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Capital and Reserves - Additional Information (Details)	12 Months Ended
	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