpreadOnVariableRate" xlink:label="Locator_us-gaap_DebtInstrumentBasisSpreadOnVariableRate_11478"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RelatedPartyTransactionLineItems_11477" xlink:to="Locator_us-gaap_DebtInstrumentBasisSpreadOnVariableRate_11478" order="10.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScheduleOfEquityMethodInvestmentsLineItems" xlink:label="Locator_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_11409"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScheduleOfEquityMethodInvestmentsTable" xlink:label="Locator_us-gaap_ScheduleOfEquityMethodInvestmentsTable_11410"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="Locator_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_11409" xlink:to="Locator_us-gaap_ScheduleOfEquityMethodInvestmentsTable_11410" order="0.5" xbrldt:contextElement="segment" xbrldt:closed="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScheduleOfEquityMethodInvestmentsTable" xlink:label="Locator_us-gaap_ScheduleOfEquityMethodInvestmentsTable_11421"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_11422"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_us-gaap_ScheduleOfEquityMethodInvestmentsTable_11421" xlink:to="Locator_dei_LegalEntityAxis_11422" order="0.0"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScheduleOfEquityMethodInvestmentsTable" xlink:label="Locator_us-gaap_ScheduleOfEquityMethodInvestmentsTable_11423"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis" xlink:label="Locator_us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_11424"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_us-gaap_ScheduleOfEquityMethodInvestmentsTable_11423" xlink:to="Locator_us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_11424" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScheduleOfEquityMethodInvestmentsLineItems" xlink:label="Locator_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_11479"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_EquityMethodInvestmentOwnershipPercentage" xlink:label="Locator_us-gaap_EquityMethodInvestmentOwnershipPercentage_11480"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_11479" xlink:to="Locator_us-gaap_EquityMethodInvestmentOwnershipPercentage_11480" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScheduleOfEquityMethodInvestmentsLineItems" xlink:label="Locator_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_11481"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_IncomeLossFromEquityMethodInvestmentsBeforeAmortizationOfBasisDifferenceInAffiliatePreTax" xlink:label="Locator_exc_IncomeLossFromEquityMethodInvestmentsBeforeAmortizationOfBasisDifferenceInAffiliatePreTax_11482"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_11481" xlink:to="Locator_exc_IncomeLossFromEquityMethodInvestmentsBeforeAmortizationOfBasisDifferenceInAffiliatePreTax_11482" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScheduleOfEquityMethodInvestmentsLineItems" xlink:label="Locator_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_11483"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AmortizationOfBasisDifferenceInInvestmentInAffiliatePreTax" xlink:label="Locator_exc_AmortizationOfBasisDifferenceInInvestmentInAffiliatePreTax_11484"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_11483" xlink:to="Locator_exc_AmortizationOfBasisDifferenceInInvestmentInAffiliatePreTax_11484" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScheduleOfEquityMethodInvestmentsLineItems" xlink:label="Locator_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_11485"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_IncomeLossFromEquityMethodInvestmentInAffiliate" xlink:label="Locator_exc_IncomeLossFromEquityMethodInvestmentInAffiliate_11486"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_11485" xlink:to="Locator_exc_IncomeLossFromEquityMethodInvestmentInAffiliate_11486" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScheduleOfEquityMethodInvestmentsLineItems" xlink:label="Locator_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_11487"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AggregateAmortizationOfBasisDifferenceInInvestmentInAffiliate" xlink:label="Locator_exc_AggregateAmortizationOfBasisDifferenceInInvestmentInAffiliate_11488"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_11487" xlink:to="Locator_exc_AggregateAmortizationOfBasisDifferenceInInvestmentInAffiliate_11488" order="5.0" xbrldt:usable="true"/> |
| | </definitionLink> |
| <definitionLink xlink:type="extended" xlink:role="http://exeloncorp.com/role/DisclosureBasisOfPresentationTables"> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_VariableInterestEntityLineItems" xlink:label="Locator_us-gaap_VariableInterestEntityLineItems_11537"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScheduleOfVariableInterestEntitiesTable" xlink:label="Locator_us-gaap_ScheduleOfVariableInterestEntitiesTable_11538"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="Locator_us-gaap_VariableInterestEntityLineItems_11537" xlink:to="Locator_us-gaap_ScheduleOfVariableInterestEntitiesTable_11538" order="0.5" xbrldt:contextElement="segment" xbrldt:closed="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScheduleOfVariableInterestEntitiesTable" xlink:label="Locator_us-gaap_ScheduleOfVariableInterestEntitiesTable_11539"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis" xlink:label="Locator_us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis_11540"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_us-gaap_ScheduleOfVariableInterestEntitiesTable_11539" xlink:to="Locator_us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis_11540" order="0.0"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis" xlink:label="Locator_us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis_11541"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ClassificationOfVariableInterestEntityDomain" xlink:label="Locator_us-gaap_ClassificationOfVariableInterestEntityDomain_11542"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis_11541" xlink:to="Locator_us-gaap_ClassificationOfVariableInterestEntityDomain_11542" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ClassificationOfVariableInterestEntityDomain" xlink:label="Locator_us-gaap_ClassificationOfVariableInterestEntityDomain_11543"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_VariableInterestEntityPrimaryBeneficiaryAggregatedDisclosureMember" xlink:label="Locator_us-gaap_VariableInterestEntityPrimaryBeneficiaryAggregatedDisclosureMember_11544"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_ClassificationOfVariableInterestEntityDomain_11543" xlink:to="Locator_us-gaap_VariableInterestEntityPrimaryBeneficiaryAggregatedDisclosureMember_11544" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ClassificationOfVariableInterestEntityDomain" xlink:label="Locator_us-gaap_ClassificationOfVariableInterestEntityDomain_11545"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_VariableInterestEntityNotPrimaryBeneficiaryAggregatedDisclosureMember" xlink:label="Locator_us-gaap_VariableInterestEntityNotPrimaryBeneficiaryAggregatedDisclosureMember_11546"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_ClassificationOfVariableInterestEntityDomain_11545" xlink:to="Locator_us-gaap_VariableInterestEntityNotPrimaryBeneficiaryAggregatedDisclosureMember_11546" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_VariableInterestEntityLineItems" xlink:label="Locator_us-gaap_VariableInterestEntityLineItems_11547"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScheduleOfVariableInterestEntitiesTextBlock" xlink:label="Locator_us-gaap_ScheduleOfVariableInterestEntitiesTextBlock_11548"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_VariableInterestEntityLineItems_11547" xlink:to="Locator_us-gaap_ScheduleOfVariableInterestEntitiesTextBlock_11548" order="1.0" xbrldt:usable="true"/> |
| | </definitionLink> |
| <definitionLink xlink:type="extended" xlink:role="http://exeloncorp.com/role/DisclosureFairValueOfFinancialAssetsAndLiabilitiesFairValueInputsAssetsQuantitativeInformationDetails"> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_11611"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_11612"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_dei_LegalEntityAxis_11611" xlink:to="Locator_dei_EntityDomain_11612" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_11613"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ExelonGenerationCoLLCMember" xlink:label="Locator_exc_ExelonGenerationCoLLCMember_11614"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_11613" xlink:to="Locator_exc_ExelonGenerationCoLLCMember_11614" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_11615"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CommonwealthEdisonCoMember" xlink:label="Locator_exc_CommonwealthEdisonCoMember_11616"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_11615" xlink:to="Locator_exc_CommonwealthEdisonCoMember_11616" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:label="Locator_us-gaap_FairValueByFairValueHierarchyLevelAxis_11561"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="Locator_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_11562"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="Locator_us-gaap_FairValueByFairValueHierarchyLevelAxis_11561" xlink:to="Locator_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_11562" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:label="Locator_us-gaap_FairValueByFairValueHierarchyLevelAxis_11631"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="Locator_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_11632"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_us-gaap_FairValueByFairValueHierarchyLevelAxis_11631" xlink:to="Locator_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_11632" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="Locator_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_11633"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FairValueInputsLevel1Member" xlink:label="Locator_us-gaap_FairValueInputsLevel1Member_11634"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_11633" xlink:to="Locator_us-gaap_FairValueInputsLevel1Member_11634" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="Locator_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_11635"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FairValueInputsLevel2Member" xlink:label="Locator_us-gaap_FairValueInputsLevel2Member_11636"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_11635" xlink:to="Locator_us-gaap_FairValueInputsLevel2Member_11636" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="Locator_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_11637"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FairValueInputsLevel3Member" xlink:label="Locator_us-gaap_FairValueInputsLevel3Member_11638"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_11637" xlink:to="Locator_us-gaap_FairValueInputsLevel3Member_11638" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RangeAxis" xlink:label="Locator_us-gaap_RangeAxis_11625"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RangeMember" xlink:label="Locator_us-gaap_RangeMember_11626"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_us-gaap_RangeAxis_11625" xlink:to="Locator_us-gaap_RangeMember_11626" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RangeMember" xlink:label="Locator_us-gaap_RangeMember_11629"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_MaximumMember" xlink:label="Locator_us-gaap_MaximumMember_11630"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RangeMember_11629" xlink:to="Locator_us-gaap_MaximumMember_11630" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RangeMember" xlink:label="Locator_us-gaap_RangeMember_11627"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_MinimumMember" xlink:label="Locator_us-gaap_MinimumMember_11628"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RangeMember_11627" xlink:to="Locator_us-gaap_MinimumMember_11628" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DerivativeByNatureAxis" xlink:label="Locator_us-gaap_DerivativeByNatureAxis_11559"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DerivativeNameDomain" xlink:label="Locator_us-gaap_DerivativeNameDomain_11560"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="Locator_us-gaap_DerivativeByNatureAxis_11559" xlink:to="Locator_us-gaap_DerivativeNameDomain_11560" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DerivativeByNatureAxis" xlink:label="Locator_us-gaap_DerivativeByNatureAxis_11617"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DerivativeNameDomain" xlink:label="Locator_us-gaap_DerivativeNameDomain_11618"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_us-gaap_DerivativeByNatureAxis_11617" xlink:to="Locator_us-gaap_DerivativeNameDomain_11618" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DerivativeNameDomain" xlink:label="Locator_us-gaap_DerivativeNameDomain_11623"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BusinessIntersegmentTransactionsMember" xlink:label="Locator_exc_BusinessIntersegmentTransactionsMember_11624"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DerivativeNameDomain_11623" xlink:to="Locator_exc_BusinessIntersegmentTransactionsMember_11624" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DerivativeNameDomain" xlink:label="Locator_us-gaap_DerivativeNameDomain_11619"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DerivativeMember" xlink:label="Locator_us-gaap_DerivativeMember_11620"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DerivativeNameDomain_11619" xlink:to="Locator_us-gaap_DerivativeMember_11620" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DerivativeNameDomain" xlink:label="Locator_us-gaap_DerivativeNameDomain_11621"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ProprietaryTradingMember" xlink:label="Locator_exc_ProprietaryTradingMember_11622"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DerivativeNameDomain_11621" xlink:to="Locator_exc_ProprietaryTradingMember_11622" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DerivativesFairValueLineItems" xlink:label="Locator_us-gaap_DerivativesFairValueLineItems_11577"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueInputsAssetsQuantitativeInformationTable" xlink:label="Locator_exc_FairValueInputsAssetsQuantitativeInformationTable_11578"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="Locator_us-gaap_DerivativesFairValueLineItems_11577" xlink:to="Locator_exc_FairValueInputsAssetsQuantitativeInformationTable_11578" order="0.5" xbrldt:contextElement="segment" xbrldt:closed="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueInputsAssetsQuantitativeInformationTable" xlink:label="Locator_exc_FairValueInputsAssetsQuantitativeInformationTable_11601"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_11602"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_exc_FairValueInputsAssetsQuantitativeInformationTable_11601" xlink:to="Locator_dei_LegalEntityAxis_11602" order="0.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueInputsAssetsQuantitativeInformationTable" xlink:label="Locator_exc_FairValueInputsAssetsQuantitativeInformationTable_11603"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:label="Locator_us-gaap_FairValueByFairValueHierarchyLevelAxis_11604"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_exc_FairValueInputsAssetsQuantitativeInformationTable_11603" xlink:to="Locator_us-gaap_FairValueByFairValueHierarchyLevelAxis_11604" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueInputsAssetsQuantitativeInformationTable" xlink:label="Locator_exc_FairValueInputsAssetsQuantitativeInformationTable_11605"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DerivativeByNatureAxis" xlink:label="Locator_us-gaap_DerivativeByNatureAxis_11606"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_exc_FairValueInputsAssetsQuantitativeInformationTable_11605" xlink:to="Locator_us-gaap_DerivativeByNatureAxis_11606" order="2.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueInputsAssetsQuantitativeInformationTable" xlink:label="Locator_exc_FairValueInputsAssetsQuantitativeInformationTable_11607"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ValuationTechniqueAxis" xlink:label="Locator_exc_ValuationTechniqueAxis_11608"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_exc_FairValueInputsAssetsQuantitativeInformationTable_11607" xlink:to="Locator_exc_ValuationTechniqueAxis_11608" order="3.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ValuationTechniqueAxis" xlink:label="Locator_exc_ValuationTechniqueAxis_11563"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ValuationTechniqueDomain" xlink:label="Locator_exc_ValuationTechniqueDomain_11564"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="Locator_exc_ValuationTechniqueAxis_11563" xlink:to="Locator_exc_ValuationTechniqueDomain_11564" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ValuationTechniqueAxis" xlink:label="Locator_exc_ValuationTechniqueAxis_11639"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ValuationTechniqueDomain" xlink:label="Locator_exc_ValuationTechniqueDomain_11640"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_exc_ValuationTechniqueAxis_11639" xlink:to="Locator_exc_ValuationTechniqueDomain_11640" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ValuationTechniqueDomain" xlink:label="Locator_exc_ValuationTechniqueDomain_11641"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_IncomeApproachValuationTechniqueMember" xlink:label="Locator_exc_IncomeApproachValuationTechniqueMember_11642"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_ValuationTechniqueDomain_11641" xlink:to="Locator_exc_IncomeApproachValuationTechniqueMember_11642" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ValuationTechniqueDomain" xlink:label="Locator_exc_ValuationTechniqueDomain_11643"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OptionModelValuationTechniqueMember" xlink:label="Locator_exc_OptionModelValuationTechniqueMember_11644"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_ValuationTechniqueDomain_11643" xlink:to="Locator_exc_OptionModelValuationTechniqueMember_11644" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueInputsAssetsQuantitativeInformationTable" xlink:label="Locator_exc_FairValueInputsAssetsQuantitativeInformationTable_11609"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RangeAxis" xlink:label="Locator_us-gaap_RangeAxis_11610"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_exc_FairValueInputsAssetsQuantitativeInformationTable_11609" xlink:to="Locator_us-gaap_RangeAxis_11610" order="4.0"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DerivativesFairValueLineItems" xlink:label="Locator_us-gaap_DerivativesFairValueLineItems_11645"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DerivativeAssetFairValueNet" xlink:label="Locator_us-gaap_DerivativeAssetFairValueNet_11646"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DerivativesFairValueLineItems_11645" xlink:to="Locator_us-gaap_DerivativeAssetFairValueNet_11646" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DerivativesFairValueLineItems" xlink:label="Locator_us-gaap_DerivativesFairValueLineItems_11647"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DerivativeLiabilityFairValueNet" xlink:label="Locator_us-gaap_DerivativeLiabilityFairValueNet_11648"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DerivativesFairValueLineItems_11647" xlink:to="Locator_us-gaap_DerivativeLiabilityFairValueNet_11648" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DerivativesFairValueLineItems" xlink:label="Locator_us-gaap_DerivativesFairValueLineItems_11649"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ForwardPowerBasis" xlink:label="Locator_exc_ForwardPowerBasis_11650"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DerivativesFairValueLineItems_11649" xlink:to="Locator_exc_ForwardPowerBasis_11650" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DerivativesFairValueLineItems" xlink:label="Locator_us-gaap_DerivativesFairValueLineItems_11651"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ForwardGasBasis" xlink:label="Locator_exc_ForwardGasBasis_11652"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DerivativesFairValueLineItems_11651" xlink:to="Locator_exc_ForwardGasBasis_11652" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DerivativesFairValueLineItems" xlink:label="Locator_us-gaap_DerivativesFairValueLineItems_11653"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueInputsAbstract" xlink:label="Locator_exc_FairValueInputsAbstract_11654"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DerivativesFairValueLineItems_11653" xlink:to="Locator_exc_FairValueInputsAbstract_11654" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueInputsAbstract" xlink:label="Locator_exc_FairValueInputsAbstract_11655"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueInputsForwardPowerPriceAssets" xlink:label="Locator_exc_FairValueInputsForwardPowerPriceAssets_11656"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FairValueInputsAbstract_11655" xlink:to="Locator_exc_FairValueInputsForwardPowerPriceAssets_11656" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueInputsAbstract" xlink:label="Locator_exc_FairValueInputsAbstract_11657"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueInputsForwardPowerPriceLiabilities" xlink:label="Locator_exc_FairValueInputsForwardPowerPriceLiabilities_11658"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FairValueInputsAbstract_11657" xlink:to="Locator_exc_FairValueInputsForwardPowerPriceLiabilities_11658" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueInputsAbstract" xlink:label="Locator_exc_FairValueInputsAbstract_11659"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueInputsForwardGasPriceAssets" xlink:label="Locator_exc_FairValueInputsForwardGasPriceAssets_11660"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FairValueInputsAbstract_11659" xlink:to="Locator_exc_FairValueInputsForwardGasPriceAssets_11660" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueInputsAbstract" xlink:label="Locator_exc_FairValueInputsAbstract_11661"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueInputsForwardGasPriceLiabilities" xlink:label="Locator_exc_FairValueInputsForwardGasPriceLiabilities_11662"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FairValueInputsAbstract_11661" xlink:to="Locator_exc_FairValueInputsForwardGasPriceLiabilities_11662" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueInputsAbstract" xlink:label="Locator_exc_FairValueInputsAbstract_11663"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueAssumptionsExpectedVolatilityRate" xlink:label="Locator_exc_FairValueAssumptionsExpectedVolatilityRate_11664"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FairValueInputsAbstract_11663" xlink:to="Locator_exc_FairValueAssumptionsExpectedVolatilityRate_11664" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueInputsAbstract" xlink:label="Locator_exc_FairValueInputsAbstract_11665"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueInputsDiscountForLackOfMarketability" xlink:label="Locator_exc_FairValueInputsDiscountForLackOfMarketability_11666"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FairValueInputsAbstract_11665" xlink:to="Locator_exc_FairValueInputsDiscountForLackOfMarketability_11666" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueInputsAbstract" xlink:label="Locator_exc_FairValueInputsAbstract_11667"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueInputsForwardHeatRate" xlink:label="Locator_exc_FairValueInputsForwardHeatRate_11668"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FairValueInputsAbstract_11667" xlink:to="Locator_exc_FairValueInputsForwardHeatRate_11668" order="7.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueInputsAbstract" xlink:label="Locator_exc_FairValueInputsAbstract_11669"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueInputsRenewableFactor" xlink:label="Locator_exc_FairValueInputsRenewableFactor_11670"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FairValueInputsAbstract_11669" xlink:to="Locator_exc_FairValueInputsRenewableFactor_11670" order="8.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DerivativesFairValueLineItems" xlink:label="Locator_us-gaap_DerivativesFairValueLineItems_11671"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DerivativesFairValueFootnotesAbstract" xlink:label="Locator_exc_DerivativesFairValueFootnotesAbstract_11672"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DerivativesFairValueLineItems_11671" xlink:to="Locator_exc_DerivativesFairValueFootnotesAbstract_11672" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DerivativesFairValueFootnotesAbstract" xlink:label="Locator_exc_DerivativesFairValueFootnotesAbstract_11673"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueSwapContractCurrentAssets" xlink:label="Locator_exc_FairValueSwapContractCurrentAssets_11674"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_DerivativesFairValueFootnotesAbstract_11673" xlink:to="Locator_exc_FairValueSwapContractCurrentAssets_11674" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DerivativesFairValueFootnotesAbstract" xlink:label="Locator_exc_DerivativesFairValueFootnotesAbstract_11675"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueSwapContractCurrentLiability" xlink:label="Locator_exc_FairValueSwapContractCurrentLiability_11676"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_DerivativesFairValueFootnotesAbstract_11675" xlink:to="Locator_exc_FairValueSwapContractCurrentLiability_11676" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DerivativesFairValueFootnotesAbstract" xlink:label="Locator_exc_DerivativesFairValueFootnotesAbstract_11677"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueInputsCashCollateralExcluded" xlink:label="Locator_exc_FairValueInputsCashCollateralExcluded_11678"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_DerivativesFairValueFootnotesAbstract_11677" xlink:to="Locator_exc_FairValueInputsCashCollateralExcluded_11678" order="2.0" xbrldt:usable="true"/> |
| | </definitionLink> |
| <definitionLink xlink:type="extended" xlink:role="http://exeloncorp.com/role/DisclosureDerivativeFinancialInstrumentsInterestRateRiskDetails"> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_11825"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_11826"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_dei_LegalEntityAxis_11825" xlink:to="Locator_dei_EntityDomain_11826" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_11827"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ExelonGenerationCoLLCMember" xlink:label="Locator_exc_ExelonGenerationCoLLCMember_11828"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_11827" xlink:to="Locator_exc_ExelonGenerationCoLLCMember_11828" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_11829"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OtherSegmentMember" xlink:label="Locator_exc_OtherSegmentMember_11830"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_11829" xlink:to="Locator_exc_OtherSegmentMember_11830" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DerivativeLineItems" xlink:label="Locator_us-gaap_DerivativeLineItems_11739"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DerivativeTable" xlink:label="Locator_us-gaap_DerivativeTable_11740"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="Locator_us-gaap_DerivativeLineItems_11739" xlink:to="Locator_us-gaap_DerivativeTable_11740" order="0.5" xbrldt:contextElement="segment" xbrldt:closed="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DerivativeTable" xlink:label="Locator_us-gaap_DerivativeTable_11817"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_11818"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_us-gaap_DerivativeTable_11817" xlink:to="Locator_dei_LegalEntityAxis_11818" order="0.0"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DerivativeTable" xlink:label="Locator_us-gaap_DerivativeTable_11819"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DerivativeByNatureAxis" xlink:label="Locator_us-gaap_DerivativeByNatureAxis_11820"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_us-gaap_DerivativeTable_11819" xlink:to="Locator_us-gaap_DerivativeByNatureAxis_11820" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DerivativeByNatureAxis" xlink:label="Locator_us-gaap_DerivativeByNatureAxis_11831"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DerivativeNameDomain" xlink:label="Locator_us-gaap_DerivativeNameDomain_11832"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_us-gaap_DerivativeByNatureAxis_11831" xlink:to="Locator_us-gaap_DerivativeNameDomain_11832" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DerivativeNameDomain" xlink:label="Locator_us-gaap_DerivativeNameDomain_11833"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DesignatedAsHedgingInstrumentMember" xlink:label="Locator_us-gaap_DesignatedAsHedgingInstrumentMember_11834"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DerivativeNameDomain_11833" xlink:to="Locator_us-gaap_DesignatedAsHedgingInstrumentMember_11834" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DerivativeNameDomain" xlink:label="Locator_us-gaap_DerivativeNameDomain_11835"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DerivativeMember" xlink:label="Locator_us-gaap_DerivativeMember_11836"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DerivativeNameDomain_11835" xlink:to="Locator_us-gaap_DerivativeMember_11836" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DerivativeNameDomain" xlink:label="Locator_us-gaap_DerivativeNameDomain_11837"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ProprietaryTradingMember" xlink:label="Locator_exc_ProprietaryTradingMember_11838"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DerivativeNameDomain_11837" xlink:to="Locator_exc_ProprietaryTradingMember_11838" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DerivativeTable" xlink:label="Locator_us-gaap_DerivativeTable_11821"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DerivativeInstrumentsGainLossByIncomeStatementLocationAxis" xlink:label="Locator_us-gaap_DerivativeInstrumentsGainLossByIncomeStatementLocationAxis_11822"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_us-gaap_DerivativeTable_11821" xlink:to="Locator_us-gaap_DerivativeInstrumentsGainLossByIncomeStatementLocationAxis_11822" order="2.0"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DerivativeInstrumentsGainLossByIncomeStatementLocationAxis" xlink:label="Locator_us-gaap_DerivativeInstrumentsGainLossByIncomeStatementLocationAxis_11725"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_IncomeStatementAndOtherComprehensiveIncomeLocationDomain" xlink:label="Locator_us-gaap_IncomeStatementAndOtherComprehensiveIncomeLocationDomain_11726"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="Locator_us-gaap_DerivativeInstrumentsGainLossByIncomeStatementLocationAxis_11725" xlink:to="Locator_us-gaap_IncomeStatementAndOtherComprehensiveIncomeLocationDomain_11726" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DerivativeInstrumentsGainLossByIncomeStatementLocationAxis" xlink:label="Locator_us-gaap_DerivativeInstrumentsGainLossByIncomeStatementLocationAxis_11839"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_IncomeStatementAndOtherComprehensiveIncomeLocationDomain" xlink:label="Locator_us-gaap_IncomeStatementAndOtherComprehensiveIncomeLocationDomain_11840"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_us-gaap_DerivativeInstrumentsGainLossByIncomeStatementLocationAxis_11839" xlink:to="Locator_us-gaap_IncomeStatementAndOtherComprehensiveIncomeLocationDomain_11840" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_IncomeStatementAndOtherComprehensiveIncomeLocationDomain" xlink:label="Locator_us-gaap_IncomeStatementAndOtherComprehensiveIncomeLocationDomain_11841"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_InterestExpenseMember" xlink:label="Locator_us-gaap_InterestExpenseMember_11842"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_IncomeStatementAndOtherComprehensiveIncomeLocationDomain_11841" xlink:to="Locator_us-gaap_InterestExpenseMember_11842" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DerivativeTable" xlink:label="Locator_us-gaap_DerivativeTable_11823"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RelatedProjectAxis" xlink:label="Locator_exc_RelatedProjectAxis_11824"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_us-gaap_DerivativeTable_11823" xlink:to="Locator_exc_RelatedProjectAxis_11824" order="3.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RelatedProjectAxis" xlink:label="Locator_exc_RelatedProjectAxis_11727"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RelatedProjectDomain" xlink:label="Locator_exc_RelatedProjectDomain_11728"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="Locator_exc_RelatedProjectAxis_11727" xlink:to="Locator_exc_RelatedProjectDomain_11728" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RelatedProjectAxis" xlink:label="Locator_exc_RelatedProjectAxis_11843"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RelatedProjectDomain" xlink:label="Locator_exc_RelatedProjectDomain_11844"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_exc_RelatedProjectAxis_11843" xlink:to="Locator_exc_RelatedProjectDomain_11844" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RelatedProjectDomain" xlink:label="Locator_exc_RelatedProjectDomain_11845"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AntelopeValleyProjectMember" xlink:label="Locator_exc_AntelopeValleyProjectMember_11846"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_RelatedProjectDomain_11845" xlink:to="Locator_exc_AntelopeValleyProjectMember_11846" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RelatedProjectDomain" xlink:label="Locator_exc_RelatedProjectDomain_11847"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OtherSolarProjectsMember" xlink:label="Locator_exc_OtherSolarProjectsMember_11848"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_RelatedProjectDomain_11847" xlink:to="Locator_exc_OtherSolarProjectsMember_11848" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DerivativeLineItems" xlink:label="Locator_us-gaap_DerivativeLineItems_11849"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CostOfCapitalStrategiesAbstract" xlink:label="Locator_exc_CostOfCapitalStrategiesAbstract_11850"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DerivativeLineItems_11849" xlink:to="Locator_exc_CostOfCapitalStrategiesAbstract_11850" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CostOfCapitalStrategiesAbstract" xlink:label="Locator_exc_CostOfCapitalStrategiesAbstract_11851"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_HypotheticalIncreaseInInterestRates" xlink:label="Locator_exc_HypotheticalIncreaseInInterestRates_11852"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_CostOfCapitalStrategiesAbstract_11851" xlink:to="Locator_exc_HypotheticalIncreaseInInterestRates_11852" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CostOfCapitalStrategiesAbstract" xlink:label="Locator_exc_CostOfCapitalStrategiesAbstract_11853"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_LessThanOneMillionDecrease" xlink:label="Locator_exc_LessThanOneMillionDecrease_11854"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_CostOfCapitalStrategiesAbstract_11853" xlink:to="Locator_exc_LessThanOneMillionDecrease_11854" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DerivativeLineItems" xlink:label="Locator_us-gaap_DerivativeLineItems_11855"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DerivativeInterestRateRiskAbstract" xlink:label="Locator_exc_DerivativeInterestRateRiskAbstract_11856"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DerivativeLineItems_11855" xlink:to="Locator_exc_DerivativeInterestRateRiskAbstract_11856" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DerivativeInterestRateRiskAbstract" xlink:label="Locator_exc_DerivativeInterestRateRiskAbstract_11857"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_InterestRateDerivativeAssetsCurrent" xlink:label="Locator_exc_InterestRateDerivativeAssetsCurrent_11858"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_DerivativeInterestRateRiskAbstract_11857" xlink:to="Locator_exc_InterestRateDerivativeAssetsCurrent_11858" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DerivativeInterestRateRiskAbstract" xlink:label="Locator_exc_DerivativeInterestRateRiskAbstract_11859"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_InterestRateDerivativeAssetsNoncurrent" xlink:label="Locator_exc_InterestRateDerivativeAssetsNoncurrent_11860"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_DerivativeInterestRateRiskAbstract_11859" xlink:to="Locator_exc_InterestRateDerivativeAssetsNoncurrent_11860" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DerivativeInterestRateRiskAbstract" xlink:label="Locator_exc_DerivativeInterestRateRiskAbstract_11861"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_TotalInterestRateMarkToMarketDerivativeAssets" xlink:label="Locator_exc_TotalInterestRateMarkToMarketDerivativeAssets_11862"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_DerivativeInterestRateRiskAbstract_11861" xlink:to="Locator_exc_TotalInterestRateMarkToMarketDerivativeAssets_11862" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DerivativeInterestRateRiskAbstract" xlink:label="Locator_exc_DerivativeInterestRateRiskAbstract_11863"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_InterestRateDerivativeLiabilitiesCurrent" xlink:label="Locator_exc_InterestRateDerivativeLiabilitiesCurrent_11864"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_DerivativeInterestRateRiskAbstract_11863" xlink:to="Locator_exc_InterestRateDerivativeLiabilitiesCurrent_11864" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DerivativeInterestRateRiskAbstract" xlink:label="Locator_exc_DerivativeInterestRateRiskAbstract_11865"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_InterestRateDerivativeLiabilitiesNoncurrent" xlink:label="Locator_exc_InterestRateDerivativeLiabilitiesNoncurrent_11866"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_DerivativeInterestRateRiskAbstract_11865" xlink:to="Locator_exc_InterestRateDerivativeLiabilitiesNoncurrent_11866" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DerivativeInterestRateRiskAbstract" xlink:label="Locator_exc_DerivativeInterestRateRiskAbstract_11867"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_TotalInterestRateMarkToMarketDerivativeLiabilities" xlink:label="Locator_exc_TotalInterestRateMarkToMarketDerivativeLiabilities_11868"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_DerivativeInterestRateRiskAbstract_11867" xlink:to="Locator_exc_TotalInterestRateMarkToMarketDerivativeLiabilities_11868" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DerivativeInterestRateRiskAbstract" xlink:label="Locator_exc_DerivativeInterestRateRiskAbstract_11869"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_InterestRateDerivativeFairValueOfDerivativeNet" xlink:label="Locator_exc_InterestRateDerivativeFairValueOfDerivativeNet_11870"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_DerivativeInterestRateRiskAbstract_11869" xlink:to="Locator_exc_InterestRateDerivativeFairValueOfDerivativeNet_11870" order="7.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DerivativeLineItems" xlink:label="Locator_us-gaap_DerivativeLineItems_11871"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DerivativeInstrumentsGainLossRecognizedInIncomeNetAbstract" xlink:label="Locator_us-gaap_DerivativeInstrumentsGainLossRecognizedInIncomeNetAbstract_11872"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DerivativeLineItems_11871" xlink:to="Locator_us-gaap_DerivativeInstrumentsGainLossRecognizedInIncomeNetAbstract_11872" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DerivativeInstrumentsGainLossRecognizedInIncomeNetAbstract" xlink:label="Locator_us-gaap_DerivativeInstrumentsGainLossRecognizedInIncomeNetAbstract_11873"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DerivativeInstrumentsGainRecognizedInIncome" xlink:label="Locator_us-gaap_DerivativeInstrumentsGainRecognizedInIncome_11874"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DerivativeInstrumentsGainLossRecognizedInIncomeNetAbstract_11873" xlink:to="Locator_us-gaap_DerivativeInstrumentsGainRecognizedInIncome_11874" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DerivativeInstrumentsGainLossRecognizedInIncomeNetAbstract" xlink:label="Locator_us-gaap_DerivativeInstrumentsGainLossRecognizedInIncomeNetAbstract_11875"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DerivativeInstrumentsLossRecognizedInIncome" xlink:label="Locator_us-gaap_DerivativeInstrumentsLossRecognizedInIncome_11876"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DerivativeInstrumentsGainLossRecognizedInIncomeNetAbstract_11875" xlink:to="Locator_us-gaap_DerivativeInstrumentsLossRecognizedInIncome_11876" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DerivativeInstrumentsGainLossRecognizedInIncomeNetAbstract" xlink:label="Locator_us-gaap_DerivativeInstrumentsGainLossRecognizedInIncomeNetAbstract_11877"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DerivativeInstrumentsGainLossRecognizedInIncomeNetFootnotesAbstract" xlink:label="Locator_exc_DerivativeInstrumentsGainLossRecognizedInIncomeNetFootnotesAbstract_11878"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DerivativeInstrumentsGainLossRecognizedInIncomeNetAbstract_11877" xlink:to="Locator_exc_DerivativeInstrumentsGainLossRecognizedInIncomeNetFootnotesAbstract_11878" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DerivativeInstrumentsGainLossRecognizedInIncomeNetFootnotesAbstract" xlink:label="Locator_exc_DerivativeInstrumentsGainLossRecognizedInIncomeNetFootnotesAbstract_11879"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_InterestRateSwapMergerAcquireeFairValue" xlink:label="Locator_exc_InterestRateSwapMergerAcquireeFairValue_11880"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_DerivativeInstrumentsGainLossRecognizedInIncomeNetFootnotesAbstract_11879" xlink:to="Locator_exc_InterestRateSwapMergerAcquireeFairValue_11880" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DerivativeLineItems" xlink:label="Locator_us-gaap_DerivativeLineItems_11881"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_InterestRateRiskFairValueHedgesAbstract" xlink:label="Locator_exc_InterestRateRiskFairValueHedgesAbstract_11882"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DerivativeLineItems_11881" xlink:to="Locator_exc_InterestRateRiskFairValueHedgesAbstract_11882" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_InterestRateRiskFairValueHedgesAbstract" xlink:label="Locator_exc_InterestRateRiskFairValueHedgesAbstract_11883"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NotionalAmountOfInterestRateFairValueHedgeDerivatives" xlink:label="Locator_us-gaap_NotionalAmountOfInterestRateFairValueHedgeDerivatives_11884"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_InterestRateRiskFairValueHedgesAbstract_11883" xlink:to="Locator_us-gaap_NotionalAmountOfInterestRateFairValueHedgeDerivatives_11884" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_InterestRateRiskFairValueHedgesAbstract" xlink:label="Locator_exc_InterestRateRiskFairValueHedgesAbstract_11885"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_InterestRateDerivativeAssetsAtFairValue" xlink:label="Locator_us-gaap_InterestRateDerivativeAssetsAtFairValue_11886"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_InterestRateRiskFairValueHedgesAbstract_11885" xlink:to="Locator_us-gaap_InterestRateDerivativeAssetsAtFairValue_11886" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_InterestRateRiskFairValueHedgesAbstract" xlink:label="Locator_exc_InterestRateRiskFairValueHedgesAbstract_11887"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_InterestRateSwapsAcquiree" xlink:label="Locator_exc_InterestRateSwapsAcquiree_11888"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_InterestRateRiskFairValueHedgesAbstract_11887" xlink:to="Locator_exc_InterestRateSwapsAcquiree_11888" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_InterestRateRiskFairValueHedgesAbstract" xlink:label="Locator_exc_InterestRateRiskFairValueHedgesAbstract_11889"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_InterestRateSwapsFairValueAcquiree" xlink:label="Locator_exc_InterestRateSwapsFairValueAcquiree_11890"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_InterestRateRiskFairValueHedgesAbstract_11889" xlink:to="Locator_exc_InterestRateSwapsFairValueAcquiree_11890" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_InterestRateRiskFairValueHedgesAbstract" xlink:label="Locator_exc_InterestRateRiskFairValueHedgesAbstract_11891"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NotionalAmountInterestRateSwapMergerAcquiree" xlink:label="Locator_exc_NotionalAmountInterestRateSwapMergerAcquiree_11892"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_InterestRateRiskFairValueHedgesAbstract_11891" xlink:to="Locator_exc_NotionalAmountInterestRateSwapMergerAcquiree_11892" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DerivativeLineItems" xlink:label="Locator_us-gaap_DerivativeLineItems_11893"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_InterestRateCashFlowHedgesAbstract" xlink:label="Locator_us-gaap_InterestRateCashFlowHedgesAbstract_11894"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DerivativeLineItems_11893" xlink:to="Locator_us-gaap_InterestRateCashFlowHedgesAbstract_11894" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_InterestRateCashFlowHedgesAbstract" xlink:label="Locator_us-gaap_InterestRateCashFlowHedgesAbstract_11895"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_LongTermDebtIssuedRetired" xlink:label="Locator_exc_LongTermDebtIssuedRetired_11896"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_InterestRateCashFlowHedgesAbstract_11895" xlink:to="Locator_exc_LongTermDebtIssuedRetired_11896" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_InterestRateCashFlowHedgesAbstract" xlink:label="Locator_us-gaap_InterestRateCashFlowHedgesAbstract_11897"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NotionalAmountOfInterestRateCashFlowHedgeDerivatives" xlink:label="Locator_us-gaap_NotionalAmountOfInterestRateCashFlowHedgeDerivatives_11898"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_InterestRateCashFlowHedgesAbstract_11897" xlink:to="Locator_us-gaap_NotionalAmountOfInterestRateCashFlowHedgeDerivatives_11898" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_InterestRateCashFlowHedgesAbstract" xlink:label="Locator_us-gaap_InterestRateCashFlowHedgesAbstract_11899"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_UnrealizedGainLossOnInterestRateCashFlowHedgesPretaxAccumulatedOtherComprehensiveIncomeLoss" xlink:label="Locator_us-gaap_UnrealizedGainLossOnInterestRateCashFlowHedgesPretaxAccumulatedOtherComprehensiveIncomeLoss_11900"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_InterestRateCashFlowHedgesAbstract_11899" xlink:to="Locator_us-gaap_UnrealizedGainLossOnInterestRateCashFlowHedgesPretaxAccumulatedOtherComprehensiveIncomeLoss_11900" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_InterestRateCashFlowHedgesAbstract" xlink:label="Locator_us-gaap_InterestRateCashFlowHedgesAbstract_11901"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NotionalAmountOfOtherDerivativesNotDesignatedAsHedgingInstruments" xlink:label="Locator_us-gaap_NotionalAmountOfOtherDerivativesNotDesignatedAsHedgingInstruments_11902"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_InterestRateCashFlowHedgesAbstract_11901" xlink:to="Locator_us-gaap_NotionalAmountOfOtherDerivativesNotDesignatedAsHedgingInstruments_11902" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_InterestRateCashFlowHedgesAbstract" xlink:label="Locator_us-gaap_InterestRateCashFlowHedgesAbstract_11903"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_GainLossOnInterestRateDerivativeInstrumentsNotDesignatedAsHedgingInstruments" xlink:label="Locator_us-gaap_GainLossOnInterestRateDerivativeInstrumentsNotDesignatedAsHedgingInstruments_11904"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_InterestRateCashFlowHedgesAbstract_11903" xlink:to="Locator_us-gaap_GainLossOnInterestRateDerivativeInstrumentsNotDesignatedAsHedgingInstruments_11904" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_InterestRateCashFlowHedgesAbstract" xlink:label="Locator_us-gaap_InterestRateCashFlowHedgesAbstract_11905"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DoeLoanGuarantee" xlink:label="Locator_exc_DoeLoanGuarantee_11906"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_InterestRateCashFlowHedgesAbstract_11905" xlink:to="Locator_exc_DoeLoanGuarantee_11906" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_InterestRateCashFlowHedgesAbstract" xlink:label="Locator_us-gaap_InterestRateCashFlowHedgesAbstract_11907"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DoeInterestRateSwap" xlink:label="Locator_exc_DoeInterestRateSwap_11908"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_InterestRateCashFlowHedgesAbstract_11907" xlink:to="Locator_exc_DoeInterestRateSwap_11908" order="7.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_InterestRateCashFlowHedgesAbstract" xlink:label="Locator_us-gaap_InterestRateCashFlowHedgesAbstract_11909"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PercentOfInterestRateSwapToGuarantee" xlink:label="Locator_exc_PercentOfInterestRateSwapToGuarantee_11910"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_InterestRateCashFlowHedgesAbstract_11909" xlink:to="Locator_exc_PercentOfInterestRateSwapToGuarantee_11910" order="8.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_InterestRateCashFlowHedgesAbstract" xlink:label="Locator_us-gaap_InterestRateCashFlowHedgesAbstract_11911"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NotionalAmountInterestRateSwapDoeLoanAdvance" xlink:label="Locator_exc_NotionalAmountInterestRateSwapDoeLoanAdvance_11912"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_InterestRateCashFlowHedgesAbstract_11911" xlink:to="Locator_exc_NotionalAmountInterestRateSwapDoeLoanAdvance_11912" order="9.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_InterestRateCashFlowHedgesAbstract" xlink:label="Locator_us-gaap_InterestRateCashFlowHedgesAbstract_11913"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PercentDoeLoanAdvanceOffset" xlink:label="Locator_exc_PercentDoeLoanAdvanceOffset_11914"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_InterestRateCashFlowHedgesAbstract_11913" xlink:to="Locator_exc_PercentDoeLoanAdvanceOffset_11914" order="10.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_InterestRateCashFlowHedgesAbstract" xlink:label="Locator_us-gaap_InterestRateCashFlowHedgesAbstract_11915"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NotionalAmountCashFlowHedgeOtherThanDoeAdvance" xlink:label="Locator_exc_NotionalAmountCashFlowHedgeOtherThanDoeAdvance_11916"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_InterestRateCashFlowHedgesAbstract_11915" xlink:to="Locator_exc_NotionalAmountCashFlowHedgeOtherThanDoeAdvance_11916" order="11.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_InterestRateCashFlowHedgesAbstract" xlink:label="Locator_us-gaap_InterestRateCashFlowHedgesAbstract_11917"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NotionalAmountsForwardStartingInterestRateSwaps" xlink:label="Locator_exc_NotionalAmountsForwardStartingInterestRateSwaps_11918"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_InterestRateCashFlowHedgesAbstract_11917" xlink:to="Locator_exc_NotionalAmountsForwardStartingInterestRateSwaps_11918" order="12.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_InterestRateCashFlowHedgesAbstract" xlink:label="Locator_us-gaap_InterestRateCashFlowHedgesAbstract_11919"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DerivativeLiabilitiesNoncurrent" xlink:label="Locator_us-gaap_DerivativeLiabilitiesNoncurrent_11920"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_InterestRateCashFlowHedgesAbstract_11919" xlink:to="Locator_us-gaap_DerivativeLiabilitiesNoncurrent_11920" order="13.0" xbrldt:usable="true"/> |
| | </definitionLink> |
| <definitionLink xlink:type="extended" xlink:role="http://exeloncorp.com/role/DisclosureFairValueOfFinancialAssetsAndLiabilitiesFairValueAssetsLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationDetails"> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_12017"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_12018"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_dei_LegalEntityAxis_12017" xlink:to="Locator_dei_EntityDomain_12018" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_12019"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ExelonGenerationCoLLCMember" xlink:label="Locator_exc_ExelonGenerationCoLLCMember_12020"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_12019" xlink:to="Locator_exc_ExelonGenerationCoLLCMember_12020" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_12021"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CommonwealthEdisonCoMember" xlink:label="Locator_exc_CommonwealthEdisonCoMember_12022"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_12021" xlink:to="Locator_exc_CommonwealthEdisonCoMember_12022" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_12023"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PecoEnergyCoMember" xlink:label="Locator_exc_PecoEnergyCoMember_12024"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_12023" xlink:to="Locator_exc_PecoEnergyCoMember_12024" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_12025"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BaltimoreGasAndElectricCompanyMember" xlink:label="Locator_exc_BaltimoreGasAndElectricCompanyMember_12026"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_12025" xlink:to="Locator_exc_BaltimoreGasAndElectricCompanyMember_12026" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:label="Locator_us-gaap_FairValueByFairValueHierarchyLevelAxis_12027"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="Locator_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_12028"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_us-gaap_FairValueByFairValueHierarchyLevelAxis_12027" xlink:to="Locator_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_12028" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="Locator_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_12029"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FairValueInputsLevel1Member" xlink:label="Locator_us-gaap_FairValueInputsLevel1Member_12030"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_12029" xlink:to="Locator_us-gaap_FairValueInputsLevel1Member_12030" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="Locator_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_12031"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FairValueInputsLevel2Member" xlink:label="Locator_us-gaap_FairValueInputsLevel2Member_12032"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_12031" xlink:to="Locator_us-gaap_FairValueInputsLevel2Member_12032" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="Locator_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_12033"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FairValueInputsLevel3Member" xlink:label="Locator_us-gaap_FairValueInputsLevel3Member_12034"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_12033" xlink:to="Locator_us-gaap_FairValueInputsLevel3Member_12034" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems" xlink:label="Locator_exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_11989"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueAssetsLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTable" xlink:label="Locator_exc_FairValueAssetsLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTable_11990"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="Locator_exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_11989" xlink:to="Locator_exc_FairValueAssetsLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTable_11990" order="0.5" xbrldt:contextElement="segment" xbrldt:closed="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueAssetsLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTable" xlink:label="Locator_exc_FairValueAssetsLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTable_12011"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_12012"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_exc_FairValueAssetsLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTable_12011" xlink:to="Locator_dei_LegalEntityAxis_12012" order="0.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueAssetsLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTable" xlink:label="Locator_exc_FairValueAssetsLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTable_12013"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetLiabilityTypeAxis" xlink:label="Locator_exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetLiabilityTypeAxis_12014"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_exc_FairValueAssetsLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTable_12013" xlink:to="Locator_exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetLiabilityTypeAxis_12014" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetLiabilityTypeAxis" xlink:label="Locator_exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetLiabilityTypeAxis_11955"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputsReconciliationAssetTypesDomain" xlink:label="Locator_exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputsReconciliationAssetTypesDomain_11956"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="Locator_exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetLiabilityTypeAxis_11955" xlink:to="Locator_exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputsReconciliationAssetTypesDomain_11956" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetLiabilityTypeAxis" xlink:label="Locator_exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetLiabilityTypeAxis_12035"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputsReconciliationAssetTypesDomain" xlink:label="Locator_exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputsReconciliationAssetTypesDomain_12036"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetLiabilityTypeAxis_12035" xlink:to="Locator_exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputsReconciliationAssetTypesDomain_12036" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputsReconciliationAssetTypesDomain" xlink:label="Locator_exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputsReconciliationAssetTypesDomain_12037"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NuclearDecommissioningTrustFundInvestmentLevelThreeAssetMember" xlink:label="Locator_exc_NuclearDecommissioningTrustFundInvestmentLevelThreeAssetMember_12038"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputsReconciliationAssetTypesDomain_12037" xlink:to="Locator_exc_NuclearDecommissioningTrustFundInvestmentLevelThreeAssetMember_12038" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputsReconciliationAssetTypesDomain" xlink:label="Locator_exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputsReconciliationAssetTypesDomain_12039"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PledgedAssetsForZionStationDecommissioningMember" xlink:label="Locator_exc_PledgedAssetsForZionStationDecommissioningMember_12040"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputsReconciliationAssetTypesDomain_12039" xlink:to="Locator_exc_PledgedAssetsForZionStationDecommissioningMember_12040" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputsReconciliationAssetTypesDomain" xlink:label="Locator_exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputsReconciliationAssetTypesDomain_12041"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DerivativeMember" xlink:label="Locator_us-gaap_DerivativeMember_12042"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputsReconciliationAssetTypesDomain_12041" xlink:to="Locator_us-gaap_DerivativeMember_12042" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputsReconciliationAssetTypesDomain" xlink:label="Locator_exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputsReconciliationAssetTypesDomain_12043"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherInvestmentsMember" xlink:label="Locator_us-gaap_OtherInvestmentsMember_12044"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputsReconciliationAssetTypesDomain_12043" xlink:to="Locator_us-gaap_OtherInvestmentsMember_12044" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputsReconciliationAssetTypesDomain" xlink:label="Locator_exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputsReconciliationAssetTypesDomain_12045"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ServicingLiabilityLevelThreeLiabilityMember" xlink:label="Locator_exc_ServicingLiabilityLevelThreeLiabilityMember_12046"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputsReconciliationAssetTypesDomain_12045" xlink:to="Locator_exc_ServicingLiabilityLevelThreeLiabilityMember_12046" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueAssetsLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTable" xlink:label="Locator_exc_FairValueAssetsLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTable_12015"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:label="Locator_us-gaap_FairValueByFairValueHierarchyLevelAxis_12016"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_exc_FairValueAssetsLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTable_12015" xlink:to="Locator_us-gaap_FairValueByFairValueHierarchyLevelAxis_12016" order="2.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems" xlink:label="Locator_exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_12047"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationAbstract" xlink:label="Locator_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationAbstract_12048"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_12047" xlink:to="Locator_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationAbstract_12048" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationAbstract" xlink:label="Locator_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationAbstract_12049"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetLiabilityValue" xlink:label="Locator_exc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetLiabilityValue_12050"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationAbstract_12049" xlink:to="Locator_exc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetLiabilityValue_12050" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationAbstract" xlink:label="Locator_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationAbstract_12051"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetLiabilityGainLossAbstract" xlink:label="Locator_exc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetLiabilityGainLossAbstract_12052"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationAbstract_12051" xlink:to="Locator_exc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetLiabilityGainLossAbstract_12052" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetLiabilityGainLossAbstract" xlink:label="Locator_exc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetLiabilityGainLossAbstract_12053"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetLiabilityGainLossIncludedInEarnings" xlink:label="Locator_exc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetLiabilityGainLossIncludedInEarnings_12054"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetLiabilityGainLossAbstract_12053" xlink:to="Locator_exc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetLiabilityGainLossIncludedInEarnings_12054" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetLiabilityGainLossAbstract" xlink:label="Locator_exc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetLiabilityGainLossAbstract_12055"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetLiabilityGainLossIncludedInOtherComprehensiveIncome" xlink:label="Locator_exc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetLiabilityGainLossIncludedInOtherComprehensiveIncome_12056"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetLiabilityGainLossAbstract_12055" xlink:to="Locator_exc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetLiabilityGainLossIncludedInOtherComprehensiveIncome_12056" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetLiabilityGainLossAbstract" xlink:label="Locator_exc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetLiabilityGainLossAbstract_12057"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetLiabilityGainLossIncludedInNuclearDecommissioningPayable" xlink:label="Locator_exc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetLiabilityGainLossIncludedInNuclearDecommissioningPayable_12058"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetLiabilityGainLossAbstract_12057" xlink:to="Locator_exc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetLiabilityGainLossIncludedInNuclearDecommissioningPayable_12058" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetLiabilityGainLossAbstract" xlink:label="Locator_exc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetLiabilityGainLossAbstract_12059"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetLiabilityGainLossIncludedInRegulatoryAssetsLiabilities" xlink:label="Locator_exc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetLiabilityGainLossIncludedInRegulatoryAssetsLiabilities_12060"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetLiabilityGainLossAbstract_12059" xlink:to="Locator_exc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetLiabilityGainLossIncludedInRegulatoryAssetsLiabilities_12060" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetLiabilityGainLossAbstract" xlink:label="Locator_exc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetLiabilityGainLossAbstract_12061"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisIncludedInNoncurrentPayablesToAffiliates" xlink:label="Locator_exc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisIncludedInNoncurrentPayablesToAffiliates_12062"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetLiabilityGainLossAbstract_12061" xlink:to="Locator_exc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisIncludedInNoncurrentPayablesToAffiliates_12062" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationAbstract" xlink:label="Locator_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationAbstract_12063"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetLiabilityGainLossChangeInCollateral" xlink:label="Locator_exc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetLiabilityGainLossChangeInCollateral_12064"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationAbstract_12063" xlink:to="Locator_exc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetLiabilityGainLossChangeInCollateral_12064" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationAbstract" xlink:label="Locator_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationAbstract_12065"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetLiabilityPurchasesSalesIssuancesSettlementsAbstract" xlink:label="Locator_exc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetLiabilityPurchasesSalesIssuancesSettlementsAbstract_12066"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationAbstract_12065" xlink:to="Locator_exc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetLiabilityPurchasesSalesIssuancesSettlementsAbstract_12066" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetLiabilityPurchasesSalesIssuancesSettlementsAbstract" xlink:label="Locator_exc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetLiabilityPurchasesSalesIssuancesSettlementsAbstract_12067"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases" xlink:label="Locator_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases_12068"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetLiabilityPurchasesSalesIssuancesSettlementsAbstract_12067" xlink:to="Locator_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases_12068" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetLiabilityPurchasesSalesIssuancesSettlementsAbstract" xlink:label="Locator_exc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetLiabilityPurchasesSalesIssuancesSettlementsAbstract_12069"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales" xlink:label="Locator_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales_12070"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetLiabilityPurchasesSalesIssuancesSettlementsAbstract_12069" xlink:to="Locator_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales_12070" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationAbstract" xlink:label="Locator_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationAbstract_12071"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetLiabilityTransfersIn" xlink:label="Locator_exc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetLiabilityTransfersIn_12072"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationAbstract_12071" xlink:to="Locator_exc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetLiabilityTransfersIn_12072" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationAbstract" xlink:label="Locator_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationAbstract_12073"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetLiabilityTransfersOut" xlink:label="Locator_exc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetLiabilityTransfersOut_12074"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationAbstract_12073" xlink:to="Locator_exc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetLiabilityTransfersOut_12074" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationAbstract" xlink:label="Locator_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationAbstract_12075"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetLiabilityTotalGainLossIncludedInEarningsAttributedToChangesInUnrealizedGainsLosses" xlink:label="Locator_exc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetLiabilityTotalGainLossIncludedInEarningsAttributedToChangesInUnrealizedGainsLosses_12076"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationAbstract_12075" xlink:to="Locator_exc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetLiabilityTotalGainLossIncludedInEarningsAttributedToChangesInUnrealizedGainsLosses_12076" order="8.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems" xlink:label="Locator_exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_12077"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FootnotesToFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationAbstract" xlink:label="Locator_exc_FootnotesToFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationAbstract_12078"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_12077" xlink:to="Locator_exc_FootnotesToFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationAbstract_12078" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FootnotesToFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationAbstract" xlink:label="Locator_exc_FootnotesToFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationAbstract_12079"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DerivativeGainLossReclassifiedToEarningsNet" xlink:label="Locator_exc_DerivativeGainLossReclassifiedToEarningsNet_12080"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FootnotesToFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationAbstract_12079" xlink:to="Locator_exc_DerivativeGainLossReclassifiedToEarningsNet_12080" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FootnotesToFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationAbstract" xlink:label="Locator_exc_FootnotesToFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationAbstract_12081"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueChangesSwap" xlink:label="Locator_exc_FairValueChangesSwap_12082"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FootnotesToFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationAbstract_12081" xlink:to="Locator_exc_FairValueChangesSwap_12082" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FootnotesToFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationAbstract" xlink:label="Locator_exc_FootnotesToFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationAbstract_12083"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueRealizedGainsLossesSwap" xlink:label="Locator_exc_FairValueRealizedGainsLossesSwap_12084"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FootnotesToFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationAbstract_12083" xlink:to="Locator_exc_FairValueRealizedGainsLossesSwap_12084" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FootnotesToFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationAbstract" xlink:label="Locator_exc_FootnotesToFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationAbstract_12085"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueRealizedGainsLossesSwapUnaffiliatedParties" xlink:label="Locator_exc_FairValueRealizedGainsLossesSwapUnaffiliatedParties_12086"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FootnotesToFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationAbstract_12085" xlink:to="Locator_exc_FairValueRealizedGainsLossesSwapUnaffiliatedParties_12086" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FootnotesToFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationAbstract" xlink:label="Locator_exc_FootnotesToFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationAbstract_12087"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueChangesBlockContract" xlink:label="Locator_exc_FairValueChangesBlockContract_12088"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FootnotesToFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationAbstract_12087" xlink:to="Locator_exc_FairValueChangesBlockContract_12088" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FootnotesToFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationAbstract" xlink:label="Locator_exc_FootnotesToFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationAbstract_12089"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueChangesEnergySwapUnaffiliatedSuppliers" xlink:label="Locator_exc_FairValueChangesEnergySwapUnaffiliatedSuppliers_12090"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FootnotesToFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationAbstract_12089" xlink:to="Locator_exc_FairValueChangesEnergySwapUnaffiliatedSuppliers_12090" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FootnotesToFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationAbstract" xlink:label="Locator_exc_FootnotesToFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationAbstract_12091"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisPledgedAssetLiabilityPurchasesSalesIssuancesSettlements" xlink:label="Locator_exc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisPledgedAssetLiabilityPurchasesSalesIssuancesSettlements_12092"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FootnotesToFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationAbstract_12091" xlink:to="Locator_exc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisPledgedAssetLiabilityPurchasesSalesIssuancesSettlements_12092" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FootnotesToFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationAbstract" xlink:label="Locator_exc_FootnotesToFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationAbstract_12093"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BusinessCombinationLevel3AssetsArisingFromAcquisitionOfEntity" xlink:label="Locator_exc_BusinessCombinationLevel3AssetsArisingFromAcquisitionOfEntity_12094"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FootnotesToFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationAbstract_12093" xlink:to="Locator_exc_BusinessCombinationLevel3AssetsArisingFromAcquisitionOfEntity_12094" order="7.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FootnotesToFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationAbstract" xlink:label="Locator_exc_FootnotesToFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationAbstract_12095"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AcquisitionOfMarketableSecurities" xlink:label="Locator_exc_AcquisitionOfMarketableSecurities_12096"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FootnotesToFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationAbstract_12095" xlink:to="Locator_exc_AcquisitionOfMarketableSecurities_12096" order="8.0" xbrldt:usable="true"/> |
| | </definitionLink> |
| <definitionLink xlink:type="extended" xlink:role="http://exeloncorp.com/role/FairValueOfFinancialAssetsAndLiabilitiesFairValueByBalanceSheetGroupingDetails"> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_12159"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_12160"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_dei_LegalEntityAxis_12159" xlink:to="Locator_dei_EntityDomain_12160" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_12161"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ExelonGenerationCoLLCMember" xlink:label="Locator_exc_ExelonGenerationCoLLCMember_12162"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_12161" xlink:to="Locator_exc_ExelonGenerationCoLLCMember_12162" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_12163"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CommonwealthEdisonCoMember" xlink:label="Locator_exc_CommonwealthEdisonCoMember_12164"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_12163" xlink:to="Locator_exc_CommonwealthEdisonCoMember_12164" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_12165"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PecoEnergyCoMember" xlink:label="Locator_exc_PecoEnergyCoMember_12166"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_12165" xlink:to="Locator_exc_PecoEnergyCoMember_12166" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_12167"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BaltimoreGasAndElectricCompanyMember" xlink:label="Locator_exc_BaltimoreGasAndElectricCompanyMember_12168"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_12167" xlink:to="Locator_exc_BaltimoreGasAndElectricCompanyMember_12168" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:label="Locator_us-gaap_FairValueByFairValueHierarchyLevelAxis_12175"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="Locator_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_12176"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_us-gaap_FairValueByFairValueHierarchyLevelAxis_12175" xlink:to="Locator_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_12176" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="Locator_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_12177"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FairValueInputsLevel1Member" xlink:label="Locator_us-gaap_FairValueInputsLevel1Member_12178"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_12177" xlink:to="Locator_us-gaap_FairValueInputsLevel1Member_12178" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="Locator_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_12179"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FairValueInputsLevel2Member" xlink:label="Locator_us-gaap_FairValueInputsLevel2Member_12180"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_12179" xlink:to="Locator_us-gaap_FairValueInputsLevel2Member_12180" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="Locator_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_12181"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FairValueInputsLevel3Member" xlink:label="Locator_us-gaap_FairValueInputsLevel3Member_12182"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_12181" xlink:to="Locator_us-gaap_FairValueInputsLevel3Member_12182" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems" xlink:label="Locator_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_12139"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FairValueByBalanceSheetGroupingTable" xlink:label="Locator_us-gaap_FairValueByBalanceSheetGroupingTable_12140"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="Locator_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_12139" xlink:to="Locator_us-gaap_FairValueByBalanceSheetGroupingTable_12140" order="0.5" xbrldt:contextElement="segment" xbrldt:closed="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FairValueByBalanceSheetGroupingTable" xlink:label="Locator_us-gaap_FairValueByBalanceSheetGroupingTable_12153"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_12154"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_us-gaap_FairValueByBalanceSheetGroupingTable_12153" xlink:to="Locator_dei_LegalEntityAxis_12154" order="0.0"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FairValueByBalanceSheetGroupingTable" xlink:label="Locator_us-gaap_FairValueByBalanceSheetGroupingTable_12155"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FairValueByBalanceSheetGroupingDisclosureItemAmountsAxis" xlink:label="Locator_us-gaap_FairValueByBalanceSheetGroupingDisclosureItemAmountsAxis_12156"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_us-gaap_FairValueByBalanceSheetGroupingTable_12155" xlink:to="Locator_us-gaap_FairValueByBalanceSheetGroupingDisclosureItemAmountsAxis_12156" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FairValueByBalanceSheetGroupingDisclosureItemAmountsAxis" xlink:label="Locator_us-gaap_FairValueByBalanceSheetGroupingDisclosureItemAmountsAxis_12135"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FairValueDisclosureItemAmountsDomain" xlink:label="Locator_us-gaap_FairValueDisclosureItemAmountsDomain_12136"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="Locator_us-gaap_FairValueByBalanceSheetGroupingDisclosureItemAmountsAxis_12135" xlink:to="Locator_us-gaap_FairValueDisclosureItemAmountsDomain_12136" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FairValueByBalanceSheetGroupingDisclosureItemAmountsAxis" xlink:label="Locator_us-gaap_FairValueByBalanceSheetGroupingDisclosureItemAmountsAxis_12169"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FairValueDisclosureItemAmountsDomain" xlink:label="Locator_us-gaap_FairValueDisclosureItemAmountsDomain_12170"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_us-gaap_FairValueByBalanceSheetGroupingDisclosureItemAmountsAxis_12169" xlink:to="Locator_us-gaap_FairValueDisclosureItemAmountsDomain_12170" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FairValueDisclosureItemAmountsDomain" xlink:label="Locator_us-gaap_FairValueDisclosureItemAmountsDomain_12171"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CarryingReportedAmountFairValueDisclosureMember" xlink:label="Locator_us-gaap_CarryingReportedAmountFairValueDisclosureMember_12172"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_FairValueDisclosureItemAmountsDomain_12171" xlink:to="Locator_us-gaap_CarryingReportedAmountFairValueDisclosureMember_12172" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FairValueDisclosureItemAmountsDomain" xlink:label="Locator_us-gaap_FairValueDisclosureItemAmountsDomain_12173"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_EstimateOfFairValueFairValueDisclosureMember" xlink:label="Locator_us-gaap_EstimateOfFairValueFairValueDisclosureMember_12174"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_FairValueDisclosureItemAmountsDomain_12173" xlink:to="Locator_us-gaap_EstimateOfFairValueFairValueDisclosureMember_12174" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FairValueByBalanceSheetGroupingTable" xlink:label="Locator_us-gaap_FairValueByBalanceSheetGroupingTable_12157"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:label="Locator_us-gaap_FairValueByFairValueHierarchyLevelAxis_12158"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_us-gaap_FairValueByBalanceSheetGroupingTable_12157" xlink:to="Locator_us-gaap_FairValueByFairValueHierarchyLevelAxis_12158" order="2.0"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems" xlink:label="Locator_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_12183"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FinancialInstrumentsFinancialLiabilitiesBalanceSheetGroupingsAbstract" xlink:label="Locator_us-gaap_FinancialInstrumentsFinancialLiabilitiesBalanceSheetGroupingsAbstract_12184"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_12183" xlink:to="Locator_us-gaap_FinancialInstrumentsFinancialLiabilitiesBalanceSheetGroupingsAbstract_12184" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FinancialInstrumentsFinancialLiabilitiesBalanceSheetGroupingsAbstract" xlink:label="Locator_us-gaap_FinancialInstrumentsFinancialLiabilitiesBalanceSheetGroupingsAbstract_12185"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ShorttermLiabilitiesFairValue" xlink:label="Locator_exc_ShorttermLiabilitiesFairValue_12186"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_FinancialInstrumentsFinancialLiabilitiesBalanceSheetGroupingsAbstract_12185" xlink:to="Locator_exc_ShorttermLiabilitiesFairValue_12186" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FinancialInstrumentsFinancialLiabilitiesBalanceSheetGroupingsAbstract" xlink:label="Locator_us-gaap_FinancialInstrumentsFinancialLiabilitiesBalanceSheetGroupingsAbstract_12187"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DebtInstrumentFairValue" xlink:label="Locator_us-gaap_DebtInstrumentFairValue_12188"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_FinancialInstrumentsFinancialLiabilitiesBalanceSheetGroupingsAbstract_12187" xlink:to="Locator_us-gaap_DebtInstrumentFairValue_12188" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FinancialInstrumentsFinancialLiabilitiesBalanceSheetGroupingsAbstract" xlink:label="Locator_us-gaap_FinancialInstrumentsFinancialLiabilitiesBalanceSheetGroupingsAbstract_12189"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_LongTermDebtToTransitionTrustFairValueDisclosure" xlink:label="Locator_exc_LongTermDebtToTransitionTrustFairValueDisclosure_12190"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_FinancialInstrumentsFinancialLiabilitiesBalanceSheetGroupingsAbstract_12189" xlink:to="Locator_exc_LongTermDebtToTransitionTrustFairValueDisclosure_12190" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FinancialInstrumentsFinancialLiabilitiesBalanceSheetGroupingsAbstract" xlink:label="Locator_us-gaap_FinancialInstrumentsFinancialLiabilitiesBalanceSheetGroupingsAbstract_12191"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_LongTermDebtToFinancingTrustsFairValueDisclosure" xlink:label="Locator_exc_LongTermDebtToFinancingTrustsFairValueDisclosure_12192"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_FinancialInstrumentsFinancialLiabilitiesBalanceSheetGroupingsAbstract_12191" xlink:to="Locator_exc_LongTermDebtToFinancingTrustsFairValueDisclosure_12192" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FinancialInstrumentsFinancialLiabilitiesBalanceSheetGroupingsAbstract" xlink:label="Locator_us-gaap_FinancialInstrumentsFinancialLiabilitiesBalanceSheetGroupingsAbstract_12193"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SpentNuclearFuelObligationsFairValueDisclosure" xlink:label="Locator_exc_SpentNuclearFuelObligationsFairValueDisclosure_12194"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_FinancialInstrumentsFinancialLiabilitiesBalanceSheetGroupingsAbstract_12193" xlink:to="Locator_exc_SpentNuclearFuelObligationsFairValueDisclosure_12194" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FinancialInstrumentsFinancialLiabilitiesBalanceSheetGroupingsAbstract" xlink:label="Locator_us-gaap_FinancialInstrumentsFinancialLiabilitiesBalanceSheetGroupingsAbstract_12195"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_MandatorilyRedeemablePreferredStockFairValueDisclosure" xlink:label="Locator_us-gaap_MandatorilyRedeemablePreferredStockFairValueDisclosure_12196"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_FinancialInstrumentsFinancialLiabilitiesBalanceSheetGroupingsAbstract_12195" xlink:to="Locator_us-gaap_MandatorilyRedeemablePreferredStockFairValueDisclosure_12196" order="6.0" xbrldt:usable="true"/> |
| | </definitionLink> |
| <definitionLink xlink:type="extended" xlink:role="http://exeloncorp.com/role/FairValueOfFinancialAssetsAndLiabilitiesFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisGainLossIncludedInEarningsDetails"> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_12243"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_12244"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_dei_LegalEntityAxis_12243" xlink:to="Locator_dei_EntityDomain_12244" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_12245"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ExelonGenerationCoLLCMember" xlink:label="Locator_exc_ExelonGenerationCoLLCMember_12246"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_12245" xlink:to="Locator_exc_ExelonGenerationCoLLCMember_12246" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_12247"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CommonwealthEdisonCoMember" xlink:label="Locator_exc_CommonwealthEdisonCoMember_12248"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_12247" xlink:to="Locator_exc_CommonwealthEdisonCoMember_12248" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_12249"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PecoEnergyCoMember" xlink:label="Locator_exc_PecoEnergyCoMember_12250"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_12249" xlink:to="Locator_exc_PecoEnergyCoMember_12250" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_12251"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BaltimoreGasAndElectricCompanyMember" xlink:label="Locator_exc_BaltimoreGasAndElectricCompanyMember_12252"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_12251" xlink:to="Locator_exc_BaltimoreGasAndElectricCompanyMember_12252" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisGainLossIncludedInEarningsLineItems" xlink:label="Locator_exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisGainLossIncludedInEarningsLineItems_12235"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisGainLossIncludedInEarningsTable" xlink:label="Locator_exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisGainLossIncludedInEarningsTable_12236"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="Locator_exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisGainLossIncludedInEarningsLineItems_12235" xlink:to="Locator_exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisGainLossIncludedInEarningsTable_12236" order="0.5" xbrldt:contextElement="segment" xbrldt:closed="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisGainLossIncludedInEarningsTable" xlink:label="Locator_exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisGainLossIncludedInEarningsTable_12237"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_12238"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisGainLossIncludedInEarningsTable_12237" xlink:to="Locator_dei_LegalEntityAxis_12238" order="0.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisGainLossIncludedInEarningsTable" xlink:label="Locator_exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisGainLossIncludedInEarningsTable_12239"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisGainLossIncludedInEarningsByLineItemAxis" xlink:label="Locator_exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisGainLossIncludedInEarningsByLineItemAxis_12240"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisGainLossIncludedInEarningsTable_12239" xlink:to="Locator_exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisGainLossIncludedInEarningsByLineItemAxis_12240" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisGainLossIncludedInEarningsByLineItemAxis" xlink:label="Locator_exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisGainLossIncludedInEarningsByLineItemAxis_12229"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisGainLossIncludedInEarningsLineItemDomain" xlink:label="Locator_exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisGainLossIncludedInEarningsLineItemDomain_12230"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="Locator_exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisGainLossIncludedInEarningsByLineItemAxis_12229" xlink:to="Locator_exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisGainLossIncludedInEarningsLineItemDomain_12230" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisGainLossIncludedInEarningsByLineItemAxis" xlink:label="Locator_exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisGainLossIncludedInEarningsByLineItemAxis_12261"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisGainLossIncludedInEarningsLineItemDomain" xlink:label="Locator_exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisGainLossIncludedInEarningsLineItemDomain_12262"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisGainLossIncludedInEarningsByLineItemAxis_12261" xlink:to="Locator_exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisGainLossIncludedInEarningsLineItemDomain_12262" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisGainLossIncludedInEarningsLineItemDomain" xlink:label="Locator_exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisGainLossIncludedInEarningsLineItemDomain_12263"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OperatingRevenueMember" xlink:label="Locator_exc_OperatingRevenueMember_12264"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisGainLossIncludedInEarningsLineItemDomain_12263" xlink:to="Locator_exc_OperatingRevenueMember_12264" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisGainLossIncludedInEarningsLineItemDomain" xlink:label="Locator_exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisGainLossIncludedInEarningsLineItemDomain_12265"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PurchasedFuelAndElectricMember" xlink:label="Locator_exc_PurchasedFuelAndElectricMember_12266"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisGainLossIncludedInEarningsLineItemDomain_12265" xlink:to="Locator_exc_PurchasedFuelAndElectricMember_12266" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisGainLossIncludedInEarningsLineItemDomain" xlink:label="Locator_exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisGainLossIncludedInEarningsLineItemDomain_12267"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OtherNetMember" xlink:label="Locator_exc_OtherNetMember_12268"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisGainLossIncludedInEarningsLineItemDomain_12267" xlink:to="Locator_exc_OtherNetMember_12268" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisGainLossIncludedInEarningsTable" xlink:label="Locator_exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisGainLossIncludedInEarningsTable_12241"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:label="Locator_us-gaap_FairValueByFairValueHierarchyLevelAxis_12242"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisGainLossIncludedInEarningsTable_12241" xlink:to="Locator_us-gaap_FairValueByFairValueHierarchyLevelAxis_12242" order="2.0"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:label="Locator_us-gaap_FairValueByFairValueHierarchyLevelAxis_12253"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="Locator_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_12254"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_us-gaap_FairValueByFairValueHierarchyLevelAxis_12253" xlink:to="Locator_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_12254" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="Locator_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_12255"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FairValueInputsLevel1Member" xlink:label="Locator_us-gaap_FairValueInputsLevel1Member_12256"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_12255" xlink:to="Locator_us-gaap_FairValueInputsLevel1Member_12256" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="Locator_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_12257"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FairValueInputsLevel2Member" xlink:label="Locator_us-gaap_FairValueInputsLevel2Member_12258"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_12257" xlink:to="Locator_us-gaap_FairValueInputsLevel2Member_12258" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="Locator_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_12259"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FairValueInputsLevel3Member" xlink:label="Locator_us-gaap_FairValueInputsLevel3Member_12260"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_12259" xlink:to="Locator_us-gaap_FairValueInputsLevel3Member_12260" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisGainLossIncludedInEarningsLineItems" xlink:label="Locator_exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisGainLossIncludedInEarningsLineItems_12269"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueAssetsMeasuredOnRecurringBasisGainLossIncludedInNetIncome" xlink:label="Locator_exc_FairValueAssetsMeasuredOnRecurringBasisGainLossIncludedInNetIncome_12270"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisGainLossIncludedInEarningsLineItems_12269" xlink:to="Locator_exc_FairValueAssetsMeasuredOnRecurringBasisGainLossIncludedInNetIncome_12270" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisGainLossIncludedInEarningsLineItems" xlink:label="Locator_exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisGainLossIncludedInEarningsLineItems_12271"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetLiabilityGainLossIncludedInEarningsAttributedToChangesInUnrealizedGainsLosses" xlink:label="Locator_exc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetLiabilityGainLossIncludedInEarningsAttributedToChangesInUnrealizedGainsLosses_12272"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisGainLossIncludedInEarningsLineItems_12271" xlink:to="Locator_exc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetLiabilityGainLossIncludedInEarningsAttributedToChangesInUnrealizedGainsLosses_12272" order="2.0" xbrldt:usable="true"/> |
| | </definitionLink> |
| <definitionLink xlink:type="extended" xlink:role="http://exeloncorp.com/role/DebtAndCreditAgreementsMaturititesOfLongtermDebtDetails"> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_12331"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_12332"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_dei_LegalEntityAxis_12331" xlink:to="Locator_dei_EntityDomain_12332" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_12333"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ParentCompanyMember" xlink:label="Locator_us-gaap_ParentCompanyMember_12334"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_12333" xlink:to="Locator_us-gaap_ParentCompanyMember_12334" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_12335"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ExelonGenerationCoLLCMember" xlink:label="Locator_exc_ExelonGenerationCoLLCMember_12336"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_12335" xlink:to="Locator_exc_ExelonGenerationCoLLCMember_12336" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_12337"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CommonwealthEdisonCoMember" xlink:label="Locator_exc_CommonwealthEdisonCoMember_12338"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_12337" xlink:to="Locator_exc_CommonwealthEdisonCoMember_12338" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_12339"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PecoEnergyCoMember" xlink:label="Locator_exc_PecoEnergyCoMember_12340"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_12339" xlink:to="Locator_exc_PecoEnergyCoMember_12340" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_12341"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BaltimoreGasAndElectricCompanyMember" xlink:label="Locator_exc_BaltimoreGasAndElectricCompanyMember_12342"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_12341" xlink:to="Locator_exc_BaltimoreGasAndElectricCompanyMember_12342" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_MaturitiesOfLongTermDebtLineItems" xlink:label="Locator_exc_MaturitiesOfLongTermDebtLineItems_12311"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_MaturitiesOfLongTermDebtTable" xlink:label="Locator_exc_MaturitiesOfLongTermDebtTable_12312"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="Locator_exc_MaturitiesOfLongTermDebtLineItems_12311" xlink:to="Locator_exc_MaturitiesOfLongTermDebtTable_12312" order="0.5" xbrldt:contextElement="segment" xbrldt:closed="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_MaturitiesOfLongTermDebtTable" xlink:label="Locator_exc_MaturitiesOfLongTermDebtTable_12329"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_12330"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_exc_MaturitiesOfLongTermDebtTable_12329" xlink:to="Locator_dei_LegalEntityAxis_12330" order="0.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_MaturitiesOfLongTermDebtLineItems" xlink:label="Locator_exc_MaturitiesOfLongTermDebtLineItems_12343"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LongTermDebtByMaturityAbstract" xlink:label="Locator_us-gaap_LongTermDebtByMaturityAbstract_12344"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_MaturitiesOfLongTermDebtLineItems_12343" xlink:to="Locator_us-gaap_LongTermDebtByMaturityAbstract_12344" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LongTermDebtByMaturityAbstract" xlink:label="Locator_us-gaap_LongTermDebtByMaturityAbstract_12345"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths" xlink:label="Locator_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths_12346"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_LongTermDebtByMaturityAbstract_12345" xlink:to="Locator_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths_12346" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LongTermDebtByMaturityAbstract" xlink:label="Locator_us-gaap_LongTermDebtByMaturityAbstract_12347"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo" xlink:label="Locator_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo_12348"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_LongTermDebtByMaturityAbstract_12347" xlink:to="Locator_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo_12348" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LongTermDebtByMaturityAbstract" xlink:label="Locator_us-gaap_LongTermDebtByMaturityAbstract_12349"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree" xlink:label="Locator_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree_12350"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_LongTermDebtByMaturityAbstract_12349" xlink:to="Locator_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree_12350" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LongTermDebtByMaturityAbstract" xlink:label="Locator_us-gaap_LongTermDebtByMaturityAbstract_12351"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour" xlink:label="Locator_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour_12352"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_LongTermDebtByMaturityAbstract_12351" xlink:to="Locator_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour_12352" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LongTermDebtByMaturityAbstract" xlink:label="Locator_us-gaap_LongTermDebtByMaturityAbstract_12353"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive" xlink:label="Locator_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive_12354"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_LongTermDebtByMaturityAbstract_12353" xlink:to="Locator_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive_12354" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LongTermDebtByMaturityAbstract" xlink:label="Locator_us-gaap_LongTermDebtByMaturityAbstract_12355"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive" xlink:label="Locator_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive_12356"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_LongTermDebtByMaturityAbstract_12355" xlink:to="Locator_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive_12356" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LongTermDebtByMaturityAbstract" xlink:label="Locator_us-gaap_LongTermDebtByMaturityAbstract_12357"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LongTermDebt" xlink:label="Locator_us-gaap_LongTermDebt_12358"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_LongTermDebtByMaturityAbstract_12357" xlink:to="Locator_us-gaap_LongTermDebt_12358" order="7.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_MaturitiesOfLongTermDebtLineItems" xlink:label="Locator_exc_MaturitiesOfLongTermDebtLineItems_12359"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FootnotesToMaturitiesOfLongTermDebtAbstract" xlink:label="Locator_exc_FootnotesToMaturitiesOfLongTermDebtAbstract_12360"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_MaturitiesOfLongTermDebtLineItems_12359" xlink:to="Locator_exc_FootnotesToMaturitiesOfLongTermDebtAbstract_12360" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FootnotesToMaturitiesOfLongTermDebtAbstract" xlink:label="Locator_exc_FootnotesToMaturitiesOfLongTermDebtAbstract_12361"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFiveDueToRelatedParty" xlink:label="Locator_exc_LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFiveDueToRelatedParty_12362"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FootnotesToMaturitiesOfLongTermDebtAbstract_12361" xlink:to="Locator_exc_LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFiveDueToRelatedParty_12362" order="1.0" xbrldt:usable="true"/> |
| | </definitionLink> |
| <definitionLink xlink:type="extended" xlink:role="http://exeloncorp.com/role/DisclosureSupplementalFinancialInformationCashFlowDetails"> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_12557"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_12558"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_dei_LegalEntityAxis_12557" xlink:to="Locator_dei_EntityDomain_12558" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_12559"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ExelonGenerationCoLLCMember" xlink:label="Locator_exc_ExelonGenerationCoLLCMember_12560"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_12559" xlink:to="Locator_exc_ExelonGenerationCoLLCMember_12560" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_12561"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CommonwealthEdisonCoMember" xlink:label="Locator_exc_CommonwealthEdisonCoMember_12562"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_12561" xlink:to="Locator_exc_CommonwealthEdisonCoMember_12562" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_12563"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PecoEnergyCoMember" xlink:label="Locator_exc_PecoEnergyCoMember_12564"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_12563" xlink:to="Locator_exc_PecoEnergyCoMember_12564" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_12565"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BaltimoreGasAndElectricCompanyMember" xlink:label="Locator_exc_BaltimoreGasAndElectricCompanyMember_12566"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_12565" xlink:to="Locator_exc_BaltimoreGasAndElectricCompanyMember_12566" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SupplementalCashFlowInformationLineItems" xlink:label="Locator_exc_SupplementalCashFlowInformationLineItems_12395"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SupplementalCashFlowInformationTable" xlink:label="Locator_exc_SupplementalCashFlowInformationTable_12396"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="Locator_exc_SupplementalCashFlowInformationLineItems_12395" xlink:to="Locator_exc_SupplementalCashFlowInformationTable_12396" order="0.5" xbrldt:contextElement="segment" xbrldt:closed="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SupplementalCashFlowInformationTable" xlink:label="Locator_exc_SupplementalCashFlowInformationTable_12551"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_12552"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_exc_SupplementalCashFlowInformationTable_12551" xlink:to="Locator_dei_LegalEntityAxis_12552" order="0.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SupplementalCashFlowInformationTable" xlink:label="Locator_exc_SupplementalCashFlowInformationTable_12553"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_GuaranteeObligationsByNatureAxis" xlink:label="Locator_us-gaap_GuaranteeObligationsByNatureAxis_12554"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_exc_SupplementalCashFlowInformationTable_12553" xlink:to="Locator_us-gaap_GuaranteeObligationsByNatureAxis_12554" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_GuaranteeObligationsByNatureAxis" xlink:label="Locator_us-gaap_GuaranteeObligationsByNatureAxis_12379"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_GuaranteeObligationsNatureDomain" xlink:label="Locator_us-gaap_GuaranteeObligationsNatureDomain_12380"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="Locator_us-gaap_GuaranteeObligationsByNatureAxis_12379" xlink:to="Locator_us-gaap_GuaranteeObligationsNatureDomain_12380" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_GuaranteeObligationsByNatureAxis" xlink:label="Locator_us-gaap_GuaranteeObligationsByNatureAxis_12567"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_GuaranteeObligationsNatureDomain" xlink:label="Locator_us-gaap_GuaranteeObligationsNatureDomain_12568"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_us-gaap_GuaranteeObligationsByNatureAxis_12567" xlink:to="Locator_us-gaap_GuaranteeObligationsNatureDomain_12568" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_GuaranteeObligationsNatureDomain" xlink:label="Locator_us-gaap_GuaranteeObligationsNatureDomain_12569"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SitheGuaranteeMember" xlink:label="Locator_exc_SitheGuaranteeMember_12570"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_GuaranteeObligationsNatureDomain_12569" xlink:to="Locator_exc_SitheGuaranteeMember_12570" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_GuaranteeObligationsNatureDomain" xlink:label="Locator_us-gaap_GuaranteeObligationsNatureDomain_12571"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DistrigasGuaranteeMember" xlink:label="Locator_exc_DistrigasGuaranteeMember_12572"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_GuaranteeObligationsNatureDomain_12571" xlink:to="Locator_exc_DistrigasGuaranteeMember_12572" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SupplementalCashFlowInformationTable" xlink:label="Locator_exc_SupplementalCashFlowInformationTable_12555"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementScenarioAxis" xlink:label="Locator_us-gaap_StatementScenarioAxis_12556"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_exc_SupplementalCashFlowInformationTable_12555" xlink:to="Locator_us-gaap_StatementScenarioAxis_12556" order="2.0"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementScenarioAxis" xlink:label="Locator_us-gaap_StatementScenarioAxis_12381"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScenarioUnspecifiedDomain" xlink:label="Locator_us-gaap_ScenarioUnspecifiedDomain_12382"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="Locator_us-gaap_StatementScenarioAxis_12381" xlink:to="Locator_us-gaap_ScenarioUnspecifiedDomain_12382" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementScenarioAxis" xlink:label="Locator_us-gaap_StatementScenarioAxis_12573"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScenarioUnspecifiedDomain" xlink:label="Locator_us-gaap_ScenarioUnspecifiedDomain_12574"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_us-gaap_StatementScenarioAxis_12573" xlink:to="Locator_us-gaap_ScenarioUnspecifiedDomain_12574" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScenarioUnspecifiedDomain" xlink:label="Locator_us-gaap_ScenarioUnspecifiedDomain_12575"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScenarioPreviouslyReportedMember" xlink:label="Locator_us-gaap_ScenarioPreviouslyReportedMember_12576"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_ScenarioUnspecifiedDomain_12575" xlink:to="Locator_us-gaap_ScenarioPreviouslyReportedMember_12576" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScenarioUnspecifiedDomain" xlink:label="Locator_us-gaap_ScenarioUnspecifiedDomain_12577"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RestatementAdjustmentMember" xlink:label="Locator_us-gaap_RestatementAdjustmentMember_12578"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_ScenarioUnspecifiedDomain_12577" xlink:to="Locator_us-gaap_RestatementAdjustmentMember_12578" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SupplementalCashFlowInformationLineItems" xlink:label="Locator_exc_SupplementalCashFlowInformationLineItems_12579"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DepreciationAmortizationAndAccretionNetAbstract" xlink:label="Locator_us-gaap_DepreciationAmortizationAndAccretionNetAbstract_12580"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_SupplementalCashFlowInformationLineItems_12579" xlink:to="Locator_us-gaap_DepreciationAmortizationAndAccretionNetAbstract_12580" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DepreciationAmortizationAndAccretionNetAbstract" xlink:label="Locator_us-gaap_DepreciationAmortizationAndAccretionNetAbstract_12581"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_Depreciation" xlink:label="Locator_us-gaap_Depreciation_12582"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DepreciationAmortizationAndAccretionNetAbstract_12581" xlink:to="Locator_us-gaap_Depreciation_12582" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DepreciationAmortizationAndAccretionNetAbstract" xlink:label="Locator_us-gaap_DepreciationAmortizationAndAccretionNetAbstract_12583"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AmortizationOfRegulatoryAsset" xlink:label="Locator_us-gaap_AmortizationOfRegulatoryAsset_12584"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DepreciationAmortizationAndAccretionNetAbstract_12583" xlink:to="Locator_us-gaap_AmortizationOfRegulatoryAsset_12584" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DepreciationAmortizationAndAccretionNetAbstract" xlink:label="Locator_us-gaap_DepreciationAmortizationAndAccretionNetAbstract_12585"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AmortizationOfIntangibleAssets" xlink:label="Locator_us-gaap_AmortizationOfIntangibleAssets_12586"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DepreciationAmortizationAndAccretionNetAbstract_12585" xlink:to="Locator_us-gaap_AmortizationOfIntangibleAssets_12586" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DepreciationAmortizationAndAccretionNetAbstract" xlink:label="Locator_us-gaap_DepreciationAmortizationAndAccretionNetAbstract_12587"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EnergyContractAmortization" xlink:label="Locator_exc_EnergyContractAmortization_12588"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DepreciationAmortizationAndAccretionNetAbstract_12587" xlink:to="Locator_exc_EnergyContractAmortization_12588" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DepreciationAmortizationAndAccretionNetAbstract" xlink:label="Locator_us-gaap_DepreciationAmortizationAndAccretionNetAbstract_12589"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NuclearFuelAmortization" xlink:label="Locator_exc_NuclearFuelAmortization_12590"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DepreciationAmortizationAndAccretionNetAbstract_12589" xlink:to="Locator_exc_NuclearFuelAmortization_12590" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DepreciationAmortizationAndAccretionNetAbstract" xlink:label="Locator_us-gaap_DepreciationAmortizationAndAccretionNetAbstract_12591"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AssetRetirementObligationAccretionExpense" xlink:label="Locator_us-gaap_AssetRetirementObligationAccretionExpense_12592"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DepreciationAmortizationAndAccretionNetAbstract_12591" xlink:to="Locator_us-gaap_AssetRetirementObligationAccretionExpense_12592" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DepreciationAmortizationAndAccretionNetAbstract" xlink:label="Locator_us-gaap_DepreciationAmortizationAndAccretionNetAbstract_12593"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DepreciationAmortizationAndAccretionNet" xlink:label="Locator_us-gaap_DepreciationAmortizationAndAccretionNet_12594"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DepreciationAmortizationAndAccretionNetAbstract_12593" xlink:to="Locator_us-gaap_DepreciationAmortizationAndAccretionNet_12594" order="7.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SupplementalCashFlowInformationLineItems" xlink:label="Locator_exc_SupplementalCashFlowInformationLineItems_12595"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CashPaidRefundedDuringYearAbstract" xlink:label="Locator_exc_CashPaidRefundedDuringYearAbstract_12596"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_SupplementalCashFlowInformationLineItems_12595" xlink:to="Locator_exc_CashPaidRefundedDuringYearAbstract_12596" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CashPaidRefundedDuringYearAbstract" xlink:label="Locator_exc_CashPaidRefundedDuringYearAbstract_12597"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_InterestPaidNet" xlink:label="Locator_us-gaap_InterestPaidNet_12598"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_CashPaidRefundedDuringYearAbstract_12597" xlink:to="Locator_us-gaap_InterestPaidNet_12598" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CashPaidRefundedDuringYearAbstract" xlink:label="Locator_exc_CashPaidRefundedDuringYearAbstract_12599"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_IncomeTaxesPaidNet" xlink:label="Locator_us-gaap_IncomeTaxesPaidNet_12600"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_CashPaidRefundedDuringYearAbstract_12599" xlink:to="Locator_us-gaap_IncomeTaxesPaidNet_12600" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SupplementalCashFlowInformationLineItems" xlink:label="Locator_exc_SupplementalCashFlowInformationLineItems_12601"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:label="Locator_us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_12602"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_SupplementalCashFlowInformationLineItems_12601" xlink:to="Locator_us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_12602" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:label="Locator_us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_12603"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PensionAndOtherPostretirementBenefitExpense" xlink:label="Locator_us-gaap_PensionAndOtherPostretirementBenefitExpense_12604"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_12603" xlink:to="Locator_us-gaap_PensionAndOtherPostretirementBenefitExpense_12604" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:label="Locator_us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_12605"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ProvisionForDoubtfulAccounts" xlink:label="Locator_us-gaap_ProvisionForDoubtfulAccounts_12606"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_12605" xlink:to="Locator_us-gaap_ProvisionForDoubtfulAccounts_12606" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:label="Locator_us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_12607"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_InventoryWriteDown" xlink:label="Locator_us-gaap_InventoryWriteDown_12608"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_12607" xlink:to="Locator_us-gaap_InventoryWriteDown_12608" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:label="Locator_us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_12609"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ShareBasedCompensation" xlink:label="Locator_us-gaap_ShareBasedCompensation_12610"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_12609" xlink:to="Locator_us-gaap_ShareBasedCompensation_12610" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:label="Locator_us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_12611"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OtherDecommissioningRelatedActivity" xlink:label="Locator_exc_OtherDecommissioningRelatedActivity_12612"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_12611" xlink:to="Locator_exc_OtherDecommissioningRelatedActivity_12612" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:label="Locator_us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_12613"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EnergyRelatedOptions" xlink:label="Locator_exc_EnergyRelatedOptions_12614"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_12613" xlink:to="Locator_exc_EnergyRelatedOptions_12614" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:label="Locator_us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_12615"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AssetRetirementObligationReduction" xlink:label="Locator_exc_AssetRetirementObligationReduction_12616"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_12615" xlink:to="Locator_exc_AssetRetirementObligationReduction_12616" order="7.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:label="Locator_us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_12617"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AmortizationOfRegulatoryAssetDebtCosts" xlink:label="Locator_exc_AmortizationOfRegulatoryAssetDebtCosts_12618"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_12617" xlink:to="Locator_exc_AmortizationOfRegulatoryAssetDebtCosts_12618" order="8.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:label="Locator_us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_12619"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AmortizationRateStabilizationDeferral" xlink:label="Locator_exc_AmortizationRateStabilizationDeferral_12620"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_12619" xlink:to="Locator_exc_AmortizationRateStabilizationDeferral_12620" order="9.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:label="Locator_us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_12621"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AmortizationOfDebtFairValueAdjustment" xlink:label="Locator_exc_AmortizationOfDebtFairValueAdjustment_12622"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_12621" xlink:to="Locator_exc_AmortizationOfDebtFairValueAdjustment_12622" order="10.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:label="Locator_us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_12623"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DeferralOfStormCosts" xlink:label="Locator_exc_DeferralOfStormCosts_12624"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_12623" xlink:to="Locator_exc_DeferralOfStormCosts_12624" order="11.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:label="Locator_us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_12625"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_TaxesOtherThanIncomeRefundAccrual" xlink:label="Locator_exc_TaxesOtherThanIncomeRefundAccrual_12626"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_12625" xlink:to="Locator_exc_TaxesOtherThanIncomeRefundAccrual_12626" order="12.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:label="Locator_us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_12627"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_UncollectibleAccountsRecovery" xlink:label="Locator_exc_UncollectibleAccountsRecovery_12628"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_12627" xlink:to="Locator_exc_UncollectibleAccountsRecovery_12628" order="13.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:label="Locator_us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_12629"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_InventoryAdjustmentsDuringPeriod" xlink:label="Locator_exc_InventoryAdjustmentsDuringPeriod_12630"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_12629" xlink:to="Locator_exc_InventoryAdjustmentsDuringPeriod_12630" order="14.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:label="Locator_us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_12631"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ImpactsTwoThousandTenRateCase" xlink:label="Locator_exc_ImpactsTwoThousandTenRateCase_12632"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_12631" xlink:to="Locator_exc_ImpactsTwoThousandTenRateCase_12632" order="15.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:label="Locator_us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_12633"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessCombinationBargainPurchaseGainRecognizedAmount" xlink:label="Locator_us-gaap_BusinessCombinationBargainPurchaseGainRecognizedAmount_12634"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_12633" xlink:to="Locator_us-gaap_BusinessCombinationBargainPurchaseGainRecognizedAmount_12634" order="16.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:label="Locator_us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_12635"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ImpactsEnergyInfrastructureModernizationAct" xlink:label="Locator_exc_ImpactsEnergyInfrastructureModernizationAct_12636"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_12635" xlink:to="Locator_exc_ImpactsEnergyInfrastructureModernizationAct_12636" order="17.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:label="Locator_us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_12637"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NoncashMergerRelatedCosts" xlink:label="Locator_us-gaap_NoncashMergerRelatedCosts_12638"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_12637" xlink:to="Locator_us-gaap_NoncashMergerRelatedCosts_12638" order="18.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:label="Locator_us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_12639"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_SeveranceCosts" xlink:label="Locator_us-gaap_SeveranceCosts_12640"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_12639" xlink:to="Locator_us-gaap_SeveranceCosts_12640" order="19.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:label="Locator_us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_12641"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_IncomeLossFromEquityMethodInvestments" xlink:label="Locator_us-gaap_IncomeLossFromEquityMethodInvestments_12642"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_12641" xlink:to="Locator_us-gaap_IncomeLossFromEquityMethodInvestments_12642" order="20.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:label="Locator_us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_12643"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OtherNoncashIncomeExpenseNet" xlink:label="Locator_exc_OtherNoncashIncomeExpenseNet_12644"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_12643" xlink:to="Locator_exc_OtherNoncashIncomeExpenseNet_12644" order="21.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:label="Locator_us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_12645"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities" xlink:label="Locator_us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities_12646"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_12645" xlink:to="Locator_us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities_12646" order="22.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SupplementalCashFlowInformationLineItems" xlink:label="Locator_exc_SupplementalCashFlowInformationLineItems_12647"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_IncreaseDecreaseInOtherOperatingCapitalNetAbstract" xlink:label="Locator_exc_IncreaseDecreaseInOtherOperatingCapitalNetAbstract_12648"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_SupplementalCashFlowInformationLineItems_12647" xlink:to="Locator_exc_IncreaseDecreaseInOtherOperatingCapitalNetAbstract_12648" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_IncreaseDecreaseInOtherOperatingCapitalNetAbstract" xlink:label="Locator_exc_IncreaseDecreaseInOtherOperatingCapitalNetAbstract_12649"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_IncreaseDecreaseInOverUnderEnergyRecovery" xlink:label="Locator_us-gaap_IncreaseDecreaseInOverUnderEnergyRecovery_12650"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_IncreaseDecreaseInOtherOperatingCapitalNetAbstract_12649" xlink:to="Locator_us-gaap_IncreaseDecreaseInOverUnderEnergyRecovery_12650" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_IncreaseDecreaseInOtherOperatingCapitalNetAbstract" xlink:label="Locator_exc_IncreaseDecreaseInOtherOperatingCapitalNetAbstract_12651"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OtherRegulatoryAssetsAndLiabilities" xlink:label="Locator_exc_OtherRegulatoryAssetsAndLiabilities_12652"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_IncreaseDecreaseInOtherOperatingCapitalNetAbstract_12651" xlink:to="Locator_exc_OtherRegulatoryAssetsAndLiabilities_12652" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_IncreaseDecreaseInOtherOperatingCapitalNetAbstract" xlink:label="Locator_exc_IncreaseDecreaseInOtherOperatingCapitalNetAbstract_12653"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_IncreaseDecreaseInOtherCurrentOperatingAssetsAndLiabilities" xlink:label="Locator_exc_IncreaseDecreaseInOtherCurrentOperatingAssetsAndLiabilities_12654"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_IncreaseDecreaseInOtherOperatingCapitalNetAbstract_12653" xlink:to="Locator_exc_IncreaseDecreaseInOtherCurrentOperatingAssetsAndLiabilities_12654" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_IncreaseDecreaseInOtherOperatingCapitalNetAbstract" xlink:label="Locator_exc_IncreaseDecreaseInOtherOperatingCapitalNetAbstract_12655"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_IncreaseDecreaseInOtherNoncurrentOperatingAssetsLiabilities" xlink:label="Locator_exc_IncreaseDecreaseInOtherNoncurrentOperatingAssetsLiabilities_12656"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_IncreaseDecreaseInOtherOperatingCapitalNetAbstract_12655" xlink:to="Locator_exc_IncreaseDecreaseInOtherNoncurrentOperatingAssetsLiabilities_12656" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_IncreaseDecreaseInOtherOperatingCapitalNetAbstract" xlink:label="Locator_exc_IncreaseDecreaseInOtherOperatingCapitalNetAbstract_12657"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet" xlink:label="Locator_us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet_12658"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_IncreaseDecreaseInOtherOperatingCapitalNetAbstract_12657" xlink:to="Locator_us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet_12658" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SupplementalCashFlowInformationLineItems" xlink:label="Locator_exc_SupplementalCashFlowInformationLineItems_12659"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract" xlink:label="Locator_us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract_12660"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_SupplementalCashFlowInformationLineItems_12659" xlink:to="Locator_us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract_12660" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract" xlink:label="Locator_us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract_12661"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CapitalizedCostsIncurredAssetRetirementObligation" xlink:label="Locator_exc_CapitalizedCostsIncurredAssetRetirementObligation_12662"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract_12661" xlink:to="Locator_exc_CapitalizedCostsIncurredAssetRetirementObligation_12662" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract" xlink:label="Locator_us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract_12663"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CapitalExpendituresIncurredButNotYetPaid" xlink:label="Locator_us-gaap_CapitalExpendituresIncurredButNotYetPaid_12664"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract_12663" xlink:to="Locator_us-gaap_CapitalExpendituresIncurredButNotYetPaid_12664" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract" xlink:label="Locator_us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract_12665"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NoncashPurchaseAccountingAdjustment" xlink:label="Locator_exc_NoncashPurchaseAccountingAdjustment_12666"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract_12665" xlink:to="Locator_exc_NoncashPurchaseAccountingAdjustment_12666" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract" xlink:label="Locator_us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract_12667"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StockIssued1" xlink:label="Locator_us-gaap_StockIssued1_12668"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract_12667" xlink:to="Locator_us-gaap_StockIssued1_12668" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract" xlink:label="Locator_us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract_12669"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DebtConversionOriginalDebtAmount1" xlink:label="Locator_us-gaap_DebtConversionOriginalDebtAmount1_12670"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract_12669" xlink:to="Locator_us-gaap_DebtConversionOriginalDebtAmount1_12670" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract" xlink:label="Locator_us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract_12671"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NoncashInvestingAndFinancingActivitiesTotal" xlink:label="Locator_exc_NoncashInvestingAndFinancingActivitiesTotal_12672"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract_12671" xlink:to="Locator_exc_NoncashInvestingAndFinancingActivitiesTotal_12672" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SupplementalCashFlowInformationLineItems" xlink:label="Locator_exc_SupplementalCashFlowInformationLineItems_12673"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DoeSmartGridInvestmentGrantAbstract" xlink:label="Locator_exc_DoeSmartGridInvestmentGrantAbstract_12674"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_SupplementalCashFlowInformationLineItems_12673" xlink:to="Locator_exc_DoeSmartGridInvestmentGrantAbstract_12674" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DoeSmartGridInvestmentGrantAbstract" xlink:label="Locator_exc_DoeSmartGridInvestmentGrantAbstract_12675"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SmartGridGrantProjectCapitalExpenditures" xlink:label="Locator_exc_SmartGridGrantProjectCapitalExpenditures_12676"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_DoeSmartGridInvestmentGrantAbstract_12675" xlink:to="Locator_exc_SmartGridGrantProjectCapitalExpenditures_12676" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DoeSmartGridInvestmentGrantAbstract" xlink:label="Locator_exc_DoeSmartGridInvestmentGrantAbstract_12677"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SmartGridGrantReimbursements" xlink:label="Locator_exc_SmartGridGrantReimbursements_12678"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_DoeSmartGridInvestmentGrantAbstract_12677" xlink:to="Locator_exc_SmartGridGrantReimbursements_12678" order="2.0" xbrldt:usable="true"/> |
| | </definitionLink> |
| <definitionLink xlink:type="extended" xlink:role="http://exeloncorp.com/role/SupplementalFinancialInformationBalanceSheetDetails"> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_12821"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_12822"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_dei_LegalEntityAxis_12821" xlink:to="Locator_dei_EntityDomain_12822" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_12823"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ExelonGenerationCoLLCMember" xlink:label="Locator_exc_ExelonGenerationCoLLCMember_12824"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_12823" xlink:to="Locator_exc_ExelonGenerationCoLLCMember_12824" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_12825"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CommonwealthEdisonCoMember" xlink:label="Locator_exc_CommonwealthEdisonCoMember_12826"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_12825" xlink:to="Locator_exc_CommonwealthEdisonCoMember_12826" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_12827"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PecoEnergyCoMember" xlink:label="Locator_exc_PecoEnergyCoMember_12828"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_12827" xlink:to="Locator_exc_PecoEnergyCoMember_12828" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_12829"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BaltimoreGasAndElectricCompanyMember" xlink:label="Locator_exc_BaltimoreGasAndElectricCompanyMember_12830"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_12829" xlink:to="Locator_exc_BaltimoreGasAndElectricCompanyMember_12830" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FinancingReceivableInformationByCreditQualityIndicatorAxis" xlink:label="Locator_us-gaap_FinancingReceivableInformationByCreditQualityIndicatorAxis_12709"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_InternallyAssignedGradeDomain" xlink:label="Locator_exc_InternallyAssignedGradeDomain_12710"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="Locator_us-gaap_FinancingReceivableInformationByCreditQualityIndicatorAxis_12709" xlink:to="Locator_exc_InternallyAssignedGradeDomain_12710" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FinancingReceivableInformationByCreditQualityIndicatorAxis" xlink:label="Locator_us-gaap_FinancingReceivableInformationByCreditQualityIndicatorAxis_12831"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_InternallyAssignedGradeDomain" xlink:label="Locator_exc_InternallyAssignedGradeDomain_12832"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_us-gaap_FinancingReceivableInformationByCreditQualityIndicatorAxis_12831" xlink:to="Locator_exc_InternallyAssignedGradeDomain_12832" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_InternallyAssignedGradeDomain" xlink:label="Locator_exc_InternallyAssignedGradeDomain_12833"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_LowRiskMember" xlink:label="Locator_exc_LowRiskMember_12834"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_InternallyAssignedGradeDomain_12833" xlink:to="Locator_exc_LowRiskMember_12834" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_InternallyAssignedGradeDomain" xlink:label="Locator_exc_InternallyAssignedGradeDomain_12835"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_LowToMediumRiskMember" xlink:label="Locator_exc_LowToMediumRiskMember_12836"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_InternallyAssignedGradeDomain_12835" xlink:to="Locator_exc_LowToMediumRiskMember_12836" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_InternallyAssignedGradeDomain" xlink:label="Locator_exc_InternallyAssignedGradeDomain_12837"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_MediumRiskMember" xlink:label="Locator_exc_MediumRiskMember_12838"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_InternallyAssignedGradeDomain_12837" xlink:to="Locator_exc_MediumRiskMember_12838" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_InternallyAssignedGradeDomain" xlink:label="Locator_exc_InternallyAssignedGradeDomain_12839"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_HighRiskMember" xlink:label="Locator_exc_HighRiskMember_12840"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_InternallyAssignedGradeDomain_12839" xlink:to="Locator_exc_HighRiskMember_12840" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FinancingReceivableRecordedInvestmentLineItems" xlink:label="Locator_us-gaap_FinancingReceivableRecordedInvestmentLineItems_12899"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FinancingReceivable" xlink:label="Locator_us-gaap_FinancingReceivable_12900"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_FinancingReceivableRecordedInvestmentLineItems_12899" xlink:to="Locator_us-gaap_FinancingReceivable_12900" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FinancingReceivableRecordedInvestmentLineItems" xlink:label="Locator_us-gaap_FinancingReceivableRecordedInvestmentLineItems_12901"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FinancingReceivableAllowanceForCreditLosses" xlink:label="Locator_us-gaap_FinancingReceivableAllowanceForCreditLosses_12902"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_FinancingReceivableRecordedInvestmentLineItems_12901" xlink:to="Locator_us-gaap_FinancingReceivableAllowanceForCreditLosses_12902" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_EquityMethodInvesteeNameDomain" xlink:label="Locator_us-gaap_EquityMethodInvesteeNameDomain_12841"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FinancingTrustsMember" xlink:label="Locator_exc_FinancingTrustsMember_12842"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_EquityMethodInvesteeNameDomain_12841" xlink:to="Locator_exc_FinancingTrustsMember_12842" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_EquityMethodInvesteeNameDomain" xlink:label="Locator_us-gaap_EquityMethodInvesteeNameDomain_12843"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NustartEnergyDevelopmentMember" xlink:label="Locator_exc_NustartEnergyDevelopmentMember_12844"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_EquityMethodInvesteeNameDomain_12843" xlink:to="Locator_exc_NustartEnergyDevelopmentMember_12844" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_EquityMethodInvesteeNameDomain" xlink:label="Locator_us-gaap_EquityMethodInvesteeNameDomain_12845"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_KeystoneFuelsMember" xlink:label="Locator_exc_KeystoneFuelsMember_12846"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_EquityMethodInvesteeNameDomain_12845" xlink:to="Locator_exc_KeystoneFuelsMember_12846" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_EquityMethodInvesteeNameDomain" xlink:label="Locator_us-gaap_EquityMethodInvesteeNameDomain_12847"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ConemaughFuelsMember" xlink:label="Locator_exc_ConemaughFuelsMember_12848"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_EquityMethodInvesteeNameDomain_12847" xlink:to="Locator_exc_ConemaughFuelsMember_12848" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_EquityMethodInvesteeNameDomain" xlink:label="Locator_us-gaap_EquityMethodInvesteeNameDomain_12849"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SacramentoSolarMember" xlink:label="Locator_exc_SacramentoSolarMember_12850"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_EquityMethodInvesteeNameDomain_12849" xlink:to="Locator_exc_SacramentoSolarMember_12850" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SupplementalBalanceSheetInformationLineItems" xlink:label="Locator_exc_SupplementalBalanceSheetInformationLineItems_12737"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SupplementalBalanceSheetInformationTable" xlink:label="Locator_exc_SupplementalBalanceSheetInformationTable_12738"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="Locator_exc_SupplementalBalanceSheetInformationLineItems_12737" xlink:to="Locator_exc_SupplementalBalanceSheetInformationTable_12738" order="0.5" xbrldt:contextElement="segment" xbrldt:closed="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SupplementalBalanceSheetInformationTable" xlink:label="Locator_exc_SupplementalBalanceSheetInformationTable_12813"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_12814"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_exc_SupplementalBalanceSheetInformationTable_12813" xlink:to="Locator_dei_LegalEntityAxis_12814" order="0.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SupplementalBalanceSheetInformationTable" xlink:label="Locator_exc_SupplementalBalanceSheetInformationTable_12815"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_InvestmentsAxis" xlink:label="Locator_exc_InvestmentsAxis_12816"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_exc_SupplementalBalanceSheetInformationTable_12815" xlink:to="Locator_exc_InvestmentsAxis_12816" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_InvestmentsAxis" xlink:label="Locator_exc_InvestmentsAxis_12711"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_EquityMethodInvesteeNameDomain" xlink:label="Locator_us-gaap_EquityMethodInvesteeNameDomain_12712"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="Locator_exc_InvestmentsAxis_12711" xlink:to="Locator_us-gaap_EquityMethodInvesteeNameDomain_12712" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_InvestmentsAxis" xlink:label="Locator_exc_InvestmentsAxis_12851"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_EquityMethodInvesteeNameDomain" xlink:label="Locator_us-gaap_EquityMethodInvesteeNameDomain_12852"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_exc_InvestmentsAxis_12851" xlink:to="Locator_us-gaap_EquityMethodInvesteeNameDomain_12852" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SupplementalBalanceSheetInformationTable" xlink:label="Locator_exc_SupplementalBalanceSheetInformationTable_12817"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OtherInvestmentsAxis" xlink:label="Locator_exc_OtherInvestmentsAxis_12818"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_exc_SupplementalBalanceSheetInformationTable_12817" xlink:to="Locator_exc_OtherInvestmentsAxis_12818" order="2.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OtherInvestmentsAxis" xlink:label="Locator_exc_OtherInvestmentsAxis_12713"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OtherInvestmentDomain" xlink:label="Locator_exc_OtherInvestmentDomain_12714"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="Locator_exc_OtherInvestmentsAxis_12713" xlink:to="Locator_exc_OtherInvestmentDomain_12714" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OtherInvestmentsAxis" xlink:label="Locator_exc_OtherInvestmentsAxis_12853"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OtherInvestmentDomain" xlink:label="Locator_exc_OtherInvestmentDomain_12854"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_exc_OtherInvestmentsAxis_12853" xlink:to="Locator_exc_OtherInvestmentDomain_12854" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OtherInvestmentDomain" xlink:label="Locator_exc_OtherInvestmentDomain_12855"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CapitalLeasesNetInvestmentInDirectFinancingLeasesMember" xlink:label="Locator_exc_CapitalLeasesNetInvestmentInDirectFinancingLeasesMember_12856"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_OtherInvestmentDomain_12855" xlink:to="Locator_exc_CapitalLeasesNetInvestmentInDirectFinancingLeasesMember_12856" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OtherInvestmentDomain" xlink:label="Locator_exc_OtherInvestmentDomain_12857"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_TrustForBenefitOfEmployeesMember" xlink:label="Locator_us-gaap_TrustForBenefitOfEmployeesMember_12858"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_OtherInvestmentDomain_12857" xlink:to="Locator_us-gaap_TrustForBenefitOfEmployeesMember_12858" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SupplementalBalanceSheetInformationTable" xlink:label="Locator_exc_SupplementalBalanceSheetInformationTable_12819"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FinancingReceivableInformationByCreditQualityIndicatorAxis" xlink:label="Locator_us-gaap_FinancingReceivableInformationByCreditQualityIndicatorAxis_12820"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_exc_SupplementalBalanceSheetInformationTable_12819" xlink:to="Locator_us-gaap_FinancingReceivableInformationByCreditQualityIndicatorAxis_12820" order="3.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SupplementalBalanceSheetInformationLineItems" xlink:label="Locator_exc_SupplementalBalanceSheetInformationLineItems_12859"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_InvestmentsAbstract" xlink:label="Locator_us-gaap_InvestmentsAbstract_12860"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_SupplementalBalanceSheetInformationLineItems_12859" xlink:to="Locator_us-gaap_InvestmentsAbstract_12860" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_InvestmentsAbstract" xlink:label="Locator_us-gaap_InvestmentsAbstract_12861"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVenturesAbstract" xlink:label="Locator_us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVenturesAbstract_12862"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_InvestmentsAbstract_12861" xlink:to="Locator_us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVenturesAbstract_12862" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVenturesAbstract" xlink:label="Locator_us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVenturesAbstract_12863"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_EquityMethodInvestments" xlink:label="Locator_us-gaap_EquityMethodInvestments_12864"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVenturesAbstract_12863" xlink:to="Locator_us-gaap_EquityMethodInvestments_12864" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_InvestmentsAbstract" xlink:label="Locator_us-gaap_InvestmentsAbstract_12865"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherInvestmentsAbstract" xlink:label="Locator_us-gaap_OtherInvestmentsAbstract_12866"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_InvestmentsAbstract_12865" xlink:to="Locator_us-gaap_OtherInvestmentsAbstract_12866" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherInvestmentsAbstract" xlink:label="Locator_us-gaap_OtherInvestmentsAbstract_12867"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherInvestments" xlink:label="Locator_us-gaap_OtherInvestments_12868"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_OtherInvestmentsAbstract_12867" xlink:to="Locator_us-gaap_OtherInvestments_12868" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_InvestmentsAbstract" xlink:label="Locator_us-gaap_InvestmentsAbstract_12869"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_TotalLongTermInvestments" xlink:label="Locator_exc_TotalLongTermInvestments_12870"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_InvestmentsAbstract_12869" xlink:to="Locator_exc_TotalLongTermInvestments_12870" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SupplementalBalanceSheetInformationLineItems" xlink:label="Locator_exc_SupplementalBalanceSheetInformationLineItems_12871"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SupplementalFinancialInformationTextualsAbstract" xlink:label="Locator_exc_SupplementalFinancialInformationTextualsAbstract_12872"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_SupplementalBalanceSheetInformationLineItems_12871" xlink:to="Locator_exc_SupplementalFinancialInformationTextualsAbstract_12872" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SupplementalFinancialInformationTextualsAbstract" xlink:label="Locator_exc_SupplementalFinancialInformationTextualsAbstract_12873"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PreliminarySettlementPaymentToIrs" xlink:label="Locator_exc_PreliminarySettlementPaymentToIrs_12874"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_SupplementalFinancialInformationTextualsAbstract_12873" xlink:to="Locator_exc_PreliminarySettlementPaymentToIrs_12874" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SupplementalBalanceSheetInformationLineItems" xlink:label="Locator_exc_SupplementalBalanceSheetInformationLineItems_12875"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CapitalLeasesNetInvestmentInDirectFinancingLeasesAbstract" xlink:label="Locator_us-gaap_CapitalLeasesNetInvestmentInDirectFinancingLeasesAbstract_12876"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_SupplementalBalanceSheetInformationLineItems_12875" xlink:to="Locator_us-gaap_CapitalLeasesNetInvestmentInDirectFinancingLeasesAbstract_12876" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CapitalLeasesNetInvestmentInDirectFinancingLeasesAbstract" xlink:label="Locator_us-gaap_CapitalLeasesNetInvestmentInDirectFinancingLeasesAbstract_12877"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CapitalLeasesNetInvestmentInDirectFinancingLeasesUnguaranteedResidualValuesOfLeasedProperty" xlink:label="Locator_us-gaap_CapitalLeasesNetInvestmentInDirectFinancingLeasesUnguaranteedResidualValuesOfLeasedProperty_12878"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_CapitalLeasesNetInvestmentInDirectFinancingLeasesAbstract_12877" xlink:to="Locator_us-gaap_CapitalLeasesNetInvestmentInDirectFinancingLeasesUnguaranteedResidualValuesOfLeasedProperty_12878" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CapitalLeasesNetInvestmentInDirectFinancingLeasesAbstract" xlink:label="Locator_us-gaap_CapitalLeasesNetInvestmentInDirectFinancingLeasesAbstract_12879"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CapitalLeasesNetInvestmentInDirectFinancingLeasesDeferredIncome" xlink:label="Locator_us-gaap_CapitalLeasesNetInvestmentInDirectFinancingLeasesDeferredIncome_12880"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_CapitalLeasesNetInvestmentInDirectFinancingLeasesAbstract_12879" xlink:to="Locator_us-gaap_CapitalLeasesNetInvestmentInDirectFinancingLeasesDeferredIncome_12880" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CapitalLeasesNetInvestmentInDirectFinancingLeasesAbstract" xlink:label="Locator_us-gaap_CapitalLeasesNetInvestmentInDirectFinancingLeasesAbstract_12881"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CapitalLeasesNetInvestmentInDirectFinancingLeases" xlink:label="Locator_us-gaap_CapitalLeasesNetInvestmentInDirectFinancingLeases_12882"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_CapitalLeasesNetInvestmentInDirectFinancingLeasesAbstract_12881" xlink:to="Locator_us-gaap_CapitalLeasesNetInvestmentInDirectFinancingLeases_12882" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SupplementalBalanceSheetInformationLineItems" xlink:label="Locator_exc_SupplementalBalanceSheetInformationLineItems_12883"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AccruedLiabilitiesCurrentAbstract" xlink:label="Locator_us-gaap_AccruedLiabilitiesCurrentAbstract_12884"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_SupplementalBalanceSheetInformationLineItems_12883" xlink:to="Locator_us-gaap_AccruedLiabilitiesCurrentAbstract_12884" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AccruedLiabilitiesCurrentAbstract" xlink:label="Locator_us-gaap_AccruedLiabilitiesCurrentAbstract_12885"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AccruedCompensationCurrent" xlink:label="Locator_exc_AccruedCompensationCurrent_12886"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_AccruedLiabilitiesCurrentAbstract_12885" xlink:to="Locator_exc_AccruedCompensationCurrent_12886" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AccruedLiabilitiesCurrentAbstract" xlink:label="Locator_us-gaap_AccruedLiabilitiesCurrentAbstract_12887"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_TaxesPayableCurrent" xlink:label="Locator_us-gaap_TaxesPayableCurrent_12888"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_AccruedLiabilitiesCurrentAbstract_12887" xlink:to="Locator_us-gaap_TaxesPayableCurrent_12888" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AccruedLiabilitiesCurrentAbstract" xlink:label="Locator_us-gaap_AccruedLiabilitiesCurrentAbstract_12889"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_InterestPayableCurrent" xlink:label="Locator_us-gaap_InterestPayableCurrent_12890"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_AccruedLiabilitiesCurrentAbstract_12889" xlink:to="Locator_us-gaap_InterestPayableCurrent_12890" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AccruedLiabilitiesCurrentAbstract" xlink:label="Locator_us-gaap_AccruedLiabilitiesCurrentAbstract_12891"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AccruedSeveranceCurrent" xlink:label="Locator_exc_AccruedSeveranceCurrent_12892"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_AccruedLiabilitiesCurrentAbstract_12891" xlink:to="Locator_exc_AccruedSeveranceCurrent_12892" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AccruedLiabilitiesCurrentAbstract" xlink:label="Locator_us-gaap_AccruedLiabilitiesCurrentAbstract_12893"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherAccruedLiabilitiesCurrent" xlink:label="Locator_us-gaap_OtherAccruedLiabilitiesCurrent_12894"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_AccruedLiabilitiesCurrentAbstract_12893" xlink:to="Locator_us-gaap_OtherAccruedLiabilitiesCurrent_12894" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AccruedLiabilitiesCurrentAbstract" xlink:label="Locator_us-gaap_AccruedLiabilitiesCurrentAbstract_12895"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AccruedLiabilitiesCurrent" xlink:label="Locator_us-gaap_AccruedLiabilitiesCurrent_12896"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_AccruedLiabilitiesCurrentAbstract_12895" xlink:to="Locator_us-gaap_AccruedLiabilitiesCurrent_12896" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SupplementalBalanceSheetInformationLineItems" xlink:label="Locator_exc_SupplementalBalanceSheetInformationLineItems_12897"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FinancingReceivableRecordedInvestmentLineItems" xlink:label="Locator_us-gaap_FinancingReceivableRecordedInvestmentLineItems_12898"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_SupplementalBalanceSheetInformationLineItems_12897" xlink:to="Locator_us-gaap_FinancingReceivableRecordedInvestmentLineItems_12898" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SupplementalBalanceSheetInformationLineItems" xlink:label="Locator_exc_SupplementalBalanceSheetInformationLineItems_12903"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PropertyPlantAndEquipmentNetAbstract" xlink:label="Locator_us-gaap_PropertyPlantAndEquipmentNetAbstract_12904"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_SupplementalBalanceSheetInformationLineItems_12903" xlink:to="Locator_us-gaap_PropertyPlantAndEquipmentNetAbstract_12904" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PropertyPlantAndEquipmentNetAbstract" xlink:label="Locator_us-gaap_PropertyPlantAndEquipmentNetAbstract_12905"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment" xlink:label="Locator_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_12906"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_PropertyPlantAndEquipmentNetAbstract_12905" xlink:to="Locator_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_12906" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PropertyPlantAndEquipmentNetAbstract" xlink:label="Locator_us-gaap_PropertyPlantAndEquipmentNetAbstract_12907"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AccumulatedAmortizationNuclearFuel" xlink:label="Locator_exc_AccumulatedAmortizationNuclearFuel_12908"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_PropertyPlantAndEquipmentNetAbstract_12907" xlink:to="Locator_exc_AccumulatedAmortizationNuclearFuel_12908" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SupplementalBalanceSheetInformationLineItems" xlink:label="Locator_exc_SupplementalBalanceSheetInformationLineItems_12909"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AccountsReceivableNetCurrentAbstract" xlink:label="Locator_us-gaap_AccountsReceivableNetCurrentAbstract_12910"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_SupplementalBalanceSheetInformationLineItems_12909" xlink:to="Locator_us-gaap_AccountsReceivableNetCurrentAbstract_12910" order="7.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AccountsReceivableNetCurrentAbstract" xlink:label="Locator_us-gaap_AccountsReceivableNetCurrentAbstract_12911"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent" xlink:label="Locator_us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent_12912"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_AccountsReceivableNetCurrentAbstract_12911" xlink:to="Locator_us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent_12912" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SupplementalBalanceSheetInformationLineItems" xlink:label="Locator_exc_SupplementalBalanceSheetInformationLineItems_12913"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTaxAbstract" xlink:label="Locator_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTaxAbstract_12914"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_SupplementalBalanceSheetInformationLineItems_12913" xlink:to="Locator_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTaxAbstract_12914" order="8.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTaxAbstract" xlink:label="Locator_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTaxAbstract_12915"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectNetOfTax" xlink:label="Locator_us-gaap_AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectNetOfTax_12916"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTaxAbstract_12915" xlink:to="Locator_us-gaap_AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectNetOfTax_12916" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTaxAbstract" xlink:label="Locator_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTaxAbstract_12917"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax" xlink:label="Locator_us-gaap_AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax_12918"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTaxAbstract_12917" xlink:to="Locator_us-gaap_AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax_12918" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTaxAbstract" xlink:label="Locator_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTaxAbstract_12919"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OtherComprehensiveLossNetUnrealizedLossesOnForeignCurrencyTranslation" xlink:label="Locator_exc_OtherComprehensiveLossNetUnrealizedLossesOnForeignCurrencyTranslation_12920"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTaxAbstract_12919" xlink:to="Locator_exc_OtherComprehensiveLossNetUnrealizedLossesOnForeignCurrencyTranslation_12920" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTaxAbstract" xlink:label="Locator_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTaxAbstract_12921"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OtherComprehensiveLossEquityInvestmentCeng" xlink:label="Locator_exc_OtherComprehensiveLossEquityInvestmentCeng_12922"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTaxAbstract_12921" xlink:to="Locator_exc_OtherComprehensiveLossEquityInvestmentCeng_12922" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTaxAbstract" xlink:label="Locator_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTaxAbstract_12923"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OtherComprehensiveLossRelatedToOtherEquityMethodInvestees" xlink:label="Locator_exc_OtherComprehensiveLossRelatedToOtherEquityMethodInvestees_12924"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTaxAbstract_12923" xlink:to="Locator_exc_OtherComprehensiveLossRelatedToOtherEquityMethodInvestees_12924" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTaxAbstract" xlink:label="Locator_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTaxAbstract_12925"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AccumulatedUnrealizedGainLossMarketableSecurities" xlink:label="Locator_exc_AccumulatedUnrealizedGainLossMarketableSecurities_12926"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTaxAbstract_12925" xlink:to="Locator_exc_AccumulatedUnrealizedGainLossMarketableSecurities_12926" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTaxAbstract" xlink:label="Locator_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTaxAbstract_12927"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax" xlink:label="Locator_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_12928"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTaxAbstract_12927" xlink:to="Locator_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_12928" order="7.0" xbrldt:usable="true"/> |
| | </definitionLink> |
| <definitionLink xlink:type="extended" xlink:role="http://exeloncorp.com/role/GoodwillDetails"> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_13003"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_13004"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_dei_LegalEntityAxis_13003" xlink:to="Locator_dei_EntityDomain_13004" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_13005"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ExelonGenerationCoLLCMember" xlink:label="Locator_exc_ExelonGenerationCoLLCMember_13006"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_13005" xlink:to="Locator_exc_ExelonGenerationCoLLCMember_13006" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_13007"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CommonwealthEdisonCoMember" xlink:label="Locator_exc_CommonwealthEdisonCoMember_13008"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_13007" xlink:to="Locator_exc_CommonwealthEdisonCoMember_13008" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_13009"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PecoEnergyCoMember" xlink:label="Locator_exc_PecoEnergyCoMember_13010"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_13009" xlink:to="Locator_exc_PecoEnergyCoMember_13010" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_13011"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BaltimoreGasAndElectricCompanyMember" xlink:label="Locator_exc_BaltimoreGasAndElectricCompanyMember_13012"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_13011" xlink:to="Locator_exc_BaltimoreGasAndElectricCompanyMember_13012" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_GoodwillByComponentAxis" xlink:label="Locator_exc_GoodwillByComponentAxis_13013"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_GoodwillComponentDomain" xlink:label="Locator_exc_GoodwillComponentDomain_13014"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_exc_GoodwillByComponentAxis_13013" xlink:to="Locator_exc_GoodwillComponentDomain_13014" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_GoodwillComponentDomain" xlink:label="Locator_exc_GoodwillComponentDomain_13015"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_GoodwillGrossMember" xlink:label="Locator_exc_GoodwillGrossMember_13016"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_GoodwillComponentDomain_13015" xlink:to="Locator_exc_GoodwillGrossMember_13016" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_GoodwillComponentDomain" xlink:label="Locator_exc_GoodwillComponentDomain_13017"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_GoodwillAccumulatedImpairmentLossesMember" xlink:label="Locator_exc_GoodwillAccumulatedImpairmentLossesMember_13018"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_GoodwillComponentDomain_13017" xlink:to="Locator_exc_GoodwillAccumulatedImpairmentLossesMember_13018" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RangeAxis" xlink:label="Locator_us-gaap_RangeAxis_13019"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RangeMember" xlink:label="Locator_us-gaap_RangeMember_13020"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_us-gaap_RangeAxis_13019" xlink:to="Locator_us-gaap_RangeMember_13020" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RangeMember" xlink:label="Locator_us-gaap_RangeMember_13021"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_MaximumMember" xlink:label="Locator_us-gaap_MaximumMember_13022"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RangeMember_13021" xlink:to="Locator_us-gaap_MaximumMember_13022" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RangeMember" xlink:label="Locator_us-gaap_RangeMember_13023"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_MinimumMember" xlink:label="Locator_us-gaap_MinimumMember_13024"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_RangeMember_13023" xlink:to="Locator_us-gaap_MinimumMember_13024" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_GoodwillLineItems" xlink:label="Locator_us-gaap_GoodwillLineItems_12981"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScheduleOfGoodwillTable" xlink:label="Locator_us-gaap_ScheduleOfGoodwillTable_12982"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="Locator_us-gaap_GoodwillLineItems_12981" xlink:to="Locator_us-gaap_ScheduleOfGoodwillTable_12982" order="0.5" xbrldt:contextElement="segment" xbrldt:closed="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScheduleOfGoodwillTable" xlink:label="Locator_us-gaap_ScheduleOfGoodwillTable_12997"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_12998"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_us-gaap_ScheduleOfGoodwillTable_12997" xlink:to="Locator_dei_LegalEntityAxis_12998" order="0.0"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScheduleOfGoodwillTable" xlink:label="Locator_us-gaap_ScheduleOfGoodwillTable_12999"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_GoodwillByComponentAxis" xlink:label="Locator_exc_GoodwillByComponentAxis_13000"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_us-gaap_ScheduleOfGoodwillTable_12999" xlink:to="Locator_exc_GoodwillByComponentAxis_13000" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScheduleOfGoodwillTable" xlink:label="Locator_us-gaap_ScheduleOfGoodwillTable_13001"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RangeAxis" xlink:label="Locator_us-gaap_RangeAxis_13002"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_us-gaap_ScheduleOfGoodwillTable_13001" xlink:to="Locator_us-gaap_RangeAxis_13002" order="2.0"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_GoodwillLineItems" xlink:label="Locator_us-gaap_GoodwillLineItems_13025"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_GoodwillImpairedAbstract" xlink:label="Locator_us-gaap_GoodwillImpairedAbstract_13026"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_GoodwillLineItems_13025" xlink:to="Locator_us-gaap_GoodwillImpairedAbstract_13026" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_GoodwillImpairedAbstract" xlink:label="Locator_us-gaap_GoodwillImpairedAbstract_13027"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_GoodwillImpairedFactsAndCircumstancesLeadingToImpairment" xlink:label="Locator_us-gaap_GoodwillImpairedFactsAndCircumstancesLeadingToImpairment_13028"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_GoodwillImpairedAbstract_13027" xlink:to="Locator_us-gaap_GoodwillImpairedFactsAndCircumstancesLeadingToImpairment_13028" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_GoodwillImpairedAbstract" xlink:label="Locator_us-gaap_GoodwillImpairedAbstract_13029"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AnnualRevenueRequirementReduction" xlink:label="Locator_exc_AnnualRevenueRequirementReduction_13030"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_GoodwillImpairedAbstract_13029" xlink:to="Locator_exc_AnnualRevenueRequirementReduction_13030" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_GoodwillImpairedAbstract" xlink:label="Locator_us-gaap_GoodwillImpairedAbstract_13031"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AnnualRevenueRequirmentReductionDueToPensionAndYearEndRateBase" xlink:label="Locator_exc_AnnualRevenueRequirmentReductionDueToPensionAndYearEndRateBase_13032"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_GoodwillImpairedAbstract_13031" xlink:to="Locator_exc_AnnualRevenueRequirmentReductionDueToPensionAndYearEndRateBase_13032" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_GoodwillImpairedAbstract" xlink:label="Locator_us-gaap_GoodwillImpairedAbstract_13033"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValuePercentageDecreaseForGoodwillImpairment" xlink:label="Locator_exc_FairValuePercentageDecreaseForGoodwillImpairment_13034"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_GoodwillImpairedAbstract_13033" xlink:to="Locator_exc_FairValuePercentageDecreaseForGoodwillImpairment_13034" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_GoodwillLineItems" xlink:label="Locator_us-gaap_GoodwillLineItems_13035"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_GoodwillRollForward" xlink:label="Locator_us-gaap_GoodwillRollForward_13036"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_GoodwillLineItems_13035" xlink:to="Locator_us-gaap_GoodwillRollForward_13036" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_GoodwillRollForward" xlink:label="Locator_us-gaap_GoodwillRollForward_13037"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_Goodwill" xlink:label="Locator_us-gaap_Goodwill_13038"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_GoodwillRollForward_13037" xlink:to="Locator_us-gaap_Goodwill_13038" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_GoodwillRollForward" xlink:label="Locator_us-gaap_GoodwillRollForward_13039"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_GoodwillImpairmentLoss" xlink:label="Locator_us-gaap_GoodwillImpairmentLoss_13040"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_GoodwillRollForward_13039" xlink:to="Locator_us-gaap_GoodwillImpairmentLoss_13040" order="2.0" xbrldt:usable="true"/> |
| | </definitionLink> |
| <definitionLink xlink:type="extended" xlink:role="http://exeloncorp.com/role/RetirementBenefitsAssumptionsUsedInCalculationsDetails"> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FutureDefinedBenefitPlanAssumptionsAxis" xlink:label="Locator_exc_FutureDefinedBenefitPlanAssumptionsAxis_13101"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FiveYearDisclosureDomain" xlink:label="Locator_us-gaap_FiveYearDisclosureDomain_13102"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_exc_FutureDefinedBenefitPlanAssumptionsAxis_13101" xlink:to="Locator_us-gaap_FiveYearDisclosureDomain_13102" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FiveYearDisclosureDomain" xlink:label="Locator_us-gaap_FiveYearDisclosureDomain_13111"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_MoreThanFourAndWithinFiveYearsFromBalanceSheetDateMember" xlink:label="Locator_us-gaap_MoreThanFourAndWithinFiveYearsFromBalanceSheetDateMember_13112"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_FiveYearDisclosureDomain_13111" xlink:to="Locator_us-gaap_MoreThanFourAndWithinFiveYearsFromBalanceSheetDateMember_13112" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FiveYearDisclosureDomain" xlink:label="Locator_us-gaap_FiveYearDisclosureDomain_13113"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_MoreThanFiveYearsFromBalanceSheetDateAndThereafterMember" xlink:label="Locator_us-gaap_MoreThanFiveYearsFromBalanceSheetDateAndThereafterMember_13114"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_FiveYearDisclosureDomain_13113" xlink:to="Locator_us-gaap_MoreThanFiveYearsFromBalanceSheetDateAndThereafterMember_13114" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FiveYearDisclosureDomain" xlink:label="Locator_us-gaap_FiveYearDisclosureDomain_13103"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OneYearFromBalanceSheetDateMember" xlink:label="Locator_us-gaap_OneYearFromBalanceSheetDateMember_13104"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_FiveYearDisclosureDomain_13103" xlink:to="Locator_us-gaap_OneYearFromBalanceSheetDateMember_13104" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FiveYearDisclosureDomain" xlink:label="Locator_us-gaap_FiveYearDisclosureDomain_13105"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_MoreThanOneAndWithinTwoYearsFromBalanceSheetDateMember" xlink:label="Locator_us-gaap_MoreThanOneAndWithinTwoYearsFromBalanceSheetDateMember_13106"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_FiveYearDisclosureDomain_13105" xlink:to="Locator_us-gaap_MoreThanOneAndWithinTwoYearsFromBalanceSheetDateMember_13106" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FiveYearDisclosureDomain" xlink:label="Locator_us-gaap_FiveYearDisclosureDomain_13107"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_MoreThanTwoAndWithinThreeYearsFromBalanceSheetDateMember" xlink:label="Locator_us-gaap_MoreThanTwoAndWithinThreeYearsFromBalanceSheetDateMember_13108"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_FiveYearDisclosureDomain_13107" xlink:to="Locator_us-gaap_MoreThanTwoAndWithinThreeYearsFromBalanceSheetDateMember_13108" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FiveYearDisclosureDomain" xlink:label="Locator_us-gaap_FiveYearDisclosureDomain_13109"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_MoreThanThreeAndWithinFourYearsFromBalanceSheetDateMember" xlink:label="Locator_us-gaap_MoreThanThreeAndWithinFourYearsFromBalanceSheetDateMember_13110"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_FiveYearDisclosureDomain_13109" xlink:to="Locator_us-gaap_MoreThanThreeAndWithinFourYearsFromBalanceSheetDateMember_13110" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanAssumptionsUsedInCalculationsLineItems" xlink:label="Locator_exc_DefinedBenefitPlanAssumptionsUsedInCalculationsLineItems_13075"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanAssumptionsUsedInCalculationsTable" xlink:label="Locator_exc_DefinedBenefitPlanAssumptionsUsedInCalculationsTable_13076"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="Locator_exc_DefinedBenefitPlanAssumptionsUsedInCalculationsLineItems_13075" xlink:to="Locator_exc_DefinedBenefitPlanAssumptionsUsedInCalculationsTable_13076" order="0.5" xbrldt:contextElement="segment" xbrldt:closed="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanAssumptionsUsedInCalculationsTable" xlink:label="Locator_exc_DefinedBenefitPlanAssumptionsUsedInCalculationsTable_13095"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis" xlink:label="Locator_us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis_13096"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_exc_DefinedBenefitPlanAssumptionsUsedInCalculationsTable_13095" xlink:to="Locator_us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis_13096" order="0.0"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis" xlink:label="Locator_us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis_13115"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlansDomain" xlink:label="Locator_us-gaap_DefinedBenefitPlansDomain_13116"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis_13115" xlink:to="Locator_us-gaap_DefinedBenefitPlansDomain_13116" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlansDomain" xlink:label="Locator_us-gaap_DefinedBenefitPlansDomain_13117"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PensionPlansDefinedBenefitMember" xlink:label="Locator_us-gaap_PensionPlansDefinedBenefitMember_13118"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DefinedBenefitPlansDomain_13117" xlink:to="Locator_us-gaap_PensionPlansDefinedBenefitMember_13118" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlansDomain" xlink:label="Locator_us-gaap_DefinedBenefitPlansDomain_13119"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember" xlink:label="Locator_us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_13120"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DefinedBenefitPlansDomain_13119" xlink:to="Locator_us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_13120" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanAssumptionsUsedInCalculationsTable" xlink:label="Locator_exc_DefinedBenefitPlanAssumptionsUsedInCalculationsTable_13097"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FutureDefinedBenefitPlanAssumptionsAxis" xlink:label="Locator_exc_FutureDefinedBenefitPlanAssumptionsAxis_13098"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_exc_DefinedBenefitPlanAssumptionsUsedInCalculationsTable_13097" xlink:to="Locator_exc_FutureDefinedBenefitPlanAssumptionsAxis_13098" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanAssumptionsUsedInCalculationsTable" xlink:label="Locator_exc_DefinedBenefitPlanAssumptionsUsedInCalculationsTable_13099"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanLegacyAxis" xlink:label="Locator_exc_DefinedBenefitPlanLegacyAxis_13100"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_exc_DefinedBenefitPlanAssumptionsUsedInCalculationsTable_13099" xlink:to="Locator_exc_DefinedBenefitPlanLegacyAxis_13100" order="2.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanLegacyAxis" xlink:label="Locator_exc_DefinedBenefitPlanLegacyAxis_13121"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanLegacyDomain" xlink:label="Locator_exc_DefinedBenefitPlanLegacyDomain_13122"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_exc_DefinedBenefitPlanLegacyAxis_13121" xlink:to="Locator_exc_DefinedBenefitPlanLegacyDomain_13122" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanLegacyDomain" xlink:label="Locator_exc_DefinedBenefitPlanLegacyDomain_13123"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ExelonLegacyBenefitPlansMember" xlink:label="Locator_exc_ExelonLegacyBenefitPlansMember_13124"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_DefinedBenefitPlanLegacyDomain_13123" xlink:to="Locator_exc_ExelonLegacyBenefitPlansMember_13124" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanLegacyDomain" xlink:label="Locator_exc_DefinedBenefitPlanLegacyDomain_13125"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ConstellationLegacyBenefitPlansMember" xlink:label="Locator_exc_ConstellationLegacyBenefitPlansMember_13126"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_DefinedBenefitPlanLegacyDomain_13125" xlink:to="Locator_exc_ConstellationLegacyBenefitPlansMember_13126" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanAssumptionsUsedInCalculationsLineItems" xlink:label="Locator_exc_DefinedBenefitPlanAssumptionsUsedInCalculationsLineItems_13127"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanWeightedAverageAssumptionsUsedInCalculatingBenefitObligationAbstract" xlink:label="Locator_us-gaap_DefinedBenefitPlanWeightedAverageAssumptionsUsedInCalculatingBenefitObligationAbstract_13128"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_DefinedBenefitPlanAssumptionsUsedInCalculationsLineItems_13127" xlink:to="Locator_us-gaap_DefinedBenefitPlanWeightedAverageAssumptionsUsedInCalculatingBenefitObligationAbstract_13128" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanWeightedAverageAssumptionsUsedInCalculatingBenefitObligationAbstract" xlink:label="Locator_us-gaap_DefinedBenefitPlanWeightedAverageAssumptionsUsedInCalculatingBenefitObligationAbstract_13129"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate" xlink:label="Locator_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate_13130"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DefinedBenefitPlanWeightedAverageAssumptionsUsedInCalculatingBenefitObligationAbstract_13129" xlink:to="Locator_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate_13130" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanWeightedAverageAssumptionsUsedInCalculatingBenefitObligationAbstract" xlink:label="Locator_us-gaap_DefinedBenefitPlanWeightedAverageAssumptionsUsedInCalculatingBenefitObligationAbstract_13131"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfCompensationIncrease" xlink:label="Locator_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfCompensationIncrease_13132"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DefinedBenefitPlanWeightedAverageAssumptionsUsedInCalculatingBenefitObligationAbstract_13131" xlink:to="Locator_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfCompensationIncrease_13132" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanWeightedAverageAssumptionsUsedInCalculatingBenefitObligationAbstract" xlink:label="Locator_us-gaap_DefinedBenefitPlanWeightedAverageAssumptionsUsedInCalculatingBenefitObligationAbstract_13133"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationHealthCareCostTrendRateAssumedForNextFiscalYear" xlink:label="Locator_exc_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationHealthCareCostTrendRateAssumedForNextFiscalYear_13134"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DefinedBenefitPlanWeightedAverageAssumptionsUsedInCalculatingBenefitObligationAbstract_13133" xlink:to="Locator_exc_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationHealthCareCostTrendRateAssumedForNextFiscalYear_13134" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanAssumptionsUsedInCalculationsLineItems" xlink:label="Locator_exc_DefinedBenefitPlanAssumptionsUsedInCalculationsLineItems_13135"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanWeightedAverageAssumptionsUsedInCalculatingNetPeriodicBenefitCostAbstract" xlink:label="Locator_us-gaap_DefinedBenefitPlanWeightedAverageAssumptionsUsedInCalculatingNetPeriodicBenefitCostAbstract_13136"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_DefinedBenefitPlanAssumptionsUsedInCalculationsLineItems_13135" xlink:to="Locator_us-gaap_DefinedBenefitPlanWeightedAverageAssumptionsUsedInCalculatingNetPeriodicBenefitCostAbstract_13136" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanWeightedAverageAssumptionsUsedInCalculatingNetPeriodicBenefitCostAbstract" xlink:label="Locator_us-gaap_DefinedBenefitPlanWeightedAverageAssumptionsUsedInCalculatingNetPeriodicBenefitCostAbstract_13137"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets" xlink:label="Locator_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets_13138"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DefinedBenefitPlanWeightedAverageAssumptionsUsedInCalculatingNetPeriodicBenefitCostAbstract_13137" xlink:to="Locator_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets_13138" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanWeightedAverageAssumptionsUsedInCalculatingNetPeriodicBenefitCostAbstract" xlink:label="Locator_us-gaap_DefinedBenefitPlanWeightedAverageAssumptionsUsedInCalculatingNetPeriodicBenefitCostAbstract_13139"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssetsFromAcquisitionEntity" xlink:label="Locator_exc_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssetsFromAcquisitionEntity_13140"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DefinedBenefitPlanWeightedAverageAssumptionsUsedInCalculatingNetPeriodicBenefitCostAbstract_13139" xlink:to="Locator_exc_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssetsFromAcquisitionEntity_13140" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanWeightedAverageAssumptionsUsedInCalculatingNetPeriodicBenefitCostAbstract" xlink:label="Locator_us-gaap_DefinedBenefitPlanWeightedAverageAssumptionsUsedInCalculatingNetPeriodicBenefitCostAbstract_13141"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate" xlink:label="Locator_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate_13142"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DefinedBenefitPlanWeightedAverageAssumptionsUsedInCalculatingNetPeriodicBenefitCostAbstract_13141" xlink:to="Locator_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate_13142" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanWeightedAverageAssumptionsUsedInCalculatingNetPeriodicBenefitCostAbstract" xlink:label="Locator_us-gaap_DefinedBenefitPlanWeightedAverageAssumptionsUsedInCalculatingNetPeriodicBenefitCostAbstract_13143"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRateFromAcquisitionEntity" xlink:label="Locator_exc_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRateFromAcquisitionEntity_13144"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DefinedBenefitPlanWeightedAverageAssumptionsUsedInCalculatingNetPeriodicBenefitCostAbstract_13143" xlink:to="Locator_exc_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRateFromAcquisitionEntity_13144" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanWeightedAverageAssumptionsUsedInCalculatingNetPeriodicBenefitCostAbstract" xlink:label="Locator_us-gaap_DefinedBenefitPlanWeightedAverageAssumptionsUsedInCalculatingNetPeriodicBenefitCostAbstract_13145"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostRateOfCompensationIncrease" xlink:label="Locator_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostRateOfCompensationIncrease_13146"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DefinedBenefitPlanWeightedAverageAssumptionsUsedInCalculatingNetPeriodicBenefitCostAbstract_13145" xlink:to="Locator_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostRateOfCompensationIncrease_13146" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanWeightedAverageAssumptionsUsedInCalculatingNetPeriodicBenefitCostAbstract" xlink:label="Locator_us-gaap_DefinedBenefitPlanWeightedAverageAssumptionsUsedInCalculatingNetPeriodicBenefitCostAbstract_13147"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitHealthCareCostTrendRateAssumedForNextFiscalYear" xlink:label="Locator_exc_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitHealthCareCostTrendRateAssumedForNextFiscalYear_13148"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DefinedBenefitPlanWeightedAverageAssumptionsUsedInCalculatingNetPeriodicBenefitCostAbstract_13147" xlink:to="Locator_exc_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitHealthCareCostTrendRateAssumedForNextFiscalYear_13148" order="6.0" xbrldt:usable="true"/> |
| | </definitionLink> |
| <definitionLink xlink:type="extended" xlink:role="http://exeloncorp.com/role/RetirementBenefitsFairValueRecurringBasisDetails"> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueDefinedBenefitPlanMeasuredOnRecurringBasisDisclosureItemsAxis" xlink:label="Locator_exc_FairValueDefinedBenefitPlanMeasuredOnRecurringBasisDisclosureItemsAxis_13289"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueDefinedBenefitPlanMeasuredOnRecurringBasisDisclosureItemsDomain" xlink:label="Locator_exc_FairValueDefinedBenefitPlanMeasuredOnRecurringBasisDisclosureItemsDomain_13290"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_exc_FairValueDefinedBenefitPlanMeasuredOnRecurringBasisDisclosureItemsAxis_13289" xlink:to="Locator_exc_FairValueDefinedBenefitPlanMeasuredOnRecurringBasisDisclosureItemsDomain_13290" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueDefinedBenefitPlanMeasuredOnRecurringBasisDisclosureItemsDomain" xlink:label="Locator_exc_FairValueDefinedBenefitPlanMeasuredOnRecurringBasisDisclosureItemsDomain_13291"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FairValueInputsLevel1Member" xlink:label="Locator_us-gaap_FairValueInputsLevel1Member_13292"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FairValueDefinedBenefitPlanMeasuredOnRecurringBasisDisclosureItemsDomain_13291" xlink:to="Locator_us-gaap_FairValueInputsLevel1Member_13292" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueDefinedBenefitPlanMeasuredOnRecurringBasisDisclosureItemsDomain" xlink:label="Locator_exc_FairValueDefinedBenefitPlanMeasuredOnRecurringBasisDisclosureItemsDomain_13293"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FairValueInputsLevel2Member" xlink:label="Locator_us-gaap_FairValueInputsLevel2Member_13294"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FairValueDefinedBenefitPlanMeasuredOnRecurringBasisDisclosureItemsDomain_13293" xlink:to="Locator_us-gaap_FairValueInputsLevel2Member_13294" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueDefinedBenefitPlanMeasuredOnRecurringBasisDisclosureItemsDomain" xlink:label="Locator_exc_FairValueDefinedBenefitPlanMeasuredOnRecurringBasisDisclosureItemsDomain_13295"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FairValueInputsLevel3Member" xlink:label="Locator_us-gaap_FairValueInputsLevel3Member_13296"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FairValueDefinedBenefitPlanMeasuredOnRecurringBasisDisclosureItemsDomain_13295" xlink:to="Locator_us-gaap_FairValueInputsLevel3Member_13296" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EquitySecuritiesAbstract" xlink:label="Locator_exc_EquitySecuritiesAbstract_13307"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_IndividuallyHeldEquitySecurities" xlink:label="Locator_exc_IndividuallyHeldEquitySecurities_13308"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_EquitySecuritiesAbstract_13307" xlink:to="Locator_exc_IndividuallyHeldEquitySecurities_13308" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EquitySecuritiesAbstract" xlink:label="Locator_exc_EquitySecuritiesAbstract_13309"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueAssetsMeasuredOnRecurringBasisCommingledFunds" xlink:label="Locator_exc_FairValueAssetsMeasuredOnRecurringBasisCommingledFunds_13310"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_EquitySecuritiesAbstract_13309" xlink:to="Locator_exc_FairValueAssetsMeasuredOnRecurringBasisCommingledFunds_13310" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EquitySecuritiesAbstract" xlink:label="Locator_exc_EquitySecuritiesAbstract_13311"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_MutualFundsEquitySecurity" xlink:label="Locator_exc_MutualFundsEquitySecurity_13312"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_EquitySecuritiesAbstract_13311" xlink:to="Locator_exc_MutualFundsEquitySecurity_13312" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EquitySecuritiesAbstract" xlink:label="Locator_exc_EquitySecuritiesAbstract_13313"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueAssetsMeasuredOnRecurringBasisEquitySecurities" xlink:label="Locator_exc_FairValueAssetsMeasuredOnRecurringBasisEquitySecurities_13314"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_EquitySecuritiesAbstract_13313" xlink:to="Locator_exc_FairValueAssetsMeasuredOnRecurringBasisEquitySecurities_13314" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueAssetsMeasuredOnRecurringBasisFixedIncomeAbstract" xlink:label="Locator_exc_FairValueAssetsMeasuredOnRecurringBasisFixedIncomeAbstract_13317"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue" xlink:label="Locator_us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue_13318"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FairValueAssetsMeasuredOnRecurringBasisFixedIncomeAbstract_13317" xlink:to="Locator_us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue_13318" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueAssetsMeasuredOnRecurringBasisFixedIncomeAbstract" xlink:label="Locator_exc_FairValueAssetsMeasuredOnRecurringBasisFixedIncomeAbstract_13319"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FinancialInstrumentsOwnedStateAndMunicipalGovernmentObligationsAtFairValue" xlink:label="Locator_us-gaap_FinancialInstrumentsOwnedStateAndMunicipalGovernmentObligationsAtFairValue_13320"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FairValueAssetsMeasuredOnRecurringBasisFixedIncomeAbstract_13319" xlink:to="Locator_us-gaap_FinancialInstrumentsOwnedStateAndMunicipalGovernmentObligationsAtFairValue_13320" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueAssetsMeasuredOnRecurringBasisFixedIncomeAbstract" xlink:label="Locator_exc_FairValueAssetsMeasuredOnRecurringBasisFixedIncomeAbstract_13321"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ForeignDebtSecurities" xlink:label="Locator_exc_ForeignDebtSecurities_13322"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FairValueAssetsMeasuredOnRecurringBasisFixedIncomeAbstract_13321" xlink:to="Locator_exc_ForeignDebtSecurities_13322" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueAssetsMeasuredOnRecurringBasisFixedIncomeAbstract" xlink:label="Locator_exc_FairValueAssetsMeasuredOnRecurringBasisFixedIncomeAbstract_13323"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FinancialInstrumentsOwnedCorporateDebtAtFairValue" xlink:label="Locator_us-gaap_FinancialInstrumentsOwnedCorporateDebtAtFairValue_13324"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FairValueAssetsMeasuredOnRecurringBasisFixedIncomeAbstract_13323" xlink:to="Locator_us-gaap_FinancialInstrumentsOwnedCorporateDebtAtFairValue_13324" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueAssetsMeasuredOnRecurringBasisFixedIncomeAbstract" xlink:label="Locator_exc_FairValueAssetsMeasuredOnRecurringBasisFixedIncomeAbstract_13325"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueAssetsMeasuredOnRecurringBasisFederalAgencyMortgageBackedSecurities" xlink:label="Locator_exc_FairValueAssetsMeasuredOnRecurringBasisFederalAgencyMortgageBackedSecurities_13326"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FairValueAssetsMeasuredOnRecurringBasisFixedIncomeAbstract_13325" xlink:to="Locator_exc_FairValueAssetsMeasuredOnRecurringBasisFederalAgencyMortgageBackedSecurities_13326" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueAssetsMeasuredOnRecurringBasisFixedIncomeAbstract" xlink:label="Locator_exc_FairValueAssetsMeasuredOnRecurringBasisFixedIncomeAbstract_13327"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueAssetsMeasuredOnRecurringBasisNonfederalAgencyMortgageBackedSecurities" xlink:label="Locator_exc_FairValueAssetsMeasuredOnRecurringBasisNonfederalAgencyMortgageBackedSecurities_13328"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FairValueAssetsMeasuredOnRecurringBasisFixedIncomeAbstract_13327" xlink:to="Locator_exc_FairValueAssetsMeasuredOnRecurringBasisNonfederalAgencyMortgageBackedSecurities_13328" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueAssetsMeasuredOnRecurringBasisFixedIncomeAbstract" xlink:label="Locator_exc_FairValueAssetsMeasuredOnRecurringBasisFixedIncomeAbstract_13329"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CommingledFundsFixedIncomeSecurities" xlink:label="Locator_exc_CommingledFundsFixedIncomeSecurities_13330"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FairValueAssetsMeasuredOnRecurringBasisFixedIncomeAbstract_13329" xlink:to="Locator_exc_CommingledFundsFixedIncomeSecurities_13330" order="7.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueAssetsMeasuredOnRecurringBasisFixedIncomeAbstract" xlink:label="Locator_exc_FairValueAssetsMeasuredOnRecurringBasisFixedIncomeAbstract_13331"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_MutualFundsFixedIncomeSecurities" xlink:label="Locator_exc_MutualFundsFixedIncomeSecurities_13332"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FairValueAssetsMeasuredOnRecurringBasisFixedIncomeAbstract_13331" xlink:to="Locator_exc_MutualFundsFixedIncomeSecurities_13332" order="8.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueAssetsMeasuredOnRecurringBasisFixedIncomeAbstract" xlink:label="Locator_exc_FairValueAssetsMeasuredOnRecurringBasisFixedIncomeAbstract_13333"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueAssetsMeasuredOnRecurringBasisFixedIncomeTotal" xlink:label="Locator_exc_FairValueAssetsMeasuredOnRecurringBasisFixedIncomeTotal_13334"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FairValueAssetsMeasuredOnRecurringBasisFixedIncomeAbstract_13333" xlink:to="Locator_exc_FairValueAssetsMeasuredOnRecurringBasisFixedIncomeTotal_13334" order="9.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis" xlink:label="Locator_us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis_13297"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlansDomain" xlink:label="Locator_us-gaap_DefinedBenefitPlansDomain_13298"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis_13297" xlink:to="Locator_us-gaap_DefinedBenefitPlansDomain_13298" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlansDomain" xlink:label="Locator_us-gaap_DefinedBenefitPlansDomain_13299"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PensionPlansDefinedBenefitMember" xlink:label="Locator_us-gaap_PensionPlansDefinedBenefitMember_13300"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DefinedBenefitPlansDomain_13299" xlink:to="Locator_us-gaap_PensionPlansDefinedBenefitMember_13300" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlansDomain" xlink:label="Locator_us-gaap_DefinedBenefitPlansDomain_13301"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember" xlink:label="Locator_us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_13302"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DefinedBenefitPlansDomain_13301" xlink:to="Locator_us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_13302" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueDefinedBenefitPlanMeasuredOnRecurringBasisFinancialStatementCaptionsLineItems" xlink:label="Locator_exc_FairValueDefinedBenefitPlanMeasuredOnRecurringBasisFinancialStatementCaptionsLineItems_13229"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueDefinedBenefitPlanMeasuredOnRecurringBasisTable" xlink:label="Locator_exc_FairValueDefinedBenefitPlanMeasuredOnRecurringBasisTable_13230"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="Locator_exc_FairValueDefinedBenefitPlanMeasuredOnRecurringBasisFinancialStatementCaptionsLineItems_13229" xlink:to="Locator_exc_FairValueDefinedBenefitPlanMeasuredOnRecurringBasisTable_13230" order="0.5" xbrldt:contextElement="segment" xbrldt:closed="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueDefinedBenefitPlanMeasuredOnRecurringBasisTable" xlink:label="Locator_exc_FairValueDefinedBenefitPlanMeasuredOnRecurringBasisTable_13285"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueDefinedBenefitPlanMeasuredOnRecurringBasisDisclosureItemsAxis" xlink:label="Locator_exc_FairValueDefinedBenefitPlanMeasuredOnRecurringBasisDisclosureItemsAxis_13286"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_exc_FairValueDefinedBenefitPlanMeasuredOnRecurringBasisTable_13285" xlink:to="Locator_exc_FairValueDefinedBenefitPlanMeasuredOnRecurringBasisDisclosureItemsAxis_13286" order="0.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueDefinedBenefitPlanMeasuredOnRecurringBasisTable" xlink:label="Locator_exc_FairValueDefinedBenefitPlanMeasuredOnRecurringBasisTable_13287"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis" xlink:label="Locator_us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis_13288"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_exc_FairValueDefinedBenefitPlanMeasuredOnRecurringBasisTable_13287" xlink:to="Locator_us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis_13288" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueDefinedBenefitPlanMeasuredOnRecurringBasisFinancialStatementCaptionsLineItems" xlink:label="Locator_exc_FairValueDefinedBenefitPlanMeasuredOnRecurringBasisFinancialStatementCaptionsLineItems_13303"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CashAndCashEquivalentsFairValueDisclosure" xlink:label="Locator_us-gaap_CashAndCashEquivalentsFairValueDisclosure_13304"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FairValueDefinedBenefitPlanMeasuredOnRecurringBasisFinancialStatementCaptionsLineItems_13303" xlink:to="Locator_us-gaap_CashAndCashEquivalentsFairValueDisclosure_13304" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueDefinedBenefitPlanMeasuredOnRecurringBasisFinancialStatementCaptionsLineItems" xlink:label="Locator_exc_FairValueDefinedBenefitPlanMeasuredOnRecurringBasisFinancialStatementCaptionsLineItems_13305"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EquitySecuritiesAbstract" xlink:label="Locator_exc_EquitySecuritiesAbstract_13306"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FairValueDefinedBenefitPlanMeasuredOnRecurringBasisFinancialStatementCaptionsLineItems_13305" xlink:to="Locator_exc_EquitySecuritiesAbstract_13306" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueDefinedBenefitPlanMeasuredOnRecurringBasisFinancialStatementCaptionsLineItems" xlink:label="Locator_exc_FairValueDefinedBenefitPlanMeasuredOnRecurringBasisFinancialStatementCaptionsLineItems_13315"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueAssetsMeasuredOnRecurringBasisFixedIncomeAbstract" xlink:label="Locator_exc_FairValueAssetsMeasuredOnRecurringBasisFixedIncomeAbstract_13316"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FairValueDefinedBenefitPlanMeasuredOnRecurringBasisFinancialStatementCaptionsLineItems_13315" xlink:to="Locator_exc_FairValueAssetsMeasuredOnRecurringBasisFixedIncomeAbstract_13316" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueDefinedBenefitPlanMeasuredOnRecurringBasisFinancialStatementCaptionsLineItems" xlink:label="Locator_exc_FairValueDefinedBenefitPlanMeasuredOnRecurringBasisFinancialStatementCaptionsLineItems_13335"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueAssetsMeasuredOnRecurringBasisHedgeFunds" xlink:label="Locator_exc_FairValueAssetsMeasuredOnRecurringBasisHedgeFunds_13336"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FairValueDefinedBenefitPlanMeasuredOnRecurringBasisFinancialStatementCaptionsLineItems_13335" xlink:to="Locator_exc_FairValueAssetsMeasuredOnRecurringBasisHedgeFunds_13336" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueDefinedBenefitPlanMeasuredOnRecurringBasisFinancialStatementCaptionsLineItems" xlink:label="Locator_exc_FairValueDefinedBenefitPlanMeasuredOnRecurringBasisFinancialStatementCaptionsLineItems_13337"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueAssetsMeasuredOnRecurringBasisPrivateEquity" xlink:label="Locator_exc_FairValueAssetsMeasuredOnRecurringBasisPrivateEquity_13338"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FairValueDefinedBenefitPlanMeasuredOnRecurringBasisFinancialStatementCaptionsLineItems_13337" xlink:to="Locator_exc_FairValueAssetsMeasuredOnRecurringBasisPrivateEquity_13338" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueDefinedBenefitPlanMeasuredOnRecurringBasisFinancialStatementCaptionsLineItems" xlink:label="Locator_exc_FairValueDefinedBenefitPlanMeasuredOnRecurringBasisFinancialStatementCaptionsLineItems_13339"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueAssetsMeasuredOnRecurringBasisRealEstate" xlink:label="Locator_exc_FairValueAssetsMeasuredOnRecurringBasisRealEstate_13340"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FairValueDefinedBenefitPlanMeasuredOnRecurringBasisFinancialStatementCaptionsLineItems_13339" xlink:to="Locator_exc_FairValueAssetsMeasuredOnRecurringBasisRealEstate_13340" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueDefinedBenefitPlanMeasuredOnRecurringBasisFinancialStatementCaptionsLineItems" xlink:label="Locator_exc_FairValueDefinedBenefitPlanMeasuredOnRecurringBasisFinancialStatementCaptionsLineItems_13341"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueAssetsMeasuredOnRecurringBasisPensionPlanAssetsTotal" xlink:label="Locator_exc_FairValueAssetsMeasuredOnRecurringBasisPensionPlanAssetsTotal_13342"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FairValueDefinedBenefitPlanMeasuredOnRecurringBasisFinancialStatementCaptionsLineItems_13341" xlink:to="Locator_exc_FairValueAssetsMeasuredOnRecurringBasisPensionPlanAssetsTotal_13342" order="7.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueDefinedBenefitPlanMeasuredOnRecurringBasisFinancialStatementCaptionsLineItems" xlink:label="Locator_exc_FairValueDefinedBenefitPlanMeasuredOnRecurringBasisFinancialStatementCaptionsLineItems_13343"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueAssetsMeasuredOnRecurringBasisPostretirementBenefitPlanTotal" xlink:label="Locator_exc_FairValueAssetsMeasuredOnRecurringBasisPostretirementBenefitPlanTotal_13344"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FairValueDefinedBenefitPlanMeasuredOnRecurringBasisFinancialStatementCaptionsLineItems_13343" xlink:to="Locator_exc_FairValueAssetsMeasuredOnRecurringBasisPostretirementBenefitPlanTotal_13344" order="8.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueDefinedBenefitPlanMeasuredOnRecurringBasisFinancialStatementCaptionsLineItems" xlink:label="Locator_exc_FairValueDefinedBenefitPlanMeasuredOnRecurringBasisFinancialStatementCaptionsLineItems_13345"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueAssetsMeasuredOnRecurringBasisPensionPlanAndPostretirementBenefitPlanTotal" xlink:label="Locator_exc_FairValueAssetsMeasuredOnRecurringBasisPensionPlanAndPostretirementBenefitPlanTotal_13346"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FairValueDefinedBenefitPlanMeasuredOnRecurringBasisFinancialStatementCaptionsLineItems_13345" xlink:to="Locator_exc_FairValueAssetsMeasuredOnRecurringBasisPensionPlanAndPostretirementBenefitPlanTotal_13346" order="9.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueDefinedBenefitPlanMeasuredOnRecurringBasisFinancialStatementCaptionsLineItems" xlink:label="Locator_exc_FairValueDefinedBenefitPlanMeasuredOnRecurringBasisFinancialStatementCaptionsLineItems_13347"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueDefinedBenefitPlanMeasuredOnRecurringBasisFinancialStatementFootnotesAbstract" xlink:label="Locator_exc_FairValueDefinedBenefitPlanMeasuredOnRecurringBasisFinancialStatementFootnotesAbstract_13348"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FairValueDefinedBenefitPlanMeasuredOnRecurringBasisFinancialStatementCaptionsLineItems_13347" xlink:to="Locator_exc_FairValueDefinedBenefitPlanMeasuredOnRecurringBasisFinancialStatementFootnotesAbstract_13348" order="10.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueDefinedBenefitPlanMeasuredOnRecurringBasisFinancialStatementFootnotesAbstract" xlink:label="Locator_exc_FairValueDefinedBenefitPlanMeasuredOnRecurringBasisFinancialStatementFootnotesAbstract_13349"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_InterestAndDividendReceivablesExcludedFromPensionAndOpeb" xlink:label="Locator_exc_InterestAndDividendReceivablesExcludedFromPensionAndOpeb_13350"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FairValueDefinedBenefitPlanMeasuredOnRecurringBasisFinancialStatementFootnotesAbstract_13349" xlink:to="Locator_exc_InterestAndDividendReceivablesExcludedFromPensionAndOpeb_13350" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueDefinedBenefitPlanMeasuredOnRecurringBasisFinancialStatementFootnotesAbstract" xlink:label="Locator_exc_FairValueDefinedBenefitPlanMeasuredOnRecurringBasisFinancialStatementFootnotesAbstract_13351"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PendingAssetSalesTransactionsExcludedFromPensionAndOpeb" xlink:label="Locator_exc_PendingAssetSalesTransactionsExcludedFromPensionAndOpeb_13352"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FairValueDefinedBenefitPlanMeasuredOnRecurringBasisFinancialStatementFootnotesAbstract_13351" xlink:to="Locator_exc_PendingAssetSalesTransactionsExcludedFromPensionAndOpeb_13352" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueDefinedBenefitPlanMeasuredOnRecurringBasisFinancialStatementFootnotesAbstract" xlink:label="Locator_exc_FairValueDefinedBenefitPlanMeasuredOnRecurringBasisFinancialStatementFootnotesAbstract_13353"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_SecuritiesReceivedAsCollateral" xlink:label="Locator_us-gaap_SecuritiesReceivedAsCollateral_13354"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FairValueDefinedBenefitPlanMeasuredOnRecurringBasisFinancialStatementFootnotesAbstract_13353" xlink:to="Locator_us-gaap_SecuritiesReceivedAsCollateral_13354" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueDefinedBenefitPlanMeasuredOnRecurringBasisFinancialStatementFootnotesAbstract" xlink:label="Locator_exc_FairValueDefinedBenefitPlanMeasuredOnRecurringBasisFinancialStatementFootnotesAbstract_13355"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ObligationToReturnSecuritiesReceivedAsCollateral" xlink:label="Locator_us-gaap_ObligationToReturnSecuritiesReceivedAsCollateral_13356"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_FairValueDefinedBenefitPlanMeasuredOnRecurringBasisFinancialStatementFootnotesAbstract_13355" xlink:to="Locator_us-gaap_ObligationToReturnSecuritiesReceivedAsCollateral_13356" order="4.0" xbrldt:usable="true"/> |
| | </definitionLink> |
| <definitionLink xlink:type="extended" xlink:role="http://exeloncorp.com/role/DisclosureRetirementBenefitsFairValueUnobservableDetails"> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis" xlink:label="Locator_us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis_13405"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlansDomain" xlink:label="Locator_us-gaap_DefinedBenefitPlansDomain_13406"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis_13405" xlink:to="Locator_us-gaap_DefinedBenefitPlansDomain_13406" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlansDomain" xlink:label="Locator_us-gaap_DefinedBenefitPlansDomain_13407"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PensionPlansDefinedBenefitMember" xlink:label="Locator_us-gaap_PensionPlansDefinedBenefitMember_13408"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DefinedBenefitPlansDomain_13407" xlink:to="Locator_us-gaap_PensionPlansDefinedBenefitMember_13408" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlansDomain" xlink:label="Locator_us-gaap_DefinedBenefitPlansDomain_13409"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember" xlink:label="Locator_us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_13410"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DefinedBenefitPlansDomain_13409" xlink:to="Locator_us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_13410" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanFairValueOfPlanAssetsUnobservableInputReconciliationLineItems" xlink:label="Locator_exc_DefinedBenefitPlanFairValueOfPlanAssetsUnobservableInputReconciliationLineItems_13399"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanFairValueOfPlanAssetsUnobservableInputReconciliationTable" xlink:label="Locator_exc_DefinedBenefitPlanFairValueOfPlanAssetsUnobservableInputReconciliationTable_13400"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="Locator_exc_DefinedBenefitPlanFairValueOfPlanAssetsUnobservableInputReconciliationLineItems_13399" xlink:to="Locator_exc_DefinedBenefitPlanFairValueOfPlanAssetsUnobservableInputReconciliationTable_13400" order="0.5" xbrldt:contextElement="segment" xbrldt:closed="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanFairValueOfPlanAssetsUnobservableInputReconciliationTable" xlink:label="Locator_exc_DefinedBenefitPlanFairValueOfPlanAssetsUnobservableInputReconciliationTable_13401"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanFairValueOfPlanAssetsUnobservableInputReconciliationAxis" xlink:label="Locator_exc_DefinedBenefitPlanFairValueOfPlanAssetsUnobservableInputReconciliationAxis_13402"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_exc_DefinedBenefitPlanFairValueOfPlanAssetsUnobservableInputReconciliationTable_13401" xlink:to="Locator_exc_DefinedBenefitPlanFairValueOfPlanAssetsUnobservableInputReconciliationAxis_13402" order="0.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanFairValueOfPlanAssetsUnobservableInputReconciliationAxis" xlink:label="Locator_exc_DefinedBenefitPlanFairValueOfPlanAssetsUnobservableInputReconciliationAxis_13377"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_UnobservableInputReconciliationDomain" xlink:label="Locator_exc_UnobservableInputReconciliationDomain_13378"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="Locator_exc_DefinedBenefitPlanFairValueOfPlanAssetsUnobservableInputReconciliationAxis_13377" xlink:to="Locator_exc_UnobservableInputReconciliationDomain_13378" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanFairValueOfPlanAssetsUnobservableInputReconciliationAxis" xlink:label="Locator_exc_DefinedBenefitPlanFairValueOfPlanAssetsUnobservableInputReconciliationAxis_13411"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_UnobservableInputReconciliationDomain" xlink:label="Locator_exc_UnobservableInputReconciliationDomain_13412"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_exc_DefinedBenefitPlanFairValueOfPlanAssetsUnobservableInputReconciliationAxis_13411" xlink:to="Locator_exc_UnobservableInputReconciliationDomain_13412" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_UnobservableInputReconciliationDomain" xlink:label="Locator_exc_UnobservableInputReconciliationDomain_13413"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_HedgeFundInvestmentsMember" xlink:label="Locator_exc_HedgeFundInvestmentsMember_13414"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_UnobservableInputReconciliationDomain_13413" xlink:to="Locator_exc_HedgeFundInvestmentsMember_13414" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_UnobservableInputReconciliationDomain" xlink:label="Locator_exc_UnobservableInputReconciliationDomain_13415"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CommingledFundsInPrivateEquityInvestmentsMember" xlink:label="Locator_exc_CommingledFundsInPrivateEquityInvestmentsMember_13416"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_UnobservableInputReconciliationDomain_13415" xlink:to="Locator_exc_CommingledFundsInPrivateEquityInvestmentsMember_13416" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_UnobservableInputReconciliationDomain" xlink:label="Locator_exc_UnobservableInputReconciliationDomain_13417"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CommingledFundsInEquityAndFixedIncomeSecuritiesMember" xlink:label="Locator_exc_CommingledFundsInEquityAndFixedIncomeSecuritiesMember_13418"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_UnobservableInputReconciliationDomain_13417" xlink:to="Locator_exc_CommingledFundsInEquityAndFixedIncomeSecuritiesMember_13418" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_UnobservableInputReconciliationDomain" xlink:label="Locator_exc_UnobservableInputReconciliationDomain_13419"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CommingledFundsInDirectRealEstateMember" xlink:label="Locator_exc_CommingledFundsInDirectRealEstateMember_13420"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_UnobservableInputReconciliationDomain_13419" xlink:to="Locator_exc_CommingledFundsInDirectRealEstateMember_13420" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanFairValueOfPlanAssetsUnobservableInputReconciliationTable" xlink:label="Locator_exc_DefinedBenefitPlanFairValueOfPlanAssetsUnobservableInputReconciliationTable_13403"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis" xlink:label="Locator_us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis_13404"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_exc_DefinedBenefitPlanFairValueOfPlanAssetsUnobservableInputReconciliationTable_13403" xlink:to="Locator_us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis_13404" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanFairValueOfPlanAssetsUnobservableInputReconciliationLineItems" xlink:label="Locator_exc_DefinedBenefitPlanFairValueOfPlanAssetsUnobservableInputReconciliationLineItems_13421"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanActualReturnOnPlanAssetsAbstract" xlink:label="Locator_us-gaap_DefinedBenefitPlanActualReturnOnPlanAssetsAbstract_13422"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_DefinedBenefitPlanFairValueOfPlanAssetsUnobservableInputReconciliationLineItems_13421" xlink:to="Locator_us-gaap_DefinedBenefitPlanActualReturnOnPlanAssetsAbstract_13422" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanActualReturnOnPlanAssetsAbstract" xlink:label="Locator_us-gaap_DefinedBenefitPlanActualReturnOnPlanAssetsAbstract_13423"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanActualReturnOnPlanAssetsStillHeld" xlink:label="Locator_us-gaap_DefinedBenefitPlanActualReturnOnPlanAssetsStillHeld_13424"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DefinedBenefitPlanActualReturnOnPlanAssetsAbstract_13423" xlink:to="Locator_us-gaap_DefinedBenefitPlanActualReturnOnPlanAssetsStillHeld_13424" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanActualReturnOnPlanAssetsAbstract" xlink:label="Locator_us-gaap_DefinedBenefitPlanActualReturnOnPlanAssetsAbstract_13425"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanActualReturnOnPlanAssetsSoldDuringPeriod" xlink:label="Locator_us-gaap_DefinedBenefitPlanActualReturnOnPlanAssetsSoldDuringPeriod_13426"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DefinedBenefitPlanActualReturnOnPlanAssetsAbstract_13425" xlink:to="Locator_us-gaap_DefinedBenefitPlanActualReturnOnPlanAssetsSoldDuringPeriod_13426" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanFairValueOfPlanAssetsUnobservableInputReconciliationLineItems" xlink:label="Locator_exc_DefinedBenefitPlanFairValueOfPlanAssetsUnobservableInputReconciliationLineItems_13427"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanPurchasesSalesAndSettlements" xlink:label="Locator_us-gaap_DefinedBenefitPlanPurchasesSalesAndSettlements_13428"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_DefinedBenefitPlanFairValueOfPlanAssetsUnobservableInputReconciliationLineItems_13427" xlink:to="Locator_us-gaap_DefinedBenefitPlanPurchasesSalesAndSettlements_13428" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanPurchasesSalesAndSettlements" xlink:label="Locator_us-gaap_DefinedBenefitPlanPurchasesSalesAndSettlements_13429"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanPurchases" xlink:label="Locator_exc_DefinedBenefitPlanPurchases_13430"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DefinedBenefitPlanPurchasesSalesAndSettlements_13429" xlink:to="Locator_exc_DefinedBenefitPlanPurchases_13430" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanPurchasesSalesAndSettlements" xlink:label="Locator_us-gaap_DefinedBenefitPlanPurchasesSalesAndSettlements_13431"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanSales" xlink:label="Locator_exc_DefinedBenefitPlanSales_13432"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DefinedBenefitPlanPurchasesSalesAndSettlements_13431" xlink:to="Locator_exc_DefinedBenefitPlanSales_13432" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanPurchasesSalesAndSettlements" xlink:label="Locator_us-gaap_DefinedBenefitPlanPurchasesSalesAndSettlements_13433"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanSettlements" xlink:label="Locator_exc_DefinedBenefitPlanSettlements_13434"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DefinedBenefitPlanPurchasesSalesAndSettlements_13433" xlink:to="Locator_exc_DefinedBenefitPlanSettlements_13434" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanFairValueOfPlanAssetsUnobservableInputReconciliationLineItems" xlink:label="Locator_exc_DefinedBenefitPlanFairValueOfPlanAssetsUnobservableInputReconciliationLineItems_13435"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanTransfersBetweenMeasurementLevels" xlink:label="Locator_us-gaap_DefinedBenefitPlanTransfersBetweenMeasurementLevels_13436"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_DefinedBenefitPlanFairValueOfPlanAssetsUnobservableInputReconciliationLineItems_13435" xlink:to="Locator_us-gaap_DefinedBenefitPlanTransfersBetweenMeasurementLevels_13436" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanFairValueOfPlanAssetsUnobservableInputReconciliationLineItems" xlink:label="Locator_exc_DefinedBenefitPlanFairValueOfPlanAssetsUnobservableInputReconciliationLineItems_13437"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanFairValueOfPlanAssetsUnobservableInputsReconciliation" xlink:label="Locator_exc_DefinedBenefitPlanFairValueOfPlanAssetsUnobservableInputsReconciliation_13438"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_DefinedBenefitPlanFairValueOfPlanAssetsUnobservableInputReconciliationLineItems_13437" xlink:to="Locator_exc_DefinedBenefitPlanFairValueOfPlanAssetsUnobservableInputsReconciliation_13438" order="5.0" xbrldt:usable="true"/> |
| | </definitionLink> |
| <definitionLink xlink:type="extended" xlink:role="http://exeloncorp.com/role/RetirementBenefitsAdditionalDetails"> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_13511"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_13512"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_dei_LegalEntityAxis_13511" xlink:to="Locator_dei_EntityDomain_13512" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_13513"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BusinessServicesCompanyMember" xlink:label="Locator_exc_BusinessServicesCompanyMember_13514"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_13513" xlink:to="Locator_exc_BusinessServicesCompanyMember_13514" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_13515"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ExelonGenerationCoLLCMember" xlink:label="Locator_exc_ExelonGenerationCoLLCMember_13516"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_13515" xlink:to="Locator_exc_ExelonGenerationCoLLCMember_13516" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_13517"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CommonwealthEdisonCoMember" xlink:label="Locator_exc_CommonwealthEdisonCoMember_13518"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_13517" xlink:to="Locator_exc_CommonwealthEdisonCoMember_13518" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_13519"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PecoEnergyCoMember" xlink:label="Locator_exc_PecoEnergyCoMember_13520"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_13519" xlink:to="Locator_exc_PecoEnergyCoMember_13520" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_13521"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BaltimoreGasAndElectricCompanyMember" xlink:label="Locator_exc_BaltimoreGasAndElectricCompanyMember_13522"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_13521" xlink:to="Locator_exc_BaltimoreGasAndElectricCompanyMember_13522" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RetirementBenefitsAdditionalNarrativeInformationLineItems" xlink:label="Locator_exc_RetirementBenefitsAdditionalNarrativeInformationLineItems_13473"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RetirementBenefitsAdditionalNarrativeInformationTable" xlink:label="Locator_exc_RetirementBenefitsAdditionalNarrativeInformationTable_13474"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="Locator_exc_RetirementBenefitsAdditionalNarrativeInformationLineItems_13473" xlink:to="Locator_exc_RetirementBenefitsAdditionalNarrativeInformationTable_13474" order="0.5" xbrldt:contextElement="segment" xbrldt:closed="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RetirementBenefitsAdditionalNarrativeInformationTable" xlink:label="Locator_exc_RetirementBenefitsAdditionalNarrativeInformationTable_13507"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_13508"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_exc_RetirementBenefitsAdditionalNarrativeInformationTable_13507" xlink:to="Locator_dei_LegalEntityAxis_13508" order="0.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RetirementBenefitsAdditionalNarrativeInformationTable" xlink:label="Locator_exc_RetirementBenefitsAdditionalNarrativeInformationTable_13509"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanPensionPlansWithBenefitObligationsInExcessOfPlanAssetsAxis" xlink:label="Locator_exc_DefinedBenefitPlanPensionPlansWithBenefitObligationsInExcessOfPlanAssetsAxis_13510"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_exc_RetirementBenefitsAdditionalNarrativeInformationTable_13509" xlink:to="Locator_exc_DefinedBenefitPlanPensionPlansWithBenefitObligationsInExcessOfPlanAssetsAxis_13510" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanPensionPlansWithBenefitObligationsInExcessOfPlanAssetsAxis" xlink:label="Locator_exc_DefinedBenefitPlanPensionPlansWithBenefitObligationsInExcessOfPlanAssetsAxis_13461"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BenefitObligationInExcessOfPlanAssetsDomain" xlink:label="Locator_exc_BenefitObligationInExcessOfPlanAssetsDomain_13462"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="Locator_exc_DefinedBenefitPlanPensionPlansWithBenefitObligationsInExcessOfPlanAssetsAxis_13461" xlink:to="Locator_exc_BenefitObligationInExcessOfPlanAssetsDomain_13462" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanPensionPlansWithBenefitObligationsInExcessOfPlanAssetsAxis" xlink:label="Locator_exc_DefinedBenefitPlanPensionPlansWithBenefitObligationsInExcessOfPlanAssetsAxis_13523"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BenefitObligationInExcessOfPlanAssetsDomain" xlink:label="Locator_exc_BenefitObligationInExcessOfPlanAssetsDomain_13524"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_exc_DefinedBenefitPlanPensionPlansWithBenefitObligationsInExcessOfPlanAssetsAxis_13523" xlink:to="Locator_exc_BenefitObligationInExcessOfPlanAssetsDomain_13524" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BenefitObligationInExcessOfPlanAssetsDomain" xlink:label="Locator_exc_BenefitObligationInExcessOfPlanAssetsDomain_13525"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ProjectedBenefitObligationInExcessOfPlanAssetsMember" xlink:label="Locator_exc_ProjectedBenefitObligationInExcessOfPlanAssetsMember_13526"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_BenefitObligationInExcessOfPlanAssetsDomain_13525" xlink:to="Locator_exc_ProjectedBenefitObligationInExcessOfPlanAssetsMember_13526" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BenefitObligationInExcessOfPlanAssetsDomain" xlink:label="Locator_exc_BenefitObligationInExcessOfPlanAssetsDomain_13527"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AccumulatedBenefitObligationInExcessOfPlanAssetsMember" xlink:label="Locator_exc_AccumulatedBenefitObligationInExcessOfPlanAssetsMember_13528"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_BenefitObligationInExcessOfPlanAssetsDomain_13527" xlink:to="Locator_exc_AccumulatedBenefitObligationInExcessOfPlanAssetsMember_13528" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RetirementBenefitsAdditionalNarrativeInformationLineItems" xlink:label="Locator_exc_RetirementBenefitsAdditionalNarrativeInformationLineItems_13529"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BenefitObligationAndPlanAssetsAndFundedStatusAbstract" xlink:label="Locator_exc_BenefitObligationAndPlanAssetsAndFundedStatusAbstract_13530"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_RetirementBenefitsAdditionalNarrativeInformationLineItems_13529" xlink:to="Locator_exc_BenefitObligationAndPlanAssetsAndFundedStatusAbstract_13530" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BenefitObligationAndPlanAssetsAndFundedStatusAbstract" xlink:label="Locator_exc_BenefitObligationAndPlanAssetsAndFundedStatusAbstract_13531"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanBenefitObligationPeriodIncreaseDecrease" xlink:label="Locator_us-gaap_DefinedBenefitPlanBenefitObligationPeriodIncreaseDecrease_13532"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_BenefitObligationAndPlanAssetsAndFundedStatusAbstract_13531" xlink:to="Locator_us-gaap_DefinedBenefitPlanBenefitObligationPeriodIncreaseDecrease_13532" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BenefitObligationAndPlanAssetsAndFundedStatusAbstract" xlink:label="Locator_exc_BenefitObligationAndPlanAssetsAndFundedStatusAbstract_13533"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanFundedStatusOfPlanPercentage" xlink:label="Locator_exc_DefinedBenefitPlanFundedStatusOfPlanPercentage_13534"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_BenefitObligationAndPlanAssetsAndFundedStatusAbstract_13533" xlink:to="Locator_exc_DefinedBenefitPlanFundedStatusOfPlanPercentage_13534" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RetirementBenefitsAdditionalNarrativeInformationLineItems" xlink:label="Locator_exc_RetirementBenefitsAdditionalNarrativeInformationLineItems_13535"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_HealthcareReformLegislationImpactAbstract" xlink:label="Locator_exc_HealthcareReformLegislationImpactAbstract_13536"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_RetirementBenefitsAdditionalNarrativeInformationLineItems_13535" xlink:to="Locator_exc_HealthcareReformLegislationImpactAbstract_13536" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_HealthcareReformLegislationImpactAbstract" xlink:label="Locator_exc_HealthcareReformLegislationImpactAbstract_13537"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DeferredFederalIncomeTaxExpenseFederallySubsidizedHealthcareCosts" xlink:label="Locator_exc_DeferredFederalIncomeTaxExpenseFederallySubsidizedHealthcareCosts_13538"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_HealthcareReformLegislationImpactAbstract_13537" xlink:to="Locator_exc_DeferredFederalIncomeTaxExpenseFederallySubsidizedHealthcareCosts_13538" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_HealthcareReformLegislationImpactAbstract" xlink:label="Locator_exc_HealthcareReformLegislationImpactAbstract_13539"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ExciseTaxOnHighCostBenefitPlans" xlink:label="Locator_exc_ExciseTaxOnHighCostBenefitPlans_13540"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_HealthcareReformLegislationImpactAbstract_13539" xlink:to="Locator_exc_ExciseTaxOnHighCostBenefitPlans_13540" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_HealthcareReformLegislationImpactAbstract" xlink:label="Locator_exc_HealthcareReformLegislationImpactAbstract_13541"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ExciseTaxOnHighCostBenefitPlansImpactOnPostretirementBenefitObligation" xlink:label="Locator_exc_ExciseTaxOnHighCostBenefitPlansImpactOnPostretirementBenefitObligation_13542"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_HealthcareReformLegislationImpactAbstract_13541" xlink:to="Locator_exc_ExciseTaxOnHighCostBenefitPlansImpactOnPostretirementBenefitObligation_13542" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RetirementBenefitsAdditionalNarrativeInformationLineItems" xlink:label="Locator_exc_RetirementBenefitsAdditionalNarrativeInformationLineItems_13543"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ComponentsOfNetPeriodicBenefitCostsAbstract" xlink:label="Locator_exc_ComponentsOfNetPeriodicBenefitCostsAbstract_13544"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_RetirementBenefitsAdditionalNarrativeInformationLineItems_13543" xlink:to="Locator_exc_ComponentsOfNetPeriodicBenefitCostsAbstract_13544" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ComponentsOfNetPeriodicBenefitCostsAbstract" xlink:label="Locator_exc_ComponentsOfNetPeriodicBenefitCostsAbstract_13545"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PrescriptionDrugBenefitEffectOfSubsidyOnNetPeriodicPostretirementBenefitCost" xlink:label="Locator_us-gaap_PrescriptionDrugBenefitEffectOfSubsidyOnNetPeriodicPostretirementBenefitCost_13546"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_ComponentsOfNetPeriodicBenefitCostsAbstract_13545" xlink:to="Locator_us-gaap_PrescriptionDrugBenefitEffectOfSubsidyOnNetPeriodicPostretirementBenefitCost_13546" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RetirementBenefitsAdditionalNarrativeInformationLineItems" xlink:label="Locator_exc_RetirementBenefitsAdditionalNarrativeInformationLineItems_13547"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanContributionsAbstract" xlink:label="Locator_exc_DefinedBenefitPlanContributionsAbstract_13548"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_RetirementBenefitsAdditionalNarrativeInformationLineItems_13547" xlink:to="Locator_exc_DefinedBenefitPlanContributionsAbstract_13548" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanContributionsAbstract" xlink:label="Locator_exc_DefinedBenefitPlanContributionsAbstract_13549"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_QualifiedDefinedBenefitPlanEstimatedFutureEmployerContributionsInNextFiscalYear" xlink:label="Locator_exc_QualifiedDefinedBenefitPlanEstimatedFutureEmployerContributionsInNextFiscalYear_13550"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_DefinedBenefitPlanContributionsAbstract_13549" xlink:to="Locator_exc_QualifiedDefinedBenefitPlanEstimatedFutureEmployerContributionsInNextFiscalYear_13550" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanContributionsAbstract" xlink:label="Locator_exc_DefinedBenefitPlanContributionsAbstract_13551"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NonQualifiedDefinedBenefitPlanEstimatedFutureEmployerContributionsInNextFiscalYear" xlink:label="Locator_exc_NonQualifiedDefinedBenefitPlanEstimatedFutureEmployerContributionsInNextFiscalYear_13552"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_DefinedBenefitPlanContributionsAbstract_13551" xlink:to="Locator_exc_NonQualifiedDefinedBenefitPlanEstimatedFutureEmployerContributionsInNextFiscalYear_13552" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanContributionsAbstract" xlink:label="Locator_exc_DefinedBenefitPlanContributionsAbstract_13553"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedOtherPostretirementBenefitPlanEstimatedFutureEmployerContributionsInNextFiscalYear" xlink:label="Locator_exc_DefinedOtherPostretirementBenefitPlanEstimatedFutureEmployerContributionsInNextFiscalYear_13554"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_DefinedBenefitPlanContributionsAbstract_13553" xlink:to="Locator_exc_DefinedOtherPostretirementBenefitPlanEstimatedFutureEmployerContributionsInNextFiscalYear_13554" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedBenefitPlanContributionsAbstract" xlink:label="Locator_exc_DefinedBenefitPlanContributionsAbstract_13555"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DefinedOtherPostretirementBenefitPlanEstimatedFutureEmployerContributionsInNextFiscalYearForAcquiredEntities" xlink:label="Locator_exc_DefinedOtherPostretirementBenefitPlanEstimatedFutureEmployerContributionsInNextFiscalYearForAcquiredEntities_13556"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_DefinedBenefitPlanContributionsAbstract_13555" xlink:to="Locator_exc_DefinedOtherPostretirementBenefitPlanEstimatedFutureEmployerContributionsInNextFiscalYearForAcquiredEntities_13556" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_RetirementBenefitsAdditionalNarrativeInformationLineItems" xlink:label="Locator_exc_RetirementBenefitsAdditionalNarrativeInformationLineItems_13557"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SecuritiesLendingProgramAbstract" xlink:label="Locator_exc_SecuritiesLendingProgramAbstract_13558"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_RetirementBenefitsAdditionalNarrativeInformationLineItems_13557" xlink:to="Locator_exc_SecuritiesLendingProgramAbstract_13558" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SecuritiesLendingProgramAbstract" xlink:label="Locator_exc_SecuritiesLendingProgramAbstract_13559"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PercentageOfCollateralForBorrowedSecuritiesInDomesticCurrency" xlink:label="Locator_exc_PercentageOfCollateralForBorrowedSecuritiesInDomesticCurrency_13560"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_SecuritiesLendingProgramAbstract_13559" xlink:to="Locator_exc_PercentageOfCollateralForBorrowedSecuritiesInDomesticCurrency_13560" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SecuritiesLendingProgramAbstract" xlink:label="Locator_exc_SecuritiesLendingProgramAbstract_13561"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PercentageOfCollateralForBorrowedSecuritiesInForeignCurrency" xlink:label="Locator_exc_PercentageOfCollateralForBorrowedSecuritiesInForeignCurrency_13562"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_SecuritiesLendingProgramAbstract_13561" xlink:to="Locator_exc_PercentageOfCollateralForBorrowedSecuritiesInForeignCurrency_13562" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SecuritiesLendingProgramAbstract" xlink:label="Locator_exc_SecuritiesLendingProgramAbstract_13563"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PercentageOfCollateralForBorrowedSecuritiesRequiredLevels" xlink:label="Locator_exc_PercentageOfCollateralForBorrowedSecuritiesRequiredLevels_13564"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_SecuritiesLendingProgramAbstract_13563" xlink:to="Locator_exc_PercentageOfCollateralForBorrowedSecuritiesRequiredLevels_13564" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SecuritiesLendingProgramAbstract" xlink:label="Locator_exc_SecuritiesLendingProgramAbstract_13565"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CollateralWeightedAverageMaturity" xlink:label="Locator_exc_CollateralWeightedAverageMaturity_13566"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_SecuritiesLendingProgramAbstract_13565" xlink:to="Locator_exc_CollateralWeightedAverageMaturity_13566" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SecuritiesLendingProgramAbstract" xlink:label="Locator_exc_SecuritiesLendingProgramAbstract_13567"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_SecuritiesLoaned" xlink:label="Locator_us-gaap_SecuritiesLoaned_13568"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_SecuritiesLendingProgramAbstract_13567" xlink:to="Locator_us-gaap_SecuritiesLoaned_13568" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SecuritiesLendingProgramAbstract" xlink:label="Locator_exc_SecuritiesLendingProgramAbstract_13569"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CollateralForBorrowedSecuritiesFairValue" xlink:label="Locator_exc_CollateralForBorrowedSecuritiesFairValue_13570"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_SecuritiesLendingProgramAbstract_13569" xlink:to="Locator_exc_CollateralForBorrowedSecuritiesFairValue_13570" order="6.0" xbrldt:usable="true"/> |
| | </definitionLink> |
| <definitionLink xlink:type="extended" xlink:role="http://exeloncorp.com/role/DisclosureDerivativeFinancialInstrumentsCommodityPriceRiskDetails"> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_13621"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_13622"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_dei_LegalEntityAxis_13621" xlink:to="Locator_dei_EntityDomain_13622" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_13623"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ExelonGenerationCoLLCMember" xlink:label="Locator_exc_ExelonGenerationCoLLCMember_13624"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_13623" xlink:to="Locator_exc_ExelonGenerationCoLLCMember_13624" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_13625"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CommonwealthEdisonCoMember" xlink:label="Locator_exc_CommonwealthEdisonCoMember_13626"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_13625" xlink:to="Locator_exc_CommonwealthEdisonCoMember_13626" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_13627"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PecoEnergyCoMember" xlink:label="Locator_exc_PecoEnergyCoMember_13628"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_13627" xlink:to="Locator_exc_PecoEnergyCoMember_13628" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_13629"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BaltimoreGasAndElectricCompanyMember" xlink:label="Locator_exc_BaltimoreGasAndElectricCompanyMember_13630"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_13629" xlink:to="Locator_exc_BaltimoreGasAndElectricCompanyMember_13630" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_13631"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OtherSegmentMember" xlink:label="Locator_exc_OtherSegmentMember_13632"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_13631" xlink:to="Locator_exc_OtherSegmentMember_13632" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FiveYearDisclosureDomain" xlink:label="Locator_us-gaap_FiveYearDisclosureDomain_13635"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OneYearFromBalanceSheetDateMember" xlink:label="Locator_us-gaap_OneYearFromBalanceSheetDateMember_13636"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_FiveYearDisclosureDomain_13635" xlink:to="Locator_us-gaap_OneYearFromBalanceSheetDateMember_13636" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FiveYearDisclosureDomain" xlink:label="Locator_us-gaap_FiveYearDisclosureDomain_13637"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_MoreThanOneAndWithinTwoYearsFromBalanceSheetDateMember" xlink:label="Locator_us-gaap_MoreThanOneAndWithinTwoYearsFromBalanceSheetDateMember_13638"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_FiveYearDisclosureDomain_13637" xlink:to="Locator_us-gaap_MoreThanOneAndWithinTwoYearsFromBalanceSheetDateMember_13638" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FiveYearDisclosureDomain" xlink:label="Locator_us-gaap_FiveYearDisclosureDomain_13639"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_MoreThanTwoAndWithinThreeYearsFromBalanceSheetDateMember" xlink:label="Locator_us-gaap_MoreThanTwoAndWithinThreeYearsFromBalanceSheetDateMember_13640"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_FiveYearDisclosureDomain_13639" xlink:to="Locator_us-gaap_MoreThanTwoAndWithinThreeYearsFromBalanceSheetDateMember_13640" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FiveYearDisclosureDomain" xlink:label="Locator_us-gaap_FiveYearDisclosureDomain_13641"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_MoreThanThreeAndWithinFourYearsFromBalanceSheetDateMember" xlink:label="Locator_us-gaap_MoreThanThreeAndWithinFourYearsFromBalanceSheetDateMember_13642"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_FiveYearDisclosureDomain_13641" xlink:to="Locator_us-gaap_MoreThanThreeAndWithinFourYearsFromBalanceSheetDateMember_13642" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CommodityPriceRiskLineItems" xlink:label="Locator_exc_CommodityPriceRiskLineItems_13615"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CommodityPriceRiskTable" xlink:label="Locator_exc_CommodityPriceRiskTable_13616"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="Locator_exc_CommodityPriceRiskLineItems_13615" xlink:to="Locator_exc_CommodityPriceRiskTable_13616" order="0.5" xbrldt:contextElement="segment" xbrldt:closed="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CommodityPriceRiskTable" xlink:label="Locator_exc_CommodityPriceRiskTable_13617"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_13618"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_exc_CommodityPriceRiskTable_13617" xlink:to="Locator_dei_LegalEntityAxis_13618" order="0.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CommodityPriceRiskTable" xlink:label="Locator_exc_CommodityPriceRiskTable_13619"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DerivativeFinancialInstrumentsFiveYearDisclosureAxis" xlink:label="Locator_exc_DerivativeFinancialInstrumentsFiveYearDisclosureAxis_13620"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_exc_CommodityPriceRiskTable_13619" xlink:to="Locator_exc_DerivativeFinancialInstrumentsFiveYearDisclosureAxis_13620" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DerivativeFinancialInstrumentsFiveYearDisclosureAxis" xlink:label="Locator_exc_DerivativeFinancialInstrumentsFiveYearDisclosureAxis_13595"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FiveYearDisclosureDomain" xlink:label="Locator_us-gaap_FiveYearDisclosureDomain_13596"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="Locator_exc_DerivativeFinancialInstrumentsFiveYearDisclosureAxis_13595" xlink:to="Locator_us-gaap_FiveYearDisclosureDomain_13596" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DerivativeFinancialInstrumentsFiveYearDisclosureAxis" xlink:label="Locator_exc_DerivativeFinancialInstrumentsFiveYearDisclosureAxis_13633"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FiveYearDisclosureDomain" xlink:label="Locator_us-gaap_FiveYearDisclosureDomain_13634"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_exc_DerivativeFinancialInstrumentsFiveYearDisclosureAxis_13633" xlink:to="Locator_us-gaap_FiveYearDisclosureDomain_13634" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CommodityPriceRiskLineItems" xlink:label="Locator_exc_CommodityPriceRiskLineItems_13643"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PercentOfExpectedGenerationBeingHedgedAbstract" xlink:label="Locator_exc_PercentOfExpectedGenerationBeingHedgedAbstract_13644"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_CommodityPriceRiskLineItems_13643" xlink:to="Locator_exc_PercentOfExpectedGenerationBeingHedgedAbstract_13644" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PercentOfExpectedGenerationBeingHedgedAbstract" xlink:label="Locator_exc_PercentOfExpectedGenerationBeingHedgedAbstract_13645"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_MinimumPercentOfExpectedGenerationBeingHedged" xlink:label="Locator_exc_MinimumPercentOfExpectedGenerationBeingHedged_13646"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_PercentOfExpectedGenerationBeingHedgedAbstract_13645" xlink:to="Locator_exc_MinimumPercentOfExpectedGenerationBeingHedged_13646" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PercentOfExpectedGenerationBeingHedgedAbstract" xlink:label="Locator_exc_PercentOfExpectedGenerationBeingHedgedAbstract_13647"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_MaximumPercentOfExpectedGenerationBeingHedged" xlink:label="Locator_exc_MaximumPercentOfExpectedGenerationBeingHedged_13648"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_PercentOfExpectedGenerationBeingHedgedAbstract_13647" xlink:to="Locator_exc_MaximumPercentOfExpectedGenerationBeingHedged_13648" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CommodityPriceRiskLineItems" xlink:label="Locator_exc_CommodityPriceRiskLineItems_13649"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SwapContractVolumesAbstract" xlink:label="Locator_exc_SwapContractVolumesAbstract_13650"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_CommodityPriceRiskLineItems_13649" xlink:to="Locator_exc_SwapContractVolumesAbstract_13650" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SwapContractVolumesAbstract" xlink:label="Locator_exc_SwapContractVolumesAbstract_13651"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SwapContractVolumes" xlink:label="Locator_exc_SwapContractVolumes_13652"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_SwapContractVolumesAbstract_13651" xlink:to="Locator_exc_SwapContractVolumes_13652" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CommodityPriceRiskLineItems" xlink:label="Locator_exc_CommodityPriceRiskLineItems_13653"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PercentOfGasPurchasesBeingHedgedAbstract" xlink:label="Locator_exc_PercentOfGasPurchasesBeingHedgedAbstract_13654"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_CommodityPriceRiskLineItems_13653" xlink:to="Locator_exc_PercentOfGasPurchasesBeingHedgedAbstract_13654" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PercentOfGasPurchasesBeingHedgedAbstract" xlink:label="Locator_exc_PercentOfGasPurchasesBeingHedgedAbstract_13655"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EstimatedPercentOfGasPurchasesBeingHedged" xlink:label="Locator_exc_EstimatedPercentOfGasPurchasesBeingHedged_13656"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_PercentOfGasPurchasesBeingHedgedAbstract_13655" xlink:to="Locator_exc_EstimatedPercentOfGasPurchasesBeingHedged_13656" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CommodityPriceRiskLineItems" xlink:label="Locator_exc_CommodityPriceRiskLineItems_13657"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ProprietaryTradingVolumesAbstract" xlink:label="Locator_exc_ProprietaryTradingVolumesAbstract_13658"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_CommodityPriceRiskLineItems_13657" xlink:to="Locator_exc_ProprietaryTradingVolumesAbstract_13658" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ProprietaryTradingVolumesAbstract" xlink:label="Locator_exc_ProprietaryTradingVolumesAbstract_13659"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ProprietaryTradingVolumes" xlink:label="Locator_exc_ProprietaryTradingVolumes_13660"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_ProprietaryTradingVolumesAbstract_13659" xlink:to="Locator_exc_ProprietaryTradingVolumes_13660" order="1.0" xbrldt:usable="true"/> |
| | </definitionLink> |
| <definitionLink xlink:type="extended" xlink:role="http://exeloncorp.com/role/DisclosureDerivativeFinancialInstrumentsCreditRiskDetails"> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_13753"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_13754"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_dei_LegalEntityAxis_13753" xlink:to="Locator_dei_EntityDomain_13754" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_13755"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ExelonGenerationCoLLCMember" xlink:label="Locator_exc_ExelonGenerationCoLLCMember_13756"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_13755" xlink:to="Locator_exc_ExelonGenerationCoLLCMember_13756" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_13757"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CommonwealthEdisonCoMember" xlink:label="Locator_exc_CommonwealthEdisonCoMember_13758"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_13757" xlink:to="Locator_exc_CommonwealthEdisonCoMember_13758" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_13759"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PecoEnergyCoMember" xlink:label="Locator_exc_PecoEnergyCoMember_13760"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_13759" xlink:to="Locator_exc_PecoEnergyCoMember_13760" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_13761"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BaltimoreGasAndElectricCompanyMember" xlink:label="Locator_exc_BaltimoreGasAndElectricCompanyMember_13762"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_13761" xlink:to="Locator_exc_BaltimoreGasAndElectricCompanyMember_13762" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_13763"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OtherSegmentMember" xlink:label="Locator_exc_OtherSegmentMember_13764"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_13763" xlink:to="Locator_exc_OtherSegmentMember_13764" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CreditRiskExposureLineItems" xlink:label="Locator_exc_CreditRiskExposureLineItems_13697"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CreditRiskExposureTable" xlink:label="Locator_exc_CreditRiskExposureTable_13698"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="Locator_exc_CreditRiskExposureLineItems_13697" xlink:to="Locator_exc_CreditRiskExposureTable_13698" order="0.5" xbrldt:contextElement="segment" xbrldt:closed="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CreditRiskExposureTable" xlink:label="Locator_exc_CreditRiskExposureTable_13749"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_13750"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_exc_CreditRiskExposureTable_13749" xlink:to="Locator_dei_LegalEntityAxis_13750" order="0.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CreditRiskExposureTable" xlink:label="Locator_exc_CreditRiskExposureTable_13751"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CreditRiskExposureAxis" xlink:label="Locator_exc_CreditRiskExposureAxis_13752"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_exc_CreditRiskExposureTable_13751" xlink:to="Locator_exc_CreditRiskExposureAxis_13752" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CreditRiskExposureAxis" xlink:label="Locator_exc_CreditRiskExposureAxis_13689"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CreditRiskExposureDomain" xlink:label="Locator_exc_CreditRiskExposureDomain_13690"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="Locator_exc_CreditRiskExposureAxis_13689" xlink:to="Locator_exc_CreditRiskExposureDomain_13690" order="1.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CreditRiskExposureAxis" xlink:label="Locator_exc_CreditRiskExposureAxis_13765"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CreditRiskExposureDomain" xlink:label="Locator_exc_CreditRiskExposureDomain_13766"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_exc_CreditRiskExposureAxis_13765" xlink:to="Locator_exc_CreditRiskExposureDomain_13766" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CreditRiskExposureDomain" xlink:label="Locator_exc_CreditRiskExposureDomain_13767"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_TotalExposureBeforeCreditCollateralMember" xlink:label="Locator_exc_TotalExposureBeforeCreditCollateralMember_13768"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_CreditRiskExposureDomain_13767" xlink:to="Locator_exc_TotalExposureBeforeCreditCollateralMember_13768" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CreditRiskExposureDomain" xlink:label="Locator_exc_CreditRiskExposureDomain_13769"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CreditCollateralMember" xlink:label="Locator_exc_CreditCollateralMember_13770"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_CreditRiskExposureDomain_13769" xlink:to="Locator_exc_CreditCollateralMember_13770" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CreditRiskExposureDomain" xlink:label="Locator_exc_CreditRiskExposureDomain_13771"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NetExposureMember" xlink:label="Locator_exc_NetExposureMember_13772"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_CreditRiskExposureDomain_13771" xlink:to="Locator_exc_NetExposureMember_13772" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CreditRiskExposureDomain" xlink:label="Locator_exc_CreditRiskExposureDomain_13773"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NumberOfCounterpartiesGreaterThanTenPercentOfNetExposureMember" xlink:label="Locator_exc_NumberOfCounterpartiesGreaterThanTenPercentOfNetExposureMember_13774"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_CreditRiskExposureDomain_13773" xlink:to="Locator_exc_NumberOfCounterpartiesGreaterThanTenPercentOfNetExposureMember_13774" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CreditRiskExposureDomain" xlink:label="Locator_exc_CreditRiskExposureDomain_13775"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NetExposureOfCounterpartiesGreaterThanTenPercentOfNetExposureMember" xlink:label="Locator_exc_NetExposureOfCounterpartiesGreaterThanTenPercentOfNetExposureMember_13776"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_CreditRiskExposureDomain_13775" xlink:to="Locator_exc_NetExposureOfCounterpartiesGreaterThanTenPercentOfNetExposureMember_13776" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CreditRiskExposureLineItems" xlink:label="Locator_exc_CreditRiskExposureLineItems_13777"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CreditRiskAbstract" xlink:label="Locator_exc_CreditRiskAbstract_13778"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_CreditRiskExposureLineItems_13777" xlink:to="Locator_exc_CreditRiskAbstract_13778" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CreditRiskAbstract" xlink:label="Locator_exc_CreditRiskAbstract_13779"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_InvestmentGradeExternalCreditRating" xlink:label="Locator_exc_InvestmentGradeExternalCreditRating_13780"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_CreditRiskAbstract_13779" xlink:to="Locator_exc_InvestmentGradeExternalCreditRating_13780" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CreditRiskAbstract" xlink:label="Locator_exc_CreditRiskAbstract_13781"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NonInvestmentGradeExternalCreditRating" xlink:label="Locator_exc_NonInvestmentGradeExternalCreditRating_13782"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_CreditRiskAbstract_13781" xlink:to="Locator_exc_NonInvestmentGradeExternalCreditRating_13782" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CreditRiskAbstract" xlink:label="Locator_exc_CreditRiskAbstract_13783"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_InvestmentGradeInternalCreditRating" xlink:label="Locator_exc_InvestmentGradeInternalCreditRating_13784"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_CreditRiskAbstract_13783" xlink:to="Locator_exc_InvestmentGradeInternalCreditRating_13784" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CreditRiskAbstract" xlink:label="Locator_exc_CreditRiskAbstract_13785"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NoninvestmentGradeInternalCreditRating" xlink:label="Locator_exc_NoninvestmentGradeInternalCreditRating_13786"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_CreditRiskAbstract_13785" xlink:to="Locator_exc_NoninvestmentGradeInternalCreditRating_13786" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CreditRiskAbstract" xlink:label="Locator_exc_CreditRiskAbstract_13787"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_TotalCreditRiskExposure" xlink:label="Locator_exc_TotalCreditRiskExposure_13788"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_CreditRiskAbstract_13787" xlink:to="Locator_exc_TotalCreditRiskExposure_13788" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CreditRiskAbstract" xlink:label="Locator_exc_CreditRiskAbstract_13789"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FinancialInstitutionsCreditRiskExposure" xlink:label="Locator_exc_FinancialInstitutionsCreditRiskExposure_13790"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_CreditRiskAbstract_13789" xlink:to="Locator_exc_FinancialInstitutionsCreditRiskExposure_13790" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CreditRiskAbstract" xlink:label="Locator_exc_CreditRiskAbstract_13791"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_InvestorOwnedUtilitiesMarketersAndPowerProducersCreditRiskExposure" xlink:label="Locator_exc_InvestorOwnedUtilitiesMarketersAndPowerProducersCreditRiskExposure_13792"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_CreditRiskAbstract_13791" xlink:to="Locator_exc_InvestorOwnedUtilitiesMarketersAndPowerProducersCreditRiskExposure_13792" order="7.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CreditRiskAbstract" xlink:label="Locator_exc_CreditRiskAbstract_13793"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_EnergyCooperativesAndMunicipalities" xlink:label="Locator_exc_EnergyCooperativesAndMunicipalities_13794"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_CreditRiskAbstract_13793" xlink:to="Locator_exc_EnergyCooperativesAndMunicipalities_13794" order="8.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CreditRiskAbstract" xlink:label="Locator_exc_CreditRiskAbstract_13795"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CoalCreditRiskExposure" xlink:label="Locator_exc_CoalCreditRiskExposure_13796"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_CreditRiskAbstract_13795" xlink:to="Locator_exc_CoalCreditRiskExposure_13796" order="9.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CreditRiskAbstract" xlink:label="Locator_exc_CreditRiskAbstract_13797"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OtherCreditRiskExposure" xlink:label="Locator_exc_OtherCreditRiskExposure_13798"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_CreditRiskAbstract_13797" xlink:to="Locator_exc_OtherCreditRiskExposure_13798" order="10.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CreditRiskAbstract" xlink:label="Locator_exc_CreditRiskAbstract_13799"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_TotalCounterpartyCreditRiskExposure" xlink:label="Locator_exc_TotalCounterpartyCreditRiskExposure_13800"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_CreditRiskAbstract_13799" xlink:to="Locator_exc_TotalCounterpartyCreditRiskExposure_13800" order="11.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CreditRiskExposureLineItems" xlink:label="Locator_exc_CreditRiskExposureLineItems_13801"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DueFromRelatedPartiesCurrentAbstract" xlink:label="Locator_us-gaap_DueFromRelatedPartiesCurrentAbstract_13802"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_CreditRiskExposureLineItems_13801" xlink:to="Locator_us-gaap_DueFromRelatedPartiesCurrentAbstract_13802" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DueFromRelatedPartiesCurrentAbstract" xlink:label="Locator_us-gaap_DueFromRelatedPartiesCurrentAbstract_13803"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DueFromAffiliateCurrentElectricUtility" xlink:label="Locator_exc_DueFromAffiliateCurrentElectricUtility_13804"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DueFromRelatedPartiesCurrentAbstract_13803" xlink:to="Locator_exc_DueFromAffiliateCurrentElectricUtility_13804" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DueFromRelatedPartiesCurrentAbstract" xlink:label="Locator_us-gaap_DueFromRelatedPartiesCurrentAbstract_13805"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_DueFromAffiliateCurrentElectricGasUtility" xlink:label="Locator_exc_DueFromAffiliateCurrentElectricGasUtility_13806"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_us-gaap_DueFromRelatedPartiesCurrentAbstract_13805" xlink:to="Locator_exc_DueFromAffiliateCurrentElectricGasUtility_13806" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CreditRiskExposureLineItems" xlink:label="Locator_exc_CreditRiskExposureLineItems_13807"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NaturalGasSupplyAndManagementAgreementCreditExposureAbstract" xlink:label="Locator_exc_NaturalGasSupplyAndManagementAgreementCreditExposureAbstract_13808"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_CreditRiskExposureLineItems_13807" xlink:to="Locator_exc_NaturalGasSupplyAndManagementAgreementCreditExposureAbstract_13808" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NaturalGasSupplyAndManagementAgreementCreditExposureAbstract" xlink:label="Locator_exc_NaturalGasSupplyAndManagementAgreementCreditExposureAbstract_13809"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NaturalGasAssetManagerParentalGuarantee" xlink:label="Locator_exc_NaturalGasAssetManagerParentalGuarantee_13810"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_NaturalGasSupplyAndManagementAgreementCreditExposureAbstract_13809" xlink:to="Locator_exc_NaturalGasAssetManagerParentalGuarantee_13810" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NaturalGasSupplyAndManagementAgreementCreditExposureAbstract" xlink:label="Locator_exc_NaturalGasSupplyAndManagementAgreementCreditExposureAbstract_13811"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NaturalGasSupplyAndManagementAgreementCreditExposure" xlink:label="Locator_exc_NaturalGasSupplyAndManagementAgreementCreditExposure_13812"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_NaturalGasSupplyAndManagementAgreementCreditExposureAbstract_13811" xlink:to="Locator_exc_NaturalGasSupplyAndManagementAgreementCreditExposure_13812" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NaturalGasSupplyAndManagementAgreementCreditExposureAbstract" xlink:label="Locator_exc_NaturalGasSupplyAndManagementAgreementCreditExposureAbstract_13813"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CreditExposureUnderOffSystemSales" xlink:label="Locator_exc_CreditExposureUnderOffSystemSales_13814"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_NaturalGasSupplyAndManagementAgreementCreditExposureAbstract_13813" xlink:to="Locator_exc_CreditExposureUnderOffSystemSales_13814" order="3.0" xbrldt:usable="true"/> |
| | </definitionLink> |
| <definitionLink xlink:type="extended" xlink:role="http://exeloncorp.com/role/DerivativeFinancialInstrumentsCollateralAndContingentRelatedFeaturesDetails"> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_13887"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_13888"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="Locator_dei_LegalEntityAxis_13887" xlink:to="Locator_dei_EntityDomain_13888" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_13889"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ExelonGenerationCoLLCMember" xlink:label="Locator_exc_ExelonGenerationCoLLCMember_13890"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_13889" xlink:to="Locator_exc_ExelonGenerationCoLLCMember_13890" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_13891"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CommonwealthEdisonCoMember" xlink:label="Locator_exc_CommonwealthEdisonCoMember_13892"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_13891" xlink:to="Locator_exc_CommonwealthEdisonCoMember_13892" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_13893"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_PecoEnergyCoMember" xlink:label="Locator_exc_PecoEnergyCoMember_13894"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_13893" xlink:to="Locator_exc_PecoEnergyCoMember_13894" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_13895"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_BaltimoreGasAndElectricCompanyMember" xlink:label="Locator_exc_BaltimoreGasAndElectricCompanyMember_13896"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_13895" xlink:to="Locator_exc_BaltimoreGasAndElectricCompanyMember_13896" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityDomain" xlink:label="Locator_dei_EntityDomain_13897"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_OtherSegmentMember" xlink:label="Locator_exc_OtherSegmentMember_13898"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_dei_EntityDomain_13897" xlink:to="Locator_exc_OtherSegmentMember_13898" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CollateralAndContingentRelatedFeaturesLineItems" xlink:label="Locator_exc_CollateralAndContingentRelatedFeaturesLineItems_13851"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CollateralAndContingentRelatedFeaturesTable" xlink:label="Locator_exc_CollateralAndContingentRelatedFeaturesTable_13852"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="Locator_exc_CollateralAndContingentRelatedFeaturesLineItems_13851" xlink:to="Locator_exc_CollateralAndContingentRelatedFeaturesTable_13852" order="0.5" xbrldt:contextElement="segment" xbrldt:closed="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CollateralAndContingentRelatedFeaturesTable" xlink:label="Locator_exc_CollateralAndContingentRelatedFeaturesTable_13885"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LegalEntityAxis" xlink:label="Locator_dei_LegalEntityAxis_13886"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="Locator_exc_CollateralAndContingentRelatedFeaturesTable_13885" xlink:to="Locator_dei_LegalEntityAxis_13886" order="0.0"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CollateralAndContingentRelatedFeaturesLineItems" xlink:label="Locator_exc_CollateralAndContingentRelatedFeaturesLineItems_13899"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CollateralAndContingentRelatedFeaturesAbstract" xlink:label="Locator_exc_CollateralAndContingentRelatedFeaturesAbstract_13900"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_CollateralAndContingentRelatedFeaturesLineItems_13899" xlink:to="Locator_exc_CollateralAndContingentRelatedFeaturesAbstract_13900" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CollateralAndContingentRelatedFeaturesAbstract" xlink:label="Locator_exc_CollateralAndContingentRelatedFeaturesAbstract_13901"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_FairValueOfDerivativeLiabilityWithCreditRiskRelatedContingentFeatures" xlink:label="Locator_exc_FairValueOfDerivativeLiabilityWithCreditRiskRelatedContingentFeatures_13902"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_CollateralAndContingentRelatedFeaturesAbstract_13901" xlink:to="Locator_exc_FairValueOfDerivativeLiabilityWithCreditRiskRelatedContingentFeatures_13902" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CollateralAndContingentRelatedFeaturesAbstract" xlink:label="Locator_exc_CollateralAndContingentRelatedFeaturesAbstract_13903"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_ContractualRightOfOffset" xlink:label="Locator_exc_ContractualRightOfOffset_13904"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_CollateralAndContingentRelatedFeaturesAbstract_13903" xlink:to="Locator_exc_ContractualRightOfOffset_13904" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CollateralAndContingentRelatedFeaturesAbstract" xlink:label="Locator_exc_CollateralAndContingentRelatedFeaturesAbstract_13905"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_NetAssetLiabilityPositionAfterContractualRightOfOffset" xlink:label="Locator_exc_NetAssetLiabilityPositionAfterContractualRightOfOffset_13906"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_CollateralAndContingentRelatedFeaturesAbstract_13905" xlink:to="Locator_exc_NetAssetLiabilityPositionAfterContractualRightOfOffset_13906" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CollateralAndContingentRelatedFeaturesAbstract" xlink:label="Locator_exc_CollateralAndContingentRelatedFeaturesAbstract_13907"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AmountOfHeldPostedCollateral" xlink:label="Locator_exc_AmountOfHeldPostedCollateral_13908"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_CollateralAndContingentRelatedFeaturesAbstract_13907" xlink:to="Locator_exc_AmountOfHeldPostedCollateral_13908" order="4.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CollateralAndContingentRelatedFeaturesAbstract" xlink:label="Locator_exc_CollateralAndContingentRelatedFeaturesAbstract_13909"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_IncrementalCollateralForCreditRatingDowngrade" xlink:label="Locator_exc_IncrementalCollateralForCreditRatingDowngrade_13910"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_CollateralAndContingentRelatedFeaturesAbstract_13909" xlink:to="Locator_exc_IncrementalCollateralForCreditRatingDowngrade_13910" order="5.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CollateralAndContingentRelatedFeaturesAbstract" xlink:label="Locator_exc_CollateralAndContingentRelatedFeaturesAbstract_13911"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_IncrementalCollateralForLossOfInvestmentGradeCreditRating" xlink:label="Locator_exc_IncrementalCollateralForLossOfInvestmentGradeCreditRating_13912"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_CollateralAndContingentRelatedFeaturesAbstract_13911" xlink:to="Locator_exc_IncrementalCollateralForLossOfInvestmentGradeCreditRating_13912" order="6.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CollateralAndContingentRelatedFeaturesAbstract" xlink:label="Locator_exc_CollateralAndContingentRelatedFeaturesAbstract_13913"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CashCollateralHeld" xlink:label="Locator_exc_CashCollateralHeld_13914"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_CollateralAndContingentRelatedFeaturesAbstract_13913" xlink:to="Locator_exc_CashCollateralHeld_13914" order="7.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CollateralAndContingentRelatedFeaturesAbstract" xlink:label="Locator_exc_CollateralAndContingentRelatedFeaturesAbstract_13915"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CashCollateralPosted" xlink:label="Locator_exc_CashCollateralPosted_13916"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_CollateralAndContingentRelatedFeaturesAbstract_13915" xlink:to="Locator_exc_CashCollateralPosted_13916" order="8.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CollateralAndContingentRelatedFeaturesAbstract" xlink:label="Locator_exc_CollateralAndContingentRelatedFeaturesAbstract_13917"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_LettersOfCreditHeld" xlink:label="Locator_exc_LettersOfCreditHeld_13918"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_CollateralAndContingentRelatedFeaturesAbstract_13917" xlink:to="Locator_exc_LettersOfCreditHeld_13918" order="9.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CollateralAndContingentRelatedFeaturesAbstract" xlink:label="Locator_exc_CollateralAndContingentRelatedFeaturesAbstract_13919"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_LettersOfCreditPosted" xlink:label="Locator_exc_LettersOfCreditPosted_13920"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_CollateralAndContingentRelatedFeaturesAbstract_13919" xlink:to="Locator_exc_LettersOfCreditPosted_13920" order="10.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CollateralAndContingentRelatedFeaturesAbstract" xlink:label="Locator_exc_CollateralAndContingentRelatedFeaturesAbstract_13921"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LineOfCreditFacilityAmountOutstanding" xlink:label="Locator_us-gaap_LineOfCreditFacilityAmountOutstanding_13922"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_CollateralAndContingentRelatedFeaturesAbstract_13921" xlink:to="Locator_us-gaap_LineOfCreditFacilityAmountOutstanding_13922" order="11.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CollateralAndContingentRelatedFeaturesLineItems" xlink:label="Locator_exc_CollateralAndContingentRelatedFeaturesLineItems_13923"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SwapContractCollateralPostingLimitAbstract" xlink:label="Locator_exc_SwapContractCollateralPostingLimitAbstract_13924"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_CollateralAndContingentRelatedFeaturesLineItems_13923" xlink:to="Locator_exc_SwapContractCollateralPostingLimitAbstract_13924" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SwapContractCollateralPostingLimitAbstract" xlink:label="Locator_exc_SwapContractCollateralPostingLimitAbstract_13925"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SwapContractCollateralPostingLimit" xlink:label="Locator_exc_SwapContractCollateralPostingLimit_13926"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_SwapContractCollateralPostingLimitAbstract_13925" xlink:to="Locator_exc_SwapContractCollateralPostingLimit_13926" order="1.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SwapContractCollateralPostingLimitAbstract" xlink:label="Locator_exc_SwapContractCollateralPostingLimitAbstract_13927"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CreditDerivativeCollateralHeldDirectlyOrByThirdPartiesMonetaryAmount" xlink:label="Locator_exc_CreditDerivativeCollateralHeldDirectlyOrByThirdPartiesMonetaryAmount_13928"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_SwapContractCollateralPostingLimitAbstract_13927" xlink:to="Locator_exc_CreditDerivativeCollateralHeldDirectlyOrByThirdPartiesMonetaryAmount_13928" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_SwapContractCollateralPostingLimitAbstract" xlink:label="Locator_exc_SwapContractCollateralPostingLimitAbstract_13929"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_InterestRateFairValueHedgeAssetAtFairValue" xlink:label="Locator_us-gaap_InterestRateFairValueHedgeAssetAtFairValue_13930"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_SwapContractCollateralPostingLimitAbstract_13929" xlink:to="Locator_us-gaap_InterestRateFairValueHedgeAssetAtFairValue_13930" order="3.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CollateralAndContingentRelatedFeaturesLineItems" xlink:label="Locator_exc_CollateralAndContingentRelatedFeaturesLineItems_13931"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AccountingForOffsettingOfAmountsRelatedToCertainContractsAbstract" xlink:label="Locator_exc_AccountingForOffsettingOfAmountsRelatedToCertainContractsAbstract_13932"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_CollateralAndContingentRelatedFeaturesLineItems_13931" xlink:to="Locator_exc_AccountingForOffsettingOfAmountsRelatedToCertainContractsAbstract_13932" order="2.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_AccountingForOffsettingOfAmountsRelatedToCertainContractsAbstract" xlink:label="Locator_exc_AccountingForOffsettingOfAmountsRelatedToCertainContractsAbstract_13933"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_MasterNettingArrangementsAbstract" xlink:label="Locator_exc_MasterNettingArrangementsAbstract_13934"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_AccountingForOffsettingOfAmountsRelatedToCertainContractsAbstract_13933" xlink:to="Locator_exc_MasterNettingArrangementsAbstract_13934" order="0.0" xbrldt:usable="true"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_MasterNettingArrangementsAbstract" xlink:label="Locator_exc_MasterNettingArrangementsAbstract_13935"/> |
| | <loc xlink:type="locator" xlink:href="exc-20120930.xsd#exc_CashCollateralReceivedNotOffsetAgainstNetDerivativePosition" xlink:label="Locator_exc_CashCollateralReceivedNotOffsetAgainstNetDerivativePosition_13936"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="Locator_exc_MasterNettingArrangementsAbstract_13935" xlink:to="Locator_exc_CashCollateralReceivedNotOffsetAgainstNetDerivativePosition_13936" order="1.0" xbrldt:usable="true"/> |
| | </definitionLink> |
| </linkbase> |