Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Pre-tax
Other comprehensive (loss) income	$ (301)	$ (1,423)	$ 612	$ (3,348)
Tax
Other comprehensive (loss) income	60	302	(134)	713
After-tax
Other comprehensive (loss) income, after-tax	(241)	(1,121)	478	(2,635)
Unrealized net capital gains and losses
Pre-tax
Unrealized net holding gains and losses arising during the period, net of related offsets	(472)	(1,773)	257	(3,922)
Less: reclassification adjustment of realized capital gains and losses	(131)	(320)	(269)	(443)
Other comprehensive (loss) income	(341)	(1,453)	526	(3,479)
Tax
Unrealized net holding gains and losses arising during the period, net of related offsets	96	376	(60)	834
Less: reclassification adjustment of realized capital gains and losses	27	67	56	93
Other comprehensive (loss) income	69	309	(116)	741
After-tax
Unrealized net holding gains and losses arising during the period, net of related offsets	(376)	(1,397)	197	(3,088)
Less: reclassification adjustment of realized capital gains and losses	(104)	(253)	(213)	(350)
Other comprehensive (loss) income, after-tax	(272)	(1,144)	410	(2,738)
Unrealized foreign currency translation adjustments
Pre-tax
Other comprehensive (loss) income	36	(59)	99	(59)
Tax
Other comprehensive (loss) income	(8)	12	(21)	12
After-tax
Other comprehensive (loss) income, after-tax	28	(47)	78	(47)
Unamortized pension and other postretirement prior service credit
Pre-tax
Other comprehensive (loss) income	(6)	(19)	(12)	(38)
Tax
Other comprehensive (loss) income	1	4	3	8
After-tax
Other comprehensive (loss) income, after-tax	(5)	(15)	(9)	(30)
Discount rate for reserve for future policy benefits
Pre-tax
Other comprehensive (loss) income	10	108	(1)	228
Tax
Other comprehensive (loss) income	(2)	(23)	0	(48)
After-tax
Other comprehensive (loss) income, after-tax	$ 8	$ 85	$ (1)	$ 180