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DERIVATIVES ACTIVITIES - Credit Derivatives (Details) (USD $)
 12 Months Ended
Dec. 31, 2014
agency
Dec. 31, 2013
Credit Derivative    
Percentage of receivables from counterparties with collateral agreements 98.00%c_CreditRiskDerivativeAssetsPercentageFromCounterpartiesWithCollateralAgreements 98.00%c_CreditRiskDerivativeAssetsPercentageFromCounterpartiesWithCollateralAgreements
Fair value, Receivable $ 43,796,000,000us-gaap_CreditRiskDerivativeAssetsAtFairValue $ 40,417,000,000us-gaap_CreditRiskDerivativeAssetsAtFairValue
Fair Value, Payable 43,985,000,000us-gaap_CreditRiskDerivativeLiabilitiesAtFairValue 41,359,000,000us-gaap_CreditRiskDerivativeLiabilitiesAtFairValue
Notionals, Protection Purchased 1,116,387,000,000c_CreditDerivativesNotionalAmountPurchasedCreditProtection 1,215,062,000,000c_CreditDerivativesNotionalAmountPurchasedCreditProtection
Notionals, Protection Sold 1,063,858,000,000us-gaap_CreditDerivativeMaximumExposureUndiscounted 1,143,363,000,000us-gaap_CreditDerivativeMaximumExposureUndiscounted
Fair value of derivative in liability position 30,000,000,000us-gaap_DerivativeNetLiabilityPositionAggregateFairValue 26,000,000,000us-gaap_DerivativeNetLiabilityPositionAggregateFairValue
Fair value of collateral already posted 27,000,000,000us-gaap_CollateralAlreadyPostedAggregateFairValue 24,000,000,000us-gaap_CollateralAlreadyPostedAggregateFairValue
Number of rating agencies 3c_CreditDerivativesNumberOfRatingAgencies  
Additional collateral to be posted 2,000,000,000us-gaap_AdditionalCollateralAggregateFairValue  
Collateral to be segregated 100,000,000c_DerivativeCollateralObligationToReturnCashPortionToBeSegregated  
Aggregate cash obligations and collateral requirements 2,100,000,000c_CreditDerivativeAggregateCashObligationsAndCollateralRequirements  
Purchased    
Credit Derivative    
Fair value, Receivable 18,708,000,000us-gaap_CreditRiskDerivativeAssetsAtFairValue
/ us-gaap_PositionAxis
= us-gaap_LongMember		 13,744,000,000us-gaap_CreditRiskDerivativeAssetsAtFairValue
/ us-gaap_PositionAxis
= us-gaap_LongMember
Fair Value, Payable 26,527,000,000us-gaap_CreditRiskDerivativeLiabilitiesAtFairValue
/ us-gaap_PositionAxis
= us-gaap_LongMember		 28,723,000,000us-gaap_CreditRiskDerivativeLiabilitiesAtFairValue
/ us-gaap_PositionAxis
= us-gaap_LongMember
Sold    
Credit Derivative    
Fair value, Receivable 25,088,000,000us-gaap_CreditRiskDerivativeAssetsAtFairValue
/ us-gaap_PositionAxis
= us-gaap_ShortMember		 26,673,000,000us-gaap_CreditRiskDerivativeAssetsAtFairValue
/ us-gaap_PositionAxis
= us-gaap_ShortMember
Fair Value, Payable 17,458,000,000us-gaap_CreditRiskDerivativeLiabilitiesAtFairValue
/ us-gaap_PositionAxis
= us-gaap_ShortMember		 12,636,000,000us-gaap_CreditRiskDerivativeLiabilitiesAtFairValue
/ us-gaap_PositionAxis
= us-gaap_ShortMember
Within 1 year    
Credit Derivative    
Fair value, Receivable 4,356,000,000us-gaap_CreditRiskDerivativeAssetsAtFairValue
/ c_CreditDerivativeByMaturityAxis
= c_CreditDerivativeMaturitiesNextRollingTwelveMonthsMember		 2,901,000,000us-gaap_CreditRiskDerivativeAssetsAtFairValue
/ c_CreditDerivativeByMaturityAxis
= c_CreditDerivativeMaturitiesNextRollingTwelveMonthsMember
Fair Value, Payable 4,278,000,000us-gaap_CreditRiskDerivativeLiabilitiesAtFairValue
/ c_CreditDerivativeByMaturityAxis
= c_CreditDerivativeMaturitiesNextRollingTwelveMonthsMember		 3,262,000,000us-gaap_CreditRiskDerivativeLiabilitiesAtFairValue
/ c_CreditDerivativeByMaturityAxis
= c_CreditDerivativeMaturitiesNextRollingTwelveMonthsMember
Notionals, Protection Purchased 250,489,000,000c_CreditDerivativesNotionalAmountPurchasedCreditProtection
/ c_CreditDerivativeByMaturityAxis
= c_CreditDerivativeMaturitiesNextRollingTwelveMonthsMember		 254,305,000,000c_CreditDerivativesNotionalAmountPurchasedCreditProtection
/ c_CreditDerivativeByMaturityAxis
= c_CreditDerivativeMaturitiesNextRollingTwelveMonthsMember
Notionals, Protection Sold 229,502,000,000us-gaap_CreditDerivativeMaximumExposureUndiscounted
/ c_CreditDerivativeByMaturityAxis
= c_CreditDerivativeMaturitiesNextRollingTwelveMonthsMember		 221,562,000,000us-gaap_CreditDerivativeMaximumExposureUndiscounted
/ c_CreditDerivativeByMaturityAxis
= c_CreditDerivativeMaturitiesNextRollingTwelveMonthsMember
From 1 to 5 years    
Credit Derivative    
Fair value, Receivable 34,692,000,000us-gaap_CreditRiskDerivativeAssetsAtFairValue
/ c_CreditDerivativeByMaturityAxis
= c_CreditDerivativeMaturitiesNextRollingYearTwoThroughFiveMember		 31,674,000,000us-gaap_CreditRiskDerivativeAssetsAtFairValue
/ c_CreditDerivativeByMaturityAxis
= c_CreditDerivativeMaturitiesNextRollingYearTwoThroughFiveMember
Fair Value, Payable 35,160,000,000us-gaap_CreditRiskDerivativeLiabilitiesAtFairValue
/ c_CreditDerivativeByMaturityAxis
= c_CreditDerivativeMaturitiesNextRollingYearTwoThroughFiveMember		 32,349,000,000us-gaap_CreditRiskDerivativeLiabilitiesAtFairValue
/ c_CreditDerivativeByMaturityAxis
= c_CreditDerivativeMaturitiesNextRollingYearTwoThroughFiveMember
Notionals, Protection Purchased 790,251,000,000c_CreditDerivativesNotionalAmountPurchasedCreditProtection
/ c_CreditDerivativeByMaturityAxis
= c_CreditDerivativeMaturitiesNextRollingYearTwoThroughFiveMember		 883,879,000,000c_CreditDerivativesNotionalAmountPurchasedCreditProtection
/ c_CreditDerivativeByMaturityAxis
= c_CreditDerivativeMaturitiesNextRollingYearTwoThroughFiveMember
Notionals, Protection Sold 772,001,000,000us-gaap_CreditDerivativeMaximumExposureUndiscounted
/ c_CreditDerivativeByMaturityAxis
= c_CreditDerivativeMaturitiesNextRollingYearTwoThroughFiveMember		 853,391,000,000us-gaap_CreditDerivativeMaximumExposureUndiscounted
/ c_CreditDerivativeByMaturityAxis
= c_CreditDerivativeMaturitiesNextRollingYearTwoThroughFiveMember
After 5 years    
Credit Derivative    
Fair value, Receivable 4,748,000,000us-gaap_CreditRiskDerivativeAssetsAtFairValue
/ c_CreditDerivativeByMaturityAxis
= c_CreditDerivativeMaturitiesRollingAfterYearFiveMember		 5,842,000,000us-gaap_CreditRiskDerivativeAssetsAtFairValue
/ c_CreditDerivativeByMaturityAxis
= c_CreditDerivativeMaturitiesRollingAfterYearFiveMember
Fair Value, Payable 4,547,000,000us-gaap_CreditRiskDerivativeLiabilitiesAtFairValue
/ c_CreditDerivativeByMaturityAxis
= c_CreditDerivativeMaturitiesRollingAfterYearFiveMember		 5,748,000,000us-gaap_CreditRiskDerivativeLiabilitiesAtFairValue
/ c_CreditDerivativeByMaturityAxis
= c_CreditDerivativeMaturitiesRollingAfterYearFiveMember
Notionals, Protection Purchased 75,647,000,000c_CreditDerivativesNotionalAmountPurchasedCreditProtection
/ c_CreditDerivativeByMaturityAxis
= c_CreditDerivativeMaturitiesRollingAfterYearFiveMember		 76,878,000,000c_CreditDerivativesNotionalAmountPurchasedCreditProtection
/ c_CreditDerivativeByMaturityAxis
= c_CreditDerivativeMaturitiesRollingAfterYearFiveMember
Notionals, Protection Sold 62,355,000,000us-gaap_CreditDerivativeMaximumExposureUndiscounted
/ c_CreditDerivativeByMaturityAxis
= c_CreditDerivativeMaturitiesRollingAfterYearFiveMember		 68,410,000,000us-gaap_CreditDerivativeMaximumExposureUndiscounted
/ c_CreditDerivativeByMaturityAxis
= c_CreditDerivativeMaturitiesRollingAfterYearFiveMember
Investment Grade    
Credit Derivative    
Fair value, Receivable 17,432,000,000us-gaap_CreditRiskDerivativeAssetsAtFairValue
/ us-gaap_ExternalCreditRatingByGroupingAxis
= us-gaap_ExternalCreditRatingInvestmentGradeMember		 17,150,000,000us-gaap_CreditRiskDerivativeAssetsAtFairValue
/ us-gaap_ExternalCreditRatingByGroupingAxis
= us-gaap_ExternalCreditRatingInvestmentGradeMember
Fair Value, Payable 17,182,000,000us-gaap_CreditRiskDerivativeLiabilitiesAtFairValue
/ us-gaap_ExternalCreditRatingByGroupingAxis
= us-gaap_ExternalCreditRatingInvestmentGradeMember		 17,174,000,000us-gaap_CreditRiskDerivativeLiabilitiesAtFairValue
/ us-gaap_ExternalCreditRatingByGroupingAxis
= us-gaap_ExternalCreditRatingInvestmentGradeMember
Notionals, Protection Purchased 824,831,000,000c_CreditDerivativesNotionalAmountPurchasedCreditProtection
/ us-gaap_ExternalCreditRatingByGroupingAxis
= us-gaap_ExternalCreditRatingInvestmentGradeMember		 812,918,000,000c_CreditDerivativesNotionalAmountPurchasedCreditProtection
/ us-gaap_ExternalCreditRatingByGroupingAxis
= us-gaap_ExternalCreditRatingInvestmentGradeMember
Notionals, Protection Sold 786,848,000,000us-gaap_CreditDerivativeMaximumExposureUndiscounted
/ us-gaap_ExternalCreditRatingByGroupingAxis
= us-gaap_ExternalCreditRatingInvestmentGradeMember		 752,640,000,000us-gaap_CreditDerivativeMaximumExposureUndiscounted
/ us-gaap_ExternalCreditRatingByGroupingAxis
= us-gaap_ExternalCreditRatingInvestmentGradeMember
Non-Investment Grade    
Credit Derivative    
Fair value, Receivable 26,364,000,000us-gaap_CreditRiskDerivativeAssetsAtFairValue
/ us-gaap_ExternalCreditRatingByGroupingAxis
= us-gaap_ExternalCreditRatingNonInvestmentGradeMember		 23,267,000,000us-gaap_CreditRiskDerivativeAssetsAtFairValue
/ us-gaap_ExternalCreditRatingByGroupingAxis
= us-gaap_ExternalCreditRatingNonInvestmentGradeMember
Fair Value, Payable 26,803,000,000us-gaap_CreditRiskDerivativeLiabilitiesAtFairValue
/ us-gaap_ExternalCreditRatingByGroupingAxis
= us-gaap_ExternalCreditRatingNonInvestmentGradeMember		 24,185,000,000us-gaap_CreditRiskDerivativeLiabilitiesAtFairValue
/ us-gaap_ExternalCreditRatingByGroupingAxis
= us-gaap_ExternalCreditRatingNonInvestmentGradeMember
Notionals, Protection Purchased 291,556,000,000c_CreditDerivativesNotionalAmountPurchasedCreditProtection
/ us-gaap_ExternalCreditRatingByGroupingAxis
= us-gaap_ExternalCreditRatingNonInvestmentGradeMember		 402,144,000,000c_CreditDerivativesNotionalAmountPurchasedCreditProtection
/ us-gaap_ExternalCreditRatingByGroupingAxis
= us-gaap_ExternalCreditRatingNonInvestmentGradeMember
Notionals, Protection Sold 277,010,000,000us-gaap_CreditDerivativeMaximumExposureUndiscounted
/ us-gaap_ExternalCreditRatingByGroupingAxis
= us-gaap_ExternalCreditRatingNonInvestmentGradeMember		 390,723,000,000us-gaap_CreditDerivativeMaximumExposureUndiscounted
/ us-gaap_ExternalCreditRatingByGroupingAxis
= us-gaap_ExternalCreditRatingNonInvestmentGradeMember
Credit default swaps and options    
Credit Derivative    
Fair value, Receivable 42,930,000,000us-gaap_CreditRiskDerivativeAssetsAtFairValue
/ us-gaap_CreditDerivativesByContractTypeAxis
= c_CreditDefaultSwapsAndOptionsMember		 40,233,000,000us-gaap_CreditRiskDerivativeAssetsAtFairValue
/ us-gaap_CreditDerivativesByContractTypeAxis
= c_CreditDefaultSwapsAndOptionsMember
Fair Value, Payable 42,201,000,000us-gaap_CreditRiskDerivativeLiabilitiesAtFairValue
/ us-gaap_CreditDerivativesByContractTypeAxis
= c_CreditDefaultSwapsAndOptionsMember		 39,930,000,000us-gaap_CreditRiskDerivativeLiabilitiesAtFairValue
/ us-gaap_CreditDerivativesByContractTypeAxis
= c_CreditDefaultSwapsAndOptionsMember
Notionals, Protection Purchased 1,094,199,000,000c_CreditDerivativesNotionalAmountPurchasedCreditProtection
/ us-gaap_CreditDerivativesByContractTypeAxis
= c_CreditDefaultSwapsAndOptionsMember		 1,201,716,000,000c_CreditDerivativesNotionalAmountPurchasedCreditProtection
/ us-gaap_CreditDerivativesByContractTypeAxis
= c_CreditDefaultSwapsAndOptionsMember
Notionals, Protection Sold 1,054,671,000,000us-gaap_CreditDerivativeMaximumExposureUndiscounted
/ us-gaap_CreditDerivativesByContractTypeAxis
= c_CreditDefaultSwapsAndOptionsMember		 1,141,864,000,000us-gaap_CreditDerivativeMaximumExposureUndiscounted
/ us-gaap_CreditDerivativesByContractTypeAxis
= c_CreditDefaultSwapsAndOptionsMember
Total return swaps and other    
Credit Derivative    
Fair value, Receivable 866,000,000us-gaap_CreditRiskDerivativeAssetsAtFairValue
/ us-gaap_CreditDerivativesByContractTypeAxis
= c_TotalReturnSwapAndOtherCreditDerivativesMember		 184,000,000us-gaap_CreditRiskDerivativeAssetsAtFairValue
/ us-gaap_CreditDerivativesByContractTypeAxis
= c_TotalReturnSwapAndOtherCreditDerivativesMember
Fair Value, Payable 1,784,000,000us-gaap_CreditRiskDerivativeLiabilitiesAtFairValue
/ us-gaap_CreditDerivativesByContractTypeAxis
= c_TotalReturnSwapAndOtherCreditDerivativesMember		 1,429,000,000us-gaap_CreditRiskDerivativeLiabilitiesAtFairValue
/ us-gaap_CreditDerivativesByContractTypeAxis
= c_TotalReturnSwapAndOtherCreditDerivativesMember
Notionals, Protection Purchased 22,188,000,000c_CreditDerivativesNotionalAmountPurchasedCreditProtection
/ us-gaap_CreditDerivativesByContractTypeAxis
= c_TotalReturnSwapAndOtherCreditDerivativesMember		 13,346,000,000c_CreditDerivativesNotionalAmountPurchasedCreditProtection
/ us-gaap_CreditDerivativesByContractTypeAxis
= c_TotalReturnSwapAndOtherCreditDerivativesMember
Notionals, Protection Sold 9,187,000,000us-gaap_CreditDerivativeMaximumExposureUndiscounted
/ us-gaap_CreditDerivativesByContractTypeAxis
= c_TotalReturnSwapAndOtherCreditDerivativesMember		 1,499,000,000us-gaap_CreditDerivativeMaximumExposureUndiscounted
/ us-gaap_CreditDerivativesByContractTypeAxis
= c_TotalReturnSwapAndOtherCreditDerivativesMember
Bank    
Credit Derivative    
Fair value, Receivable 24,828,000,000us-gaap_CreditRiskDerivativeAssetsAtFairValue
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis
= c_BankMember		 24,992,000,000us-gaap_CreditRiskDerivativeAssetsAtFairValue
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis
= c_BankMember
Fair Value, Payable 23,189,000,000us-gaap_CreditRiskDerivativeLiabilitiesAtFairValue
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis
= c_BankMember		 23,455,000,000us-gaap_CreditRiskDerivativeLiabilitiesAtFairValue
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis
= c_BankMember
Notionals, Protection Purchased 574,764,000,000c_CreditDerivativesNotionalAmountPurchasedCreditProtection
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis
= c_BankMember		 739,646,000,000c_CreditDerivativesNotionalAmountPurchasedCreditProtection
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis
= c_BankMember
Notionals, Protection Sold 604,700,000,000us-gaap_CreditDerivativeMaximumExposureUndiscounted
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis
= c_BankMember		 727,748,000,000us-gaap_CreditDerivativeMaximumExposureUndiscounted
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis
= c_BankMember
Broker-dealer    
Credit Derivative    
Fair value, Receivable 8,093,000,000us-gaap_CreditRiskDerivativeAssetsAtFairValue
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis
= c_BrokerDealerMember		 8,840,000,000us-gaap_CreditRiskDerivativeAssetsAtFairValue
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis
= c_BrokerDealerMember
Fair Value, Payable 9,309,000,000us-gaap_CreditRiskDerivativeLiabilitiesAtFairValue
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis
= c_BrokerDealerMember		 9,820,000,000us-gaap_CreditRiskDerivativeLiabilitiesAtFairValue
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis
= c_BrokerDealerMember
Notionals, Protection Purchased 204,542,000,000c_CreditDerivativesNotionalAmountPurchasedCreditProtection
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis
= c_BrokerDealerMember		 254,250,000,000c_CreditDerivativesNotionalAmountPurchasedCreditProtection
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis
= c_BrokerDealerMember
Notionals, Protection Sold 199,693,000,000us-gaap_CreditDerivativeMaximumExposureUndiscounted
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis
= c_BrokerDealerMember		 224,073,000,000us-gaap_CreditDerivativeMaximumExposureUndiscounted
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis
= c_BrokerDealerMember
Non-financial    
Credit Derivative    
Fair value, Receivable 91,000,000us-gaap_CreditRiskDerivativeAssetsAtFairValue
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis
= c_NonFinancialMember		 138,000,000us-gaap_CreditRiskDerivativeAssetsAtFairValue
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis
= c_NonFinancialMember
Fair Value, Payable 113,000,000us-gaap_CreditRiskDerivativeLiabilitiesAtFairValue
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis
= c_NonFinancialMember		 162,000,000us-gaap_CreditRiskDerivativeLiabilitiesAtFairValue
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis
= c_NonFinancialMember
Notionals, Protection Purchased 3,697,000,000c_CreditDerivativesNotionalAmountPurchasedCreditProtection
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis
= c_NonFinancialMember		 4,930,000,000c_CreditDerivativesNotionalAmountPurchasedCreditProtection
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis
= c_NonFinancialMember
Notionals, Protection Sold 1,595,000,000us-gaap_CreditDerivativeMaximumExposureUndiscounted
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis
= c_NonFinancialMember		 2,820,000,000us-gaap_CreditDerivativeMaximumExposureUndiscounted
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis
= c_NonFinancialMember
Insurance and other financial institutions    
Credit Derivative    
Fair value, Receivable 10,784,000,000us-gaap_CreditRiskDerivativeAssetsAtFairValue
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis
= c_InsuranceAndOtherFinancialInstitutionsMember		 6,447,000,000us-gaap_CreditRiskDerivativeAssetsAtFairValue
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis
= c_InsuranceAndOtherFinancialInstitutionsMember
Fair Value, Payable 11,374,000,000us-gaap_CreditRiskDerivativeLiabilitiesAtFairValue
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis
= c_InsuranceAndOtherFinancialInstitutionsMember		 7,922,000,000us-gaap_CreditRiskDerivativeLiabilitiesAtFairValue
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis
= c_InsuranceAndOtherFinancialInstitutionsMember
Notionals, Protection Purchased 333,384,000,000c_CreditDerivativesNotionalAmountPurchasedCreditProtection
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis
= c_InsuranceAndOtherFinancialInstitutionsMember		 216,236,000,000c_CreditDerivativesNotionalAmountPurchasedCreditProtection
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis
= c_InsuranceAndOtherFinancialInstitutionsMember
Notionals, Protection Sold $ 257,870,000,000us-gaap_CreditDerivativeMaximumExposureUndiscounted
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis
= c_InsuranceAndOtherFinancialInstitutionsMember		 $ 188,722,000,000us-gaap_CreditDerivativeMaximumExposureUndiscounted
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis
= c_InsuranceAndOtherFinancialInstitutionsMember