v3.26.1
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
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Assets And Liabilities Classified As Held For Sale [Line Items]      
Tangible assets € 27,438 € 32,087 € 33,882
Total non-current assets held for sale 75,011 4,002 3,014
Other assets 8,719 8,559 8,856
Total Liabilities associated with non-current assets held for sale 62,995 0 0
Assets and liabilities classified as held for sale      
Assets And Liabilities Classified As Held For Sale [Line Items]      
Tangible assets 2,850 2,851 2,991
Total non-current assets held for sale 75,011 4,002 3,014
Other assets 13 14 23
Total Liabilities associated with non-current assets held for sale 62,995 0 0
Assets and liabilities classified as held for sale | Santander Bank Polska S.A. (Note 3)      
Assets And Liabilities Classified As Held For Sale [Line Items]      
Total non-current assets held for sale 0 1,137 0
Assets and liabilities classified as held for sale | Foreclosed assets      
Assets And Liabilities Classified As Held For Sale [Line Items]      
Tangible assets 2,487 2,621 2,773
Assets and liabilities classified as held for sale | Other Tangible Assets      
Assets And Liabilities Classified As Held For Sale [Line Items]      
Tangible assets 363 230 218
Assets and liabilities classified as held for sale | Spain | Foreclosed assets      
Assets And Liabilities Classified As Held For Sale [Line Items]      
Tangible assets 1,705 1,896 2,138
Assets and liabilities classified as held for sale | Total for all subsidiaries | Total for all associates      
Assets And Liabilities Classified As Held For Sale [Line Items]      
Total non-current assets held for sale 72,148 1,137 0
Assets and liabilities classified as held for sale | Santander Bank Polska S.A.      
Assets And Liabilities Classified As Held For Sale [Line Items]      
Total non-current assets held for sale 72,148 0 0
Total Liabilities associated with non-current assets held for sale € 62,995 € 0 € 0