Segment Information (Sales by Product Group) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Segment Reporting, Revenue Reconciling Items [Line Items]
Net sales	$ 1,717.4	$ 1,599.1	$ 1,509.1
Contract-Manufactured Products [Member]
Segment Reporting, Revenue Reconciling Items [Line Items]
Net sales	409.1	362.5	320.2
Proprietary Products [Member]
Segment Reporting, Revenue Reconciling Items [Line Items]
Net sales	1,308.6	1,236.9	1,189.9
Intersegment Elimination [Member]
Segment Reporting, Revenue Reconciling Items [Line Items]
Net sales	$ (0.3)	$ (0.3)	$ (1.0)