FAIR VALUE MEASUREMENTS (Fair Value and Carrying Value of Debt) (Details) - USD ($) $ in Millions		Sep. 30, 2024	Dec. 31, 2023
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term Debt, Gross		$ 1,301.6	$ 1,301.6
Unamortized discount		(2.9)	(3.2)
Less - Unamortized deferred financing costs		(44.3)	(52.5)
Long-term debt, Carrying value		1,254.4	1,245.9
Long-term debt, Fair value		1,306.0	1,294.1
Long-term debt, excluding current maturities, Fair value		1,306.0	1,294.1
2028 Senior Notes
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term Debt	[1]	801.6	801.6
Long-term debt, Fair value	[1]	790.7	779.3
2030 Senior Notes
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term Debt	[1]	500.0	500.0
Long-term debt, Fair value	[1]	$ 515.3	$ 514.8

[1] The estimated fair value, categorized as a Level 2 measurement, was calculated based on the present value of future expected payments utilizing implied current market interest rates based on quoted prices of the outstanding senior notes.