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Geograhic Information (Tables)
 12 Months Ended
Dec. 31, 2011
Segment Reporting [Abstract]  
Operating Revenue by Geographic Region [Table Text Block]
Our operating revenue by geographic region (as defined by the DOT) is summarized in the following table:
 
Year Ended December 31,
(in millions)
2011
2010
2009
Domestic
$
22,649

$
20,744

$
19,043

Atlantic
6,499

5,931

4,970

Pacific
3,943

3,283

2,485

Latin America
2,024

1,797

1,565

Total
$
35,115

$
31,755

$
28,063