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v3.20.1

Financial Instruments Risks (Details) | 12 Months Ended
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Dec. 31, 2019
Disclosure of nature and extent of risks arising from financial instruments [abstract] |
Confidence level of var | 99.00%
Sensitivity Analysis Measurement Percentage | 100.00%

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- Definition The percent of confidence level of market risk metrics VAR to estimate the maximum loss expected. + References No definition available. + Details
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Namespace Prefix: | bbar_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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

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