Held-For-Sale Classification and Discontinued Operations Presentation - Schedule of Income Statement Line Items of Discontinued Operations (Details) - USD ($) $ in Millions		3 Months Ended			9 Months Ended
	Jun. 09, 2024	Sep. 30, 2024	Jun. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Benefits, losses and expenses:
Income (loss) from discontinued operations, net of income taxes		$ (24)		$ 2,046	$ (3,580)	$ 2,472
Less: Net income (loss) from discontinued operations attributable to noncontrolling interests		(2)		720	475	801
Net income (loss) from discontinued operations attributable to AIG		(22)		1,326	(4,055)	1,671
Other investments		14,440			14,440		$ 6,368
Discontinued Operations
Benefits, losses and expenses:
Loss on disposition of operations, net of tax	$ (4,684)		$ (4,700)
Discontinued Operations | Corebridge Financial Inc
Revenues:
Premiums		0		701	2,723	5,249
Policy fees		0		702	1,269	2,094
Net investment income		0		2,705	5,238	8,125
Net realized gains (losses)		0		1,216	(923)	(464)
Other income		0		186	372	561
Total revenues		0		5,510	8,679	15,565
Benefits, losses and expenses:
Policyholder benefits and losses incurred		0		1,106	3,618	6,478
Change in the fair value of market risk benefits, net		0		(418)	(350)	(484)
Interest credited to policyholder account balances		0		1,135	2,184	3,237
Amortization of deferred policy acquisition costs		0		268	465	779
General operating and other expenses		0		805	1,350	2,317
Interest expense		0		143	249	474
Net (gain) loss on divestitures and other		0		2	(191)	(52)
Total benefits, losses and expenses		0		3,041	7,325	12,749
Income (loss) from discontinued operations before income tax expense (benefit) and loss on disposal of discontinued operations		0		2,469	1,354	2,816
Income tax expense (benefit)		0		420	226	341
Income (loss) from discontinued operations, net of income taxes before loss on disposal of discontinued operations		0		2,049	1,128	2,475
Loss on disposition of operations, net of tax		(24)		(3)	(4,708)	(3)
Income (loss) from discontinued operations, net of income taxes		(24)		2,046	(3,580)	2,472
Less: Net income (loss) from discontinued operations attributable to noncontrolling interests		(2)		720	475	801
Net income (loss) from discontinued operations attributable to AIG		$ (22)		$ 1,326	$ (4,055)	$ 1,671