Condensed Consolidated Statements of Equity - 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, 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	(147)	(147)			219	(366)
Purchase of common stock	(603)	(603)			(603)
Net income (loss) attributable to AIG or noncontrolling interests	(87)	30					30		(117)
Dividends on preferred stock ($0.000365625 per share) and preferred stock redemption premiums	(7)
Dividends on preferred stock ($365.625 per share)	(7)	(7)					(7)
Dividends on common stock	(234)	(234)					(234)
Other comprehensive (loss) income	3,913	3,287						3,287	626
Contributions from noncontrolling interests	16								16
Distributions to noncontrolling interests	(58)								(58)
Other	59	21				13	8		38
Balance, end of period at Mar. 31, 2023	46,306	43,317	485	4,766	(56,857)	79,562	34,690	(19,329)	2,989
Balance, beginning 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	(27)	(27)			268	(295)
Redemption of preferred stock	(485)	(485)	(485)
Purchase of common stock	(1,682)	(1,682)			(1,682)
Net income (loss) attributable to AIG or noncontrolling interests	1,600	1,216					1,216		384
Dividends on preferred stock ($0.000365625 per share) and preferred stock redemption premiums	(22)	(22)					(22)
Dividends on common stock	(243)	(243)					(243)
Other comprehensive (loss) income	(1,057)	(759)						(759)	(298)
Net decrease due to divestitures and acquisitions	(285)	(83)				(10)		(73)	(202)
Contributions from noncontrolling interests	11								11
Distributions to noncontrolling interests	(70)								(70)
Other	69	119				120	(1)		(50)
Balance, end of period at Mar. 31, 2024	$ 49,110	$ 43,385	$ 0	$ 4,766	$ (60,603)	$ 75,625	$ 38,466	$ (14,869)	$ 5,725