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Financial assets at fair value through profit or loss - Derivative Financial Assets FVTPL (Detail) - ARS ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Derivative Financial Assets [Abstract]
Foreign Currency Forwards	$ 2,357,500	$ 909,793
Put Options - Prisma Medios de Pago S.A	685,000
Interest Rate Swaps	4,536
TOTAL	$ 3,047,036	$ 909,793

X

- Definition

Derivative Financial Assets

+ References

No definition available.

+ Details

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X

- Definition

The amount of foreign currency forward contracts held by the entity.

+ References

No definition available.

+ Details

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Namespace Prefix:	bbar_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

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- Definition

Put options.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

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- Definition

The amount of interest rate swap contracts held by the entity.

+ References

No definition available.

+ Details

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Namespace Prefix:	bbar_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

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- Definition

The amount of financial assets classified as derivative instruments. [Refer: Financial assets; Derivatives [member]]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2019-01-01
-Paragraph 55
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_55&doctype=Standard
-URIDate 2019-03-27

+ Details

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