Condensed Consolidated Statements of Comprehensive Loss (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Statement of Comprehensive Income [Abstract]
Net loss	$ (72)	$ (36)	$ (175)	$ (88)
Other comprehensive income (loss), before tax:
Change in cumulative translation adjustment	(2)	6	(6)	21
Net change in cash flow hedges	0	(4)	1	(10)
Pension liability	(1)	0	(2)	0
Other comprehensive income (loss), before tax	(3)	2	(7)	11
Expense for taxes	0	0	0	0
Other comprehensive income (loss), net of tax	(3)	2	(7)	11
Comprehensive loss	(75)	(34)	(182)	(77)
Less: Comprehensive loss attributable to non-controlling interest	(9)	(2)	(16)	(4)
Comprehensive loss attributable to controlling interest	$ (66)	$ (32)	$ (166)	$ (73)