Condensed Consolidated Statements of Comprehensive Income (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Net income (loss)	$ 133	$ (354)
Foreign currency translation adjustment	(6)	3
Net change in unrealized gains and losses on derivative financial instruments, net of tax	(27)	75
Net change in certain retirement plans	(1)	0
Total other comprehensive income (loss)	(34)	78
Total comprehensive income (loss)	$ 99	$ (276)