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RISK MANAGEMENT - Scenario of probability weighting in measuring ECL (Details)
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Colombia | Scenario A    
Disclosure of financial assets [line items]    
Scenario probability weighting in measuring ECL (as a percent) 27.00% 28.00%
Colombia | Scenario B    
Disclosure of financial assets [line items]    
Scenario probability weighting in measuring ECL (as a percent) 56.00% 57.00%
Colombia | Scenario C    
Disclosure of financial assets [line items]    
Scenario probability weighting in measuring ECL (as a percent) 17.00% 15.00%
Panama | Scenario A    
Disclosure of financial assets [line items]    
Scenario probability weighting in measuring ECL (as a percent) 10.00% 5.00%
Panama | Scenario B    
Disclosure of financial assets [line items]    
Scenario probability weighting in measuring ECL (as a percent) 50.00% 75.00%
Panama | Scenario C    
Disclosure of financial assets [line items]    
Scenario probability weighting in measuring ECL (as a percent) 40.00% 20.00%