v3.26.1
Basis of preparation and statement of compliance - Significant investments in subsidiaries (Details)
€ in Millions
12 Months Ended
Sep. 29, 2023
Dec. 31, 2025
EUR (€)
entity
Dec. 31, 2024
Dec. 31, 2023
Basis of preparation and statement of compliance        
Number of entities being consolidated | entity   2    
Hepalys Pharma, Inc        
Basis of preparation and statement of compliance        
Proportion of ownership interest 15.00% 15.00% 15.00% 15.00%
Inventiva Inc.        
Basis of preparation and statement of compliance        
Percent of ownership interest   100.00%    
Non-controlling interest | €   € 0.0