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COMPOSITION OF THE MAIN ITEMS OF THE CONSOLIDATED STATEMENT OF FINANCIAL POSITION AND CONSOLIDATED INCOME STATEMENT - Other debt securities (Details) - ARS ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Other debt securities
Other debt instruments held	$ 40,859,975	$ 14,238,340
Government Securities [member]
Other debt securities
Other debt instruments held	12,674,746	14,226,009
Securities issued by the BCRA [member]
Other debt securities
Other debt instruments held	28,181,585
Others [member]
Other debt securities
Other debt instruments held	$ 3,644	$ 12,331

X

- Definition

The amount of debt instruments held by the entity that it does not separately disclose in the same statement or note. [Refer: Debt instruments held]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2020-01-01
-Paragraph 112
-Subparagraph c
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_112_c&doctype=Standard
-URIDate 2020-01-01

+ Details

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Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Disclosure of other debt securities [line items]

+ References

No definition available.

+ Details

Name:	supv_DisclosureOfOtherDebtSecuritiesLineItems
Namespace Prefix:	supv_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	ifrs-full_ClassesOfAssetsAxis=supv_GovernmentSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_ClassesOfAssetsAxis=supv_SecuritiesIssuedByBcraMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_ClassesOfAssetsAxis=supv_OthersMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: