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)	Accumulated Other Comprehensive Income (Loss) Cumulative effect of change in accounting principle	Non- redeemable Non- controlling Interests
Balance, beginning of period at Dec. 31, 2020	$ 67,199	$ (1,264)	$ 66,362	$ (1,264)	$ 485	$ 4,766	$ (49,322)	$ 81,418	$ 15,504	$ 933	$ 13,511	$ (2,197)	$ 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 attributable to AIG or noncontrolling interests	10,906		10,367						10,367				539
Dividends on preferred stock	(29)		(29)						(29)
Dividends on common stock	(1,083)		(1,083)						(1,083)
Other comprehensive loss	(5,424)		(5,325)								(5,325)		(99)
Net increase (decrease) due to divestitures and acquisitions	1,712		(630)					288			(918)		2,342
Contributions from noncontrolling interests	22		(630)										22
Distributions to noncontrolling interests	(682)												(682)
Other	384		377				101	273	3				7
Balance, end of period at Dec. 31, 2021	$ 69,034		66,068		485	4,766	(51,618)	81,669	25,695		5,071		2,966
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends declared, preferred stock (in dollars per share)	$ 1,462.5
Dividend paid (in dollars per share)	$ 1.28
Common stock issued under stock plans	$ (74)		(74)				294	(368)
Purchase of common stock	(5,149)		(5,149)				(5,149)
Net income attributable to AIG or noncontrolling interests	11,273		10,227	$ 100					10,227				1,046
Dividends on preferred stock	(29)		(29)						(29)
Dividends on common stock	(982)		(982)						(982)
Other comprehensive loss	(32,303)		(29,803)								(29,803)		(2,500)
Net increase (decrease) due to divestitures and acquisitions	1,614		497					(1,619)			2,116		1,117
Contributions from noncontrolling interests	133		497										133
Distributions to noncontrolling interests	(284)												(284)
Other	221		215					233	(18)				6
Balance, end of period at Dec. 31, 2022	$ 43,454		40,970		485	4,766	(56,473)	79,915	34,893		(22,616)		2,484
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends declared, preferred stock (in dollars per share)	$ 1,462.5
Dividend paid (in dollars per share)	$ 1.28
Common stock issued under stock plans	$ (125)		(125)				298	(423)
Purchase of common stock	(3,014)		(3,014)				(3,014)
Net income attributable to AIG or noncontrolling interests	3,878		3,643						3,643				235
Dividends on preferred stock	(29)		(29)						(29)
Dividends on common stock	(997)		(997)						(997)
Other comprehensive loss	5,940		4,641								4,641		1,299
Net increase (decrease) due to divestitures and acquisitions	2,669		145					(3,793)			3,938		2,524
Contributions from noncontrolling interests	49		145										49
Distributions to noncontrolling interests	(710)												(710)
Other	186		117					111	6				69
Balance, end of period at Dec. 31, 2023	$ 51,301		$ 45,351		$ 485	$ 4,766	$ (59,189)	$ 75,810	$ 37,516		$ (14,037)		$ 5,950
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends declared, preferred stock (in dollars per share)	$ 1,462.5
Dividend paid (in dollars per share)	$ 1.40