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Financing Agreements - Interest Rates and Maturities (Details) - USD ($)
$ in Millions
Jun. 30, 2024
Dec. 31, 2023
Nov. 30, 2023
Debt Instrument [Line Items]      
Effective interest rate 5.23%    
Finance lease obligations $ 9.2 $ 10.3  
Unamortized debt issuance costs and discounts (12.6) (14.3)  
Total financing obligations 2,143.5 1,908.4  
Less: Current financing obligations 54.1 54.0  
Total long-term financing obligations $ 2,089.4 1,854.4  
Revolving Credit Facility      
Debt Instrument [Line Items]      
Average interest rate as of June 30, 2024 6.16%    
Senior Notes | Senior Unsecured Notes 4.23% Due July 2028      
Debt Instrument [Line Items]      
Stated interest rate 4.23%    
Long-term debt $ 350.0 350.0  
Senior Notes | Public Senior Note Six Point Nine Five Percent Due March Twenty Twenty-Nine      
Debt Instrument [Line Items]      
Stated interest rate 6.95%   6.95%
Long-term debt $ 500.0 500.0  
Notes payable and other      
Debt Instrument [Line Items]      
Stated interest rate 4.29%    
Long-term debt $ 53.4 54.2  
Revolving Credit Facility      
Debt Instrument [Line Items]      
Revolving loan facility $ 487.5 228.2  
Term loan      
Debt Instrument [Line Items]      
Average interest rate as of June 30, 2024 6.69%    
Revolving loan facility $ 756.0 $ 780.0