Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Net income (loss)	$ (239)	$ (119)	$ (121)
Foreign currency translation adjustment	(16)	(22)	10
Net change in unrealized gains and losses on derivative financial instruments, net of tax	(67)	78	107
Net change in unrealized costs associated with certain retirement plans	27	(18)	22
Total other comprehensive income (loss)	(56)	38	139
Total comprehensive income (loss)	$ (295)	$ (81)	$ 18