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Earnings Per Share (Tables)
 6 Months Ended
Jun. 30, 2019
Earnings Per Share [Abstract]  
Basic and Diluted Earning per Share The computations of basic and diluted earnings per share are as follows.


 
For the
Three Month
Period Ended
June 30,
    
For the
Six Month
Period Ended
June 30,
  
   
2019
    
2018
    
2019
    
2018
  
Net income
  
$
44.9
    
$
60.3
    
$
92.1
    
$
102.7
  
Average shares outstanding
                                
Basic
    
203.4
      
201.8
      
202.5
      
201.7
  
Diluted
    
208.9
      
209.6
      
208.4
      
209.8
  
Earnings per share
                                
Basic
  
$
0.22
    
$
0.30
    
$
0.45
    
$
0.51
  
Diluted
  
$
0.21
    
$
0.29
    
$
0.44
    
$
0.49