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FINANCIAL OBLIGATIONS - Borrowings from banks and others - Additional information (Details) - COP ($) $ in Millions | Dec. 31, 2024 | Dec. 31, 2023
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Disclosure of deposits from financial obligations [abstract] |  |
Borrowings from banks and others due over 12 months | $ 9,820,699 | $ 11,586,737
Borrowings from development entities due over 12 months | $ 3,829,301 | $ 4,083,085

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- Definition Borrowings from banks and others, noncurrent + References No definition available. + Details
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Namespace Prefix: | aval_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Borrowings from banks and others, noncurrent, development entities + References No definition available. + Details
Name: | aval_BorrowingsFromBanksAndOthersNoncurrentDevelopmentEntities
Namespace Prefix: | aval_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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