Consolidated Statements of Equity - USD ($) $ in Millions	Total	Total AIG Share- holders' 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, 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]
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	11,273	10,227					10,227		1,046
Dividends on preferred stock and preferred stock redemption premiums	(29)
Dividends on preferred stock	(29)	(29)					(29)
Dividends on common stock	(982)	(982)					(982)
Other comprehensive income (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								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]
Common stock issued under stock plans	(125)	(125)			298	(423)
Purchase of common stock	(3,014)	(3,014)			(3,014)
Net income (loss) attributable to AIG or noncontrolling interests	3,878	3,643					3,643		235
Dividends on preferred stock and preferred stock redemption premiums	(29)
Dividends on preferred stock	(29)	(29)					(29)
Dividends on common stock	(997)	(997)					(997)
Other comprehensive income (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								49
Distributions to noncontrolling interests	(710)								(710)
Other	185	116				111	5		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]
Common stock issued under stock plans	5	5			329	(324)
Redemption of preferred stock	(485)	(485)	(485)
Purchase of common stock	(6,713)	(6,713)			(6,713)
Net income (loss) attributable to AIG or noncontrolling interests	(926)	(1,404)					(1,404)		478
Dividends on preferred stock and preferred stock redemption premiums	(22)	(22)					(22)
Dividends on common stock	(1,002)	(1,002)					(1,002)
Other comprehensive income (loss)	6,105	6,401						6,401	(296)
Net increase (decrease) due to divestitures and acquisitions	(5,896)	119				(418)		537	(6,015)
Contributions from noncontrolling interests	28								28
Distributions to noncontrolling interests	(72)								(72)
Other	227	271				280	(9)		(44)
Balance, end of period at Dec. 31, 2024	$ 42,550	$ 42,521	$ 0	$ 4,766	$ (65,573)	$ 75,348	$ 35,079	$ (7,099)	$ 29