Consolidated Statements of Operations (Parenthetical) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Revenues	$ 247	$ 258	$ 117
General and administrative expense	110	120	117
Related Party
Research and development expense, net of recoveries	25	(39)	(110)
General and administrative expense	5	2	0
License and development services
Revenues	221	222	80
License and development services | Related Party
Revenues	214	207	75
Other Collaboration Revenue
Revenues	26	36	37
Other Collaboration Revenue | Related Party
Revenues	$ 26	$ 36	$ 37