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RISK MANAGEMENT - Structural foreign exchange risk - General information (Details)	12 Months Ended
	Dec. 31, 2023
Disclosure of risk management [abstract]
Percentage of Average Difference in Foreign Currency Denominated Rights and Foreign Currency Denominated Obligations on Unconsolidated Basis	20.00%
Percentage of Average Difference in Foreign Currency Denominated Rights and Foreign Currency Denominated Obligations on Consolidated Basis	40.00%

X

- Definition

Disclosure of risk management [abstract]

+ References

No definition available.

+ Details

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- Definition

The percentage of average difference in foreign currency denominated rights and foreign currency denominated obligations including both on and off balance sheet positions on consolidated basis.

+ References

No definition available.

+ Details

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Period Type:	duration

X

- Definition

The percentage of average difference in foreign currency denominated rights and foreign currency denominated obligations including both on and off balance sheet positions on unconsolidated basis.

+ References

No definition available.

+ Details

Name:	aval_PercentageOfAverageDifferenceInForeignCurrencyDenominatedRightsAndForeignCurrencyDenominatedObligationsOnUnconsolidatedBasis
Namespace Prefix:	aval_
Data Type:	dtr-types:percentItemType
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Period Type:	duration