Condensed Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2021	Mar. 31, 2020
Statement Of Income And Comprehensive Income [Abstract]
Net income (loss)		$ (80)	$ (16)
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments, net of tax	[1]	(12)	(17)
Total other comprehensive income (loss), net of tax		(12)	(17)
Comprehensive income (loss)		$ (92)	$ (33)

[1] Deferred income tax liabilities related to these amounts are not material.