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Financial assets at fair value through profit or loss - Derivative Financial Assets FVTPL - Foreign Currency Forward and Interest Rate Swap (Detail) - ARS ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021
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Foreign Currency Forwards |  |  |
Foreign currency forward purchases - US$ |  | $ 1,165,119 | $ 1,189,085
Foreign currency forward sales - US$ |  | 1,217,856 | 1,129,832
Foreign currency forward sales - Euros |  | 1,825 | 11,432
Interest rate swaps |  |  |
Fixed rate for floating rate | [1] | $ 1,500,000 | $ 180,000
[1] | Floating rate: BADLAR (Buenos Aires Deposits of Large Amount Rate), is the interest rate for time deposits over 1 (one) million pesos, for 30 to 35 days.

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- Definition Foreign Currency Forwards Notional Amount + 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 The notional amount of foreign currency forward purchases contracts in dollars held by the entity. + References No definition available. + Details
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Namespace Prefix: | bbar_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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- Definition The notional amount of foreign currency forward sales contracts in dollars held by the entity. + References No definition available. + Details
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Namespace Prefix: | bbar_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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- Definition Foreign Currency Forwards Sales Euro + References No definition available. + Details
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Namespace Prefix: | bbar_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Interest Rate Swaps Notional Amount + References No definition available. + Details
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Namespace Prefix: | bbar_
Data Type: | xbrli:stringItemType
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- Definition The notional amount of interest rate swap contracts -receives fixed delivers variable - held by the entity. + References No definition available. + Details
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Namespace Prefix: | bbar_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant