| | | | | | | | | | | | | | | | | | | | | |
<?xml version="1.0" encoding="windows-1252"?> |
<FilingSummary xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema"> |
| <Version> 2.3.0.15 </Version> |
| <ProcessingTime/> |
| <ReportFormat> Html </ReportFormat> |
| <ReportType/> |
| <ContextCount> 457 </ContextCount> |
| <ElementCount> 475 </ElementCount> |
| <EntityCount> 1 </EntityCount> |
| <FootnotesReported> true </FootnotesReported> |
| <SegmentCount> 77 </SegmentCount> |
| <ScenarioCount> 0 </ScenarioCount> |
| <TuplesReported> false </TuplesReported> |
| <UnitCount> 5 </UnitCount> |
| <MyReports> |
| | <Report> |
| | | <IsDefault> true </IsDefault> |
| | | <ContainEmbeddedReports> false </ContainEmbeddedReports> |
| | | <HtmlFileName> R1.htm </HtmlFileName> |
| | | <LongName> 00090 - Document - Document And Entity Information </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.humana.com/2010-12-31/role/DocumentDocumentAndEntityInformation </Role> |
| | | <ShortName> Document And Entity Information </ShortName> |
| | | </Report> |
| | <Report> |
| | | <IsDefault> false </IsDefault> |
| | | <ContainEmbeddedReports> false </ContainEmbeddedReports> |
| | | <HtmlFileName> R2.htm </HtmlFileName> |
| | | <LongName> 00100 - Statement - Consolidated Balance Sheets </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.humana.com/2010-12-31/role/StatementConsolidatedBalanceSheets </Role> |
| | | <ShortName> Consolidated Balance Sheets </ShortName> |
| | | </Report> |
| | <Report> |
| | | <IsDefault> false </IsDefault> |
| | | <ContainEmbeddedReports> false </ContainEmbeddedReports> |
| | | <HtmlFileName> R3.htm </HtmlFileName> |
| | | <LongName> 00105 - Statement - Consolidated Balance Sheets (Parenthetical) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.humana.com/2010-12-31/role/StatementConsolidatedBalanceSheetsParenthetical </Role> |
| | | <ShortName> Consolidated Balance Sheets (Parenthetical) </ShortName> |
| | | </Report> |
| | <Report> |
| | | <IsDefault> false </IsDefault> |
| | | <ContainEmbeddedReports> false </ContainEmbeddedReports> |
| | | <HtmlFileName> R4.htm </HtmlFileName> |
| | | <LongName> 00200 - Statement - Consolidated Statements Of Income </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.humana.com/2010-12-31/role/StatementConsolidatedStatementsOfIncome </Role> |
| | | <ShortName> Consolidated Statements Of Income </ShortName> |
| | | </Report> |
| | <Report> |
| | | <IsDefault> false </IsDefault> |
| | | <ContainEmbeddedReports> false </ContainEmbeddedReports> |
| | | <HtmlFileName> R5.htm </HtmlFileName> |
| | | <LongName> 00300 - Statement - Consolidated Statements Of Stockholders' Equity </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.humana.com/2010-12-31/role/StatementConsolidatedStatementsOfStockholdersEquity </Role> |
| | | <ShortName> Consolidated Statements Of Stockholders' Equity </ShortName> |
| | | </Report> |
| | <Report> |
| | | <IsDefault> false </IsDefault> |
| | | <ContainEmbeddedReports> false </ContainEmbeddedReports> |
| | | <HtmlFileName> R6.htm </HtmlFileName> |
| | | <LongName> 00305 - Statement - Consolidated Statements Of Stockholders' Equity (Parenthetical) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.humana.com/2010-12-31/role/StatementConsolidatedStatementsOfStockholdersEquityParenthetical </Role> |
| | | <ShortName> Consolidated Statements Of Stockholders' Equity (Parenthetical) </ShortName> |
| | | </Report> |
| | <Report> |
| | | <IsDefault> false </IsDefault> |
| | | <ContainEmbeddedReports> false </ContainEmbeddedReports> |
| | | <HtmlFileName> R7.htm </HtmlFileName> |
| | | <LongName> 00400 - Statement - Consolidated Statements Of Cash Flows </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.humana.com/2010-12-31/role/StatementConsolidatedStatementsOfCashFlows </Role> |
| | | <ShortName> Consolidated Statements Of Cash Flows </ShortName> |
| | | </Report> |
| | <Report> |
| | | <IsDefault> false </IsDefault> |
| | | <ContainEmbeddedReports> false </ContainEmbeddedReports> |
| | | <HtmlFileName> R8.htm </HtmlFileName> |
| | | <LongName> 10101 - Disclosure - Reporting Entity </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.humana.com/2010-12-31/role/DisclosureReportingEntity </Role> |
| | | <ShortName> Reporting Entity </ShortName> |
| | | </Report> |
| | <Report> |
| | | <IsDefault> false </IsDefault> |
| | | <ContainEmbeddedReports> false </ContainEmbeddedReports> |
| | | <HtmlFileName> R9.htm </HtmlFileName> |
| | | <LongName> 10201 - Disclosure - Summary Of Significant Accounting Policies </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.humana.com/2010-12-31/role/DisclosureSummaryOfSignificantAccountingPolicies </Role> |
| | | <ShortName> Summary Of Significant Accounting Policies </ShortName> |
| | | </Report> |
| | <Report> |
| | | <IsDefault> false </IsDefault> |
| | | <ContainEmbeddedReports> false </ContainEmbeddedReports> |
| | | <HtmlFileName> R10.htm </HtmlFileName> |
| | | <LongName> 10301 - Disclosure - Acquisitions </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.humana.com/2010-12-31/role/DisclosureAcquisitions </Role> |
| | | <ShortName> Acquisitions </ShortName> |
| | | </Report> |
| | <Report> |
| | | <IsDefault> false </IsDefault> |
| | | <ContainEmbeddedReports> false </ContainEmbeddedReports> |
| | | <HtmlFileName> R11.htm </HtmlFileName> |
| | | <LongName> 10401 - Disclosure - Investment Securities </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.humana.com/2010-12-31/role/DisclosureInvestmentSecurities </Role> |
| | | <ShortName> Investment Securities </ShortName> |
| | | </Report> |
| | <Report> |
| | | <IsDefault> false </IsDefault> |
| | | <ContainEmbeddedReports> false </ContainEmbeddedReports> |
| | | <HtmlFileName> R12.htm </HtmlFileName> |
| | | <LongName> 10501 - Disclosure - Fair Value </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.humana.com/2010-12-31/role/DisclosureFairValue </Role> |
| | | <ShortName> Fair Value </ShortName> |
| | | </Report> |
| | <Report> |
| | | <IsDefault> false </IsDefault> |
| | | <ContainEmbeddedReports> false </ContainEmbeddedReports> |
| | | <HtmlFileName> R13.htm </HtmlFileName> |
| | | <LongName> 10601 - Disclosure - Medicare Part D </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.humana.com/2010-12-31/role/DisclosureMedicarePartD </Role> |
| | | <ShortName> Medicare Part D </ShortName> |
| | | </Report> |
| | <Report> |
| | | <IsDefault> false </IsDefault> |
| | | <ContainEmbeddedReports> false </ContainEmbeddedReports> |
| | | <HtmlFileName> R14.htm </HtmlFileName> |
| | | <LongName> 10701 - Disclosure - Property And Equipment, Net </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.humana.com/2010-12-31/role/DisclosurePropertyAndEquipmentNet </Role> |
| | | <ShortName> Property And Equipment, Net </ShortName> |
| | | </Report> |
| | <Report> |
| | | <IsDefault> false </IsDefault> |
| | | <ContainEmbeddedReports> false </ContainEmbeddedReports> |
| | | <HtmlFileName> R15.htm </HtmlFileName> |
| | | <LongName> 10801 - Disclosure - Goodwill And Other Intangible Assets </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.humana.com/2010-12-31/role/DisclosureGoodwillAndOtherIntangibleAssets </Role> |
| | | <ShortName> Goodwill And Other Intangible Assets </ShortName> |
| | | </Report> |
| | <Report> |
| | | <IsDefault> false </IsDefault> |
| | | <ContainEmbeddedReports> false </ContainEmbeddedReports> |
| | | <HtmlFileName> R16.htm </HtmlFileName> |
| | | <LongName> 10901 - Disclosure - Benefits Payable </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.humana.com/2010-12-31/role/DisclosureBenefitsPayable </Role> |
| | | <ShortName> Benefits Payable </ShortName> |
| | | </Report> |
| | <Report> |
| | | <IsDefault> false </IsDefault> |
| | | <ContainEmbeddedReports> false </ContainEmbeddedReports> |
| | | <HtmlFileName> R17.htm </HtmlFileName> |
| | | <LongName> 11001 - Disclosure - Income Taxes </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.humana.com/2010-12-31/role/DisclosureIncomeTaxes </Role> |
| | | <ShortName> Income Taxes </ShortName> |
| | | </Report> |
| | <Report> |
| | | <IsDefault> false </IsDefault> |
| | | <ContainEmbeddedReports> false </ContainEmbeddedReports> |
| | | <HtmlFileName> R18.htm </HtmlFileName> |
| | | <LongName> 11101 - Disclosure - Debt </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.humana.com/2010-12-31/role/DisclosureDebt </Role> |
| | | <ShortName> Debt </ShortName> |
| | | </Report> |
| | <Report> |
| | | <IsDefault> false </IsDefault> |
| | | <ContainEmbeddedReports> false </ContainEmbeddedReports> |
| | | <HtmlFileName> R19.htm </HtmlFileName> |
| | | <LongName> 11201 - Disclosure - Derivative Financial Instruments </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.humana.com/2010-12-31/role/DisclosureDerivativeFinancialInstruments </Role> |
| | | <ShortName> Derivative Financial Instruments </ShortName> |
| | | </Report> |
| | <Report> |
| | | <IsDefault> false </IsDefault> |
| | | <ContainEmbeddedReports> false </ContainEmbeddedReports> |
| | | <HtmlFileName> R20.htm </HtmlFileName> |
| | | <LongName> 11301 - Disclosure - Employee Benefit Plans </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.humana.com/2010-12-31/role/DisclosureEmployeeBenefitPlans </Role> |
| | | <ShortName> Employee Benefit Plans </ShortName> |
| | | </Report> |
| | <Report> |
| | | <IsDefault> false </IsDefault> |
| | | <ContainEmbeddedReports> false </ContainEmbeddedReports> |
| | | <HtmlFileName> R21.htm </HtmlFileName> |
| | | <LongName> 11401 - Disclosure - Earnings Per Common Share Computation </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.humana.com/2010-12-31/role/DisclosureEarningsPerCommonShareComputation </Role> |
| | | <ShortName> Earnings Per Common Share Computation </ShortName> |
| | | </Report> |
| | <Report> |
| | | <IsDefault> false </IsDefault> |
| | | <ContainEmbeddedReports> false </ContainEmbeddedReports> |
| | | <HtmlFileName> R22.htm </HtmlFileName> |
| | | <LongName> 11501 - Disclosure - Stockholders' Equity </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.humana.com/2010-12-31/role/DisclosureStockholdersEquity </Role> |
| | | <ShortName> Stockholders' Equity </ShortName> |
| | | </Report> |
| | <Report> |
| | | <IsDefault> false </IsDefault> |
| | | <ContainEmbeddedReports> false </ContainEmbeddedReports> |
| | | <HtmlFileName> R23.htm </HtmlFileName> |
| | | <LongName> 11601 - Disclosure - Commitments, Guarantees And Contingencies </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.humana.com/2010-12-31/role/DisclosureCommitmentsGuaranteesAndContingencies </Role> |
| | | <ShortName> Commitments, Guarantees And Contingencies </ShortName> |
| | | </Report> |
| | <Report> |
| | | <IsDefault> false </IsDefault> |
| | | <ContainEmbeddedReports> false </ContainEmbeddedReports> |
| | | <HtmlFileName> R24.htm </HtmlFileName> |
| | | <LongName> 11701 - Disclosure - Segment Information </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.humana.com/2010-12-31/role/DisclosureSegmentInformation </Role> |
| | | <ShortName> Segment Information </ShortName> |
| | | </Report> |
| | <Report> |
| | | <IsDefault> false </IsDefault> |
| | | <ContainEmbeddedReports> false </ContainEmbeddedReports> |
| | | <HtmlFileName> R25.htm </HtmlFileName> |
| | | <LongName> 11801 - Disclosure - Expenses Associated With Long-Duration Insurance Products </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.humana.com/2010-12-31/role/DisclosureExpensesAssociatedWithLongDurationInsuranceProducts </Role> |
| | | <ShortName> Expenses Associated With Long-Duration Insurance Products </ShortName> |
| | | </Report> |
| | <Report> |
| | | <IsDefault> false </IsDefault> |
| | | <ContainEmbeddedReports> false </ContainEmbeddedReports> |
| | | <HtmlFileName> R26.htm </HtmlFileName> |
| | | <LongName> 11901 - Disclosure - Reinsurance </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.humana.com/2010-12-31/role/DisclosureReinsurance </Role> |
| | | <ShortName> Reinsurance </ShortName> |
| | | </Report> |
| | <Report> |
| | | <IsDefault> false </IsDefault> |
| | | <ContainEmbeddedReports> false </ContainEmbeddedReports> |
| | | <HtmlFileName> R27.htm </HtmlFileName> |
| | | <LongName> 12001 - Disclosure - Quarterly Financial Information </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.humana.com/2010-12-31/role/DisclosureQuarterlyFinancialInformation </Role> |
| | | <ShortName> Quarterly Financial Information </ShortName> |
| | | </Report> |
| | <Report> |
| | | <IsDefault> false </IsDefault> |
| | | <ContainEmbeddedReports> false </ContainEmbeddedReports> |
| | | <HtmlFileName> R28.htm </HtmlFileName> |
| | | <LongName> 20202 - Disclosure - Summary Of Significant Accounting Policies (Policy) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.humana.com/2010-12-31/role/DisclosureSummaryOfSignificantAccountingPoliciesPolicy </Role> |
| | | <ShortName> Summary Of Significant Accounting Policies (Policy) </ShortName> |
| | | </Report> |
| | <Report> |
| | | <IsDefault> false </IsDefault> |
| | | <ContainEmbeddedReports> false </ContainEmbeddedReports> |
| | | <HtmlFileName> R29.htm </HtmlFileName> |
| | | <LongName> 30303 - Disclosure - Acquisitions (Tables) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.humana.com/2010-12-31/role/DisclosureAcquisitionsTables </Role> |
| | | <ShortName> Acquisitions (Tables) </ShortName> |
| | | </Report> |
| | <Report> |
| | | <IsDefault> false </IsDefault> |
| | | <ContainEmbeddedReports> false </ContainEmbeddedReports> |
| | | <HtmlFileName> R30.htm </HtmlFileName> |
| | | <LongName> 30403 - Disclosure - Investment Securities (Tables) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.humana.com/2010-12-31/role/DisclosureInvestmentSecuritiesTables </Role> |
| | | <ShortName> Investment Securities (Tables) </ShortName> |
| | | </Report> |
| | <Report> |
| | | <IsDefault> false </IsDefault> |
| | | <ContainEmbeddedReports> false </ContainEmbeddedReports> |
| | | <HtmlFileName> R31.htm </HtmlFileName> |
| | | <LongName> 30503 - Disclosure - Fair Value (Tables) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.humana.com/2010-12-31/role/DisclosureFairValueTables </Role> |
| | | <ShortName> Fair Value (Tables) </ShortName> |
| | | </Report> |
| | <Report> |
| | | <IsDefault> false </IsDefault> |
| | | <ContainEmbeddedReports> false </ContainEmbeddedReports> |
| | | <HtmlFileName> R32.htm </HtmlFileName> |
| | | <LongName> 30603 - Disclosure - Medicare Part D (Tables) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.humana.com/2010-12-31/role/DisclosureMedicarePartDTables </Role> |
| | | <ShortName> Medicare Part D (Tables) </ShortName> |
| | | </Report> |
| | <Report> |
| | | <IsDefault> false </IsDefault> |
| | | <ContainEmbeddedReports> false </ContainEmbeddedReports> |
| | | <HtmlFileName> R33.htm </HtmlFileName> |
| | | <LongName> 30703 - Disclosure - Property And Equipment, Net (Tables) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.humana.com/2010-12-31/role/DisclosurePropertyAndEquipmentNetTables </Role> |
| | | <ShortName> Property And Equipment, Net (Tables) </ShortName> |
| | | </Report> |
| | <Report> |
| | | <IsDefault> false </IsDefault> |
| | | <ContainEmbeddedReports> false </ContainEmbeddedReports> |
| | | <HtmlFileName> R34.htm </HtmlFileName> |
| | | <LongName> 30803 - Disclosure - Goodwill And Other Intangible Assets (Tables) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.humana.com/2010-12-31/role/DisclosureGoodwillAndOtherIntangibleAssetsTables </Role> |
| | | <ShortName> Goodwill And Other Intangible Assets (Tables) </ShortName> |
| | | </Report> |
| | <Report> |
| | | <IsDefault> false </IsDefault> |
| | | <ContainEmbeddedReports> false </ContainEmbeddedReports> |
| | | <HtmlFileName> R35.htm </HtmlFileName> |
| | | <LongName> 30903 - Disclosure - Benefits Payable (Tables) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.humana.com/2010-12-31/role/DisclosureBenefitsPayableTables </Role> |
| | | <ShortName> Benefits Payable (Tables) </ShortName> |
| | | </Report> |
| | <Report> |
| | | <IsDefault> false </IsDefault> |
| | | <ContainEmbeddedReports> false </ContainEmbeddedReports> |
| | | <HtmlFileName> R36.htm </HtmlFileName> |
| | | <LongName> 31003 - Disclosure - Income Taxes (Tables) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.humana.com/2010-12-31/role/DisclosureIncomeTaxesTables </Role> |
| | | <ShortName> Income Taxes (Tables) </ShortName> |
| | | </Report> |
| | <Report> |
| | | <IsDefault> false </IsDefault> |
| | | <ContainEmbeddedReports> false </ContainEmbeddedReports> |
| | | <HtmlFileName> R37.htm </HtmlFileName> |
| | | <LongName> 31103 - Disclosure - Debt (Tables) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.humana.com/2010-12-31/role/DisclosureDebtTables </Role> |
| | | <ShortName> Debt (Tables) </ShortName> |
| | | </Report> |
| | <Report> |
| | | <IsDefault> false </IsDefault> |
| | | <ContainEmbeddedReports> false </ContainEmbeddedReports> |
| | | <HtmlFileName> R38.htm </HtmlFileName> |
| | | <LongName> 31303 - Disclosure - Employee Benefit Plans (Tables) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.humana.com/2010-12-31/role/DisclosureEmployeeBenefitPlansTables </Role> |
| | | <ShortName> Employee Benefit Plans (Tables) </ShortName> |
| | | </Report> |
| | <Report> |
| | | <IsDefault> false </IsDefault> |
| | | <ContainEmbeddedReports> false </ContainEmbeddedReports> |
| | | <HtmlFileName> R39.htm </HtmlFileName> |
| | | <LongName> 31403 - Disclosure - Earnings Per Common Share Computation (Tables) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.humana.com/2010-12-31/role/DisclosureEarningsPerCommonShareComputationTables </Role> |
| | | <ShortName> Earnings Per Common Share Computation (Tables) </ShortName> |
| | | </Report> |
| | <Report> |
| | | <IsDefault> false </IsDefault> |
| | | <ContainEmbeddedReports> false </ContainEmbeddedReports> |
| | | <HtmlFileName> R40.htm </HtmlFileName> |
| | | <LongName> 31603 - Disclosure - Commitments, Guarantees And Contingencies (Tables) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.humana.com/2010-12-31/role/DisclosureCommitmentsGuaranteesAndContingenciesTables </Role> |
| | | <ShortName> Commitments, Guarantees And Contingencies (Tables) </ShortName> |
| | | </Report> |
| | <Report> |
| | | <IsDefault> false </IsDefault> |
| | | <ContainEmbeddedReports> false </ContainEmbeddedReports> |
| | | <HtmlFileName> R41.htm </HtmlFileName> |
| | | <LongName> 31703 - Disclosure - Segment Information (Tables) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.humana.com/2010-12-31/role/DisclosureSegmentInformationTables </Role> |
| | | <ShortName> Segment Information (Tables) </ShortName> |
| | | </Report> |
| | <Report> |
| | | <IsDefault> false </IsDefault> |
| | | <ContainEmbeddedReports> false </ContainEmbeddedReports> |
| | | <HtmlFileName> R42.htm </HtmlFileName> |
| | | <LongName> 31803 - Disclosure - Expenses Associated With Long-Duration Insurance Products (Tables) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.humana.com/2010-12-31/role/DisclosureExpensesAssociatedWithLongDurationInsuranceProductsTables </Role> |
| | | <ShortName> Expenses Associated With Long-Duration Insurance Products (Tables) </ShortName> |
| | | </Report> |
| | <Report> |
| | | <IsDefault> false </IsDefault> |
| | | <ContainEmbeddedReports> false </ContainEmbeddedReports> |
| | | <HtmlFileName> R43.htm </HtmlFileName> |
| | | <LongName> 31903 - Disclosure - Reinsurance (Tables) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.humana.com/2010-12-31/role/DisclosureReinsuranceTables </Role> |
| | | <ShortName> Reinsurance (Tables) </ShortName> |
| | | </Report> |
| | <Report> |
| | | <IsDefault> false </IsDefault> |
| | | <ContainEmbeddedReports> false </ContainEmbeddedReports> |
| | | <HtmlFileName> R44.htm </HtmlFileName> |
| | | <LongName> 32003 - Disclosure - Quarterly Financial Information (Tables) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.humana.com/2010-12-31/role/DisclosureQuarterlyFinancialInformationTables </Role> |
| | | <ShortName> Quarterly Financial Information (Tables) </ShortName> |
| | | </Report> |
| | <Report> |
| | | <IsDefault> false </IsDefault> |
| | | <ContainEmbeddedReports> false </ContainEmbeddedReports> |
| | | <HtmlFileName> R45.htm </HtmlFileName> |
| | | <LongName> 40101 - Disclosure - Reporting Entity (Narrative) (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.humana.com/2010-12-31/role/DisclosureReportingEntityNarrativeDetails </Role> |
| | | <ShortName> Reporting Entity (Narrative) (Details) </ShortName> |
| | | </Report> |
| | <Report> |
| | | <IsDefault> false </IsDefault> |
| | | <ContainEmbeddedReports> false </ContainEmbeddedReports> |
| | | <HtmlFileName> R46.htm </HtmlFileName> |
| | | <LongName> 40201 - Disclosure - Summary Of Significant Accounting Policies (Narrative) (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.humana.com/2010-12-31/role/DisclosureSummaryOfSignificantAccountingPoliciesNarrativeDetails </Role> |
| | | <ShortName> Summary Of Significant Accounting Policies (Narrative) (Details) </ShortName> |
| | | </Report> |
| | <Report> |
| | | <IsDefault> false </IsDefault> |
| | | <ContainEmbeddedReports> false </ContainEmbeddedReports> |
| | | <HtmlFileName> R47.htm </HtmlFileName> |
| | | <LongName> 40301 - Disclosure - Acquisitions (Narrative) (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.humana.com/2010-12-31/role/DisclosureAcquisitionsNarrativeDetails </Role> |
| | | <ShortName> Acquisitions (Narrative) (Details) </ShortName> |
| | | </Report> |
| | <Report> |
| | | <IsDefault> false </IsDefault> |
| | | <ContainEmbeddedReports> false </ContainEmbeddedReports> |
| | | <HtmlFileName> R48.htm </HtmlFileName> |
| | | <LongName> 40302 - Disclosure - Acquisitions (Fair Values Of Assets Acquired And Liabilities Assumed At The Date Of The Acquisition) (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.humana.com/2010-12-31/role/DisclosureAcquisitionsFairValuesOfAssetsAcquiredAndLiabilitiesAssumedAtDateOfAcquisitionDetails </Role> |
| | | <ShortName> Acquisitions (Fair Values Of Assets Acquired And Liabilities Assumed At The Date Of The Acquisition) (Details) </ShortName> |
| | | </Report> |
| | <Report> |
| | | <IsDefault> false </IsDefault> |
| | | <ContainEmbeddedReports> false </ContainEmbeddedReports> |
| | | <HtmlFileName> R49.htm </HtmlFileName> |
| | | <LongName> 40401 - Disclosure - Investment Securities (Narrative) (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.humana.com/2010-12-31/role/DisclosureInvestmentSecuritiesNarrativeDetails </Role> |
| | | <ShortName> Investment Securities (Narrative) (Details) </ShortName> |
| | | </Report> |
| | <Report> |
| | | <IsDefault> false </IsDefault> |
| | | <ContainEmbeddedReports> false </ContainEmbeddedReports> |
| | | <HtmlFileName> R50.htm </HtmlFileName> |
| | | <LongName> 40402 - Disclosure - Investment Securities (Investment Securities Classified As Current And Long-Term) (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.humana.com/2010-12-31/role/DisclosureInvestmentSecuritiesInvestmentSecuritiesClassifiedAsCurrentAndLongTermDetails </Role> |
| | | <ShortName> Investment Securities (Investment Securities Classified As Current And Long-Term) (Details) </ShortName> |
| | | </Report> |
| | <Report> |
| | | <IsDefault> false </IsDefault> |
| | | <ContainEmbeddedReports> false </ContainEmbeddedReports> |
| | | <HtmlFileName> R51.htm </HtmlFileName> |
| | | <LongName> 40403 - Disclosure - Investment Securities (Gross Unrealized Losses And Fair Values Aggregated By Investment Category And Length Of Time In Continuous Unrealized Loss Position) (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.humana.com/2010-12-31/role/DisclosureInvestmentSecuritiesGrossUnrealizedLossesAndFairValuesAggregatedByInvestmentCategoryAndLengthOfTimeInContinuousUnrealizedLossPositionDetails </Role> |
| | | <ShortName> Investment Securities (Gross Unrealized Losses And Fair Values Aggregated By Investment Category And Length Of Time In Continuous Unrealized Loss Position) (Details) </ShortName> |
| | | </Report> |
| | <Report> |
| | | <IsDefault> false </IsDefault> |
| | | <ContainEmbeddedReports> false </ContainEmbeddedReports> |
| | | <HtmlFileName> R52.htm </HtmlFileName> |
| | | <LongName> 40404 - Disclosure - Investment Securities (Detail Of Realized Gains (Losses) Related To Investment Securities And Included With Investment Income) (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.humana.com/2010-12-31/role/DisclosureInvestmentSecuritiesDetailOfRealizedGainsLossesRelatedToInvestmentSecuritiesAndIncludedWithInvestmentIncomeDetails </Role> |
| | | <ShortName> Investment Securities (Detail Of Realized Gains (Losses) Related To Investment Securities And Included With Investment Income) (Details) </ShortName> |
| | | </Report> |
| | <Report> |
| | | <IsDefault> false </IsDefault> |
| | | <ContainEmbeddedReports> false </ContainEmbeddedReports> |
| | | <HtmlFileName> R53.htm </HtmlFileName> |
| | | <LongName> 40405 - Disclosure - Investment Securities (Contractual Maturities Of Debt Securities Available For Sale) (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.humana.com/2010-12-31/role/DisclosureInvestmentSecuritiesContractualMaturitiesOfDebtSecuritiesAvailableForSaleDetails </Role> |
| | | <ShortName> Investment Securities (Contractual Maturities Of Debt Securities Available For Sale) (Details) </ShortName> |
| | | </Report> |
| | <Report> |
| | | <IsDefault> false </IsDefault> |
| | | <ContainEmbeddedReports> false </ContainEmbeddedReports> |
| | | <HtmlFileName> R54.htm </HtmlFileName> |
| | | <LongName> 40501 - Disclosure - Fair Value (Narrative) (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.humana.com/2010-12-31/role/DisclosureFairValueNarrativeDetails </Role> |
| | | <ShortName> Fair Value (Narrative) (Details) </ShortName> |
| | | </Report> |
| | <Report> |
| | | <IsDefault> false </IsDefault> |
| | | <ContainEmbeddedReports> false </ContainEmbeddedReports> |
| | | <HtmlFileName> R55.htm </HtmlFileName> |
| | | <LongName> 40502 - Disclosure - Fair Value (Financial Assets Measured At Fair Value On A Recurring Basis) (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.humana.com/2010-12-31/role/DisclosureFairValueFinancialAssetsMeasuredAtFairValueOnRecurringBasisDetails </Role> |
| | | <ShortName> Fair Value (Financial Assets Measured At Fair Value On A Recurring Basis) (Details) </ShortName> |
| | | </Report> |
| | <Report> |
| | | <IsDefault> false </IsDefault> |
| | | <ContainEmbeddedReports> false </ContainEmbeddedReports> |
| | | <HtmlFileName> R56.htm </HtmlFileName> |
| | | <LongName> 40503 - Disclosure - Fair Value (Changes In Fair Value Of Assets Measured Using Significant Unobservable Inputs) (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.humana.com/2010-12-31/role/DisclosureFairValueChangesInFairValueOfAssetsMeasuredUsingSignificantUnobservableInputsDetails </Role> |
| | | <ShortName> Fair Value (Changes In Fair Value Of Assets Measured Using Significant Unobservable Inputs) (Details) </ShortName> |
| | | </Report> |
| | <Report> |
| | | <IsDefault> false </IsDefault> |
| | | <ContainEmbeddedReports> false </ContainEmbeddedReports> |
| | | <HtmlFileName> R57.htm </HtmlFileName> |
| | | <LongName> 40601 - Disclosure - Medicare Part D (Balance Sheet Accounts Associated With Medicare Part D) (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.humana.com/2010-12-31/role/DisclosureMedicarePartDBalanceSheetAccountsAssociatedWithMedicarePartDDetails </Role> |
| | | <ShortName> Medicare Part D (Balance Sheet Accounts Associated With Medicare Part D) (Details) </ShortName> |
| | | </Report> |
| | <Report> |
| | | <IsDefault> false </IsDefault> |
| | | <ContainEmbeddedReports> false </ContainEmbeddedReports> |
| | | <HtmlFileName> R58.htm </HtmlFileName> |
| | | <LongName> 40701 - Disclosure - Property And Equipment, Net (Narrative) (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.humana.com/2010-12-31/role/DisclosurePropertyAndEquipmentNetNarrativeDetails </Role> |
| | | <ShortName> Property And Equipment, Net (Narrative) (Details) </ShortName> |
| | | </Report> |
| | <Report> |
| | | <IsDefault> false </IsDefault> |
| | | <ContainEmbeddedReports> false </ContainEmbeddedReports> |
| | | <HtmlFileName> R59.htm </HtmlFileName> |
| | | <LongName> 40702 - Disclosure - Property And Equipment, Net (Property And Equipment) (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.humana.com/2010-12-31/role/DisclosurePropertyAndEquipmentNetPropertyAndEquipmentDetails </Role> |
| | | <ShortName> Property And Equipment, Net (Property And Equipment) (Details) </ShortName> |
| | | </Report> |
| | <Report> |
| | | <IsDefault> false </IsDefault> |
| | | <ContainEmbeddedReports> false </ContainEmbeddedReports> |
| | | <HtmlFileName> R60.htm </HtmlFileName> |
| | | <LongName> 40801 - Disclosure - Goodwill And Other Intangible Assets (Narrative) (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.humana.com/2010-12-31/role/DisclosureGoodwillAndOtherIntangibleAssetsNarrativeDetails </Role> |
| | | <ShortName> Goodwill And Other Intangible Assets (Narrative) (Details) </ShortName> |
| | | </Report> |
| | <Report> |
| | | <IsDefault> false </IsDefault> |
| | | <ContainEmbeddedReports> false </ContainEmbeddedReports> |
| | | <HtmlFileName> R61.htm </HtmlFileName> |
| | | <LongName> 40802 - Disclosure - Goodwill And Other Intangible Assets (Changes In Carrying Amount Of Goodwill By Reportable Segment) (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.humana.com/2010-12-31/role/DisclosureGoodwillAndOtherIntangibleAssetsChangesInCarryingAmountOfGoodwillByReportableSegmentDetails </Role> |
| | | <ShortName> Goodwill And Other Intangible Assets (Changes In Carrying Amount Of Goodwill By Reportable Segment) (Details) </ShortName> |
| | | </Report> |
| | <Report> |
| | | <IsDefault> false </IsDefault> |
| | | <ContainEmbeddedReports> false </ContainEmbeddedReports> |
| | | <HtmlFileName> R62.htm </HtmlFileName> |
| | | <LongName> 40803 - Disclosure - Goodwill And Other Intangible Assets (Detail Of Intangible Assets Classified As Other Long-Term Assets) (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.humana.com/2010-12-31/role/DisclosureGoodwillAndOtherIntangibleAssetsDetailOfIntangibleAssetsClassifiedAsOtherLongTermAssetsDetails </Role> |
| | | <ShortName> Goodwill And Other Intangible Assets (Detail Of Intangible Assets Classified As Other Long-Term Assets) (Details) </ShortName> |
| | | </Report> |
| | <Report> |
| | | <IsDefault> false </IsDefault> |
| | | <ContainEmbeddedReports> false </ContainEmbeddedReports> |
| | | <HtmlFileName> R63.htm </HtmlFileName> |
| | | <LongName> 40804 - Disclosure - Goodwill And Other Intangible Assets (Estimate Of Amortization Expense) (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.humana.com/2010-12-31/role/DisclosureGoodwillAndOtherIntangibleAssetsEstimateOfAmortizationExpenseDetails </Role> |
| | | <ShortName> Goodwill And Other Intangible Assets (Estimate Of Amortization Expense) (Details) </ShortName> |
| | | </Report> |
| | <Report> |
| | | <IsDefault> false </IsDefault> |
| | | <ContainEmbeddedReports> false </ContainEmbeddedReports> |
| | | <HtmlFileName> R64.htm </HtmlFileName> |
| | | <LongName> 40901 - Disclosure - Benefits Payable (Narrative) (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.humana.com/2010-12-31/role/DisclosureBenefitsPayableNarrativeDetails </Role> |
| | | <ShortName> Benefits Payable (Narrative) (Details) </ShortName> |
| | | </Report> |
| | <Report> |
| | | <IsDefault> false </IsDefault> |
| | | <ContainEmbeddedReports> false </ContainEmbeddedReports> |
| | | <HtmlFileName> R65.htm </HtmlFileName> |
| | | <LongName> 40902 - Disclosure - Benefits Payable (Activity In Benefits Payable) (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.humana.com/2010-12-31/role/DisclosureBenefitsPayableActivityInBenefitsPayableDetails </Role> |
| | | <ShortName> Benefits Payable (Activity In Benefits Payable) (Details) </ShortName> |
| | | </Report> |
| | <Report> |
| | | <IsDefault> false </IsDefault> |
| | | <ContainEmbeddedReports> false </ContainEmbeddedReports> |
| | | <HtmlFileName> R66.htm </HtmlFileName> |
| | | <LongName> 40903 - Disclosure - Benefits Payable (Benefit Expenses Excluded From Activity In Benefits Payable) (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.humana.com/2010-12-31/role/DisclosureBenefitsPayableBenefitExpensesExcludedFromActivityInBenefitsPayableDetails </Role> |
| | | <ShortName> Benefits Payable (Benefit Expenses Excluded From Activity In Benefits Payable) (Details) </ShortName> |
| | | </Report> |
| | <Report> |
| | | <IsDefault> false </IsDefault> |
| | | <ContainEmbeddedReports> false </ContainEmbeddedReports> |
| | | <HtmlFileName> R67.htm </HtmlFileName> |
| | | <LongName> 41001 - Disclosure - Income Taxes (Narrative) (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.humana.com/2010-12-31/role/DisclosureIncomeTaxesNarrativeDetails </Role> |
| | | <ShortName> Income Taxes (Narrative) (Details) </ShortName> |
| | | </Report> |
| | <Report> |
| | | <IsDefault> false </IsDefault> |
| | | <ContainEmbeddedReports> false </ContainEmbeddedReports> |
| | | <HtmlFileName> R68.htm </HtmlFileName> |
| | | <LongName> 41002 - Disclosure - Income Taxes (Elements That Comprise Provision For Income Taxes) (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.humana.com/2010-12-31/role/DisclosureIncomeTaxesElementsThatCompriseProvisionForIncomeTaxesDetails </Role> |
| | | <ShortName> Income Taxes (Elements That Comprise Provision For Income Taxes) (Details) </ShortName> |
| | | </Report> |
| | <Report> |
| | | <IsDefault> false </IsDefault> |
| | | <ContainEmbeddedReports> false </ContainEmbeddedReports> |
| | | <HtmlFileName> R69.htm </HtmlFileName> |
| | | <LongName> 41003 - Disclosure - Income Taxes (Reconciliation Of Provision For Income Taxes And The Amount Computed Using The Federal Statutory Rate) (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.humana.com/2010-12-31/role/DisclosureIncomeTaxesReconciliationOfProvisionForIncomeTaxesAndAmountComputedUsingFederalStatutoryRateDetails </Role> |
| | | <ShortName> Income Taxes (Reconciliation Of Provision For Income Taxes And The Amount Computed Using The Federal Statutory Rate) (Details) </ShortName> |
| | | </Report> |
| | <Report> |
| | | <IsDefault> false </IsDefault> |
| | | <ContainEmbeddedReports> false </ContainEmbeddedReports> |
| | | <HtmlFileName> R70.htm </HtmlFileName> |
| | | <LongName> 41004 - Disclosure - Income Taxes (Principal Components Of Net Deferred Tax Balances) (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.humana.com/2010-12-31/role/DisclosureIncomeTaxesPrincipalComponentsOfNetDeferredTaxBalancesDetails </Role> |
| | | <ShortName> Income Taxes (Principal Components Of Net Deferred Tax Balances) (Details) </ShortName> |
| | | </Report> |
| | <Report> |
| | | <IsDefault> false </IsDefault> |
| | | <ContainEmbeddedReports> false </ContainEmbeddedReports> |
| | | <HtmlFileName> R71.htm </HtmlFileName> |
| | | <LongName> 41101 - Disclosure - Debt (Narrative) (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.humana.com/2010-12-31/role/DisclosureDebtNarrativeDetails </Role> |
| | | <ShortName> Debt (Narrative) (Details) </ShortName> |
| | | </Report> |
| | <Report> |
| | | <IsDefault> false </IsDefault> |
| | | <ContainEmbeddedReports> false </ContainEmbeddedReports> |
| | | <HtmlFileName> R72.htm </HtmlFileName> |
| | | <LongName> 41102 - Disclosure - Debt (Carrying Value Of Long-Term Debt Of Outstanding) (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.humana.com/2010-12-31/role/DisclosureDebtCarryingValueOfLongTermDebtOfOutstandingDetails </Role> |
| | | <ShortName> Debt (Carrying Value Of Long-Term Debt Of Outstanding) (Details) </ShortName> |
| | | </Report> |
| | <Report> |
| | | <IsDefault> false </IsDefault> |
| | | <ContainEmbeddedReports> false </ContainEmbeddedReports> |
| | | <HtmlFileName> R73.htm </HtmlFileName> |
| | | <LongName> 41201 - Disclosure - Derivative Financial Instruments (Narrative) (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.humana.com/2010-12-31/role/DisclosureDerivativeFinancialInstrumentsNarrativeDetails </Role> |
| | | <ShortName> Derivative Financial Instruments (Narrative) (Details) </ShortName> |
| | | </Report> |
| | <Report> |
| | | <IsDefault> false </IsDefault> |
| | | <ContainEmbeddedReports> false </ContainEmbeddedReports> |
| | | <HtmlFileName> R74.htm </HtmlFileName> |
| | | <LongName> 41301 - Disclosure - Employee Benefit Plans (Narrative) (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.humana.com/2010-12-31/role/DisclosureEmployeeBenefitPlansNarrativeDetails </Role> |
| | | <ShortName> Employee Benefit Plans (Narrative) (Details) </ShortName> |
| | | </Report> |
| | <Report> |
| | | <IsDefault> false </IsDefault> |
| | | <ContainEmbeddedReports> false </ContainEmbeddedReports> |
| | | <HtmlFileName> R75.htm </HtmlFileName> |
| | | <LongName> 41302 - Disclosure - Employee Benefit Plans (Stock-Based Compensation Expense) (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.humana.com/2010-12-31/role/DisclosureEmployeeBenefitPlansStockBasedCompensationExpenseDetails </Role> |
| | | <ShortName> Employee Benefit Plans (Stock-Based Compensation Expense) (Details) </ShortName> |
| | | </Report> |
| | <Report> |
| | | <IsDefault> false </IsDefault> |
| | | <ContainEmbeddedReports> false </ContainEmbeddedReports> |
| | | <HtmlFileName> R76.htm </HtmlFileName> |
| | | <LongName> 41303 - Disclosure - Employee Benefit Plans (Weighted-Average Fair Value Of Stock Options) (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.humana.com/2010-12-31/role/DisclosureEmployeeBenefitPlansWeightedAverageFairValueOfStockOptionsDetails </Role> |
| | | <ShortName> Employee Benefit Plans (Weighted-Average Fair Value Of Stock Options) (Details) </ShortName> |
| | | </Report> |
| | <Report> |
| | | <IsDefault> false </IsDefault> |
| | | <ContainEmbeddedReports> false </ContainEmbeddedReports> |
| | | <HtmlFileName> R77.htm </HtmlFileName> |
| | | <LongName> 41304 - Disclosure - Employee Benefit Plans (Activity For Option Plans) (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.humana.com/2010-12-31/role/DisclosureEmployeeBenefitPlansActivityForOptionPlansDetails </Role> |
| | | <ShortName> Employee Benefit Plans (Activity For Option Plans) (Details) </ShortName> |
| | | </Report> |
| | <Report> |
| | | <IsDefault> false </IsDefault> |
| | | <ContainEmbeddedReports> false </ContainEmbeddedReports> |
| | | <HtmlFileName> R78.htm </HtmlFileName> |
| | | <LongName> 41305 - Disclosure - Employee Benefit Plans (Weighted-Average Grant Date Fair Value Of Restricted Stock Awards) (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.humana.com/2010-12-31/role/DisclosureEmployeeBenefitPlansWeightedAverageGrantDateFairValueOfRestrictedStockAwardsDetails </Role> |
| | | <ShortName> Employee Benefit Plans (Weighted-Average Grant Date Fair Value Of Restricted Stock Awards) (Details) </ShortName> |
| | | </Report> |
| | <Report> |
| | | <IsDefault> false </IsDefault> |
| | | <ContainEmbeddedReports> false </ContainEmbeddedReports> |
| | | <HtmlFileName> R79.htm </HtmlFileName> |
| | | <LongName> 41401 - Disclosure - Earnings Per Common Share Computation (Narrative) (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.humana.com/2010-12-31/role/DisclosureEarningsPerCommonShareComputationNarrativeDetails </Role> |
| | | <ShortName> Earnings Per Common Share Computation (Narrative) (Details) </ShortName> |
| | | </Report> |
| | <Report> |
| | | <IsDefault> false </IsDefault> |
| | | <ContainEmbeddedReports> false </ContainEmbeddedReports> |
| | | <HtmlFileName> R80.htm </HtmlFileName> |
| | | <LongName> 41402 - Disclosure - Earnings Per Common Share Computation (Detail Supporting The Computation Of Basic And Diluted Earnings Per Common Share) (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.humana.com/2010-12-31/role/DisclosureEarningsPerCommonShareComputationDetailSupportingComputationOfBasicAndDilutedEarningsPerCommonShareDetails </Role> |
| | | <ShortName> Earnings Per Common Share Computation (Detail Supporting The Computation Of Basic And Diluted Earnings Per Common Share) (Details) </ShortName> |
| | | </Report> |
| | <Report> |
| | | <IsDefault> false </IsDefault> |
| | | <ContainEmbeddedReports> false </ContainEmbeddedReports> |
| | | <HtmlFileName> R81.htm </HtmlFileName> |
| | | <LongName> 41501 - Disclosure - Stockholders' Equity (Narrative) (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.humana.com/2010-12-31/role/DisclosureStockholdersEquityNarrativeDetails </Role> |
| | | <ShortName> Stockholders' Equity (Narrative) (Details) </ShortName> |
| | | </Report> |
| | <Report> |
| | | <IsDefault> false </IsDefault> |
| | | <ContainEmbeddedReports> false </ContainEmbeddedReports> |
| | | <HtmlFileName> R82.htm </HtmlFileName> |
| | | <LongName> 41601 - Disclosure - Commitments, Guarantees And Contingencies (Narrative) (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.humana.com/2010-12-31/role/DisclosureCommitmentsGuaranteesAndContingenciesNarrativeDetails </Role> |
| | | <ShortName> Commitments, Guarantees And Contingencies (Narrative) (Details) </ShortName> |
| | | </Report> |
| | <Report> |
| | | <IsDefault> false </IsDefault> |
| | | <ContainEmbeddedReports> false </ContainEmbeddedReports> |
| | | <HtmlFileName> R83.htm </HtmlFileName> |
| | | <LongName> 41602 - Disclosure - Commitments, Guarantees And Contingencies (Rent Expense And Sublease Rental Income Associated With Operating Leases) (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.humana.com/2010-12-31/role/DisclosureCommitmentsGuaranteesAndContingenciesRentExpenseAndSubleaseRentalIncomeAssociatedWithOperatingLeasesDetails </Role> |
| | | <ShortName> Commitments, Guarantees And Contingencies (Rent Expense And Sublease Rental Income Associated With Operating Leases) (Details) </ShortName> |
| | | </Report> |
| | <Report> |
| | | <IsDefault> false </IsDefault> |
| | | <ContainEmbeddedReports> false </ContainEmbeddedReports> |
| | | <HtmlFileName> R84.htm </HtmlFileName> |
| | | <LongName> 41603 - Disclosure - Commitments, Guarantees And Contingencies (Future Annual Minimum Payments Due) (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.humana.com/2010-12-31/role/DisclosureCommitmentsGuaranteesAndContingenciesFutureAnnualMinimumPaymentsDueDetails </Role> |
| | | <ShortName> Commitments, Guarantees And Contingencies (Future Annual Minimum Payments Due) (Details) </ShortName> |
| | | </Report> |
| | <Report> |
| | | <IsDefault> false </IsDefault> |
| | | <ContainEmbeddedReports> false </ContainEmbeddedReports> |
| | | <HtmlFileName> R85.htm </HtmlFileName> |
| | | <LongName> 41701 - Disclosure - Segment Information (Narrative) (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.humana.com/2010-12-31/role/DisclosureSegmentInformationNarrativeDetails </Role> |
| | | <ShortName> Segment Information (Narrative) (Details) </ShortName> |
| | | </Report> |
| | <Report> |
| | | <IsDefault> false </IsDefault> |
| | | <ContainEmbeddedReports> false </ContainEmbeddedReports> |
| | | <HtmlFileName> R86.htm </HtmlFileName> |
| | | <LongName> 41702 - Disclosure - Segment Information (Segment Results) (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.humana.com/2010-12-31/role/DisclosureSegmentInformationSegmentResultsDetails </Role> |
| | | <ShortName> Segment Information (Segment Results) (Details) </ShortName> |
| | | </Report> |
| | <Report> |
| | | <IsDefault> false </IsDefault> |
| | | <ContainEmbeddedReports> false </ContainEmbeddedReports> |
| | | <HtmlFileName> R87.htm </HtmlFileName> |
| | | <LongName> 41801 - Disclosure - Expenses Associated With Long-Duration Insurance Products (Narrative) (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.humana.com/2010-12-31/role/DisclosureExpensesAssociatedWithLongDurationInsuranceProductsNarrativeDetails </Role> |
| | | <ShortName> Expenses Associated With Long-Duration Insurance Products (Narrative) (Details) </ShortName> |
| | | </Report> |
| | <Report> |
| | | <IsDefault> false </IsDefault> |
| | | <ContainEmbeddedReports> false </ContainEmbeddedReports> |
| | | <HtmlFileName> R88.htm </HtmlFileName> |
| | | <LongName> 41802 - Disclosure - Expenses Associated With Long-Duration Insurance Products (Schedule Of Deferred Acquisition Cost And Future Policy Benefits Payable With Our Long-Duration Insurance Products) (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.humana.com/2010-12-31/role/DisclosureExpensesAssociatedWithLongDurationInsuranceProductsScheduleOfDeferredAcquisitionCostAndFuturePolicyBenefitsPayableWithOurLongDurationInsuranceProductsDetails </Role> |
| | | <ShortName> Expenses Associated With Long-Duration Insurance Products (Schedule Of Deferred Acquisition Cost And Future Policy Benefits Payable With Our Long-Duration Insurance Products) (Details) </ShortName> |
| | | </Report> |
| | <Report> |
| | | <IsDefault> false </IsDefault> |
| | | <ContainEmbeddedReports> false </ContainEmbeddedReports> |
| | | <HtmlFileName> R89.htm </HtmlFileName> |
| | | <LongName> 41901 - Disclosure - Reinsurance (Narrative) (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.humana.com/2010-12-31/role/DisclosureReinsuranceNarrativeDetails </Role> |
| | | <ShortName> Reinsurance (Narrative) (Details) </ShortName> |
| | | </Report> |
| | <Report> |
| | | <IsDefault> false </IsDefault> |
| | | <ContainEmbeddedReports> false </ContainEmbeddedReports> |
| | | <HtmlFileName> R90.htm </HtmlFileName> |
| | | <LongName> 41902 - Disclosure - Reinsurance (Balance And Financial Rating Related To Reinsurers) (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.humana.com/2010-12-31/role/DisclosureReinsuranceBalanceAndFinancialRatingRelatedToReinsurersDetails </Role> |
| | | <ShortName> Reinsurance (Balance And Financial Rating Related To Reinsurers) (Details) </ShortName> |
| | | </Report> |
| | <Report> |
| | | <IsDefault> false </IsDefault> |
| | | <ContainEmbeddedReports> false </ContainEmbeddedReports> |
| | | <HtmlFileName> R91.htm </HtmlFileName> |
| | | <LongName> 42004 - Disclosure - Quarterly Financial Information (Schedule Summarizing Quarterly Operation Results) (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.humana.com/2010-12-31/role/DisclosureQuarterlyFinancialInformationScheduleSummarizingQuarterlyOperationResultsDetails </Role> |
| | | <ShortName> Quarterly Financial Information (Schedule Summarizing Quarterly Operation Results) (Details) </ShortName> |
| | | </Report> |
| | <Report> |
| | | <IsDefault> false </IsDefault> |
| | | <ContainEmbeddedReports> false </ContainEmbeddedReports> |
| | | <LongName> All Reports </LongName> |
| | | <ReportType> Book </ReportType> |
| | | <ShortName> All Reports </ShortName> |
| | | </Report> |
| | </MyReports> |
| <Logs> |
| | <Log type="Info"> Element us-gaap_LiabilityForFuturePolicyBenefits had a mix of decimals attribute values: -3 -5. </Log> |
| | <Log type="Info"> Element us-gaap_MarketableSecuritiesRealizedGainLossOtherThanTemporaryImpairmentsAmount had a mix of decimals attribute values: -5 -6. </Log> |
| | <Log type="Info"> Element us-gaap_SeniorNotes had a mix of decimals attribute values: -3 -6. </Log> |
| | <Log type="Info"> Element us-gaap_TreasuryStockSharesAcquired had a mix of decimals attribute values: 0 -4. </Log> |
| | <Log type="Info"> Element hum_DividendsToParentWithoutPriorStateRegulatoryApproval had a mix of decimals attribute values: -5 -6. </Log> |
| | <Log type="Info"> Element us-gaap_LiabilityForFuturePolicyBenefits had a mix of decimals attribute values: -3 -5. </Log> |
| | <Log type="Info"> Element us-gaap_LiabilityForFuturePolicyBenefits had a mix of decimals attribute values: -3 -5. </Log> |
| | <Log type="Info"> 'Monetary' elements on report '40301 - Disclosure - Acquisitions (Narrative) (Details)' had a mix of different decimal attribute values. </Log> |
| | <Log type="Info"> 'Monetary' elements on report '40501 - Disclosure - Fair Value (Narrative) (Details)' had a mix of different decimal attribute values. </Log> |
| | <Log type="Info"> 'Monetary' elements on report '41001 - Disclosure - Income Taxes (Narrative) (Details)' had a mix of different decimal attribute values. </Log> |
| | <Log type="Info"> 'Monetary' elements on report '41101 - Disclosure - Debt (Narrative) (Details)' had a mix of different decimal attribute values. </Log> |
| | <Log type="Info"> 'Monetary' elements on report '41301 - Disclosure - Employee Benefit Plans (Narrative) (Details)' had a mix of different decimal attribute values. </Log> |
| | <Log type="Info"> 'Shares' elements on report '41301 - Disclosure - Employee Benefit Plans (Narrative) (Details)' had a mix of different decimal attribute values. </Log> |
| | <Log type="Info"> 'Monetary' elements on report '41501 - Disclosure - Stockholders' Equity (Narrative) (Details)' had a mix of different decimal attribute values. </Log> |
| | <Log type="Info"> 'Monetary' elements on report '41701 - Disclosure - Segment Information (Narrative) (Details)' had a mix of different decimal attribute values. </Log> |
| | <Log type="Info"> 'Monetary' elements on report '41801 - Disclosure - Expenses Associated With Long-Duration Insurance Products (Narrative) (Details)' had a mix of different decimal attribute values. </Log> |
| | <Log type="Info"> 'Monetary' elements on report '41901 - Disclosure - Reinsurance (Narrative) (Details)' had a mix of different decimal attribute values. </Log> |
| | <Log type="Info"> 'Monetary' elements on report '42004 - Disclosure - Quarterly Financial Information (Schedule Summarizing Quarterly Operation Results) (Details)' had a mix of different decimal attribute values. </Log> |
| | <Log type="Info"> Process Flow-Through: 00100 - Statement - Consolidated Balance Sheets </Log> |
| | <Log type="Info"> Process Flow-Through: Removing column 'Dec. 31, 2008' </Log> |
| | <Log type="Info"> Process Flow-Through: Removing column 'Dec. 31, 2007' </Log> |
| | <Log type="Info"> Process Flow-Through: 00105 - Statement - Consolidated Balance Sheets (Parenthetical) </Log> |
| | <Log type="Info"> Process Flow-Through: 00200 - Statement - Consolidated Statements Of Income </Log> |
| | <Log type="Info"> Process Flow-Through: 00305 - Statement - Consolidated Statements Of Stockholders' Equity (Parenthetical) </Log> |
| | <Log type="Info"> Process Flow-Through: 00400 - Statement - Consolidated Statements Of Cash Flows </Log> |
| | </Logs> |
| <InputFiles> |
| | <File> hum-20111031.xml </File> |
| | <File> hum-20111031.xsd </File> |
| | <File> hum-20111031_cal.xml </File> |
| | <File> hum-20111031_def.xml </File> |
| | <File> hum-20111031_lab.xml </File> |
| | <File> hum-20111031_pre.xml </File> |
| | </InputFiles> |
| <SupplementalFiles/> |
| <BaseTaxonomies/> |
| <HasPresentationLinkbase> true </HasPresentationLinkbase> |
| <HasCalculationLinkbase> true </HasCalculationLinkbase> |
| </FilingSummary> |