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Loans and advances to customers - Schedule of loans and advances to customers in detail by activity (Details) - EUR (€) € in Millions | Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023
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Loans And Advances To Customers [Line Items] |  |  |
Loans to customers, net of impairment losses | € 1,015,198 |  |
Refinanced and restructured transactions | 18,151 |  |
Advances to customers | 22,090 |  |
Financial assets | 300,026 | € 283,497 | € 243,203
Customers |  |  |
Loans And Advances To Customers [Line Items] |  |  |
Financial assets | 1,037,288 | € 1,054,069 | € 1,036,349
Less than or equal to 40% |  |  |
Loans And Advances To Customers [Line Items] |  |  |
Loans to customers, net of impairment losses | 126,703 |  |
Refinanced and restructured transactions | 2,347 |  |
More than 40% and less than or equal to 60% |  |  |
Loans And Advances To Customers [Line Items] |  |  |
Loans to customers, net of impairment losses | 155,022 |  |
Refinanced and restructured transactions | 2,381 |  |
More than 60% and less than or equal to 80% |  |  |
Loans And Advances To Customers [Line Items] |  |  |
Loans to customers, net of impairment losses | 132,918 |  |
Refinanced and restructured transactions | 2,037 |  |
More than 80% and less than or equal to 100% |  |  |
Loans And Advances To Customers [Line Items] |  |  |
Loans to customers, net of impairment losses | 178,789 |  |
Refinanced and restructured transactions | 2,457 |  |
More than 100% |  |  |
Loans And Advances To Customers [Line Items] |  |  |
Loans to customers, net of impairment losses | 62,224 |  |
Refinanced and restructured transactions | 3,383 |  |
Public sector |  |  |
Loans And Advances To Customers [Line Items] |  |  |
Loans to customers, net of impairment losses | 29,607 |  |
Public sector | Less than or equal to 40% |  |  |
Loans And Advances To Customers [Line Items] |  |  |
Loans to customers, net of impairment losses | 157 |  |
Public sector | More than 40% and less than or equal to 60% |  |  |
Loans And Advances To Customers [Line Items] |  |  |
Loans to customers, net of impairment losses | 168 |  |
Public sector | More than 60% and less than or equal to 80% |  |  |
Loans And Advances To Customers [Line Items] |  |  |
Loans to customers, net of impairment losses | 251 |  |
Public sector | More than 80% and less than or equal to 100% |  |  |
Loans And Advances To Customers [Line Items] |  |  |
Loans to customers, net of impairment losses | 334 |  |
Public sector | More than 100% |  |  |
Loans And Advances To Customers [Line Items] |  |  |
Loans to customers, net of impairment losses | 274 |  |
Other financial institutions (financial business activity) |  |  |
Loans And Advances To Customers [Line Items] |  |  |
Loans to customers, net of impairment losses | 124,684 |  |
Other financial institutions (financial business activity) | Less than or equal to 40% |  |  |
Loans And Advances To Customers [Line Items] |  |  |
Loans to customers, net of impairment losses | 2,045 |  |
Other financial institutions (financial business activity) | More than 40% and less than or equal to 60% |  |  |
Loans And Advances To Customers [Line Items] |  |  |
Loans to customers, net of impairment losses | 995 |  |
Other financial institutions (financial business activity) | More than 60% and less than or equal to 80% |  |  |
Loans And Advances To Customers [Line Items] |  |  |
Loans to customers, net of impairment losses | 424 |  |
Other financial institutions (financial business activity) | More than 80% and less than or equal to 100% |  |  |
Loans And Advances To Customers [Line Items] |  |  |
Loans to customers, net of impairment losses | 77,935 |  |
Other financial institutions (financial business activity) | More than 100% |  |  |
Loans And Advances To Customers [Line Items] |  |  |
Loans to customers, net of impairment losses | 598 |  |
Non-financial corporations and individual entrepreneurs (non-financial business activity) |  |  |
Loans And Advances To Customers [Line Items] |  |  |
Loans to customers, net of impairment losses | 318,284 |  |
Non-financial corporations and individual entrepreneurs (non-financial business activity) | Less than or equal to 40% |  |  |
Loans And Advances To Customers [Line Items] |  |  |
Loans to customers, net of impairment losses | 23,917 |  |
Non-financial corporations and individual entrepreneurs (non-financial business activity) | More than 40% and less than or equal to 60% |  |  |
Loans And Advances To Customers [Line Items] |  |  |
Loans to customers, net of impairment losses | 26,942 |  |
Non-financial corporations and individual entrepreneurs (non-financial business activity) | More than 60% and less than or equal to 80% |  |  |
Loans And Advances To Customers [Line Items] |  |  |
Loans to customers, net of impairment losses | 19,168 |  |
Non-financial corporations and individual entrepreneurs (non-financial business activity) | More than 80% and less than or equal to 100% |  |  |
Loans And Advances To Customers [Line Items] |  |  |
Loans to customers, net of impairment losses | 45,306 |  |
Non-financial corporations and individual entrepreneurs (non-financial business activity) | More than 100% |  |  |
Loans And Advances To Customers [Line Items] |  |  |
Loans to customers, net of impairment losses | 23,422 |  |
Households - other |  |  |
Loans And Advances To Customers [Line Items] |  |  |
Loans to customers, net of impairment losses | 542,623 |  |
Households - other | Less than or equal to 40% |  |  |
Loans And Advances To Customers [Line Items] |  |  |
Loans to customers, net of impairment losses | 100,584 |  |
Households - other | More than 40% and less than or equal to 60% |  |  |
Loans And Advances To Customers [Line Items] |  |  |
Loans to customers, net of impairment losses | 126,917 |  |
Households - other | More than 60% and less than or equal to 80% |  |  |
Loans And Advances To Customers [Line Items] |  |  |
Loans to customers, net of impairment losses | 113,075 |  |
Households - other | More than 80% and less than or equal to 100% |  |  |
Loans And Advances To Customers [Line Items] |  |  |
Loans to customers, net of impairment losses | 55,214 |  |
Households - other | More than 100% |  |  |
Loans And Advances To Customers [Line Items] |  |  |
Loans to customers, net of impairment losses | 37,930 |  |
Without collateral |  |  |
Loans And Advances To Customers [Line Items] |  |  |
Loans to customers, net of impairment losses | 359,542 |  |
Refinanced and restructured transactions | 5,546 |  |
Without collateral | Public sector |  |  |
Loans And Advances To Customers [Line Items] |  |  |
Loans to customers, net of impairment losses | 28,423 |  |
Without collateral | Other financial institutions (financial business activity) |  |  |
Loans And Advances To Customers [Line Items] |  |  |
Loans to customers, net of impairment losses | 42,687 |  |
Without collateral | Non-financial corporations and individual entrepreneurs (non-financial business activity) |  |  |
Loans And Advances To Customers [Line Items] |  |  |
Loans to customers, net of impairment losses | 179,529 |  |
Without collateral | Households - other |  |  |
Loans And Advances To Customers [Line Items] |  |  |
Loans to customers, net of impairment losses | 108,903 |  |
Of which property collateral |  |  |
Loans And Advances To Customers [Line Items] |  |  |
Loans to customers, net of impairment losses | 404,014 |  |
Refinanced and restructured transactions | 6,896 |  |
Of which property collateral | Public sector |  |  |
Loans And Advances To Customers [Line Items] |  |  |
Loans to customers, net of impairment losses | 153 |  |
Of which property collateral | Other financial institutions (financial business activity) |  |  |
Loans And Advances To Customers [Line Items] |  |  |
Loans to customers, net of impairment losses | 1,959 |  |
Of which property collateral | Non-financial corporations and individual entrepreneurs (non-financial business activity) |  |  |
Loans And Advances To Customers [Line Items] |  |  |
Loans to customers, net of impairment losses | 63,124 |  |
Of which property collateral | Households - other |  |  |
Loans And Advances To Customers [Line Items] |  |  |
Loans to customers, net of impairment losses | 338,778 |  |
Of which other collateral |  |  |
Loans And Advances To Customers [Line Items] |  |  |
Loans to customers, net of impairment losses | 251,642 |  |
Refinanced and restructured transactions | 5,709 |  |
Of which other collateral | Public sector |  |  |
Loans And Advances To Customers [Line Items] |  |  |
Loans to customers, net of impairment losses | 1,031 |  |
Of which other collateral | Other financial institutions (financial business activity) |  |  |
Loans And Advances To Customers [Line Items] |  |  |
Loans to customers, net of impairment losses | 80,038 |  |
Of which other collateral | Non-financial corporations and individual entrepreneurs (non-financial business activity) |  |  |
Loans And Advances To Customers [Line Items] |  |  |
Loans to customers, net of impairment losses | 75,631 |  |
Of which other collateral | Households - other |  |  |
Loans And Advances To Customers [Line Items] |  |  |
Loans to customers, net of impairment losses | 94,942 |  |
Construction and property development | Non-financial corporations and individual entrepreneurs (non-financial business activity) |  |  |
Loans And Advances To Customers [Line Items] |  |  |
Loans to customers, net of impairment losses | 17,118 |  |
Construction and property development | Non-financial corporations and individual entrepreneurs (non-financial business activity) | Less than or equal to 40% |  |  |
Loans And Advances To Customers [Line Items] |  |  |
Loans to customers, net of impairment losses | 4,963 |  |
Construction and property development | Non-financial corporations and individual entrepreneurs (non-financial business activity) | More than 40% and less than or equal to 60% |  |  |
Loans And Advances To Customers [Line Items] |  |  |
Loans to customers, net of impairment losses | 6,921 |  |
Construction and property development | Non-financial corporations and individual entrepreneurs (non-financial business activity) | More than 60% and less than or equal to 80% |  |  |
Loans And Advances To Customers [Line Items] |  |  |
Loans to customers, net of impairment losses | 1,890 |  |
Construction and property development | Non-financial corporations and individual entrepreneurs (non-financial business activity) | More than 80% and less than or equal to 100% |  |  |
Loans And Advances To Customers [Line Items] |  |  |
Loans to customers, net of impairment losses | 1,164 |  |
Construction and property development | Non-financial corporations and individual entrepreneurs (non-financial business activity) | More than 100% |  |  |
Loans And Advances To Customers [Line Items] |  |  |
Loans to customers, net of impairment losses | 886 |  |
Construction and property development | Without collateral | Non-financial corporations and individual entrepreneurs (non-financial business activity) |  |  |
Loans And Advances To Customers [Line Items] |  |  |
Loans to customers, net of impairment losses | 1,294 |  |
Construction and property development | Of which property collateral | Non-financial corporations and individual entrepreneurs (non-financial business activity) |  |  |
Loans And Advances To Customers [Line Items] |  |  |
Loans to customers, net of impairment losses | 15,594 |  |
Construction and property development | Of which other collateral | Non-financial corporations and individual entrepreneurs (non-financial business activity) |  |  |
Loans And Advances To Customers [Line Items] |  |  |
Loans to customers, net of impairment losses | 230 |  |
Civil engineering construction | Non-financial corporations and individual entrepreneurs (non-financial business activity) |  |  |
Loans And Advances To Customers [Line Items] |  |  |
Loans to customers, net of impairment losses | 2,522 |  |
Civil engineering construction | Non-financial corporations and individual entrepreneurs (non-financial business activity) | Less than or equal to 40% |  |  |
Loans And Advances To Customers [Line Items] |  |  |
Loans to customers, net of impairment losses | 93 |  |
Civil engineering construction | Non-financial corporations and individual entrepreneurs (non-financial business activity) | More than 40% and less than or equal to 60% |  |  |
Loans And Advances To Customers [Line Items] |  |  |
Loans to customers, net of impairment losses | 84 |  |
Civil engineering construction | Non-financial corporations and individual entrepreneurs (non-financial business activity) | More than 60% and less than or equal to 80% |  |  |
Loans And Advances To Customers [Line Items] |  |  |
Loans to customers, net of impairment losses | 39 |  |
Civil engineering construction | Non-financial corporations and individual entrepreneurs (non-financial business activity) | More than 80% and less than or equal to 100% |  |  |
Loans And Advances To Customers [Line Items] |  |  |
Loans to customers, net of impairment losses | 470 |  |
Civil engineering construction | Non-financial corporations and individual entrepreneurs (non-financial business activity) | More than 100% |  |  |
Loans And Advances To Customers [Line Items] |  |  |
Loans to customers, net of impairment losses | 104 |  |
Civil engineering construction | Without collateral | Non-financial corporations and individual entrepreneurs (non-financial business activity) |  |  |
Loans And Advances To Customers [Line Items] |  |  |
Loans to customers, net of impairment losses | 1,732 |  |
Civil engineering construction | Of which property collateral | Non-financial corporations and individual entrepreneurs (non-financial business activity) |  |  |
Loans And Advances To Customers [Line Items] |  |  |
Loans to customers, net of impairment losses | 19 |  |
Civil engineering construction | Of which other collateral | Non-financial corporations and individual entrepreneurs (non-financial business activity) |  |  |
Loans And Advances To Customers [Line Items] |  |  |
Loans to customers, net of impairment losses | 771 |  |
Large companies | Non-financial corporations and individual entrepreneurs (non-financial business activity) |  |  |
Loans And Advances To Customers [Line Items] |  |  |
Loans to customers, net of impairment losses | 181,870 |  |
Large companies | Non-financial corporations and individual entrepreneurs (non-financial business activity) | Less than or equal to 40% |  |  |
Loans And Advances To Customers [Line Items] |  |  |
Loans to customers, net of impairment losses | 7,177 |  |
Large companies | Non-financial corporations and individual entrepreneurs (non-financial business activity) | More than 40% and less than or equal to 60% |  |  |
Loans And Advances To Customers [Line Items] |  |  |
Loans to customers, net of impairment losses | 6,666 |  |
Large companies | Non-financial corporations and individual entrepreneurs (non-financial business activity) | More than 60% and less than or equal to 80% |  |  |
Loans And Advances To Customers [Line Items] |  |  |
Loans to customers, net of impairment losses | 6,157 |  |
Large companies | Non-financial corporations and individual entrepreneurs (non-financial business activity) | More than 80% and less than or equal to 100% |  |  |
Loans And Advances To Customers [Line Items] |  |  |
Loans to customers, net of impairment losses | 25,459 |  |
Large companies | Non-financial corporations and individual entrepreneurs (non-financial business activity) | More than 100% |  |  |
Loans And Advances To Customers [Line Items] |  |  |
Loans to customers, net of impairment losses | 7,909 |  |
Large companies | Without collateral | Non-financial corporations and individual entrepreneurs (non-financial business activity) |  |  |
Loans And Advances To Customers [Line Items] |  |  |
Loans to customers, net of impairment losses | 128,502 |  |
Large companies | Of which property collateral | Non-financial corporations and individual entrepreneurs (non-financial business activity) |  |  |
Loans And Advances To Customers [Line Items] |  |  |
Loans to customers, net of impairment losses | 17,718 |  |
Large companies | Of which other collateral | Non-financial corporations and individual entrepreneurs (non-financial business activity) |  |  |
Loans And Advances To Customers [Line Items] |  |  |
Loans to customers, net of impairment losses | 35,650 |  |
SMEs and individual entrepreneurs | Non-financial corporations and individual entrepreneurs (non-financial business activity) |  |  |
Loans And Advances To Customers [Line Items] |  |  |
Loans to customers, net of impairment losses | 116,774 |  |
SMEs and individual entrepreneurs | Non-financial corporations and individual entrepreneurs (non-financial business activity) | Less than or equal to 40% |  |  |
Loans And Advances To Customers [Line Items] |  |  |
Loans to customers, net of impairment losses | 11,684 |  |
SMEs and individual entrepreneurs | Non-financial corporations and individual entrepreneurs (non-financial business activity) | More than 40% and less than or equal to 60% |  |  |
Loans And Advances To Customers [Line Items] |  |  |
Loans to customers, net of impairment losses | 13,271 |  |
SMEs and individual entrepreneurs | Non-financial corporations and individual entrepreneurs (non-financial business activity) | More than 60% and less than or equal to 80% |  |  |
Loans And Advances To Customers [Line Items] |  |  |
Loans to customers, net of impairment losses | 11,082 |  |
SMEs and individual entrepreneurs | Non-financial corporations and individual entrepreneurs (non-financial business activity) | More than 80% and less than or equal to 100% |  |  |
Loans And Advances To Customers [Line Items] |  |  |
Loans to customers, net of impairment losses | 18,213 |  |
SMEs and individual entrepreneurs | Non-financial corporations and individual entrepreneurs (non-financial business activity) | More than 100% |  |  |
Loans And Advances To Customers [Line Items] |  |  |
Loans to customers, net of impairment losses | 14,523 |  |
SMEs and individual entrepreneurs | Without collateral | Non-financial corporations and individual entrepreneurs (non-financial business activity) |  |  |
Loans And Advances To Customers [Line Items] |  |  |
Loans to customers, net of impairment losses | 48,001 |  |
SMEs and individual entrepreneurs | Of which property collateral | Non-financial corporations and individual entrepreneurs (non-financial business activity) |  |  |
Loans And Advances To Customers [Line Items] |  |  |
Loans to customers, net of impairment losses | 29,793 |  |
SMEs and individual entrepreneurs | Of which other collateral | Non-financial corporations and individual entrepreneurs (non-financial business activity) |  |  |
Loans And Advances To Customers [Line Items] |  |  |
Loans to customers, net of impairment losses | 38,980 |  |
Residential | Households - other |  |  |
Loans And Advances To Customers [Line Items] |  |  |
Loans to customers, net of impairment losses | 332,931 |  |
Residential | Households - other | Less than or equal to 40% |  |  |
Loans And Advances To Customers [Line Items] |  |  |
Loans to customers, net of impairment losses | 90,170 |  |
Residential | Households - other | More than 40% and less than or equal to 60% |  |  |
Loans And Advances To Customers [Line Items] |  |  |
Loans to customers, net of impairment losses | 116,264 |  |
Residential | Households - other | More than 60% and less than or equal to 80% |  |  |
Loans And Advances To Customers [Line Items] |  |  |
Loans to customers, net of impairment losses | 97,858 |  |
Residential | Households - other | More than 80% and less than or equal to 100% |  |  |
Loans And Advances To Customers [Line Items] |  |  |
Loans to customers, net of impairment losses | 25,944 |  |
Residential | Households - other | More than 100% |  |  |
Loans And Advances To Customers [Line Items] |  |  |
Loans to customers, net of impairment losses | 1,546 |  |
Residential | Without collateral | Households - other |  |  |
Loans And Advances To Customers [Line Items] |  |  |
Loans to customers, net of impairment losses | 1,149 |  |
Residential | Of which property collateral | Households - other |  |  |
Loans And Advances To Customers [Line Items] |  |  |
Loans to customers, net of impairment losses | 331,655 |  |
Residential | Of which other collateral | Households - other |  |  |
Loans And Advances To Customers [Line Items] |  |  |
Loans to customers, net of impairment losses | 127 |  |
Consumer loans | Households - other |  |  |
Loans And Advances To Customers [Line Items] |  |  |
Loans to customers, net of impairment losses | 192,576 |  |
Consumer loans | Households - other | Less than or equal to 40% |  |  |
Loans And Advances To Customers [Line Items] |  |  |
Loans to customers, net of impairment losses | 5,909 |  |
Consumer loans | Households - other | More than 40% and less than or equal to 60% |  |  |
Loans And Advances To Customers [Line Items] |  |  |
Loans to customers, net of impairment losses | 8,063 |  |
Consumer loans | Households - other | More than 60% and less than or equal to 80% |  |  |
Loans And Advances To Customers [Line Items] |  |  |
Loans to customers, net of impairment losses | 13,297 |  |
Consumer loans | Households - other | More than 80% and less than or equal to 100% |  |  |
Loans And Advances To Customers [Line Items] |  |  |
Loans to customers, net of impairment losses | 24,977 |  |
Consumer loans | Households - other | More than 100% |  |  |
Loans And Advances To Customers [Line Items] |  |  |
Loans to customers, net of impairment losses | 35,942 |  |
Consumer loans | Without collateral | Households - other |  |  |
Loans And Advances To Customers [Line Items] |  |  |
Loans to customers, net of impairment losses | 104,388 |  |
Consumer loans | Of which property collateral | Households - other |  |  |
Loans And Advances To Customers [Line Items] |  |  |
Loans to customers, net of impairment losses | 1,667 |  |
Consumer loans | Of which other collateral | Households - other |  |  |
Loans And Advances To Customers [Line Items] |  |  |
Loans to customers, net of impairment losses | 86,521 |  |
Other purposes | Households - other |  |  |
Loans And Advances To Customers [Line Items] |  |  |
Loans to customers, net of impairment losses | 17,116 |  |
Other purposes | Households - other | Less than or equal to 40% |  |  |
Loans And Advances To Customers [Line Items] |  |  |
Loans to customers, net of impairment losses | 4,505 |  |
Other purposes | Households - other | More than 40% and less than or equal to 60% |  |  |
Loans And Advances To Customers [Line Items] |  |  |
Loans to customers, net of impairment losses | 2,590 |  |
Other purposes | Households - other | More than 60% and less than or equal to 80% |  |  |
Loans And Advances To Customers [Line Items] |  |  |
Loans to customers, net of impairment losses | 1,920 |  |
Other purposes | Households - other | More than 80% and less than or equal to 100% |  |  |
Loans And Advances To Customers [Line Items] |  |  |
Loans to customers, net of impairment losses | 4,293 |  |
Other purposes | Households - other | More than 100% |  |  |
Loans And Advances To Customers [Line Items] |  |  |
Loans to customers, net of impairment losses | 442 |  |
Other purposes | Without collateral | Households - other |  |  |
Loans And Advances To Customers [Line Items] |  |  |
Loans to customers, net of impairment losses | 3,366 |  |
Other purposes | Of which property collateral | Households - other |  |  |
Loans And Advances To Customers [Line Items] |  |  |
Loans to customers, net of impairment losses | 5,456 |  |
Other purposes | Of which other collateral | Households - other |  |  |
Loans And Advances To Customers [Line Items] |  |  |
Loans to customers, net of impairment losses | € 8,294 |  |

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- Definition The amount of loans, excluding advances and net of impairment losses, to customers such as public sector, financial institutions, non-financial corporations, and households, as of the balance sheet date. + References No definition available. + Details
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