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Property, Plant and Equipment, Net (Components of Property, Plant and Equipment, Net) (Details) - USD ($)
$ in Millions
Dec. 31, 2019
Dec. 31, 2018
Property, Plant and Equipment    
Land and improvements $ 34.8 $ 29.3
Buildings and improvements 347.4 325.7
Machinery and equipment 1,800.4 1,553.2
Office equipment and other 303.6 282.4
Property, plant and equipment, gross 2,486.2 2,190.6
Accumulated depreciation (1,487.2) (1,314.8)
Property, plant and equipment, net $ 999.0 $ 875.8