v3.26.1
Business Segment - Summary of Segment Reporting Information (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Mar. 31, 2026
Jun. 30, 2025
Mar. 31, 2025
Jun. 30, 2026
Jun. 30, 2025
Segment Reporting [Line Items]            
Total revenues $ 41   $ 160   $ 58 $ 188
Adjusted for expense (income):            
Interest income, net 3   2   6 3
Net income (loss) (91) $ (128) 0 $ (112) (219) (112)
Reportable segment            
Segment Reporting [Line Items]            
Total revenues 41   160   58 188
Adjusted for expense (income):            
Late-stage development programs 51   74   111 129
Early-stage development and preclinical programs 21   38   39 80
Compensation and personnel costs 58   61   129 128
Depreciation and amortization 2   2   5 5
Interest income, net (5)   (8)   (11) (18)
Other segment items 22   26   40 47
Partnership reimbursements (17)   (33)   (36) (71)
Net income (loss) $ (91)   $ 0   $ (219) $ (112)