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Net Earnings Per Share (Tables)
 3 Months Ended
Mar. 31, 2014
Net Earnings Per Share [Abstract]  
Net Earnings Per Share
The calculation of net earnings per share – basic and net earnings per share – diluted were as follows:

   
3 Months Ended
 
   
March 31,
 
   
2014
   
2013
 
Net earnings per share – basic:
         
 Net earnings available to common shareholders
 
$
70.1
   
$
23.9
 
 Weighted-average common shares outstanding
   
79.8
     
77.1
 
   
$
0.88
   
$
0.31
 
Net earnings per share – diluted:
               
 Net earnings available to common shareholders
 
$
70.1
   
$
23.9
 
 Weighted-average common shares outstanding
   
79.8
     
77.1
 
 Effect of dilutive securities – stock options
   
   0.7
     
   0.6
 
 Effect of other share-based awards
   
0.7
     
0.5
 
     
81.2
     
78.2
 
   
$
0.86
   
$
0.31