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Lease Obligations (Tables)
 12 Months Ended
Dec. 31, 2011
Leases [Abstract]  
Schedule of Future Minimum Lease Payments for Capital Leases [Table Text Block]
Capital Leases
Years Ending December 31,
(in millions)
Total
2012
$
221

2013
196

2014
168

2015
155

2016
163

Thereafter
323

Total minimum lease payments
1,226

Less: amount of lease payments representing interest
(489
)
Present value of future minimum capital lease payments
737

Plus: unamortized premium, net
(6
)
Less: current obligations under capital leases
(117
)
Long-term capital lease obligations
$
614
Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block]
Operating Leases
Years Ending December 31,
(in millions)
Delta Lease Payments(1)
Contract Carrier Aircraft Lease Payments(2)
Total
2012
$
926

$
536

$
1,462

2013
912

529

1,441

2014
862

518

1,380

2015
765

506

1,271

2016
677

449

1,126

Thereafter
6,660

928

7,588

Total minimum lease payments
$
10,802

$
3,466

$
14,268

 
(1) 
Includes payments accounted for as construction obligations. See Note 4.
(2) 
Represents the minimum lease obligations under our Contract Carrier agreements with ExpressJet Airlines, Inc. (formerly Atlantic Southeast Airlines, Inc.), Chautauqua Airlines, Inc. (“Chautauqua”), Compass, Mesaba, Pinnacle, Shuttle America Corporation (“Shuttle America”) and SkyWest Airlines, Inc.