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Property, Plant and Equipment (Components) (Details) - USD ($)
$ in Millions
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Property, Plant and Equipment [Abstract]      
Land $ 23.7 $ 25.5  
Buildings and improvements 242.9 210.9  
Machinery and equipment 883.4 838.6  
Capital leases 47.2 49.9  
Construction in progress and equipment not yet in service 72.5 61.9  
Total 1,269.7 1,186.8  
Less accumulated depreciation (824.3) (778.5)  
Property, plant and equipment, net $ 445.4 $ 408.3 $ 397.8