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RISK MANAGEMENT - Identifiable collateral (Details) - Commercial lending portfolio [member] - COP ($) $ in Millions | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Disclosure of financial assets [line items] |  |
Financial assets, identifiable collateral, carrying amount | $ 37,408,911 | $ 26,436,467
Financial assets, identifiable collateral, fair value | 28,410,365 | 18,425,401
Twelve-month expected credit losses and lifetime expected credit losses [member] | Financial instruments not credit-impaired [member] |  |
Disclosure of financial assets [line items] |  |
Financial assets, identifiable collateral, carrying amount | 34,004,844 | 23,484,250
Financial assets, identifiable collateral, fair value | 25,569,949 | 15,996,375
Lifetime expected credit losses [member] | Financial instruments credit-impaired [member] |  |
Disclosure of financial assets [line items] |  |
Financial assets, identifiable collateral, carrying amount | 3,404,067 | 2,952,217
Financial assets, identifiable collateral, fair value | $ 2,840,416 | $ 2,429,026

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