Segment Information (Sales by Product Group) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Segment Reporting, Revenue Reconciling Items [Line Items]
Net sales	$ 1,839.9	$ 1,717.4	$ 1,599.1
Contract-Manufactured Products [Member]
Segment Reporting, Revenue Reconciling Items [Line Items]
Net sales	441.5	409.1	362.5
Proprietary Products [Member]
Segment Reporting, Revenue Reconciling Items [Line Items]
Net sales	1,398.6	1,308.6	1,236.9
Intersegment Elimination [Member]
Segment Reporting, Revenue Reconciling Items [Line Items]
Net sales	$ (0.2)	$ (0.3)	$ (0.3)