| Line Item | Dec 31, 2025 | Dec 31, 2024 | Dec 31, 2023 | Dec 31, 2022 | Dec 31, 2021 | Dec 31, 2020 | Dec 31, 2019 | Dec 31, 2018 | Dec 31, 2017 |
|---|---|---|---|---|---|---|---|---|---|
| Profit or loss [abstract] | |||||||||
| Interest and Inflation indexation revenue | |||||||||
| Interest and Inflation indexation expense | |||||||||
| Net interest and Inflation indexation income | |||||||||
| Fee and commission income | |||||||||
| Fee and commission expense | |||||||||
| Net fee and commission income | |||||||||
| Net financial result | |||||||||
| Income from investments in other companies | |||||||||
| Income (expense) from non-current assets and disposal groups held for sale not admissible as discontinued operations | |||||||||
| Other operating income | |||||||||
| TOTAL OPERATING INCOME, BEFORE EXPECTED CREDIT LOSSES | |||||||||
| Expected credit losses | |||||||||
| TOTAL OPERATING INCOME, NET OF EXPECTED CREDIT LOSSES | |||||||||
| Personnel expenses | |||||||||
| Administrative expenses | |||||||||
| Depreciation and amortization | |||||||||
| Impairment of non-financial assets | |||||||||
| Other operating expenses | |||||||||
| TOTAL OPERATING EXPENSES | |||||||||
| NET OPERATING INCOME, BEFORE INCOME TAX | |||||||||
| Income tax | |||||||||
| NET INCOME FOR THE YEAR | |||||||||
| Attributable to: | |||||||||
| Bank’s Shareholders | |||||||||
| Non-controlling interests | — |