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v3.25.1

Business Segment and Geographic Information - Segment Revenue, Segment Profit or Loss, and Significant Segment Expenses (Details) - USD ($) $ in Millions | 3 Months Ended
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Mar. 31, 2025 | Mar. 31, 2024
Segment Reporting [Abstract] |  |
Revenue | $ 1,036.0 | $ 921.0
Cost of sales | 447.0 | 359.1
Payroll related expenses | 220.2 | 199.8
Stock-based compensation expense | 31.0 | 35.3
Marketing expense | 70.4 | 61.5
Travel related expenses | 19.6 | 21.0
Supply expenses and clinical trials | 13.7 | 15.7
Consulting & professional fees | 32.7 | 58.0
Equipment, office & facility expenses | 21.5 | 22.2
IT software and data | 35.1 | 32.1
Depreciation and amortization | 9.2 | 11.7
Other segment items | 1.9 | 3.5
Operating income | 133.7 | 101.1
Other income, net | 20.6 | 31.4
Income tax expense | 48.9 | (13.9)
Net income | 105.4 | 146.4
Depreciation and amortization | 60.0 | 52.5
Expenditures for long-lived assets | 87.0 | 56.9
Deferred income taxes | $ 5.8 | $ 41.8

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