Consolidated Statements of Equity - USD ($) $ in Millions	Total	Total AIG Shareholders' Equity	Preferred Stock and Additional Paid-In Capital	Common Stock	Treasury Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Non redeemable Non-controlling Interests
Cumulative effect of change in accounting principle, net of tax								$ (576)
Balance at Dec. 31, 2017	$ 65,708	$ 65,171	$ 0	$ 4,766	$ (47,595)	$ 81,078	$ 21,457	5,465	$ 537
Common stock issued under stock plans	(150)	(150)	0	0	187	(337)	0	0	0
Purchase of common stock	(646)	(646)	0	0	(646)	0	0	0	0
Net income (loss) attributable to AIG or other noncontrolling interests	1,880	1,875	0	0	0	0	1,875	0	5
Dividends on common stock	(575)	(575)	0	0	0	0	(575)	0	0
Other comprehensive income (loss)	(4,659)	(4,659)	0	0	0	0	0	(4,659)	0
Net increase due to acquisitions and consolidations	98	0	0	0	0	0	0	0	98
Contributions from noncontrolling interests	3	0	0	0	0	0	0	0	3
Distributions to noncontrolling interests	(27)	0	0	0	0	0	0	0	(27)
Other	173	178	0	0	2	183	(7)	0	(5)
Balance at Jun. 30, 2018	61,797	61,186	0	4,766	(48,052)	80,924	23,318	230	611
Cumulative effect of change in accounting principle, net of tax	(8)	(8)	0	0	0	0	568	(576)	0
Balance at Mar. 31, 2018	63,357	62,792	0	4,766	(47,706)	80,841	22,671	2,220	565
Common stock issued under stock plans	0	0	0	0	1	(1)	0	0	0
Purchase of common stock	(348)	(348)	0	0	(348)	0	0	0	0
Net income (loss) attributable to AIG or other noncontrolling interests	931	937	0	0	0	0	937	0	(6)
Dividends on common stock	(286)	(286)	0	0	0	0	(286)	0	0
Other comprehensive income (loss)	(1,990)	(1,990)	0	0	0	0	0	(1,990)	0
Net increase due to acquisitions and consolidations	62	0	0	0	0	0	0	0	62
Contributions from noncontrolling interests	(7)	0	0	0	0	0	0	0	(7)
Distributions to noncontrolling interests	(2)	0	0	0	0	0	0	0	(2)
Other	80	81	0	0	1	84	(4)	0	(1)
Balance at Jun. 30, 2018	61,797	61,186	0	4,766	(48,052)	80,924	23,318	230	611
Cumulative effect of change in accounting principle, net of tax	0	0	0	0	0	0	0	0	0
Balance at Dec. 31, 2018	57,309	56,361	0	4,766	(49,144)	81,268	20,884	(1,413)	948
Dividends on preferred stock	(7)	(7)	0	0	0	0	(7)	0	0
Balance at Mar. 31, 2019	62,093	60,787	485	4,766	(48,999)	81,148	21,259	2,128	1,306
Balance at Dec. 31, 2018	57,309	56,361	0	4,766	(49,144)	81,268	20,884	(1,413)	948
Preferred stock issued	485	485	485	0	0	0	0	0	0
Common stock issued under stock plans	(78)	(78)	0	0	153	(231)	0	0	0
Purchase of common stock	0	0	0	0	0	0	0	0	0
Net income (loss) attributable to AIG or other noncontrolling interests	2,327	1,763	0	0	0	0	1,763	0	564
Dividends on preferred stock	(7)	(7)	0	0	0	0	(7)	0	0
Dividends on common stock	(557)	(557)	0	0	0	0	(557)	0	0
Other comprehensive income (loss)	6,420	6,404	0	0	0	0	0	6,404	16
Current and deferred income taxes	0	0	0	0	0	0	0	0	0
Net increase due to acquisitions and consolidations	96	0	0	0	0	0	0	0	96
Contributions from noncontrolling interests	2	0	0	0	0	0	0	0	2
Distributions to noncontrolling interests	(69)	0	0	0	0	0	0	0	(69)
Other	177	168	0	0	0	174	(6)	0	9
Balance at Jun. 30, 2019	66,105	64,539	485	4,766	(48,991)	81,211	22,077	4,991	1,566
Balance at Mar. 31, 2019	62,093	60,787	485	4,766	(48,999)	81,148	21,259	2,128	1,306
Preferred stock issued	0	0	0	0	0	0	0	0	0
Common stock issued under stock plans	(1)	(1)	0	0	8	(9)	0	0	0
Purchase of common stock	0	0	0	0	0	0	0	0	0
Net income (loss) attributable to AIG or other noncontrolling interests	1,390	1,109	0	0	0	0	1,109	0	281
Dividends on common stock	(279)	(279)	0	0	0	0	(279)	0	0
Other comprehensive income (loss)	2,873	2,863	0	0	0	0	0	2,863	10
Current and deferred income taxes	1	1	0	0	0	1	0	0	0
Net increase due to acquisitions and consolidations	(12)	0	0	0	0	0	0	0	(12)
Contributions from noncontrolling interests	(10)	0	0	0	0	0	0	0	(10)
Distributions to noncontrolling interests	(10)	0	0	0	0	0	0	0	(10)
Other	67	66	0	0	0	71	(5)	0	1
Balance at Jun. 30, 2019	$ 66,105	$ 64,539	$ 485	$ 4,766	$ (48,991)	$ 81,211	$ 22,077	$ 4,991	$ 1,566