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INCOME TAX - Reconciliation between total expenses of income tax and tax expense - General information (Details) - item | 12 Months Ended
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Dec. 31, 2027 | Dec. 31, 2026 | Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Disclosure of income tax [line items] |  |  |  |  |  |  |
Applicable tax rate (as a percent) |  |  |  |  | 40.00% | 38.00% | 34.00%
Dividend withholding tax rate |  |  |  |  | 10.00% | 7.50% |
Bottom of range [member] |  |  |  |  |  |  |
Disclosure of income tax [line items] |  |  |  |  |  |  |
Required percentage of increase in net income tax to get audit benefit |  |  |  |  | 25.00% | 25.00% |
Top of range [member] |  |  |  |  |  |  |
Disclosure of income tax [line items] |  |  |  |  |  |  |
Required percentage of increase in net income tax to get audit benefit |  |  |  |  | 35.00% | 35.00% |
Colombia |  |  |  |  |  |  |
Disclosure of income tax [line items] |  |  |  |  |  |  |
Applicable tax rate (as a percent) |  |  |  |  | 35.00% | 35.00% | 31.00%
Tax rate of special free zone |  |  |  |  | 20.00% | 20.00% | 20.00%
Probability percentage of industry and commerce tax paid |  |  |  |  | 100.00% |  |
Colombia | Forecast [Member] |  |  |  |  |  |  |
Disclosure of income tax [line items] |  |  |  |  |  |  |
Applicable tax rate (as a percent) |  |  |  | 35.00% |  |  |
Colombia | Surcharge |  |  |  |  |  |  |
Disclosure of income tax [line items] |  |  |  |  |  |  |
Applicable tax rate (as a percent) |  |  |  |  | 5.00% | 3.00% | 3.00%
Colombia | Surcharge | Forecast [Member] |  |  |  |  |  |  |
Disclosure of income tax [line items] |  |  |  |  |  |  |
Applicable tax rate (as a percent) | 5.00% | 5.00% | 5.00% | 5.00% |  |  |
Tax value unit (UVT) |  |  |  | 120,000 |  |  |
Colombia | Capital gain Tax |  |  |  |  |  |  |
Disclosure of income tax [line items] |  |  |  |  |  |  |
Applicable tax rate (as a percent) |  |  |  |  | 15.00% | 10.00% | 10.00%
Panama |  |  |  |  |  |  |
Disclosure of income tax [line items] |  |  |  |  |  |  |
Applicable tax rate (as a percent) |  |  |  |  | 25.00% | 25.00% | 25.00%
Panama | BAC Holding International Corp |  |  |  |  |  |  |
Disclosure of income tax [line items] |  |  |  |  |  |  |
Applicable tax rate (as a percent) |  |  |  |  | 0.00% | 0.00% | 0.00%
Peru |  |  |  |  |  |  |
Disclosure of income tax [line items] |  |  |  |  |  |  |
Applicable tax rate (as a percent) |  |  |  |  | 29.50% | 29.50% | 29.50%
Barbados |  |  |  |  |  |  |
Disclosure of income tax [line items] |  |  |  |  |  |  |
Applicable tax rate (as a percent) |  |  |  |  | 4.25% | 4.25% |
Guatemala |  |  |  |  |  |  |
Disclosure of income tax [line items] |  |  |  |  |  |  |
Applicable tax rate (as a percent) |  |  |  |  |  |  | 25.00%
El Salvador |  |  |  |  |  |  |
Disclosure of income tax [line items] |  |  |  |  |  |  |
Applicable tax rate (as a percent) |  |  |  |  |  |  | 30.00%
Honduras |  |  |  |  |  |  |
Disclosure of income tax [line items] |  |  |  |  |  |  |
Applicable tax rate (as a percent) |  |  |  |  |  |  | 30.00%
Costa Rica |  |  |  |  |  |  |
Disclosure of income tax [line items] |  |  |  |  |  |  |
Applicable tax rate (as a percent) |  |  |  |  |  |  | 30.00%
Nicaragua |  |  |  |  |  |  |
Disclosure of income tax [line items] |  |  |  |  |  |  |
Applicable tax rate (as a percent) |  |  |  |  |  |  | 30.00%

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