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LENDING ACTIVITIES (Details - Credit quality indicators for commercial mortgages) (USD $)
In Millions, unless otherwise specified
3 Months Ended 12 Months Ended
Mar. 31, 2015
loan
Dec. 31, 2014
loan
Mar. 31, 2014
Dec. 31, 2013
Credit quality indicators for commercial mortgage loans        
Mortgage and other loans receivable, net $ 25,313us-gaap_LoansAndLeasesReceivableNetReportedAmount $ 24,990us-gaap_LoansAndLeasesReceivableNetReportedAmount    
Allowance for losses 250us-gaap_LoansAndLeasesReceivableAllowance 271us-gaap_LoansAndLeasesReceivableAllowance 299us-gaap_LoansAndLeasesReceivableAllowance 312us-gaap_LoansAndLeasesReceivableAllowance
Apartments        
Credit quality indicators for commercial mortgage loans        
In good standing 3,383us-gaap_FinancingReceivableRecordedInvestmentCurrent
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aig_CommercialApartmentsFinancingReceivableMember
3,384us-gaap_FinancingReceivableRecordedInvestmentCurrent
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aig_CommercialApartmentsFinancingReceivableMember
   
Restructured 0aig_FinancingReceivableRecordedInvestmentCurrentRestructured
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aig_CommercialApartmentsFinancingReceivableMember
0aig_FinancingReceivableRecordedInvestmentCurrentRestructured
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aig_CommercialApartmentsFinancingReceivableMember
   
90 days or less delinquent 0aig_FinancingReceivableRecordedInvestment90DaysOrLessPastDue
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aig_CommercialApartmentsFinancingReceivableMember
0aig_FinancingReceivableRecordedInvestment90DaysOrLessPastDue
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aig_CommercialApartmentsFinancingReceivableMember
   
Greater than 90 days delinquent or in process of foreclosure 0aig_FinancingReceivableRecordedInvestmentGreaterThan90DaysPastDue
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aig_CommercialApartmentsFinancingReceivableMember
0aig_FinancingReceivableRecordedInvestmentGreaterThan90DaysPastDue
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aig_CommercialApartmentsFinancingReceivableMember
   
Mortgage and other loans receivable, net 3,383us-gaap_LoansAndLeasesReceivableNetReportedAmount
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aig_CommercialApartmentsFinancingReceivableMember
3,384us-gaap_LoansAndLeasesReceivableNetReportedAmount
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aig_CommercialApartmentsFinancingReceivableMember
   
Allowance for losses 1us-gaap_LoansAndLeasesReceivableAllowance
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aig_CommercialApartmentsFinancingReceivableMember
3us-gaap_LoansAndLeasesReceivableAllowance
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aig_CommercialApartmentsFinancingReceivableMember
   
Offices        
Credit quality indicators for commercial mortgage loans        
In good standing 6,449us-gaap_FinancingReceivableRecordedInvestmentCurrent
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aig_CommercialOfficesFinancingReceivableMember
6,100us-gaap_FinancingReceivableRecordedInvestmentCurrent
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aig_CommercialOfficesFinancingReceivableMember
   
Restructured 408aig_FinancingReceivableRecordedInvestmentCurrentRestructured
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aig_CommercialOfficesFinancingReceivableMember
343aig_FinancingReceivableRecordedInvestmentCurrentRestructured
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aig_CommercialOfficesFinancingReceivableMember
   
90 days or less delinquent 0aig_FinancingReceivableRecordedInvestment90DaysOrLessPastDue
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aig_CommercialOfficesFinancingReceivableMember
0aig_FinancingReceivableRecordedInvestment90DaysOrLessPastDue
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aig_CommercialOfficesFinancingReceivableMember
   
Greater than 90 days delinquent or in process of foreclosure 14aig_FinancingReceivableRecordedInvestmentGreaterThan90DaysPastDue
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aig_CommercialOfficesFinancingReceivableMember
75aig_FinancingReceivableRecordedInvestmentGreaterThan90DaysPastDue
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aig_CommercialOfficesFinancingReceivableMember
   
Mortgage and other loans receivable, net 6,871us-gaap_LoansAndLeasesReceivableNetReportedAmount
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aig_CommercialOfficesFinancingReceivableMember
6,518us-gaap_LoansAndLeasesReceivableNetReportedAmount
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aig_CommercialOfficesFinancingReceivableMember
   
Allowance for losses 74us-gaap_LoansAndLeasesReceivableAllowance
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aig_CommercialOfficesFinancingReceivableMember
86us-gaap_LoansAndLeasesReceivableAllowance
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aig_CommercialOfficesFinancingReceivableMember
   
Retail        
Credit quality indicators for commercial mortgage loans        
In good standing 4,073us-gaap_FinancingReceivableRecordedInvestmentCurrent
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aig_CommercialRetailFinancingReceivableMember
3,807us-gaap_FinancingReceivableRecordedInvestmentCurrent
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aig_CommercialRetailFinancingReceivableMember
   
Restructured 6aig_FinancingReceivableRecordedInvestmentCurrentRestructured
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aig_CommercialRetailFinancingReceivableMember
7aig_FinancingReceivableRecordedInvestmentCurrentRestructured
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aig_CommercialRetailFinancingReceivableMember
   
90 days or less delinquent 0aig_FinancingReceivableRecordedInvestment90DaysOrLessPastDue
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aig_CommercialRetailFinancingReceivableMember
10aig_FinancingReceivableRecordedInvestment90DaysOrLessPastDue
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aig_CommercialRetailFinancingReceivableMember
   
Greater than 90 days delinquent or in process of foreclosure 10aig_FinancingReceivableRecordedInvestmentGreaterThan90DaysPastDue
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aig_CommercialRetailFinancingReceivableMember
0aig_FinancingReceivableRecordedInvestmentGreaterThan90DaysPastDue
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aig_CommercialRetailFinancingReceivableMember
   
Mortgage and other loans receivable, net 4,089us-gaap_LoansAndLeasesReceivableNetReportedAmount
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aig_CommercialRetailFinancingReceivableMember
3,824us-gaap_LoansAndLeasesReceivableNetReportedAmount
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aig_CommercialRetailFinancingReceivableMember
   
Allowance for losses 29us-gaap_LoansAndLeasesReceivableAllowance
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aig_CommercialRetailFinancingReceivableMember
28us-gaap_LoansAndLeasesReceivableAllowance
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aig_CommercialRetailFinancingReceivableMember
   
Industrial        
Credit quality indicators for commercial mortgage loans        
In good standing 2,020us-gaap_FinancingReceivableRecordedInvestmentCurrent
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aig_CommercialIndustrialFinancingReceivableMember
1,689us-gaap_FinancingReceivableRecordedInvestmentCurrent
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aig_CommercialIndustrialFinancingReceivableMember
   
Restructured 0aig_FinancingReceivableRecordedInvestmentCurrentRestructured
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aig_CommercialIndustrialFinancingReceivableMember
0aig_FinancingReceivableRecordedInvestmentCurrentRestructured
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aig_CommercialIndustrialFinancingReceivableMember
   
90 days or less delinquent 0aig_FinancingReceivableRecordedInvestment90DaysOrLessPastDue
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aig_CommercialIndustrialFinancingReceivableMember
0aig_FinancingReceivableRecordedInvestment90DaysOrLessPastDue
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aig_CommercialIndustrialFinancingReceivableMember
   
Greater than 90 days delinquent or in process of foreclosure 0aig_FinancingReceivableRecordedInvestmentGreaterThan90DaysPastDue
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aig_CommercialIndustrialFinancingReceivableMember
0aig_FinancingReceivableRecordedInvestmentGreaterThan90DaysPastDue
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aig_CommercialIndustrialFinancingReceivableMember
   
Mortgage and other loans receivable, net 2,020us-gaap_LoansAndLeasesReceivableNetReportedAmount
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aig_CommercialIndustrialFinancingReceivableMember
1,689us-gaap_LoansAndLeasesReceivableNetReportedAmount
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aig_CommercialIndustrialFinancingReceivableMember
   
Allowance for losses 23us-gaap_LoansAndLeasesReceivableAllowance
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aig_CommercialIndustrialFinancingReceivableMember
22us-gaap_LoansAndLeasesReceivableAllowance
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aig_CommercialIndustrialFinancingReceivableMember
   
Hotel        
Credit quality indicators for commercial mortgage loans        
In good standing 1,713us-gaap_FinancingReceivableRecordedInvestmentCurrent
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aig_CommercialHotelFinancingReceivableMember
1,660us-gaap_FinancingReceivableRecordedInvestmentCurrent
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aig_CommercialHotelFinancingReceivableMember
   
Restructured 16aig_FinancingReceivableRecordedInvestmentCurrentRestructured
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aig_CommercialHotelFinancingReceivableMember
17aig_FinancingReceivableRecordedInvestmentCurrentRestructured
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aig_CommercialHotelFinancingReceivableMember
   
90 days or less delinquent 0aig_FinancingReceivableRecordedInvestment90DaysOrLessPastDue
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aig_CommercialHotelFinancingReceivableMember
0aig_FinancingReceivableRecordedInvestment90DaysOrLessPastDue
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aig_CommercialHotelFinancingReceivableMember
   
Greater than 90 days delinquent or in process of foreclosure 0aig_FinancingReceivableRecordedInvestmentGreaterThan90DaysPastDue
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aig_CommercialHotelFinancingReceivableMember
0aig_FinancingReceivableRecordedInvestmentGreaterThan90DaysPastDue
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aig_CommercialHotelFinancingReceivableMember
   
Mortgage and other loans receivable, net 1,729us-gaap_LoansAndLeasesReceivableNetReportedAmount
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aig_CommercialHotelFinancingReceivableMember
1,677us-gaap_LoansAndLeasesReceivableNetReportedAmount
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aig_CommercialHotelFinancingReceivableMember
   
Allowance for losses 6us-gaap_LoansAndLeasesReceivableAllowance
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aig_CommercialHotelFinancingReceivableMember
6us-gaap_LoansAndLeasesReceivableAllowance
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aig_CommercialHotelFinancingReceivableMember
   
Others        
Credit quality indicators for commercial mortgage loans        
In good standing 1,080us-gaap_FinancingReceivableRecordedInvestmentCurrent
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aig_CommercialOtherFinancingReceivableMember
1,812us-gaap_FinancingReceivableRecordedInvestmentCurrent
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aig_CommercialOtherFinancingReceivableMember
   
Restructured 0aig_FinancingReceivableRecordedInvestmentCurrentRestructured
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aig_CommercialOtherFinancingReceivableMember
0aig_FinancingReceivableRecordedInvestmentCurrentRestructured
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aig_CommercialOtherFinancingReceivableMember
   
90 days or less delinquent 0aig_FinancingReceivableRecordedInvestment90DaysOrLessPastDue
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aig_CommercialOtherFinancingReceivableMember
5aig_FinancingReceivableRecordedInvestment90DaysOrLessPastDue
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aig_CommercialOtherFinancingReceivableMember
   
Greater than 90 days delinquent or in process of foreclosure 0aig_FinancingReceivableRecordedInvestmentGreaterThan90DaysPastDue
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aig_CommercialOtherFinancingReceivableMember
0aig_FinancingReceivableRecordedInvestmentGreaterThan90DaysPastDue
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aig_CommercialOtherFinancingReceivableMember
   
Mortgage and other loans receivable, net 1,080us-gaap_LoansAndLeasesReceivableNetReportedAmount
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aig_CommercialOtherFinancingReceivableMember
1,817us-gaap_LoansAndLeasesReceivableNetReportedAmount
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aig_CommercialOtherFinancingReceivableMember
   
Allowance for losses 10us-gaap_LoansAndLeasesReceivableAllowance
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aig_CommercialOtherFinancingReceivableMember
14us-gaap_LoansAndLeasesReceivableAllowance
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aig_CommercialOtherFinancingReceivableMember
   
Commercial mortgages        
Credit quality indicators for commercial mortgage loans        
Number of loans in good standing 983aig_FinancingReceivableOnRealEstateCurrentNumberOfLoans
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aig_CommercialMortgageMember
1,007aig_FinancingReceivableOnRealEstateCurrentNumberOfLoans
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aig_CommercialMortgageMember
   
Number of loans restructured 8aig_FinancingReceivableOnRealEstateRestructuredNumberOfLoans
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aig_CommercialMortgageMember
7aig_FinancingReceivableOnRealEstateRestructuredNumberOfLoans
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aig_CommercialMortgageMember
   
Number of loans 90 days or less delinquent 1aig_FinancingReceivableOnRealEstate90DaysOrLessPastDueNumberOfLoans
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aig_CommercialMortgageMember
6aig_FinancingReceivableOnRealEstate90DaysOrLessPastDueNumberOfLoans
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aig_CommercialMortgageMember
   
Number of loans greater than 90 days delinquent or in process of foreclosure 5aig_FinancingReceivableOnRealEstateGreaterThan90DaysPastDueNumberOfLoans
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aig_CommercialMortgageMember
4aig_FinancingReceivableOnRealEstateGreaterThan90DaysPastDueNumberOfLoans
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aig_CommercialMortgageMember
   
Number of Loans 997aig_FinancingReceivableNumberOfLoans
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aig_CommercialMortgageMember
1,024aig_FinancingReceivableNumberOfLoans
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aig_CommercialMortgageMember
   
In good standing 18,718us-gaap_FinancingReceivableRecordedInvestmentCurrent
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aig_CommercialMortgageMember
18,452us-gaap_FinancingReceivableRecordedInvestmentCurrent
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aig_CommercialMortgageMember
   
Restructured 430aig_FinancingReceivableRecordedInvestmentCurrentRestructured
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aig_CommercialMortgageMember
367aig_FinancingReceivableRecordedInvestmentCurrentRestructured
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aig_CommercialMortgageMember
   
90 days or less delinquent 0aig_FinancingReceivableRecordedInvestment90DaysOrLessPastDue
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aig_CommercialMortgageMember
15aig_FinancingReceivableRecordedInvestment90DaysOrLessPastDue
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aig_CommercialMortgageMember
   
Greater than 90 days delinquent or in process of foreclosure 24aig_FinancingReceivableRecordedInvestmentGreaterThan90DaysPastDue
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aig_CommercialMortgageMember
75aig_FinancingReceivableRecordedInvestmentGreaterThan90DaysPastDue
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aig_CommercialMortgageMember
   
Mortgage and other loans receivable, net 19,172us-gaap_LoansAndLeasesReceivableNetReportedAmount
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aig_CommercialMortgageMember
18,909us-gaap_LoansAndLeasesReceivableNetReportedAmount
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aig_CommercialMortgageMember
   
Allowance for losses $ 143us-gaap_LoansAndLeasesReceivableAllowance
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aig_CommercialMortgageMember
$ 159us-gaap_LoansAndLeasesReceivableAllowance
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aig_CommercialMortgageMember
   
Percentage of loans that are current as to payments of principal and interest 98.00%aig_FinancingReceivableRecordedInvestmentCurrentPercentage
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aig_CommercialMortgageMember
98.00%aig_FinancingReceivableRecordedInvestmentCurrentPercentage
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aig_CommercialMortgageMember
   
Percentage restructured 2.00%aig_FinancingReceivableRecordedInvestmentRestructuredPercentage
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aig_CommercialMortgageMember
2.00%aig_FinancingReceivableRecordedInvestmentRestructuredPercentage
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aig_CommercialMortgageMember
   
Percentage Total 100.00%aig_FinancingReceivableRecordedInvestmentPercentage
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aig_CommercialMortgageMember
100.00%aig_FinancingReceivableRecordedInvestmentPercentage
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aig_CommercialMortgageMember
   
Percentage of loans with allowance for losses 1.00%aig_FinancingReceivableValuationAllowancePercentage
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aig_CommercialMortgageMember
1.00%aig_FinancingReceivableValuationAllowancePercentage
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aig_CommercialMortgageMember
   
Percentage of current commercial mortgages held 99.00%aig_FinancingReceivableCurrentCommercialMortgagesHeldPercentage
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aig_CommercialMortgageMember
     
Percentage greater than 90 days delinquent or in foreclosure 0.00%aig_FinancingReceivableRecordedInvestmentGreaterThan90DaysPastDuePercentage
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aig_CommercialMortgageMember