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Restricted Assets - Additional Information (Details) - ARS ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Restricted Assets [Line Items]
Other Restricted Assets	$ 20,281,059	$ 27,037,952

X

- Definition

The amount of restricted accounts, deposits, and trusts applied as guarantee for activities related to credit card transactions, with automated clearing houses, transactions settled at maturity, foreign currency futures, court proceedings and leases.

+ References

No definition available.

+ Details

Name:	bbar_OtherRestrictedAssets
Namespace Prefix:	bbar_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Restricted assets.

+ References

No definition available.

+ Details

Name:	bbar_RestrictedAssetsLineItems
Namespace Prefix:	bbar_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration