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INVESTMENTS (Details - Increase (decrease) in unrealized appreciation (depreciation)) (USD $)
In Millions, unless otherwise specified
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Schedule of Available-for-sale Securities [Line Items]    
Increase (decrease) in unrealized appreciation (depreciation) of investments $ 7,720us-gaap_AvailableForSaleSecuritiesChangeInNetUnrealizedHoldingGainLoss $ (13,605)us-gaap_AvailableForSaleSecuritiesChangeInNetUnrealizedHoldingGainLoss
Fixed maturity securities    
Schedule of Available-for-sale Securities [Line Items]    
Increase (decrease) in unrealized appreciation (depreciation) of investments 6,809us-gaap_AvailableForSaleSecuritiesChangeInNetUnrealizedHoldingGainLoss
/ us-gaap_InvestmentTypeAxis
= aig_BondsAvailableForSaleSecuritiesMember		 (14,066)us-gaap_AvailableForSaleSecuritiesChangeInNetUnrealizedHoldingGainLoss
/ us-gaap_InvestmentTypeAxis
= aig_BondsAvailableForSaleSecuritiesMember
Equity securities    
Schedule of Available-for-sale Securities [Line Items]    
Increase (decrease) in unrealized appreciation (depreciation) of investments 535us-gaap_AvailableForSaleSecuritiesChangeInNetUnrealizedHoldingGainLoss
/ us-gaap_InvestmentTypeAxis
= aig_EquityAvailableForSaleSecuritiesMember		 360us-gaap_AvailableForSaleSecuritiesChangeInNetUnrealizedHoldingGainLoss
/ us-gaap_InvestmentTypeAxis
= aig_EquityAvailableForSaleSecuritiesMember
Other investments    
Schedule of Available-for-sale Securities [Line Items]    
Increase (decrease) in unrealized appreciation (depreciation) of investments $ 376us-gaap_AvailableForSaleSecuritiesChangeInNetUnrealizedHoldingGainLoss
/ us-gaap_InvestmentTypeAxis
= aig_OtherInvestmentMember		 $ 101us-gaap_AvailableForSaleSecuritiesChangeInNetUnrealizedHoldingGainLoss
/ us-gaap_InvestmentTypeAxis
= aig_OtherInvestmentMember