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FINANCIAL TRUSTS - Fideicomiso de Administracin Interconexin (Details) - Fideicomiso de Administracin Interconexin Financial Trust	12 Months Ended
	Dec. 31, 2020 USD ($)
Financial Trust
Term of the trust fund	24 months
Period of expiration of liabilities through disbursements	30 days
Amount of fine at the exchange rate in force	$ 6,000

X

- Definition

Represents the amount of fine at the exchange rate in force.

+ References

No definition available.

+ Details

Name:	supv_AmountOfFineAtAtExchangeRateInForce
Namespace Prefix:	supv_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Disclosure of financial trust [line items]

+ References

No definition available.

+ Details

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

X

- Definition

The period of expiration of liabilities through disbursements.

+ References

No definition available.

+ Details

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

X

- Definition

The term of the trust fund.

+ References

No definition available.

+ Details

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

X

- Details

Name:	supv_FinancialTrustAxis=supv_FideicomisoDeAdministracinInterconexinFinancialTrustMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: