Discontinued Operations Presentation - Schedule of Income Statement Line Items of Discontinued Operations (Details) - USD ($) $ in Millions		3 Months Ended	12 Months Ended
	Jun. 09, 2024	Jun. 30, 2024	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Benefits, losses and expenses:
Income (loss) from discontinued operations, net of income taxes			$ (3,626)	$ 1,137	$ 8,383
Less: Net income (loss) from discontinued operations attributable to noncontrolling interests			478	235	1,046
Net income (loss) from discontinued operations attributable to AIG			(4,104)	902	7,337
Other investments			9,828	6,368
Discontinued Operations
Benefits, losses and expenses:
Loss on disposition of operations, net of tax	$ (4,754)	$ (4,800)
Discontinued Operations | Corebridge Financial Inc
Revenues:
Premiums			2,723	7,690	5,091
Policy fees			1,269	2,797	2,913
Net investment income			5,238	11,146	9,398
Net realized gains (losses)			(923)	(3,530)	6,236
Other income			372	761	816
Total revenues			8,679	18,864	24,454
Benefits, losses and expenses:
Policyholder benefits and losses incurred			3,618	9,362	6,715
Change in the fair value of market risk benefits, net			(350)	2	(960)
Interest credited to policyholder account balances			2,184	4,424	3,746
Amortization of deferred policy acquisition costs			465	1,037	1,013
General operating and other expenses			1,350	3,100	2,962
Interest expense			249	620	522
Net (gain) loss on divestitures and other			(191)	(672)	(71)
Total benefits, losses and expenses			7,325	17,873	13,927
Income (loss) from discontinued operations before income tax expense (benefit) and loss on disposal of discontinued operations			1,354	991	10,527
Income tax expense (benefit)			226	(146)	2,144
Income (loss) from discontinued operations, net of income taxes before loss on disposal of discontinued operations			1,128	1,137	8,383
Loss on disposition of operations, net of tax			(4,754)	0	0
Income (loss) from discontinued operations, net of income taxes			(3,626)	1,137	8,383
Less: Net income (loss) from discontinued operations attributable to noncontrolling interests			478	235	1,046
Net income (loss) from discontinued operations attributable to AIG			$ (4,104)	$ 902	$ 7,337