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Revenues (Tables)
 9 Months Ended
Sep. 30, 2025
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 September 30,Nine Months Ended September 30,
Over timePoint in time2025202420252024
Gilead collaboration      
License and R&D services* $23 $25 $200 $185 
Access rights* 3 5 14 22 
Taiho collaboration      
License revenue*— 15 — 15 
Other*— 3 — 10 
Total revenues  $26 $48 $214 $232 
Total revenues from collaborations$20 $41 $192 $204 
Total revenues from a customer$6 $7 $22 $28 
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 September 30,Nine Months Ended September 30,
2025202420252024
Revenue recognized from amounts in deferred revenue at the beginning of the period$26 $33 $214 $212 
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 obligationsDistinctCombinedAmount
License and R&D services*$192 
R&D services*17
Access rights and option continuation periods*30
Rights to certain studies*17
Total allocated transaction price$256