Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Consolidated Statements of Comprehensive Income (Loss)
Net income (loss)	$ 303	$ 109	$ (1,250)
Other comprehensive loss, net of tax:
Foreign currency translation adjustments	(47)	15	(19)
Reclassification of accumulated other comprehensive loss to gain on disposal of discontinued operations	(68)
Unrealized loss on derivatives	(3)	(12)	(7)
Loss on pension and other postretirement benefit plans	(43)	(26)	(5)
Other comprehensive loss, net of tax	(161)	(23)	(31)
Comprehensive income (loss), net of tax	$ 142	$ 86	$ (1,281)