v3.25.2
Non-current assets held for sale and liabilities associated with non-current assets held for sale - Schedule of non-current assets classified as held for sale (Details) - EUR (€)
€ in Millions
Jun. 30, 2025
Dec. 31, 2024
Assets And Liabilities Classified As Held For Sale [Line Items]    
Tangible assets € 28,997 € 32,087
Other assets 11,167 8,559
Total Assets associated with non-current assets held for sale 68,710 4,002
Total Liabilities associated with non-current assets held for sale 59,361 0
Assets and liabilities classified as held for sale    
Assets And Liabilities Classified As Held For Sale [Line Items]    
Other assets 12 14
Total Assets associated with non-current assets held for sale 68,710 4,002
Total Liabilities associated with non-current assets held for sale 59,361 0
Assets and liabilities classified as held for sale | Caceis    
Assets And Liabilities Classified As Held For Sale [Line Items]    
Total Assets associated with non-current assets held for sale 0 1,137
Assets and liabilities classified as held for sale | Foreclosed assets    
Assets And Liabilities Classified As Held For Sale [Line Items]    
Tangible assets 2,583 2,621
Assets and liabilities classified as held for sale | Other tangible assets held for sale    
Assets And Liabilities Classified As Held For Sale [Line Items]    
Tangible assets 219 230
Assets and liabilities classified as held for sale | Spain | Foreclosed assets    
Assets And Liabilities Classified As Held For Sale [Line Items]    
Tangible assets 1,860 1,896
Assets and liabilities classified as held for sale | Santander Bank Polska    
Assets And Liabilities Classified As Held For Sale [Line Items]    
Total Assets associated with non-current assets held for sale 65,896 0
Total Liabilities associated with non-current assets held for sale € 59,361 € 0