Collaborative and Other Relationships Summary of Activity Related to Stoke Therapeutics (Details) - Income Statement Location [Axis]: us-gaap:ResearchAndDevelopmentExpenseExcludingAcquiredInProcessCost - Stoke Therapeutics Inc - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2026 |
Sep. 30, 2025 |
Sep. 30, 2026 |
Sep. 30, 2025 |
|
| Collaborative arrangements and non-collaborative arrangement transactions | ||||
| Expense incurred by the collaboration | $ 28.6 | $ 9.1 | $ 55.1 | $ 21.9 |
| Expense reflected within statements of income | $ 8.5 | $ 2.8 | $ 16.5 | $ 6.6 |