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EQUITY ATTRIBUTABLE TO OWNERS OF THE PARENT - Outstanding shares (Details) - $ / shares | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023
Disclosure of classes of share capital [line items] |  |
Nominal value per share | $ 1 |
Common stock conversion to preferred stock | 500,000 | 2,433,481
Preference shares |  |
Disclosure of classes of share capital [line items] |  |
Preferential minimum dividend per semester per share | $ 1 |

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- Definition The number of common stock converted to preferred stock during the reporting period. + References No definition available. + Details
Name: | aval_CommonStockConversionToPreferredStock
Namespace Prefix: | aval_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

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- Definition Preferential minimum dividend per semester per share. + References No definition available. + Details
Name: | aval_PreferentialMinimumDividendPerSemesterPerShare
Namespace Prefix: | aval_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | duration

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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table. + References No definition available. + Details
Name: | ifrs-full_DisclosureOfClassesOfShareCapitalLineItems
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition The nominal value per share. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2024-01-01 -Paragraph 79 -Subparagraph a -Clause iii -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_79_a_iii&doctype=Standard -URIDate 2024-03-27 + Details
Name: | ifrs-full_ParValuePerShare
Namespace Prefix: | ifrs-full_
Data Type: | dtr-2022:perShareItemType
Balance Type: | na
Period Type: | instant

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- Details
Name: | ifrs-full_ClassesOfShareCapitalAxis=ifrs-full_PreferenceSharesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |