Condensed Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Net income (loss)	$ 11	$ 424
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustment	(177)	6
Net change in derivative financial instruments	75	49
Net change in defined benefit pensions and other items	0	(1)
Total other comprehensive income (loss)	(101)	54
Total comprehensive income (loss)	$ (91)	$ 479