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Financial assets at fair value through profit or loss - Debt Securities FVTPL (Details) - ARS ($) $ in Thousands | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Debt Securities Held [Abstract] |  |  |
Government securities |  | $ 223,932,573 | $ 33,957,345
Private securities - Corporate bonds |  | 2,150,301 | 0
BCRA Liquidity Bills | [1] | 0 | 45,513,297
TOTAL |  | $ 226,082,874 | $ 79,470,642
[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

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- 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