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Earnings (Loss) Per Share (Tables)
 12 Months Ended
Dec. 31, 2011
Earnings Per Share Reconciliation [Abstract]  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]

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