Segment Information (Details) $ in Millions	3 Months Ended
	Mar. 31, 2019 USD ($) segment	Mar. 31, 2018 USD ($)
Segment Reporting [Abstract]
Number of reportable segments | segment	2
Restructuring and related charges	$ 0.6	$ 3.3
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Net sales	443.5	415.7
Total operating (loss) profit	70.7	53.4
Interest expense	2.3	1.9
Interest income	(0.9)	(0.6)
Other nonoperating income	(0.6)	(1.6)
Income before income taxes	69.9	53.7
Proprietary Products [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Net sales	340.4	326.2
Total operating (loss) profit	77.0	62.8
Contract-Manufactured Products [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Net sales	103.1	89.5
Total operating (loss) profit	10.5	9.5
Corporate [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total operating (loss) profit	(16.2)	(15.6)
Other unallocated items [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total operating (loss) profit	$ (0.6)	$ (3.3)