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PROPERTY, PLANT AND EQUIPMENT (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Property, Plant and Equipment [Line Items]      
Property, plant and equipment $ 6,890.8 $ 6,591.9  
Accumulated depreciation (3,719.8) (3,268.1)  
Property, plant and equipment, net $ 3,171.0 3,323.8  
Weighted Average Useful Life of Machinery and Equipment 11 years    
Depreciation expense $ 445.4 493.3 $ 497.8
Interest capitalized 6.4 10.8 6.0
Increase (Decrease) to Capital Expenditures For Amounts Included In Accounts Payable and Accrued Liabilities 31.0 (5.7) $ (25.5)
Land and improvements to land      
Property, Plant and Equipment [Line Items]      
Property, plant and equipment $ 282.7 277.5  
Land and improvements to land | Minimum      
Property, Plant and Equipment [Line Items]      
Property, plant and equipment, useful life (in years) 10 years    
Land and improvements to land | Maximum      
Property, Plant and Equipment [Line Items]      
Property, plant and equipment, useful life (in years) 20 years    
Buildings and building equipment      
Property, Plant and Equipment [Line Items]      
Property, plant and equipment $ 409.4 392.4  
Buildings and building equipment | Minimum      
Property, Plant and Equipment [Line Items]      
Property, plant and equipment, useful life (in years) 10 years    
Buildings and building equipment | Maximum      
Property, Plant and Equipment [Line Items]      
Property, plant and equipment, useful life (in years) 30 years    
Machinery and equipment      
Property, Plant and Equipment [Line Items]      
Property, plant and equipment $ 5,945.2 5,566.0  
Machinery and equipment | Minimum      
Property, Plant and Equipment [Line Items]      
Property, plant and equipment, useful life (in years) 3 years    
Machinery and equipment | Maximum      
Property, Plant and Equipment [Line Items]      
Property, plant and equipment, useful life (in years) 20 years    
Leasehold improvements      
Property, Plant and Equipment [Line Items]      
Property, plant and equipment $ 8.3 9.9  
Leasehold improvements | Minimum      
Property, Plant and Equipment [Line Items]      
Property, plant and equipment, useful life (in years) 3 years    
Leasehold improvements | Maximum      
Property, Plant and Equipment [Line Items]      
Property, plant and equipment, useful life (in years) 11 years    
Construction in progress      
Property, Plant and Equipment [Line Items]      
Property, plant and equipment $ 245.2 $ 346.1