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Revenues - Allowance for Credit Losses (Details) - USD ($)
$ in Millions
12 Months Ended
May 31, 2023
May 31, 2022
May 31, 2021
Accounts Receivable, Allowance for Credit Loss [Roll Forward]      
Beginning balance $ 25.9    
Current period provision 3.3 $ 15.2 $ 5.2
Write-offs and other (12.5)    
Ending balance $ 16.7 $ 25.9