RESTRICTED ASSETS (Details) - ARS ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
RESTRICTED ASSETS
Special guarantee accounts in the Argentine Central Bank	$ 2,120,732	$ 2,088,896
Trust guarantee deposits	3,800	5,127
Guarantee deposits for currency forward transactions	2,104,713	434,126
Guarantee deposits for credit cards transactions	317,407	375,993
Other guarantee deposits	158,562	183,608
Guarantee deposits for repo transactions	23,880
Financial assets in guarantee	$ 4,729,094	$ 3,087,750

Loans and other financing restricted assets.

No definition available.

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

The amount of restricted assets in guarantee deposits for currency forward transactions.

No definition available.

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

The amount of restricted assets in other guarantee deposits.

No definition available.

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

Trust guarantee deposits

No definition available.

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

The amount of restricted assets in financial assets.

No definition available.

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

The amount of restricted assets in guarantee deposits for credit cards transactions.

No definition available.

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

The amount of restricted assets in guarantee deposits for repo transactions.

No definition available.

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

The amount of restricted assets special guarantee accounts in Central Bank.

No definition available.

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