FINANCIAL ASSETS INVESTMENTS AND DERIVATIVES - Impact of hedging instrument (Details) $ in Millions	12 Months Ended
Dec. 31, 2024 COP ($)
Cash flow hedges \| Foreign currency risk \| Forward exchange contracts
FINANCIAL ASSETS INVESTMENTS AND DERIVATIVES
Nominal amount of hedging instrument	6,614
Hedging instruments, asset	$ 0
Hedging instrument, liability	0
Change in fair value used for measuring ineffectiveness for the period	$ (65)
Cash flow hedges \| Interest rate risk \| Interest rate swaps
FINANCIAL ASSETS INVESTMENTS AND DERIVATIVES
Nominal amount of hedging instrument	188,000
Hedging instruments, asset	$ 0
Hedging instrument, liability	0
Change in fair value used for measuring ineffectiveness for the period	$ 281
Fair value hedges \| Interest rate risk
FINANCIAL ASSETS INVESTMENTS AND DERIVATIVES
Average fixed interest rate	8.22%
Fair value hedges \| Interest rate risk \| Interest rate swaps
FINANCIAL ASSETS INVESTMENTS AND DERIVATIVES
Nominal amount of hedging instrument	134,000
Hedging instruments, asset	$ 0
Hedging instrument, liability	0
Change in fair value used for measuring ineffectiveness for the period	$ (1,044)
Fair value hedges \| Interest rate risk \| Lower Limit
FINANCIAL ASSETS INVESTMENTS AND DERIVATIVES
Hedging instrument, maturity period	1 year
Fair value hedges \| Interest rate risk \| Upper Limit
FINANCIAL ASSETS INVESTMENTS AND DERIVATIVES
Hedging instrument, maturity period	3 years

Hedging Instrument, Maturity Period

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- Definition

The average rate of a hedging instrument. [Refer: Hedging instruments [domain]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 7
-IssueDate 2024-01-01
-Paragraph 23B
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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 gain (loss) on the change in fair value of the hedging instrument used as a basis for recognising hedge ineffectiveness. Hedge ineffectiveness is the extent to which the changes in the fair value or the cash flows of the hedging instrument are greater or less than those on the hedged item.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 7
-IssueDate 2024-01-01
-Paragraph 24A
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-URIDate 2024-03-27

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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 7
-IssueDate 2024-01-01
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- Definition

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

+ References

+ Details

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- Definition

The nominal amount of a hedging instrument. [Refer: Hedging instruments [domain]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 7
-IssueDate 2024-01-01
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