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Earnings (Loss) Per Common Share
 9 Months Ended
Sep. 30, 2019
Earnings Per Share [Abstract]  
Earnings (Loss) Per Common Share EARNINGS (LOSS) PER COMMON SHARE
Basic earnings per common share excludes the dilutive impact of potentially dilutive securities and is computed by dividing net income by the weighted average number of common shares outstanding for the period. Diluted earnings per common share includes the effect of potential dilution from the hypothetical exercise of outstanding stock options and vesting of restricted shares and performance shares. A reconciliation of our basic and diluted earnings per common share is as follows:
 
 
Three Months Ended September 30,
 
Nine Months Ended September 30,
(In millions, except per share data)
 
2019
 
2018
 
2019
 
2018
Net income (loss) to common shareholders
 
$
65.5

 
$
(13.1
)
 
$
207.3

 
$
131.7

Basic weighted average shares outstanding
 
233.9

 
238.7

 
233.8

 
239.9

Diluted weighted average shares outstanding
 
235.5

 
238.7

 
235.8

 
244.2

Earnings (loss) per common share:
 
 
 
 
 
 
 
 
Basic earnings (loss) per share
 
$
0.28

 
$
(0.05
)
 
$
0.89

 
$
0.55

Diluted earnings (loss) per share
 
$
0.28

 
$
(0.05
)
 
$
0.88

 
$
0.54

The number of anti-dilutive shares that have been excluded in the computation of diluted earnings per share for the three and nine months ended September 30, 2019 and 2018 were 2.4 million, 2.8 million, 8.8 million and 2.6 million, respectively.