Revenues (Tables)

9 Months Ended

Sep. 30, 2023

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 time	Point in time	2023		2022		2023		2022
Gilead Collaboration
License and R&D services	*		$	20	$	23	$	57	$	48
Access rights	*		8		8		25		25
Taiho Collaboration
R&D services	*		4		—		4		—
Access rights	*		—		2		—		5
Total revenues			$	32	$	33	$	86	$	78

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,
	2023		2022		2023		2022
Revenue recognized from amounts included in deferred revenue at the beginning of the period	$	28	$	33	$	79	$	78

Summary of Transaction Price and Allocation of Transaction Price to the Performance Obligations

The following table summarizes the allocation of the transaction price to the distinct performance obligations (in millions):

Allocation to performance obligations	Distinct	Amount
Inflammation target 1	*	$	18
Inflammation target 2	*	17
Total allocated transaction price		$	35