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FINANCIAL TRUSTS - Mendoza Trust (Details) - Mendoza Financial Trust $ in Thousands	Dec. 31, 2019 ARS ($)
Financial Trust
Liabilities recorded	$ 21,018
Assets in trust	$ 647

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 amount of assets in a financial trust at reporting date.

+ References

No definition available.

+ Details

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

X

- Definition

The amount of liabilities recorded in a financial trust at reporting date.

+ References

No definition available.

+ Details

Name:	supv_FinancialTrustLiabilities
Namespace Prefix:	supv_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Details

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