Summary of Significant Accounting Policies - Restructuring and Other Exit Costs, Supplemental Information on Cash Flows (Details) $ in Millions	12 Months Ended
	May 31, 2024 USD ($) employee	May 31, 2023 USD ($)	May 31, 2022 USD ($)
Supplemental information on cash flows
Interest paid	$ 31.9	$ 11.1	$ 2.1
Income taxes paid	42.4	35.7	23.9
Income tax refunds	$ 0.6	$ 1.3	$ 3.8
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