Investments (Net Unrealized Investment Gains (Losses)) (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Components of net unrealized investment gains (losses) included in accumulated other comprehensive loss
Fixed maturity securities	$ (8,632)	$ 8,251	$ 11,818
Derivatives	628	320	162
Other	(7)	(27)	(16)
Subtotal	(8,011)	8,544	11,964
Amounts allocated from: Future policy benefits	964	(3,210)	(4,598)
Amounts allocated from: DAC, VOBA and DSI	392	(387)	(494)
Subtotal	1,356	(3,597)	(5,092)
Deferred income tax benefit (expense)	1,398	(1,039)	(1,443)
Net unrealized investment gains (losses)	$ (5,257)	$ 3,908	$ 5,429