Consolidated Statements of Comprehensive (Loss) Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Net income	$ 813	$ 899	$ 859
Other Comprehensive (Loss) Income, Net of Tax
Net unrealized gains on investments	(812)	103	255
Foreign currency translation adjustment	(82)	100	(114)
Pension and postretirement benefits	0	2	1
Other comprehensive (loss) income, net of tax	(894)	205	142
Total comprehensive (loss) income	(81)	1,104	1,001
Net unrealized gains on investments with other-than-temporary impairments
Other Comprehensive (Loss) Income, Net of Tax
Net unrealized gains on investments	14	5	(3)
Net unrealized gains on other investments
Other Comprehensive (Loss) Income, Net of Tax
Net unrealized gains on investments	$ (798)	$ 108	$ 252