INCOME TAXES - Valuation Allowance (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Movement in Valuation Allowances and Reserves [Roll Forward]
Reductions due to divestitures	$ (34.0)	$ 0.0	$ (2.1)
Valuation Allowance on Deferred Tax Assets
Movement in Valuation Allowances and Reserves [Roll Forward]
Balances at beginning of period	67.2	61.4	52.0
Additions charges to income tax expense	1.8	6.8	10.5
Other changes to reserves	1.8	(1.0)	1.0
Balances at end of period	$ 36.8	$ 67.2	$ 61.4