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CREDIT FACILITIES AND DEBT (Summary of Long-Term Debt) (Details) - USD ($)
$ in Millions
Dec. 31, 2022
Dec. 31, 2021
Debt Instrument [Line Items]    
Long-term Debt, Gross $ 1,470.1 $ 3,704.4
Unamortized premium 0.0 0.5
Unamortized deferred financing costs (35.2) (31.6)
Long-term debt 1,434.9 3,673.3
Revolving Credit Facility    
Debt Instrument [Line Items]    
Long-term line of credit 0.0 900.0
2025 Senior Secured Notes    
Debt Instrument [Line Items]    
Long-term Debt 0.0 1,250.0
2028 Senior Notes    
Debt Instrument [Line Items]    
Long-term Debt 801.6 826.5
2025 Senior Notes    
Debt Instrument [Line Items]    
Long-term Debt 664.5 669.5
Catalyst financing arrangements    
Debt Instrument [Line Items]    
Long-term Debt $ 4.0 $ 58.4
Catalyst Financing Arrangement | Delaware City    
Debt Instrument [Line Items]    
Annual interest rate [1] 4.60%  
[1] This catalyst financing arrangement is included in Long-term debt as of December 31, 2022 as the Company has the ability and intent to finance this debt through availability under other credit facilities if the catalyst financing arrangement is not renewed at maturity.