FINANCIAL OBLIGATIONS - Issued bonds by issued date and maturity date - Additional information (Details) - COP ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Disclosure of deposits from financial obligations [abstract]
The amount of issued bonds due over 12 months	$ 25,521,295	$ 26,467,982

The non-current portion of non-current bonds issued. [Refer: Bonds issued]

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2021-01-01
-Paragraph 112
-Subparagraph c
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2021-en-r&anchor=para_112_c&doctype=Standard
-URIDate 2021-03-24

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