XML 30 R20.htm IDEA: XBRL DOCUMENT v3.22.2.2
Stock-Based Compensation
 6 Months Ended
Nov. 30, 2022
Share-based Payment Arrangement [Abstract]  
Stock-Based Compensation STOCK-BASED COMPENSATION
 
The following table summarizes stock-based compensation expense included in Selling, general and administrative expenses for the periods indicated: 
 Three months endedSix months ended
November 30,November 30,
 2022202120222021
Stock option expense$2.4 $1.8 $3.0 $2.5 
Restricted stock unit expense1.3 0.9 2.3 1.6 
Management stock purchase plan0.4 0.3 0.4 0.3 
Employee stock purchase plan0.1 0.0 0.2 0.1 
Total stock-based compensation expense$4.2 $3.0 $5.9 $4.5 
The following table sets forth Common Stock issued pursuant to stock-based compensation plans for the periods indicated:
 Three months endedSix months ended
November 30,November 30,
 2022202120222021
Common Stock issued pursuant to stock-based compensation plans (in millions)0.3 0.2 0.6 0.3