CREDIT FACILITIES AND DEBT (Summary of Long-Term Debt) (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Debt Instrument [Line Items]
Long-term debt, gross	$ 1,301.6	$ 1,470.1
Unamortized discount	(3.2)	0.0
Unamortized deferred financing costs	(52.5)	(35.2)
Long-term debt	1,245.9	1,434.9
Revolving Credit Facility
Debt Instrument [Line Items]
Long-term line of credit	0.0	0.0
2028 Senior Notes
Debt Instrument [Line Items]
Long-term Debt	801.6	801.6
2030 Senior Notes
Debt Instrument [Line Items]
Long-term Debt	500.0	0.0
2025 Senior Notes
Debt Instrument [Line Items]
Long-term Debt	0.0	664.5
Catalyst financing arrangements
Debt Instrument [Line Items]
Long-term Debt	$ 0.0	$ 4.0