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EARNINGS PER SHARE
 12 Months Ended
Dec. 31, 2019
Earnings Per Share, Basic and Diluted [Abstract]  
EARNINGS PER SHARE EARNINGS PER SHARE

The computation of basic and diluted earnings per common share is as follows (in millions, except per share data):

 
2019
 
2018
 
2017
Amounts attributable to Quest Diagnostics’ common stockholders:
 

 
 

 
 
Income from continuing operations
$
838

 
$
736

 
$
772

Income from discontinued operations, net of taxes
20

 
—

 
—

Net income attributable to Quest Diagnostics' common stockholders
$
858

 
$
736

 
$
772

 
 
 
 
 
 
Income from continuing operations
$
838

 
$
736

 
$
772

Less: Earnings allocated to participating securities
3

 
3

 
3

Earnings available to Quest Diagnostics’ common stockholders – basic and diluted
$
835

 
$
733

 
$
769

 
 
 
 
 
 
Weighted average common shares outstanding – basic
134

 
136

 
137

Effect of dilutive securities:
 

 
 

 
 
Stock options and performance share units
2

 
3

 
3

Weighted average common shares outstanding – diluted
136

 
139

 
140

 
 
 
 
 
 
Earnings per share attributable to Quest Diagnostics’ common stockholders - basic:
 

 
 

 
 
Income from continuing operations
$
6.21

 
$
5.39

 
$
5.63

Income from discontinued operations
0.15

 
—

 
—

Net income
$
6.36

 
$
5.39

 
$
5.63

 
 
 
 
 
 
Earnings per share attributable to Quest Diagnostics’ common stockholders - diluted:
 
 
 
 
 
Income from continuing operations
$
6.13

 
$
5.29

 
$
5.50

Income from discontinued operations
0.15

 
—

 
—

Net income
$
6.28

 
$
5.29

 
$
5.50

 
 
 
 
 
 
 
 
 
 
 
 


The following securities were not included in the calculation of diluted earnings per share due to their antidilutive effect:
 
2019
 
2018
 
2017
 
 
 
 
 
 
Stock options
3

 
2

 
2