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ACCOUNTING STANDARDS AND BASIS OF PREPARATION - Income Tax (Detail)	12 Months Ended
	Dec. 31, 2019 item
ACCOUNTING STANDARDS AND BASIS OF PREPARATION
Minimum effective tax rate on computable assets	1.00%
Number of tax liability	2
Period excess minimum tax can be carry over as payment of income tax	10 years

X

- Definition

Disclosure of significant accounting policies.

+ References

No definition available.

+ Details

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

X

- Definition

The effective income tax rate based on the computable assets.

+ References

No definition available.

+ Details

Name:	supv_MinimumEffectiveTaxRateOnComputableAssets
Namespace Prefix:	supv_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The number of tax liability that applies to the entity. The tax liability is the higher of the two tax rates.

+ References

No definition available.

+ Details

Name:	supv_NumberOfTax
Namespace Prefix:	supv_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The period the excess off minimum tax based on computable assets over income tax can be carried over as payment of income tax, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	supv_NumberYearsCarryoverOfExcessMinimumTaxBasedOnAssetsOverIncomeTax
Namespace Prefix:	supv_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration