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RISK MANAGEMENT - Credit quality of financial assets (excluding loan portfolio) - Derivative instruments - Additional information (Details) - COP ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Disclosure of risk management [abstract]
Collateralization of cash	$ (246,003)	$ (1,035,846)

X

- Definition

The amount of cash collateral on derivative transactions.

+ References

No definition available.

+ Details

Name:	aval_CashCollateralOnDerivatives
Namespace Prefix:	aval_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Disclosure of risk management [abstract]

+ References

No definition available.

+ Details

Name:	aval_DisclosureOfRiskManagementAbstract
Namespace Prefix:	aval_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration