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Property, Plant and Equipment (Details) - USD ($)
$ in Millions
Dec. 31, 2020
Dec. 31, 2019
Property, Plant and Equipment [Abstract]    
Land and improvements $ 40.1 $ 41.8
Buildings and improvements 340.1 337.2
Machinery and equipment 1,506.5 1,467.0
Construction in progress 15.8 44.9
Property, plant and equipment, gross 1,902.5 1,890.9
Less accumulated depreciation (1,022.1) (941.7)
Property, plant and equipment - net $ 880.4 $ 949.2