v3.26.1
Commitments and contingencies - Additional Information (Detail) - EUR (€)
Jun. 30, 2026
Dec. 31, 2025
Disclosure of other provisions [abstract]    
Contingent liabilities € 0 € 0
Contingent assets 0 0
Material claims known to management related to the activities of the group 0  
Contractual obligations and commitments € 118,000,000 € 119,200,000