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| | | <ShortName> Equity (Details) </ShortName> |
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| | | <Role> http://nrucfc.coop/role/GuaranteesGuaranteeLiabilityDetails2 </Role> |
| | | <ShortName> Guarantees - Guarantee Liability (Details 2) </ShortName> |
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| | | <ShortName> Segment Information (Details) </ShortName> |
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| <Logs> |
| | <Log type="Info"> Element nru_DebtInstrumentUnusedBorrowingCapacityAdditionalAmount had a mix of decimals attribute values: -6 0. </Log> |
| | <Log type="Info"> Element nru_LoansAndLeasesReceivableCommercialNetOfDeferredIncomePercentage had a mix of decimals attribute values: 2 4. </Log> |
| | <Log type="Info"> Element us-gaap_DerivativeAssetsLiabilitiesAtFairValueNet had a mix of decimals attribute values: -6 -3. </Log> |
| | <Log type="Info"> Element us-gaap_ForeclosedAssets had a mix of decimals attribute values: -6 -3. </Log> |
| | <Log type="Info"> Element us-gaap_GoodwillAndIntangibleAssetImpairment had a mix of decimals attribute values: -6 -3. </Log> |
| | <Log type="Info"> Element us-gaap_Liabilities had a mix of decimals attribute values: -6 -3. </Log> |
| | <Log type="Info"> Element us-gaap_OperatingIncomeLoss had a mix of decimals attribute values: -6 -3. </Log> |
| | <Log type="Info"> Element us-gaap_OtherCommitment had a mix of decimals attribute values: -6 -3. </Log> |
| | <Log type="Info"> Element us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax had a mix of decimals attribute values: -6 -3. </Log> |
| | <Log type="Info"> Element us-gaap_ShortTermBorrowings had a mix of decimals attribute values: -3 0. </Log> |
| | <Log type="Info"> Columns in Cash Flows statement 'CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)' have maximum duration 182 days and at least 43 values. Shorter duration columns must have at least one fourth (10) as many values. Column '9/1/2013 - 11/30/2013' is shorter (90 days) and has only 4 values, so it is being removed. </Log> |
| | <Log type="Info"> Columns in Cash Flows statement 'CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)' have maximum duration 182 days and at least 43 values. Shorter duration columns must have at least one fourth (10) as many values. Column '9/1/2014 - 11/30/2014' is shorter (90 days) and has only 4 values, so it is being removed. </Log> |
| | <Log type="Info"> 'Monetary' elements on report '2401403 - Disclosure - Summary of Significant Accounting Policies (Details)' had a mix of different decimal attribute values. </Log> |
| | <Log type="Info"> 'Monetary' elements on report '2401404 - Disclosure - Summary of Significant Accounting Policies - Interest Income Table (Details)' had a mix of different decimal attribute values. </Log> |
| | <Log type="Info"> 'Monetary' elements on report '2403403 - Disclosure - Loans and Commitments (Details 2)' had a mix of different decimal attribute values. </Log> |
| | <Log type="Info"> 'Monetary' elements on report '2404402 - Disclosure - Foreclosed Assets (Details)' had a mix of different decimal attribute values. </Log> |
| | <Log type="Info"> 'Monetary' elements on report '2406403 - Disclosure - Long-Term Debt (Details)' had a mix of different decimal attribute values. </Log> |
| | <Log type="Info"> 'Monetary' elements on report '2408402 - Disclosure - Derivative Financial Instruments (Details)' had a mix of different decimal attribute values. </Log> |
| | <Log type="Info"> 'Monetary' elements on report '2409401 - Disclosure - Equity (Details)' had a mix of different decimal attribute values. </Log> |
| | <Log type="Info"> 'Monetary' elements on report '2410402 - Disclosure - Guarantees (Details)' had a mix of different decimal attribute values. </Log> |
| | <Log type="Info"> 'Monetary' elements on report '2410403 - Disclosure - Guarantees - Guarantee Liability (Details 2)' had a mix of different decimal attribute values. </Log> |
| | <Log type="Info"> 'Monetary' elements on report '2412402 - Disclosure - Fair Value of Financial Instruments (Details)' had a mix of different decimal attribute values. </Log> |
| | <Log type="Info"> Process Flow-Through: 1001000 - Statement - CONSOLIDATED BALANCE SHEETS </Log> |
| | <Log type="Info"> Process Flow-Through: Removing column 'Aug. 31, 2014' </Log> |
| | <Log type="Info"> Process Flow-Through: Removing column 'Nov. 30, 2013' </Log> |
| | <Log type="Info"> Process Flow-Through: Removing column 'Aug. 31, 2013' </Log> |
| | <Log type="Info"> Process Flow-Through: Removing column 'May 31, 2013' </Log> |
| | <Log type="Info"> Process Flow-Through: 1002000 - Statement - CONSOLIDATED STATEMENTS OF OPERATIONS </Log> |
| | <Log type="Info"> Process Flow-Through: 1003000 - Statement - CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME </Log> |
| | <Log type="Info"> Process Flow-Through: 1005000 - Statement - CONSOLIDATED STATEMENTS OF CASH FLOWS </Log> |
| | </Logs> |
| <InputFiles> |
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| | <File> nru-20141130.xsd </File> |
| | <File> nru-20141130_cal.xml </File> |
| | <File> nru-20141130_def.xml </File> |
| | <File> nru-20141130_lab.xml </File> |
| | <File> nru-20141130_pre.xml </File> |
| | </InputFiles> |
| <SupplementalFiles/> |
| <BaseTaxonomies/> |
| <HasPresentationLinkbase> true </HasPresentationLinkbase> |
| <HasCalculationLinkbase> true </HasCalculationLinkbase> |
| </FilingSummary> |