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INVESTMENTS (Details - Amortized cost or cost and fair value of Available for sale securities) (USD $)
Dec. 31, 2014
Dec. 31, 2013
Reconciliation of amortized cost and fair value of available for sale securities and other invested assets carried at fair value    
Available for sale securities, Amortized Cost or Cost $ 245,237,000,000us-gaap_AvailableForSaleSecuritiesAmortizedCost $ 250,257,000,000us-gaap_AvailableForSaleSecuritiesAmortizedCost
Available for sale securities, Gross Unrealized Gains 20,890,000,000aig_AvailableForSaleSecuritiesGrossUnrealizedGainAccumulatedInInvestments 16,360,000,000aig_AvailableForSaleSecuritiesGrossUnrealizedGainAccumulatedInInvestments
Available for sale securities, Gross Unrealized Losses (1,873,000,000)aig_AvailableForSaleSecuritiesGrossUnrealizedLossAccumulatedInInvestments (4,687,000,000)aig_AvailableForSaleSecuritiesGrossUnrealizedLossAccumulatedInInvestments
Available for sale securities, Fair Value 264,254,000,000us-gaap_AvailableForSaleSecurities 261,930,000,000us-gaap_AvailableForSaleSecurities
AOCI- OTTI    
Reconciliation of amortized cost and fair value of available for sale securities and other invested assets carried at fair value    
Total, Other-Than-Temporary Impairments in AOCI 2,080,000,000us-gaap_AccumulatedOtherComprehensiveIncomeLossBeforeTax1
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedOtherThanTemporaryImpairmentMember		 1,916,000,000us-gaap_AccumulatedOtherComprehensiveIncomeLossBeforeTax1
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedOtherThanTemporaryImpairmentMember
Bonds available for sale    
Reconciliation of amortized cost and fair value of available for sale securities and other invested assets carried at fair value    
Available for sale securities, Amortized Cost or Cost 243,307,000,000us-gaap_AvailableForSaleSecuritiesAmortizedCost
/ us-gaap_InvestmentTypeAxis
= aig_BondsAvailableForSaleSecuritiesMember		 248,531,000,000us-gaap_AvailableForSaleSecuritiesAmortizedCost
/ us-gaap_InvestmentTypeAxis
= aig_BondsAvailableForSaleSecuritiesMember
Available for sale securities, Gross Unrealized Gains 18,371,000,000aig_AvailableForSaleSecuritiesGrossUnrealizedGainAccumulatedInInvestments
/ us-gaap_InvestmentTypeAxis
= aig_BondsAvailableForSaleSecuritiesMember		 14,391,000,000aig_AvailableForSaleSecuritiesGrossUnrealizedGainAccumulatedInInvestments
/ us-gaap_InvestmentTypeAxis
= aig_BondsAvailableForSaleSecuritiesMember
Available for sale securities, Gross Unrealized Losses (1,819,000,000)aig_AvailableForSaleSecuritiesGrossUnrealizedLossAccumulatedInInvestments
/ us-gaap_InvestmentTypeAxis
= aig_BondsAvailableForSaleSecuritiesMember		 (4,648,000,000)aig_AvailableForSaleSecuritiesGrossUnrealizedLossAccumulatedInInvestments
/ us-gaap_InvestmentTypeAxis
= aig_BondsAvailableForSaleSecuritiesMember
Available for sale securities, Fair Value 259,859,000,000us-gaap_AvailableForSaleSecurities
/ us-gaap_InvestmentTypeAxis
= aig_BondsAvailableForSaleSecuritiesMember		 258,274,000,000us-gaap_AvailableForSaleSecurities
/ us-gaap_InvestmentTypeAxis
= aig_BondsAvailableForSaleSecuritiesMember
Other details of available for sale securities    
Available for sale securities not rated or rated below investment grade 35,100,000,000aig_AvailableForSaleSecuritiesNotRatedOrRatedBelowInvestmentGrade
/ us-gaap_InvestmentTypeAxis
= aig_BondsAvailableForSaleSecuritiesMember		 32,600,000,000aig_AvailableForSaleSecuritiesNotRatedOrRatedBelowInvestmentGrade
/ us-gaap_InvestmentTypeAxis
= aig_BondsAvailableForSaleSecuritiesMember
Bonds available for sale | AOCI- OTTI    
Reconciliation of amortized cost and fair value of available for sale securities and other invested assets carried at fair value    
Total, Other-Than-Temporary Impairments in AOCI 2,080,000,000us-gaap_AccumulatedOtherComprehensiveIncomeLossBeforeTax1
/ us-gaap_InvestmentTypeAxis
= aig_BondsAvailableForSaleSecuritiesMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedOtherThanTemporaryImpairmentMember		 1,916,000,000us-gaap_AccumulatedOtherComprehensiveIncomeLossBeforeTax1
/ us-gaap_InvestmentTypeAxis
= aig_BondsAvailableForSaleSecuritiesMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedOtherThanTemporaryImpairmentMember
Bonds available for sale | U.S. government and government sponsored entities    
Reconciliation of amortized cost and fair value of available for sale securities and other invested assets carried at fair value    
Available for sale securities, Amortized Cost or Cost 2,806,000,000us-gaap_AvailableForSaleSecuritiesAmortizedCost
/ us-gaap_InvestmentTypeAxis
= aig_BondsAvailableForSaleSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_USTreasuryAndGovernmentMember		 3,084,000,000us-gaap_AvailableForSaleSecuritiesAmortizedCost
/ us-gaap_InvestmentTypeAxis
= aig_BondsAvailableForSaleSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_USTreasuryAndGovernmentMember
Available for sale securities, Gross Unrealized Gains 204,000,000aig_AvailableForSaleSecuritiesGrossUnrealizedGainAccumulatedInInvestments
/ us-gaap_InvestmentTypeAxis
= aig_BondsAvailableForSaleSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_USTreasuryAndGovernmentMember		 150,000,000aig_AvailableForSaleSecuritiesGrossUnrealizedGainAccumulatedInInvestments
/ us-gaap_InvestmentTypeAxis
= aig_BondsAvailableForSaleSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_USTreasuryAndGovernmentMember
Available for sale securities, Gross Unrealized Losses (18,000,000)aig_AvailableForSaleSecuritiesGrossUnrealizedLossAccumulatedInInvestments
/ us-gaap_InvestmentTypeAxis
= aig_BondsAvailableForSaleSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_USTreasuryAndGovernmentMember		 (39,000,000)aig_AvailableForSaleSecuritiesGrossUnrealizedLossAccumulatedInInvestments
/ us-gaap_InvestmentTypeAxis
= aig_BondsAvailableForSaleSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_USTreasuryAndGovernmentMember
Available for sale securities, Fair Value 2,992,000,000us-gaap_AvailableForSaleSecurities
/ us-gaap_InvestmentTypeAxis
= aig_BondsAvailableForSaleSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_USTreasuryAndGovernmentMember		 3,195,000,000us-gaap_AvailableForSaleSecurities
/ us-gaap_InvestmentTypeAxis
= aig_BondsAvailableForSaleSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_USTreasuryAndGovernmentMember
Bonds available for sale | U.S. government and government sponsored entities | AOCI- OTTI    
Reconciliation of amortized cost and fair value of available for sale securities and other invested assets carried at fair value    
Total, Other-Than-Temporary Impairments in AOCI 0us-gaap_AccumulatedOtherComprehensiveIncomeLossBeforeTax1
/ us-gaap_InvestmentTypeAxis
= aig_BondsAvailableForSaleSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_USTreasuryAndGovernmentMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedOtherThanTemporaryImpairmentMember		 0us-gaap_AccumulatedOtherComprehensiveIncomeLossBeforeTax1
/ us-gaap_InvestmentTypeAxis
= aig_BondsAvailableForSaleSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_USTreasuryAndGovernmentMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedOtherThanTemporaryImpairmentMember
Bonds available for sale | Obligations of states, municipalities and political subdivisions    
Reconciliation of amortized cost and fair value of available for sale securities and other invested assets carried at fair value    
Available for sale securities, Amortized Cost or Cost 25,979,000,000us-gaap_AvailableForSaleSecuritiesAmortizedCost
/ us-gaap_InvestmentTypeAxis
= aig_BondsAvailableForSaleSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_USStatesAndPoliticalSubdivisionsMember		 28,704,000,000us-gaap_AvailableForSaleSecuritiesAmortizedCost
/ us-gaap_InvestmentTypeAxis
= aig_BondsAvailableForSaleSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_USStatesAndPoliticalSubdivisionsMember
Available for sale securities, Gross Unrealized Gains 1,729,000,000aig_AvailableForSaleSecuritiesGrossUnrealizedGainAccumulatedInInvestments
/ us-gaap_InvestmentTypeAxis
= aig_BondsAvailableForSaleSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_USStatesAndPoliticalSubdivisionsMember		 1,122,000,000aig_AvailableForSaleSecuritiesGrossUnrealizedGainAccumulatedInInvestments
/ us-gaap_InvestmentTypeAxis
= aig_BondsAvailableForSaleSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_USStatesAndPoliticalSubdivisionsMember
Available for sale securities, Gross Unrealized Losses (49,000,000)aig_AvailableForSaleSecuritiesGrossUnrealizedLossAccumulatedInInvestments
/ us-gaap_InvestmentTypeAxis
= aig_BondsAvailableForSaleSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_USStatesAndPoliticalSubdivisionsMember		 (446,000,000)aig_AvailableForSaleSecuritiesGrossUnrealizedLossAccumulatedInInvestments
/ us-gaap_InvestmentTypeAxis
= aig_BondsAvailableForSaleSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_USStatesAndPoliticalSubdivisionsMember
Available for sale securities, Fair Value 27,659,000,000us-gaap_AvailableForSaleSecurities
/ us-gaap_InvestmentTypeAxis
= aig_BondsAvailableForSaleSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_USStatesAndPoliticalSubdivisionsMember		 29,380,000,000us-gaap_AvailableForSaleSecurities
/ us-gaap_InvestmentTypeAxis
= aig_BondsAvailableForSaleSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_USStatesAndPoliticalSubdivisionsMember
Bonds available for sale | Obligations of states, municipalities and political subdivisions | AOCI- OTTI    
Reconciliation of amortized cost and fair value of available for sale securities and other invested assets carried at fair value    
Total, Other-Than-Temporary Impairments in AOCI (13,000,000)us-gaap_AccumulatedOtherComprehensiveIncomeLossBeforeTax1
/ us-gaap_InvestmentTypeAxis
= aig_BondsAvailableForSaleSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_USStatesAndPoliticalSubdivisionsMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedOtherThanTemporaryImpairmentMember		 (15,000,000)us-gaap_AccumulatedOtherComprehensiveIncomeLossBeforeTax1
/ us-gaap_InvestmentTypeAxis
= aig_BondsAvailableForSaleSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_USStatesAndPoliticalSubdivisionsMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedOtherThanTemporaryImpairmentMember
Bonds available for sale | Non-U.S. government    
Reconciliation of amortized cost and fair value of available for sale securities and other invested assets carried at fair value    
Available for sale securities, Amortized Cost or Cost 20,280,000,000us-gaap_AvailableForSaleSecuritiesAmortizedCost
/ us-gaap_InvestmentTypeAxis
= aig_BondsAvailableForSaleSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_ForeignGovernmentDebtSecuritiesMember		 22,045,000,000us-gaap_AvailableForSaleSecuritiesAmortizedCost
/ us-gaap_InvestmentTypeAxis
= aig_BondsAvailableForSaleSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_ForeignGovernmentDebtSecuritiesMember
Available for sale securities, Gross Unrealized Gains 966,000,000aig_AvailableForSaleSecuritiesGrossUnrealizedGainAccumulatedInInvestments
/ us-gaap_InvestmentTypeAxis
= aig_BondsAvailableForSaleSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_ForeignGovernmentDebtSecuritiesMember		 822,000,000aig_AvailableForSaleSecuritiesGrossUnrealizedGainAccumulatedInInvestments
/ us-gaap_InvestmentTypeAxis
= aig_BondsAvailableForSaleSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_ForeignGovernmentDebtSecuritiesMember
Available for sale securities, Gross Unrealized Losses (151,000,000)aig_AvailableForSaleSecuritiesGrossUnrealizedLossAccumulatedInInvestments
/ us-gaap_InvestmentTypeAxis
= aig_BondsAvailableForSaleSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_ForeignGovernmentDebtSecuritiesMember		 (358,000,000)aig_AvailableForSaleSecuritiesGrossUnrealizedLossAccumulatedInInvestments
/ us-gaap_InvestmentTypeAxis
= aig_BondsAvailableForSaleSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_ForeignGovernmentDebtSecuritiesMember
Available for sale securities, Fair Value 21,095,000,000us-gaap_AvailableForSaleSecurities
/ us-gaap_InvestmentTypeAxis
= aig_BondsAvailableForSaleSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_ForeignGovernmentDebtSecuritiesMember		 22,509,000,000us-gaap_AvailableForSaleSecurities
/ us-gaap_InvestmentTypeAxis
= aig_BondsAvailableForSaleSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_ForeignGovernmentDebtSecuritiesMember
Bonds available for sale | Non-U.S. government | AOCI- OTTI    
Reconciliation of amortized cost and fair value of available for sale securities and other invested assets carried at fair value    
Total, Other-Than-Temporary Impairments in AOCI 0us-gaap_AccumulatedOtherComprehensiveIncomeLossBeforeTax1
/ us-gaap_InvestmentTypeAxis
= aig_BondsAvailableForSaleSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_ForeignGovernmentDebtSecuritiesMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedOtherThanTemporaryImpairmentMember		 0us-gaap_AccumulatedOtherComprehensiveIncomeLossBeforeTax1
/ us-gaap_InvestmentTypeAxis
= aig_BondsAvailableForSaleSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_ForeignGovernmentDebtSecuritiesMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedOtherThanTemporaryImpairmentMember
Bonds available for sale | Corporate debt    
Reconciliation of amortized cost and fair value of available for sale securities and other invested assets carried at fair value    
Available for sale securities, Amortized Cost or Cost 134,961,000,000us-gaap_AvailableForSaleSecuritiesAmortizedCost
/ us-gaap_InvestmentTypeAxis
= aig_BondsAvailableForSaleSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_CorporateDebtSecuritiesMember		 139,461,000,000us-gaap_AvailableForSaleSecuritiesAmortizedCost
/ us-gaap_InvestmentTypeAxis
= aig_BondsAvailableForSaleSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_CorporateDebtSecuritiesMember
Available for sale securities, Gross Unrealized Gains 10,594,000,000aig_AvailableForSaleSecuritiesGrossUnrealizedGainAccumulatedInInvestments
/ us-gaap_InvestmentTypeAxis
= aig_BondsAvailableForSaleSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_CorporateDebtSecuritiesMember		 7,989,000,000aig_AvailableForSaleSecuritiesGrossUnrealizedGainAccumulatedInInvestments
/ us-gaap_InvestmentTypeAxis
= aig_BondsAvailableForSaleSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_CorporateDebtSecuritiesMember
Available for sale securities, Gross Unrealized Losses (1,122,000,000)aig_AvailableForSaleSecuritiesGrossUnrealizedLossAccumulatedInInvestments
/ us-gaap_InvestmentTypeAxis
= aig_BondsAvailableForSaleSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_CorporateDebtSecuritiesMember		 (2,898,000,000)aig_AvailableForSaleSecuritiesGrossUnrealizedLossAccumulatedInInvestments
/ us-gaap_InvestmentTypeAxis
= aig_BondsAvailableForSaleSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_CorporateDebtSecuritiesMember
Available for sale securities, Fair Value 144,433,000,000us-gaap_AvailableForSaleSecurities
/ us-gaap_InvestmentTypeAxis
= aig_BondsAvailableForSaleSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_CorporateDebtSecuritiesMember		 144,552,000,000us-gaap_AvailableForSaleSecurities
/ us-gaap_InvestmentTypeAxis
= aig_BondsAvailableForSaleSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_CorporateDebtSecuritiesMember
Bonds available for sale | Corporate debt | AOCI- OTTI    
Reconciliation of amortized cost and fair value of available for sale securities and other invested assets carried at fair value    
Total, Other-Than-Temporary Impairments in AOCI 64,000,000us-gaap_AccumulatedOtherComprehensiveIncomeLossBeforeTax1
/ us-gaap_InvestmentTypeAxis
= aig_BondsAvailableForSaleSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_CorporateDebtSecuritiesMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedOtherThanTemporaryImpairmentMember		 74,000,000us-gaap_AccumulatedOtherComprehensiveIncomeLossBeforeTax1
/ us-gaap_InvestmentTypeAxis
= aig_BondsAvailableForSaleSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_CorporateDebtSecuritiesMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedOtherThanTemporaryImpairmentMember
Bonds available for sale | Mortgage-backed, asset-backed and collateralized    
Reconciliation of amortized cost and fair value of available for sale securities and other invested assets carried at fair value    
Available for sale securities, Amortized Cost or Cost 59,281,000,000us-gaap_AvailableForSaleSecuritiesAmortizedCost
/ us-gaap_InvestmentTypeAxis
= aig_BondsAvailableForSaleSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_MortgageBackedSecuritiesMember		 55,237,000,000us-gaap_AvailableForSaleSecuritiesAmortizedCost
/ us-gaap_InvestmentTypeAxis
= aig_BondsAvailableForSaleSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_MortgageBackedSecuritiesMember
Available for sale securities, Gross Unrealized Gains 4,878,000,000aig_AvailableForSaleSecuritiesGrossUnrealizedGainAccumulatedInInvestments
/ us-gaap_InvestmentTypeAxis
= aig_BondsAvailableForSaleSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_MortgageBackedSecuritiesMember		 4,308,000,000aig_AvailableForSaleSecuritiesGrossUnrealizedGainAccumulatedInInvestments
/ us-gaap_InvestmentTypeAxis
= aig_BondsAvailableForSaleSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_MortgageBackedSecuritiesMember
Available for sale securities, Gross Unrealized Losses (479,000,000)aig_AvailableForSaleSecuritiesGrossUnrealizedLossAccumulatedInInvestments
/ us-gaap_InvestmentTypeAxis
= aig_BondsAvailableForSaleSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_MortgageBackedSecuritiesMember		 (907,000,000)aig_AvailableForSaleSecuritiesGrossUnrealizedLossAccumulatedInInvestments
/ us-gaap_InvestmentTypeAxis
= aig_BondsAvailableForSaleSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_MortgageBackedSecuritiesMember
Available for sale securities, Fair Value 63,680,000,000us-gaap_AvailableForSaleSecurities
/ us-gaap_InvestmentTypeAxis
= aig_BondsAvailableForSaleSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_MortgageBackedSecuritiesMember		 58,638,000,000us-gaap_AvailableForSaleSecurities
/ us-gaap_InvestmentTypeAxis
= aig_BondsAvailableForSaleSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_MortgageBackedSecuritiesMember
Bonds available for sale | Mortgage-backed, asset-backed and collateralized | AOCI- OTTI    
Reconciliation of amortized cost and fair value of available for sale securities and other invested assets carried at fair value    
Total, Other-Than-Temporary Impairments in AOCI 2,029,000,000us-gaap_AccumulatedOtherComprehensiveIncomeLossBeforeTax1
/ us-gaap_InvestmentTypeAxis
= aig_BondsAvailableForSaleSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_MortgageBackedSecuritiesMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedOtherThanTemporaryImpairmentMember		 1,857,000,000us-gaap_AccumulatedOtherComprehensiveIncomeLossBeforeTax1
/ us-gaap_InvestmentTypeAxis
= aig_BondsAvailableForSaleSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_MortgageBackedSecuritiesMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedOtherThanTemporaryImpairmentMember
Bonds available for sale | Residential mortgage-backed securities (RMBS)    
Reconciliation of amortized cost and fair value of available for sale securities and other invested assets carried at fair value    
Available for sale securities, Amortized Cost or Cost 34,377,000,000us-gaap_AvailableForSaleSecuritiesAmortizedCost
/ us-gaap_InvestmentTypeAxis
= aig_BondsAvailableForSaleSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_ResidentialMortgageBackedSecuritiesMember		 33,520,000,000us-gaap_AvailableForSaleSecuritiesAmortizedCost
/ us-gaap_InvestmentTypeAxis
= aig_BondsAvailableForSaleSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_ResidentialMortgageBackedSecuritiesMember
Available for sale securities, Gross Unrealized Gains 3,435,000,000aig_AvailableForSaleSecuritiesGrossUnrealizedGainAccumulatedInInvestments
/ us-gaap_InvestmentTypeAxis
= aig_BondsAvailableForSaleSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_ResidentialMortgageBackedSecuritiesMember		 3,101,000,000aig_AvailableForSaleSecuritiesGrossUnrealizedGainAccumulatedInInvestments
/ us-gaap_InvestmentTypeAxis
= aig_BondsAvailableForSaleSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_ResidentialMortgageBackedSecuritiesMember
Available for sale securities, Gross Unrealized Losses (292,000,000)aig_AvailableForSaleSecuritiesGrossUnrealizedLossAccumulatedInInvestments
/ us-gaap_InvestmentTypeAxis
= aig_BondsAvailableForSaleSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_ResidentialMortgageBackedSecuritiesMember		 (473,000,000)aig_AvailableForSaleSecuritiesGrossUnrealizedLossAccumulatedInInvestments
/ us-gaap_InvestmentTypeAxis
= aig_BondsAvailableForSaleSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_ResidentialMortgageBackedSecuritiesMember
Available for sale securities, Fair Value 37,520,000,000us-gaap_AvailableForSaleSecurities
/ us-gaap_InvestmentTypeAxis
= aig_BondsAvailableForSaleSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_ResidentialMortgageBackedSecuritiesMember		 36,148,000,000us-gaap_AvailableForSaleSecurities
/ us-gaap_InvestmentTypeAxis
= aig_BondsAvailableForSaleSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_ResidentialMortgageBackedSecuritiesMember
Bonds available for sale | Residential mortgage-backed securities (RMBS) | AOCI- OTTI    
Reconciliation of amortized cost and fair value of available for sale securities and other invested assets carried at fair value    
Total, Other-Than-Temporary Impairments in AOCI 1,767,000,000us-gaap_AccumulatedOtherComprehensiveIncomeLossBeforeTax1
/ us-gaap_InvestmentTypeAxis
= aig_BondsAvailableForSaleSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_ResidentialMortgageBackedSecuritiesMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedOtherThanTemporaryImpairmentMember		 1,670,000,000us-gaap_AccumulatedOtherComprehensiveIncomeLossBeforeTax1
/ us-gaap_InvestmentTypeAxis
= aig_BondsAvailableForSaleSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_ResidentialMortgageBackedSecuritiesMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedOtherThanTemporaryImpairmentMember
Bonds available for sale | Commercial mortgage-backed securities (CMBS)    
Reconciliation of amortized cost and fair value of available for sale securities and other invested assets carried at fair value    
Available for sale securities, Amortized Cost or Cost 12,129,000,000us-gaap_AvailableForSaleSecuritiesAmortizedCost
/ us-gaap_InvestmentTypeAxis
= aig_BondsAvailableForSaleSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_CommercialMortgageBackedSecuritiesMember		 11,216,000,000us-gaap_AvailableForSaleSecuritiesAmortizedCost
/ us-gaap_InvestmentTypeAxis
= aig_BondsAvailableForSaleSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_CommercialMortgageBackedSecuritiesMember
Available for sale securities, Gross Unrealized Gains 815,000,000aig_AvailableForSaleSecuritiesGrossUnrealizedGainAccumulatedInInvestments
/ us-gaap_InvestmentTypeAxis
= aig_BondsAvailableForSaleSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_CommercialMortgageBackedSecuritiesMember		 558,000,000aig_AvailableForSaleSecuritiesGrossUnrealizedGainAccumulatedInInvestments
/ us-gaap_InvestmentTypeAxis
= aig_BondsAvailableForSaleSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_CommercialMortgageBackedSecuritiesMember
Available for sale securities, Gross Unrealized Losses (59,000,000)aig_AvailableForSaleSecuritiesGrossUnrealizedLossAccumulatedInInvestments
/ us-gaap_InvestmentTypeAxis
= aig_BondsAvailableForSaleSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_CommercialMortgageBackedSecuritiesMember		 (292,000,000)aig_AvailableForSaleSecuritiesGrossUnrealizedLossAccumulatedInInvestments
/ us-gaap_InvestmentTypeAxis
= aig_BondsAvailableForSaleSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_CommercialMortgageBackedSecuritiesMember
Available for sale securities, Fair Value 12,885,000,000us-gaap_AvailableForSaleSecurities
/ us-gaap_InvestmentTypeAxis
= aig_BondsAvailableForSaleSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_CommercialMortgageBackedSecuritiesMember		 11,482,000,000us-gaap_AvailableForSaleSecurities
/ us-gaap_InvestmentTypeAxis
= aig_BondsAvailableForSaleSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_CommercialMortgageBackedSecuritiesMember
Bonds available for sale | Commercial mortgage-backed securities (CMBS) | AOCI- OTTI    
Reconciliation of amortized cost and fair value of available for sale securities and other invested assets carried at fair value    
Total, Other-Than-Temporary Impairments in AOCI 215,000,000us-gaap_AccumulatedOtherComprehensiveIncomeLossBeforeTax1
/ us-gaap_InvestmentTypeAxis
= aig_BondsAvailableForSaleSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_CommercialMortgageBackedSecuritiesMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedOtherThanTemporaryImpairmentMember		 125,000,000us-gaap_AccumulatedOtherComprehensiveIncomeLossBeforeTax1
/ us-gaap_InvestmentTypeAxis
= aig_BondsAvailableForSaleSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_CommercialMortgageBackedSecuritiesMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedOtherThanTemporaryImpairmentMember
Bonds available for sale | Collateralized Debt Obligations/Asset-Backed Securities (CDO/ABS)    
Reconciliation of amortized cost and fair value of available for sale securities and other invested assets carried at fair value    
Available for sale securities, Amortized Cost or Cost 12,775,000,000us-gaap_AvailableForSaleSecuritiesAmortizedCost
/ us-gaap_InvestmentTypeAxis
= aig_BondsAvailableForSaleSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= aig_CollateralizedDebtObligationsAndAssetBackedSecuritiesSecuritizedLoansAndReceivablesMember		 10,501,000,000us-gaap_AvailableForSaleSecuritiesAmortizedCost
/ us-gaap_InvestmentTypeAxis
= aig_BondsAvailableForSaleSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= aig_CollateralizedDebtObligationsAndAssetBackedSecuritiesSecuritizedLoansAndReceivablesMember
Available for sale securities, Gross Unrealized Gains 628,000,000aig_AvailableForSaleSecuritiesGrossUnrealizedGainAccumulatedInInvestments
/ us-gaap_InvestmentTypeAxis
= aig_BondsAvailableForSaleSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= aig_CollateralizedDebtObligationsAndAssetBackedSecuritiesSecuritizedLoansAndReceivablesMember		 649,000,000aig_AvailableForSaleSecuritiesGrossUnrealizedGainAccumulatedInInvestments
/ us-gaap_InvestmentTypeAxis
= aig_BondsAvailableForSaleSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= aig_CollateralizedDebtObligationsAndAssetBackedSecuritiesSecuritizedLoansAndReceivablesMember
Available for sale securities, Gross Unrealized Losses (128,000,000)aig_AvailableForSaleSecuritiesGrossUnrealizedLossAccumulatedInInvestments
/ us-gaap_InvestmentTypeAxis
= aig_BondsAvailableForSaleSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= aig_CollateralizedDebtObligationsAndAssetBackedSecuritiesSecuritizedLoansAndReceivablesMember		 (142,000,000)aig_AvailableForSaleSecuritiesGrossUnrealizedLossAccumulatedInInvestments
/ us-gaap_InvestmentTypeAxis
= aig_BondsAvailableForSaleSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= aig_CollateralizedDebtObligationsAndAssetBackedSecuritiesSecuritizedLoansAndReceivablesMember
Available for sale securities, Fair Value 13,275,000,000us-gaap_AvailableForSaleSecurities
/ us-gaap_InvestmentTypeAxis
= aig_BondsAvailableForSaleSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= aig_CollateralizedDebtObligationsAndAssetBackedSecuritiesSecuritizedLoansAndReceivablesMember		 11,008,000,000us-gaap_AvailableForSaleSecurities
/ us-gaap_InvestmentTypeAxis
= aig_BondsAvailableForSaleSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= aig_CollateralizedDebtObligationsAndAssetBackedSecuritiesSecuritizedLoansAndReceivablesMember
Bonds available for sale | Collateralized Debt Obligations/Asset-Backed Securities (CDO/ABS) | AOCI- OTTI    
Reconciliation of amortized cost and fair value of available for sale securities and other invested assets carried at fair value    
Total, Other-Than-Temporary Impairments in AOCI 47,000,000us-gaap_AccumulatedOtherComprehensiveIncomeLossBeforeTax1
/ us-gaap_InvestmentTypeAxis
= aig_BondsAvailableForSaleSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= aig_CollateralizedDebtObligationsAndAssetBackedSecuritiesSecuritizedLoansAndReceivablesMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedOtherThanTemporaryImpairmentMember		 62,000,000us-gaap_AccumulatedOtherComprehensiveIncomeLossBeforeTax1
/ us-gaap_InvestmentTypeAxis
= aig_BondsAvailableForSaleSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= aig_CollateralizedDebtObligationsAndAssetBackedSecuritiesSecuritizedLoansAndReceivablesMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedOtherThanTemporaryImpairmentMember
Equity securities available for sale    
Reconciliation of amortized cost and fair value of available for sale securities and other invested assets carried at fair value    
Available for sale securities, Amortized Cost or Cost 1,930,000,000us-gaap_AvailableForSaleSecuritiesAmortizedCost
/ us-gaap_InvestmentTypeAxis
= aig_EquityAvailableForSaleSecuritiesMember		 1,726,000,000us-gaap_AvailableForSaleSecuritiesAmortizedCost
/ us-gaap_InvestmentTypeAxis
= aig_EquityAvailableForSaleSecuritiesMember
Available for sale securities, Gross Unrealized Gains 2,519,000,000aig_AvailableForSaleSecuritiesGrossUnrealizedGainAccumulatedInInvestments
/ us-gaap_InvestmentTypeAxis
= aig_EquityAvailableForSaleSecuritiesMember		 1,969,000,000aig_AvailableForSaleSecuritiesGrossUnrealizedGainAccumulatedInInvestments
/ us-gaap_InvestmentTypeAxis
= aig_EquityAvailableForSaleSecuritiesMember
Available for sale securities, Gross Unrealized Losses (54,000,000)aig_AvailableForSaleSecuritiesGrossUnrealizedLossAccumulatedInInvestments
/ us-gaap_InvestmentTypeAxis
= aig_EquityAvailableForSaleSecuritiesMember		 (39,000,000)aig_AvailableForSaleSecuritiesGrossUnrealizedLossAccumulatedInInvestments
/ us-gaap_InvestmentTypeAxis
= aig_EquityAvailableForSaleSecuritiesMember
Available for sale securities, Fair Value 4,395,000,000us-gaap_AvailableForSaleSecurities
/ us-gaap_InvestmentTypeAxis
= aig_EquityAvailableForSaleSecuritiesMember		 3,656,000,000us-gaap_AvailableForSaleSecurities
/ us-gaap_InvestmentTypeAxis
= aig_EquityAvailableForSaleSecuritiesMember
Equity securities available for sale | Common Stock    
Reconciliation of amortized cost and fair value of available for sale securities and other invested assets carried at fair value    
Available for sale securities, Amortized Cost or Cost 1,185,000,000us-gaap_AvailableForSaleSecuritiesAmortizedCost
/ us-gaap_InvestmentTypeAxis
= aig_EquityAvailableForSaleSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_CommonStockMember		 1,280,000,000us-gaap_AvailableForSaleSecuritiesAmortizedCost
/ us-gaap_InvestmentTypeAxis
= aig_EquityAvailableForSaleSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_CommonStockMember
Available for sale securities, Gross Unrealized Gains 2,461,000,000aig_AvailableForSaleSecuritiesGrossUnrealizedGainAccumulatedInInvestments
/ us-gaap_InvestmentTypeAxis
= aig_EquityAvailableForSaleSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_CommonStockMember		 1,953,000,000aig_AvailableForSaleSecuritiesGrossUnrealizedGainAccumulatedInInvestments
/ us-gaap_InvestmentTypeAxis
= aig_EquityAvailableForSaleSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_CommonStockMember
Available for sale securities, Gross Unrealized Losses (17,000,000)aig_AvailableForSaleSecuritiesGrossUnrealizedLossAccumulatedInInvestments
/ us-gaap_InvestmentTypeAxis
= aig_EquityAvailableForSaleSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_CommonStockMember		 (14,000,000)aig_AvailableForSaleSecuritiesGrossUnrealizedLossAccumulatedInInvestments
/ us-gaap_InvestmentTypeAxis
= aig_EquityAvailableForSaleSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_CommonStockMember
Available for sale securities, Fair Value 3,629,000,000us-gaap_AvailableForSaleSecurities
/ us-gaap_InvestmentTypeAxis
= aig_EquityAvailableForSaleSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_CommonStockMember		 3,219,000,000us-gaap_AvailableForSaleSecurities
/ us-gaap_InvestmentTypeAxis
= aig_EquityAvailableForSaleSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_CommonStockMember
Equity securities available for sale | Preferred Stock    
Reconciliation of amortized cost and fair value of available for sale securities and other invested assets carried at fair value    
Available for sale securities, Amortized Cost or Cost 21,000,000us-gaap_AvailableForSaleSecuritiesAmortizedCost
/ us-gaap_InvestmentTypeAxis
= aig_EquityAvailableForSaleSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_PreferredStockMember		 24,000,000us-gaap_AvailableForSaleSecuritiesAmortizedCost
/ us-gaap_InvestmentTypeAxis
= aig_EquityAvailableForSaleSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_PreferredStockMember
Available for sale securities, Gross Unrealized Gains 4,000,000aig_AvailableForSaleSecuritiesGrossUnrealizedGainAccumulatedInInvestments
/ us-gaap_InvestmentTypeAxis
= aig_EquityAvailableForSaleSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_PreferredStockMember		 4,000,000aig_AvailableForSaleSecuritiesGrossUnrealizedGainAccumulatedInInvestments
/ us-gaap_InvestmentTypeAxis
= aig_EquityAvailableForSaleSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_PreferredStockMember
Available for sale securities, Gross Unrealized Losses 0aig_AvailableForSaleSecuritiesGrossUnrealizedLossAccumulatedInInvestments
/ us-gaap_InvestmentTypeAxis
= aig_EquityAvailableForSaleSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_PreferredStockMember		 (1,000,000)aig_AvailableForSaleSecuritiesGrossUnrealizedLossAccumulatedInInvestments
/ us-gaap_InvestmentTypeAxis
= aig_EquityAvailableForSaleSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_PreferredStockMember
Available for sale securities, Fair Value 25,000,000us-gaap_AvailableForSaleSecurities
/ us-gaap_InvestmentTypeAxis
= aig_EquityAvailableForSaleSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_PreferredStockMember		 27,000,000us-gaap_AvailableForSaleSecurities
/ us-gaap_InvestmentTypeAxis
= aig_EquityAvailableForSaleSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_PreferredStockMember
Equity securities available for sale | Mutual Funds    
Reconciliation of amortized cost and fair value of available for sale securities and other invested assets carried at fair value    
Available for sale securities, Amortized Cost or Cost 724,000,000us-gaap_AvailableForSaleSecuritiesAmortizedCost
/ us-gaap_InvestmentTypeAxis
= aig_EquityAvailableForSaleSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_EquityFundsMember		 422,000,000us-gaap_AvailableForSaleSecuritiesAmortizedCost
/ us-gaap_InvestmentTypeAxis
= aig_EquityAvailableForSaleSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_EquityFundsMember
Available for sale securities, Gross Unrealized Gains 54,000,000aig_AvailableForSaleSecuritiesGrossUnrealizedGainAccumulatedInInvestments
/ us-gaap_InvestmentTypeAxis
= aig_EquityAvailableForSaleSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_EquityFundsMember		 12,000,000aig_AvailableForSaleSecuritiesGrossUnrealizedGainAccumulatedInInvestments
/ us-gaap_InvestmentTypeAxis
= aig_EquityAvailableForSaleSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_EquityFundsMember
Available for sale securities, Gross Unrealized Losses (37,000,000)aig_AvailableForSaleSecuritiesGrossUnrealizedLossAccumulatedInInvestments
/ us-gaap_InvestmentTypeAxis
= aig_EquityAvailableForSaleSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_EquityFundsMember		 (24,000,000)aig_AvailableForSaleSecuritiesGrossUnrealizedLossAccumulatedInInvestments
/ us-gaap_InvestmentTypeAxis
= aig_EquityAvailableForSaleSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_EquityFundsMember
Available for sale securities, Fair Value $ 741,000,000us-gaap_AvailableForSaleSecurities
/ us-gaap_InvestmentTypeAxis
= aig_EquityAvailableForSaleSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_EquityFundsMember		 $ 410,000,000us-gaap_AvailableForSaleSecurities
/ us-gaap_InvestmentTypeAxis
= aig_EquityAvailableForSaleSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_EquityFundsMember