Other Comprehensive Income (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Pre-tax
Other comprehensive income (loss)	$ (1,529)	$ 591	$ (3,574)	$ (1,288)
Tax
Other comprehensive income (loss)	324	(124)	761	274
After-tax
Other comprehensive income (loss)	(1,205)	467	(2,813)	(1,014)
Unrealized net capital gains and losses
Pre-tax
Unrealized net holding gains and losses arising during the period, net of related offsets	(1,771)	706	(3,920)	(1,007)
Less: reclassification adjustment of realized capital gains and losses	(320)	93	(443)	283
Other comprehensive income (loss)	(1,451)	613	(3,477)	(1,290)
Tax
Unrealized net holding gains and losses arising during the period, net of related offsets	375	(149)	834	215
Less: reclassification adjustment of realized capital gains and losses	67	(20)	93	(59)
Other comprehensive income (loss)	308	(129)	741	274
After-tax
Unrealized net holding gains and losses arising during the period, net of related offsets	(1,396)	557	(3,086)	(792)
Less: reclassification adjustment of realized capital gains and losses	(253)	73	(350)	224
Other comprehensive income (loss)	(1,143)	484	(2,736)	(1,016)
Unrealized foreign currency translation adjustments
Pre-tax
Other comprehensive income (loss)	(59)	(4)	(59)	39
Tax
Other comprehensive income (loss)	12	1	12	(8)
After-tax
Other comprehensive income (loss)	(47)	(3)	(47)	31
Unamortized pension and other postretirement prior service credit
Pre-tax
Other comprehensive income (loss)	(19)	(18)	(38)	(37)
Tax
Other comprehensive income (loss)	4	4	8	8
After-tax
Other comprehensive income (loss)	$ (15)	$ (14)	$ (30)	$ (29)