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RISK MANAGEMENT - Loan portfolio given as collateral (Details) - COP ($) $ in Millions | Dec. 31, 2024 | Dec. 31, 2023
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Disclosure of risk management [abstract] |  |
Loan portfolio delivered as collateral | $ 0 | $ 0

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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 Loan portfolio delivered as collateral + References No definition available. + Details
Name: | aval_LoanPortfolioDeliveredAsCollateral
Namespace Prefix: | aval_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant