Stock-Based Compensation

9 Months Ended

Feb. 28, 2019

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 February 28,				Nine months ended February 28,
	2019		2018		2019		2018
Stock option expense	$	0.7	$	0.8	$	4.3	$	6.2
Restricted stock unit expense	0.7		0.6		2.0		2.0
Management stock purchase plan	0.0		0.1		0.2		0.7
Employee stock purchase plan	0.2		0.1		0.3		0.2
Total stock-based compensation expense	$	1.6	$	1.6	$	6.8	$	9.1

The following table sets forth Common Stock issued pursuant to stock-based compensation plans for the periods indicated:



	Three months ended February 28,		Nine months ended February 28,
	2019	2018	2019	2018
Common Stock issued pursuant to stock-based compensation plans (in millions)	0.1	0.2	0.4	0.4