Consolidated Statements of Comprehensive Income - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Statement Of Income And Comprehensive Income [Abstract]
Net income (loss)		$ 113	$ (19)	$ 120
Other comprehensive income (loss):
Foreign currency translation adjustments	[1]	(20)	35	(14)
Total other comprehensive income (loss)		(20)	35	(14)
Comprehensive income		$ 93	$ 16	$ 106

[1] Foreign currency translation adjustments exclude income taxes due to our intention to indefinitely reinvest the earnings of our foreign subsidiaries in those operations. Refer to “Note 16: Stockholders’ Equity”.