Investments - Schedule of Changes in Unrealized Appreciation (Depreciation) of Available for Sale Securities and Other Investments (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Equity Securities, FV-NI, Unrealized Gain (Loss) [Abstract]
Net gains (losses) recognized during the period on equity securities and other investments	$ (182)	$ 102	$ 586	$ 378
Less: Net gains (losses) recognized during the period on equity securities and other investments sold during the period	(63)	8	(29)	75
Unrealized gains (losses) recognized during the reporting period on equity securities and other investments still held at the reporting date	(119)	94	615	303
Corebridge Financial Inc
Equity Securities, FV-NI, Unrealized Gain (Loss) [Abstract]
Unrealized gains (losses) recognized during the reporting period on equity securities and other investments still held at the reporting date	(348)	(35)	316	30
Continuing Operations, Excluding Held-For-Sale
Debt Securities, Available-for-sale [Line Items]
Increase (decrease) in unrealized appreciation (depreciation) of investments	543	1,597	1,370	1,441
Fixed maturity securities | Continuing Operations, Excluding Held-For-Sale
Debt Securities, Available-for-sale [Line Items]
Increase (decrease) in unrealized appreciation (depreciation) of investments	543	1,616	1,370	1,499
Other investments | Continuing Operations, Excluding Held-For-Sale
Debt Securities, Available-for-sale [Line Items]
Increase (decrease) in unrealized appreciation (depreciation) of investments	0	(19)	0	(58)
Equities
Equity Securities, FV-NI, Unrealized Gain (Loss) [Abstract]
Net gains (losses) recognized during the period on equity securities and other investments	62	60	85	144
Less: Net gains (losses) recognized during the period on equity securities and other investments sold during the period	2	8	3	51
Unrealized gains (losses) recognized during the reporting period on equity securities and other investments still held at the reporting date	60	52	82	93
Other invested assets
Equity Securities, FV-NI, Unrealized Gain (Loss) [Abstract]
Net gains (losses) recognized during the period on equity securities and other investments	(244)	42	501	234
Less: Net gains (losses) recognized during the period on equity securities and other investments sold during the period	(65)	0	(32)	24
Unrealized gains (losses) recognized during the reporting period on equity securities and other investments still held at the reporting date	$ (179)	$ 42	$ 533	$ 210