v3.26.1
Provisions - Reconciliation (Details)
 12 Months Ended
Dec. 31, 2025
EUR (€)
Reconciliation of changes in other provisions [abstract]  
Beginning of period  
Additional provisions € 52,654,000
Unused amount reversed (712,000)
Amounts used (6,443,000)
End of period 45,499,000
Restructuring Small Molecules Program provision [member]  
Reconciliation of changes in other provisions [abstract]  
Beginning of period  
Additional provisions 36,330,000
Unused amount reversed (712,000)
Amounts used (6,443,000)
End of period 29,175,000
Restructuring cell therapy activities provision [member]  
Reconciliation of changes in other provisions [abstract]  
Beginning of period  
Additional provisions 16,324,000
End of period € 16,324,000