INVESTMENT SECURITIES - Amounts reclassified to profit or loss from OCI before taxes (Details) - COP ($) $ in Millions	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020
Disclosure of investment securities [abstract]
Redemptions or sales	$ 294,112	$ 612,127
ECL allowance	(13,675)	(68,072)
Total reclassified to profit or loss	$ 280,437	$ 544,055

Amount of expected credit loss allowance reclassified from other comprehensive income before tax to profit or loss.

No definition available.

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Namespace Prefix:	aval_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration