Earnings per Share

9 Months Ended

Jan. 31, 2014

Earnings Per Share [Abstract]

Earnings per Share

Note 8: 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,
	2014		2013		2014		2013
Net income	$	166.7	$	154.2	$	446.7	$	413.9
Net income allocated to participating securities		1.2		1.4		3.5		3.6
Net income allocated to common stockholders	$	165.5	$	152.8	$	443.2	$	410.3
Weighted-average common shares outstanding		103,980,819		107,528,722		104,456,496		108,405,604
Dilutive effect of stock options		13,623		19,655		15,210		25,263
Weighted-average common shares outstanding – assuming dilution		103,994,442		107,548,377		104,471,706		108,430,867
Net income per common share	$	1.59	$	1.42	$	4.24	$	3.78
Net income per common share – assuming dilution	$	1.59	$	1.42	$	4.24	$	3.78