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Fair Values Of Financial Instruments - Additional Information (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2023 ARS ($)
Fair Value Of Financial Instruments [Line Items]
Transfers From Level 1 To Level 2	$ 0

X

- Definition

Fair Value Of Financial Instruments

+ References

No definition available.

+ Details

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

X

- Definition

The amount of transfers out of Level 1 and into Level 2 of the fair value hierarchy of assets held at the end of the reporting period. [Refer: Level 1 of fair value hierarchy [member]; Level 2 of fair value hierarchy [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 13
-IssueDate 2023-01-01
-Paragraph 93
-Subparagraph c
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=13&code=ifrs-tx-2023-en-r&anchor=para_93_c&doctype=Standard
-URIDate 2023-03-23

+ Details

Name:	ifrs-full_TransfersOutOfLevel1IntoLevel2OfFairValueHierarchyAssets
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	duration