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v3.25.1

Financial instruments risks - Sensitivity of the Economic Value SEV (Details) | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023
Disclosure of nature and extent of risks arising from financial instruments [abstract] |  |
Sensitivity analysis measurement percentage | 1.00% |
Closing | 0.94% | 1.09%
Minimum | 0.30% | 0.67%
Maximum | 0.94% | 1.09%
Average | 0.63% | 0.79%

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- Definition Average SEV given a variation of 100 basis points with respect to Core Capital. + References No definition available. + Details
Name: | bbar_AverageSensitivityOfEconomicValue
Namespace Prefix: | bbar_
Data Type: | dtr-types1:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition Closing SEV given a variation of 100 basis points with respect to Core Capital. + References No definition available. + Details
Name: | bbar_ClosingSensitivityOfEconomicValue
Namespace Prefix: | bbar_
Data Type: | dtr-types1:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition Maximum SEV given a variation of 100 basis points with respect to Core Capital. + References No definition available. + Details
Name: | bbar_MaximumSensitivityOfEconomicValue
Namespace Prefix: | bbar_
Data Type: | dtr-types1:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition Minimum SEV given a variation of 100 basis points with respect to Core Capital. + References No definition available. + Details
Name: | bbar_MinimumSensitivityOfEconomicValue
Namespace Prefix: | bbar_
Data Type: | dtr-types1:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition Sensitivity Analysis, Measurement Percentage + References No definition available. + Details
Name: | bbar_SensitivityAnalysisMeasurementPercentage
Namespace Prefix: | bbar_
Data Type: | dtr-types1:percentItemType
Balance Type: | na
Period Type: | instant

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