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Financing Arrangements (Details) - USD ($)
$ in Millions
Aug. 14, 2025
Mar. 01, 2024
Dec. 14, 2022
Aug. 31, 2025
May 31, 2025
Financing Arrangements          
Debt premium, net       $ 2.9  
Debt issuance costs, net       (10.8) $ (9.0)
Long-term debt       1,022.1 968.0
Senior Notes          
Financing Arrangements          
Amended Revolving Credit Facility with interest payable monthly       700.0 550.0
Aggregate principal amount   $ 550.0      
Interest rate (as a percent)   6.75%      
Additional Senior Notes          
Financing Arrangements          
Debt premium, net $ 3.0        
Debt issuance costs, net (2.5)        
Aggregate principal amount $ 150.0        
Debt issuance premium percentage 102.00%        
Redemption Period One | Senior Notes          
Financing Arrangements          
Debt Instrument, Redemption Price, Percentage   100.00%      
Redemption Period Two | Senior Notes          
Financing Arrangements          
Debt Instrument, Redemption Price, Percentage   106.75%      
Percentage of principal amount redeemed   40.00%      
2026          
Financing Arrangements          
Debt Instrument, Redemption Price, Percentage   103.375%      
2027          
Financing Arrangements          
Debt Instrument, Redemption Price, Percentage   101.688%      
2028 and thereafter          
Financing Arrangements          
Debt Instrument, Redemption Price, Percentage   100.00%      
Revolving credit facility with interest payable monthly          
Financing Arrangements          
Amended Revolving Credit Facility with interest payable monthly       330.0 $ 427.0
Revolving Credit Facility          
Financing Arrangements          
Maximum borrowing capacity   $ 825.0 $ 620.0    
Revolving Credit Facility | Minimum          
Financing Arrangements          
Adjusted total debt to EBITDA ratio   3.75      
Revolving Credit Facility | Revolving credit facility with interest payable monthly          
Financing Arrangements          
Amended Revolving Credit Facility with interest payable monthly       330.0  
Line of credit facility, Additional borrowing capacity     300.0    
Line of credit facility, Maximum additional borrowing capacity     $ 1,125.0    
Remaining borrowing capacity       485.9  
Revolving Credit Facility | Revolving credit facility with interest payable monthly | Letter of Credit          
Financing Arrangements          
Income tax refunds received       $ 9.1  
Revolving Credit Facility | Eurodollar rate | Revolving credit facility with interest payable monthly | Minimum          
Financing Arrangements          
Debt instrument basis spread on variable rate after amendment     1.125%    
Revolving Credit Facility | Eurodollar rate | Revolving credit facility with interest payable monthly | Maximum          
Financing Arrangements          
Debt instrument basis spread on variable rate after amendment     2.50%    
Revolving Credit Facility | Base rate          
Financing Arrangements          
Increase in basis spread on variable rate   1.50%      
Revolving Credit Facility | Base rate | Revolving credit facility with interest payable monthly | Minimum          
Financing Arrangements          
Debt instrument basis spread on variable rate after amendment     0.125%    
Revolving Credit Facility | Base rate | Revolving credit facility with interest payable monthly | Maximum          
Financing Arrangements          
Debt instrument basis spread on variable rate after amendment     1.50%    
Revolving Credit Facility | SOFR          
Financing Arrangements          
Increase in basis spread on variable rate   2.50%      
Revolving Credit Facility | SOFR | Revolving credit facility with interest payable monthly          
Financing Arrangements          
Debt instrument basis spread on variable rate after amendment     0.10%