Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Net income (loss)	$ 186	$ (147)	$ 527	$ (137)
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustment	2	(11)	(81)	(187)
Net change in derivative financial instruments	(18)	(26)	111	48
Net change in defined benefit pensions and other items	0	0	(1)	0
Total other comprehensive income (loss)	(16)	(37)	30	(139)
Total comprehensive income (loss)	$ 170	$ (185)	$ 558	$ (276)