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RISK MANAGEMENT - Credit quality of financial assets (excluding loan portfolio) - Derivative instruments - Additional information (Details) - COP ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022
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Disclosure of risk management [abstract] |  |
Collateralization of cash | $ (1,035,846) | $ (1,224,414)

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- 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

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- 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