Property, Plant and Equipment (Details) - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Property, plant and equipment
Property, plant and equipment, at cost	$ 498.1	$ 498.6
Accumulated depreciation	(308.4)	(314.2)
Property, plant and equipment, net	189.7	184.4	$ 203.3
Land
Property, plant and equipment
Property, plant and equipment, at cost	13.7	12.5
Buildings and improvements
Property, plant and equipment
Property, plant and equipment, at cost	146.9	146.8
Machinery and equipment
Property, plant and equipment
Property, plant and equipment, at cost	323.4	325.8
Construction in progress
Property, plant and equipment
Property, plant and equipment, at cost	$ 14.1	$ 13.5