Condensed Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Net income (loss)	$ 228	$ (198)	$ 223	$ (97)
Foreign currency translation adjustment	2	(12)	(3)	(42)
Net change in unrealized gains and losses on derivative financial instruments, net of tax	(31)	(27)	(184)	(42)
Net change in certain retirement plans, net of tax	0	16	0	21
Total other comprehensive income (loss)	(29)	(23)	(187)	(63)
Total comprehensive income (loss)	$ 199	$ (221)	$ 36	$ (160)