v3.26.1
Related Party Disclosures - Summary of Compensation of Key Management Personnel (Details) - EUR (€)
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Disclosure of transactions between related parties [line items]      
Fringe benefits € 300,000 € 200,000 € 0
Total compensation of key management personnel 8,100,000 13,900,000 8,900,000
Key management personnel compensation, signing bonus 500,000    
Sean Marett      
Disclosure of transactions between related parties [line items]      
Key management personnel compensation, severance 275,000    
Key management personnel compensation, severance additional payment 39,000    
Key management personnel compensation, consultancy agreement payment 477,030    
Ryan Richardson      
Disclosure of transactions between related parties [line items]      
Short-term incentive – first installment(2) 687,500    
Management Board      
Disclosure of transactions between related parties [line items]      
Fixed compensation 3,800,000 4,000,000.0 3,900,000
Short-term incentive – first installment(2) 2,100,000 800,000 700,000
Short-term incentive – second installment 0 600,000 1,000,000.0
Other variable compensation 900,000 1,300,000 800,000
Share-based payments (incl. long-term incentive) (200,000) 6,100,000 1,900,000
Total compensation of key management personnel € 6,900,000 13,000,000.0 8,300,000
Management Board | Jens Holstein      
Disclosure of transactions between related parties [line items]      
Phantom shares awarded (in shares) 4,246    
Management Board | Sean Marett      
Disclosure of transactions between related parties [line items]      
Phantom shares awarded (in shares) 5,760    
Supervisory Board      
Disclosure of transactions between related parties [line items]      
Total compensation of key management personnel € 1,200,000 € 900,000 € 600,000