Condensed Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Net income (loss)	$ 424	$ 298
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustment	6	10
Net change in derivative financial instruments	49	(80)
Net change in defined benefit pensions and other items	(1)	0
Total other comprehensive income (loss)	54	(69)
Total comprehensive income (loss)	$ 479	$ 228