Collaborative and Other Relationships - Summary of Activity Related To Denali Therapeutics (Details) - Income Statement Location [Axis]: us-gaap:ResearchAndDevelopmentExpenseExcludingAcquiredInProcessCost - Denali Therapeutics - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
|
| Collaborative arrangements and non-collaborative arrangement transactions | ||||
| Expense incurred by the collaboration | $ 5.5 | $ 12.1 | $ 15.8 | $ 24.9 |
| Expense reflected within statements of income | $ 3.3 | $ 7.2 | $ 9.5 | $ 14.9 |