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CUSTOMER DEPOSITS - Deposits - Additional information (Details) - COP ($) $ in Millions | Dec. 31, 2024 | Dec. 31, 2023
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Disclosure of customer deposits [abstract] |  |
Deposits received | $ 16,764,038 | $ 19,732,877

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- Definition The amount of deposit liabilities from customers held by the entity due over twelve months. + References No definition available. + Details
Name: | aval_DepositsFromCustomersNoncurrent
Namespace Prefix: | aval_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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