v3.26.1
DEBT (Details 1) - USD ($)
$ in Millions
6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Mar. 14, 2025
Nov. 20, 2024
Oct. 11, 2022
Debt Instrument [Line Items]            
2024 Receivables Financing Agreement $ 442.0 $ 465.0 $ 340.0      
Deferred debt issuance costs (18.6) (19.7) (18.1)      
Total debt 3,029.1 2,996.7 2,827.3      
Amounts due within one year 0.0 19.2 109.7      
Total long-term debt 3,029.1 2,977.5 $ 2,717.6      
Interest and Debt Expense (0.2) (3.3)        
AR Facilities, Recourse Liability 0.0 0.0        
Repayments $ (374.3) $ (2,170.2)        
9.5% senior note            
Debt Instrument [Line Items]            
Debt Instrument, Interest Rate, Stated Percentage 9.50% 9.50% 9.50%      
Repayments $ 0.0 $ (108.6)        
5.125% senior note            
Debt Instrument [Line Items]            
Debt Instrument, Interest Rate, Stated Percentage 5.125% 5.125% 5.125%      
Repayments $ 0.0 $ (500.0)        
5.625% senior note            
Debt Instrument [Line Items]            
Debt Instrument, Interest Rate, Stated Percentage 5.625% 5.625% 5.625%      
Long-Term Debt, Gross $ 669.3 $ 669.3 $ 669.3      
5.00% senior note            
Debt Instrument [Line Items]            
Debt Instrument, Interest Rate, Stated Percentage 5.00% 5.00% 5.00%      
Long-Term Debt, Gross $ 515.3 $ 515.3 $ 515.3      
6.625% senior note            
Debt Instrument [Line Items]            
Debt Instrument, Interest Rate, Stated Percentage 6.625% 6.63% 6.63%      
Long-Term Debt, Gross $ 600.0 $ 600.0 $ 600.0      
Variable-rate Term Loan [Member]            
Debt Instrument [Line Items]            
Long-Term Debt, Gross 528.1 645.9 637.8      
Variable-rate Senior Revolving Facility            
Debt Instrument [Line Items]            
Letters of Credit Outstanding, Amount   35.0 0.0      
Variable-rate Recovery Zone bonds            
Debt Instrument [Line Items]            
Long-Term Debt, Gross 83.0 83.0 83.0      
Variable-rate industrial and environmental obligations            
Debt Instrument [Line Items]            
Long-Term Debt, Gross 0.0 2.9 $ 0.0      
$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    
Letters of Credit Outstanding, Amount 210.0          
Senior Term Loan            
Debt Instrument [Line Items]            
Repayments (109.7) (336.6)        
Long-Term Debt, Gross           $ 650.0
9.5% senior note before paydown            
Debt Instrument [Line Items]            
Long-Term Debt, Gross 108.6          
5.125% senior note before paydown            
Debt Instrument [Line Items]            
Long-Term Debt, Gross 500.0          
2022 Senior Term Loan            
Debt Instrument [Line Items]            
Long-Term Debt, Gross       $ 332.5   350.0
Receivables Financing Agreement            
Debt Instrument [Line Items]            
Secured Borrowing Maximum Capacity         $ 500.0  
Trade Receivables Pledged as Collateral for Secured Borrowings 640.8          
Receivables Financing Agreement Available Borrowing Capacity 50.6          
Secured Borrowing Maximum Capacity Borrowing Net Leverage Ratio Limit 425.0          
Repayments (113.0) $ (580.0)        
Senior Secured Revolving Credit Subfacility            
Debt Instrument [Line Items]            
Senior Revolving Credit Facility, Maximum Borrowing Capacity $ 100.0          
$1,200.0 million Senior Revolving Credit Facility            
Debt Instrument [Line Items]            
Senior Revolving Credit Facility, Maximum Borrowing Capacity           $ 1,200.0