EMPLOYEE BENEFIT PLANS - Retirement Pension Premium Plan and Executive Pension Plan Premium - Obligation (Details) $ in Millions	12 Months Ended
Dec. 31, 2024 COP ($) item	Dec. 31, 2023 COP ($) item
Retirement Pension Premium Plan and Executive Pension Plan Premium - El Salvador
EMPLOYEE BENEFIT PLANS
Number of participants covered by plan \| item	3,023	2,927
Retirement Pension Premium Plan and Executive Pension Plan Premium - Guatemala
EMPLOYEE BENEFIT PLANS
Number of participants covered by plan \| item	3,627	3,733
Defined benefit obligation at present value \| Retirement Pension Premium Plan and Executive Pension Plan Premium
EMPLOYEE BENEFIT PLANS
Present value of the obligation as of January 1	$ 195,295	$ 176,816
Current service cost	20,632	18,427
Interest cost	18,157	17,338
Benefits paid	(22,004)	(18,889)
Net actuarial loss / (gain) due to changes in assumptions	1,046	(565)
Net actuarial loss / (gain) due to plan experience	(6,103)	24,238
Foreign currency translation effect	15,763	(22,070)
Defined obligation, unfunded as of December 31	$ 222,786	$ 195,295

The number of participants covered by retirement benefit plan.

No definition available.

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- Definition

The decrease (increase) in a net defined benefit liability (asset) resulting from actuarial gains (losses) arising from changes in demographic assumptions that result in remeasurements of the net defined benefit liability (asset). Demographic assumptions deal with matters such as: (a) mortality; (b) rates of employee turnover, disability and early retirement; (c) the proportion of plan members with dependants who will be eligible for benefits; (d) the proportion of plan members who will select each form of payment option available under the plan terms; and (e) claim rates under medical plans. [Refer: Net defined benefit liability (asset)]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
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- Definition

The decrease (increase) in a net defined benefit liability (asset) resulting from actuarial gains (losses) arising from experience adjustments that result in remeasurements of the net defined benefit liability (asset). Experience adjustments deal with the effects of differences between the previous actuarial assumptions and what has actually occurred. [Refer: Net defined benefit liability (asset)]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 19
-IssueDate 2024-01-01
-Paragraph 141
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- Definition

The increase (decrease) in the net defined benefit liability (asset) resulting from employee service in the current period. [Refer: Net defined benefit liability (asset)]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 19
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- Definition

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

+ References

No definition available.

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- Definition

The increase (decrease) in the net defined benefit liability (asset) resulting from changes in foreign exchange rates. [Refer: Net defined benefit liability (asset)]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 19
-IssueDate 2024-01-01
-Paragraph 141
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- Definition

The increase (decrease) in the net defined benefit liability (asset) resulting from the passage of time. [Refer: Interest expense; Net defined benefit liability (asset)]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 19
-IssueDate 2024-01-01
-Paragraph 141
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- Definition

The amount of deficit or surplus in a defined benefit plan, adjusted for any effect of limiting a net defined benefit asset to the asset ceiling. [Refer: Defined benefit plans [domain]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 19
-IssueDate 2024-01-01
-Paragraph 140
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- Definition

The decrease (increase) in the net defined benefit liability (asset) resulting from payments from the plan. [Refer: Net defined benefit liability (asset)]

+ References

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-Name IAS
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