Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Pre-tax
Other comprehensive income (loss)	$ 913	$ (1,925)
Tax
Other comprehensive income (loss)	(194)	411
After-tax
Other comprehensive income (loss), after-tax	719	(1,514)
Unrealized net capital gains and losses
Pre-tax
Unrealized net holding gains and losses arising during the period, net of related offsets	729	(2,149)
Less: reclassification adjustment of realized capital gains and losses	(138)	(123)
Other comprehensive income (loss)	867	(2,026)
Tax
Unrealized net holding gains and losses arising during the period, net of related offsets	(156)	458
Less: reclassification adjustment of realized capital gains and losses	29	26
Other comprehensive income (loss)	(185)	432
After-tax
Unrealized net holding gains and losses arising during the period, net of related offsets	573	(1,691)
Less: reclassification adjustment of realized capital gains and losses	(109)	(97)
Other comprehensive income (loss), after-tax	682	(1,594)
Unrealized foreign currency translation adjustments
Pre-tax
Other comprehensive income (loss)	63	0
Tax
Other comprehensive income (loss)	(13)	0
After-tax
Other comprehensive income (loss), after-tax	50	0
Unamortized pension and other postretirement prior service credit
Pre-tax
Other comprehensive income (loss)	(6)	(19)
Tax
Other comprehensive income (loss)	2	4
After-tax
Other comprehensive income (loss), after-tax	(4)	(15)
Discount rate for reserve for future policy benefits
Pre-tax
Other comprehensive income (loss)	(11)	120
Tax
Other comprehensive income (loss)	2	(25)
After-tax
Other comprehensive income (loss), after-tax	$ (9)	$ 95