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BASIS OF PRESENTATION (Details) (USD $)
In Billions, except Share data in Millions, unless otherwise specified
0 Months Ended
May 14, 2014
Mar. 31, 2015
Dec. 31, 2014
May 13, 2014
Basis of Presentation        
Common stock, par value (in dollars per share)   $ 2.5us-gaap_CommonStockParOrStatedValuePerShare $ 2.5us-gaap_CommonStockParOrStatedValuePerShare  
International Lease Finance Corporation (ILFC)        
Basis of Presentation        
Percentage of common stock agreed to be sold 100.00%aig_DisposalGroupIncludingDiscontinuedOperationPercentageOfCommonStockAgreedToBeSold
/ us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis
= aig_InternationalLeaseFinanceCorporationMember
     
Consideration in cash $ 7.6us-gaap_ProceedsFromDivestitureOfBusinesses
/ us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis
= aig_InternationalLeaseFinanceCorporationMember
     
Number of shares received 97.6aig_NoncashOrPartNoncashDivestitureConsiderationAcquirerSharesReceived
/ us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis
= aig_InternationalLeaseFinanceCorporationMember
     
Aer Cap        
Basis of Presentation        
Closing price per share (in dollars per share)       $ 47.01us-gaap_SharePrice
/ dei_LegalEntityAxis
= aig_AerCapHoldingsNVMember
Minimum        
Basis of Presentation        
Number of Countries in which the entity operates   100us-gaap_NumberOfCountriesInWhichEntityOperates
/ us-gaap_RangeAxis
= us-gaap_MinimumMember