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v3.20.1

LEGAL CLAIMS AND OTHER MATTERS (Details) - ARS ($) $ in Thousands |  | 12 Months Ended | 24 Months Ended |  |
--- | --- | --- | --- | --- | ---
Oct. 09, 2008 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | Jun. 30, 2011 | Mar. 31, 2017 | May 24, 2013
LEGAL CLAIMS AND OTHER MATTERS [Abstract] |  |  |  |  |  |  |  |
Payment for claims to provincial agencies |  |  |  | $ 148,500 | $ 27,600 |  |  |
Provisions for contingency |  | $ 515,100 | $ 482,600 |  |  |  |  |
Validity period of precautionary measure |  | 6 months |  |  |  |  |  |
Extended Validity Period of Precautionary Measure |  | 6 months |  |  |  |  |  |
Increase in tariff percentage | 20.00% |  |  |  |  |  |  |
Receivables from income taxes and value added tax |  |  |  |  |  |  |  | $ 433,300
Account receivables booked, recovery action |  | $ 0 | 0 |  |  |  |  |
Claim amount for the omission as agent of withholding and collection of turnover tax |  |  |  |  |  | $ 4,900 |  |
Canceled partial debt claim amount |  |  |  |  |  |  | $ 2,900 |
Provision for other matters |  | $ 74,000 | $ 91,900 |  |  |  |  |

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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 2019-01-01 -Section Example 10 A court case -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=37&code=ifrs-tx-2019-en-r&doctype=Illustrative%20Examples&dita_xref=IAS37_IE_C_ex10_TI -URIDate 2019-03-27 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 37 -IssueDate 2019-01-01 -Paragraph 87 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=37&code=ifrs-tx-2019-en-r&anchor=para_87&doctype=Standard -URIDate 2019-03-27 + Details
Name: | ifrs-full_LegalProceedingsProvision
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition The amount of account receivables booked per this recovery action. + References No definition available. + Details
Name: | tgs_AccountReceivablesBookedRecoveryAction
Namespace Prefix: | tgs_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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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

X
- 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 The amount of provision for contingency. + References No definition available. + Details
Name: | tgs_ContingencyProvisions
Namespace Prefix: | tgs_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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
Name: | tgs_IncreaseDecreaseInTariffPercentage
Namespace Prefix: | tgs_
Data Type: | num: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 The cash outflow for the payment of claims to provincial agencies. + References No definition available. + Details
Name: | tgs_PaymentForClaimsToProvincialAgencies
Namespace Prefix: | tgs_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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