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INCOME TAX - Uncertainties in open tax positions (Details) - COP ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022
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Disclosure of income tax [abstract] |  |
Tax uncertainty liability | $ 3,535 | $ 4,307

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- References No definition available. + Details
Name: | aval_DisclosureOfIncomeTaxAbstract
Namespace Prefix: | aval_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Tax uncertainty liability + References No definition available. + Details
Name: | aval_TaxUncertaintyLiability
Namespace Prefix: | aval_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant