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Share-based compensation and stockholders' equity - Schedule of Stock-based Compensation Expense (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
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Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2024
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] |  |  |  |
Total share-based compensation expense | $ 4.6 | $ 5.5 | $ 6.1 | $ 11.4
Cost of products and services sales, net |  |  |  |
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] |  |  |  |
Total share-based compensation expense | 0.3 | 0.8 | 0.6 | 1.6
Research & development |  |  |  |
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] |  |  |  |
Total share-based compensation expense | 0.2 | 0.5 | 0.4 | 1.0
Selling, general and administrative |  |  |  |
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] |  |  |  |
Total share-based compensation expense | $ 4.1 | $ 4.2 | $ 5.1 | $ 8.8

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