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, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
|
| Liability For Sale Of Future Revenue [Roll Forward] | |||||
| Royalty revenue | $ (18) | $ (4) | |||
| Imputed interest expense | 29 | 7 | |||
| Blackstone Life Sciences and Blackstone Credit & Insurance | |||||
| Liability For Sale Of Future Revenue [Roll Forward] | |||||
| Beginning balance | 304 | 0 | |||
| Proceeds from sale of future revenue | $ 295 | 0 | 295 | ||
| Deferred transaction costs | 0 | (5) | |||
| Royalty revenue | $ (9) | $ (4) | (18) | (4) | |
| Imputed interest expense | 29 | 7 | |||
| Ending balance | $ 315 | $ 293 | $ 315 | $ 293 | |
| Effective interest rate | 18.30% | 16.10% | 18.30% | 16.10% | |