Derivatives (Fair Value Hedges) (Details) - Designated as Hedging Instrument [Member] - USD ($)	Mar. 31, 2022	Dec. 31, 2021
Fixed maturity securities AFS
Derivative Instruments, Gain (Loss) [Line Items]
Hedged Asset, Discontinued Fair Value Hedge, Cumulative Increase (Decrease)	$ (154,000,000)	$ (161,000,000)
Debt Instruments, Carrying Amount	1,941,000,000	2,164,000,000
Hedged Asset, Fair Value Hedge, Cumulative Increase (Decrease)	0	(1,000,000)
Mortgages [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Debt Instruments, Carrying Amount	530,000,000	634,000,000
Hedged Asset, Fair Value Hedge, Cumulative Increase (Decrease)	(3,000,000)	3,000,000
Future policy benefits [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Debt Instruments, Carrying Amount	(4,423,000,000)	(4,735,000,000)
Hedged Asset, Fair Value Hedge, Cumulative Increase (Decrease)	$ (434,000,000)	$ (877,000,000)