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INVESTMENTS (Details - Amortized cost and fair value of fixed maturity securities available for sale by contractual maturity) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Schedule of Available-for-sale Securities [Line Items]    
Fixed Maturity Securities in a Loss Position Available for Sale , Amortized Cost, Total $ 245,237us-gaap_AvailableForSaleSecuritiesAmortizedCost $ 250,257us-gaap_AvailableForSaleSecuritiesAmortizedCost
Fixed Maturity Securities Available for Sale, Fair Value, Total 259,859us-gaap_AvailableForSaleSecuritiesDebtSecurities 258,274us-gaap_AvailableForSaleSecuritiesDebtSecurities
Fixed Maturity Securities Available for Sale in a Loss Position    
Schedule of Available-for-sale Securities [Line Items]    
Due in one year or less, Amortized Cost 637us-gaap_AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsAmortizedCostBasis
/ aig_GrossUnrealizedGainLossPositionAxis
= aig_UnrealizedLossPositionMember
 
Due after one year through five years, Amortized Cost 6,669us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveAmortizedCostBasis
/ aig_GrossUnrealizedGainLossPositionAxis
= aig_UnrealizedLossPositionMember
 
Due after five years through ten years, Amortized Cost 12,873us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenAmortizedCostBasis
/ aig_GrossUnrealizedGainLossPositionAxis
= aig_UnrealizedLossPositionMember
 
Due after ten years, Amortized Cost 10,255us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingAfterYearTenAmortizedCostBasis
/ aig_GrossUnrealizedGainLossPositionAxis
= aig_UnrealizedLossPositionMember
 
Mortgage-backed, asset-backed and collateralized, Amortized Cost 17,120us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateAmortizedCost
/ aig_GrossUnrealizedGainLossPositionAxis
= aig_UnrealizedLossPositionMember
 
Fixed Maturity Securities in a Loss Position Available for Sale , Amortized Cost, Total 47,554us-gaap_AvailableForSaleSecuritiesAmortizedCost
/ aig_GrossUnrealizedGainLossPositionAxis
= aig_UnrealizedLossPositionMember
 
Due in one year or less, Fair Value 620us-gaap_AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsFairValue
/ aig_GrossUnrealizedGainLossPositionAxis
= aig_UnrealizedLossPositionMember
 
Due after one year through five years, Fair Value 6,529us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveFairValue
/ aig_GrossUnrealizedGainLossPositionAxis
= aig_UnrealizedLossPositionMember
 
Due after five years through ten years, Fair Value 12,338us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenFairValue
/ aig_GrossUnrealizedGainLossPositionAxis
= aig_UnrealizedLossPositionMember
 
Due after ten years, Fair Value 9,607us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingAfterYearTenFairValue
/ aig_GrossUnrealizedGainLossPositionAxis
= aig_UnrealizedLossPositionMember
 
Mortgage-backed, asset-backed and collateralized, Fair Value 16,641us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateFairValue
/ aig_GrossUnrealizedGainLossPositionAxis
= aig_UnrealizedLossPositionMember
 
Fixed Maturity Securities Available for Sale, Fair Value, Total 45,735us-gaap_AvailableForSaleSecuritiesDebtSecurities
/ aig_GrossUnrealizedGainLossPositionAxis
= aig_UnrealizedLossPositionMember
 
Bonds available for sale    
Schedule of Available-for-sale Securities [Line Items]    
Due in one year or less, Amortized Cost 9,821us-gaap_AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsAmortizedCostBasis
/ us-gaap_InvestmentTypeAxis
= aig_BondsAvailableForSaleSecuritiesMember
 
Due after one year through five years, Amortized Cost 48,352us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveAmortizedCostBasis
/ us-gaap_InvestmentTypeAxis
= aig_BondsAvailableForSaleSecuritiesMember
 
Due after five years through ten years, Amortized Cost 62,685us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenAmortizedCostBasis
/ us-gaap_InvestmentTypeAxis
= aig_BondsAvailableForSaleSecuritiesMember
 
Due after ten years, Amortized Cost 63,168us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingAfterYearTenAmortizedCostBasis
/ us-gaap_InvestmentTypeAxis
= aig_BondsAvailableForSaleSecuritiesMember
 
Mortgage-backed, asset-backed and collateralized, Amortized Cost 59,281us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateAmortizedCost
/ us-gaap_InvestmentTypeAxis
= aig_BondsAvailableForSaleSecuritiesMember
 
Fixed Maturity Securities in a Loss Position Available for Sale , Amortized Cost, Total 243,307us-gaap_AvailableForSaleSecuritiesAmortizedCost
/ us-gaap_InvestmentTypeAxis
= aig_BondsAvailableForSaleSecuritiesMember
248,531us-gaap_AvailableForSaleSecuritiesAmortizedCost
/ us-gaap_InvestmentTypeAxis
= aig_BondsAvailableForSaleSecuritiesMember
Due in one year or less, Fair Value 9,975us-gaap_AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsFairValue
/ us-gaap_InvestmentTypeAxis
= aig_BondsAvailableForSaleSecuritiesMember
 
Due after one year through five years, Fair Value 50,873us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveFairValue
/ us-gaap_InvestmentTypeAxis
= aig_BondsAvailableForSaleSecuritiesMember
 
Due after five years through ten years, Fair Value 65,889us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenFairValue
/ us-gaap_InvestmentTypeAxis
= aig_BondsAvailableForSaleSecuritiesMember
 
Due after ten years, Fair Value 69,442us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingAfterYearTenFairValue
/ us-gaap_InvestmentTypeAxis
= aig_BondsAvailableForSaleSecuritiesMember
 
Mortgage-backed, asset-backed and collateralized, Fair Value 63,680us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateFairValue
/ us-gaap_InvestmentTypeAxis
= aig_BondsAvailableForSaleSecuritiesMember
 
Fixed Maturity Securities Available for Sale, Fair Value, Total $ 259,859us-gaap_AvailableForSaleSecuritiesDebtSecurities
/ us-gaap_InvestmentTypeAxis
= aig_BondsAvailableForSaleSecuritiesMember