v3.26.1
Summary of significant transactions - Transfer of Jyseleca Business To Alfasigma (Details) - Jyseleca business, classified as held for sale
12 Months Ended
Dec. 30, 2023
item
Oct. 30, 2023
country
Dec. 31, 2024
EUR (€)
Summary of significant transaction      
Number of positions in European countries agreed to transfer | item 400    
Number of European countries in which positions has been agreed to transfer | country   14  
Upfront payment received     € 50,000,000
Potential Milestone Payments to receive     € 120,000,000