Condensed Consolidated Statement of Equity (Deficit) - 6 months ended Jun. 30, 2017 - USD ($) $ in Millions	Total	Common Stock [Member]	Paid-in Capital [Member]	Treasury Stock [Member]	Accumulated Other Comprehensive Income [Member]	Accumulated Deficit [Member]	Parent [Member]	Noncontrolling Interest [Member]
Balance at Dec. 31, 2016	$ (2,539)	$ 1	$ 526	$ (296)	$ (39)	$ (2,730)	$ (2,538)	$ (1)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(76)	0	0	0	0	(76)	(76)	0
Other comprehensive income	15	0	0	0	15	0	15	0
Balance at Jun. 30, 2017	$ (2,600)	$ 1	$ 526	$ (296)	$ (24)	$ (2,806)	$ (2,599)	$ (1)