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RISK MANAGEMENT - Liquidity Risk - Percentages in each country (Details) - Colombia
12 Months Ended
Dec. 31, 2023
Checking account and Savings accounts  
Disclosure of financial assets [line items]  
Percentage of deposits to be maintained as reserves 8.00%
Time deposits up to eighteen months  
Disclosure of financial assets [line items]  
Percentage of deposits to be maintained as reserves 3.50%
Time deposits over than eighteen months  
Disclosure of financial assets [line items]  
Percentage of deposits to be maintained as reserves 0.00%