Condensed Consolidated Statements of Equity (unaudited) - 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, 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	(140)	(140)			230	(370)
Purchase of common stock	(1,165)	(1,165)			(1,165)
Net income (loss) attributable to AIG or noncontrolling interests	1,604	1,523					1,523		81
Dividends on preferred stock and preferred stock redemption premiums	(15)
Dividends on preferred stock	(15)	(15)					(15)
Dividends on common stock	(494)	(494)					(494)
Other comprehensive income (loss)	2,175	1,807						1,807	368
Net increase (decrease) due to divestitures and acquisitions	1,175	(86)				(1,913)		1,827	1,261
Contributions from noncontrolling interests	27								27
Distributions to noncontrolling interests	(252)								(252)
Other	122	54				45	9		68
Balance, end of period at Jun. 30, 2023	46,491	42,454	485	4,766	(57,408)	77,677	35,916	(18,982)	4,037
Balance, beginning of period at Mar. 31, 2023	46,306	43,317	485	4,766	(56,857)	79,562	34,690	(19,329)	2,989
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock issued under stock plans	7	7			11	(4)
Purchase of common stock	(562)	(562)			(562)
Net income (loss) attributable to AIG or noncontrolling interests	1,691	1,493					1,493		198
Dividends on preferred stock and preferred stock redemption premiums	(8)
Dividends on preferred stock	(8)	(8)					(8)
Dividends on common stock	(260)	(260)					(260)
Other comprehensive income (loss)	(1,738)	(1,480)						(1,480)	(258)
Net increase (decrease) due to divestitures and acquisitions	1,175	(86)				(1,913)		1,827	1,261
Contributions from noncontrolling interests	11								11
Distributions to noncontrolling interests	(194)								(194)
Other	63	33				32	1		30
Balance, end of period at Jun. 30, 2023	46,491	42,454	485	4,766	(57,408)	77,677	35,916	(18,982)	4,037
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	(17)	(17)			293	(310)
Redemption of preferred stock	(485)	(485)	(485)
Purchase of common stock	(3,359)	(3,359)			(3,359)
Net income (loss) attributable to AIG or noncontrolling interests	(2,284)	(2,761)					(2,761)		477
Dividends on preferred stock and preferred stock redemption premiums	(22)	(22)					(22)
Dividends on common stock	(504)	(504)					(504)
Other comprehensive income (loss)	5,637	5,935						5,935	(298)
Net increase (decrease) due to divestitures and acquisitions	(5,885)	119				(418)		537	(6,004)
Contributions from noncontrolling interests	28								28
Distributions to noncontrolling interests	(72)								(72)
Other	137	188				192	(4)		(51)
Balance, end of period at Jun. 30, 2024	44,475	44,445	0	4,766	(62,255)	75,274	34,225	(7,565)	30
Balance, beginning of period at Mar. 31, 2024	49,110	43,385	0	4,766	(60,603)	75,625	38,466	(14,869)	5,725
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock issued under stock plans	10	10			25	(15)
Purchase of common stock	(1,677)	(1,677)			(1,677)
Net income (loss) attributable to AIG or noncontrolling interests	(3,884)	(3,977)					(3,977)		93
Dividends on preferred stock and preferred stock redemption premiums	0
Dividends on common stock	(261)	(261)					(261)
Other comprehensive income (loss)	6,694	6,694						6,694
Net increase (decrease) due to divestitures and acquisitions	(5,600)	202				(408)		610	(5,802)
Contributions from noncontrolling interests	17								17
Distributions to noncontrolling interests	(2)								(2)
Other	68	69				72	(3)		(1)
Balance, end of period at Jun. 30, 2024	$ 44,475	$ 44,445	$ 0	$ 4,766	$ (62,255)	$ 75,274	$ 34,225	$ (7,565)	$ 30