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RISK MANAGEMENT POLICIES - Paragraphs (Details) - factor | 12 Months Ended |
--- | --- | ---
Dec. 31, 2019 | Dec. 31, 2018
Credit risk [member] |  |
Disclosure of Risk Management [line items] |  |
Economic capital calculation holding period | 1 year |
Factoring exposure holding period | 6 months |
Interest rate risk [member] |  |
Disclosure of Risk Management [line items] |  |
Provision utilization holding period | 90 days |
Percentage of interest rate confidence level | 99.00% |
Liquidity risk [member] |  |
Disclosure of Risk Management [line items] |  |
Number of key factors | 2 |
Alert threshold (as a percent) | 10.00% |
Liquidity stress level period | 30 days |
Individuals [member] | Credit risk [member] |  |
Disclosure of Risk Management [line items] |  |
Percentage of credit risk confidence level | 99.90% |
Company [member] | Credit risk [member] |  |
Disclosure of Risk Management [line items] |  |
Percentage of credit risk confidence level | 99.00% |
Securities Issued by BCRA and Government Security Due November 2020 [Member] |  |
Disclosure of Risk Management [line items] |  |
Percentage to total portfolio | 91.30% | 74.10%

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- Definition The threshold alert level of the current account, as a percentage of the average sensitive payments in the time recorded in the immediately previous month. + References No definition available. + Details
Name: | supv_AlertThresholdOfCurrentAccountBalance
Namespace Prefix: | supv_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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- Definition Credit risk capital percentage of confidence level + References No definition available. + Details
Name: | supv_CreditRiskCapitalPercentageOfConfidenceLevel
Namespace Prefix: | supv_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition Line items represent concepts included in a table. These are used to disclose reportable information associated with domain members defined in one or many axes of the table. + References No definition available. + Details
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Balance Type: | na
Period Type: | duration

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- Definition The assume economic holding period in the economic capital calculation related to factoring exposure. + References No definition available. + Details
Name: | supv_EconomicCapitalCalculationFactoringExposureHoldingPeriod
Namespace Prefix: | supv_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition The assume economic holding period in the economic capital calculation. + References No definition available. + Details
Name: | supv_EconomicCapitalCalculationHoldingPeriod
Namespace Prefix: | supv_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition Interest rate capital percentage of confidence level. + References No definition available. + Details
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Namespace Prefix: | supv_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition The period of the stress level of liquidity assessed. + References No definition available. + Details
Name: | supv_LiquidityStressLevelPeriod
Namespace Prefix: | supv_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition The number of key factors of risk factors. + References No definition available. + Details
Name: | supv_NumberOfKeyRiskFactors
Namespace Prefix: | supv_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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- Definition The percentage of securities to total portfolio. + References No definition available. + Details
Name: | supv_PercentageOfSecuritiesToTotalPortfolio
Namespace Prefix: | supv_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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- Definition Provision utilization period + References No definition available. + Details
Name: | supv_ProvisionUtilizationPeriod
Namespace Prefix: | supv_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | ifrs-full_TypesOfRisksAxis=ifrs-full_CreditRiskMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | ifrs-full_TypesOfRisksAxis=ifrs-full_InterestRateRiskMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | ifrs-full_TypesOfRisksAxis=ifrs-full_LiquidityRiskMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | ifrs-full_RiskExposuresAxis=supv_IndividualsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | ifrs-full_RiskExposuresAxis=supv_CompanyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |