Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Pre-tax
Other comprehensive income (loss)	$ (1,123)	$ (472)	$ (4,697)	$ (1,760)
Tax
Other comprehensive income (loss)	238	100	999	374
After-tax
Other comprehensive loss, after-tax	(885)	(372)	(3,698)	(1,386)
Unrealized net capital gains and losses
Pre-tax
Unrealized net holding gains and losses arising during the period, net of related offsets	(1,161)	(343)	(5,081)	(1,350)
Less: reclassification adjustment of realized capital gains and losses	(159)	84	(602)	367
Other comprehensive income (loss)	(1,002)	(427)	(4,479)	(1,717)
Tax
Unrealized net holding gains and losses arising during the period, net of related offsets	246	73	1,080	288
Less: reclassification adjustment of realized capital gains and losses	33	(18)	126	(77)
Other comprehensive income (loss)	213	91	954	365
After-tax
Unrealized net holding gains and losses arising during the period, net of related offsets	(915)	(270)	(4,001)	(1,062)
Less: reclassification adjustment of realized capital gains and losses	(126)	66	(476)	290
Other comprehensive loss, after-tax	(789)	(336)	(3,525)	(1,352)
Unrealized foreign currency translation adjustments
Pre-tax
Other comprehensive income (loss)	(112)	(26)	(171)	13
Tax
Other comprehensive income (loss)	24	5	36	(3)
After-tax
Other comprehensive loss, after-tax	(88)	(21)	(135)	10
Unamortized pension and other postretirement prior service credit
Pre-tax
Other comprehensive income (loss)	(9)	(19)	(47)	(56)
Tax
Other comprehensive income (loss)	1	4	9	12
After-tax
Other comprehensive loss, after-tax	$ (8)	$ (15)	$ (38)	$ (44)