RISK MANAGEMENT - Identifiable collateral (Details) - Commercial lending portfolio [member] - COP ($) $ in Millions |
Dec. 31, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Disclosure of financial assets [line items] | ||
| Financial assets, identifiable collateral, carrying amount | $ 33,922,945 | $ 37,408,911 |
| Financial assets, identifiable collateral, fair value | 25,174,203 | 28,410,365 |
| 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 | 31,416,687 | 34,004,844 |
| Financial assets, identifiable collateral, fair value | 23,001,651 | 25,569,949 |
| Lifetime expected credit losses [member] | Financial instruments credit-impaired [member] | ||
| Disclosure of financial assets [line items] | ||
| Financial assets, identifiable collateral, carrying amount | 2,506,258 | 3,404,067 |
| Financial assets, identifiable collateral, fair value | $ 2,172,552 | $ 2,840,416 |