v3.26.1
Segment Information - Schedule of Segment Financial Information (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Segment Reporting [Line Items]          
Assets $ 4,076.4   $ 4,076.4   $ 4,270.0
Depreciation and Amortization 46.2 $ 41.4 91.4 $ 81.4  
Capital Expenditures 43.2 75.2 85.9 146.5  
Net sales 872.3 766.5 1,717.2 1,464.5  
Cost of goods and services sold 543.1 492.6 1,091.6 958.7  
Research and development 19.7 19.1 35.5 35.4  
Selling, general and administrative expenses 117.6 95.9 217.1 183.9  
Operating profit 179.1 153.7 356.2 260.7  
Stock-based compensation     (17.5) (8.7)  
Cost-method investment activity (3.5) 0.0 (3.5) 0.0  
Other (0.5) (0.1) (0.2) (0.2)  
Interest (income) expense and other nonoperating expense (income), net (1.0) (3.3) (4.0) (6.8)  
Income before income taxes and equity in net income of affiliated companies 180.1 157.0 360.2 267.5  
Proprietary Products          
Segment Reporting [Line Items]          
Net sales 722.6 619.8 1,416.9 1,182.8  
West Vantage          
Segment Reporting [Line Items]          
Net sales 149.7 146.7 300.3 281.7  
Operating Segments          
Segment Reporting [Line Items]          
Net sales 872.3 766.5 1,717.2 1,464.5  
Operating profit 224.8 179.5 429.6 323.6  
Operating Segments | Proprietary Products          
Segment Reporting [Line Items]          
Assets 2,909.2   2,909.2   2,987.0
Depreciation and Amortization 36.3 33.7 72.7 66.4  
Capital Expenditures 35.4 48.5 71.9 100.4  
Net sales 722.6 619.8 1,416.9 1,182.8  
Cost of goods and services sold 414.6 371.5 835.8 724.3  
Research and development 19.7 19.1 35.5 35.4  
Selling, general and administrative expenses 69.5 61.5 134.5 121.8  
Other segment expense (income) 6.9 6.0 10.0 9.0  
Operating profit 211.9 161.7 401.1 292.3  
Operating Segments | West Vantage          
Segment Reporting [Line Items]          
Assets 717.7   717.7   718.1
Depreciation and Amortization 9.2 6.8 17.2 13.2  
Capital Expenditures 5.1 25.5 10.7 43.6  
Net sales 149.7 146.7 300.3 281.7  
Cost of goods and services sold 128.5 121.1 255.8 234.4  
Research and development 0.0 0.0 0.0 0.0  
Selling, general and administrative expenses 8.3 7.0 16.1 14.6  
Other segment expense (income) 0.0 0.8 (0.1) 1.4  
Operating profit 12.9 17.8 28.5 31.3  
Corporate And Reconciling Items          
Segment Reporting [Line Items]          
Assets 449.5   449.5   $ 564.9
Depreciation and Amortization 0.7 0.9 1.5 1.8  
Capital Expenditures 2.7 1.2 3.3 2.5  
Stock-based compensation (10.9) (7.4) (17.5) (8.7)  
Corporate general costs (16.5) (16.8) (33.7) (34.6)  
Restructuring and other charges (1.5) (1.6) (2.9) (19.4)  
M&A activities, including SmartDose® 3.5mL sale (6.4) 0.0 (8.3) 0.0  
Cost-method investment activity (3.5) 0.0 (3.5) 0.0  
Amortization of acquisition-related intangible assets   (0.0) 0.0 (0.2)  
Other $ (6.9) $ 0.0 $ (7.5) $ 0.0