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Customer Financing (Customer Financing Carrying Values Related To Major Aircraft Concentrations) (Details) (USD $)
In Millions, unless otherwise specified
Jun. 30, 2012
Dec. 31, 2011
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Operating leases $ 1,884 $ 1,991
717 Aircraft [Member]
   
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Customer financing carrying value 1,855 [1] 1,906 [1]
Operating leases 474 480
757 Aircraft [Member]
   
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Customer financing carrying value 606 [1] 631 [1]
Operating leases 476 451
MD-80 Aircraft [Member]
   
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Customer financing carrying value 460 [1],[2] 485 [1],[2]
Operating leases 0 0
737 Aircraft [Member]
   
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Customer financing carrying value 361 394
Operating leases 224 242
MD-11 Aircraft [Member]
   
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Customer financing carrying value 300 [1] 321 [1]
Operating leases 300 321
767 Aircraft [Member]
   
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Customer financing carrying value 265 307
Operating leases $ 98 $ 103
[1] Out-of-production aircraft
[2] Disclosure omitted from 2011 financial statements