Condensed Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 524	$ 457	$ 2,366	$ (1,827)
Other comprehensive income (loss), net of tax
Change in unrealized appreciation (depreciation) of fixed maturity securities on which allowance for credit losses was taken	0	37	(2)	63
Change in unrealized appreciation (depreciation) of all other investments	547	1,349	1,464	1,074
Change in the discount rates used to measure traditional and limited payment long-duration insurance contracts	5	46	12	(44)
Change in foreign currency translation adjustments	(56)	414	567	104
Change in retirement plan liabilities adjustment	6	1	13	18
Change in other comprehensive income (loss) related to discontinued operations	0	0	0	(945)
Corebridge deconsolidation	0	0	0	7,214
Other comprehensive income	502	1,847	2,054	7,484
Comprehensive income	1,026	2,304	4,420	5,657
Less: Comprehensive income attributable to noncontrolling interests	5	2	6	181
Comprehensive income attributable to AIG	$ 1,021	$ 2,302	$ 4,414	$ 5,476