Consolidated Statements of Comprehensive Loss - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Statement of Comprehensive Income [Abstract]
Net loss	$ (294,000,000)	$ (344,000,000)	$ (60,000,000)
Other comprehensive (loss) income, before tax:
Change in cumulative translation adjustment	(9,000,000)	30,000,000	(17,000,000)
Net change in cash flow hedges	1,000,000	(9,000,000)	8,000,000
Pension liability	(4,000,000)	0	(4,000,000)
Other comprehensive (loss) income, before tax	(12,000,000)	21,000,000	(13,000,000)
Income /(expense) for taxes	1,000,000	0	(1,000,000)
Other comprehensive (loss) income, net of tax	(10,000,000)	21,000,000	(14,000,000)
Comprehensive loss	(304,000,000)	(323,000,000)	(74,000,000)
Less: Comprehensive loss attributable to non-controlling interest	(19,000,000)	(127,000,000)	(7,000,000)
Comprehensive loss attributable to controlling interest	$ (285,000,000)	$ (196,000,000)	$ (67,000,000)