Condensed Consolidated Statements of Comprehensive Loss (Unaudited) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Statement of Comprehensive Income [Abstract]
Net loss	$ (100)	$ (90)	$ (205)	$ (321)
Other comprehensive loss, before tax:
Change in cumulative translation adjustment	5	18	(10)	(3)
Pension liability	0	0	0	1
Other comprehensive income (loss), before tax	5	18	(10)	(2)
Other comprehensive income (loss), net of tax	5	18	(10)	(2)
Comprehensive loss	(95)	(72)	(215)	(323)
Less: Comprehensive income attributable to non-controlling interest	0	0	0	1
Comprehensive loss attributable to controlling interest	$ (95)	$ (72)	$ (215)	$ (324)