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RISK MANAGEMENT - modified financial assets - Credit commitments (Details) - COP ($) $ in Millions | Dec. 31, 2024 | Dec. 31, 2023
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Loan commitments and financial guarantee contracts [member] |  |
Disclosure of financial assets [line items] |  |
Notional amount | $ 31,399,492 | $ 29,798,544
Loan commitments and financial guarantee contracts [member] | Colombia, Pesos |  |
Disclosure of financial assets [line items] |  |
Notional amount | 27,533,438 | 25,821,105
Loan commitments and financial guarantee contracts [member] | United States of America, Dollars |  |
Disclosure of financial assets [line items] |  |
Notional amount | 3,847,658 | 3,962,607
Loan commitments and financial guarantee contracts [member] | Euro Member Countries, Euro |  |
Disclosure of financial assets [line items] |  |
Notional amount | 14,517 | 13,585
Loan commitments and financial guarantee contracts [member] | Other Currency |  |
Disclosure of financial assets [line items] |  |
Notional amount | 3,879 | 1,247
Guarantees |  |
Disclosure of financial assets [line items] |  |
Notional amount | 3,082,949 | 3,052,607
Unused credit card limits |  |
Disclosure of financial assets [line items] |  |
Notional amount | 12,933,383 | 12,449,298
Approved credits not disbursed |  |
Disclosure of financial assets [line items] |  |
Notional amount | 5,432,167 | 4,818,508
Credit arrangements |  |
Disclosure of financial assets [line items] |  |
Notional amount | 4,583,513 | 4,223,426
Unused limits of overdrafts |  |
Disclosure of financial assets [line items] |  |
Notional amount | 2,261,456 | 2,264,226
Unused letters of credit |  |
Disclosure of financial assets [line items] |  |
Notional amount | 382,953 | 735,472
Other Commitments |  |
Disclosure of financial assets [line items] |  |
Notional amount | $ 2,723,071 | $ 2,255,007

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