Consolidated Statements of Comprehensive Income (Loss) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Net (loss) income	$ (121)	$ (4,068)	$ 441
Foreign currency translation adjustment	10	32	(8)
Net change in unrealized gains and losses on derivative financial instruments, net of tax	107	82	17
Net change in certain retirement plans	22	(9)	(18)
Total other comprehensive income (loss)	139	105	(9)
Total comprehensive income (loss)	$ 18	$ (3,963)	$ 432