Condensed Consolidated Statements of Comprehensive Loss (Unaudited) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2019	Mar. 31, 2018
Statement of Comprehensive Income [Abstract]
Net loss	$ (148)	$ (37)
Other comprehensive income (loss), before tax:
Change in cumulative translation adjustment	(11)	11
Other comprehensive income (loss), before tax	(11)	11
Expense for taxes	0	0
Other comprehensive income (loss), net of tax	(11)	11
Comprehensive loss	(159)	(26)
Less: Comprehensive loss attributable to non-controlling interest	(11)	(2)
Comprehensive loss attributable to controlling interest	$ (148)	$ (24)

Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

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Amount before tax, after reclassification adjustments of other comprehensive income (loss).

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Amount before tax, after reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature.

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