v3.25.3
DEBT (Details 1) - USD ($)
$ in Millions
9 Months Ended
Sep. 30, 2025
Mar. 14, 2025
Dec. 31, 2024
Nov. 20, 2024
Sep. 30, 2024
Debt Instrument [Line Items]          
Receivables Financing Agreements $ 470.0   $ 475.0   $ 339.8
Deferred debt issuance costs (19.0)   (14.3)   (14.0)
Unamortized bond original issue discount 0.0   (0.1)   (0.1)
Total debt 2,993.4   2,842.2   2,889.5
Amounts due within one year 19.2   129.0   123.9
Total long-term debt 2,974.2   2,713.2   2,765.6
Quarterly Required Principal Payment Percent Through 2027   0.625%      
Quarterly Required Principal Payment Percent After 2027   1.25%      
Interest and Debt Expense 3.3        
AR Facilities, Recourse Liability 0.0   0.0   0.0
9.5% senior note          
Debt Instrument [Line Items]          
Notes Payable $ 0.0   $ 108.6   $ 108.6
Debt Instrument, Interest Rate, Stated Percentage 9.50%   9.50%   9.50%
5.125% senior note          
Debt Instrument [Line Items]          
Notes Payable $ 0.0   $ 500.0   $ 500.0
Debt Instrument, Interest Rate, Stated Percentage 5.125%   5.125%   5.125%
5.625% senior note          
Debt Instrument [Line Items]          
Notes Payable $ 669.3   $ 669.3   $ 669.3
Debt Instrument, Interest Rate, Stated Percentage 5.625%   5.625%   5.625%
5.00% senior note          
Debt Instrument [Line Items]          
Notes Payable $ 515.3   $ 515.3   $ 515.3
Debt Instrument, Interest Rate, Stated Percentage 5.00%   5.00%   5.00%
6.625% senior note          
Debt Instrument [Line Items]          
Notes Payable $ 600.0   $ 0.0   $ 0.0
Debt Instrument, Interest Rate, Stated Percentage 6.625%   6.63%   6.63%
Variable-rate Term Loan [Member]          
Debt Instrument [Line Items]          
Notes Payable $ 641.9   $ 332.5   $ 334.7
Variable-rate Senior Revolving Facility          
Debt Instrument [Line Items]          
Notes Payable 30.0   170.0   350.0
Variable-rate Recovery Zone bonds          
Debt Instrument [Line Items]          
Notes Payable 83.0   83.0   83.0
Variable-rate industrial and environmental obligations          
Debt Instrument [Line Items]          
Notes Payable 2.9   2.9   2.9
$1,850.0 Million Secured Credit Facility          
Debt Instrument [Line Items]          
2025 Senior Credit Facility   $ 1,850.0      
2025 Senior Credit Facility Increase   300.0      
Senior Term Loan          
Debt Instrument [Line Items]          
Notes Payable   350.0      
9.5% senior note before paydown          
Debt Instrument [Line Items]          
Notes Payable 108.6        
5.125% senior note before paydown          
Debt Instrument [Line Items]          
Notes Payable 500.0        
2022 Senior Term Loan          
Debt Instrument [Line Items]          
Notes Payable   $ 332.5      
Receivables Financing Agreement          
Debt Instrument [Line Items]          
Receivables Financing Agreements     $ 475.0   $ 339.8
Secured Borrowing Maximum Capacity       $ 500.0  
Secured Borrowing Maximum Capacity Borrowing Limit       425.0  
Secured Borrowing Maximum Capacity Increase       $ 75.0  
Trade Receivables Pledged as Collateral for Secured Borrowings 617.0        
Receivables Financing Agreement Available Borrowing Capacity $ 28.0