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	(132)	(132)			241	(373)
Purchase of common stock	(1,959)	(1,959)			(1,959)
Net income (loss) attributable to AIG or noncontrolling interests	4,351	3,550					3,550		801
Dividends on preferred stock and preferred stock redemption premiums	(22)
Dividends on preferred stock	(22)	(22)					(22)
Dividends on common stock	(748)	(748)					(748)
Other comprehensive income (loss)	(2,743)	(1,679)						(1,679)	(1,064)
Net increase (decrease) due to divestitures and acquisitions	1,127	(92)				(1,858)		1,766	1,219
Contributions from noncontrolling interests	35								35
Distributions to noncontrolling interests	(317)								(317)
Other	167	96				80	16		71
Balance, end of period at Sep. 30, 2023	43,213	39,984	485	4,766	(58,191)	77,764	37,689	(22,529)	3,229
Balance, beginning of period at Jun. 30, 2023	46,491	42,454	485	4,766	(57,408)	77,677	35,916	(18,982)	4,037
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock issued under stock plans	8	8			11	(3)
Purchase of common stock	(794)	(794)			(794)
Net income (loss) attributable to AIG or noncontrolling interests	2,747	2,027					2,027		720
Dividends on preferred stock and preferred stock redemption premiums	(7)
Dividends on preferred stock	(7)	(7)					(7)
Dividends on common stock	(254)	(254)					(254)
Other comprehensive income (loss)	(4,918)	(3,486)						(3,486)	(1,432)
Net increase (decrease) due to divestitures and acquisitions	(48)	(6)				55		(61)	(42)
Contributions from noncontrolling interests	8								8
Distributions to noncontrolling interests	(65)								(65)
Other	45	42				35	7		3
Balance, end of period at Sep. 30, 2023	43,213	39,984	485	4,766	(58,191)	77,764	37,689	(22,529)	3,229
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	8	8			322	(314)
Redemption of preferred stock	(485)	(485)	(485)
Purchase of common stock	(4,877)	(4,877)			(4,877)
Net income (loss) attributable to AIG or noncontrolling interests	(1,827)	(2,302)					(2,302)		475
Dividends on preferred stock and preferred stock redemption premiums	(22)	(22)					(22)
Dividends on common stock	(758)	(758)					(758)
Other comprehensive income (loss)	7,484	7,778						7,778	(294)
Net increase (decrease) due to divestitures and acquisitions	(5,891)	119				(418)		537	(6,010)
Contributions from noncontrolling interests	28								28
Distributions to noncontrolling interests	(72)								(72)
Other	184	227				232	(5)		(43)
Balance, end of period at Sep. 30, 2024	45,073	45,039	0	4,766	(63,744)	75,310	34,429	(5,722)	34
Balance, beginning of period at Jun. 30, 2024	44,475	44,445	0	4,766	(62,255)	75,274	34,225	(7,565)	30
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock issued under stock plans	25	25			29	(4)
Purchase of common stock	(1,518)	(1,518)			(1,518)
Net income (loss) attributable to AIG or noncontrolling interests	457	459					459		(2)
Dividends on preferred stock and preferred stock redemption premiums	0
Dividends on common stock	(254)	(254)					(254)
Other comprehensive income (loss)	1,847	1,843						1,843	4
Net increase (decrease) due to divestitures and acquisitions	(6)								(6)
Other	47	39				40	(1)		8
Balance, end of period at Sep. 30, 2024	$ 45,073	$ 45,039	$ 0	$ 4,766	$ (63,744)	$ 75,310	$ 34,429	$ (5,722)	$ 34