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Interest expense (Tables) | 12 Months Ended
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Dec. 31, 2025
Analysis of income and expense [abstract] |
Disclosure of details of main interest and similar expenses | The detail of the main items of interest expense and similar charges accrued in 2025, 2024 and 2023 is as follows:
EUR million
| 2025 | 2024 | 2023
Customer deposits | 31,735 |  | 35,714 |  | 32,457 |
Debt securities issued and subordinated liabilities | 15,066 |  | 14,612 |  | 12,671 |
Marketable debt securities | 13,580 |  | 13,255 |  | 11,661 |
Subordinated liabilities (note 23) | 1,486 |  | 1,357 |  | 1,010 |
Central banks and credit institution deposits | 8,151 |  | 9,381 |  | 9,360 |
Lease Liabilities | 107 |  | 122 |  | 127 |
Provisions for pensions (note 25) | 91 |  | 105 |  | 93 |
Other interest expense | 4,212 |  | 5,291 |  | 6,384 |
| 59,362 |  | 65,225 |  | 61,092 |

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