CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Statement Of Income And Comprehensive Income [Abstract]
Net loss	$ (361)	$ (745)	$ (129)
Other comprehensive income:
Net unrealized holding gains on derivatives		2
Foreign currency translation adjustment	2	(1)
Other comprehensive income	2	1
Comprehensive loss	$ (359)	$ (744)	$ (129)