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Financial assets at fair value through profit or loss - Derivative Financial Assets FVTPL (Parenthetical) (Detail) | Oct. 01, 2021
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Prisma Medios de Pago S.A. [Member] |
Derivativefinancialassets [Line Items] |
Percentage of Capital Stock to be Sold | 49.00%

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- Definition Derivative financial assets . + References No definition available. + Details
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Namespace Prefix: | bbar_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Percentage of capital stock to be sold . + References No definition available. + Details
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Namespace Prefix: | bbar_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |