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RISK MANAGEMENT - Modified financial assets - Foreclosed assets (Details) - COP ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Disclosure of risk management [abstract]
Foreclosed assets received	$ 116,299	$ 76,116
Foreclosed assets sold	$ 43,731	$ 90,940

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- Definition

Disclosure of risk management [abstract]

+ References

No definition available.

+ Details

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Namespace Prefix:	aval_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

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- Definition

The amount of foreclosed financial assets received

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No definition available.

+ Details

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

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- Definition

Foreclosed Financial Assets Sold

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No definition available.

+ Details

Name:	aval_ForeclosedFinancialAssetsSold
Namespace Prefix:	aval_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant