CREDIT FACILITIES AND DEBT (Tables)

12 Months Ended

Dec. 31, 2023

Debt Disclosure [Abstract]

Summary of Long-term Debt Outstanding

Debt outstanding consisted of the following:

(in millions)	December 31, 2023		December 31, 2022
2028 Senior Notes	$	801.6	$	801.6
2030 Senior Notes	500.0		—
2025 Senior Notes	—		664.5
Revolving Credit Facility	—		—
Catalyst financing arrangements	—		4.0
	1,301.6		1,470.1
Unamortized discount	(3.2)		—
Unamortized deferred financing costs	(52.5)		(35.2)
Long-term debt	$	1,245.9	$	1,434.9

Schedule of Debt Maturing in the Next Five Years and Thereafter

Debt maturing in the next five years and thereafter is as follows (in millions):

Year Ending December 31,
2024	$	—
2025	—
2026	—
2027	—
2028	801.6
Thereafter	500.0
Total debt outstanding	$	1,301.6