Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Consolidated Statements of Comprehensive Income (Loss)
Net income (loss)	$ 109	$ (1,250)	$ 60
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustment	15	(19)	7
Unrealized loss on derivatives	(12)	(7)	(3)
Change in pension and other postretirement benefit plans	(26)	(5)	(14)
Other comprehensive loss, net of tax	(23)	(31)	(10)
Comprehensive income (loss), net of tax	$ 86	$ (1,281)	$ 50