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RISK MANAGEMENT - Structural interest rate risk - Financial assets (Details) - COP ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	$ 280,746,878	$ 274,682,875
Interest rate risk [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	271,243,126	265,104,769
Non-interest [member] | Interest rate risk [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	33,479,825	29,273,703
Not later than one month [member] | Interest rate risk [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	26,808,123	36,442,070
Later than one month and not later than six months [member] | Interest rate risk [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	56,771,486	56,506,570
Later than six months and not later than one year [member] | Interest rate risk [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	20,858,928	11,577,930
Later than one year [member] | Interest rate risk [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	133,324,764	131,304,496
Financial assets at fair value through profit or loss, category [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	19,332,588	15,370,870
Financial assets at amortised cost, category [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	236,970,165	235,373,468
Financial assets measured at fair value through other comprehensive income, category [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	23,326,776	22,461,805
Investment securities [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	34,425,693	33,674,477
Loan portfolio [member] | Financial assets at amortised cost, category [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	176,168,055	179,115,847
Loans to corporate entities [member] | Financial assets at amortised cost, category [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	102,145,802	105,248,652
Commercial lending portfolio [member] | Financial assets at amortised cost, category [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	101,753,217	99,282,353
Commercial lending portfolio [member] | Financial assets at amortised cost, category [member] | Interest rate risk [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	107,047,817	104,775,099
Commercial lending portfolio [member] | Financial assets at amortised cost, category [member] | Not later than one month [member] | Interest rate risk [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	12,496,990	14,928,623
Commercial lending portfolio [member] | Financial assets at amortised cost, category [member] | Later than one month and not later than six months [member] | Interest rate risk [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	48,530,829	43,243,207
Commercial lending portfolio [member] | Financial assets at amortised cost, category [member] | Later than six months and not later than one year [member] | Interest rate risk [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	11,530,367	9,111,072
Commercial lending portfolio [member] | Financial assets at amortised cost, category [member] | Later than one year [member] | Interest rate risk [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	34,489,631	37,492,197
Interbank and overnight funds [member] | Financial assets at amortised cost, category [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	392,585	5,966,299
Interbank and overnight funds [member] | Financial assets at amortised cost, category [member] | Interest rate risk [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	392,607	5,967,743
Interbank and overnight funds [member] | Financial assets at amortised cost, category [member] | Not later than one month [member] | Interest rate risk [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	247,668	5,669,519
Interbank and overnight funds [member] | Financial assets at amortised cost, category [member] | Later than one month and not later than six months [member] | Interest rate risk [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	144,939	298,224
Loans to consumers [member] | Financial assets at amortised cost, category [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	55,692,165	56,107,532
Loans to consumers [member] | Financial assets at amortised cost, category [member] | Interest rate risk [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	59,999,611	59,419,444
Loans to consumers [member] | Financial assets at amortised cost, category [member] | Not later than one month [member] | Interest rate risk [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	4,014,604	4,310,303
Loans to consumers [member] | Financial assets at amortised cost, category [member] | Later than one month and not later than six months [member] | Interest rate risk [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	3,485,355	3,698,330
Loans to consumers [member] | Financial assets at amortised cost, category [member] | Later than six months and not later than one year [member] | Interest rate risk [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	1,627,002	1,321,030
Loans to consumers [member] | Financial assets at amortised cost, category [member] | Later than one year [member] | Interest rate risk [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	50,872,650	50,089,781
Mortgage [member] | Financial assets at amortised cost, category [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	18,106,219	17,530,914
Mortgage [member] | Financial assets at amortised cost, category [member] | Interest rate risk [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	18,486,206	17,883,355
Mortgage [member] | Financial assets at amortised cost, category [member] | Not later than one month [member] | Interest rate risk [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	3,369,639	4,124,086
Mortgage [member] | Financial assets at amortised cost, category [member] | Later than one month and not later than six months [member] | Interest rate risk [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	218,540	84,730
Mortgage [member] | Financial assets at amortised cost, category [member] | Later than six months and not later than one year [member] | Interest rate risk [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	6,817	12,666
Mortgage [member] | Financial assets at amortised cost, category [member] | Later than one year [member] | Interest rate risk [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	14,891,210	13,661,873
Microcredit [member] | Financial assets at amortised cost, category [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	223,869	228,749
Microcredit [member] | Financial assets at amortised cost, category [member] | Interest rate risk [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	277,529	267,720
Microcredit [member] | Financial assets at amortised cost, category [member] | Not later than one month [member] | Interest rate risk [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	23,946	19,228
Microcredit [member] | Financial assets at amortised cost, category [member] | Later than one month and not later than six months [member] | Interest rate risk [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	11,431	10,989
Microcredit [member] | Financial assets at amortised cost, category [member] | Later than six months and not later than one year [member] | Interest rate risk [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	33,079	31,573
Microcredit [member] | Financial assets at amortised cost, category [member] | Later than one year [member] | Interest rate risk [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	209,073	205,930
Other accounts receivable at amortized cost [member] | Financial assets at amortised cost, category [member] | Interest rate risk [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	22,171,973	20,255,758
Other accounts receivable at amortized cost [member] | Financial assets at amortised cost, category [member] | Non-interest [member] | Interest rate risk [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	20,447,860	18,307,790
Other accounts receivable at amortized cost [member] | Financial assets at amortised cost, category [member] | Not later than one month [member] | Interest rate risk [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	12,346
Other accounts receivable at amortized cost [member] | Financial assets at amortised cost, category [member] | Later than one month and not later than six months [member] | Interest rate risk [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	4,380	162
Other accounts receivable at amortized cost [member] | Financial assets at amortised cost, category [member] | Later than six months and not later than one year [member] | Interest rate risk [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	3,207
Other accounts receivable at amortized cost [member] | Financial assets at amortised cost, category [member] | Later than one year [member] | Interest rate risk [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	1,704,180	1,947,806
Trading securities [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	15,451,121	11,841,407
Trading securities [member] | Financial assets at fair value through profit or loss, classified as held for trading, category, International Financial Reporting Standards 9 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	15,451,121	11,841,407
Investment securities at fair value [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	24,446,014	23,939,915
Service concession arrangements [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	17,812,820	16,153,016
Service concession arrangements [member] | Financial assets at fair value through profit or loss, mandatorily measured at fair value, category [member] | Interest rate risk [member]
Disclosure of nature and extent of risks arising from financial instruments [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] | Later than one year [member] | Interest rate risk [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	3,830,916	3,507,231
IFRS Cash and Cash Equivalents [Member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	18,597,861	17,032,857
IFRS Cash and Cash Equivalents [Member] | Financial assets at amortised cost, category [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	18,597,861	17,032,857
IFRS Cash and Cash Equivalents [Member] | Financial assets at amortised cost, category [member] | Interest rate risk [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	18,597,861	17,032,857
IFRS Cash and Cash Equivalents [Member] | Financial assets at amortised cost, category [member] | Non-interest [member] | Interest rate risk [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	13,031,965	10,965,913
IFRS Cash and Cash Equivalents [Member] | Financial assets at amortised cost, category [member] | Not later than one month [member] | Interest rate risk [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	5,563,358	6,066,944
IFRS Cash and Cash Equivalents [Member] | Financial assets at amortised cost, category [member] | Later than one month and not later than six months [member] | Interest rate risk [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	854
IFRS Cash and Cash Equivalents [Member] | Financial assets at amortised cost, category [member] | Later than six months and not later than one year [member] | Interest rate risk [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	1,684
Debt securities [member] | Investment securities [member] | Financial assets at fair value through profit or loss, mandatorily measured at fair value, category [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	1,889	1,378
Debt securities [member] | Investment securities [member] | Financial assets at amortised cost, category [member] | Interest rate risk [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	9,996,561	9,771,492
Debt securities [member] | Investment securities [member] | Financial assets at amortised cost, category [member] | Not later than one month [member] | Interest rate risk [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	927,454	967,123
Debt securities [member] | Investment securities [member] | Financial assets at amortised cost, category [member] | Later than one month and not later than six months [member] | Interest rate risk [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	3,402,597	5,543,804
Debt securities [member] | Investment securities [member] | Financial assets at amortised cost, category [member] | Later than six months and not later than one year [member] | Interest rate risk [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	3,389,804	294,035
Debt securities [member] | Investment securities [member] | Financial assets at amortised cost, category [member] | Later than one year [member] | Interest rate risk [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	2,276,706	2,966,530
Debt securities [member] | Investment securities [member] | Financial assets measured at fair value through other comprehensive income, category [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	23,326,776	22,461,805
Debt securities [member] | Trading securities [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	7,113,380	3,760,887
Debt securities [member] | Trading securities [member] | Financial assets at fair value through profit or loss, classified as held for trading, category, International Financial Reporting Standards 9 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	7,113,380	3,760,887
Debt securities [member] | Trading securities [member] | Financial assets at fair value through profit or loss, classified as held for trading, category, International Financial Reporting Standards 9 [member] | Interest rate risk [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	7,113,380	3,760,887
Debt securities [member] | Trading securities [member] | Financial assets at fair value through profit or loss, classified as held for trading, category, International Financial Reporting Standards 9 [member] | Not later than one month [member] | Interest rate risk [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	41,179	75,943
Debt securities [member] | Trading securities [member] | Financial assets at fair value through profit or loss, classified as held for trading, category, International Financial Reporting Standards 9 [member] | Later than one month and not later than six months [member] | Interest rate risk [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	251,925	715,117
Debt securities [member] | Trading securities [member] | Financial assets at fair value through profit or loss, classified as held for trading, category, International Financial Reporting Standards 9 [member] | Later than six months and not later than one year [member] | Interest rate risk [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	539,012	107,442
Debt securities [member] | Trading securities [member] | Financial assets at fair value through profit or loss, classified as held for trading, category, International Financial Reporting Standards 9 [member] | Later than one year [member] | Interest rate risk [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	6,281,264	2,862,385
Debt securities [member] | Investment securities at fair value [member] | Financial assets at fair value through profit or loss, mandatorily measured at fair value, category [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	1,889	1,378
Debt securities [member] | Investment securities at fair value [member] | Financial assets at fair value through profit or loss, mandatorily measured at fair value, category [member] | Interest rate risk [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	1,889	1,378
Debt securities [member] | Investment securities at fair value [member] | Financial assets at fair value through profit or loss, mandatorily measured at fair value, category [member] | Later than six months and not later than one year [member] | Interest rate risk [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	439
Debt securities [member] | Investment securities at fair value [member] | Financial assets at fair value through profit or loss, mandatorily measured at fair value, category [member] | Later than one year [member] | Interest rate risk [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	1,450	1,378
Debt securities [member] | Investment securities at fair value [member] | Financial assets measured at fair value through other comprehensive income, category [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	23,326,776	22,461,805
Debt securities [member] | Investment securities at fair value [member] | Financial assets measured at fair value through other comprehensive income, category [member] | Interest rate risk [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	23,326,776	22,461,805
Debt securities [member] | Investment securities at fair value [member] | Financial assets measured at fair value through other comprehensive income, category [member] | Not later than one month [member] | Interest rate risk [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	110,939	280,301
Debt securities [member] | Investment securities at fair value [member] | Financial assets measured at fair value through other comprehensive income, category [member] | Later than one month and not later than six months [member] | Interest rate risk [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	720,636	2,912,007
Debt securities [member] | Investment securities at fair value [member] | Financial assets measured at fair value through other comprehensive income, category [member] | Later than six months and not later than one year [member] | Interest rate risk [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	3,727,517	700,112
Debt securities [member] | Investment securities at fair value [member] | Financial assets measured at fair value through other comprehensive income, category [member] | Later than one year [member] | Interest rate risk [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	$ 18,767,684	$ 18,569,385

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No definition available.

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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: Financial instruments, class [member]; Financial liabilities]

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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