v3.26.1
Income and Expenses - Additional Information (Details) - EUR (€)
€ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Disclosure Of Income And Expenses [Line Items]      
Decrease cost of sales € 100.5 € (58.5)  
Cost of sales (as a percent) 19.00% (10.00%)  
Cost of sales € 641.8 € 541.3 € 599.8
Inventory write-offs 162.8 125.8 94.5
Increase of research and development expense € (149.3) € 471.1  
Research and development expense (as a percent) (7.00%) 26.00%  
Research and development expenses € 2,104.9 € 2,254.2 1,783.1
Increase of sales and marketing expense € 42.1 € 5.2  
Sales and marketing expense (as a percent) 62.00% 8.00%  
Sales and marketing expenses € 110.0 € 67.9 62.7
Increase of general and administrative expense € (16.7) € 36.1  
General and administrative expense (as a percent) (3.00%) 7.00%  
General and administrative expenses € 514.4 € 531.1 € 495.0
Impairment loss recognised in profit or loss 71.6    
Other employee expense 57.0    
Impairment 57.8    
Impairment loss recognised in other comprehensive income, right-of-use assets € 13.8