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Summary of Significant Accounting Policies - Restructuring, Supplemental Information on Cash Flows (Details)
$ in Millions
 12 Months Ended
May 31, 2025
USD ($)
employee
May 31, 2024
USD ($)
May 31, 2023
USD ($)
Supplemental information on cash flows      
Interest paid $ 74.4 $ 31.9 $ 11.1
Income taxes paid 24.2 42.4 35.7
Income tax refunds $ 0.5 $ 0.6 $ 1.3
Employee Severance      
Restructuring and other exit costs      
Restructuring and Related Cost, Number of Positions Eliminated | employee 65    
Cost of sales and services and Selling, general and administrative      
Restructuring and other exit costs      
Severance and furlough-related costs $ 0.5