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RISK MANAGEMENT - Modified Financial Assets - Credit commitments (Details) - COP ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022
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Loan commitments and financial guarantee contracts [member] |  |
Disclosure of financial assets [line items] |  |
Notional amount | $ 29,798,544 | $ 31,008,169
Loan commitments and financial guarantee contracts [member] | Colombia, Pesos |  |
Disclosure of financial assets [line items] |  |
Notional amount | 25,821,105 | 25,497,816
Loan commitments and financial guarantee contracts [member] | United States of America, Dollars |  |
Disclosure of financial assets [line items] |  |
Notional amount | 3,962,607 | 5,480,746
Loan commitments and financial guarantee contracts [member] | Euro Member Countries, Euro |  |
Disclosure of financial assets [line items] |  |
Notional amount | 13,585 | 27,934
Loan commitments and financial guarantee contracts [member] | Other Currency [Member] |  |
Disclosure of financial assets [line items] |  |
Notional amount | 1,247 | 1,673
Guarantees |  |
Disclosure of financial assets [line items] |  |
Notional amount | 3,052,607 | 4,679,653
Unused credit card limits |  |
Disclosure of financial assets [line items] |  |
Notional amount | 12,449,298 | 11,861,422
Approved credits not disbursed |  |
Disclosure of financial assets [line items] |  |
Notional amount | 4,818,508 | 5,037,950
Credit arrangements |  |
Disclosure of financial assets [line items] |  |
Notional amount | 4,223,426 | 4,119,577
Unused limits of overdrafts |  |
Disclosure of financial assets [line items] |  |
Notional amount | 2,264,226 | 2,491,299
Unused letters of credit |  |
Disclosure of financial assets [line items] |  |
Notional amount | 735,472 | 1,203,070
Other Commitments |  |
Disclosure of financial assets [line items] |  |
Notional amount | $ 2,255,007 | $ 1,615,198

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