v3.26.1
Liabilities related to business combinations and to non-controlling interests - Summary of Movements in Liabilities Related to Business Combinations and to Non-Controlling Interests (Details) - EUR (€)
€ in Millions
6 Months Ended
Jun. 30, 2026
Dec. 31, 2025
Changes In Liabilities Related To Business Combinations And Non-Controlling Interests [Roll Forward]    
Beginning balance € 585  
Payments made 0  
Fair value remeasurements through profit or loss: (gain)/loss (including unwinding of discount) 49  
Currency translation differences 18  
Ending balance 652  
Current portion 0 € 0
Non-current portion 652 € 585
Shire contingent consideration arising from acquisition of Translate Bio    
Changes In Liabilities Related To Business Combinations And Non-Controlling Interests [Roll Forward]    
Beginning balance 531  
Payments made 0  
Fair value remeasurements through profit or loss: (gain)/loss (including unwinding of discount) 38  
Currency translation differences 16  
Ending balance 585  
CVRs issued in connection with the acquisition of Blueprint    
Changes In Liabilities Related To Business Combinations And Non-Controlling Interests [Roll Forward]    
Beginning balance 48  
Payments made 0  
Fair value remeasurements through profit or loss: (gain)/loss (including unwinding of discount) 8  
Currency translation differences 2  
Ending balance 58  
CVRs issued in connection with the acquisition of Vigil    
Changes In Liabilities Related To Business Combinations And Non-Controlling Interests [Roll Forward]    
Beginning balance 5  
Payments made 0  
Fair value remeasurements through profit or loss: (gain)/loss (including unwinding of discount) 3  
Currency translation differences 1  
Ending balance 9  
Other    
Changes In Liabilities Related To Business Combinations And Non-Controlling Interests [Roll Forward]    
Beginning balance 1  
Payments made 0  
Fair value remeasurements through profit or loss: (gain)/loss (including unwinding of discount) 0  
Currency translation differences (1)  
Ending balance € 0