CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME/(LOSS) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Statement of Comprehensive Income [Abstract]
Net Income	$ 72	$ 263	$ 42	$ 248
Other Comprehensive Income, net of tax of $0:
Defined benefit plans	0	0	0	0
Other comprehensive income	0	0	0	0
Comprehensive Income	$ 72	$ 263	$ 42	$ 248