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Financing Arrangements (Details) - USD ($)
$ in Millions
Dec. 14, 2022
Nov. 30, 2023
May 31, 2023
Financing Arrangements      
Revolving Credit Facility with interest payable monthly   $ 277.0 $ 272.0
Debt issuance costs, net   (2.0) (2.3)
Long-term debt   275.0 $ 269.7
Revolving Credit Facility | Revolving credit facility expiring September 25, 2024 with interest payable monthly      
Financing Arrangements      
Revolving Credit Facility with interest payable monthly   277.0  
Remaining borrowing capacity   332.0  
Revolving Credit Facility | Revolving credit facility expiring September 25, 2024 with interest payable monthly | Letter of Credit      
Financing Arrangements      
Revolving Credit Facility with interest payable monthly   $ 11.0  
Revolving Credit Facility | Revolving Credit Facility expiring December, 2027      
Financing Arrangements      
Line of credit facility, Additional borrowing capacity $ 300.0    
Line of credit facility, Maximum additional borrowing capacity 920.0    
Credit agreement $ 620.0    
Revolving Credit Facility | Eurodollar rate | Revolving Credit Facility expiring December, 2027 | Minimum      
Financing Arrangements      
Debt instrument basis spread on variable rate after amendment 1.125%    
Revolving Credit Facility | Eurodollar rate | Revolving Credit Facility expiring December, 2027 | Maximum      
Financing Arrangements      
Debt instrument basis spread on variable rate after amendment 2.00%    
Revolving Credit Facility | Base rate | Revolving Credit Facility expiring December, 2027 | Minimum      
Financing Arrangements      
Debt instrument basis spread on variable rate after amendment 0.125%    
Revolving Credit Facility | Base rate | Revolving Credit Facility expiring December, 2027 | Maximum      
Financing Arrangements      
Debt instrument basis spread on variable rate after amendment 1.00%