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CREDIT FACILITIES AND DEBT (Tables)
9 Months Ended
Sep. 30, 2022
Debt Disclosure [Abstract]  
Schedule of Long-term Debt Instruments Debt outstanding consists of the following:
(in millions)September 30, 2022December 31, 2021
2025 Senior Secured Notes$— $1,250.0 
2028 Senior Notes 801.6 826.5 
2025 Senior Notes 664.5 669.5 
Revolving Credit Facility— 900.0 
Catalyst financing arrangements 21.3 58.4 
1,487.4 3,704.4 
Unamortized premium — 0.5 
Unamortized deferred financing costs(39.7)(31.6)
Long-term debt$1,447.7 $3,673.3