Additional disclosures - Parent company condensed balance sheets (Details) - EUR (€) € in Millions |
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
Dec. 31, 2022 |
|---|---|---|---|---|
| ASSETS | ||||
| Cash equivalents at central banks | € 135,330 | € 170,914 | € 199,932 | |
| Financial assets held for trading | 252,318 | 230,253 | 176,921 | |
| Premises and equipment, net | 26,416 | 31,212 | 32,926 | |
| Other assets | 8,719 | 8,559 | 8,856 | |
| TOTAL ASSETS | 1,867,515 | 1,837,081 | 1,797,062 | |
| LIABILITIES | ||||
| Other liabilities | 15,937 | 16,344 | 17,598 | |
| TOTAL LIABILITIES | 1,754,767 | 1,729,754 | 1,692,821 | |
| EQUITY | ||||
| Capital stock | 7,345 | 7,576 | 8,092 | € 8,397 |
| TOTAL EQUITY | 112,748 | 107,327 | 104,241 | € 97,585 |
| TOTAL LIABILITIES AND EQUITY | 1,867,515 | 1,837,081 | 1,797,062 | |
| Banco Santander, S.A. | Reportable Legal Entities | ||||
| ASSETS | ||||
| Cash equivalents at central banks | 144,292 | 157,665 | 172,524 | |
| Financial assets held for trading | 154,939 | 135,758 | 102,296 | |
| Investment securities | 91,217 | 77,230 | 63,325 | |
| Net loans and leases | 323,253 | 301,937 | 298,068 | |
| Investment in affiliated companies | 98,317 | 100,045 | 99,326 | |
| Premises and equipment, net | 5,825 | 6,219 | 6,368 | |
| Other assets | 18,941 | 15,986 | 15,435 | |
| TOTAL ASSETS | 836,784 | 794,840 | 757,342 | |
| LIABILITIES | ||||
| Deposits | 415,898 | 393,787 | 398,374 | |
| Short-term debt | 129,462 | 88,263 | 70,771 | |
| Long-term debt | 114,756 | 137,549 | 129,258 | |
| Total debt | 244,218 | 225,812 | 200,029 | |
| Other liabilities | 94,325 | 96,909 | 84,065 | |
| TOTAL LIABILITIES | 754,441 | 716,508 | 682,468 | |
| EQUITY | ||||
| Capital stock | 7,345 | 7,576 | 8,092 | |
| Retained earnings and other reserves | 74,998 | 70,756 | 66,782 | |
| TOTAL EQUITY | 82,343 | 78,332 | 74,874 | |
| TOTAL LIABILITIES AND EQUITY | 836,784 | 794,840 | 757,342 | |
| Banco Santander, S.A. | Reportable Legal Entities | Bank subsidiaries | ||||
| ASSETS | ||||
| Cash equivalents at central banks | 11,517 | 5,952 | 6,834 | |
| Investment securities | 13,607 | 16,191 | 16,137 | |
| Investment in affiliated companies | 71,796 | 74,624 | 74,016 | |
| LIABILITIES | ||||
| Deposits | 8,773 | 6,645 | 7,832 | |
| Total debt | 3,994 | 100 | 0 | |
| Banco Santander, S.A. | Reportable Legal Entities | Non-bank subsidiaries | ||||
| ASSETS | ||||
| Investment securities | 1,697 | 1,005 | 1,229 | |
| Net loans and leases | 23,340 | 21,127 | 22,435 | |
| Investment in affiliated companies | 26,521 | 25,421 | 25,310 | |
| LIABILITIES | ||||
| Deposits | 26,412 | 19,176 | 14,610 | |
| Total debt | € 1,363 | € 2,428 | € 1,816 |
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- Definition The amount of a present economic resource controlled by the entity as a result of past events. Economic resource is a right that has the potential to produce economic benefits. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The amount of outstanding funds that the entity is obligated to repay. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition The amount of cash and bank balances held at central banks. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition The amount of financial assets at fair value through profit or loss classified as held for trading. A financial asset is classified as held for trading if: (a) it is acquired principally for the purpose of selling it in the near term; (b) on initial recognition it is part of a portfolio of identified financial instruments that are managed together and for which there is evidence of a recent actual pattern of short-term profit-taking; or (c) it is a derivative (except for a derivative that is a financial guarantee contract or a designated and effective hedging instrument). [Refer: At fair value [member]; Financial assets at fair value through profit or loss, mandatorily measured at fair value] Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition The amount of investments in subsidiaries, joint ventures and associates in an entity's separate financial statements. [Refer: Total for all associates [member]; Total for all joint ventures [member]; Total for all subsidiaries [member]; Investments in subsidiaries reported in separate financial statements] Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The nominal value of capital issued. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition The amount of a present obligation of the entity to transfer an economic resource as a result of past events. Economic resource is a right that has the potential to produce economic benefits. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The non-current portion of non-current borrowings. [Refer: Borrowings] Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition The amount of assets that the entity does not separately disclose in the same statement or note. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition The amount of liabilities that the entity does not separately disclose in the same statement or note. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition The amount of property, plant and equipment including right-of-use assets whose underlying assets would be presented as property, plant and equipment if they were owned. [Refer: Property, plant and equipment; Right-of-use assets] Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition The amount of current borrowings. [Refer: Borrowings] Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition The amount of liability for deposits held by the entity. No definition available.
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- Definition Investment Securities No definition available.
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- Definition Loans And Leases, Net No definition available.
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- Definition A component of equity representing the entity's cumulative undistributed earnings or deficit and other reserves. No definition available.
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