Investments (Net Unrealized Investment Gains (Losses)) (Details) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Investments, Debt and Equity Securities [Abstract]
Fixed maturity securities	$ 1,266	$ 8,251
Derivatives	338	320
Other	(10)	(27)
Subtotal	1,594	8,544
Amounts allocated from: Future policy benefits	(1,102)	(3,210)
Amounts allocated from: DAC, VOBA and DSI	(81)	(387)
Subtotal	(1,183)	(3,597)
Deferred income tax benefit (expense)	(86)	(1,039)
Net unrealized investment gains (losses)	$ 325	$ 3,908