EMPLOYEE BENEFIT PLANS - Defined contribution plans (Details) - COP ($) $ in Millions	12 Months Ended
Dec. 31, 2024	Dec. 31, 2023
Defined contribution plan
EMPLOYEE BENEFIT PLANS
Defined contribution expense	$ 411,717	$ 369,584
Pension
EMPLOYEE BENEFIT PLANS
Defined contribution expense	318,988	286,621
Current severance regimen
EMPLOYEE BENEFIT PLANS
Defined contribution expense	$ 92,729	$ 82,963

The amount of post-employment benefit expense relating to defined contribution plans. Defined contribution plans are post-employment benefit plans under which an entity pays fixed contributions into a separate entity (a fund) and will have no legal or constructive obligation to pay further contributions if the fund does not hold sufficient assets to pay all employee benefits relating to employee service in the current and prior periods.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 19
-IssueDate 2024-01-01
-Paragraph 53
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2024-en-r&anchor=para_53&doctype=Standard
-URIDate 2024-03-27

Name:	ifrs-full_PostemploymentBenefitExpenseDefinedContributionPlans
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration