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Supplemental Financial Information - Accounts Payable and Accrued Liabilities (Details) - USD ($) $ in Millions | Sep. 30, 2025 | Dec. 31, 2024
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Other Balance Sheet Details [Abstract] |  |
Sales rebates and reserves | $ 237.9 | $ 144.2
Accrued employee related costs | 105.1 | 107.5
Accrued development costs | 82.4 | 50.8
Current branded prescription drug fee | 39.0 | 49.2
Accounts payable and other accrued liabilities | 119.9 | 109.9
Total accounts payable and accrued liabilities | $ 584.3 | $ 461.6

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