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Earnings Per Share
 12 Months Ended
Dec. 31, 2016
Earnings Per Share [Abstract]  
Earnings Per Share EARNINGS PER SHARE

We calculate basic earnings per share by dividing the net income by the weighted average number of common shares outstanding, excluding restricted shares. We calculate diluted earnings per share by dividing net income by the weighted average number of common shares outstanding plus the dilutive effect of outstanding share-based awards, including stock options and restricted stock awards. Antidilutive common stock equivalents excluded from the diluted earnings per share calculation are not material. The following table shows our computation of basic and diluted earnings per share:
 
Year Ended December 31,
(in millions, except per share data)
2016
2015
2014
Net income
$
4,373

$
4,526

$
659

 
 
 
 
Basic weighted average shares outstanding
751

797

836

Dilutive effect of share-based awards
4

7

9

Diluted weighted average shares outstanding
755

804

845

 
 
 
 
Basic earnings per share
$
5.82

$
5.68

$
0.79

Diluted earnings per share
$
5.79

$
5.63

$
0.78