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ANALYSIS OF OPERATING SEGMENTS - General information (Details) - item | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022
Disclosure of operating segments [abstract] |  |
Number of reportable segment | 4 | 8

X
- Definition Number of Reportable Segment. + References No definition available. + Details
Name: | aval_IfrsNumberOfReportableSegment
Namespace Prefix: | aval_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | ifrs-full_DisclosureOfOperatingSegmentsAbstract
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration