Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 74	$ 26
Other comprehensive income (loss), net of income taxes:
Currency translation adjustment		(2)
Interest rate derivatives	3
Other comprehensive income (loss), net of income taxes	3	(2)
Comprehensive income	$ 77	$ 24