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v3.20.1

IFRS standards update - Additional Information (Detail) | Dec. 31, 2019 ARS ($)
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IFRS 16 Lease [Member] |
IFRS standards update [line items] |
Right of use asset and lease liabilities | $ 2,839,825

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- Definition IFRS standards update. + References No definition available. + Details
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Data Type: | xbrli:stringItemType
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Period Type: | duration

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- Definition Right of use asset and lease liabilities. + References No definition available. + Details
Name: | bbar_RightOfUseAssetAndLeaseLiabilities
Namespace Prefix: | bbar_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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