CUSTOMER DEPOSITS - Deposits - Additional information (Details) - COP ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Disclosure of customer deposits [abstract]
Deposits received	$ 26,380,487	$ 28,164,514

The amount of deposit liabilities from customers held by the entity due over twelve months.

No definition available.

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