XML 31 R20.htm IDEA: XBRL DOCUMENT v3.25.3
Stock-Based Compensation
 6 Months Ended
Nov. 30, 2025
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,November 30,November 30,
 2025202420252024
Stock option expense$0.1 $0.2 $0.4 $0.8 
Restricted stock unit expense2.2 1.7 3.7 3.2 
Management stock purchase plan0.1 0.1 0.1 0.1 
Employee stock purchase plan0.1 0.1 0.2 0.2 
Total stock-based compensation expense$2.5 $2.1 $4.4 $4.3 
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,November 30,November 30,
 2025202420252024
Common Stock issued pursuant to stock-based compensation plans (in millions)0.30.10.40.2