Collaborative and Other Relationships - Summary of Activity Related to BAN2401 and Elenbecestat Collaboration (Details) - E2609 and BAN2401 - Eisai - USD ($) $ in Millions |
3 Months Ended | |
|---|---|---|
Mar. 31, 2024 |
Mar. 31, 2023 |
|
| Collaborative arrangements and non-collaborative arrangement transactions | ||
| Total development expense incurred by the collaboration related to the advancement of LEQEMBI | $ 87.3 | $ 107.9 |
| Expense reflected within statements of income | 43.6 | 54.0 |
| Selling, general and administrative | ||
| Collaborative arrangements and non-collaborative arrangement transactions | ||
| Expense reflected within statements of income | 86.9 | 5.3 |
| Expense incurred by the collaboration | $ 173.9 | $ 10.5 |