XML 188 R196.htm IDEA: XBRL DOCUMENT
v3.20.1

Subsequent Events - Additional Information (Details) | Apr. 27, 2020
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Dividend Distribution [Member] |
Subsequent Events [Line Items] |
Percentage Of Capital Requirement Over Exposure To Credit Card Loans | 1250.00%

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- Definition Percentage of capital requirement over exposure to credit card loans + References No definition available. + Details
Name: | bbar_PercentageOfCapitalRequirementOverExposureToCreditCardLoans
Namespace Prefix: | bbar_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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

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- Details
Name: | ifrs-full_NonadjustingEventsAfterReportingPeriodAxis=bbar_DividendDistributionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |