Property, Plant and Equipment (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Property, Plant and Equipment [Abstract]
Land	$ 29.4	$ 26.1
Buildings and improvements	208.6	201.4
Machinery and equipment	612.9	603.2
Construction in progress and equipment not yet in service	32.1	24.0
Total	883.0	854.7
Less accumulated depreciation	(584.8)	(554.0)
Property, plant and equipment, net	$ 298.2	$ 300.7	$ 308.5