Collaborative and Other Relationships - Summary of Activity Related to Sage Therapeutics (Details) - Sage Therapeutics - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
|
| Income Statement Location [Axis]: us-gaap:ResearchAndDevelopmentExpenseExcludingAcquiredInProcessCost | ||||
| Collaborative arrangements and non-collaborative arrangement transactions | ||||
| Expense incurred by the collaboration | $ 1.2 | $ 1.5 | $ 2.4 | $ 3.9 |
| Expense reflected within statements of income | 0.6 | 0.8 | 1.2 | 2.0 |
| Income Statement Location [Axis]: us-gaap:SellingGeneralAndAdministrativeExpense | ||||
| Collaborative arrangements and non-collaborative arrangement transactions | ||||
| Expense incurred by the collaboration | 53.3 | 45.7 | 100.8 | 89.2 |
| Expense reflected within statements of income | $ 26.7 | $ 22.9 | $ 50.4 | $ 44.6 |