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Remuneration and other benefits paid to the Bank’s directors and senior managers - Schedule summarising remuneration related to multi-annual variable objectives, Directors (Details) € in Thousands | 12 Months Ended
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Dec. 31, 2025 EUR (€) variable_remuneration | Dec. 31, 2024 EUR (€)
Disclosure of transactions between related parties [line items] |  |
Number of years of compensation subject to conditions of continued service | 3 years |
Deferred variable compensation plan linked to multiannual objectives | Chairman and CEO |  |
Disclosure of transactions between related parties [line items] |  |
Variable subject to long-term objectives in cash | € 1,185 |
Variable subject to long-term objectives in shares | 3,170 |
Variable subject to long-term objectives in RSUs | 386 |
Total | € 4,742 | € 3,943
Number of variable long-term employee benefits, deferred remuneration | variable_remuneration | 3 |
Variable long-term employee benefits, deferred remuneration | € 6,774 |
Deferred variable compensation plan linked to multiannual objectives | Chairman and CEO | Ana Botín |  |
Disclosure of transactions between related parties [line items] |  |
Variable subject to long-term objectives in cash | 701 |
Variable subject to long-term objectives in shares | 1,893 |
Variable subject to long-term objectives in RSUs | 210 |
Total | 2,804 | 2,332
Variable long-term employee benefits, deferred remuneration | 4,006 |
Deferred variable compensation plan linked to multiannual objectives | Chairman and CEO | Héctor Grisi |  |
Disclosure of transactions between related parties [line items] |  |
Variable subject to long-term objectives in cash | 484 |
Variable subject to long-term objectives in shares | 1,277 |
Variable subject to long-term objectives in RSUs | 176 |
Total | 1,938 | 1,611
Variable long-term employee benefits, deferred remuneration | 2,768 |
Deferred variable compensation plan linked to multiannual objectives | Senior Management |  |
Disclosure of transactions between related parties [line items] |  |
Variable subject to long-term objectives in cash | 4,521 | 3,485
Variable subject to long-term objectives in shares | 4,522 | 3,486
Total | € 9,043 | € 6,971
Number of variable long-term employee benefits, deferred remuneration | variable_remuneration | 3 |
Variable long-term employee benefits, deferred remuneration | € 12,919 |

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