Consolidated Statements of Equity - USD ($) $ in Millions	Total	Cumulative effect of change in accounting principle	Total AIG Shareholders' Equity	Total AIG Shareholders' Equity Cumulative effect of change in accounting principle	Preferred Stock and Additional Paid-in Capital	Common Stock	Treasury Stock	Additional Paid-in Capital	Retained Earnings	Retained Earnings Cumulative effect of change in accounting principle	Accumulated Other Comprehensive Income (Loss)	Non- redeemable Non- controlling Interests
Balance, beginning of period at Dec. 31, 2019	$ 67,427	$ (487)	$ 65,675	$ (487)	$ 485	$ 4,766	$ (48,987)	$ 81,345	$ 23,084	$ (487)	$ 4,982	$ 1,752
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock issued under stock plans	(99)		(99)				172	(271)
Purchase of common stock	(500)		(500)				(500)
Net income (loss) attributable to AIG or noncontrolling interests	(5,829)		(5,944)						(5,944)			115
Dividends on preferred stock	(29)		(29)						(29)
Dividends on common stock	(1,103)		(1,103)						(1,103)
Other comprehensive income (loss)	8,513		8,529								8,529	(16)
Net increase (decrease) due to divestitures and acquisitions	(958)											(958)
Contributions from noncontrolling interests	108											108
Distributions to noncontrolling interests	(156)											(156)
Other	312		320				(7)	344	(17)			(8)
Balance, end 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	(64)		(64)				217	(281)
Purchase of common stock	(2,643)		(2,643)				(2,614)	(29)
Net income (loss) attributable to AIG or noncontrolling interests	9,923		9,388						9,388			535
Dividends on preferred stock	(29)		(29)						(29)
Dividends on common stock	(1,083)		(1,083)						(1,083)
Other comprehensive income (loss)	(5,830)		(5,725)								(5,725)	(105)
Net increase (decrease) due to divestitures and acquisitions	1,713		(629)					470			(1,099)	2,342
Contributions from noncontrolling interests	22											22
Distributions to noncontrolling interests	(682)											(682)
Other	386		379				101	273	5			7
Balance, end 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	(74)		(74)				294	(368)
Purchase of common stock	(5,149)		(5,149)				(5,149)
Net income (loss) attributable to AIG or noncontrolling interests	11,275		10,276	$ 100					10,276			999
Dividends on preferred stock	(29)		(29)						(29)
Dividends on common stock	(982)		(982)						(982)
Other comprehensive income (loss)	(33,402)		(30,819)								(30,819)	(2,583)
Net increase (decrease) due to divestitures and acquisitions	1,614		608					(1,432)			2,040	1,006
Contributions from noncontrolling interests	133		608									133
Distributions to noncontrolling interests	(284)											(284)
Other	221		215				0	233	(18)			6
Balance, end of period at Dec. 31, 2022	$ 42,235		$ 40,002		$ 485	$ 4,766	$ (56,473)	$ 80,284	$ 33,032		$ (22,092)	$ 2,233