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Capital and Reserves - Additional Information (Details) | 12 Months Ended
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Dec. 31, 2023
Capital And Reserves [Line Items] |
Percent of legal reserve | 20.00%

X
- Definition Capital And Reserves + References No definition available. + Details
Name: | bbar_CapitalAndReservesLineItems
Namespace Prefix: | bbar_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Legal reserve is a percent of net income determined in accordance with BCRA accounting standards. + References No definition available. + Details
Name: | bbar_PercentOfLegalReserve
Namespace Prefix: | bbar_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration