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PROPERTY, PLANT AND EQUIPMENT (Details) - USD ($)
$ in Millions
Mar. 31, 2024
Dec. 31, 2023
Property, plant and equipment.    
Property, plant and equipment – gross  $ 1,008.9 $ 995.0
Less: Accumulated depreciation (435.2) (425.2)
Property, plant and equipment – net 573.7 569.8
Property    
Property, plant and equipment.    
Property, plant and equipment – gross  80.2 75.1
Plant    
Property, plant and equipment.    
Property, plant and equipment – gross  313.1 302.4
Equipment    
Property, plant and equipment.    
Property, plant and equipment – gross  506.4 492.3
Leasehold improvements    
Property, plant and equipment.    
Property, plant and equipment – gross  52.1 51.8
Construction in progress    
Property, plant and equipment.    
Property, plant and equipment – gross  $ 57.1 $ 73.4