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LEGAL CLAIMS AND OTHER MATTERS (Details) $ in Thousands |  |  | 12 Months Ended | 24 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
Jun. 04, 2021 Extension | Oct. 09, 2008 | Dec. 31, 2021 ARS ($) | Jun. 30, 2011 ARS ($) | Dec. 31, 2020 ARS ($) | Mar. 31, 2017 ARS ($) | May 24, 2013 ARS ($)
LEGAL CLAIMS AND OTHER MATTERS [Abstract] |  |  |  |  |  |  |
Provision amount on turnover tax |  |  | $ 1,134,900 |  | $ 1,153,600 |  |
Validity period of precautionary measure |  |  | 6 months |  |  |  |
Extended Validity Period of Precautionary Measure |  |  | 6 months |  |  |  |
Remaining term of validity period of precautionary measure |  |  | 2 months 9 days |  |  |  |
Number of extensions obtained | Extension | 12 |  |  |  |  |  |
Increase in tariff percentage |  | 20.00% |  |  |  |  |
Receivables from income taxes and value added tax |  |  |  |  |  |  | $ 102,500
Claim amount for the omission as agent of withholding and collection of turnover tax |  |  |  | $ 4,900 |  |  |
Canceled partial debt claim amount |  |  |  |  |  | $ 2,900 |
Provision amount on turnover tax withholding |  |  | $ 0 |  | 0 |  |
Provision amount on environmental matters |  |  | 47,400 |  | 33,200 |  |
Provision for other matters |  |  | $ 113,700 |  | $ 112,130 |  |

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- Definition The amount of provision for legal proceedings. [Refer: Other provisions] + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 37 -IssueDate 2021-01-01 -Section Example 10 A court case -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=37&code=ifrs-tx-2021-en-r&doctype=Illustrative%20Examples&dita_xref=IAS37_IE_C_ex10__IAS37_IE_C_ex10_TI -URIDate 2021-03-24 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 37 -IssueDate 2021-01-01 -Paragraph 87 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=37&code=ifrs-tx-2021-en-r&anchor=para_87&doctype=Standard -URIDate 2021-03-24 + Details
Name: | ifrs-full_LegalProceedingsProvision
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Refers to the amount of debt canceled by the organization during period. + References No definition available. + Details
Name: | tgs_CanceledDebtClaimAmount
Namespace Prefix: | tgs_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Refers to amount of claim for the omission as agent of withholding and collection of the turnover tax without fine or interest. + References No definition available. + Details
Name: | tgs_ClaimAmountForOmissionAsAgentOfWithholdingAndCollectionOfTurnoverTax
Namespace Prefix: | tgs_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition The amount of sought related to income tax and value added tax credit. + References No definition available. + Details
Name: | tgs_ClaimForIncomeTaxesAndValueAddedTaxCreditAmountSought
Namespace Prefix: | tgs_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Refers to the extended validity period of precautionary measure. + References No definition available. + Details
Name: | tgs_ExtendedValidityPeriodOfPrecautionaryMeasure
Namespace Prefix: | tgs_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition Refers to increase (decrease) in tariff percentage during the period. + References No definition available. + Details
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Namespace Prefix: | tgs_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
Name: | tgs_LegalClaimsAndOtherMattersAbstract
Namespace Prefix: | tgs_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition This element represents number of extensions obtained by the entity. + References No definition available. + Details
Name: | tgs_NumberOfExtensionsObtained
Namespace Prefix: | tgs_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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- Definition The amount of provision for environmental protection. + References No definition available. + Details
Name: | tgs_ProvisionForEnvironmentalMatters
Namespace Prefix: | tgs_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition The amount of provision for turnover tax calculated on the natural gas price consumed by entity. + References No definition available. + Details
Name: | tgs_ProvisionForTurnoverTax
Namespace Prefix: | tgs_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition The amount of provision for turnover tax withholding in the province of Buenos Aires. + References No definition available. + Details
Name: | tgs_ProvisionForTurnoverTaxWithholding
Namespace Prefix: | tgs_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Refers to the validity period of precautionary measure. + References No definition available. + Details
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Namespace Prefix: | tgs_
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Balance Type: | na
Period Type: | duration

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- Definition Refers to the remaining term for the validity period of precautionary measure. represented in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | tgs_ValidityPeriodOfPrecautionaryMeasureRemainingTerm
Namespace Prefix: | tgs_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration