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Financial assets at fair value through profit or loss - Debt Securities FVTPL (Detail) - ARS ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Debt Securities Held [Abstract] |  |  |
BCRA Liquidity Bills | [1] | $ 14,615,430 | $ 0
Government securities |  | 10,904,532 | 2,719,594
Private securities - Corporate bonds |  | 0 | 1,519
TOTAL |  | $ 25,519,962 | $ 2,721,113
[1] | Due 01-12-2023

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- Definition The amount of debt securities held by the entity. + References No definition available. + Details
Name: | bbar_DebtSecuritiesHeld
Namespace Prefix: | bbar_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Debt securities held + References No definition available. + Details
Name: | bbar_DebtSecuritiesHeldAbstract
Namespace Prefix: | bbar_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount of government securities held by the entity. + References No definition available. + Details
Name: | bbar_GovernmentSecurities
Namespace Prefix: | bbar_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Liquidity bills FVTPL. + References No definition available. + Details
Name: | bbar_LiquidityBillsFvtpl
Namespace Prefix: | bbar_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The amount of private securities corporate bonds held by the entity. + References No definition available. + Details
Name: | bbar_PrivateSecuritiesCorporateBonds
Namespace Prefix: | bbar_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant