No definition available.

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

- Definition

The amount of new bonds issued during the period.

+ References

No definition available.

+ Details

Name:	cib_BondsIssuedDuringPeriod
Namespace Prefix:	cib_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Borrowings, Nominal Coupon Rate

+ References

No definition available.

+ Details

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

- Definition

Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	cib_DebtInstrumentTerm1
Namespace Prefix:	cib_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

The interest rate on borrowings. [Refer: Borrowings]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IFRS
-Number 7
-IssueDate 2024-01-01
-Paragraph 7
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_7&doctype=Standard
-URIDate 2024-03-27

+ Details

Name:	ifrs-full_BorrowingsInterestRate
Namespace Prefix:	ifrs-full_
Data Type:	dtr-2022:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The amount of a hedging instrument, recognised as a liability. [Refer: Hedging instruments [domain]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 7
-IssueDate 2024-01-01
-Paragraph 24A
-Subparagraph a
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_24A_a&doctype=Standard
-URIDate 2024-03-27

+ Details

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

- Definition

The nominal or face amount of a financial instrument, used to calculate payments made on that instrument.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2024-01-01
-Paragraph 112
-Subparagraph c
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_112_c&doctype=Standard
-URIDate 2024-03-27

+ Details

Name:	ifrs-full_NotionalAmount
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	instant

- Details

Name:	ifrs-full_TypesOfHedgesAxis=ifrs-full_CashFlowHedgesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_HedgingInstrumentsAxis=cib_BondMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_TypesOfHedgesAxis=ifrs-full_HedgesOfNetInvestmentInForeignOperationsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_TypesOfFinancialLiabilitiesAxis=cib_SubordinatedBondsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=cib_BancolombiaS.a.Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_TypesOfFinancialLiabilitiesAxis=cib_OrdinaryBondsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=cib_BanistmoSaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_RangeAxis=ifrs-full_BottomOfRangeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_RangeAxis=ifrs-full_TopOfRangeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=cib_BancoAgricolaSaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_TypesOfFinancialLiabilitiesAxis=cib_SeniorBondMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

DEBT INSTRUMENTS IN ISSUE - Bonds issued (Details) - USD ($) $ in Thousands		1 Months Ended	12 Months Ended
	Jun. 24, 2024	Jun. 30, 2024	Dec. 31, 2024	Dec. 31, 2023	Dec. 18, 2024	Nov. 12, 2024	Jul. 02, 2024
DEBT INSTRUMENTS IN ISSUE
New issuances of bonds		$ 800,000
Cash flow hedges \| Bond
DEBT INSTRUMENTS IN ISSUE
Principal balance			$ 1,320,327,000
Net foreign investment
DEBT INSTRUMENTS IN ISSUE
Principal balance				$ 1,982,034
Net foreign investment \| Bond
DEBT INSTRUMENTS IN ISSUE
Principal balance			1,036,695,000
Subordinated bonds \| Bond
DEBT INSTRUMENTS IN ISSUE
Hedging instrument, liability	$ 283,632,000				$ 550,000,000		$ 4,661,000
Subordinated bonds \| Bancolombia S.A.
DEBT INSTRUMENTS IN ISSUE
New issuances of bonds	$ 800,000,000
Debt instrument term	5 years
Nominal coupon rate	8.625%
Ordinary bonds \| Banistmo S.A.
DEBT INSTRUMENTS IN ISSUE
New issuances of bonds			$ 106,868,000	$ 58,062,000
Debt instrument term				1 year
Ordinary bonds \| Banistmo S.A. \| Minimum
DEBT INSTRUMENTS IN ISSUE
Debt instrument term			1 year
Interest rate			5.70%	6.00%
Ordinary bonds \| Banistmo S.A. \| Maximum
DEBT INSTRUMENTS IN ISSUE
Debt instrument term			2 years
Interest rate			6.35%	6.25%
Ordinary bonds \| Banco Agricola S.A.
DEBT INSTRUMENTS IN ISSUE
New issuances of bonds			$ 21,382,000	$ 77,700,000
Ordinary bonds \| Banco Agricola S.A. \| Minimum
DEBT INSTRUMENTS IN ISSUE
Debt instrument term			1 year	1 year 6 months
Interest rate			7.00%	6.68%
Ordinary bonds \| Banco Agricola S.A. \| Maximum
DEBT INSTRUMENTS IN ISSUE
Debt instrument term			1 year 6 months	8 years
Interest rate			7.05%	7.25%
Senior bonds \| Bond
DEBT INSTRUMENTS IN ISSUE
Hedging instrument, liability	$ 267,421,000					$ 212,600,000	$ 2,013,000