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Financial liabilities at fair value through profit or loss - Derivative financial liabilities FVTPL (Details) - ARS ($) $ in Thousands | Dec. 31, 2024 | Dec. 31, 2023
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Financial liabilities at fair value through profit or loss [abstract] |  |
Foreign Currency Forwards | $ 3,858,635 | $ 4,671,486
TOTAL | $ 3,858,635 | $ 4,671,486

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- Definition Foreign currency forwards liabilities. + References No definition available. + Details
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Namespace Prefix: | bbar_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition The amount of financial liabilities classified as derivative instruments. [Refer: Financial assets; Derivatives [member]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2024-01-01 -Paragraph 55 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_55&doctype=Standard -URIDate 2024-03-27 + Details
Name: | ifrs-full_DerivativeFinancialLiabilities
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- References No definition available. + Details
Name: | ifrs-full_FinancialLiabilitiesAtFairValueThroughProfitOrLossAbstract
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration