CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Statement of Comprehensive Income [Abstract]
Net income	$ 42	$ 46	$ 99	$ 113
Other comprehensive (loss) income:
Unrealized investment (loss) gain	(3)	2	10	1
Less: effect of income taxes	(2)	0	3	0
Other comprehensive (loss) income, net of tax	(1)	2	7	1
Comprehensive income	$ 41	$ 48	$ 106	$ 114