Segment Information (Sales and PPE by Geographic Location) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	$ 1,839.9	$ 1,717.4	$ 1,599.1
Property, plant and equipment, net	839.3	822.0	855.0
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	814.7	766.1	734.6
Property, plant and equipment, net	337.1	315.3	323.8
Germany [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	236.3	235.9	226.4
Property, plant and equipment, net	95.4	99.3	108.8
France [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	150.6	145.0	142.6
Property, plant and equipment, net	53.3	50.1	51.6
Other European countries [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	251.1	230.5	201.0
Property, plant and equipment, net	59.1	59.5	63.2
Other [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	213.4	201.8	194.0
Property, plant and equipment, net	132.4	132.4	134.4
IRELAND
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	173.8	138.1	100.5
Property, plant and equipment, net	$ 162.0	$ 165.4	$ 173.2