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Property, Plant, and Equipment - Components of Property, Plant, and Equipment (Details) - USD ($)
$ in Millions
Jun. 30, 2021
Dec. 31, 2020
Property, Plant, And Equipment [Line Items]    
Property, plant and equipment, at cost $ 7,473.4 $ 7,313.5
Less accumulated depreciation (4,232.9) (4,120.1)
Property, plant, and equipment, net 3,240.5 3,193.4
Land and Land Improvements    
Property, Plant, And Equipment [Line Items]    
Property, plant and equipment, at cost 186.6 179.6
Buildings    
Property, Plant, And Equipment [Line Items]    
Property, plant and equipment, at cost 896.8 858.5
Machinery and Equipment    
Property, Plant, And Equipment [Line Items]    
Property, plant and equipment, at cost 6,027.9 5,826.6
Construction in Progress    
Property, Plant, And Equipment [Line Items]    
Property, plant and equipment, at cost 269.5 360.0
Other    
Property, Plant, And Equipment [Line Items]    
Property, plant and equipment, at cost $ 92.6 $ 88.8