Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Statement of Comprehensive Income [Abstract]
Net income	$ 249	$ 273
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Change in net unrealized gain on fixed maturities	(925)	(1,057)
Change in unrealized losses on fixed maturities for which an allowance for credit losses has been recorded	0	1
Changes in net gain on cash flow hedging instruments	5	44
Change in foreign currency translation adjustments	1	(8)
Changes in pension and other postretirement plan adjustments	(13)	(11)
Other comprehensive loss, net of tax	(906)	(1,009)
Comprehensive loss	$ (657)	$ (736)