v3.26.1
Related party transactions - Summary of Remuneration Expenses (Detail) - EUR (€)
€ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Non-Executive Directors [member]      
Disclosure of Remuneration Expenses [Line Items]      
Key management personnel compensation [1] € 1.9 € 1.8 € 1.3
Executive Directors [Member]      
Disclosure of Remuneration Expenses [Line Items]      
Key management personnel compensation [1] 5.4 5.0 0.9
Executive board [member]      
Disclosure of Remuneration Expenses [Line Items]      
Key management personnel compensation [1] 0.0 0.0 4.3
Key management [member]      
Disclosure of Remuneration Expenses [Line Items]      
Key management personnel compensation [1] 32.3 31.9 27.9
Fixed compensation [member]      
Disclosure of Remuneration Expenses [Line Items]      
Key management personnel compensation [1] 11.2 13.7 13.8
Cash based variable compensation [member]      
Disclosure of Remuneration Expenses [Line Items]      
Key management personnel compensation [1] 8.7 6.9 4.6
Share based variable compensation [member]      
Disclosure of Remuneration Expenses [Line Items]      
Key management personnel compensation [1] 9.0 7.4 5.0
Pension contributions [member]      
Disclosure of Remuneration Expenses [Line Items]      
Key management personnel compensation [1] 1.5 2.6 3.1
Other benefits [member]      
Disclosure of Remuneration Expenses [Line Items]      
Key management personnel compensation [1] € 1.9 € 1.3 € 1.3
[1] Key Management is inclusive of Non-Executive Directors, Executive Director (also reported separately above) and Executive Committee Members.