Condensed Consolidated Statements of Comprehensive Loss (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Statement of Comprehensive Income [Abstract]
Net loss	$ (132)	$ (139)	$ (453)	$ (429)
Other comprehensive loss, before tax:
Change in cumulative translation adjustment	15	(27)	15	(40)
Other comprehensive income (loss), before tax	15	(27)	15	(40)
Other comprehensive income (loss), net of tax	15	(27)	15	(40)
Comprehensive loss	(117)	(166)	(438)	(469)
Less: Comprehensive income (loss) attributable to non-controlling interest	0	(7)	2	(26)
Comprehensive loss attributable to controlling interest	$ (117)	$ (159)	$ (440)	$ (443)