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COMMITMENTS (TABLES)
 3 Months Ended
Mar. 31, 2013
Commitments and Contingencies Disclosure [Abstract]  
Schedule of Future Minimum Rental Payments for Operating Leases and Unrecorded Unconditional Purchase Obligtaions [Table Text Block]
Future minimum fixed payments for commitments (in millions):
March 31, 2013
Aircraft Leases
 
Facility Leases
 
Aircraft Commitments
 
Capacity Purchase Agreements
 
Engine Maintenance
Remainder of 2013
$
57

 
$
45

 
$
293

 
$
28

 
$
24

2014
126

 
42

 
403

 
38

 
25

2015
105

 
31

 
259

 
31

 
9

2016
82

 
23

 
221

 
18

 
—

2017
51

 
19

 
329

 
19

 
—

Thereafter
79

 
130

 
1,461

 
8

 
—

Total
$
500

 
$
290

 
$
2,966

 
$
142

 
$
58