Segment Information (Sales and PPE by Geographic Location) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Revenues from External Customers and Long-Lived Assets [Line Items]
Sales	$ 1,421.4	$ 1,368.4	$ 1,266.4
Property, Plant and Equipment, Net	705.8	711.7	669.0
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Sales	655.5	614.5	592.8
Property, Plant and Equipment, Net	339.4	336.0	322.0
Germany [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Sales	219.4	219.6	184.4
Property, Plant and Equipment, Net	110.9	124.4	117.2
France [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Sales	118.2	112.6	102.6
Property, Plant and Equipment, Net	40.4	43.4	42.1
Other European Countries [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Sales	285.0	279.4	251.4
Property, Plant and Equipment, Net	91.5	83.2	72.3
Other [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Sales	143.3	142.3	135.2
Property, Plant and Equipment, Net	$ 123.6	$ 124.7	$ 115.4