PROPERTY, PLANT AND EQUIPMENT - Schedule of Property, Plant, and Equipment (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 57.4	$ 52.1
Less accumulated depreciation and amortization	36.4	35.6
Property, plant and equipment, net	21.0	16.5
Land improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	0.8	0.8
Furniture and fixtures, office, computer and other equipment and software
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	42.4	37.8
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 14.2	$ 13.5