Realized Gain (Loss) (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Fixed maturity AFS securities:
Gross gains		$ 13	$ 630	$ 38
Gross losses		(257)	(408)	(53)
Credit loss benefit (expense)		(42)	(22)	(15)
Intent to sell impairments		0	(1,091)	0
Realized gain (loss) on equity securities		18	(6)	15
Credit loss benefit (expense) on mortgage loans on real estate		(88)	(16)	(3)
Credit loss benefit (expense) on reinsurance-related assets		(20)	(41)	(112)
Realized gain (loss) on the market-to-market on certain instruments		102	(1,298)	37
Indexed product derivative results		458	(232)	74
Derivative results		(438)	(1,830)	901
Realized gain (loss) on sale of subsidiaries/businesses		582	0	0
Other realized gain (loss)		(59)	3	(42)
Total realized gain (loss)		269	(4,311)	840
Fortitude Re
Fixed maturity AFS securities:
Gross gains	$ 335
Loss on embedded derivative		789
Mortgage loans on real estate
Fixed maturity AFS securities:
Realized gain (loss) on the market-to-market on certain instruments		7	(11)	(24)
Equity securities
Fixed maturity AFS securities:
Realized gain (loss) on equity securities		$ 21	$ 3	$ 10