v3.26.1
Summary of significant transactions - Gilead Collaboration Agreement (Details)
$ in Millions
12 Months Ended
Jan. 08, 2025
item
Aug. 23, 2019
EUR (€)
Aug. 23, 2019
USD ($)
Dec. 31, 2025
EUR (€)
item
Aug. 23, 2019
USD ($)
Jul. 14, 2019
Spin-off            
Summary Of Significant Transaction [line items]            
Number Of Entities Following Spin Off 2          
Gilead collaboration agreement            
Summary Of Significant Transaction [line items]            
Upfront Payment Received   € 3,569,800,000 $ 3,950      
Equity Investment from Gilead.   € 960,100,000     $ 1,100  
Number of Performance Obligations       3    
revenue released. | €       € 1,069,000,000    
Gilead collaboration agreement | Filgotinib drug license | Original Agreement | Gilead            
Summary Of Significant Transaction [line items]            
Cost Share For Global Development Activities           25.00%
Gilead collaboration agreement | Filgotinib drug license | First Revised Agreement | Gilead            
Summary Of Significant Transaction [line items]            
Cost Share For Global Development Activities       50.00%