Debt - Schedule of Debt (Details) - USD ($) $ in Millions	Nov. 30, 2023	May 31, 2023	Nov. 30, 2022
Debt Instrument [Line Items]
Total Debt	$ 6.3	$ 6.0	$ 4.8
Less lines of credit, short-term debt and current portion of long-term debt	(6.3)	(6.0)	(4.8)
Total long-term debt	0.0	0.0	0.0
Revolving Credit Facility
Debt Instrument [Line Items]
Total Debt	0.0	0.0	0.0
Line of Credit | Unsecured Debt
Debt Instrument [Line Items]
Total Debt	$ 6.3	$ 6.0	$ 4.8