Discontinued Operations Presentation - Schedule of Income Statement Line Items of Discontinued Operations (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Jun. 30, 2024	Mar. 31, 2024	Dec. 31, 2024
Benefits, losses and expenses:
Loss from discontinued operations, net of income taxes	$ 0		$ 803
Less: Net income from discontinued operations attributable to noncontrolling interests	0		384
Net loss from discontinued operations attributable to AIG	0		419
Other investments	$ 9,987			$ 9,828
Discontinued Operations
Benefits, losses and expenses:
Loss on disposition of operations, net of tax		$ (4,800)
Discontinued Operations | Corebridge Financial Inc
Revenues:
Premiums			2,295
Policy fees			714
Net investment income			2,924
Net realized losses			(336)
Other income			217
Total revenues			5,814
Benefits, losses and expenses:
Policyholder benefits and losses incurred			2,807
Change in the fair value of market risk benefits, net			(370)
Interest credited to policyholder account balances			1,204
Amortization of deferred policy acquisition costs			266
General operating and other expenses			776
Interest expense			143
Net gain on divestitures and other			(5)
Total benefits, losses and expenses			4,821
Income from discontinued operations before income tax expense and loss on disposal of discontinued operations			993
Income tax expense			190
Income from discontinued operations, net of income taxes before loss on disposal of discontinued operations			803
Loss on disposition of operations, net of tax			0
Loss from discontinued operations, net of income taxes			803
Less: Net income from discontinued operations attributable to noncontrolling interests			384
Net loss from discontinued operations attributable to AIG			$ 419