Segment Information (Sales and PPE by Geographic Location) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Revenues from External Customers and Long-Lived Assets [Line Items]
Sales	$ 1,266.4	$ 1,192.3	$ 1,104.7
Property, Plant and Equipment, Net	669.0	593.6	554.8
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Sales	592.8	543.6	528.2
Property, Plant and Equipment, Net	322.0	272.6	232.8
Germany [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Sales	184.4	184.1	151.5
Property, Plant and Equipment, Net	117.2	118.1	117.8
France [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Sales	102.6	94.2	89.0
Property, Plant and Equipment, Net	42.1	41.3	42.4
Other European countries [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Sales	251.4	242.7	225.6
Property, Plant and Equipment, Net	72.3	69.9	77.2
Other [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Sales	135.2	127.7	110.4
Property, Plant and Equipment, Net	$ 115.4	$ 91.7	$ 84.6