Earnings per Share

9 Months Ended

Jan. 31, 2016

Earnings Per Share [Abstract]

Earnings per Share

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 January 31,				Nine Months Ended January 31,
	2016		2015		2016		2015
Net income	$	185.3	$	160.9	$	497.7	$	435.2
Less: Net income allocated to participating securities	0.8		1.0		2.2		2.9
Net income allocated to common stockholders	$	184.5	$	159.9	$	495.5	$	432.3
Weighted-average common shares outstanding	119,167,720		101,190,896		119,138,552		101,114,223
Add: Dilutive effect of stock options	52,585		675		25,356		4,132
Weighted-average common shares outstanding – assuming dilution	119,220,305		101,191,571		119,163,908		101,118,355
Net income per common share	$	1.55	$	1.58	$	4.16	$	4.28
Net income per common share – assuming dilution	$	1.55	$	1.58	$	4.16	$	4.28