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LENDING ACTIVITIES (Details - Composition of Mortgage and other loans receivable) (USD $)
In Millions, unless otherwise specified
 3 Months Ended 12 Months Ended
Mar. 31, 2015
Dec. 31, 2014
Mar. 31, 2014
Dec. 31, 2013
Composition of Mortgages and other loans receivable        
Total mortgage and other loans receivable 25,563aig_FinanceReceivableGross 25,261aig_FinanceReceivableGross    
Allowance for losses (250)us-gaap_LoansAndLeasesReceivableAllowance (271)us-gaap_LoansAndLeasesReceivableAllowance (299)us-gaap_LoansAndLeasesReceivableAllowance (312)us-gaap_LoansAndLeasesReceivableAllowance
Mortgage and other loans receivable, net 25,313us-gaap_LoansAndLeasesReceivableNetReportedAmount 24,990us-gaap_LoansAndLeasesReceivableNetReportedAmount    
Commercial mortgages        
Composition of Mortgages and other loans receivable        
Total mortgage and other loans receivable 19,172aig_FinanceReceivableGross
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= aig_CommercialMortgageMember		 18,909aig_FinanceReceivableGross
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= aig_CommercialMortgageMember		    
Allowance for losses (143)us-gaap_LoansAndLeasesReceivableAllowance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= aig_CommercialMortgageMember		 (159)us-gaap_LoansAndLeasesReceivableAllowance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= aig_CommercialMortgageMember		 (200)us-gaap_LoansAndLeasesReceivableAllowance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= aig_CommercialMortgageMember		 (201)us-gaap_LoansAndLeasesReceivableAllowance
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= aig_CommercialMortgageMember
Commercial mortgages | California        
Composition of Mortgages and other loans receivable        
Percentage of mortgage loans in geographic area 14.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= aig_CommercialMortgageMember
/ us-gaap_ConcentrationRiskByTypeAxis
= stpr_CA		 14.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= aig_CommercialMortgageMember
/ us-gaap_ConcentrationRiskByTypeAxis
= stpr_CA		    
Commercial mortgages | New York        
Composition of Mortgages and other loans receivable        
Percentage of mortgage loans in geographic area 18.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= aig_CommercialMortgageMember
/ us-gaap_ConcentrationRiskByTypeAxis
= stpr_NY		 18.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= aig_CommercialMortgageMember
/ us-gaap_ConcentrationRiskByTypeAxis
= stpr_NY		    
Life insurance policy loans        
Composition of Mortgages and other loans receivable        
Total mortgage and other loans receivable 2,665aig_FinanceReceivableGross
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_PolicyLoansMember		 2,710aig_FinanceReceivableGross
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_PolicyLoansMember		    
Commercial loans, other loans and notes receivable        
Composition of Mortgages and other loans receivable        
Total mortgage and other loans receivable 3,726aig_FinanceReceivableGross
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= aig_CommercialLoansOtherLoansAndNotesReceivableMember		 3,642aig_FinanceReceivableGross
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= aig_CommercialLoansOtherLoansAndNotesReceivableMember