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Debt - Schedule of Debt (Details) - USD ($)
$ in Millions
Aug. 31, 2023
May 31, 2023
Aug. 31, 2022
Debt Instrument [Line Items]      
Total Debt $ 5.9 $ 6.0 $ 6.3
Less lines of credit, short-term debt and current portion of long-term debt (5.9) (6.0) (6.3)
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 $ 5.9 $ 6.0 $ 6.3