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Revenues (Tables) | 3 Months Ended
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Mar. 31, 2026
Revenue from Contract with Customer [Abstract] |
Summary of Revenues by Collaboration, Category of Revenue and Method of Recognition | The following table summarizes our revenues by collaboration, category of revenue, and the method of recognition (in millions):
|  |  |  |  |  |  | Three Months Ended March 31,
| Over time |  | Point in time |  |  |  |  |  | 2026 |  | 2025
Gilead Collaboration |  |  |  |  |  |  |  |  |  |  |
License and development services | * |  |  |  |  |  |  |  | $ | 8 |  |  | $ | 20 |
R&D services | * |  |  |  |  |  |  |  | 2 |  |  | 2 |
Access rights | * |  |  |  |  |  |  |  | 3 |  |  | 6 |
Other |  |  | * |  |  |  |  |  | 2 |  |  | — |
Taiho Collaboration |  |  |  |  |  |  |  |  |  |  |
License | * |  |  |  |  |  |  |  | 2 |  |  | — |
Total revenues |  |  |  |  |  |  |  |  | $ | 17 |  |  | $ | 28 |
Total revenues from collaborations |  |  |  |  |  |  |  |  | $ | 10 |  |  | $ | 20 |
Total revenues from a customer |  |  |  |  |  |  |  |  | $ | 7 |  |  | $ | 8 |
Summary of Revenue Recognized as a Result of Changes in Deferred Revenue | The following table summarizes the revenue recognized as a result of changes in the deferred revenue balance (in millions):
|  |  | Three Months Ended March 31,
|  |  |  |  | 2026 |  | 2025
Revenue recognized from amounts in deferred revenue at the beginning of the period |  |  |  |  | $ | 17 |  |  | $ | 28 |
Summary of Transaction Price and Allocation of Transaction Price to the Performance Obligations | The following table summarizes the allocation of the updated transaction price to the remaining unsatisfied and partially satisfied performance obligations (in millions):
Allocation to performance obligations |  | Distinct |  | Combined |  | Amount
License and development services |  |  |  | * |  | $ | 192 |
Development services |  | * |  |  |  | 17 |
Access right and option continuation periods |  | * |  |  |  | 30 |
Rights to certain studies |  | * |  |  |  | 17 |
Total transaction price |  |  |  |  |  | $ | 256 |
The following table summarizes the allocation of the transaction price of $15 million to the performance obligations (in millions):
Allocation to performance obligations |  | Distinct |  | Combined |  | Amount
License |  | * |  |  |  | $ | 7 |
R&D services |  | * |  |  |  | 8 |
Total transaction price |  |  |  |  |  | $ | 15 |

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- Definition Tabular disclosure of receivable, contract asset, and contract liability from contract with customer. Includes, but is not limited to, change in contract asset and contract liability. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 10 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-10 + Details
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- Definition Tabular disclosure of disaggregation of revenue into categories depicting how nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factor. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-5 + Details
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