Investments (excluding Consolidated Investment Entities) - Net Gains (Losses) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Realized Gain/(Losses) [Line Items]
Net gains (losses)	$ (41)	$ (4)	$ (75)	$ 39
Fixed maturities
Realized Gain/(Losses) [Line Items]
Net gains (losses)	3	(1)	7	(2)
Other derivatives, net
Realized Gain/(Losses) [Line Items]
Net gains (losses)	0	(1)	0	0
Standalone derivatives
Realized Gain/(Losses) [Line Items]
Net gains (losses)	10	0	11	1
Managed Custody Guarantees
Realized Gain/(Losses) [Line Items]
Net gains (losses)	2	(1)	1	0
Managed custody guarantees
Realized Gain/(Losses) [Line Items]
Net gains (losses)	1	(1)	5	(1)
Derivatives
Realized Gain/(Losses) [Line Items]
Net gains (losses)	(26)	40	(79)	176
Mortgage loans on real estate
Realized Gain/(Losses) [Line Items]
Net gains (losses)	2	2	(4)	3
Other investments
Realized Gain/(Losses) [Line Items]
Net gains (losses)	(9)	1	(14)	3
Fixed maturities, available-for-sale, including securities pledged
Realized Gain/(Losses) [Line Items]
Net gains (losses)	(25)	(14)	(24)	(34)
Fixed maturities, at fair value option
Realized Gain/(Losses) [Line Items]
Net gains (losses)	0	(30)	20	(111)
Equity securities, at fair value
Realized Gain/(Losses) [Line Items]
Net gains (losses)	$ 1	$ 1	$ 2	$ 4