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PROPERTY, PLANT AND EQUIPMENT (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Property, plant and equipment.      
Gross property, plant and equipment $ 816.8 $ 764.9  
Less: Accumulated depreciation (387.2) (358.3)  
Net property, plant and equipment 429.6 406.6  
Depreciation 44.3 42.3 $ 39.6
Property      
Property, plant and equipment.      
Gross property, plant and equipment 53.1 43.6  
Plant      
Property, plant and equipment.      
Gross property, plant and equipment 284.4 250.1  
Equipment      
Property, plant and equipment.      
Gross property, plant and equipment 402.4 390.2  
Leasehold improvements      
Property, plant and equipment.      
Gross property, plant and equipment 50.0 49.9  
Construction in progress      
Property, plant and equipment.      
Gross property, plant and equipment $ 26.9 $ 31.1