Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 324	$ 363	$ 225
Other comprehensive income (loss), net of income taxes:
Currency translation adjustment			1
Employee benefit plans	4	(3)	(6)
Interest rate derivatives	5	(1)
Other comprehensive income (loss), net of income taxes	9	(4)	(5)
Comprehensive income	$ 333	$ 359	$ 220