Stock-Based Compensation

3 Months Ended

Aug. 31, 2015

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

STOCK-BASED COMPENSATION

The following table summarizes stock-based compensation expense included in Selling, general and administrative expenses for the periods indicated:



	Three months ended August 31,
	2015		2014
Stock option expense	$	0.7	$	0.8
Restricted stock unit expense	0.6		0.7
Management stock purchase plan	0.0		0.0
Employee stock purchase plan	0.1		0.1
Total stock-based compensation expense	$	1.4	$	1.6

During the three month periods ended August 31, 2015 and 2014, respectively, approximately 1.0 million and 0.5 million shares of Common Stock were issued by the Corporation pursuant to its stock-based compensation plans. For the three month periods ended August 31, 2015 and 2014, respectively, total stock-based compensation expense included $0.0 and $0.2 of expenses, respectively, recognized in discontinued operations.