Property, Plant and Equipment Property, Plant and Equipment (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Property, Plant and Equipment [Line Items]
Gross property, plant and equipment	$ 1,799.3	$ 1,551.8
Less: accumulated depreciation	(1,086.8)	(1,004.2)
Property, plant and equipment, net	712.5	547.6
Land and Land Improvements [Member]
Property, Plant and Equipment [Line Items]
Gross property, plant and equipment	67.8	63.5
Building and Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Gross property, plant and equipment	389.7	340.8
Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Gross property, plant and equipment	$ 1,341.8	$ 1,147.5