v3.25.2
Other disclosures - Foreclosed real estate assets (Details) - EUR (€)
€ in Millions
Jun. 30, 2025
Dec. 31, 2024
Disclosure of detailed information about investment property [line items]    
Investments accounted for using equity method € 7,191 € 7,277
Foreclosed properties | Spain    
Disclosure of detailed information about investment property [line items]    
Investments accounted for using equity method 23  
Foreclosed equity instruments | Spain    
Disclosure of detailed information about investment property [line items]    
Investments accounted for using equity method € 9