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Financial Instruments Risks - Sensitivity of the Financial Margin SFM (Details)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Sensitivity Of The Financial Margin Given A Variation Of 100 Basis Points In Projected Margin [Abstract]
Closing	0.47%	0.97%
Minimum	0.43%	0.72%
Maximum	1.01%	1.22%
Average	0.75%	0.95%

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- Definition

Average SFM given a variation of 100 basis points in relation to the 12 month projected margin.

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No definition available.

+ Details

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- Definition

Closing SFM given a variation of 100 basis points in relation to the 12 month projected margin.

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No definition available.

+ Details

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- Definition

Maximum SFM given a variation of 100 basis points in relation to the 12 month projected margin.

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No definition available.

+ Details

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Data Type:	dtr-types:percentItemType
Balance Type:	na
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- Definition

Minimum SFM given a variation of 100 basis points in relation to the 12 month projected margin.

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No definition available.

+ Details

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Namespace Prefix:	bbar_
Data Type:	dtr-types:percentItemType
Balance Type:	na
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- Definition

Sensitivity of the financial margin given a variation of 100 basis points in projected margin.

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No definition available.

+ Details

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