v3.26.3
Shareholders’ equity - Change in share capital (Details)
6 Months Ended
Jul. 28, 2025
$ / shares
shares
Jun. 30, 2026
shares
€ / shares
May 07, 2026
$ / shares
shares
May 07, 2026
€ / shares
shares
Apr. 30, 2026
Dec. 31, 2025
shares
Jul. 28, 2025
€ / shares
Jul. 23, 2025
Jun. 30, 2025
shares
Dec. 31, 2024
shares
Disclosure of classes of share capital [line items]                    
Number of shares issued (in shares)   79,817,069       78,536,412     63,471,933 63,347,837
Closing foreign exchange rate   1.1394     1.1702     1.1726    
Increase in number of shares issued (in shares)   877,310                
Par value per share (in euro per share) | € / shares   € 0.01                
ADS                    
Disclosure of classes of share capital [line items]                    
Number of shares issued (in shares)     403,347 403,347            
Issue of equity, offering price per share (in dollar/euro per share) | $ / shares $ 64.00   $ 111.57              
Increase in number of shares issued (in shares) 11,679,400                  
Ordinary shares                    
Disclosure of classes of share capital [line items]                    
Issue of equity, offering price per share (in dollar/euro per share) | € / shares       € 95.34     € 54.58      
AGAs                    
Disclosure of classes of share capital [line items]                    
Number of instruments exercised (in shares)   858,370                
Increase in number of shares issued (in shares)   858,370                
BCEs                    
Disclosure of classes of share capital [line items]                    
Number of instruments exercised (in shares)   2,540                
Increase in number of shares issued (in shares)   2,540                
BSAs                    
Disclosure of classes of share capital [line items]                    
Number of instruments exercised (in shares)   16,400                
Increase in number of shares issued (in shares)   16,400