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
Net income (loss)	$ 419	$ (155)	$ 946	$ (292)
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustment	(49)	84	(130)	(104)
Net change in derivative financial instruments	50	(64)	161	(15)
Net change in defined benefit pensions and other items	0	0	1	0
Total other comprehensive income (loss)	1	20	31	(119)
Total comprehensive income (loss)	$ 420	$ (135)	$ 978	$ (411)