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Fair Values Of Financial Instruments - Additional Information (Detail) $ in Thousands | 12 Months Ended
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Dec. 31, 2022 ARS ($)
Fair Value Of Financial Instruments [Line Items] |
Transfers From Level 1 To Level 2 | $ 0

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- 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

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- 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 2022-03-24 -Paragraph 93 -Subparagraph c -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=13&code=ifrs-tx-2022-en-r&anchor=para_93_c&doctype=Standard -URIDate 2022-03-24 + Details
Name: | ifrs-full_TransfersOutOfLevel1IntoLevel2OfFairValueHierarchyAssets
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration