Earnings per Share

12 Months Ended

Apr. 30, 2018

Earnings Per Share [Abstract]

Earnings per Share

 NOTE 6  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.

		Year Ended April 30,
		2018			2017			2016
Net income		$	1,338.6		$	592.3		$	688.7
Less: Net income allocated to participating securities		6.8			2.8			3.0
Net income allocated to common stockholders		$	1,331.8		$	589.5		$	685.7
Weighted-average common shares outstanding	113.0			115.5			118.9
Add: Dilutive effect of stock options		—		0.1			0.1
Weighted-average common shares outstanding – assuming dilution	113.0			115.6			119.0
Net income per common share		$	11.79		$	5.11		$	5.77
Net income per common share – assuming dilution		$	11.78		$	5.10		$	5.76