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RISK MANAGEMENT - Liquidity risk - Undiscounted cash flows of commitment loans (Details) - Liquidity risk [member] - COP ($) $ in Millions | Dec. 31, 2024 | Dec. 31, 2023
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Disclosure of nature and extent of risks arising from financial instruments [line items] |  |
Commitments loans | $ 24,021,180 | $ 24,849,251
Financial guarantee contracts [member] |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |
Commitments loans | 3,103,561 | 2,422,146
Standby letters of credit |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |
Commitments loans | 384,272 | 736,473
Overdraft facility [member] |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |
Commitments loans | 2,261,457 | 2,264,226
Standby credit card facility |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |
Commitments loans | 12,933,382 | 12,449,298
Undrawn approved loans |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |
Commitments loans | 3,320,704 | 4,220,322
Other Commitments |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |
Commitments loans | 2,017,804 | 2,756,786
Not later than one month [member] |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |
Commitments loans | 10,541,565 | 23,290,847
Not later than one month [member] | Financial guarantee contracts [member] |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |
Commitments loans | 48,394 | 1,813,970
Not later than one month [member] | Standby letters of credit |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |
Commitments loans | 26,546 | 606,747
Not later than one month [member] | Overdraft facility [member] |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |
Commitments loans | 1,861,943 | 2,264,226
Not later than one month [member] | Standby credit card facility |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |
Commitments loans | 6,192,403 | 11,917,268
Not later than one month [member] | Undrawn approved loans |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |
Commitments loans | 394,475 | 4,002,210
Not later than one month [member] | Other Commitments |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |
Commitments loans | 2,017,804 | 2,686,426
Later than one month and not later than six months [member] |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |
Commitments loans | 1,002,092 | 570,291
Later than one month and not later than six months [member] | Financial guarantee contracts [member] |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |
Commitments loans | 360,652 | 80,012
Later than one month and not later than six months [member] | Standby letters of credit |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |
Commitments loans | 145,194 | 89,801
Later than one month and not later than six months [member] | Overdraft facility [member] |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |
Commitments loans | 26,281 |
Later than one month and not later than six months [member] | Standby credit card facility |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |
Commitments loans | 355,995 | 112,006
Later than one month and not later than six months [member] | Undrawn approved loans |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |
Commitments loans | 113,970 | 218,112
Later than one month and not later than six months [member] | Other Commitments |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |
Commitments loans |  | 70,360
Later than six months and not later than one year [member] |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |
Commitments loans | 4,564,287 | 115,250
Later than six months and not later than one year [member] | Financial guarantee contracts [member] |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |
Commitments loans | 1,064,744 | 30,320
Later than six months and not later than one year [member] | Standby letters of credit |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |
Commitments loans | 195,627 | 925
Later than six months and not later than one year [member] | Overdraft facility [member] |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |
Commitments loans | 32,113 |
Later than six months and not later than one year [member] | Standby credit card facility |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |
Commitments loans | 660,752 | 84,005
Later than six months and not later than one year [member] | Undrawn approved loans |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |
Commitments loans | 2,611,051 |
Later than one year [member] |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |
Commitments loans | 7,913,236 | 872,863
Later than one year [member] | Financial guarantee contracts [member] |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |
Commitments loans | 1,629,771 | 497,844
Later than one year [member] | Standby letters of credit |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |
Commitments loans | 16,905 | 39,000
Later than one year [member] | Overdraft facility [member] |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |
Commitments loans | 341,120 |
Later than one year [member] | Standby credit card facility |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |
Commitments loans | 5,724,232 | $ 336,019
Later than one year [member] | Undrawn approved loans |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |
Commitments loans | $ 201,208 |

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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table. + References No definition available. + Details
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- Definition The amount of contractual undiscounted cash flows for gross commitments to receive a loan. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IFRS -Number 7 -IssueDate 2024-01-01 -Paragraph B11D -Subparagraph e -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_B11D_e&doctype=Appendix&subtype=B -URIDate 2024-03-27 + Details
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