Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Net income (loss)	$ 347	$ (239)	$ (119)
Foreign currency translation adjustment	(25)	(16)	(22)
Net change in unrealized gains and losses on derivative financial instruments, net of tax	(45)	(67)	78
Net change in available-for-sale securities	(6)	0	0
Net change in unrealized costs associated with certain retirement plans	(11)	27	(18)
Total other comprehensive income (loss)	(87)	(56)	38
Total comprehensive income (loss)	$ 260	$ (295)	$ (81)