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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

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