INCOME TAX - (Benefit) Provision for Income Taxes (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Current:
Federal	$ 21.2	$ 16.8	$ 17.0
State	4.3	3.8	3.3
Foreign	0.2	0.1	0.1
Total current	25.7	20.7	20.4
Deferred:
Federal	0.0	(0.6)	(0.8)
State	0.1	(0.2)	0.3
Foreign	(0.1)	(2.4)	0.0
Total deferred	0.0	(3.2)	(0.5)
Income tax	$ 25.7	$ 17.5	$ 19.9