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PROPERTY, PLANT AND EQUIPMENT (Details) - USD ($)
$ in Millions
Jun. 30, 2022
Dec. 31, 2021
Property, plant and equipment.    
Gross property, plant and equipment $ 833.1 $ 816.8
Less: Accumulated depreciation (391.3) (387.2)
Net property, plant and equipment 441.8 429.6
Property    
Property, plant and equipment.    
Gross property, plant and equipment 55.7 53.1
Plant    
Property, plant and equipment.    
Gross property, plant and equipment 275.1 284.4
Equipment    
Property, plant and equipment.    
Gross property, plant and equipment 403.4 402.4
Leasehold Improvements    
Property, plant and equipment.    
Gross property, plant and equipment 44.9 50.0
Construction in Progress    
Property, plant and equipment.    
Gross property, plant and equipment $ 54.0 $ 26.9