Other Comprehensive Income (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Pre-tax
Other comprehensive (loss) income	$ (3,360)	$ 1,720	$ 2,322
Tax
Other comprehensive (loss) income	711	(366)	(490)
After-tax
Other comprehensive (loss) income	(2,649)	1,354	1,832
Discontinued Operations, Held-for-sale
After-tax
Total investments	32,055	34,697
Unrealized net capital gains and losses
Pre-tax
Unrealized net holding gains and losses arising during the period, net of related offsets	(2,839)	2,512	2,807
Less: reclassification adjustment of net gains and losses on investments and derivatives	436	870	413
Other comprehensive (loss) income	(3,275)	1,642	2,394
Tax
Unrealized net holding gains and losses arising during the period, net of related offsets	601	(532)	(592)
Less: reclassification adjustment of net gains and losses on investments and derivatives	(92)	(183)	(87)
Other comprehensive (loss) income	693	(349)	(505)
After-tax
Unrealized net holding gains and losses arising during the period, net of related offsets	(2,238)	1,980	2,215
Less: reclassification adjustment of net gains and losses on investments and derivatives	344	687	326
Other comprehensive (loss) income	(2,582)	1,293	1,889
Unrealized net capital gains and losses | Discontinued Operations, Held-for-sale
After-tax
Total investments	2,400
Unrealized foreign currency translation adjustments
Pre-tax
Other comprehensive (loss) income	(10)	66	(13)
Tax
Other comprehensive (loss) income	2	(14)	3
After-tax
Other comprehensive (loss) income	(8)	52	(10)
Unamortized pension and other postretirement prior service credit
Pre-tax
Other comprehensive (loss) income	(75)	12	(59)
Tax
Other comprehensive (loss) income	16	(3)	12
After-tax
Other comprehensive (loss) income	$ (59)	$ 9	$ (47)