RISK MANAGEMENT - Credit quality of financial assets (excluding loan portfolio) - Other accounts receivable at FVTPL (Details) - COP ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Disclosure of financial assets [line items]
Financial assets	$ 280,746,878	$ 274,682,875
Financial assets at fair value through profit or loss, category [member]
Disclosure of financial assets [line items]
Financial assets	19,332,588	15,370,870
Other accounts receivable at fair value through profit or loss, mandatorily measured at fair value [member] \| Gross carrying amount [member]
Disclosure of financial assets [line items]
Financial assets	3,830,916	3,507,231
Other accounts receivable at fair value through profit or loss, mandatorily measured at fair value [member] \| Financial assets at fair value through profit or loss, mandatorily measured at fair value, category [member] \| Gross carrying amount [member]
Disclosure of financial assets [line items]
Financial assets	3,830,916	3,507,231
Other accounts receivable at fair value through profit or loss, mandatorily measured at fair value [member] \| Financial assets at fair value through profit or loss, mandatorily measured at fair value, category [member] \| Gross carrying amount [member] \| Investment grade [member]
Disclosure of financial assets [line items]
Financial assets	3,830,916	3,507,231
Service concession arrangements [member]
Disclosure of financial assets [line items]
Financial assets	17,812,820	16,153,016
Service concession arrangements [member] \| Gross carrying amount [member]
Disclosure of financial assets [line items]
Financial assets	17,821,214	16,161,187
Service concession arrangements [member] \| Financial assets at fair value through profit or loss, mandatorily measured at fair value, category [member] \| Gross carrying amount [member]
Disclosure of financial assets [line items]
Financial assets	3,830,916	3,507,231
Service concession arrangements [member] \| Financial assets at fair value through profit or loss, mandatorily measured at fair value, category [member] \| Gross carrying amount [member] \| Investment grade [member]
Disclosure of financial assets [line items]
Financial assets	$ 3,830,916	$ 3,507,231

- 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]

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