Consolidated Statements of Cash Flows (Parenthetical) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Receivable from collaboration partners	$ 15	$ 704	$ (17)
Other assets	(14)	2	(3)
Deferred revenue	(68)	(112)	(368)
Proceeds from issuance of common stock	25	0	220
Related Party
Receivable from collaboration partners	19	704	(17)
Other assets	4	2	0
Deferred revenue	(77)	(107)	(361)
Proceeds from issuance of common stock	$ 20	$ 0	$ 220