CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS (unaudited) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Statement of Comprehensive Income [Abstract]
Net loss	$ (90)	$ (111)	$ (150)	$ (239)
Other comprehensive loss:
Unrealized holding losses on derivatives and marketable securities, net of tax	(4)		(5)
Foreign currency translation adjustment	(4)	1	(4)	(1)
Comprehensive loss	$ (98)	$ (110)	$ (159)	$ (240)