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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, 2019 | Dec. 31, 2018
--- | --- | ---
Foreign Currency Forwards |  |
Foreign currency forward sale | $ 620,956 | $ 760,615
Foreign currency forward purchases | 618,497 | 620,651
Foreign currency forward sales | 1,804 | 5,463
Foreign currency forward purchases | 35 |
Interest rate swaps |  |
Fixed rate for floating rate | 1,500,050 | $ 3,261,154
Floating rate for fixed rate | $ 92,463 |

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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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Balance Type: | debit
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- Definition Foreign Currency Forwards Purchases Euro. + References No definition available. + Details
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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_
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Balance Type: | credit
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- Definition Foreign Currency Forwards Sales Euro + References No definition available. + Details
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- Definition Interest Rate Swaps Notional Amount + References No definition available. + Details
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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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- Definition The notional amount of interest rate swap contracts -receives floating delivers fixed - held by the entity. + References No definition available. + Details
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