Segment Information - Segment Financial Information (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024	Dec. 31, 2024
Segment Reporting Information [Line Items]
Assets	$ 4,105.8		$ 4,105.8		$ 3,643.4
Depreciation and Amortization	43.0	$ 40.2	124.4	$ 114.7
Capital Expenditures	63.3	81.3	209.8	272.1
Net sales	804.6	746.9	2,269.1	2,144.4
Cost of goods and services sold	510.3	482.2	1,469.0	1,419.5
Research and development	17.1	15.5	52.5	50.6
Selling, general and administrative expenses	102.7	83.5	286.6	253.2
Operating profit	167.6	161.3	428.3	410.3
Stock-based compensation			(17.1)	(14.4)
Restructuring and related charges			(2.5)	0.0
Interest (income) expense and other nonoperating expense (income), net	(4.3)	(3.2)	(11.1)	(10.3)
Income before income taxes and equity in net income of affiliated companies	171.9	164.5	439.4	420.6
Proprietary Products
Segment Reporting Information [Line Items]
Net sales	647.5	601.4	1,830.3	1,720.6
Contract-Manufactured Products
Segment Reporting Information [Line Items]
Net sales	157.1	145.5	438.8	423.8
Operating Segments
Segment Reporting Information [Line Items]
Net sales	804.6	746.9	2,269.1	2,144.4
Cost of goods and services sold
Research and development
Selling, general and administrative expenses
Other segment expense (income)
Operating profit	197.5	180.0	521.1	471.6
Operating Segments | Proprietary Products
Segment Reporting Information [Line Items]
Assets	2,989.3		2,989.3		2,621.1
Depreciation and Amortization	35.1	33.8	101.5	96.8
Capital Expenditures	47.7	47.8	148.1	167.4
Net sales	647.5	601.4	1,830.3	1,720.6
Cost of goods and services sold	383.5	365.7	1,107.8	1,070.8
Research and development	17.1	15.5	52.5	50.6
Selling, general and administrative expenses	65.6	56.6	187.4	173.4
Other segment expense (income)	6.1	5.4	15.1	10.3
Operating profit	175.2	158.2	467.5	415.5
Operating Segments | Contract-Manufactured Products
Segment Reporting Information [Line Items]
Assets	685.9		685.9		612.2
Depreciation and Amortization	7.1	5.5	20.3	15.1
Capital Expenditures	13.6	30.0	57.2	96.8
Net sales	157.1	145.5	438.8	423.8
Cost of goods and services sold	126.8	116.5	361.2	348.7
Research and development	0.0	0.0	0.0	0.0
Selling, general and administrative expenses	7.5	6.7	22.1	19.1
Other segment expense (income)	0.5	0.5	1.9	(0.1)
Operating profit	22.3	21.8	53.6	56.1
Corporate And Reconciling Items
Segment Reporting Information [Line Items]
Assets	430.6		430.6		$ 410.1
Depreciation and Amortization	0.8	0.9	2.6	2.8
Capital Expenditures	2.0	3.5	4.5	7.9
Stock-based compensation	(8.4)	(5.1)	(17.1)	(14.4)
Corporate general costs	(19.0)	(14.3)	(53.6)	(47.2)
Restructuring and related charges	(2.5)	0.9	(21.9)	0.9
Amortization of acquisition-related intangible assets	0.0	(0.2)	(0.2)	(0.6)
Corporate And Reconciling Items | Other Income (Expense)
Segment Reporting Information [Line Items]
Restructuring and related charges	(0.9)	2.5	(17.5)	2.5
Corporate And Reconciling Items | Selling, General and Administrative Expenses
Segment Reporting Information [Line Items]
Restructuring and related charges	$ (1.6)	$ (1.6)	$ (4.4)	$ (1.6)