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CONCESSION ARRANGEMENTS RIGHTS - Financial assets in concession arrangements - Additional information (Details) - COP ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Covioriente [member]
Disclosure of detailed information about service concession arrangements [line items]
Financial assets, in work in progress	$ 523,216	$ 715,573	$ 1,043,138
Covipacifico [member]
Disclosure of detailed information about service concession arrangements [line items]
Financial assets, in work in progress	$ 541,065	$ 130,105	$ 621,988

X

- Definition

Financial assets in work in progress

+ References

No definition available.

+ Details

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Namespace Prefix:	aval_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

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_DisclosureOfServiceConcessionArrangementsLineItems
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	ifrs-full_BusinessCombinationsAxis=aval_CoviorienteMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_BusinessCombinationsAxis=aval_CovipacificoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: