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INVESTMENT SECURITIES - Equity instruments through OCI - Tabular disclosure (Details) - COP ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Disclosure of financial assets [line items]
Financial assets	$ 304,853,883	$ 280,746,878
Investments in equity instruments designated at fair value through other comprehensive income [member]
Disclosure of financial assets [line items]
Financial assets	1,421,303	1,117,349
Investment securities at fair value [member]
Disclosure of financial assets [line items]
Financial assets	28,472,926	24,446,014
Equity investments [member] | 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	1,421,303	1,117,349
Equity investments [member] | Investment securities at fair value [member] | Investments in equity instruments designated at fair value through other comprehensive income [member] | Grupo Energia Bogota S.A. E.S.P.
Disclosure of financial assets [line items]
Financial assets	1,159,729	903,068
Equity investments [member] | 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	101,483	43,765
Equity investments [member] | 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	45,396	58,355
Equity investments [member] | Investment securities at fair value [member] | Investments in equity instruments designated at fair value through other comprehensive income [member] | Holding Bursatil Regional S.A.
Disclosure of financial assets [line items]
Financial assets	40,942	45,085
Equity investments [member] | Investment securities at fair value [member] | Investments in equity instruments designated at fair value through other comprehensive income [member] | Titularizadora Colombiana S.A.
Disclosure of financial assets [line items]
Financial assets	31,451	26,453
Equity investments [member] | Investment securities at fair value [member] | Investments in equity instruments designated at fair value through other comprehensive income [member] | Others
Disclosure of financial assets [line items]
Financial assets	$ 42,302	$ 40,623

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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: Classes of financial instruments [domain]; Financial liabilities]

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