Schedule II - Statements of Income (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2024	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Dec. 31, 2023	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Revenues:
Net realized gains (losses)									$ (548)	$ (1,078)	$ 827
Other income									7	6	34
Expenses:
Interest expense									462	516	603
(Gain) loss on extinguishment of debt									14	(37)	303
Net (gain) loss on divestitures and other									(616)	29	153
Income from continuing operations before income tax expense									3,870	2,867	3,772
Income tax expense									1,170	126	882
Net income (loss)	$ 901	$ 457	$ (3,884)	$ 1,600	$ (473)	$ 2,747	$ 1,691	$ (87)	(926)	3,878	11,273
Income (loss) from discontinued operations									(4,104)	902	7,337
Net income (loss) attributable to AIG	$ 898	$ 459	$ (3,977)	$ 1,216	$ 93	$ 2,027	$ 1,493	$ 30	(1,404)	3,643	10,227
Parent Company
Revenues:
Equity in undistributed net income (loss) of consolidated subsidiaries									(957)	(4,313)	1,319
Dividend income from consolidated subsidiaries									4,631	7,312	2,202
Interest income									288	226	936
Net realized gains (losses)									(13)	(74)	(433)
Other income									606	5	22
Expenses:
Interest expense									468	525	631
(Gain) loss on extinguishment of debt									14	(58)	301
Net (gain) loss on divestitures and other									1	5	111
Other expenses									949	778	960
Income from continuing operations before income tax expense									3,123	1,906	2,043
Income tax expense									85	(859)	(838)
Net income (loss)									3,038	2,765	2,881
Income (loss) from discontinued operations									(4,442)	878	7,346
Net income (loss) attributable to AIG									(1,404)	3,643	10,227
Parent Company | Related Party
Expenses:
Interest income									$ 1	$ 1	$ 767