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Earnings (Loss) Per Share (Notes)
 12 Months Ended
Dec. 31, 2011
Earnings Per Share [Abstract]  
Earnings Per Share [Text Block]
EARNINGS (LOSS) PER SHARE

We calculate basic earnings (loss) per share by dividing the net income (loss) by the weighted average number of common shares outstanding. Shares issuable upon the satisfaction of certain conditions are considered outstanding and included in the computation of basic earnings (loss) per share. Accordingly, the calculation of basic earnings (loss) per share for the years ended December 31, 2011, 2010 and 2009 assumes there was outstanding at the beginning of each of these periods all 386 million shares of Delta common stock contemplated by Delta's Plan of Reorganization to be distributed to holders of allowed general, unsecured claims and nine million shares of Delta common stock reserved for issuance in exchange for shares of Northwest common stock that, but for our merger with Northwest Airlines in 2008, would have been issued under Northwest's Plan of Reorganization. Similarly, the calculation of basic loss per share for the year ended December 31, 2009 assumes there was outstanding at January 1, 2009, 50 million shares of Delta common stock we agreed to issue on behalf of pilots in connection with the merger.

The following table shows our computation of basic and diluted earnings (loss) per share:
 
Year Ended December 31,
(in millions, except per share data)
2011
2010
2009
Net income (loss)
$
854

$
593

$
(1,237
)
 
 
 
 
Basic weighted average shares outstanding
838

834

827

Dilutive effects of share based awards
6

9

—

Diluted weighted average shares outstanding
844

843

827

 
 
 
 
Basic earnings (loss) per share
$
1.02

$
0.71

$
(1.50
)
Diluted earnings (loss) per share
$
1.01

$
0.70

$
(1.50
)
 
 
 
 
Antidilutive common stock equivalents excluded from diluted earnings (loss) per share
17

22

35