Segment Information (Details) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020 USD ($)	Sep. 30, 2019 USD ($)	Sep. 30, 2020 USD ($) segment	Sep. 30, 2019 USD ($)
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Number of reportable segments | segment			2
Net sales	$ 548.0	$ 456.1	$ 1,566.7	$ 1,369.3
Total operating profit	99.2	67.3	290.8	218.5
Interest expense	2.1	2.1	6.1	6.4
Interest income	(0.2)	(1.0)	(1.2)	(2.5)
Other nonoperating (income) expense	(0.4)	1.3	(0.3)	0.2
Income before income taxes	97.7	64.9	286.2	214.4
Severance related costs	4.5	0.6	4.5	2.2
Argentina currency devaluation	0.0	1.0	0.0	1.0
Intersegment sales elimination
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Net sales	(0.1)	(0.2)	(0.3)	(0.2)
Corporate
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total operating profit	(22.4)	(14.4)	(67.1)	(48.9)
Other unallocated items
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total operating profit	(4.7)	(2.8)	(7.1)	(4.8)
Restructuring and related charges	4.5	1.8	4.5	3.8
Amortization of intangible assets	0.2		0.4
Severance related costs			2.2
Argentina currency devaluation		1.0		1.0
Proprietary Products | Operating Segments
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Net sales	421.5	345.2	1,194.5	1,045.9
Total operating profit	107.5	72.9	312.9	238.7
Contract-Manufactured Products | Operating Segments
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Net sales	126.6	111.1	372.5	323.6
Total operating profit	$ 18.8	$ 11.6	$ 52.1	$ 33.5