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INVESTMENTS (Details - Value of other securities measured at fair value based on election of the fair value option) (USD $)
In Millions, unless otherwise specified
Mar. 31, 2015
Dec. 31, 2014
TRADING SECURITIES    
Other Securities, Fair Value $ 20,113us-gaap_TradingSecurities $ 20,761us-gaap_TradingSecurities
Other Securities, Percent of Total 100.00%aig_TradingSecuritiesFairValuePercentage 100.00%aig_TradingSecuritiesFairValuePercentage
U.S. Government agency backed ABS    
TRADING SECURITIES    
Other Securities, Fair Value 825,000us-gaap_TradingSecurities
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= aig_USGovernmentAgencyAssetBackSecuritiesMember		 859,000us-gaap_TradingSecurities
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= aig_USGovernmentAgencyAssetBackSecuritiesMember
Fixed maturity securities    
TRADING SECURITIES    
Other Securities, Fair Value 19,013us-gaap_TradingSecurities
/ us-gaap_InvestmentTypeAxis
= us-gaap_FixedMaturitiesMember		 19,712us-gaap_TradingSecurities
/ us-gaap_InvestmentTypeAxis
= us-gaap_FixedMaturitiesMember
Other Securities, Percent of Total 95.00%aig_TradingSecuritiesFairValuePercentage
/ us-gaap_InvestmentTypeAxis
= us-gaap_FixedMaturitiesMember		 95.00%aig_TradingSecuritiesFairValuePercentage
/ us-gaap_InvestmentTypeAxis
= us-gaap_FixedMaturitiesMember
Fixed maturity securities | U.S. government and government sponsored entities    
TRADING SECURITIES    
Other Securities, Fair Value 5,483us-gaap_TradingSecurities
/ us-gaap_InvestmentTypeAxis
= us-gaap_FixedMaturitiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_USTreasuryAndGovernmentMember		 5,498us-gaap_TradingSecurities
/ us-gaap_InvestmentTypeAxis
= us-gaap_FixedMaturitiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_USTreasuryAndGovernmentMember
Other Securities, Percent of Total 27.00%aig_TradingSecuritiesFairValuePercentage
/ us-gaap_InvestmentTypeAxis
= us-gaap_FixedMaturitiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_USTreasuryAndGovernmentMember		 27.00%aig_TradingSecuritiesFairValuePercentage
/ us-gaap_InvestmentTypeAxis
= us-gaap_FixedMaturitiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_USTreasuryAndGovernmentMember
Fixed maturity securities | Obligations of states, municipalities and political subdivisions    
TRADING SECURITIES    
Other Securities, Fair Value 76us-gaap_TradingSecurities
/ us-gaap_InvestmentTypeAxis
= us-gaap_FixedMaturitiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_USStatesAndPoliticalSubdivisionsMember		 122us-gaap_TradingSecurities
/ us-gaap_InvestmentTypeAxis
= us-gaap_FixedMaturitiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_USStatesAndPoliticalSubdivisionsMember
Other Securities, Percent of Total 0.00%aig_TradingSecuritiesFairValuePercentage
/ us-gaap_InvestmentTypeAxis
= us-gaap_FixedMaturitiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_USStatesAndPoliticalSubdivisionsMember		 1.00%aig_TradingSecuritiesFairValuePercentage
/ us-gaap_InvestmentTypeAxis
= us-gaap_FixedMaturitiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_USStatesAndPoliticalSubdivisionsMember
Fixed maturity securities | Non-U.S. government    
TRADING SECURITIES    
Other Securities, Fair Value 2us-gaap_TradingSecurities
/ us-gaap_InvestmentTypeAxis
= us-gaap_FixedMaturitiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_ForeignGovernmentDebtSecuritiesMember		 2us-gaap_TradingSecurities
/ us-gaap_InvestmentTypeAxis
= us-gaap_FixedMaturitiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_ForeignGovernmentDebtSecuritiesMember
Other Securities, Percent of Total 0.00%aig_TradingSecuritiesFairValuePercentage
/ us-gaap_InvestmentTypeAxis
= us-gaap_FixedMaturitiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_ForeignGovernmentDebtSecuritiesMember		 0.00%aig_TradingSecuritiesFairValuePercentage
/ us-gaap_InvestmentTypeAxis
= us-gaap_FixedMaturitiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_ForeignGovernmentDebtSecuritiesMember
Fixed maturity securities | Corporate debt    
TRADING SECURITIES    
Other Securities, Fair Value 567us-gaap_TradingSecurities
/ us-gaap_InvestmentTypeAxis
= us-gaap_FixedMaturitiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_CorporateDebtSecuritiesMember		 719us-gaap_TradingSecurities
/ us-gaap_InvestmentTypeAxis
= us-gaap_FixedMaturitiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_CorporateDebtSecuritiesMember
Other Securities, Percent of Total 3.00%aig_TradingSecuritiesFairValuePercentage
/ us-gaap_InvestmentTypeAxis
= us-gaap_FixedMaturitiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_CorporateDebtSecuritiesMember		 3.00%aig_TradingSecuritiesFairValuePercentage
/ us-gaap_InvestmentTypeAxis
= us-gaap_FixedMaturitiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_CorporateDebtSecuritiesMember
Fixed maturity securities | Mortgage-backed, asset-backed and collateralized    
TRADING SECURITIES    
Other Securities, Fair Value 12,885us-gaap_TradingSecurities
/ us-gaap_InvestmentTypeAxis
= us-gaap_FixedMaturitiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_MortgageBackedSecuritiesMember		 13,371us-gaap_TradingSecurities
/ us-gaap_InvestmentTypeAxis
= us-gaap_FixedMaturitiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_MortgageBackedSecuritiesMember
Other Securities, Percent of Total 65.00%aig_TradingSecuritiesFairValuePercentage
/ us-gaap_InvestmentTypeAxis
= us-gaap_FixedMaturitiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_MortgageBackedSecuritiesMember		 64.00%aig_TradingSecuritiesFairValuePercentage
/ us-gaap_InvestmentTypeAxis
= us-gaap_FixedMaturitiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_MortgageBackedSecuritiesMember
Fixed maturity securities | Residential mortgage backed securities (RMBS)    
TRADING SECURITIES    
Other Securities, Fair Value 2,176us-gaap_TradingSecurities
/ us-gaap_InvestmentTypeAxis
= us-gaap_FixedMaturitiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_ResidentialMortgageBackedSecuritiesMember		 2,094us-gaap_TradingSecurities
/ us-gaap_InvestmentTypeAxis
= us-gaap_FixedMaturitiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_ResidentialMortgageBackedSecuritiesMember
Other Securities, Percent of Total 11.00%aig_TradingSecuritiesFairValuePercentage
/ us-gaap_InvestmentTypeAxis
= us-gaap_FixedMaturitiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_ResidentialMortgageBackedSecuritiesMember		 10.00%aig_TradingSecuritiesFairValuePercentage
/ us-gaap_InvestmentTypeAxis
= us-gaap_FixedMaturitiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_ResidentialMortgageBackedSecuritiesMember
Fixed maturity securities | Commercial mortgage-backed securities (CMBS)    
TRADING SECURITIES    
Other Securities, Fair Value 945us-gaap_TradingSecurities
/ us-gaap_InvestmentTypeAxis
= us-gaap_FixedMaturitiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_CommercialMortgageBackedSecuritiesMember		 1,077us-gaap_TradingSecurities
/ us-gaap_InvestmentTypeAxis
= us-gaap_FixedMaturitiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_CommercialMortgageBackedSecuritiesMember
Other Securities, Percent of Total 5.00%aig_TradingSecuritiesFairValuePercentage
/ us-gaap_InvestmentTypeAxis
= us-gaap_FixedMaturitiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_CommercialMortgageBackedSecuritiesMember		 5.00%aig_TradingSecuritiesFairValuePercentage
/ us-gaap_InvestmentTypeAxis
= us-gaap_FixedMaturitiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_CommercialMortgageBackedSecuritiesMember
Fixed maturity securities | Collateralized Debt Obligations/Asset-Backed Securities (CDO/ABS)    
TRADING SECURITIES    
Other Securities, Fair Value 9,764us-gaap_TradingSecurities
/ us-gaap_InvestmentTypeAxis
= us-gaap_FixedMaturitiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= aig_CollateralizedDebtObligationsAndAssetBackedSecuritiesSecuritizedLoansAndReceivablesMember		 10,200us-gaap_TradingSecurities
/ us-gaap_InvestmentTypeAxis
= us-gaap_FixedMaturitiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= aig_CollateralizedDebtObligationsAndAssetBackedSecuritiesSecuritizedLoansAndReceivablesMember
Other Securities, Percent of Total 49.00%aig_TradingSecuritiesFairValuePercentage
/ us-gaap_InvestmentTypeAxis
= us-gaap_FixedMaturitiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= aig_CollateralizedDebtObligationsAndAssetBackedSecuritiesSecuritizedLoansAndReceivablesMember		 49.00%aig_TradingSecuritiesFairValuePercentage
/ us-gaap_InvestmentTypeAxis
= us-gaap_FixedMaturitiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= aig_CollateralizedDebtObligationsAndAssetBackedSecuritiesSecuritizedLoansAndReceivablesMember
Fixed maturity securities | Other    
TRADING SECURITIES    
Other Securities, Fair Value 0us-gaap_TradingSecurities
/ us-gaap_InvestmentTypeAxis
= us-gaap_FixedMaturitiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= aig_FixedMaturitiesOtherMember		 0us-gaap_TradingSecurities
/ us-gaap_InvestmentTypeAxis
= us-gaap_FixedMaturitiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= aig_FixedMaturitiesOtherMember
Equity securities    
TRADING SECURITIES    
Other Securities, Fair Value $ 1,100us-gaap_TradingSecurities
/ us-gaap_InvestmentTypeAxis
= us-gaap_EquitySecuritiesMember		 $ 1,049us-gaap_TradingSecurities
/ us-gaap_InvestmentTypeAxis
= us-gaap_EquitySecuritiesMember
Other Securities, Percent of Total 5.00%aig_TradingSecuritiesFairValuePercentage
/ us-gaap_InvestmentTypeAxis
= us-gaap_EquitySecuritiesMember		 5.00%aig_TradingSecuritiesFairValuePercentage
/ us-gaap_InvestmentTypeAxis
= us-gaap_EquitySecuritiesMember