Other Comprehensive Income (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Pre-tax
Other comprehensive income (loss)	$ (2,045)	$ (1,879)
Tax
Other comprehensive income (loss)	437	398
After-tax
Other comprehensive income (loss)	(1,608)	(1,481)
Unrealized net capital gains and losses
Pre-tax
Unrealized net holding gains and losses arising during the period, net of related offsets	(2,149)	(1,718)
Less: reclassification adjustment of realized capital gains and losses	(123)	185
Other comprehensive income (loss)	(2,026)	(1,903)
Tax
Unrealized net holding gains and losses arising during the period, net of related offsets	459	364
Less: reclassification adjustment of realized capital gains and losses	26	(39)
Other comprehensive income (loss)	433	403
After-tax
Unrealized net holding gains and losses arising during the period, net of related offsets	(1,690)	(1,354)
Less: reclassification adjustment of realized capital gains and losses	(97)	146
Other comprehensive income (loss)	(1,593)	(1,500)
Unrealized foreign currency translation adjustments
Pre-tax
Other comprehensive income (loss)	0	43
Tax
Other comprehensive income (loss)	0	(9)
After-tax
Other comprehensive income (loss)	0	34
Unamortized pension and other postretirement prior service credit
Pre-tax
Other comprehensive income (loss)	(19)	(19)
Tax
Other comprehensive income (loss)	4	4
After-tax
Other comprehensive income (loss)	$ (15)	$ (15)