PROPERTY, PLANT AND EQUIPMENT - Property, Plant and Equipment (Details) - USD ($) $ in Millions	Mar. 31, 2021	Dec. 31, 2020
Property, Plant and Equipment [Line Items]
Right-of-Use assets	$ 85.0	$ 87.0
Property, plant and equipment and Right-of-Use assets, net	335.6	352.0
Land and improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, net	11.0	11.4
Building and improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, net	46.7	48.3
Machinery and equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, net	93.3	98.7
Office furniture, fixtures and capitalized software
Property, Plant and Equipment [Line Items]
Property, plant and equipment, net	73.9	76.2
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, net	20.4	21.3
Construction-in-progress
Property, Plant and Equipment [Line Items]
Property, plant and equipment, net	$ 5.3	$ 9.1