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PROPERTY, PLANT AND EQUIPMENT (Details) - USD ($)
$ in Millions
Mar. 31, 2022
Dec. 31, 2021
Property, plant and equipment.    
Gross property, plant and equipment $ 823.8 $ 816.8
Less: Accumulated depreciation (389.9) (387.2)
Net property, plant and equipment 433.9 429.6
Property    
Property, plant and equipment.    
Gross property, plant and equipment 55.2 53.1
Plant    
Property, plant and equipment.    
Gross property, plant and equipment 281.8 284.4
Equipment    
Property, plant and equipment.    
Gross property, plant and equipment 405.1 402.4
Leasehold Improvements    
Property, plant and equipment.    
Gross property, plant and equipment 45.1 50.0
Construction in Progress    
Property, plant and equipment.    
Gross property, plant and equipment $ 36.6 $ 26.9