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RISK MANAGEMENT - Regulatory capital management (Details) | 12 Months Ended
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Dec. 31, 2023
Disclosure of nature and extent of risks arising from financial instruments [line items] |
Capital Conversion Buffer | 1.50%
Systematic Risk Buffer | 1.00%
Decrees established a minimum leverage ratio | 3.00%
Bottom of range [member] |
Disclosure of nature and extent of risks arising from financial instruments [line items] |
Solvency Risk Ratio | 9.00%
Basic Solvency Risk Ratio | 4.50%
Additional Tier 1 Percentage | 6.00%

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- Definition Additional Tier 1 + References No definition available. + Details
Name: | aval_AdditionalTier1Percentage
Namespace Prefix: | aval_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition This represents an enterprise's ability to meet its debt and other obligations. + References No definition available. + Details
Name: | aval_BasicSolvencyRiskRatio
Namespace Prefix: | aval_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Decrees established a minimum leverage ratio + References No definition available. + Details
Name: | aval_DecreesEstablishedMinimumLeverageRatio
Namespace Prefix: | aval_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of capital conversion buffer. + References No definition available. + Details
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Namespace Prefix: | aval_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of systematic risk buffer. + References No definition available. + Details
Name: | aval_PercentageOfSystematicRiskBuffer
Namespace Prefix: | aval_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition This represents an enterprise's ability to meet its debt and other obligations. + References No definition available. + Details
Name: | aval_SolvencyRiskRatio
Namespace Prefix: | aval_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- 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_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsLineItems
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | ifrs-full_RangeAxis=ifrs-full_BottomOfRangeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |