Condensed Consolidated Statements of Comprehensive Income (unaudited) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Statement of Comprehensive Income [Abstract]
Net income	$ 1,250	$ 851	$ 1,799	$ 2,143
Changes in:
Unrealized net capital gains and losses	2,072	682	715	1,656
Unrealized foreign currency translation adjustments	9	4	(30)	9
Unamortized pension and other postretirement prior service credit	(11)	(11)	(7)	(23)
Other comprehensive income, after-tax	2,070	675	678	1,642
Comprehensive income	$ 3,320	$ 1,526	$ 2,477	$ 3,785