Investments - Net Realized Capital Gains (Losses) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Proceeds from sale of investments
Proceeds on sales	$ 2,551,000,000	$ 3,356,000,000	$ 3,601,000,000
Debt Securities, Available-for-Sale, Realized Gain	44,000,000	51,000,000	68,000,000
Debt Securities, Available-for-Sale, Realized Loss	32,000,000	47,000,000	76,000,000
Gain (Loss) on Securities [Line Items]
Realized capital gains (losses)	(44,000,000)	(134,000,000)	(429,000,000)
Mortgage loans on real estate
Gain (Loss) on Securities [Line Items]
Realized capital gains (losses)	0	(10,000,000)	0
Fixed maturities
Gain (Loss) on Securities [Line Items]
Realized capital gains (losses)	(4,000,000)	(1,000,000)	(5,000,000)
Other derivatives, net
Gain (Loss) on Securities [Line Items]
Realized capital gains (losses)	2,000,000	0	1,000,000
Standalone derivatives
Gain (Loss) on Securities [Line Items]
Realized capital gains (losses)	4,000,000	(2,000,000)	(5,000,000)
Stabilizer
Gain (Loss) on Securities [Line Items]
Realized capital gains (losses)	(14,000,000)	(1,000,000)	19,000,000
Derivatives
Gain (Loss) on Securities [Line Items]
Realized capital gains (losses)	121,000,000	11,000,000	185,000,000
Fixed maturities, available-for-sale, including securities pledged
Gain (Loss) on Securities [Line Items]
Realized capital gains (losses)	(18,000,000)	(27,000,000)	(22,000,000)
Fixed maturities, at fair value using the fair value option
Gain (Loss) on Securities [Line Items]
Realized capital gains (losses)	(135,000,000)	(100,000,000)	(576,000,000)
Equity Securities [Member]
Gain (Loss) on Securities [Line Items]
Realized capital gains (losses)	$ 0	$ (4,000,000)	$ (26,000,000)