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v3.25.1

Financial instruments risks - Sensitivity of the Financial Margin SFM (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] |  |
Closing | 0.77% | 0.30%
Minimum | 0.11% | 0.11%
Maximum | 0.77% | 0.35%
Average | 0.44% | 0.24%

X
- Definition Average SFM given a variation of 100 basis points in relation to the 12 month projected margin. + References No definition available. + Details
Name: | bbar_AverageSensitivityOfFinancialMargin
Namespace Prefix: | bbar_
Data Type: | dtr-types1:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition Closing SFM given a variation of 100 basis points in relation to the 12 month projected margin. + References No definition available. + Details
Name: | bbar_ClosingSensitivityOfFinancialMargin
Namespace Prefix: | bbar_
Data Type: | dtr-types1:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Maximum SFM given a variation of 100 basis points in relation to the 12 month projected margin. + References No definition available. + Details
Name: | bbar_MaximumSensitivityOfFinancialMargin
Namespace Prefix: | bbar_
Data Type: | dtr-types1:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Minimum SFM given a variation of 100 basis points in relation to the 12 month projected margin. + References No definition available. + Details
Name: | bbar_MinimumSensitivityOfFinancialMargin
Namespace Prefix: | bbar_
Data Type: | dtr-types1:percentItemType
Balance Type: | na
Period Type: | duration

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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