Segment Information - Segment Financial Information (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024	Dec. 31, 2024
Segment Reporting Information [Line Items]
Assets	$ 3,952.8		$ 3,952.8		$ 3,643.4
Depreciation and Amortization	41.4	$ 38.9	81.4	$ 74.5
Capital Expenditures	75.2	100.2	146.5	190.8
Net sales	766.5	702.1	1,464.5	1,397.5
Cost of goods and services sold	492.6	472.1	958.7	937.3
Research and development	19.1	17.5	35.4	35.1
Selling, general and administrative expenses	95.9	83.0	183.9	169.7
Operating profit	153.7	126.2	260.7	249.0
Stock-based compensation			(8.7)	(9.3)
Restructuring and related charges			1.6	0.0
Interest (income) expense and other nonoperating expense (income), net	(3.3)	(2.5)	(6.8)	(7.1)
Income before income taxes and equity in net income of affiliated companies	157.0	128.7	267.5	256.1
Proprietary Products
Segment Reporting Information [Line Items]
Net sales	619.8	559.7	1,182.8	1,119.2
Contract-Manufactured Products
Segment Reporting Information [Line Items]
Net sales	146.7	142.4	281.7	278.3
Operating Segments
Segment Reporting Information [Line Items]
Net sales	766.5	702.1	1,464.5	1,397.5
Cost of goods and services sold
Research and development
Selling, general and administrative expenses
Other segment expense (income)
Operating profit	179.5	148.2	323.6	291.6
Operating Segments | Proprietary Products
Segment Reporting Information [Line Items]
Assets	2,829.3		2,829.3		2,621.1
Depreciation and Amortization	33.7	33.0	66.4	63.0
Capital Expenditures	48.5	58.5	100.4	119.6
Net sales	619.8	559.7	1,182.8	1,119.2
Cost of goods and services sold	371.5	352.7	724.3	705.1
Research and development	19.1	17.5	35.4	35.1
Selling, general and administrative expenses	61.5	56.1	121.8	116.8
Other segment expense (income)	6.0	2.4	9.0	4.9
Operating profit	161.7	131.0	292.3	257.3
Operating Segments | Contract-Manufactured Products
Segment Reporting Information [Line Items]
Assets	667.9		667.9		612.2
Depreciation and Amortization	6.8	4.9	13.2	9.6
Capital Expenditures	25.5	39.2	43.6	66.8
Net sales	146.7	142.4	281.7	278.3
Cost of goods and services sold	121.1	119.4	234.4	232.2
Research and development	0.0	0.0	0.0	0.0
Selling, general and administrative expenses	7.0	6.2	14.6	12.4
Other segment expense (income)	0.8	(0.4)	1.4	(0.6)
Operating profit	17.8	17.2	31.3	34.3
Corporate And Reconciling Items
Segment Reporting Information [Line Items]
Assets	455.6		455.6		$ 410.1
Depreciation and Amortization	0.9	1.0	1.8	1.9
Capital Expenditures	1.2	2.5	2.5	4.4
Stock-based compensation	(7.4)	(4.3)	(8.7)	(9.3)
Corporate general costs	(16.8)	(17.5)	(34.6)	(32.9)
Restructuring and related charges	1.6	0.0	19.4	0.0
Amortization of acquisition-related intangible assets	0.0	$ (0.2)	(0.2)	$ (0.4)
Corporate And Reconciling Items | Other Income (Expense)
Segment Reporting Information [Line Items]
Restructuring and related charges	0.2		16.6
Corporate And Reconciling Items | Selling, General and Administrative Expenses
Segment Reporting Information [Line Items]
Restructuring and related charges	$ 1.4		$ 2.8