SHARE-BASED AND OTHER COMPENSATION PLANS (Details - Employee Plans, Share-settled Awards - assumptions used to estimate the fair value of PSUs) (USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	May 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense	$ 349.0	$ 457.0	$ 286.0
Deferred stock units (DSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted under the plans	19,434	25,735	28,477
Compensation expense	1.5	1.2	0.6
Performance share units
Assumptions used to estimate the fair value of PSUs based on AIG's TSR
Expected dividend yield (as a percent)	1.13%	0.38%
Expected volatility (as a percent)	23.66%	30.79%
Risk-free interest rate (as a percent)	0.76%	0.50%
2013 Omnibus Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock reserved for future grant	45,000,000
Number of shares reserved for future grants	50,206,557
Reduction in the number of shares available for grants	1
AIG 2013 Long Term Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance period	3 years
Number of installments	3
Completion of age of the employee after which the awards can be vested	65 years
AIG 2013 Long Term Incentive Plan | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of performance period depending on which actual number of awards can be earned	150.00%
Vesting period, from date of grant	5 years
AIG 2013 Long Term Incentive Plan | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of performance period depending on which actual number of awards can be earned	0.00%
AIG 2013 Long Term Incentive Plan | Vesting on January 1 from the next three years of immediately following the end of the performance period
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period, from date of grant	2 years
AIG 2010 Stock Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock reserved for future grant	60,000,000
Number of shares reserved for future grants				0
Reduction in the number of shares available for grants	1
SICO Plans
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Payments for various benefits provided under the plan	$ 0
SICO Plans | Performance share units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted under the plans	0