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INCOME TAX - Reconciliation between total expenses of income tax and tax expense - General information (Details) - item
 12 Months Ended
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%