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Earnings per Share
3 Months Ended
Jul. 31, 2019
Earnings Per Share [Abstract]  
Earnings per Share
The following table sets forth the computation of net income per common share and net income per common share – assuming dilution under the two-class method.
 
Three Months Ended July 31,
 
2019
 
2018
Net income
$
154.6

 
$
133.0

Less: Net income allocated to participating securities
0.8

 
0.7

Net income allocated to common stockholders
$
153.8

 
$
132.3

Weighted-average common shares outstanding
113.2

 
113.1

Add: Dilutive effect of stock options
0.1

 

Weighted-average common shares outstanding – assuming dilution
113.3

 
113.1

Net income per common share
$
1.36

 
$
1.17

Net income per common share – assuming dilution
$
1.36

 
$
1.17