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Earnings (Loss) Per Share
 12 Months Ended
Dec. 31, 2019
Earnings Per Share [Abstract]  
Earnings (Loss) Per Share Earnings (Loss) Per Share
Basic EPS amounts are calculated by dividing net income (loss) allocated to common stockholders by the weighted average number of common shares outstanding.  Diluted EPS amounts assume the issuance of common stock for all potentially dilutive common shares outstanding.  
The following table shows the basic and diluted earnings (loss) per share for 2019, 2018, and 2017:
 
For the year ended December 31, 2019
 
Net (Loss)
 
Shares
(in millions)
 
Per Share
Net loss
$
(80.8
)
 
 
 
 
Amount allocated to common stockholders
100
%
 
 

 
 
Basic and Diluted EPS:(1)
$
(80.8
)
 
88.8

 
$
(0.91
)

 
For the year ended December 31, 2018
 
Net (Loss)
 
Shares
(in millions)
 
Per Share
Net loss
$
(66.2
)
 
 
 
 
Amount allocated to common stockholders
100
%
 
 

 
 
Basic and Diluted EPS:(1)
$
(66.2
)
 
87.6

 
$
(0.76
)
 
 
For the year ended December 31, 2017
 
Net Income
 
Shares
(in millions)
 
Per Share
Net income
$
48.6

 
 
 
 
Amount allocated to common stockholders
92
%
 
 

 
 
Basic EPS:
 

 
 

 
 
Net loss allocated to common stockholders
$
44.7

 
87.3

 
$
0.51

Effect of dilutive securities:
 
 
 
 
 
Stock Options
 
 
0.7

 
 
Basic and Diluted EPS:(1)
$
44.7

 
88.0

 
$
0.51




Securities excluded from the calculation of diluted EPS (in millions):
2019(1)
 
2018(1)
 
2017
Share-based compensation
0.3

 
1.4

 
0.6


(1) 
In periods when we report a net loss, all share-based compensation awards are excluded from the calculation of diluted weighted average shares outstanding because of their anti-dilutive effect on earnings (loss) per share.