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	(77)	(77)			202	(279)
Purchase of common stock	(1,651)	(1,651)			(1,622)	(29)
Net income attributable to AIG or noncontrolling interests	5,817	5,642					5,642		175
Dividends on preferred stock	(22)	(22)					(22)
Dividends on common stock	(819)	(819)					(819)
Other comprehensive loss	(4,905)	(4,905)						(4,905)	0
Net decrease due to divestitures and acquisitions	50								50
Contributions from noncontrolling interests	8								8
Distributions to noncontrolling interests	(279)								(279)
Other	338	333			101	217	15		5
Balance, end of period at Sep. 30, 2021	65,659	64,863	485	4,766	(50,641)	81,327	20,320	8,606	796
Balance, beginning of period at Jun. 30, 2021	66,908	66,083	485	4,766	(49,634)	81,322	18,935	10,209	825
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock issued under stock plans	5	5			24	(19)
Purchase of common stock	(1,059)	(1,059)			(1,030)	(29)
Net income attributable to AIG or noncontrolling interests	1,737	1,667					1,667		70
Dividends on preferred stock	(7)	(7)					(7)
Dividends on common stock	(269)	(269)					(269)
Other comprehensive loss	(1,602)	(1,603)						(1,603)	1
Net decrease due to divestitures and acquisitions	(8)								(8)
Contributions from noncontrolling interests	1								1
Distributions to noncontrolling interests	(98)								(98)
Other	51	46			(1)	53	(6)		5
Balance, end of period at Sep. 30, 2021	65,659	64,863	485	4,766	(50,641)	81,327	20,320	8,606	796
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	(83)	(83)			243	(326)
Purchase of common stock	(4,370)	(4,370)			(4,370)
Net income attributable to AIG or noncontrolling interests	11,089	10,005					10,005		1,084
Dividends on preferred stock	(22)	(22)					(22)
Dividends on common stock	(746)	(746)					(746)
Other comprehensive loss	(35,388)	(32,520)						(32,520)	(2,868)
Net decrease due to divestitures and acquisitions	1,626	608				(1,432)		2,040	1,018
Contributions from noncontrolling interests	22								22
Distributions to noncontrolling interests	(230)								(230)
Other	191	195				208	(13)		(4)
Balance, end of period at Sep. 30, 2022	41,001	39,023	485	4,766	(55,745)	80,301	33,009	(23,793)	1,978
Balance, beginning of period at Jun. 30, 2022	46,824	45,344	485	4,766	(54,480)	81,679	30,550	(17,656)	1,480
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock issued under stock plans	2	2			3	(1)
Purchase of common stock	(1,268)	(1,268)			(1,268)
Net income attributable to AIG or noncontrolling interests	3,041	2,709					2,709		332
Dividends on preferred stock	(7)	(7)					(7)
Dividends on common stock	(240)	(240)					(240)
Other comprehensive loss	(8,973)	(8,177)						(8,177)	(796)
Net decrease due to divestitures and acquisitions	1,626	608				(1,432)		2,040	1,018
Contributions from noncontrolling interests	17								17
Distributions to noncontrolling interests	(63)								(63)
Other	42	52				55	(3)		(10)
Balance, end of period at Sep. 30, 2022	$ 41,001	$ 39,023	$ 485	$ 4,766	$ (55,745)	$ 80,301	$ 33,009	$ (23,793)	$ 1,978