Consolidated Statement of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Statement of Comprehensive Income [Abstract]
Net income	$ 201	$ 418	$ 387
Other comprehensive loss:
Foreign currency translation adjustments, net of tax	(12)	(27)	(62)
Other comprehensive loss:	(12)	(27)	(62)
Comprehensive income	$ 189	$ 391	$ 325