Discontinued Operations Presentation - Schedule of Income Statement Line Items of Discontinued Operations (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024	Dec. 31, 2024
Benefits, losses and expenses:
Loss from discontinued operations, net of income taxes	$ 0	$ (24)	$ 0	$ (3,580)
Less: Net income from discontinued operations attributable to noncontrolling interests	0	(2)	0	475
Net loss from discontinued operations attributable to AIG	0	(22)	0	(4,055)
Other investments	$ 8,361		$ 8,361		$ 9,828
Discontinued Operations
Benefits, losses and expenses:
Loss on disposition of operations, net of tax		(4,700)
Discontinued Operations | Corebridge Financial Inc
Revenues:
Premiums		0		2,723
Policy fees		0		1,269
Net investment income		0		5,238
Net realized losses		0		(923)
Other income		0		372
Total revenues		0		8,679
Benefits, losses and expenses:
Policyholder benefits and losses incurred		0		3,618
Change in the fair value of market risk benefits, net		0		(350)
Interest credited to policyholder account balances		0		2,184
Amortization of deferred policy acquisition costs		0		465
General operating and other expenses		0		1,350
Interest expense		0		249
Net gain on divestitures and other		0		(191)
Total benefits, losses and expenses		0		7,325
Income from discontinued operations before income tax expense and loss on disposal of discontinued operations		0		1,354
Income tax expense		0		226
Income from discontinued operations, net of income taxes before loss on disposal of discontinued operations		0		1,128
Loss on disposition of operations, net of tax		(24)		(4,708)
Loss from discontinued operations, net of income taxes		(24)		(3,580)
Less: Net income from discontinued operations attributable to noncontrolling interests		(2)		475
Net loss from discontinued operations attributable to AIG		$ (22)		$ (4,055)