CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (USD $) In Millions, unless otherwise specified	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Loss [Member]
Balance at Dec. 31, 2011	$ 11,427	$ 5,992	$ 46,716	$ (40,489)	$ (792)
Balance (in shares) at Dec. 31, 2011		2,996
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(2,237)			(2,237)
Other Comprehensive Income, Net of Tax	11				11
Stock Issued During Period, Shares, New Issues		3
Stock Issued During Period, Value, New Issues	7	7
Share-based compensation expense	19		19
Balance at Jun. 30, 2012	$ 9,227	$ 5,999	$ 46,735	$ (42,726)	$ (781)
Balance (in shares) at Jun. 30, 2012		2,999