Condensed Consolidated Statements of Comprehensive Income (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Net (loss) income	$ (3,578)	$ 146	$ (3,465)	$ 192
Foreign currency transaction adjustment	(19)	18	7	46
Net change in unrealized gain and losses on derivative financial instruments, net of tax	11	(22)	44	(40)
Total other comprehensive (loss) income	(8)	(4)	51	6
Total comprehensive (loss) income	$ (3,586)	$ 142	$ (3,414)	$ 198