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Fair Value Measurements and Financial Instruments - Narrative (Details) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2026 USD ($) | Mar. 31, 2025 USD ($) | Dec. 31, 2025 USD ($)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |
Gain (losses) on equity securities still held | $ (20.5) | $ (45.9) |
Financial Royalty Assets, Current |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |
Financial royalty asset, percentage of non-controlling interest | 10.00% |  | 7.00%
Financial Royalty Assets, Non-current |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |
Financial royalty asset, percentage of non-controlling interest | 6.00% |  | 7.00%
Level 3 | Estimate of Fair Value Measurement |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |
Financing receivables, fair value disclosure, current | $ 800.0 |  | $ 900.0
Financing receivables, fair value disclosure, non-current | $ 23,900.0 |  | $ 23,400.0
Level 3 | Measurement Input, Option Volatility |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |
Measurement input | 0.425 |  | 0.425
Level 3 | Measurement Input, Discount Rate | Cytokinetics |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |
Measurement input | 0.118 |  | 0.109

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