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Chapter 11 Reorganization (Schedule Of Liabilities Subject To Compromise) (Details) (USD $)
In Millions, unless otherwise specified
Mar. 31, 2013
Dec. 31, 2012
Reorganizations [Abstract]    
Liabilities Subject to Compromise, Debt and Accrued Interest $ 358 $ 358
Aircraft lease and facility bond related obligations 3,874 3,716
Pension and postretirement benefits 1,237 1,250
Accounts payable and other accrued liabilities 314 370
Other 0 0
Total liabilities subject to compromise $ 5,783 $ 5,694