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Other Accrued Expenses - Schedule of Accrued Severance (Details) - USD ($)
$ in Millions
12 Months Ended
May 31, 2023
May 31, 2022
Severance    
Restructuring Reserve [Roll Forward]    
Beginning balance $ 3.0 $ 3.7
Accruals 2.3 8.1
Payments 5.0 8.8
Ending balance $ 0.3 3.0
Cost Reduction Programs [Member]    
Restructuring Reserve [Roll Forward]    
Severance   $ 6.2