SEGMENT INFORMATION (Details - Continuing operations by reportable segment) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Segment results
Total Revenues	$ 12,635	$ 11,751	$ 12,502	$ 12,632	$ 13,010	$ 12,854	$ 14,724	$ 11,779	$ 49,520	$ 52,367	$ 58,327
Net investment income									14,179	14,065	14,053
Interest Expense									1,168	1,260	1,281
Amortization of deferred acquisition costs									4,288	4,521	5,236
Pre-tax operating income (loss)	$ 875	$ (2,803)	$ 1,667	$ 1,727	$ (3,455)	$ 737	$ 2,858	$ (214)	1,466	(74)	3,281
Eliminations | Total Revenues
Segment results
Pre-tax operating income (loss)									49,520	52,367	58,327
Eliminations | Net investment income
Segment results
Pre-tax operating income (loss)									14,179	14,065	14,053
Eliminations | Interest expense
Segment results
Pre-tax operating income (loss)									1,168	1,260	1,281
Eliminations | Amortization of DAC
Segment results
Pre-tax operating income (loss)									4,288	4,521	5,236
Eliminations | Adjusted Pre-Tax Income (loss)
Segment results
Pre-tax operating income (loss)									1,466	(74)	3,281
AIG Consolidation and Eliminations
Segment results
Total Revenues									(308)	(494)	(496)
Net investment income									(280)	(351)	(315)
Interest Expense									(53)	(120)	(103)
Amortization of deferred acquisition costs									4	(117)	(26)
Pre-tax operating income (loss)									75	42	(76)
Total AIG Consolidated adjusted revenues and adjusted pre-tax income (loss)
Segment results
Total Revenues									50,776	54,191	57,591
Net investment income									14,033	13,945	14,096
Interest Expense									1,168	1,260	1,281
Amortization of deferred acquisition costs									4,579	4,797	5,236
Pre-tax operating income (loss)									3,158	1,415	3,984
General Insurance | Reportable Segments
Segment results
Total Revenues									29,694	33,140	34,668
Net investment income									3,668	3,554	3,746
Interest Expense									22	28	13
Amortization of deferred acquisition costs									3,765	4,121	4,319
Pre-tax operating income (loss)									(813)	(2,051)	628
General Insurance | Reportable Segments | North America
Segment results
Total Revenues									14,600	17,005	18,482
Net investment income									3,145	3,041	3,196
Interest Expense									31	28	13
Amortization of deferred acquisition costs									1,305	1,444	1,699
Pre-tax operating income (loss)									(232)	(2,399)	558
General Insurance | Reportable Segments | International
Segment results
Total Revenues									15,094	16,135	16,186
Net investment income									523	513	550
Interest Expense									(9)	0	0
Amortization of deferred acquisition costs									2,460	2,677	2,620
Pre-tax operating income (loss)									(581)	348	70
Life and Retirement | Reportable Segments
Segment results
Total Revenues									15,586	13,778	15,322
Net investment income									7,816	7,622	7,541
Interest Expense									109	92	52
Amortization of deferred acquisition costs									743	613	794
Pre-tax operating income (loss)									3,831	3,428	3,124
Life and Retirement | Reportable Segments | Individual Retirement
Segment results
Total Revenues									5,514	5,758	6,450
Net investment income									4,013	3,878	3,805
Interest Expense									58	50	27
Amortization of deferred acquisition costs									415	298	431
Pre-tax operating income (loss)									2,289	2,269	1,812
Life and Retirement | Reportable Segments | Group Retirement
Segment results
Total Revenues									2,848	2,769	2,834
Net investment income									2,164	2,146	2,192
Interest Expense									32	26	15
Amortization of deferred acquisition costs									84	129	50
Pre-tax operating income (loss)									1,004	931	1,100
Life and Retirement | Reportable Segments | Life insurance
Segment results
Total Revenues									4,056	3,818	3,771
Net investment income									1,044	1,035	1,034
Interest Expense									13	12	7
Amortization of deferred acquisition costs									239	182	311
Pre-tax operating income (loss)									274	(37)	(51)
Life and Retirement | Reportable Segments | Institutional Markets
Segment results
Total Revenues									3,168	1,433	2,267
Net investment income									595	563	510
Interest Expense									6	4	3
Amortization of deferred acquisition costs									5	4	2
Pre-tax operating income (loss)									264	265	263
Other Operations | Reportable Segments
Segment results
Total Revenues									1,413	2,517	2,326
Net investment income									53	207	196
Interest Expense									968	978	1,027
Amortization of deferred acquisition costs									(9)	72	47
Pre-tax operating income (loss)									(1,405)	(1,011)	(825)
Legacy Portfolio | Reportable Segments
Segment results
Total Revenues									4,391	5,250	5,771
Net investment income									2,776	2,913	2,928
Interest Expense									122	282	292
Amortization of deferred acquisition costs									76	108	102
Pre-tax operating income (loss)									$ 1,470	$ 1,007	$ 1,133