Revenues (Tables)

3 Months Ended

Mar. 31, 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 March 31,
	Over time	Point in time	2023		2022
Gilead Collaboration
License and R&D services	*			17		8
Access rights	*			8		8
Taiho Collaboration
Access rights	*			-		2
Total revenues			$	25	$	18

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,
	2023		2022
Revenue recognized from amounts included in deferred revenue at the beginning of the period	$	25	$	18