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CUSTOMER DEPOSITS - Effective interest rates (Details) | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023
Colombia, Pesos | Bottom of range [member] |  |
Disclosure of customer deposits [line items] |  |
Customer deposits, effective interest rate, interest-bearing checking accounts (as a percent) | 0.17% | 0.11%
Customer deposits, effective interest rate, savings accounts (as a percent) | 0.01% | 0.01%
Customer deposits, effective interest rate, fixed term deposit certificates (as a percent) | 0.05% | 0.05%
Colombia, Pesos | Top of range [member] |  |
Disclosure of customer deposits [line items] |  |
Customer deposits, effective interest rate, interest-bearing checking accounts (as a percent) | 9.35% | 13.40%
Customer deposits, effective interest rate, savings accounts (as a percent) | 13.78% | 16.13%
Customer deposits, effective interest rate, fixed term deposit certificates (as a percent) | 23.52% | 23.52%
Foreign currency | Bottom of range [member] |  |
Disclosure of customer deposits [line items] |  |
Customer deposits, effective interest rate, interest-bearing checking accounts (as a percent) | 0.03% | 0.25%
Customer deposits, effective interest rate, savings accounts (as a percent) | 0.05% | 0.25%
Customer deposits, effective interest rate, fixed term deposit certificates (as a percent) | 0.30% | 0.45%
Foreign currency | Top of range [member] |  |
Disclosure of customer deposits [line items] |  |
Customer deposits, effective interest rate, interest-bearing checking accounts (as a percent) | 5.60% | 5.30%
Customer deposits, effective interest rate, savings accounts (as a percent) | 5.00% | 5.30%
Customer deposits, effective interest rate, fixed term deposit certificates (as a percent) | 9.00% | 8.46%

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