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RISK MANAGEMENT - Modified Financial Assets - Foreclosed assets (Details) - COP ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022
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Disclosure of risk management [abstract] |  |
Foreclosed assets received | $ 76,116 | $ 88,482
Foreclosed assets sold | $ 90,940 | $ 50,019

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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

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- Definition The amount of foreclosed financial assets received + References No definition available. + Details
Name: | aval_ForeclosedFinancialAssetsReceived
Namespace Prefix: | aval_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Foreclosed Financial Assets Sold + References No definition available. + Details
Name: | aval_ForeclosedFinancialAssetsSold
Namespace Prefix: | aval_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant