Segment Information (Sales and PPE by Geographic Location) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	$ 1,509.1	$ 1,399.8	$ 1,421.4
Property, Plant and Equipment, Net	778.3	721.0	705.8
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	738.3	667.4	630.7
Property, Plant and Equipment, Net	329.3	332.3	327.5
Germany [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	200.6	194.0	219.4
Property, Plant and Equipment, Net	96.8	102.9	110.9
France [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	116.3	107.6	118.2
Property, Plant and Equipment, Net	37.1	38.6	40.4
Other European Countries [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	268.3	252.0	285.0
Property, Plant and Equipment, Net	192.3	117.6	91.5
Other [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	185.6	178.8	168.1
Property, Plant and Equipment, Net	$ 122.8	$ 129.6	$ 135.5