XML 294 R212.htm IDEA: XBRL DOCUMENT
v3.26.1

Marketable debt securities - Disclosure of bonds and debentures by currency (Details) € in Millions, £ in Millions, R$ in Millions, $ in Millions, $ in Millions | Dec. 31, 2025 EUR (€) | Dec. 31, 2025 USD ($) | Dec. 31, 2025 GBP (£) | Dec. 31, 2025 BRL (R$) | Dec. 31, 2025 CLP ($) | Dec. 31, 2024 EUR (€) | Dec. 31, 2023 EUR (€) | Dec. 31, 2022 EUR (€)
--- | --- | --- | --- | --- | --- | --- | --- | ---
Euro |  |  |  |  |  |  |  |
Marketable debt securities |  |  |  |  |  |  |  |
Financial liabilities | € 54,588 |  |  |  |  | € 53,779 | € 53,921 |
US dollar |  |  |  |  |  |  |  |
Marketable debt securities |  |  |  |  |  |  |  |
Financial liabilities | 43,466 |  |  |  |  | 57,992 | 49,447 |
Pound sterling |  |  |  |  |  |  |  |
Marketable debt securities |  |  |  |  |  |  |  |
Financial liabilities | 13,625 |  |  |  |  | 21,853 | 27,697 |
Brazilian real |  |  |  |  |  |  |  |
Marketable debt securities |  |  |  |  |  |  |  |
Financial liabilities | 6,783 |  |  |  |  | 7,459 | 7,997 |
Other currencies |  |  |  |  |  |  |  |
Marketable debt securities |  |  |  |  |  |  |  |
Financial liabilities | 18,725 |  |  |  |  | 16,794 | 19,580 |
Marketable debt securities |  |  |  |  |  |  |  |
Marketable debt securities |  |  |  |  |  |  |  |
Financial liabilities | 324,390 |  |  |  |  | 325,521 | 308,579 |
Marketable debt securities | Bonds and debentures outstanding |  |  |  |  |  |  |  |
Marketable debt securities |  |  |  |  |  |  |  |
Financial liabilities | 253,893 |  |  |  |  | 252,765 | 231,880 | € 211,597
Marketable debt securities | Bonds and debentures outstanding | Euro |  |  |  |  |  |  |  |
Marketable debt securities |  |  |  |  |  |  |  |
Financial liabilities | € 117,350 |  |  |  |  | 110,973 | 101,657 |
Annual interest rate (as a percent) | 2.72% | 2.72% | 2.72% | 2.72% | 2.72% |  |  |
Marketable debt securities | Bonds and debentures outstanding | US dollar |  |  |  |  |  |  |  |
Marketable debt securities |  |  |  |  |  |  |  |
Financial liabilities | € 71,140 | $ 83,632 |  |  |  | 79,740 | 70,229 |
Annual interest rate (as a percent) | 4.73% | 4.73% | 4.73% | 4.73% | 4.73% |  |  |
Marketable debt securities | Bonds and debentures outstanding | Pound sterling |  |  |  |  |  |  |  |
Marketable debt securities |  |  |  |  |  |  |  |
Financial liabilities | € 25,548 |  | £ 22,301 |  |  | 23,961 | 20,520 |
Annual interest rate (as a percent) | 5.14% | 5.14% | 5.14% | 5.14% | 5.14% |  |  |
Marketable debt securities | Bonds and debentures outstanding | Brazilian real |  |  |  |  |  |  |  |
Marketable debt securities |  |  |  |  |  |  |  |
Financial liabilities | € 21,848 |  |  | R$ 141,089 |  | 18,683 | 21,861 |
Annual interest rate (as a percent) | 14.21% | 14.21% | 14.21% | 14.21% | 14.21% |  |  |
Marketable debt securities | Bonds and debentures outstanding | Chilean peso |  |  |  |  |  |  |  |
Marketable debt securities |  |  |  |  |  |  |  |
Financial liabilities | € 4,697 |  |  |  | $ 4,977,648 | 4,579 | 4,921 |
Annual interest rate (as a percent) | 3.61% | 3.61% | 3.61% | 3.61% | 3.61% |  |  |
Marketable debt securities | Bonds and debentures outstanding | Other currencies |  |  |  |  |  |  |  |
Marketable debt securities |  |  |  |  |  |  |  |
Financial liabilities | € 13,310 |  |  |  |  | € 14,829 | € 12,692 |

X
- Definition The interest rate on borrowings. [Refer: Borrowings] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IFRS -Number 7 -IssueDate 2025-01-01 -Paragraph 7 -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2025-en-r&anchor=para_7&doctype=Standard -URIDate 2025-03-27 + Details
Name: | ifrs-full_BorrowingsInterestRate
Namespace Prefix: | ifrs-full_
Data Type: | dtr-2022:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table. + References No definition available. + Details
Name: | ifrs-full_DisclosureOfFinancialLiabilitiesLineItems
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount of liabilities that are: (a) a contractual obligation: (i) to deliver cash or another financial asset to another entity; or (ii) to exchange financial assets or financial liabilities with another entity under conditions that are potentially unfavourable to the entity; or (b) a contract that will, or may be, settled in the entity’s own equity instruments and is: (i) a non-derivative for which the entity is, or may be, obliged to deliver a variable number of the entity’s own equity instruments; or (ii) a derivative that will, or may be, settled other than by the exchange of a fixed amount of cash or another financial asset for a fixed number of the entity’s own equity instruments. For this purpose, rights, options or warrants to acquire a fixed number of the entity’s own equity instruments for a fixed amount of any currency are equity instruments if the entity offers the rights, options or warrants pro rata to all of its existing owners of the same class of its own non-derivative equity instruments. Also, for those purposes the entity’s own equity instruments do not include puttable financial instruments that are classified as equity instruments in accordance with paragraphs 16A-16B of IAS 32, instruments that impose on the entity an obligation to deliver to another party a pro rata share of the net assets of the entity only on liquidation and are classified as equity instruments in accordance with paragraphs 16C-16D of IAS 32, or instruments that are contracts for the future receipt or delivery of the entity’s own equity instruments. As an exception, an instrument that meets the definition of a financial liability is classified as an equity instrument if it has all the features and meets the conditions in paragraphs 16A-16B or paragraphs 16C-16D of IAS 32. [Refer: Classes of financial instruments [domain]; Financial assets; Derivatives [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2025-01-01 -Paragraph 25 -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2025-en-r&anchor=para_25&doctype=Standard -URIDate 2025-03-27 + Details
Name: | ifrs-full_FinancialLiabilities
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | srt_CurrencyAxis=currency_EUR
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_CurrencyAxis=currency_USD
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_CurrencyAxis=currency_GBP
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_CurrencyAxis=currency_BRL
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_CurrencyAxis=san_OtherCurrenciesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfFinancialLiabilitiesAxis=san_DebtInstrumentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfLiabilitiesAxis=san_BondsAndDebenturesOutstandingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_CurrencyAxis=currency_CLP
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |