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Earnings Per Share
 6 Months Ended
Jun. 30, 2018
Earnings Per Share [Abstract]  
Earnings Per Share EARNINGS PER SHARE

We calculate basic earnings per share by dividing 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 the computation of basic and diluted earnings per share:
 
Three Months Ended June 30,
 
Six Months Ended June 30,
(in millions, except per share data)
2018
2017
 
2018
2017
Net income
$
1,025

$
1,186

 
$
1,572

$
1,747

 
 
 
 
 
 
Basic weighted average shares outstanding
695

728

 
699

728

Dilutive effect of share-based awards
2

3

 
2

3

Diluted weighted average shares outstanding
697

731

 
701

731

 
 
 
 
 
 
Basic earnings per share
$
1.47

$
1.63

 
$
2.25

$
2.40

Diluted earnings per share
$
1.47

$
1.62

 
$
2.24

$
2.39