Property, Plant and Equipment (Components) (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Property, Plant and Equipment [Abstract]
Land	$ 35.7	$ 33.9
Buildings and improvements	234.4	218.2
Machinery and equipment	804.4	742.1
Capital leases	27.5	27.3
Construction in progress and equipment not yet in service	70.0	57.1
Total	1,172.0	1,078.6
Less accumulated depreciation	(774.2)	(717.2)
Property, plant and equipment, net	$ 397.8	$ 361.4	$ 339.6