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Earnings Per Share (Notes)
 12 Months Ended
Dec. 31, 2012
Earnings Per Share [Abstract]  
Earnings Per Share [Text Block]
EARNINGS PER SHARE

We calculate basic earnings per share by dividing the net income 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 per share.

The following table shows our computation of basic and diluted earnings per share:
 
Year Ended December 31,
(in millions, except per share data)
2012
2011
2010
Net income
$
1,009

$
854

$
593

 
 
 
 
Basic weighted average shares outstanding
845

838

834

Dilutive effects of share based awards
5

6

9

Diluted weighted average shares outstanding
850

844

843

 
 
 
 
Basic earnings per share
$
1.20

$
1.02

$
0.71

Diluted earnings per share
$
1.19

$
1.01

$
0.70

 
 
 
 
Antidilutive common stock equivalents excluded from diluted earnings per share
18

17

22