CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 220	$ 100	$ 631	$ (103)
Other comprehensive income (loss):
Foreign currency translation adjustments	(138)	163	(197)	(87)
Derivative instrument adjustments and other, net of tax	0	(1)	0	2
Total other comprehensive (loss) income, net of tax	(138)	162	(197)	(85)
Comprehensive income (loss)	$ 82	$ 262	$ 434	$ (188)