Derivative Financial Instruments - Effect of Non-Qualifying Hedge Accounting (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	$ 58	$ (11)	$ 59	$ (48)
Interest rate contracts
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	38	(30)	60	(77)
Foreign exchange contracts
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	(1)	0	(3)	5
Equity contracts
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	19	14	12	7
Credit contracts
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	1	(1)	1	(1)
Fixed maturities
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	(3)	3	(4)	7
Embedded derivatives within reinsurance
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	5	0	(4)	5
Embedded derivatives within reinsurance \| Level 3 \| Measured at fair value on a recurring basis
Derivative Instruments, Gain (Loss) [Line Items]
Gains (losses) from standalone derivatives recognized in Net gains (losses)	0	10	0	11
Managed custody guarantees
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	(1)	2	(1)	1
Stabilizer
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	0	1	$ (2)	$ 5
Stabilizer \| Level 3 \| Measured at fair value on a recurring basis
Derivative Instruments, Gain (Loss) [Line Items]
Gains (losses) from standalone derivatives recognized in Net gains (losses)	$ 0	$ 4