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Property, Plant, and Equipment - Components of Property, Plant, and Equipment (Details) - USD ($)
$ in Millions
Sep. 30, 2019
Dec. 31, 2018
Property, Plant, And Equipment [Line Items]    
Property, plant and equipment, at cost $ 6,905.6 $ 6,691.1
Less accumulated depreciation (3,795.2) (3,582.5)
Total 3,110.4 3,108.6
Land and Land Improvements    
Property, Plant, And Equipment [Line Items]    
Property, plant and equipment, at cost 167.5 161.9
Buildings    
Property, Plant, And Equipment [Line Items]    
Property, plant and equipment, at cost 815.4 795.5
Machinery and Equipment    
Property, Plant, And Equipment [Line Items]    
Property, plant and equipment, at cost 5,672.3 5,481.6
Construction in Progress    
Property, Plant, And Equipment [Line Items]    
Property, plant and equipment, at cost 173.3 176.7
Other    
Property, Plant, And Equipment [Line Items]    
Property, plant and equipment, at cost $ 77.1 $ 75.4