v3.26.1
Related parties (Details)
€ in Millions
3 Months Ended
Jan. 01, 2022
USD ($)
Jun. 30, 2026
EUR (€)
Jun. 30, 2025
EUR (€)
Non-Executive Director      
Disclosure of transactions between related parties [line items]      
Fees and expenses   € 0.1 € 0.1
Chubb Chubb UK&I      
Disclosure of transactions between related parties [line items]      
Outstanding commitments made by entity, related party transactions   3.4  
Chubb Spain      
Disclosure of transactions between related parties [line items]      
Outstanding commitments made by entity, related party transactions   € 1.6  
Mariposa Capital and TOMS Capital | Affiliate of Founder Entities      
Disclosure of transactions between related parties [line items]      
Services Agreement, Annual Fee, Related Party Transactions | $ $ 4