Derivatives (Fair Value Hedges) (Details) - Designated as Hedging Instrument [Member] - USD ($)	Mar. 31, 2023	Dec. 31, 2022
Fixed maturity securities AFS
Derivative Instruments, Gain (Loss) [Line Items]
Hedged Asset, Discontinued Fair Value Hedge, Cumulative Increase (Decrease)	$ (130,000,000)	$ (136,000,000)
Debt Instruments, Carrying Amount	882,000,000	1,411,000,000
Hedged Asset, Fair Value Hedge, Cumulative Increase (Decrease)	1,000,000	1,000,000
Mortgages [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Debt Instruments, Carrying Amount	355,000,000	331,000,000
Hedged Asset, Fair Value Hedge, Cumulative Increase (Decrease)	(17,000,000)	(19,000,000)
Future policy benefits [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Debt Instruments, Carrying Amount	2,982,000,000	2,816,000,000
Hedged Asset, Fair Value Hedge, Cumulative Increase (Decrease)	78,000,000	199,000,000
Policyholder Account Balances [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Debt Instruments, Carrying Amount	1,865,000,000	1,789,000,000
Hedged Asset, Fair Value Hedge, Cumulative Increase (Decrease)	$ 41,000,000	$ 104,000,000