Consolidated Statements of Equity - USD ($) $ in Millions	Total	Total AIG Shareholders' Equity	Common Stock	Treasury Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Non redeemable Non-controlling Interests
Balance at Dec. 31, 2015	$ 90,210	$ 89,658	$ 4,766	$ (30,098)	$ 81,510	$ 30,943	$ 2,537	$ 552
Increase (Decrease) in Stockholders' Equity
Common stock issued under stock plans	(89)	(89)		86	(175)
Purchase of common stock	(11,460)	(11,460)		(11,460)
Net income (loss) attributable to AIG or other noncontrolling interests	(349)	(849)				(849)		500
Dividends	(1,372)	(1,372)				(1,372)
Other comprehensive income (loss)	693	693					693	0
Current and deferred income taxes	(208)	(208)			(208)
Net increase due to acquisitions and consolidations	43							43
Contributions from noncontrolling interests	22							22
Distributions to noncontrolling interests	(570)							(570)
Other	(62)	(73)		1	(63)	(11)		11
Balance at Dec. 31, 2016	76,858	76,300	4,766	(41,471)	81,064	28,711	3,230	558
Increase (Decrease) in Stockholders' Equity
Common stock issued under stock plans	(178)	(178)		147	(325)
Purchase of common stock	(6,275)	(6,275)		(6,275)
Net income (loss) attributable to AIG or other noncontrolling interests	(6,056)	(6,084)				(6,084)		28
Dividends	(1,172)	(1,172)				(1,172)
Other comprehensive income (loss)	2,235	2,235					2,235	0
Current and deferred income taxes	(4)	(4)			(4)
Net increase due to acquisitions and consolidations	101							101
Contributions from noncontrolling interests	42							42
Distributions to noncontrolling interests	(193)							(193)
Other	350	349		4	343	2		1
Balance at Dec. 31, 2017	65,708	65,171	4,766	(47,595)	81,078	21,457	5,465	537
Increase (Decrease) in Stockholders' Equity
Cumulative effect of change in accounting principle, net of tax	(8)	(8)				568	(576)
Common stock issued under stock plans	(155)	(155)		189	(344)
Purchase of common stock	(1,739)	(1,739)		(1,739)
Net income (loss) attributable to AIG or other noncontrolling interests	61	(6)				(6)		67
Dividends	(1,138)	(1,138)				(1,138)
Other comprehensive income (loss)	(6,293)	(6,302)					(6,302)	9
Current and deferred income taxes	0	0			0	0
Net increase due to acquisitions and consolidations	63							63
Contributions from noncontrolling interests	373							373
Distributions to noncontrolling interests	(96)							(96)
Other	533	538		1	534	3		(5)
Balance at Dec. 31, 2018	$ 57,309	$ 56,361	$ 4,766	$ (49,144)	$ 81,268	$ 20,884	$ (1,413)	$ 948