Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Net income	$ 1,000	$ 813	$ 899
Other Comprehensive Income (Loss), net of tax
Net unrealized gains on investments	948	(812)	103
Foreign currency translation adjustment	39	(82)	100
Pension and postretirement benefits	(58)	0	2
Other comprehensive income (loss), net of tax	929	(894)	205
Total comprehensive income (loss)	1,929	(81)	1,104
Net unrealized gains on investments with other-than-temporary impairments
Other Comprehensive Income (Loss), net of tax
Net unrealized gains on investments	1	14	5
Net unrealized gains on other investments
Other Comprehensive Income (Loss), net of tax
Net unrealized gains on investments	$ 949	$ (798)	$ 108