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Earnings Per Share
 9 Months Ended
Sep. 30, 2019
Earnings Per Share [Abstract]  
Earnings Per Share Earnings Per Share

Basic earnings per share has been computed based upon the weighted average number of common shares outstanding. Diluted loss per share has been computed based upon the weighted average number of common shares outstanding plus the effect of all potentially dilutive common stock equivalents, except when the effect would be anti-dilutive.

The following table sets forth the computation of basic and diluted earnings per share (in millions, except per share data).
 
Three Months Ended September 30,
 
Nine Months Ended September 30,
 
2019
 
2018
 
2019
 
2018
Basic and diluted earnings per share:
 
 
 
 
 
 
 
Numerator:
 
 
 
 
 
 
 
Net income, basic and diluted
$
9.4

 
$
46.2

 
$
12.4

 
$
35.8

Denominator:
 
 
 
 
 
 
 
Basic weighted average common shares
28.7

 
28.5

 
28.7

 
28.4

Stock options, RSUs and PSUs
0.4

 
0.4

 
0.4

 
0.5

Weighted average shares used to calculate diluted earnings (loss) per share
29.1

 
28.9

 
29.1

 
28.9

Earnings per share:
 
 
 
 
 
 
 
Basic
$
0.33

 
$
1.62

 
$
0.43

 
$
1.26

Diluted
$
0.32

 
$
1.60

 
$
0.43

 
$
1.24

Antidilutive stock options, RSUs and PSUs
0.2

 
0.2

 
0.3

 
0.2