Condensed Consolidated Statements of Equity (unaudited) - 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
Balance, beginning of period at Dec. 31, 2020	$ 67,199	$ 66,362	$ 485	$ 4,766	$ (49,322)	$ 81,418	$ 15,504	$ 13,511	$ 837
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock issued under stock plans	(82)	(82)			178	(260)
Purchase of common stock	(592)	(592)			(592)
Net income attributable to AIG or noncontrolling interests	4,080	3,975					3,975		105
Dividends on preferred stock	(15)	(15)					(15)
Dividends on common stock	(550)	(550)					(550)
Other comprehensive loss	(3,303)	(3,302)						(3,302)	(1)
Net decrease due to divestitures and acquisitions	58								58
Contributions from noncontrolling interests	7								7
Distributions to noncontrolling interests	(181)								(181)
Other	287	287			102	164	21
Balance, end of period at Jun. 30, 2021	66,908	66,083	485	4,766	(49,634)	81,322	18,935	10,209	825
Balance, beginning of period at Mar. 31, 2021	63,560	62,679	485	4,766	(49,412)	81,253	19,121	6,466	881
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock issued under stock plans	2	2			7	(5)
Purchase of common stock	(230)	(230)			(230)
Net income attributable to AIG or noncontrolling interests	150	99					99		51
Dividends on preferred stock	(8)	(8)					(8)
Dividends on common stock	(274)	(274)					(274)
Other comprehensive loss	3,742	3,743						3,743	(1)
Net decrease due to divestitures and acquisitions	(17)								(17)
Contributions from noncontrolling interests	2								2
Distributions to noncontrolling interests	(91)								(91)
Other	72	72			1	74	(3)
Balance, end of period at Jun. 30, 2021	66,908	66,083	485	4,766	(49,634)	81,322	18,935	10,209	825
Balance, beginning of period at Dec. 31, 2021	68,912	65,956	485	4,766	(51,618)	81,851	23,785	6,687	2,956
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock issued under stock plans	(85)	(85)			240	(325)
Purchase of common stock	(3,102)	(3,102)			(3,102)
Net income attributable to AIG or noncontrolling interests	8,048	7,296					7,296		752
Dividends on preferred stock	(15)	(15)					(15)
Dividends on common stock	(506)	(506)					(506)
Other comprehensive loss	(26,415)	(24,343)						(24,343)	(2,072)
Contributions from noncontrolling interests	5								5
Distributions to noncontrolling interests	(167)								(167)
Other	149	143				153	(10)		6
Balance, end of period at Jun. 30, 2022	46,824	45,344	485	4,766	(54,480)	81,679	30,550	(17,656)	1,480
Balance, beginning of period at Mar. 31, 2022	58,103	55,944	485	4,766	(52,791)	81,620	27,764	(5,900)	2,159
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock issued under stock plans	5	5			10	(5)
Purchase of common stock	(1,699)	(1,699)			(1,699)
Net income attributable to AIG or noncontrolling interests	3,392	3,036					3,036		356
Dividends on preferred stock	(8)	(8)					(8)
Dividends on common stock	(248)	(248)					(248)
Other comprehensive loss	(12,767)	(11,756)						(11,756)	(1,011)
Contributions from noncontrolling interests	5								5
Distributions to noncontrolling interests	(35)								(35)
Other	76	70				64	6		6
Balance, end of period at Jun. 30, 2022	$ 46,824	$ 45,344	$ 485	$ 4,766	$ (54,480)	$ 81,679	$ 30,550	$ (17,656)	$ 1,480