| 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 income | |||||||||
| Interest expense | |||||||||
| NET INTEREST INCOME | |||||||||
| Fee and commission income | |||||||||
| Fee and commission expense | |||||||||
| Gains (Losses) on financial assets and liabilities at fair value through profit or loss, net | |||||||||
| Gains (Losses) on derecognition of financial assets not measured at fair value through profit or loss, net | |||||||||
| Exchange differences, net | |||||||||
| Other operating income | |||||||||
| Other operating expenses | |||||||||
| GROSS INCOME | |||||||||
| Administrative costs | |||||||||
| Personnel benefits | |||||||||
| Other administrative expenses | |||||||||
| Depreciation and amortization | |||||||||
| Impairment of financial assets | |||||||||
| NET OPERATING INCOME | |||||||||
| Share of profit or loss of entities accounted using the equity method | |||||||||
| PROFIT BEFORE TAX | |||||||||
| Income tax (expense) benefit | |||||||||
| PROFIT FOR THE YEAR | |||||||||
| Attributable to owners of the Bank | |||||||||
| Attributable to non-controlling interest | |||||||||
| EARNINGS PER SHARE | |||||||||
| Basic earnings per share (in ARS per share) | |||||||||
| Diluted earnings per share (in ARS per share) |