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INVESTMENT SECURITIES - Equity instruments through OCI - Tabular disclosure (Details) - COP ($) $ in Millions | Mar. 17, 2023 | Dec. 31, 2023 | Dec. 31, 2022
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Disclosure of financial assets [line items] |  |  |
Financial assets |  | $ 280,746,878 | $ 274,682,875
BAC Holding International Corp | Banco de Bogota S.A. |  |  |
Disclosure of financial assets [line items] |  |  |
Percentage of shares sold | 4.11% |  |
Investments in equity instruments designated at fair value through other comprehensive income [member] |  |  |
Disclosure of financial assets [line items] |  |  |
Financial assets |  | 1,117,349 | 1,476,732
Investment securities at fair value [member] |  |  |
Disclosure of financial assets [line items] |  |  |
Financial assets |  | 24,446,014 | 23,939,915
Equity investments | Investment securities at fair value [member] | Investments in equity instruments designated at fair value through other comprehensive income [member] |  |  |
Disclosure of financial assets [line items] |  |  |
Financial assets |  | 1,117,349 | 1,476,732
Equity investments | Investment securities at fair value [member] | Investments in equity instruments designated at fair value through other comprehensive income [member] | Empresa de Energia de Bogota S.A. E.S.P. |  |  |
Disclosure of financial assets [line items] |  |  |
Financial assets |  | 903,068 | 799,928
Equity investments | Investment securities at fair value [member] | Investments in equity instruments designated at fair value through other comprehensive income [member] | BAC Holding International Corp |  |  |
Disclosure of financial assets [line items] |  |  |
Financial assets |  |  | 519,964
Equity investments | Investment securities at fair value [member] | Investments in equity instruments designated at fair value through other comprehensive income [member] | Mineros S.A. |  |  |
Disclosure of financial assets [line items] |  |  |
Financial assets |  | 43,765 | 44,123
Equity investments | Investment securities at fair value [member] | Investments in equity instruments designated at fair value through other comprehensive income [member] | Port operating companies |  |  |
Disclosure of financial assets [line items] |  |  |
Financial assets |  | 58,355 | 36,010
Equity investments | Investment securities at fair value [member] | Investments in equity instruments designated at fair value through other comprehensive income [member] | Bolsa de Valores de Colombia S.A. |  |  |
Disclosure of financial assets [line items] |  |  |
Financial assets |  |  | 26,920
Equity investments | Investment securities at fair value [member] | Investments in equity instruments designated at fair value through other comprehensive income [member] | Holding Burstil Regional S.A. |  |  |
Disclosure of financial assets [line items] |  |  |
Financial assets |  | 45,085 |
Equity investments | Investment securities at fair value [member] | Investments in equity instruments designated at fair value through other comprehensive income [member] | Others [member] |  |  |
Disclosure of financial assets [line items] |  |  |
Financial assets |  | $ 67,076 | $ 49,787

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- Definition The amount of assets that are: (a) cash; (b) an equity instrument of another entity; (c) a contractual right: (i) to receive cash or another financial asset from another entity; or (ii) to exchange financial assets or financial liabilities with another entity under conditions that are potentially favourable to the entity; or (d) a contract that will, or may be, settled in the entity’s own equity instruments and is: (i) a non-derivative for which the entity is, or may be, obliged to receive a variable number of the entity’s own equity instruments; or (ii) a derivative that will, or may be, settled other than by the exchange of a fixed amount of cash or another financial asset for a fixed number of the entity’s own equity instruments. For this purpose the entity’s own equity instruments do not include puttable financial instruments classified as equity instruments in accordance with paragraphs 16A-16B of IAS 32, instruments that impose on the entity an obligation to deliver to another party a pro rata share of the net assets of the entity only on liquidation and are classified as equity instruments in accordance with paragraphs 16C-16D of IAS 32, or instruments that are contracts for the future receipt or delivery of the entity’s own equity instruments. [Refer: Financial instruments, class [member]; Financial liabilities] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2023-01-01 -Paragraph 25 -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2023-en-r&anchor=para_25&doctype=Standard -URIDate 2023-03-23 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2023-01-01 -Paragraph 35H -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2023-en-r&anchor=para_35H&doctype=Standard -URIDate 2023-03-23 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2023-01-01 -Paragraph 35M -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2023-en-r&anchor=para_35M&doctype=Standard -URIDate 2023-03-23 Reference 4: http://www.xbrl.org/2003/role/exampleRef -Name IFRS -Number 7 -IssueDate 2023-01-01 -Paragraph 35N -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2023-en-r&anchor=para_35N&doctype=Standard -URIDate 2023-03-23 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2023-01-01 -Paragraph 35I -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2023-en-r&anchor=para_35I&doctype=Standard -URIDate 2023-03-23 + Details
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