DEPOSITS BY CUSTOMERS - Summary of Deposits (Details) - COP ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
DEPOSITS BY CUSTOMERS
Saving accounts	$ 124,636,994	$ 108,971,334
Time deposits	109,760,722	98,686,516
Checking accounts	38,033,696	34,993,066
Other deposits	6,627,989	5,290,264
Total deposits by customers	$ 279,059,401	247,941,180
Percentage of devaluation of Colombian peso against US Dollar	15.36%
Nequi
DEPOSITS BY CUSTOMERS
Total deposits by customers	$ 4,449,420	$ 2,924,906

The amount of balances in customers' saving accounts held by the entity.

No definition available.

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Namespace Prefix:	cib_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table.

+ References

No definition available.

+ Details

Name:	cib_DisclosureOfDepositsFromCustomersLineItems
Namespace Prefix:	cib_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The percentage of devaluation of Colombian peso to the US Dollar.

+ References

No definition available.

+ Details

Name:	cib_PercentageOfDevaluationOfColombianPesoToUnitedStatesDollar
Namespace Prefix:	cib_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The amount of balances in customers' demand deposits held by the entity.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2024-01-01
-Paragraph 112
-Subparagraph c
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-URIDate 2024-03-27

+ Details

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Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The amount of balances in customers' deposit accounts held by the entity that the entity does not separately disclose in the same statement or note.

+ References

+ Details

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Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The amount of balances in customers' term deposits held by the entity.

+ References

+ Details

Name:	ifrs-full_BalancesOnTermDepositsFromCustomers
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The amount of deposit liabilities from customers held by the entity.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2024-01-01
-Paragraph 55
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_55&doctype=Standard
-URIDate 2024-03-27

+ Details

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Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

Name:	ifrs-full_CategoriesOfRelatedPartiesAxis=cib_NequiMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: