Liability for Sale of Future Revenue - Schedule of Sale of Future Revenue Activity (Details) - USD ($) $ in Millions |
1 Months Ended | 3 Months Ended | 6 Months Ended | |
|---|---|---|---|---|
May 31, 2025 |
Jun. 30, 2025 |
Jun. 30, 2025 |
Jun. 30, 2024 |
|
| Purchase And Sale Agreement [Roll Forward] | ||||
| Royalty revenue | $ (4) | $ 0 | ||
| Interest on liability for sale of future revenue | 7 | $ 0 | ||
| Blackstone Life Sciences and Blackstone Credit & Insurance | ||||
| Purchase And Sale Agreement [Roll Forward] | ||||
| Balance at March 31, 2025 | $ 0 | |||
| Proceeds from sale of future revenue | $ 295 | 295 | ||
| Deferred transaction costs | $ (5) | (5) | ||
| Royalty revenue | (4) | |||
| Interest on liability for sale of future revenue | 7 | |||
| Balance at June 30, 2025 | $ 293 | $ 293 | ||
| Effective interest rate | 16.10% | 16.10% | ||