GAS TRANSPORTER OF THE SOUTH INC (SEC Filing Page | XBRL Cloud Viewer | XBRL Instance)

Line Label Object Class Period Type Balance Report ElementName
1 000100 - Document - Document and Entity Information Network

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 http://tgs.com.ar./role/DocumentAndEntityInformation
2 Entities [Table] Table

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 dei:EntitiesTable
3 Classes of ordinary shares [axis] Axis ifrs-full:ClassesOfOrdinarySharesAxis
4 Ordinary shares [member] Member ifrs-full:OrdinarySharesMember
5 Class "A" Shares [Member] Member tgs:OrdinarySharesClassAMember
6 Class "B" Shares [Member] Member tgs:OrdinarySharesClassBMember
7 Entity Information [Line Items] LineItems dei:EntityInformationLineItems
8 Entity Registrant Name Concept (Text/String) For Period dei:EntityRegistrantName
9 Entity Central Index Key Concept (CIK Number) For Period dei:EntityCentralIndexKey
10 Current Fiscal Year End Date Concept (Month/Day) For Period dei:CurrentFiscalYearEndDate
11 Entity Well-known Seasoned Issuer Concept (Yes/No) For Period dei:EntityWellKnownSeasonedIssuer
12 Entity Voluntary Filers Concept (Yes/No) For Period dei:EntityVoluntaryFilers
13 Entity Current Reporting Status Concept (Yes/No) For Period dei:EntityCurrentReportingStatus
14 Entity Shell Company Concept (Yes/No) For Period dei:EntityShellCompany
15 Entity Filer Category Concept (Filer Category) For Period dei:EntityFilerCategory
16 Entity Emerging Growth Company Concept (Yes/No) For Period dei:EntityEmergingGrowthCompany
17 Entity Ex Transition Period Concept (Yes/No) For Period dei:EntityExTransitionPeriod
18 Entity Public Float Concept (Monetary) As Of Credit dei:EntityPublicFloat
19 Entity Common Stock, Shares Outstanding Concept (Shares) As Of dei:EntityCommonStockSharesOutstanding
20 Document Type Concept (Submission Type) For Period dei:DocumentType
21 Amendment Flag Concept (Yes/No) For Period dei:AmendmentFlag
22 Document Period End Date Concept (Date) For Period dei:DocumentPeriodEndDate
23 Document Fiscal Year Focus Concept (Year) For Period dei:DocumentFiscalYearFocus
24 Document Fiscal Period Focus Concept (Fiscal Period) For Period dei:DocumentFiscalPeriodFocus
25 Entity Small Business Concept (Yes/No) For Period dei:EntitySmallBusiness
26 010000 - Statement - CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME Network

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 http://tgs.com.ar./role/ConsolidatedStatementsOfComprehensiveIncome
27 Implied Table Table

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28 CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME [Abstract] Abstract ifrs-full:IncomeStatementAbstract
29 Revenues Concept (Monetary) For Period Credit ifrs-full:Revenue
30 Cost of sales Concept (Monetary) For Period Debit ifrs-full:CostOfSales
31 Gross profit Concept (Monetary) For Period Credit ifrs-full:GrossProfit
32 Administrative expenses Concept (Monetary) For Period Debit ifrs-full:AdministrativeExpense
33 Selling expenses Concept (Monetary) For Period Debit ifrs-full:SellingExpense
34 Other operating expenses Concept (Monetary) For Period Credit ifrs-full:OtherOperatingIncomeExpense
35 Operating profit Concept (Monetary) For Period Credit ifrs-full:ProfitLossFromOperatingActivities
36 Net financial results Abstract tgs:NetFinancialResultsAbstract
37 Financial income Concept (Monetary) For Period Credit ifrs-full:FinanceIncome
38 Financial expenses Concept (Monetary) For Period Debit ifrs-full:FinanceCosts
39 Gain on net monetary position Concept (Monetary) For Period Credit ifrs-full:GainsLossesOnNetMonetaryPosition
40 Total Concept (Monetary) For Period Credit ifrs-full:FinanceIncomeCost
41 Share of profit from associates Concept (Monetary) For Period Credit ifrs-full:ShareOfProfitLossOfAssociatesAccountedForUsingEquityMethod
42 Net income before income tax Concept (Monetary) For Period Credit ifrs-full:ProfitLossBeforeTax
43 Income tax (expense) / gain Concept (Monetary) For Period Debit ifrs-full:IncomeTaxExpenseContinuingOperations
44 Total comprehensive income for the year Concept (Monetary) For Period Credit ifrs-full:ComprehensiveIncome
45 Total comprehensive income attributable to: Abstract ifrs-full:ComprehensiveIncomeAttributableToAbstract
46 Owners of the Company Concept (Monetary) For Period Credit ifrs-full:ComprehensiveIncomeAttributableToOwnersOfParent
47 Non-controlling interests Concept (Monetary) For Period Credit ifrs-full:ComprehensiveIncomeAttributableToNoncontrollingInterests
48 Weighted average of outstanding ordinary shares (in shares) Concept (Shares) For Period ifrs-full:WeightedAverageShares
49 Basic and diluted earnings per share (in pesos per share) Concept (Share) For Period ifrs-full:BasicAndDilutedEarningsLossPerShare
50 020000 - Statement - CONSOLIDATED STATEMENTS OF FINANCIAL POSITION Network

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 http://tgs.com.ar./role/ConsolidatedStatementsOfFinancialPosition
51 Implied Table Table

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52 CONSOLIDATED STATEMENTS OF FINANCIAL POSITION [Abstract] Abstract ifrs-full:StatementOfFinancialPositionAbstract
53 ASSETS Abstract ifrs-full:AssetsAbstract
54 Non-current assets Abstract ifrs-full:NoncurrentAssetsAbstract
55 Property, plant and equipment Concept (Monetary) As Of Debit ifrs-full:PropertyPlantAndEquipment
56 Investments in associates Concept (Monetary) As Of Debit ifrs-full:InvestmentsInAssociates
57 Other financial assets at amortised cost Concept (Monetary) As Of Debit ifrs-full:NoncurrentFinancialAssetsAtAmortisedCost
58 Deferred income tax asset Concept (Monetary) As Of Debit ifrs-full:DeferredTaxAssets
59 Other receivables Concept (Monetary) As Of Debit ifrs-full:OtherNoncurrentReceivables
60 Trade receivables Concept (Monetary) As Of Debit ifrs-full:NoncurrentTradeReceivables
61 Total non-current assets Concept (Monetary) As Of Debit ifrs-full:NoncurrentAssets
62 Current assets Abstract ifrs-full:CurrentAssetsAbstract
63 Other receivables Concept (Monetary) As Of Debit ifrs-full:OtherCurrentReceivables
64 Inventories Concept (Monetary) As Of Debit ifrs-full:Inventories
65 Trade receivables Concept (Monetary) As Of Debit ifrs-full:CurrentTradeReceivables
66 Contract assets Concept (Monetary) As Of Debit ifrs-full:CurrentContractAssets
67 Derivative financial instruments Concept (Monetary) As Of Debit ifrs-full:CurrentDerivativeFinancialAssets
68 Other financial assets at amortised cost Concept (Monetary) As Of Debit ifrs-full:CurrentFinancialAssetsAtAmortisedCost
69 Other financial assets at fair value through profit or loss Concept (Monetary) As Of Debit ifrs-full:CurrentFinancialAssetsAtFairValueThroughProfitOrLoss
70 Cash and cash equivalents Concept (Monetary) As Of Debit ifrs-full:CashAndCashEquivalents
71 Total current assets Concept (Monetary) As Of Debit ifrs-full:CurrentTaxAssets
72 Total assets Concept (Monetary) As Of Debit ifrs-full:Assets
73 EQUITY Abstract ifrs-full:EquityAbstract
74 Common stock Concept (Monetary) As Of Credit ifrs-full:IssuedCapital
75 Treasury shares Concept (Monetary) As Of Debit ifrs-full:TreasuryShares
76 Cost of acquisition of treasury shares Concept (Monetary) As Of Credit tgs:AdditionalPaidInCapitalCostOfTreasuryShares
77 Legal reserve Concept (Monetary) As Of Credit tgs:LegalReserve
78 Future capital expenditures reserve Concept (Monetary) As Of Credit tgs:FutureCapitalExpendituresReserve
79 Future dividends reserve Concept (Monetary) As Of Credit tgs:FutureDividendsReserve
80 Accumulated retained earnings Concept (Monetary) As Of Credit ifrs-full:RetainedEarnings
81 Non-controlling interests Concept (Monetary) As Of Credit ifrs-full:NoncontrollingInterests
82 Total equity Concept (Monetary) As Of Credit ifrs-full:Equity
83 LIABILITES Abstract ifrs-full:LiabilitiesAbstract
84 Non-current liabilities Abstract ifrs-full:NoncurrentLiabilitiesAbstract
85 Deferred income tax liabilities Concept (Monetary) As Of Credit ifrs-full:DeferredTaxLiabilities
86 Advances from customers Concept (Monetary) As Of Credit ifrs-full:NoncurrentAdvances
87 Contract liabilities Concept (Monetary) As Of Credit ifrs-full:NoncurrentContractLiabilities
88 Loans Concept (Monetary) As Of Credit ifrs-full:LongtermBorrowings
89 Total non-current liabilities Concept (Monetary) As Of Credit ifrs-full:NoncurrentLiabilities
90 Current liabilities Abstract ifrs-full:CurrentLiabilitiesAbstract
91 Provisions Concept (Monetary) As Of Credit ifrs-full:CurrentProvisions
92 Contract liabilities Concept (Monetary) As Of Credit ifrs-full:CurrentContractLiabilities
93 Advances from customers Concept (Monetary) As Of Credit ifrs-full:CurrentAdvances
94 Other payables Concept (Monetary) As Of Credit ifrs-full:OtherCurrentPayables
95 Taxes payables Concept (Monetary) As Of Credit tgs:CurrentTaxesPayables
96 Income tax payable Concept (Monetary) As Of Credit ifrs-full:CurrentTaxLiabilitiesCurrent
97 Payroll and social security taxes payable Concept (Monetary) As Of Credit tgs:PayrollAndSocialSecurityTaxesPayableCurrent
98 Loans Concept (Monetary) As Of Credit ifrs-full:ShorttermBorrowings
99 Trade payables Concept (Monetary) As Of Credit ifrs-full:TradeAndOtherCurrentPayablesToTradeSuppliers
100 Total current liabilities Concept (Monetary) As Of Credit ifrs-full:CurrentLiabilities
101 Total liabilities Concept (Monetary) As Of Credit ifrs-full:Liabilities
102 Total equity and liabilities Concept (Monetary) As Of Credit ifrs-full:EquityAndLiabilities
103 030000 - Statement - CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY Network

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 http://tgs.com.ar./role/ConsolidatedStatementsOfChangesInEquity
104 Statement of changes in equity [table] Table

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 ifrs-full:StatementOfChangesInEquityTable
105 Components of equity [axis] Axis ifrs-full:ComponentsOfEquityAxis
106 Equity [member] Member ifrs-full:EquityMember
107 Total attributable to equity holders [Member] Member ifrs-full:EquityAttributableToOwnersOfParentMember
108 Shareholders Contributions, Total Common Stock [Member] Member ifrs-full:IssuedCapitalMember
109 Shareholders Contributions, Common Stock [Member] Member tgs:IssuedCapitalBeforeInflationAdjustmentToCommonStockMember
110 Shareholders Contributions, Inflation Adjustment to Common Stock [Member] Member tgs:InflationAdjustmentToCommonStockMember
111 Shareholders Contributions, Total Treasury Shares [Member] Member ifrs-full:TreasurySharesMember
112 Shareholders Contributions, Treasury Shares, Common Stock [Member] Member tgs:IssuedCapitalBeforeInflationAdjustmentToCommonStockTreasurySharesMember
113 Shareholders Contributions, Treasury Shares, Inflation Adjustment to Common Stock [Member] Member tgs:InflationAdjustmentToCommonStockTreasurySharesMember
114 Acquisition Cost of Treasury Shares [Member] Member tgs:AcquisitionCostAdjustmentToAdditionalPaidInCapitalTreasurySharesMember
115 Retained Earnings, Accumulated Retained Earnings [Member] Member ifrs-full:RetainedEarningsMember
116 Retained Earnings, Legal Reserve [Member] Member tgs:RetainedEarningsLegalReserveMember
117 Retained Earnings, Future Dividend Reserve [Member] Member tgs:RetainedEarningsFutureDividendReserveMember
118 Retained Earnings, Future Capital Expenditure Reserve [Member] Member tgs:RetainedEarningsFutureCapitalExpenditureReserveMember
119 Retained Earnings, Subtotal [Member] Member tgs:ReservesAndAccumulatedUndistributedEarningsMember
120 Non-Controlling Interests [Member] Member ifrs-full:NoncontrollingInterestsMember
121 Statement of changes in equity [line items] LineItems ifrs-full:StatementOfChangesInEquityLineItems
122 Balance at beginning of period Concept (Monetary) As Of Credit ifrs-full:Equity
123 Resolutions of the Board of Director's Meeting Abstract tgs:ResolutionsOfTheBoardOfDirectorsMeetingAbstract
124 Cash dividends distribution Concept (Monetary) For Period Debit ifrs-full:DividendsPaid
125 Resolutions of the Extraordinary and Ordinary Shareholders' Meeting Abstract tgs:ResolutionsOfTheExtraordinaryAndOrdinaryShareholdersMeetingAbstract
126 Legal reserve Concept (Monetary) For Period Debit tgs:IncreaseDecreaseThroughLegalReserve
127 Future dividends reserve Concept (Monetary) For Period Debit tgs:IncreaseDecreaseThroughFutureDividendsReserve
128 Derecognition of Reserves Concept (Monetary) For Period Credit tgs:IncreaseDecreaseThroughDerecognitionOfReserves
129 Treasury shares purchase Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseThroughTreasuryShareTransactions
130 Cash dividends payment/distribution to non-controlling interest Concept (Monetary) For Period Debit ifrs-full:DividendsRecognisedAsDistributionsToNoncontrollingInterests
131 Comprehensive income for the year Concept (Monetary) For Period Credit ifrs-full:ComprehensiveIncome
132 Balance at end of period Concept (Monetary) As Of Credit ifrs-full:Equity
133 030100 - Statement - CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY (Parenthetical) Network

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 http://tgs.com.ar./role/ConsolidatedStatementsOfChangesInEquityParenthetical
134 Statement of changes in equity [table] Table

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 ifrs-full:StatementOfChangesInEquityTable
135 Components of equity [axis] Axis ifrs-full:ComponentsOfEquityAxis
136 Equity [member] Member ifrs-full:EquityMember
137 Total attributable to equity holders [Member] Member ifrs-full:EquityAttributableToOwnersOfParentMember
138 Treasury Shares [Member] Member ifrs-full:TreasurySharesMember
139 Statement of changes in equity [line items] LineItems ifrs-full:StatementOfChangesInEquityLineItems
140 Equity [Abstract] Abstract ifrs-full:ChangesInEquityAbstract
141 Shares issued (in shares) Concept (Shares) As Of ifrs-full:NumberOfSharesIssued
142 Par value (in pesos per share) Concept (Share) As Of ifrs-full:ParValuePerShare
143 Percentage of share capital Concept (Percent) For Period tgs:SharesAcquiredPercentageOfShareCapital
144 Acquisition cost Concept (Monetary) For Period Debit tgs:TreasurySharesAcquisitionCost
145 040000 - Statement - CONSOLIDATED STATEMENTS OF CASH FLOWS Network

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146 Implied Table Table

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147 CONSOLIDATED STATEMENTS OF CASH FLOWS [Abstract] Abstract ifrs-full:StatementOfCashFlowsAbstract
148 CASH FLOWS PROVIDED BY OPERATING ACTIVITIES Abstract ifrs-full:CashFlowsFromUsedInOperatingActivitiesAbstract
149 Total comprehensive income for the year Concept (Monetary) For Period Credit ifrs-full:ComprehensiveIncome
150 Reconciliation of total comprehensive income to cash flows provided by operating activities: Abstract ifrs-full:AdjustmentsForReconcileProfitLossAbstract
151 Depreciation of property, plant and equipment Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForDepreciationAndAmortisationExpense
152 Derivative financial instrument results Concept (Monetary) For Period Credit tgs:DerivativeFinancialInstrumentResultsIncomeExpense
153 Disposal of property, plant and equipment Concept (Monetary) For Period Credit ifrs-full:AdjustmentsForGainLossOnDisposalsPropertyPlantAndEquipment
154 Share of profit from associates Concept (Monetary) For Period Credit ifrs-full:AdjustmentsForUndistributedProfitsOfAssociates
155 Increase in provisions Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForProvisions
156 Interest expense accrual Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForInterestExpense
157 Interest income on other financial assets other than cash and cash equivalents Concept (Monetary) For Period Credit ifrs-full:AdjustmentsForFinanceIncome
158 Income tax Concept (Monetary) For Period Debit ifrs-full:IncomeTaxExpenseContinuingOperations
159 Doubtful accounts Concept (Monetary) For Period Debit tgs:AdjustmentsForDoubtfulAccounts
160 Foreign exchange loss Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForUnrealisedForeignExchangeLossesGains
161 Gain on net monetary position Concept (Monetary) For Period Credit tgs:AdjustmentForGainsLossesOnNetMonetaryPosition
162 Changes in assets and liabilities: Abstract tgs:ChangesInAssetsAndLiabilitiesAbstract
163 Trade receivables Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForDecreaseIncreaseInTradeAccountReceivable
164 Other receivables Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForDecreaseIncreaseInOtherOperatingReceivables
165 Inventories Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForDecreaseIncreaseInInventories
166 Trade payables Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForIncreaseDecreaseInTradeAccountPayable
167 Contract assets Concept (Monetary) For Period Debit tgs:AdjustmentsForDecreaseIncreaseInContractAssets
168 Payroll and social security taxes payable Concept (Monetary) For Period Debit tgs:AdjustmentsForIncreaseDecreaseInPayrollAndSocialSecurityTaxesPayable
169 Taxes payables Concept (Monetary) For Period Debit tgs:AdjustmentsForIncreaseDecreaseInTaxPayable
170 Other payables Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForIncreaseDecreaseInOtherOperatingPayables
171 Provisions Concept (Monetary) For Period Debit tgs:AdjustmentsForIncreaseDecreaseInProvisions
172 Interest paid Concept (Monetary) For Period Credit ifrs-full:InterestPaidClassifiedAsOperatingActivities
173 Derivative financial instruments Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForDecreaseIncreaseInDerivativeFinancialAssets
174 Income tax paid Concept (Monetary) For Period Credit ifrs-full:IncomeTaxesPaidRefundClassifiedAsOperatingActivities
175 Contract liabilities Concept (Monetary) For Period Debit tgs:AdjustmentsForIncreaseDecreaseInContractLiabilities
176 Advances from customers Concept (Monetary) For Period Debit tgs:AdjustmentsForIncreaseDecreaseInAdvancesFromCustomers
177 Cash flows provided by operating activities Concept (Monetary) For Period ifrs-full:CashFlowsFromUsedInOperatingActivities
178 CASH FLOWS USED IN INVESTING ACTIVITIES Abstract ifrs-full:CashFlowsFromUsedInInvestingActivitiesAbstract
179 Additions to property, plant and equipment Concept (Monetary) For Period Credit ifrs-full:PurchaseOfPropertyPlantAndEquipmentClassifiedAsInvestingActivities
180 Financial assets not considered cash equivalents Concept (Monetary) For Period Debit tgs:FinancialAssetsNotConsideredCashEquivalentsClassifiedAsInvestingActivities
181 Cash flows used in investing activities Concept (Monetary) For Period Debit ifrs-full:CashFlowsFromUsedInInvestingActivities
182 CASH FLOWS PROVIDED BY / (USED IN) FINANCING ACTIVITIES Abstract ifrs-full:CashFlowsFromUsedInFinancingActivitiesAbstract
183 Payment of loans Concept (Monetary) For Period Credit ifrs-full:RepaymentsOfNoncurrentBorrowings
184 Precancellation of loans Concept (Monetary) For Period Credit ifrs-full:RepaymentsOfBorrowingsClassifiedAsFinancingActivities
185 Loans received Concept (Monetary) For Period Debit ifrs-full:ProceedsFromNoncurrentBorrowings
186 Payment of acquisition of treasury shares Concept (Monetary) For Period Credit ifrs-full:PaymentsToAcquireOrRedeemEntitysShares
187 Dividends paid Concept (Monetary) For Period Credit ifrs-full:DividendsPaidToEquityHoldersOfParentClassifiedAsFinancingActivities
188 Cash flows provided by / (used in) financing activities Concept (Monetary) For Period Debit ifrs-full:CashFlowsFromUsedInFinancingActivities
189 NET INCREASE IN CASH AND CASH EQUIVALENTS Concept (Monetary) For Period Debit ifrs-full:IncreaseDecreaseInCashAndCashEquivalents
190 Cash and cash equivalents at the beginning of the year Concept (Monetary) As Of Debit ifrs-full:CashAndCashEquivalents
191 Foreign exchange gain on Cash and cash equivalents Concept (Monetary) For Period Debit ifrs-full:EffectOfExchangeRateChangesOnCashAndCashEquivalents
192 Monetary results effect on Cash and cash equivalents Concept (Monetary) For Period Credit tgs:EffectOfMonetaryResultsOnCashAndCashEquivalents
193 Cash and cash equivalents at the end of the year Concept (Monetary) As Of Debit ifrs-full:CashAndCashEquivalents
194 060100 - Disclosure - BUSINESS DESCRIPTION Network

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195 Implied Table Table

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196 BUSINESS DESCRIPTION [Abstract] Abstract tgs:BusinessDescriptionAbstract
197 BUSINESS DESCRIPTION Concept (Text Block (HTML)) For Period tgs:DescriptionOfBusinessTextBlock
198 060200 - Disclosure - CONSOLIDATED FINANCIAL STATEMENTS Network

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199 Implied Table Table

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200 CONSOLIDATED FINANCIAL STATEMENTS [Abstract] Abstract tgs:ConsolidatedFinancialStatementsAbstract
201 CONSOLIDATED FINANCIAL STATEMENTS Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfGeneralInformationAboutFinancialStatementsExplanatory
202 060300 - Disclosure - BASIS OF PRESENTATION Network

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203 Implied Table Table

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204 BASIS OF PRESENTATION [Abstract] Abstract tgs:BasisOfPresentationAbstract
205 BASIS OF PRESENTATION Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfBasisOfConsolidationExplanatory
206 060400 - Disclosure - SIGNIFICANT ACCOUNTING POLICIES Network

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207 Implied Table Table

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208 SIGNIFICANT ACCOUNTING POLICIES [Abstract] Abstract tgs:SignificantAccountingPoliciesAbstract
209 SIGNIFICANT ACCOUNTING POLICIES Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfSummaryOfSignificantAccountingPoliciesExplanatory
210 060500 - Disclosure - CRITICAL ACCOUNTING ESTIMATES AND JUDGMENTS Network

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211 Implied Table Table

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212 CRITICAL ACCOUNTING ESTIMATES AND JUDGMENTS [Abstract] Abstract tgs:CriticalAccountingEstimatesAndJudgmentsAbstract
213 CRITICAL ACCOUNTING ESTIMATES AND JUDGMENTS Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfAccountingJudgementsAndEstimatesExplanatory
214 060600 - Disclosure - SUPPLEMENTAL CASH FLOW INFORMATION Network

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215 Implied Table Table

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216 SUPPLEMENTAL CASH FLOW INFORMATION [Abstract] Abstract tgs:SUPPLEMENTALCASHFLOWINFORMATIONAbstract
217 SUPPLEMENTAL CASH FLOW INFORMATION Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfCashFlowStatementExplanatory
218 060700 - Disclosure - CONSOLIDATED BUSINESS SEGMENT INFORMATION Network

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219 Implied Table Table

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220 CONSOLIDATED BUSINESS SEGMENT INFORMATION [Abstract] Abstract ifrs-full:DisclosureOfOperatingSegmentsAbstract
221 CONSOLIDATED BUSINESS SEGMENT INFORMATION Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfEntitysReportableSegmentsExplanatory
222 060800 - Disclosure - DETAIL OF SIGNIFICANT STATEMENT OF FINANCIAL POSITION AND STATEMENT OF COMPREHENSIVE INCOME CAPTIONS Network

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223 Implied Table Table

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224 DETAIL OF SIGNIFICANT STATEMENT OF FINANCIAL POSITION AND STATEMENT OF COMPREHENSIVE INCOME CAPTIONS [Abstract] Abstract tgs:DetailOfSignificantStatementOfFinancialPositionAndStatementOfComprehensiveIncomeCaptionsAbstract
225 DETAIL OF SIGNIFICANT STATEMENT OF FINANCIAL POSITION AND STATEMENT OF COMPREHENSIVE INCOME CAPTIONS Concept (Text Block (HTML)) For Period tgs:DisclosureOfAnalysisOfFinancialPositionAndComprehensiveIncomeTextBlock
226 060900 - Disclosure - INVESTMENTS IN ASSOCIATES Network

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227 Implied Table Table

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228 INVESTMENTS IN ASSOCIATES [Abstract] Abstract ifrs-full:DisclosureOfSignificantInvestmentsInAssociatesAbstract
229 INVESTMENTS IN ASSOCIATES Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfInterestsInAssociatesExplanatory
230 061000 - Disclosure - JOINT ARRANGEMENTS Network

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231 Implied Table Table

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232 JOINT ARRANGEMENTS [Abstract] Abstract ifrs-full:DisclosureOfJointOperationsAbstract
233 JOINT ARRANGEMENTS Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfJointVenturesExplanatory
234 061100 - Disclosure - PROFIT FROM ASSOCIATES Network

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235 Implied Table Table

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236 PROFIT FROM ASSOCIATES [Abstract] Abstract tgs:ProfitFromAssociatesAbstract
237 PROFIT FROM ASSOCIATES Concept (Text Block (HTML)) For Period tgs:ProfitFromAssociatesTextBlock
238 061200 - Disclosure - PROPERTY, PLANT AND EQUIPMENT Network

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239 Implied Table Table

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240 PROPERTY, PLANT AND EQUIPMENT [Abstract] Abstract ifrs-full:PropertyPlantAndEquipmentAbstract
241 PROPERTY, PLANT AND EQUIPMENT Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfPropertyPlantAndEquipmentExplanatory
242 061300 - Disclosure - LOANS Network

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243 Implied Table Table

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244 LOANS [Abstract] Abstract ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsAbstract
245 LOANS Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfBorrowingsExplanatory
246 061400 - Disclosure - INCOME TAX AND DEFERRED TAX Network

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247 Implied Table Table

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248 INCOME TAX AND DEFERRED TAX [Abstract] Abstract ifrs-full:MajorComponentsOfTaxExpenseIncomeAbstract
249 INCOME TAX AND DEFERRED TAX Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfIncomeTaxExplanatory
250 061500 - Disclosure - PROVISIONS Network

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251 Implied Table Table

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252 PROVISIONS [Abstract] Abstract ifrs-full:ProvisionsAbstract
253 PROVISIONS Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfProvisionsExplanatory
254 061600 - Disclosure - FINANCIAL RISK MANAGEMENT Network

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255 Implied Table Table

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256 FINANCIAL RISK MANAGEMENT [Abstract] Abstract ifrs-full:DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsAbstract
257 FINANCIAL RISK MANAGEMENT Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfFinancialRiskManagementExplanatory
258 061700 - Disclosure - REGULATORY FRAMEWORK Network

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259 Implied Table Table

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260 REGULATORY FRAMEWORK [Abstract] Abstract ifrs-full:ItemsForPresentationOfRegulatoryDeferralAccountsAbstract
261 REGULATORY FRAMEWORK Concept (Text Block (HTML)) For Period tgs:DisclosureOfRegulatoryFrameworkTextBlock
262 061800 - Disclosure - ASSETS AND LIABILITIES IN FORREIGN CURRENCY Network

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263 Implied Table Table

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264 ASSETS AND LIABILITIES IN FORREIGN CURRENCY [Abstract] Abstract tgs:ASSETSANDLIABILITIESINFORREIGNCURRENCYAbstract
265 ASSETS AND LIABILITIES IN FORREIGN CURRENCY Concept (Text Block (HTML)) For Period tgs:AssetsAndLiabilitiesInForeignCurrencyTextBlock
266 061900 - Disclosure - COMMON STOCK AND DIVIDENDS Network

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267 Implied Table Table

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268 COMMON STOCK AND DIVIDENDS [Abstract] Abstract ifrs-full:DisclosureOfClassesOfShareCapitalAbstract
269 COMMON STOCK AND DIVIDENDS Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfShareCapitalReservesAndOtherEquityInterestExplanatory
270 062000 - Disclosure - LEGAL CLAIMS AND OTHER MATTERS Network

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271 Implied Table Table

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272 LEGAL CLAIMS AND OTHER MATTERS [Abstract] Abstract tgs:LegalClaimsAndOtherMattersAbstract
273 LEGAL CLAIMS AND OTHER MATTERS Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfCommitmentsAndContingentLiabilitiesExplanatory
274 062100 - Disclosure - BALANCES AND TRANSACTIONS WITH RELATED COMPANIES Network

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275 Implied Table Table

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276 BALANCES AND TRANSACTIONS WITH RELATED COMPANIES [Abstract] Abstract ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesAbstract
277 BALANCES AND TRANSACTIONS WITH RELATED COMPANIES Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfRelatedPartyExplanatory
278 062200 - Disclosure - CONTRACTUAL OBLIGATIONS Network

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279 Implied Table Table

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280 CONTRACTUAL OBLIGATIONS [Abstract] Abstract tgs:ContractualObligationsAbstract
281 CONTRACTUAL OBLIGATIONS Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfCommitmentsExplanatory
282 062300 - Disclosure - ASSOCIATES AND JOINT ARRANGEMENTS Network

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283 Implied Table Table

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284 ASSOCIATES AND JOINT ARRANGEMENTS [Abstract] Abstract ifrs-full:InvestmentsInSubsidiariesJointVenturesAndAssociatesAbstract
285 ASSOCIATES AND JOINT ARRANGEMENTS Concept (Text Block (HTML)) For Period tgs:AssociatesAndJointArrangements
286 062400 - Disclosure - SUBSEQUENT EVENTS Network

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287 Implied Table Table

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288 SUBSEQUENT EVENTS [Abstract] Abstract ifrs-full:DisclosureOfNonadjustingEventsAfterReportingPeriodAbstract
289 SUBSEQUENT EVENTS Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfEventsAfterReportingPeriodExplanatory
290 070400 - Disclosure - SIGNIFICANT ACCOUNTING POLICIES (Policies) Network

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291 Implied Table Table

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292 SIGNIFICANT ACCOUNTING POLICIES [Abstract] Abstract tgs:SignificantAccountingPoliciesAbstract
293 New accounting standards Concept (Text Block (HTML)) For Period tgs:DescriptionOfAccountingPolicyForNewAccountingStandardsPolicyTextBlock
294 Consolidation Concept (Text Block (HTML)) For Period tgs:DescriptionOfAccountingPolicyForConsolidationPolicyTextBlock
295 Foreign currency translation Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForForeignCurrencyTranslationExplanatory
296 Restatement to constant currency - Comparative Information Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForFunctionalCurrencyExplanatory
297 Financial instruments Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForFinancialInstrumentsExplanatory
298 Derivative financial instruments Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForDerivativeFinancialInstrumentsExplanatory
299 Inventories Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForMeasuringInventories
300 Trade receivables and other receivables Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForTradeAndOtherReceivablesExplanatory
301 Cash and cash equivalents Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyToDetermineComponentsOfCashAndCashEquivalents
302 Property, plant and equipment ("PPE") Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForPropertyPlantAndEquipmentExplanatory
303 Financial leases Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForLeasesExplanatory
304 Loans Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForBorrowingsExplanatory
305 Trade payables Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForTradeAndOtherPayablesExplanatory
306 Income tax and deferred income tax Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForIncomeTaxExplanatory
307 Provisions Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForProvisionsExplanatory
308 Revenue recognition from contract with customers Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForRecognitionOfRevenue
309 Contract liabilities (until December 31, 2017 Advances from customers) Concept (Text Block (HTML)) For Period tgs:DescriptionOfAccountingPolicyForContractLiabilitiesAdvancesFromCustomersPolicyTextBlock
310 Equity accounts Concept (Text Block (HTML)) For Period tgs:EquityAccountsPolicyTextBlock
311 Basic and diluted earnings per share Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForEarningsPerShareExplanatory
312 080400 - Disclosure - SIGNIFICANT ACCOUNTING POLICIES (Tables) Network

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313 Implied Table Table

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314 SIGNIFICANT ACCOUNTING POLICIES [Abstract] Abstract tgs:SignificantAccountingPoliciesAbstract
315 Impact of New Standards in the Statement of Financial Position Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfExpectedImpactOfInitialApplicationOfNewStandardsOrInterpretations
316 Comparison of Measurement Criteria Used for Financial Assets Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfFinancialAssetsAtDateOfInitialApplicationOfIFRS9Explanatory
317 Subsidiary Control Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfSignificantInvestmentsInSubsidiariesExplanatory
318 Associates Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfSignificantInvestmentsInAssociatesExplanatory
319 Effect of New Standards Adopted Concept (Text Block (HTML)) For Period tgs:DisclosureOfImpactOfInitialApplicationOfNewStandardsRelatedToFinancialReportingInHyperinflationaryEconomiesTableTextBlock
320 Earnings Per Share Concept (Text Block (HTML)) For Period ifrs-full:EarningsPerShareExplanatory
321 080600 - Disclosure - SUPPLEMENTAL CASH FLOW INFORMATION (Tables) Network

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 http://tgs.com.ar./role/SupplementalCashFlowInformationTables
322 Implied Table Table

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323 SUPPLEMENTAL CASH FLOW INFORMATION [Abstract] Abstract tgs:SUPPLEMENTALCASHFLOWINFORMATIONAbstract
324 Supplemental Cash Flow Information Concept (Text Block (HTML)) For Period tgs:SupplementalCashFlowInformationTableTextBlock
325 080700 - Disclosure - CONSOLIDATED BUSINESS SEGMENT INFORMATION (Tables) Network

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 http://tgs.com.ar./role/ConsolidatedBusinessSegmentInformationTables
326 Implied Table Table

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327 CONSOLIDATED BUSINESS SEGMENT INFORMATION [Abstract] Abstract ifrs-full:DisclosureOfOperatingSegmentsAbstract
328 Business Segments Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfOperatingSegmentsExplanatory
329 080800 - Disclosure - DETAIL OF SIGNIFICANT STATEMENT OF FINANCIAL POSITION AND STATEMENT OF COMPREHENSIVE INCOME CAPTIONS (Tables) Network

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330 Implied Table Table

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331 DETAIL OF SIGNIFICANT STATEMENT OF FINANCIAL POSITION AND STATEMENT OF COMPREHENSIVE INCOME CAPTIONS [Abstract] Abstract tgs:DetailOfSignificantStatementOfFinancialPositionAndStatementOfComprehensiveIncomeCaptionsAbstract
332 Other Receivables Concept (Text Block (HTML)) For Period tgs:DisclosureOfOtherReceivablesTableTextBlock
333 Trade Receivables Concept (Text Block (HTML)) For Period tgs:DisclosureOfTradeReceivablesTableTextBlock
334 Cash and Cash Equivalents Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfCashAndCashEquivalentsExplanatory
335 Contract Liabilities Concept (Text Block (HTML)) For Period tgs:ContractLiabilitiesTableTextBlock
336 Advances from Customers Concept (Text Block (HTML)) For Period tgs:DisclosureOfAdvancesFromCustomersTableTextBlock
337 Other Payables Concept (Text Block (HTML)) For Period tgs:DisclosureOfOtherPayablesTableTextBlock
338 Taxes Payables Concept (Text Block (HTML)) For Period tgs:DisclosureOfTaxPayablesTableTextBlock
339 Trade Payables Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfTradeAndOtherPayablesExplanatory
340 Revenues Concept (Text Block (HTML)) For Period tgs:DisclosureOfNetRevenuesTableTextBlock
341 Disaggregation of Revenues Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersExplanatory
342 Cost of Sales Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfCostOfSalesExplanatory
343 Expenses by Nature Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfExpensesByNatureExplanatory
344 Net Financial Results Concept (Text Block (HTML)) For Period tgs:DisclosureOfNetFinancialResultsTableTextBlock
345 Other Operating Expenses Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfOtherOperatingExpenseExplanatory
346 Other Financial Assets at Fair Value through Profit or Loss Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfFinancialInstrumentsAtFairValueThroughProfitOrLossExplanatory
347 Other Financial Assets at Amortized Cost Concept (Text Block (HTML)) For Period tgs:OtherFinancialAssetsAtAmortizedCostTableTextBlock
348 Payroll and Social Security Taxes Payable Concept (Text Block (HTML)) For Period tgs:DisclosureOfPayrollAndSocialSecurityTaxesPayableTableTextBlock
349 080900 - Disclosure - INVESTMENTS IN ASSOCIATES (Tables) Network

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 http://tgs.com.ar./role/InvestmentsInAssociatesTables
350 Implied Table Table

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351 INVESTMENTS IN ASSOCIATES [Abstract] Abstract ifrs-full:DisclosureOfSignificantInvestmentsInAssociatesAbstract
352 Investments in Associates Concept (Text Block (HTML)) For Period tgs:DisclosureOfAssociatesTableTextBlock
353 081000 - Disclosure - JOINT ARRANGEMENTS (Tables) Network

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 http://tgs.com.ar./role/JointArrangementsTables
354 Implied Table Table

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355 JOINT ARRANGEMENTS [Abstract] Abstract ifrs-full:DisclosureOfJointOperationsAbstract
356 Joint Arrangements Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfInterestsInJointArrangementsExplanatory
357 081100 - Disclosure - PROFIT FROM ASSOCIATES (Tables) Network

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 http://tgs.com.ar./role/ProfitFromAssociatesTables
358 Implied Table Table

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359 PROFIT FROM ASSOCIATES [Abstract] Abstract tgs:ProfitFromAssociatesAbstract
360 Profit from Associates Concept (Text Block (HTML)) For Period tgs:DisclosureOfProfitFromAssociatesTableTextBlock
361 081200 - Disclosure - PROPERTY, PLANT AND EQUIPMENT (Tables) Network

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 http://tgs.com.ar./role/PropertyPlantAndEquipmentTables
362 Implied Table Table

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363 PROPERTY, PLANT AND EQUIPMENT [Abstract] Abstract ifrs-full:PropertyPlantAndEquipmentAbstract
364 Property, Plant and Equipment Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfDetailedInformationAboutPropertyPlantAndEquipmentExplanatory
365 Disclosure of Financial Lease under Terms of Leasing Contracts Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfLeasesExplanatory
366 081300 - Disclosure - LOANS (Tables) Network

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 http://tgs.com.ar./role/LoansTables
367 Implied Table Table

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368 LOANS [Abstract] Abstract ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsAbstract
369 Short-term and Long-term Loans Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsExplanatory
370 Activity of Loans Concept (Text Block (HTML)) For Period tgs:DisclosureOfDetailedInformationAboutActivityOfBorrowingsTableTextBlock
371 Maturities of Current and Non-Current Loans Concept (Text Block (HTML)) For Period tgs:DisclosureOfDetailedInformationAboutMaturitiesOfBorrowingsWithoutIncludingIssuanceCostTableTextBlock
372 Maturities of Finance Leases Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfMaturityAnalysisOfFinanceLeasePaymentsReceivableExplanatory
373 Future Minimum Lease Payments and Present Book Value Concept (Text Block (HTML)) For Period tgs:DisclosureOfDetailedInformationAboutReconciliationBetweenFutureMinimumLeasePaymentsAndPresentBookValueTableTextBlock
374 Conditions of 2014 Notes Concept (Text Block (HTML)) For Period tgs:DisclosureOfDetailedInformationAboutConditionsOf2014NotesTableTextBlock
375 Conditions of 2018 Notes Concept (Text Block (HTML)) For Period tgs:DisclosureOfDetailedInformationAboutConditionsOf2018NotesTableTextBlock
376 081400 - Disclosure - INCOME TAX AND DEFERRED TAX (Tables) Network

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 http://tgs.com.ar./role/IncomeTaxAndDeferredTaxTables
377 Implied Table Table

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378 INCOME TAX AND DEFERRED TAX [Abstract] Abstract ifrs-full:MajorComponentsOfTaxExpenseIncomeAbstract
379 Income Tax Expense Concept (Text Block (HTML)) For Period tgs:DisclosureOfReconciliationOfIncomeTaxProvisionExplanatoryTextBlock
380 Net Deferred Tax Assets and Liabilities Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfDeferredTaxesExplanatory
381 Components of Net Deferred Tax Assets and Liabilities Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsExplanatory
382 Effective Income Tax Rate Reconciliation Concept (Text Block (HTML)) For Period tgs:DisclosureOfDetailedInformationAboutEffectiveIncomeTaxRateReconciliationExplanatoryTableTextBlock
383 081500 - Disclosure - PROVISIONS (Tables) Network

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 http://tgs.com.ar./role/ProvisionsTables
384 Implied Table Table

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385 PROVISIONS [Abstract] Abstract ifrs-full:ProvisionsAbstract
386 Provisions Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfOtherProvisionsExplanatory
387 081600 - Disclosure - FINANCIAL RISK MANAGEMENT (Tables) Network

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 http://tgs.com.ar./role/FinancialRiskManagementTables
388 Implied Table Table

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389 FINANCIAL RISK MANAGEMENT [Abstract] Abstract ifrs-full:DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsAbstract
390 Net Assets/Liabilities Position and Effect on Financial Results Concept (Text Block (HTML)) For Period tgs:DisclosureOfNetLiabilityPositionAndChangeInFinancialResultsTableTextBlock
391 Fixed-Rate and Floating-Rate Financial Assets and Liabilities Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfFinancialInstrumentsByTypeOfInterestRateExplanatory
392 Monthly Short Tons Concept (Text Block (HTML)) For Period tgs:DisclosureOfMonthlyShortTonsTableTextBlock
393 Current and Non-Current Trade Receivables Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfTradeAndOtherReceivablesExplanatory
394 Significant Customers Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfSegmentsMajorCustomersExplanatory
395 Maturities of Financial Assets Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfFinancialAssetsExplanatory
396 Maturities of Financial Liabilities Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfFinancialLiabilitiesExplanatory
397 Gearing Ratio Concept (Text Block (HTML)) For Period tgs:DisclosureOfGearingRatioTableTextBlock
398 Categories of Financial Assets and Liabilities Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfDetailedInformationAboutFinancialInstrumentsExplanatory
399 Fair Value of Financial Assets and Liabilities Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfFairValueMeasurementExplanatory
400 081800 - Disclosure - ASSETS AND LIABILITIES IN FORREIGN CURRENCY (Tables) Network

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 http://tgs.com.ar./role/AssetsAndLiabilitiesInForreignCurrencyTables
401 Implied Table Table

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402 ASSETS AND LIABILITIES IN FORREIGN CURRENCY [Abstract] Abstract tgs:ASSETSANDLIABILITIESINFORREIGNCURRENCYAbstract
403 Balances of Assets and Liabilities in Foreign Currency Concept (Text Block (HTML)) For Period tgs:BalancesOfAssetsAndLiabilitiesInForeignCurrencyTableTextBlock
404 081900 - Disclosure - COMMON STOCK AND DIVIDENDS (Tables) Network

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 http://tgs.com.ar./role/CommonStockAndDividendsTables
405 Implied Table Table

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406 COMMON STOCK AND DIVIDENDS [Abstract] Abstract ifrs-full:DisclosureOfClassesOfShareCapitalAbstract
407 Common Stock Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfClassesOfShareCapitalExplanatory
408 Dividends Distribution Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfDividendsExplanatory
409 082100 - Disclosure - BALANCES AND TRANSACTIONS WITH RELATED COMPANIES (Tables) Network

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 http://tgs.com.ar./role/BalancesAndTransactionsWithRelatedCompaniesTables
410 Implied Table Table

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411 BALANCES AND TRANSACTIONS WITH RELATED COMPANIES [Abstract] Abstract ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesAbstract
412 Balances with Related Parties Concept (Text Block (HTML)) For Period tgs:DisclosureOfBalanceBetweenRelatedPartiesTableTextBlock
413 Transactions with Related Parties Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesExplanatory
414 082200 - Disclosure - CONTRACTUAL OBLIGATIONS (Tables) Network

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 http://tgs.com.ar./role/ContractualObligationsTables
415 Implied Table Table

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416 CONTRACTUAL OBLIGATIONS [Abstract] Abstract tgs:ContractualObligationsAbstract
417 Contractual Commitments Concept (Text Block (HTML)) For Period tgs:DisclosureOfDetailedInformationAboutContractualObligationsTableTextBlock
418 090100 - Disclosure - BUSINESS DESCRIPTION (Details) Network

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 http://tgs.com.ar./role/BusinessDescriptionDetails
419 Disclosure of detailed information about business combination [table] Table

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 ifrs-full:DisclosureOfBusinessCombinationsTable
420 Business combinations [axis] Axis ifrs-full:BusinessCombinationsAxis
421 Entity's total for business combinations [member] Member ifrs-full:EntitysTotalForBusinessCombinationsMember
422 Pampa Energia [Member] Member tgs:PampaEnergiaSAMember
423 Trust [Member] Member tgs:CompaniaDeInversionesDeEnergiaSATrustMember
424 GIP, WST and PCT [Member] Member tgs:GrupoInversorPetroquimicaSLWertheinGroupAndPCTLLCMember
425 GIP [Member] Member tgs:GrupoInversorPetroquimicaSLMember
426 WST [Member] Member tgs:WertheinGroupSAMember
427 PCT [Member] Member tgs:PCTLLCMember
428 Ownership [Axis] Axis srt:OwnershipAxis
429 Ownership [Domain] Member srt:OwnershipDomain
430 CIESA [Member] Member tgs:CompaiaaDeInversionesDeEnergiaSAMember
431 Petrobras Participaciones S.L. [Member] Member tgs:PetrobrasParticipacionesSLMember
432 Disclosure of detailed information about business combination [line items] LineItems ifrs-full:DisclosureOfBusinessCombinationsLineItems
433 Major Shareholders [Abstract] Abstract tgs:MajorShareholdersAbstract
434 Percentage of ownership Concept (Percent) As Of tgs:ProportionOfOwnershipInterest
435 090100 - Disclosure - BUSINESS DESCRIPTION (Details) Network

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 http://tgs.com.ar./role/BusinessDescriptionDetails
436 Implied Table Table

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437 BUSINESS DESCRIPTION [Abstract] Abstract tgs:BusinessDescriptionAbstract
438 Business Overview [Abstract] Abstract tgs:BusinessOverviewAbstract
439 Term of transportation license granted Concept (xbrli:durationItemType) For Period tgs:TermOfTransportationLicenseGranted
440 Number of extension entitled Concept (Integer) For Period tgs:NumberOfExtensionOnLicenseGranted
441 Term of the extension Concept (xbrli:durationItemType) For Period tgs:TermOfExtensionOnLicenseGranted
442 090400 - Disclosure - SIGNIFICANT ACCOUNTING POLICIES, IFRS 15 Revenue from Contracts with Customers (Details) Network

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 http://tgs.com.ar./role/SignificantAccountingPoliciesIfrs15RevenueFromContractsWithCustomersDetails
443 Disclosure of disaggregation of revenue from contracts with customers [table] Table

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 ifrs-full:DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersTable
444 Retrospective application and retrospective restatement [axis] Axis ifrs-full:RetrospectiveApplicationAndRetrospectiveRestatementAxis
445 Currently stated [member] Member ifrs-full:RestatedMember
446 Increase (decrease) due to changes in accounting policy and corrections of prior period errors [member] Member ifrs-full:IncreaseDecreaseDueToChangesInAccountingPolicyAndCorrectionsOfPriorPeriodErrorsMember
447 Increase (decrease) due to changes in accounting policy [member] Member ifrs-full:FinancialEffectOfChangesInAccountingPolicyMember
448 Increase (decrease) due to changes in accounting policy required by IFRSs [member] Member ifrs-full:IncreaseDecreaseDueToChangesInAccountingPolicyRequiredByIFRSsMember
449 IFRS 15 Impact [Member] Member ifrs-full:IncreaseDecreaseDueToApplicationOfIFRS15Member
450 New IFRSs [axis] Axis ifrs-full:NewIFRSsAxis
451 New IFRSs [member] Member ifrs-full:NewIFRSsMember
452 IFRS 15 [Member] Member tgs:IFRS15RevenueFromContractsWithCustomersMember
453 Disclosure of disaggregation of revenue from contracts with customers [line items] LineItems ifrs-full:DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersLineItems
454 Impact of New Standards in the Statement of Financial Position [Abstract] Abstract ifrs-full:DescriptionOfExpectedImpactOfInitialApplicationOfNewStandardsOrInterpretationsAbstract
455 Current liabilities [Abstract] Abstract ifrs-full:CurrentLiabilitiesAbstract
456 Advances from customers Concept (Monetary) As Of Credit ifrs-full:CurrentAdvances
457 Contract liabilities Concept (Monetary) As Of Credit ifrs-full:CurrentContractLiabilities
458 Total Concept (Monetary) As Of Credit tgs:NewAccountingPronouncementOrChangeInAccountingPrincipleCumulativeEffectOfChangeOnCurrentLiabilities
459 Non-current liabilities [Abstract] Abstract ifrs-full:NoncurrentLiabilitiesAbstract
460 Advances from customers Concept (Monetary) As Of Credit ifrs-full:NoncurrentAdvances
461 Contract liabilities Concept (Monetary) As Of Credit ifrs-full:NoncurrentContractLiabilities
462 Total Concept (Monetary) As Of Credit tgs:NewAccountingPronouncementOrChangeInAccountingPrincipleCumulativeEffectOfChangeOnNonCurrentLiabilities
463 090402 - Disclosure - SIGNIFICANT ACCOUNTING POLICIES, IFRS 9 Financial Instruments (Details) Network

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 http://tgs.com.ar./role/SignificantAccountingPoliciesIfrs9FinancialInstrumentsDetails
464 Disclosure of financial assets at date of initial application of IFRS 9 [table] Table

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 ifrs-full:DisclosureOfFinancialAssetsAtDateOfInitialApplicationOfIFRS9Table
465 Classes of financial assets [axis] Axis ifrs-full:ClassesOfFinancialAssetsAxis
466 Financial assets, class [member] Member ifrs-full:FinancialAssetsMember
467 Cash and Banks [Member] Member tgs:CashAndBanksMember
468 Mutual Funds [Member] Member tgs:MutualFundsMember
469 Bank Accounts [Member] Member tgs:BankAccountsMember
470 Government Bonds (BONAR 2020) [Member] Member tgs:GovernmentBondsBONAR2020Member
471 Private Bonds [Member] Member tgs:PrivateBondsMember
472 Government Bonds (LETES) [Member] Member tgs:GovernmentBondsLETESMember
473 Government Bonds (Central Bank Notes) [Member] Member tgs:GovernmentBondsCentralBankNotesMember
474 VRD Bonds [Member] Member tgs:VRDBondsMember
475 Trade Receivables [Member] Member ifrs-full:TradeReceivablesMember
476 Other Receivables [Member] Member tgs:OtherReceivablesMember
477 Disclosure of financial assets at date of initial application of IFRS 9 [line items] LineItems ifrs-full:DisclosureOfFinancialAssetsAtDateOfInitialApplicationOfIFRS9LineItems
478 Comparison of Measurement Criteria Used for Financial Assets [Abstract] Abstract ifrs-full:DisclosureOfFinancialAssetsAtDateOfInitialApplicationOfIFRS9Abstract
479 Classification under IAS 39 Concept (Text/String) For Period ifrs-full:FinancialAssetsMeasurementCategoryImmediatelyBeforeInitialApplicationOfIFRS9
480 Classification under IFRS 9 Concept (Text/String) For Period ifrs-full:FinancialAssetsMeasurementCategoryImmediatelyAfterInitialApplicationOfIFRS9
481 090404 - Disclosure - SIGNIFICANT ACCOUNTING POLICIES, Consolidation and Regulatory Framework (Details) Network

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 http://tgs.com.ar./role/SignificantAccountingPoliciesConsolidationAndRegulatoryFrameworkDetails
482 Disclosure of associates [table] Table

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 ifrs-full:DisclosureOfSignificantInvestmentsInAssociatesTable
483 Associates [axis] Axis ifrs-full:SignificantInvestmentsInAssociatesAxis
484 Entity's total for associates [member] Member ifrs-full:EntitysTotalForAssociatesMember
485 TGU [Member] Member tgs:TransporteYServiciosDeGasEnUruguaySAMember
486 EGS [Member] Member tgs:EmprendimientosDeGasDelSurSAMember
487 Link [Member] Member tgs:GasLinkSAMember
488 Range [Axis] Axis ifrs-full:RangeAxis
489 Ranges [member] Member ifrs-full:RangesMember
490 Top of Range [Member] Member ifrs-full:TopOfRangeMember
491 Bottom of Range [Member] Member ifrs-full:BottomOfRangeMember
492 Disclosure of associates [line items] LineItems ifrs-full:DisclosureOfSignificantInvestmentsInAssociatesLineItems
493 Associates [Abstract] Abstract ifrs-full:DisclosureOfSignificantInvestmentsInAssociatesAbstract
494 Company Concept (Text/String) For Period ifrs-full:NameOfAssociate
495 Shareholding and voting Concept (Percent) For Period ifrs-full:ProportionOfVotingPowerHeldInAssociate
496 Country Concept (Text/String) For Period ifrs-full:CountryOfIncorporationOrResidenceOfAssociate
497 Main activity Concept (Text/String) For Period tgs:MainActivitiesAssociates
498 Closing date Concept (invest:dateStringItemType) For Period tgs:ClosingDateAssociates
499 090404 - Disclosure - SIGNIFICANT ACCOUNTING POLICIES, Consolidation and Regulatory Framework (Details) Network

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 http://tgs.com.ar./role/SignificantAccountingPoliciesConsolidationAndRegulatoryFrameworkDetails
500 Disclosure of subsidiaries [table] Table

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 ifrs-full:DisclosureOfSignificantInvestmentsInSubsidiariesTable
501 Subsidiaries [axis] Axis ifrs-full:SignificantInvestmentsInSubsidiariesAxis
502 Entity's total for subsidiaries [member] Member ifrs-full:EntitysTotalForSubsidiariesMember
503 Telcosur [Member] Member tgs:TelcosurSAMember
504 CTG [Member] Member tgs:CTGEnergiaSAMember
505 Disclosure of subsidiaries [line items] LineItems ifrs-full:DisclosureOfSignificantInvestmentsInSubsidiariesLineItems
506 Subsidiary [Abstract] Abstract ifrs-full:DisclosureOfSignificantInvestmentsInSubsidiariesAbstract
507 Company Concept (Text/String) For Period ifrs-full:NameOfSubsidiary
508 Shareholding and votes Concept (Percent) For Period ifrs-full:ProportionOfVotingPowerHeldInSubsidiary
509 Country Concept (Text/String) For Period ifrs-full:CountryOfIncorporationOrResidenceOfSubsidiary
510 Closing date Concept (invest:dateStringItemType) For Period tgs:ClosingDateSubsidiaries
511 Main activity Concept (Text/String) For Period tgs:MainActivitiesSubsidiaries
512 090406 - Disclosure - SIGNIFICANT ACCOUNTING POLICIES, Restatement of Statement of Cash Flows IAS 29 (Details) Network

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 http://tgs.com.ar./role/SignificantAccountingPoliciesRestatementOfStatementOfCashFlowsIas29Details
513 Disclosure of expected impact of initial application of new standards or interpretations [table] Table

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 ifrs-full:DescriptionOfExpectedImpactOfInitialApplicationOfNewStandardsOrInterpretationsTable
514 Retrospective application and retrospective restatement [axis] Axis ifrs-full:RetrospectiveApplicationAndRetrospectiveRestatementAxis
515 Currently stated [member] Member ifrs-full:RestatedMember
516 Previously Reported [Member] Member ifrs-full:PreviouslyStatedMember
517 Increase (decrease) due to changes in accounting policy and corrections of prior period errors [member] Member ifrs-full:IncreaseDecreaseDueToChangesInAccountingPolicyAndCorrectionsOfPriorPeriodErrorsMember
518 Increase Due to Adjustment of Common Stock [Member] Member tgs:IncreaseDecreaseDueToApplicationOfNewAccountingPolicyCommonStockMember
519 (Decrease) / Increase in Accumulated Retained Earnings [Member] Member tgs:IncreaseDecreaseDueToApplicationOfNewAccountingPolicyAccumulatedRetainedEarningsMember
520 Gain on Net Monetary Position [Member] Member tgs:IncreaseDecreaseDueToApplicationOfNewAccountingPolicyMonetaryPositionMember
521 Restatement of Income / (Expense) Items Including Income Tax [Member] Member tgs:IncreaseDecreaseDueToApplicationOfNewAccountingPolicyRestatementOfIncomeExpenseItemsMember
522 New IFRSs [axis] Axis ifrs-full:NewIFRSsAxis
523 New IFRSs [member] Member ifrs-full:NewIFRSsMember
524 IAS 29 [Member] Member tgs:IAS29FinancialReportingInHyperinflationaryEconomiesMember
525 Disclosure of expected impact of initial application of new standards or interpretations [line items] LineItems ifrs-full:DescriptionOfExpectedImpactOfInitialApplicationOfNewStandardsOrInterpretationsLineItems
526 Effect of new standards adopted [Abstract] Abstract tgs:EffectOfNewStandardsAdoptedAbstract
527 Total equity according to financial statements Concept (Monetary) As Of Credit ifrs-full:Equity
528 Total comprehensive income for the year Concept (Monetary) For Period Credit ifrs-full:ComprehensiveIncome
529 090408 - Disclosure - SIGNIFICANT ACCOUNTING POLICIES, Property, Plant and Equipment (Details) Network

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 http://tgs.com.ar./role/SignificantAccountingPoliciesPropertyPlantAndEquipmentDetails
530 Disclosure of detailed information about property, plant and equipment [table] Table

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 ifrs-full:DisclosureOfPropertyPlantAndEquipmentTable
531 Transferred financial assets that are not derecognised in their entirety [axis] Axis ifrs-full:FinancialAssetsWhichDoNotQualifyForDerecognitionAxis
532 Transferred financial assets that are not derecognised in their entirety [member] Member ifrs-full:FinancialAssetsWhichDoNotQualifyForDerecognitionMember
533 GdE [member] Member tgs:GasDelEstadoSEMember
534 Disclosure of detailed information about property, plant and equipment [line items] LineItems ifrs-full:DisclosureOfPropertyPlantAndEquipmentLineItems
535 Property, plant and equipment [Abstract] Abstract ifrs-full:PropertyPlantAndEquipmentAbstract
536 Percentage of common stock considered for assets value Concept (Percent) As Of tgs:PercentageOfCommonStockConsideredForAssetsValue
537 Value of assets, price paid on common stock from privatization of GdE Concept (Monetary) As Of Debit ifrs-full:AssetsRecognisedInEntitysFinancialStatementsInRelationToStructuredEntities
538 Value of common stock from provatization of GdE Concept (Monetary) As Of Credit tgs:ValueOfCommonStock
539 Debt assumed from privatization of GdE Concept (Monetary) As Of Credit ifrs-full:LiabilitiesRecognisedInEntitysFinancialStatementsInRelationToStructuredEntities
540 Property, plant and equipment from privatization of GdE Concept (Monetary) As Of Debit ifrs-full:PropertyPlantAndEquipment
541 Financial expense capitalized Concept (Monetary) For Period Debit tgs:FinancialExpenseCapitalized
542 090410 - Disclosure - SIGNIFICANT ACCOUNTING POLICIES, Income Tax and Deferred Income Tax through Earnings Per Share (Details) Network

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 http://tgs.com.ar./role/SignificantAccountingPoliciesIncomeTaxAndDeferredIncomeTaxThroughEarningsPerShareDetails
543 Implied Table Table

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 implied:Table
544 SIGNIFICANT ACCOUNTING POLICIES [Abstract] Abstract tgs:SignificantAccountingPoliciesAbstract
545 Income tax and deferred income tax [Abstract] Abstract tgs:IncomeTaxAndDeferredIncomeTaxAbstract
546 Provisions for income taxes Concept (Monetary) As Of Credit tgs:IncomeTaxProvision
547 Tax on minimum presumed income ("TOMPI") [Abstract] Abstract tgs:TaxOnMinimumPresumedIncomeAbstract
548 Statutory tax rate on TOMPI Concept (Percent) For Period tgs:ApplicableTaxOnMinimumPresumedIncome
549 Term of carry forward period for excess income tax Concept (xbrli:durationItemType) For Period tgs:TermOfCarryForwardPeriodForExcessIncomeTax
550 Provisions for tax on income presumed income Concept (Monetary) As Of Credit tgs:ProvisionsForTaxOnMinimumPresumedIncome
551 Equity accounts [Abstract] Abstract ifrs-full:EquityAbstract
552 Percentage of legal reserve of net income Concept (Percent) For Period tgs:PercentageOfAggregateAmountOfNetIncomeToSetupLegalReserve
553 Percentage of legal reserve on sum of Capital stock and Adjustment to capital stock balances Concept (Percent) For Period tgs:PercentageOfLegalReserveOnSumOfCapitalStockAndAdjustmentToCapitalStockBalances
554 Earnings per share [Abstract] Abstract ifrs-full:EarningsPerShareAbstract
555 Net income attributable to owners of the Company Concept (Monetary) For Period Credit ifrs-full:ProfitLossAttributableToOwnersOfParent
556 Average number of outstanding shares (in shares) Concept (Shares) For Period ifrs-full:WeightedAverageShares
557 Basic and diluted earnings per share (in pesos per share) Concept (Share) For Period ifrs-full:BasicAndDilutedEarningsLossPerShare
558 090500 - Disclosure - CRITICAL ACCOUNTING ESTIMATES AND JUDGMENTS (Details) Network

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 http://tgs.com.ar./role/CriticalAccountingEstimatesAndJudgmentsDetails
559 Disclosure of tax reform [Table] Table

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*

 tgs:DisclosureOfTaxReformTable
560 Maturity [axis] Axis ifrs-full:MaturityAxis
561 Aggregated time bands [member] Member ifrs-full:AggregatedTimeBandsMember
562 2018 [Member] Member tgs:YearOneMember
563 2019 [Member] Member tgs:YearTwoMember
564 2020 and Onwards [Member] Member tgs:YearThreeMember
565 Disclosure of tax reform [Line Items] LineItems tgs:DisclosureOfTaxReformLineItems
566 Tax Reform [Abstract] Abstract tgs:IncomeTaxReformsAbstract
567 Income tax rate Concept (Percent) For Period ifrs-full:ApplicableTaxRate
568 090600 - Disclosure - SUPPLEMENTAL CASH FLOW INFORMATION (Details) Network

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*

 http://tgs.com.ar./role/SupplementalCashFlowInformationDetails
569 Implied Table Table

*

*

 implied:Table
570 SUPPLEMENTAL CASH FLOW INFORMATION [Abstract] Abstract tgs:SUPPLEMENTALCASHFLOWINFORMATIONAbstract
571 Non-cash Investing and Financing Activities [Abstract] Abstract tgs:NoncashInvestingAndFinancingActivitiesAbstract
572 Unpaid acquisition of PPE Concept (Monetary) For Period Credit tgs:UnpaidAcquisitionOfPropertyPlantAndEquipment
573 Principal payment of financial lease Concept (Monetary) For Period Credit tgs:PrincipalPaymentOfFinanceLease
574 Leasing for PPE acquisition Concept (Monetary) For Period Credit tgs:LeasingOfPropertyPlantAndEquipmentAcquisition
575 090700 - Disclosure - CONSOLIDATED BUSINESS SEGMENT INFORMATION (Details) Network

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 http://tgs.com.ar./role/ConsolidatedBusinessSegmentInformationDetails
576 Disclosure of operating segments [table] Table

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 ifrs-full:DisclosureOfOperatingSegmentsTable
577 Segment consolidation items [axis] Axis ifrs-full:SegmentConsolidationItemsAxis
578 Entity's total for segment consolidation items [member] Member ifrs-full:EntitysTotalForSegmentConsolidationItemsMember
579 Reportable Segments [Member] Member ifrs-full:OperatingSegmentsMember
580 Eliminations [Member] Member ifrs-full:EliminationOfIntersegmentAmountsMember
581 Segments [axis] Axis ifrs-full:SegmentsAxis
582 Segments [member] Member ifrs-full:SegmentsMember
583 Natural Gas Transportation [Member] Member tgs:NaturalGasTransportationMember
584 Production and Commercialization of Liquids [Member] Member tgs:ProductionAndCommercializationOfLiquidsMember
585 Other Services [Member] Member tgs:OtherServicesMember
586 Telecommunications [Member] Member tgs:TelecommunicationsMember
587 Disclosure of operating segments [line items] LineItems ifrs-full:DisclosureOfOperatingSegmentsLineItems
588 Operating segments [Abstract] Abstract tgs:OperatingSegmentsAbstract
589 Number of reportable segments Concept (Integer) For Period tgs:NumberOfReportableSegment
590 Revenues Concept (Monetary) For Period Credit ifrs-full:Revenue
591 Cost of sales Concept (Monetary) For Period Debit ifrs-full:CostOfSales
592 Administrative expenses Concept (Monetary) For Period Debit ifrs-full:AdministrativeExpense
593 Selling expenses Concept (Monetary) For Period Debit ifrs-full:SellingExpense
594 Other operating expenses Concept (Monetary) For Period Credit ifrs-full:OtherOperatingIncomeExpense
595 Operating profit Concept (Monetary) For Period Credit ifrs-full:ProfitLossFromOperatingActivities
596 Depreciation of property, plant and equipment Concept (Monetary) For Period ifrs-full:DepreciationPropertyPlantAndEquipment
597 Identifiable assets Concept (Monetary) As Of Debit ifrs-full:Assets
598 Identifiable liabilities Concept (Monetary) As Of Credit ifrs-full:Liabilities
599 090800 - Disclosure - DETAIL OF SIGNIFICANT STATEMENT OF FINANCIAL POSITION AND STATEMENT OF COMPREHENSIVE INCOME CAPTIONS, Other Receivables (Details) Network

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 http://tgs.com.ar./role/DetailOfSignificantStatementOfFinancialPositionAndStatementOfComprehensiveIncomeCaptionsOtherReceivablesDetails
600 Implied Table Table

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 implied:Table
601 DETAIL OF SIGNIFICANT STATEMENT OF FINANCIAL POSITION AND STATEMENT OF COMPREHENSIVE INCOME CAPTIONS [Abstract] Abstract tgs:DetailOfSignificantStatementOfFinancialPositionAndStatementOfComprehensiveIncomeCaptionsAbstract
602 Other Receivables [Abstract] Abstract tgs:OtherReceivablesAbstract
603 Current [Abstract] Abstract tgs:CurrentOtherReceivablesAbstract
604 VAT credit balance Concept (Monetary) As Of Debit ifrs-full:CurrentValueAddedTaxReceivables
605 Other tax receivables Concept (Monetary) As Of Debit ifrs-full:CurrentReceivablesFromTaxesOtherThanIncomeTax
606 Prepaid expenses Concept (Monetary) As Of Debit ifrs-full:CurrentPrepaidExpenses
607 Advances to suppliers Concept (Monetary) As Of Debit ifrs-full:CurrentAdvancesToSuppliers
608 Subsidies receivables Concept (Monetary) As Of Credit ifrs-full:CurrentGovernmentGrants
609 Guaranteed deposits Concept (Monetary) As Of Debit tgs:CurrentGuaranteedDeposits
610 Other Receivables UT Concept (Monetary) As Of Debit tgs:CurrentOtherReceivablesFromJointOperation
611 Others Concept (Monetary) As Of Debit tgs:CurrentOtherReceivables
612 Total Concept (Monetary) As Of Debit ifrs-full:OtherCurrentReceivables
613 Non Current [Abstract] Abstract tgs:NonCurrentOtherReceivablesAbstract
614 VAT credit balance Concept (Monetary) As Of Debit ifrs-full:NoncurrentValueAddedTaxReceivables
615 Other tax receivables Concept (Monetary) As Of Debit ifrs-full:NoncurrentReceivablesFromTaxesOtherThanIncomeTax
616 Prepaid expenses Concept (Monetary) As Of Debit ifrs-full:NoncurrentPrepayments
617 Advances to suppliers Concept (Monetary) As Of Debit tgs:NonCurrentAdvancesToSuppliers
618 Subsidies receivables Concept (Monetary) As Of Credit ifrs-full:NoncurrentGovernmentGrants
619 Guaranteed deposits Concept (Monetary) As Of Debit tgs:NonCurrentGuaranteedDeposits
620 Other Receivables UT Concept (Monetary) As Of Debit tgs:NonCurrentOtherReceivablesFromJointOperation
621 Others Concept (Monetary) As Of Debit tgs:NonCurrentOtherReceivables
622 Total Concept (Monetary) As Of Debit ifrs-full:OtherNoncurrentReceivables
623 090802 - Disclosure - DETAIL OF SIGNIFICANT STATEMENT OF FINANCIAL POSITION AND STATEMENT OF COMPREHENSIVE INCOME CAPTIONS, Trade Receivables (Details) Network

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 http://tgs.com.ar./role/DetailOfSignificantStatementOfFinancialPositionAndStatementOfComprehensiveIncomeCaptionsTradeReceivablesDetails
624 Disclosure of Trade Receivables [Table] Table

*

*

 tgs:DisclosureOfTradeReceivablesTable
625 Segments [axis] Axis ifrs-full:SegmentsAxis
626 Segments [member] Member ifrs-full:SegmentsMember
627 UT [Member] Member tgs:UTJointOperationMember
628 Natural Gas Transportation [Member] Member tgs:NaturalGasTransportationMember
629 Production and Commercialization of Liquids [Member] Member tgs:ProductionAndCommercializationOfLiquidsMember
630 Other Services [Member] Member tgs:OtherServicesMember
631 Disclosure of Trade Receivables [Line Items] LineItems tgs:DisclosureOfTradeReceivablesLineItems
632 Trade Receivables [Abstract] Abstract tgs:TradeReceivablesAbstract
633 Current [Abstract] Abstract tgs:CurrentTradeReceivablesAbstract
634 Commons Concept (Monetary) As Of Debit tgs:CurrentOrdinaryTradeReceivables
635 Related parties Concept (Monetary) As Of Debit ifrs-full:TradeAndOtherCurrentReceivablesDueFromRelatedParties
636 Allowance for doubtful accounts Concept (Monetary) As Of Credit tgs:AllowanceAccountForCreditLossesOfFinancialAssetsCurrent
637 Total Concept (Monetary) As Of Debit ifrs-full:CurrentTradeReceivables
638 Non Current [Abstract] Abstract tgs:NonCurrentTradeReceivablesAbstract
639 Commons Concept (Monetary) As Of Debit tgs:NonCurrentOrdinaryTradeReceivables
640 Related parties Concept (Monetary) As Of Debit ifrs-full:NoncurrentReceivablesDueFromRelatedParties
641 Allowance for doubtful accounts Concept (Monetary) As Of Credit tgs:AllowanceAccountForCreditLossesOfFinancialAssetsNonCurrent
642 Total Concept (Monetary) As Of Debit ifrs-full:NoncurrentTradeReceivables
643 Allowance for doubtful accounts [Abstract] Abstract ifrs-full:ReconciliationOfChangesInAllowanceAccountForCreditLossesOfFinancialAssetsAbstract
644 Balance at the beginning of the period Concept (Monetary) As Of Credit ifrs-full:AllowanceAccountForCreditLossesOfFinancialAssets
645 Inflation adjustment restatement Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseThroughOtherChangesAllowanceAccountForCreditLossesOfFinancialAssets
646 Additions Concept (Monetary) For Period ifrs-full:AdditionalAllowanceRecognisedInProfitOrLossAllowanceAccountForCreditLossesOfFinancialAssets
647 Applications Concept (Monetary) For Period Debit ifrs-full:UtilisationAllowanceAccountForCreditLossesOfFinancialAssets
648 Decreases Concept (Monetary) For Period ifrs-full:ReversalAllowanceAccountForCreditLossesOfFinancialAssets
649 Balance at the end of period Concept (Monetary) As Of Credit ifrs-full:AllowanceAccountForCreditLossesOfFinancialAssets
650 090804 - Disclosure - DETAIL OF SIGNIFICANT STATEMENT OF FINANCIAL POSITION AND STATEMENT OF COMPREHENSIVE INCOME CAPTIONS, Cash and Cash Equivalents (Details) Network

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 http://tgs.com.ar./role/DetailOfSignificantStatementOfFinancialPositionAndStatementOfComprehensiveIncomeCaptionsCashAndCashEquivalentsDetails
651 Implied Table Table

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*

 implied:Table
652 DETAIL OF SIGNIFICANT STATEMENT OF FINANCIAL POSITION AND STATEMENT OF COMPREHENSIVE INCOME CAPTIONS [Abstract] Abstract tgs:DetailOfSignificantStatementOfFinancialPositionAndStatementOfComprehensiveIncomeCaptionsAbstract
653 Cash and cash equivalents [Abstract] Abstract ifrs-full:CashAndCashEquivalentsAbstract
654 Cash and banks Concept (Monetary) As Of Debit ifrs-full:Cash
655 UT Cash and banks Concept (Monetary) As Of Debit tgs:CashAndBanksHeldForJointOperations
656 Mutual funds Concept (Monetary) As Of Debit tgs:MutualFunds
657 Bank account Concept (Monetary) As Of Debit tgs:BankAccount
658 Interest-bearing accounts Concept (Monetary) As Of Debit tgs:InterestBearingAccounts
659 UT Mutual funds Concept (Monetary) As Of Debit tgs:UTMutualFunds
660 Total Concept (Monetary) As Of Debit ifrs-full:CashAndCashEquivalents
661 090806 - Disclosure - DETAIL OF SIGNIFICANT STATEMENT OF FINANCIAL POSITION AND STATEMENT OF COMPREHENSIVE INCOME CAPTIONS, Contract Liabilities (Details) Network

*

*

 http://tgs.com.ar./role/DetailOfSignificantStatementOfFinancialPositionAndStatementOfComprehensiveIncomeCaptionsContractLiabilitiesDetails
662 Contract Liabilities [Table] Table

*

*

 tgs:ContractLiabilitiesTable
663 Segments [axis] Axis ifrs-full:SegmentsAxis
664 Segments [member] Member ifrs-full:SegmentsMember
665 Natural Gas Transportation [Member] Member tgs:NaturalGasTransportationMember
666 Production and Commercialization of Liquids [Member] Member tgs:ProductionAndCommercializationOfLiquidsMember
667 Other Services [Member] Member tgs:OtherServicesMember
668 UT [Member] Member tgs:UTJointOperationMember
669 New IFRSs [axis] Axis ifrs-full:NewIFRSsAxis
670 New IFRSs [member] Member ifrs-full:NewIFRSsMember
671 IFRS 15 [Member] Member tgs:IFRS15RevenueFromContractsWithCustomersMember
672 Contract Liabilities [Line Items] LineItems tgs:ContractLiabilitiesLineItems
673 Current liabilities [abstract] Abstract ifrs-full:CurrentLiabilitiesAbstract
674 Contract liabilities Concept (Monetary) As Of Credit ifrs-full:CurrentContractLiabilities
675 Non Current liabilities [abstract] Abstract ifrs-full:NoncurrentLiabilitiesAbstract
676 Contract liabilities Concept (Monetary) As Of Credit ifrs-full:NoncurrentContractLiabilities
677 Revenue recognized from contracts with customers Concept (Monetary) For Period Credit ifrs-full:RevenueThatWasIncludedInContractLiabilityBalanceAtBeginningOfPeriod
678 090808 - Disclosure - DETAIL OF SIGNIFICANT STATEMENT OF FINANCIAL POSITION AND STATEMENT OF COMPREHENSIVE INCOME CAPTIONS, Advances from Customers (Details) Network

*

*

 http://tgs.com.ar./role/DetailOfSignificantStatementOfFinancialPositionAndStatementOfComprehensiveIncomeCaptionsAdvancesFromCustomersDetails
679 Disclosure of Advances from Customers [Table] Table

*

*

 tgs:AdvancesFromCustomersTable
680 Segments [axis] Axis ifrs-full:SegmentsAxis
681 Segments [member] Member ifrs-full:SegmentsMember
682 Natural Gas Transportation [Member] Member tgs:NaturalGasTransportationMember
683 Production and Commercialization of Liquids [Member] Member tgs:ProductionAndCommercializationOfLiquidsMember
684 Other Services [Member] Member tgs:OtherServicesMember
685 UT [Member] Member tgs:UTJointOperationMember
686 Advances From Customers [Line Items] LineItems tgs:AdvancesFromCustomersLineItems
687 Current [Abstract] Abstract tgs:CurrentAdvancesAbstract
688 Advances from customers Concept (Monetary) As Of Credit ifrs-full:CurrentAdvances
689 Non Current [Abstract] Abstract tgs:NonCurrentAdvancesAbstract
690 Advances from customers Concept (Monetary) As Of Credit ifrs-full:NoncurrentAdvances
691 090810 - Disclosure - DETAIL OF SIGNIFICANT STATEMENT OF FINANCIAL POSITION AND STATEMENT OF COMPREHENSIVE INCOME CAPTIONS, Other Payables (Details) Network

*

*

 http://tgs.com.ar./role/DetailOfSignificantStatementOfFinancialPositionAndStatementOfComprehensiveIncomeCaptionsOtherPayablesDetails
692 Implied Table Table

*

*

 implied:Table
693 DETAIL OF SIGNIFICANT STATEMENT OF FINANCIAL POSITION AND STATEMENT OF COMPREHENSIVE INCOME CAPTIONS [Abstract] Abstract tgs:DetailOfSignificantStatementOfFinancialPositionAndStatementOfComprehensiveIncomeCaptionsAbstract
694 Other Payables [Abstract] Abstract tgs:OtherPayablesAbstract
695 Current [Abstract] Abstract tgs:OtherCurrentPayablesAbstract
696 UT other liabilities Concept (Monetary) As Of Credit tgs:JointOperationsOtherLiabilitiesCurrent
697 Provision for compensation for the Board of Directors and Supervisory Committee Supervisory Committee Concept (Monetary) As Of Credit ifrs-full:CurrentProvisionsForEmployeeBenefits
698 Justice fee payable Concept (Monetary) As Of Credit tgs:CurrentJusticeFeePayable
699 Others Concept (Monetary) As Of Credit tgs:CurrentOtherPayablesOther
700 Total Concept (Monetary) As Of Credit ifrs-full:OtherCurrentPayables
701 Non Current [Abstract] Abstract tgs:OtherNonCurrentPayablesAbstract
702 UT other liabilities Concept (Monetary) As Of Credit tgs:JointOperationsNoncurrentOtherLiabilities
703 Provision for compensation for the Board of Directors and Supervisory Committee Supervisory Commitee Concept (Monetary) As Of Credit ifrs-full:NoncurrentProvisionsForEmployeeBenefits
704 Justice fee payable Concept (Monetary) As Of Credit tgs:NonCurrentJusticeFeePayable
705 Others Concept (Monetary) As Of Credit tgs:NonCurrentOtherPayablesOther
706 Total Concept (Monetary) As Of Credit ifrs-full:OtherNoncurrentPayables
707 090812 - Disclosure - DETAIL OF SIGNIFICANT STATEMENT OF FINANCIAL POSITION AND STATEMENT OF COMPREHENSIVE INCOME CAPTIONS, Taxes Payables (Details) Network

*

*

 http://tgs.com.ar./role/DetailOfSignificantStatementOfFinancialPositionAndStatementOfComprehensiveIncomeCaptionsTaxesPayablesDetails
708 Implied Table Table

*

*

 implied:Table
709 DETAIL OF SIGNIFICANT STATEMENT OF FINANCIAL POSITION AND STATEMENT OF COMPREHENSIVE INCOME CAPTIONS [Abstract] Abstract tgs:DetailOfSignificantStatementOfFinancialPositionAndStatementOfComprehensiveIncomeCaptionsAbstract
710 Taxes Payables [Abstract] Abstract tgs:TaxesPayablesAbstract
711 Current [Abstract] Abstract tgs:CurrentTaxesPayablesAbstract
712 Withholdings and perceptions made to third parties Concept (Monetary) As Of Credit tgs:CurrentWithholdingsForIncomeTaxMadeToThirdParties
713 Health and safety tax Concept (Monetary) As Of Credit tgs:CurrentHealthAndSafetyTax
714 Turnover Tax Concept (Monetary) As Of Credit tgs:CurrentTurnoverTax
715 UT Others Concept (Monetary) As Of Credit tgs:CurrentUTOtherTaxPayables
716 Others Concept (Monetary) As Of Credit tgs:CurrentOtherTaxPayables
717 Total Concept (Monetary) As Of Credit tgs:CurrentTaxesPayables
718 Non-current [Abstract] Abstract tgs:NonCurrentTaxesPayablesAbstract
719 Withholdings and perceptions made to third parties Concept (Monetary) As Of Credit tgs:NonCurrentWithholdingsForIncomeTaxMadeToThirdParties
720 Health and safety tax Concept (Monetary) As Of Credit tgs:NonCurrentTaxOnHealthAndSafetyTax
721 Turnover Tax Concept (Monetary) As Of Credit tgs:NonCurrentTurnoverTax
722 UT Others Concept (Monetary) As Of Credit tgs:NonCurrentUTOtherTaxPayables
723 Others Concept (Monetary) As Of Credit tgs:NonCurrentOtherTaxPayables
724 Total Concept (Monetary) As Of Credit tgs:NonCurrentTaxesPayables
725 090814 - Disclosure - DETAIL OF SIGNIFICANT STATEMENT OF FINANCIAL POSITION AND STATEMENT OF COMPREHENSIVE INCOME CAPTIONS, Trade Payables (Details) Network

*

*

 http://tgs.com.ar./role/DetailOfSignificantStatementOfFinancialPositionAndStatementOfComprehensiveIncomeCaptionsTradePayablesDetails
726 Implied Table Table

*

*

 implied:Table
727 DETAIL OF SIGNIFICANT STATEMENT OF FINANCIAL POSITION AND STATEMENT OF COMPREHENSIVE INCOME CAPTIONS [Abstract] Abstract tgs:DetailOfSignificantStatementOfFinancialPositionAndStatementOfComprehensiveIncomeCaptionsAbstract
728 Trade Payables [Abstract] Abstract tgs:TradePayablesAbstract
729 Current [Abstract] Abstract tgs:CurrentTradePayablesAbstract
730 Suppliers Concept (Monetary) As Of Credit tgs:CurrentTradePayablesToSuppliers
731 UT Suppliers Concept (Monetary) As Of Credit tgs:CurrentTradePayablesToSuppliersForJointOperations
732 Customers (credit balances) Concept (Monetary) As Of Credit tgs:CurrentPayablesToCustomers
733 Related parties Concept (Monetary) As Of Credit ifrs-full:TradeAndOtherCurrentPayablesToRelatedParties
734 Total Concept (Monetary) As Of Credit ifrs-full:TradeAndOtherCurrentPayablesToTradeSuppliers
735 Non-current [Abstract] Abstract tgs:NonCurrentTradePayablesAbstract
736 Suppliers Concept (Monetary) As Of Credit tgs:NonCurrentTradePayablesToSuppliers
737 UT Suppliers Concept (Monetary) As Of Credit tgs:NonCurrentTradePayablesToSuppliersForJointOperations
738 Customers (credit balances) Concept (Monetary) As Of Credit tgs:NonCurrentPayablesToCustomers
739 Related parties Concept (Monetary) As Of Credit ifrs-full:NoncurrentPayablesToRelatedParties
740 Total Concept (Monetary) As Of Credit ifrs-full:NoncurrentPayablesToTradeSuppliers
741 090816 - Disclosure - DETAIL OF SIGNIFICANT STATEMENT OF FINANCIAL POSITION AND STATEMENT OF COMPREHENSIVE INCOME CAPTIONS, Revenues (Details) Network

*

*

 http://tgs.com.ar./role/DetailOfSignificantStatementOfFinancialPositionAndStatementOfComprehensiveIncomeCaptionsRevenuesDetails
742 Implied Table Table

*

*

 implied:Table
743 DETAIL OF SIGNIFICANT STATEMENT OF FINANCIAL POSITION AND STATEMENT OF COMPREHENSIVE INCOME CAPTIONS [Abstract] Abstract tgs:DetailOfSignificantStatementOfFinancialPositionAndStatementOfComprehensiveIncomeCaptionsAbstract
744 Revenues [Abstract] Abstract ifrs-full:DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersAbstract
745 Sales of goods and services Concept (Monetary) For Period Credit ifrs-full:RevenueFromContractsWithCustomers
746 Subsidies Concept (Monetary) For Period Credit ifrs-full:RevenueFromGovernmentGrants
747 Total Concept (Monetary) For Period Credit ifrs-full:Revenue
748 090818 - Disclosure - DETAIL OF SIGNIFICANT STATEMENT OF FINANCIAL POSITION AND STATEMENT OF COMPREHENSIVE INCOME CAPTIONS, Disaggregarion of Revenues by Geographical Market (Details) Network

*

*

 http://tgs.com.ar./role/DetailOfSignificantStatementOfFinancialPositionAndStatementOfComprehensiveIncomeCaptionsDisaggregarionOfRevenuesByGeographicalMarketDetails
749 Disclosure of disaggregation of revenue from contracts with customers [table] Table

*

*

 ifrs-full:DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersTable
750 Segment consolidation items [axis] Axis ifrs-full:SegmentConsolidationItemsAxis
751 Entity's total for segment consolidation items [member] Member ifrs-full:EntitysTotalForSegmentConsolidationItemsMember
752 Reportable Segments [Member] Member ifrs-full:OperatingSegmentsMember
753 Segments [axis] Axis ifrs-full:SegmentsAxis
754 Segments [member] Member ifrs-full:SegmentsMember
755 Natural Gas Transportation [Member] Member tgs:NaturalGasTransportationMember
756 Production and Commercialization of Liquids [Member] Member tgs:ProductionAndCommercializationOfLiquidsMember
757 Other Services [Member] Member tgs:OtherServicesMember
758 Telecommunications [Member] Member tgs:TelecommunicationsMember
759 Geographical areas [axis] Axis ifrs-full:GeographicalAreasAxis
760 Geographical areas [member] Member ifrs-full:GeographicalAreasMember
761 External Market [Member] Member ifrs-full:ForeignCountriesMember
762 Domestic Market [Member] Member ifrs-full:CountryOfDomicileMember
763 Timing of transfer of goods or services [axis] Axis ifrs-full:TimingOfTransferOfGoodsOrServicesAxis
764 Timing of transfer of goods or services [member] Member ifrs-full:TimingOfTransferOfGoodsOrServicesMember
765 Over the Time [Member] Member ifrs-full:GoodsOrServicesTransferredOverTimeMember
766 At a Point in Time [Member] Member ifrs-full:GoodsOrServicesTransferredAtPointInTimeMember
767 Disclosure of disaggregation of revenue from contracts with customers [line items] LineItems ifrs-full:DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersLineItems
768 Revenues [Abstract] Abstract ifrs-full:DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersAbstract
769 Revenues Concept (Monetary) For Period Credit ifrs-full:Revenue
770 090820 - Disclosure - DETAIL OF SIGNIFICANT STATEMENT OF FINANCIAL POSITION AND STATEMENT OF COMPREHENSIVE INCOME CAPTIONS, Disaggregation of Revenues by Business Segment (Details) Network

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 http://tgs.com.ar./role/DetailOfSignificantStatementOfFinancialPositionAndStatementOfComprehensiveIncomeCaptionsDisaggregationOfRevenuesByBusinessSegmentDetails
771 Disclosure of disaggregation of revenue from contracts with customers [table] Table

*

*

 ifrs-full:DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersTable
772 Segment consolidation items [axis] Axis ifrs-full:SegmentConsolidationItemsAxis
773 Entity's total for segment consolidation items [member] Member ifrs-full:EntitysTotalForSegmentConsolidationItemsMember
774 Reportable Segments [Member] Member ifrs-full:OperatingSegmentsMember
775 Segments [axis] Axis ifrs-full:SegmentsAxis
776 Segments [member] Member ifrs-full:SegmentsMember
777 Natural Gas Transportation [Member] Member tgs:NaturalGasTransportationMember
778 Production and Commercialization of Liquids [Member] Member tgs:ProductionAndCommercializationOfLiquidsMember
779 Other Services [Member] Member tgs:OtherServicesMember
780 Telecommunications [Member] Member tgs:TelecommunicationsMember
781 Products and services [axis] Axis ifrs-full:ProductsAndServicesAxis
782 Products and services [member] Member ifrs-full:ProductsAndServicesMember
783 Firm [Member] Member tgs:FirmMember
784 Access and Charge [Member] Member tgs:AccessAndChargeMember
785 Interruptible and Others [Member] Member tgs:InterruptibleAndOthersMember
786 Product [Member] Member tgs:ProductsMember
787 Services [Member] Member tgs:ServicesMember
788 Government Grants [Member] Member tgs:GovernmentGrantsMember
789 Conditioning and Treatment [Member] Member tgs:ConditioningAndTreatmentMember
790 Operation and Maintenance [Member] Member tgs:OperationAndMaintenanceMember
791 Steam Sales [Member] Member tgs:SteamSalesMember
792 Construction [Member] Member tgs:ConstructionsMember
793 UT Construction [Member] Member tgs:UTConstructionMember
794 Others [Member] Member tgs:OthersProductsAndServicesMember
795 Disclosure of disaggregation of revenue from contracts with customers [line items] LineItems ifrs-full:DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersLineItems
796 Revenues [Abstract] Abstract ifrs-full:DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersAbstract
797 Revenues Concept (Monetary) For Period Credit ifrs-full:Revenue
798 090822 - Disclosure - DETAIL OF SIGNIFICANT STATEMENT OF FINANCIAL POSITION AND STATEMENT OF COMPREHENSIVE INCOME CAPTIONS, Cost of Sales (Details) Network

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 http://tgs.com.ar./role/DetailOfSignificantStatementOfFinancialPositionAndStatementOfComprehensiveIncomeCaptionsCostOfSalesDetails
799 Implied Table Table

*

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 implied:Table
800 DETAIL OF SIGNIFICANT STATEMENT OF FINANCIAL POSITION AND STATEMENT OF COMPREHENSIVE INCOME CAPTIONS [Abstract] Abstract tgs:DetailOfSignificantStatementOfFinancialPositionAndStatementOfComprehensiveIncomeCaptionsAbstract
801 Cost of Sales [Abstract] Abstract tgs:CostOfSalesAbstract
802 Reconciliation of Changes in Inventories [Abstract] Abstract tgs:ReconciliationOfChangesInInventoriesAbstract
803 Inventories at the beginning of the year Concept (Monetary) As Of Debit ifrs-full:Inventories
804 Puchases Concept (Monetary) For Period Debit tgs:AdditionsToInventory
805 Operating costs Concept (Monetary) For Period Debit ifrs-full:CostOfInventoriesRecognisedAsExpenseDuringPeriod
806 Inventories at the end of the year Concept (Monetary) As Of Debit ifrs-full:Inventories
807 Total Concept (Monetary) For Period Debit ifrs-full:CostOfSales
808 090824 - Disclosure - DETAIL OF SIGNIFICANT STATEMENT OF FINANCIAL POSITION AND STATEMENT OF COMPREHENSIVE INCOME CAPTIONS, Expenses by Nature (Details) Network

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 http://tgs.com.ar./role/DetailOfSignificantStatementOfFinancialPositionAndStatementOfComprehensiveIncomeCaptionsExpensesByNatureDetails
809 Disclosure of Expenses by Nature [Table] Table

*

*

 tgs:NewLabelTextRequiredTable
810 Continuing and discontinued operations [axis] Axis ifrs-full:ContinuingAndDiscontinuedOperationsAxis
811 Aggregate continuing and discontinued operations [member] Member ifrs-full:AggregateContinuingAndDiscontinuedOperationsMember
812 Operating Expenses, Regulated Activities [Member] Member tgs:OperatingExpensesRegulatedActivitiesMember
813 Operating Expenses, Non Regulated Activities [Member] Member tgs:OperatingExpensesNonRegulatedActivitiesMember
814 Administrative Expenses [Member] Member tgs:AdministrativeExpensesMember
815 Selling Expenses [Member] Member tgs:SellingExpensesMember
816 Financial Expenses [Member] Member tgs:FinancialExpensesMember
817 Disclosure of Expenses by Nature [Line Items] LineItems tgs:DisclosureOfExpensesByNatureLineItems
818 Expenses by Nature [abstract] Abstract ifrs-full:ExpenseByNatureAbstract
819 Salaries, wages and other compensations Concept (Monetary) For Period Debit ifrs-full:WagesAndSalaries
820 Social security taxes Concept (Monetary) For Period Debit tgs:SocialSecurityTaxes
821 Compensation to Directors and Supervisory Committee Concept (Monetary) For Period Debit ifrs-full:DirectorsRemunerationExpense
822 Professional services fees Concept (Monetary) For Period Debit ifrs-full:ProfessionalFeesExpense
823 Technical operator assistance fees Concept (Monetary) For Period Debit tgs:TechnicalOperatorAssistanceFeesRelatedPartyTransactions
824 Materials Concept (Monetary) For Period Debit ifrs-full:RawMaterialsAndConsumablesUsed
825 Third parties services Concept (Monetary) For Period Debit ifrs-full:ServicesExpense
826 Telecommunications and post expenses Concept (Monetary) For Period Debit ifrs-full:CommunicationExpense
827 Rents Concept (Monetary) For Period Debit ifrs-full:RentalExpense
828 Transports and freight Concept (Monetary) For Period Debit ifrs-full:TransportationExpense
829 Easements Concept (Monetary) For Period Debit tgs:EasementsExpense
830 Offices supplies Concept (Monetary) For Period Debit tgs:OfficesSupplies
831 Travels expenses Concept (Monetary) For Period Debit ifrs-full:TravelExpense
832 Insurance Concept (Monetary) For Period Debit ifrs-full:InsuranceExpense
833 Property, plant and equipment maintenance Concept (Monetary) For Period Debit ifrs-full:PropertyManagementExpense
834 Depreciation of property, plant and equipment Concept (Monetary) For Period Debit ifrs-full:DepreciationExpense
835 Taxes and contributions Concept (Monetary) For Period Debit ifrs-full:TaxExpenseOtherThanIncomeTaxExpense
836 Advertising Concept (Monetary) For Period Debit ifrs-full:AdvertisingExpense
837 Doubtful accounts Concept (Monetary) For Period Debit tgs:AdjustmentsForDoubtfulAccounts
838 Banks expenses Concept (Monetary) For Period Debit ifrs-full:BankAndSimilarCharges
839 Interests expense Concept (Monetary) For Period Debit ifrs-full:InterestExpense
840 Foreign exchange loss Concept (Monetary) For Period Debit ifrs-full:NetForeignExchangeLoss
841 Other financial charges Concept (Monetary) For Period Debit ifrs-full:OtherFinanceCost
842 Derivative financial instruments results Concept (Monetary) For Period Debit tgs:DerivativeFinancialInstrumentsExpenses
843 Costs of services rendered to third parties Concept (Monetary) For Period Debit tgs:CostsOfServicesRenderedToThirdParties
844 Transactions among business segments Concept (Monetary) For Period Debit tgs:TransactionsAmongBusinessSegments
845 Other expenses Concept (Monetary) For Period Debit ifrs-full:OtherExpenseByNature
846 Total Concept (Monetary) For Period Debit ifrs-full:ExpenseByNature
847 Tax on exports Concept (Monetary) For Period Debit tgs:TaxOnExports
848 090826 - Disclosure - DETAIL OF SIGNIFICANT STATEMENT OF FINANCIAL POSITION AND STATEMENT OF COMPREHENSIVE INCOME CAPTIONS, Net Financial Results (Details) Network

*

*

 http://tgs.com.ar./role/DetailOfSignificantStatementOfFinancialPositionAndStatementOfComprehensiveIncomeCaptionsNetFinancialResultsDetails
849 Implied Table Table

*

*

 implied:Table
850 DETAIL OF SIGNIFICANT STATEMENT OF FINANCIAL POSITION AND STATEMENT OF COMPREHENSIVE INCOME CAPTIONS [Abstract] Abstract tgs:DetailOfSignificantStatementOfFinancialPositionAndStatementOfComprehensiveIncomeCaptionsAbstract
851 Financial income [Abstract] Abstract tgs:FinancialIncomeAbstract
852 Derivative financial instrument results Concept (Monetary) For Period Credit tgs:DerivativeFinancialInstrumentsIncome
853 Interest income Concept (Monetary) For Period Credit ifrs-full:InterestIncomeOnOtherFinancialAssets
854 Fair value gains on financial instruments through profit or loss Concept (Monetary) For Period Credit ifrs-full:GainsLossesOnFinancialAssetsAtFairValueThroughProfitOrLoss
855 Foreign exchange gain Concept (Monetary) For Period Credit ifrs-full:NetForeignExchangeGain
856 Subtotal Concept (Monetary) For Period Credit ifrs-full:FinanceIncome
857 Financial expenses [Abstract] Abstract tgs:FinancialExpensesAbstract
858 Interests expense Concept (Monetary) For Period Debit ifrs-full:InterestExpenseOnOtherFinancialLiabilities
859 Foreign exchange loss Concept (Monetary) For Period Debit tgs:NetForeignExchangeLossOnFinancialLiabilities
860 Derivative financial instrument results Concept (Monetary) For Period Debit tgs:DerivativeFinancialInstrumentsExpenses
861 Other financial charges Concept (Monetary) For Period Debit ifrs-full:OtherFinanceCost
862 Less: Capitalized borrowing costs Concept (Monetary) For Period ifrs-full:BorrowingCostsCapitalised
863 Subtotal Concept (Monetary) For Period Debit ifrs-full:FinanceCosts
864 Gain on net monetary results Concept (Monetary) For Period Credit ifrs-full:GainsLossesOnNetMonetaryPosition
865 Total Concept (Monetary) For Period Credit ifrs-full:FinanceIncomeCost
866 090828 - Disclosure - DETAIL OF SIGNIFICANT STATEMENT OF FINANCIAL POSITION AND STATEMENT OF COMPREHENSIVE INCOME CAPTIONS, Other Operating Expenses (Details) Network

*

*

 http://tgs.com.ar./role/DetailOfSignificantStatementOfFinancialPositionAndStatementOfComprehensiveIncomeCaptionsOtherOperatingExpensesDetails
867 Implied Table Table

*

*

 implied:Table
868 DETAIL OF SIGNIFICANT STATEMENT OF FINANCIAL POSITION AND STATEMENT OF COMPREHENSIVE INCOME CAPTIONS [Abstract] Abstract tgs:DetailOfSignificantStatementOfFinancialPositionAndStatementOfComprehensiveIncomeCaptionsAbstract
869 Disposal of property, plant and equipment Concept (Monetary) For Period Credit ifrs-full:GainsLossesOnDisposalsOfPropertyPlantAndEquipment
870 Net increase in provisions Concept (Monetary) For Period Debit tgs:NetIncreaseDecreaseInProvisionsIncludesJudicialCosts
871 Recovery of insurance Concept (Monetary) For Period Credit ifrs-full:IncomeFromReimbursementsUnderInsurancePolicies
872 Write off of other receivables Concept (Monetary) For Period Credit ifrs-full:DecreaseThroughWriteoffFinancialAssets
873 Others Concept (Monetary) For Period Credit tgs:OtherMiscellaneousIncomeExpenses
874 Total Concept (Monetary) For Period Credit ifrs-full:OtherOperatingIncomeExpense
875 090830 - Disclosure - DETAIL OF SIGNIFICANT STATEMENT OF FINANCIAL POSITION AND STATEMENT OF COMPREHENSIVE INCOME CAPTIONS, Other Financial Assets at Fair Value through Profit or Loss (Details) Network

*

*

 http://tgs.com.ar./role/DetailOfSignificantStatementOfFinancialPositionAndStatementOfComprehensiveIncomeCaptionsOtherFinancialAssetsAtFairValueThroughProfitOrLossDetails
876 Implied Table Table

*

*

 implied:Table
877 DETAIL OF SIGNIFICANT STATEMENT OF FINANCIAL POSITION AND STATEMENT OF COMPREHENSIVE INCOME CAPTIONS [Abstract] Abstract tgs:DetailOfSignificantStatementOfFinancialPositionAndStatementOfComprehensiveIncomeCaptionsAbstract
878 Other Financial Assets at Fair Value through Profit or Loss [Abstract] Abstract tgs:OtherFinancialAssetsAtFairValueThroughProfitOrLossAbstract
879 Current [Abstract] Abstract ifrs-full:CurrentFinancialAssetsAtFairValueThroughProfitOrLossAbstract
880 Government bonds Concept (Monetary) As Of Debit tgs:CurrentFinancialAssetsAtFairValueThroughProfitOrLossGovernmentBonds
881 Private bonds Concept (Monetary) As Of Debit tgs:CurrentFinancialAssetsAtFairValueThroughProfitOrLossPrivateBonds
882 Total Concept (Monetary) As Of Debit ifrs-full:CurrentFinancialAssetsAtFairValueThroughProfitOrLoss
883 Non Current [Abstract] Abstract ifrs-full:NoncurrentFinancialAssetsAtFairValueThroughProfitOrLossAbstract
884 Government bonds Concept (Monetary) As Of Debit tgs:NonCurrentFinancialAssetsAtFairValueThroughProfitOrLossGovernmentBonds
885 Private bonds Concept (Monetary) As Of Debit tgs:NonCurrentFinancialAssetsAtFairValueThroughProfitOrLossPrivateBonds
886 Total Concept (Monetary) As Of Debit ifrs-full:NoncurrentFinancialAssetsAtFairValueThroughProfitOrLoss
887 090832 - Disclosure - DETAIL OF SIGNIFICANT STATEMENT OF FINANCIAL POSITION AND STATEMENT OF COMPREHENSIVE INCOME CAPTIONS, Other Financial Assets at Amortized Cost (Details) Network

*

*

 http://tgs.com.ar./role/DetailOfSignificantStatementOfFinancialPositionAndStatementOfComprehensiveIncomeCaptionsOtherFinancialAssetsAtAmortizedCostDetails
888 Implied Table Table

*

*

 implied:Table
889 DETAIL OF SIGNIFICANT STATEMENT OF FINANCIAL POSITION AND STATEMENT OF COMPREHENSIVE INCOME CAPTIONS [Abstract] Abstract tgs:DetailOfSignificantStatementOfFinancialPositionAndStatementOfComprehensiveIncomeCaptionsAbstract
890 Other Financial Assets at Amortized Cost [Abstract] Abstract tgs:OtherFinancialAssetsAtAmortizedCostAbstract
891 Current [Abstract] Abstract tgs:CurrentOtherFinancialAssetsAtAmortizedCostAbstract
892 VRD bonds Concept (Monetary) As Of Debit tgs:CurrentVRDBonds
893 Government Bonds (Argentine National Treasury Notes) Concept (Monetary) As Of Debit tgs:CurrentGovernmentBondsArgentineNationalTreasuryNotes
894 Government Bonds (Central Bank Notes) Concept (Monetary) As Of Debit tgs:CurrentGovernmentBondsCentralBankNotes
895 Total Concept (Monetary) As Of Debit ifrs-full:CurrentFinancialAssetsAtAmortisedCost
896 Non Current [Abstract] Abstract tgs:NonCurrentOtherFinancialAssetsAtAmortizedCostAbstract
897 VRD bonds Concept (Monetary) As Of Debit tgs:NonCurrentVRDBonds
898 Government Bonds (Argentine National Treasury Notes) Concept (Monetary) As Of Debit tgs:NonCurrentGovernmentBondsArgentineNationalTreasuryNotes
899 Government Bonds (Central Bank Notes) Concept (Monetary) As Of Debit tgs:NonCurrentGovernmentBondsCentralBankNotes
900 Total Concept (Monetary) As Of Debit ifrs-full:NoncurrentFinancialAssetsAtAmortisedCost
901 090834 - Disclosure - DETAIL OF SIGNIFICANT STATEMENT OF FINANCIAL POSITION AND STATEMENT OF COMPREHENSIVE INCOME CAPTIONS, Payroll and Social Security Taxes Payable (Details) Network

*

*

 http://tgs.com.ar./role/DetailOfSignificantStatementOfFinancialPositionAndStatementOfComprehensiveIncomeCaptionsPayrollAndSocialSecurityTaxesPayableDetails
902 Implied Table Table

*

*

 implied:Table
903 DETAIL OF SIGNIFICANT STATEMENT OF FINANCIAL POSITION AND STATEMENT OF COMPREHENSIVE INCOME CAPTIONS [Abstract] Abstract tgs:DetailOfSignificantStatementOfFinancialPositionAndStatementOfComprehensiveIncomeCaptionsAbstract
904 Payroll and social security taxes payable [Abstract] Abstract tgs:PayrollAndSocialSecurityTaxesPayableAbstract
905 Current [Abstract] Abstract tgs:CurrentPayrollAndSocialSecurityTaxesPayableAbstract
906 Vacation benefit payable Concept (Monetary) As Of Credit tgs:VacationBenefitPayableCurrent
907 Annual bonus payable Concept (Monetary) As Of Credit tgs:AnnualBonusPayableCurrent
908 Social security taxes payable Concept (Monetary) As Of Credit tgs:SocialSecurityTaxesPayableCurrent
909 UT Concept (Monetary) As Of Credit tgs:JointOperationsPayrollAndSocialSecurityTaxesPayableCurrent
910 Total Concept (Monetary) As Of Credit tgs:PayrollAndSocialSecurityTaxesPayableCurrent
911 Non Current [Abstract] Abstract tgs:NoncurrentPayrollAndSocialSecurityTaxesPayableAbstract
912 Vacation benefit payable Concept (Monetary) As Of Credit tgs:VacationBenefitPayableNonCurrent
913 Annual bonus payable Concept (Monetary) As Of Credit tgs:AnnualBonusPayableNoncurrent
914 Social security taxes payable Concept (Monetary) As Of Credit tgs:SocialSecurityTaxesPayableNoncurrent
915 UT Concept (Monetary) As Of Credit tgs:JointOperationsPayrollAndSocialSecurityTaxesPayableNoncurrent
916 Total Concept (Monetary) As Of Credit tgs:PayrollAndSocialSecurityTaxesPayableNonCurrent
917 090900 - Disclosure - INVESTMENTS IN ASSOCIATES (Details) Network

*

*

 http://tgs.com.ar./role/InvestmentsInAssociatesDetails
918 Disclosure of associates [table] Table

*

*

 ifrs-full:DisclosureOfSignificantInvestmentsInAssociatesTable
919 Associates [axis] Axis ifrs-full:SignificantInvestmentsInAssociatesAxis
920 Entity's total for associates [member] Member ifrs-full:EntitysTotalForAssociatesMember
921 Transporte y Servicios de Gas en Uruguay S.A. Member tgs:TransporteYServiciosDeGasEnUruguaySAMember
922 Emprendimientos de Gas del Sur S.A. [Member] Member tgs:EmprendimientosDeGasDelSurSAMember
923 Gas Link S.A. Member tgs:GasLinkSAMember
924 Disclosure of associates [line items] LineItems ifrs-full:DisclosureOfSignificantInvestmentsInAssociatesLineItems
925 Investments in associates [Abstract] Abstract tgs:DetailsOfInvestmentsInAssociatesAbstract
926 Face value (in pesos per share) Concept (Share) As Of ifrs-full:ParValuePerShare
927 Amount Concept (Monetary) As Of Debit tgs:InvestmentsInAssociatesAmount
928 Cost Concept (Monetary) As Of Debit tgs:InvestmentsInAssociatesCostValue
929 Book value Concept (Monetary) As Of Debit ifrs-full:InvestmentsInAssociates
930 Main business Concept (Text/String) For Period tgs:NatureOfBusinessAssociates
931 Date Concept (invest:dateStringItemType) For Period tgs:FinancialStatementsPeriodOfMostRecentIssuance
932 Common stock Concept (Monetary) As Of Credit ifrs-full:IssuedCapital
933 Net (loss) / income for the year / period Concept (Monetary) For Period Credit ifrs-full:ProfitLoss
934 Shareholders' equity Concept (Monetary) As Of Credit ifrs-full:Equity
935 % of Common Stock Concept (Percent) For Period ifrs-full:ProportionOfVotingPowerHeldInAssociate
936 091000 - Disclosure - JOINT ARRANGEMENTS (Details) Network

*

*

 http://tgs.com.ar./role/JointArrangementsDetails
937 Disclosure of joint operations [table] Table

*

*

 ifrs-full:DisclosureOfJointOperationsTable
938 Joint operations [axis] Axis ifrs-full:JointOperationsAxis
939 Entity's total for joint operations [member] Member ifrs-full:EntitysTotalForJointOperationsMember
940 UT [Member] Member ifrs-full:JointOperationsMember
941 Disclosure of joint operations [line items] LineItems ifrs-full:DisclosureOfJointOperationsLineItems
942 Joint Arrangements [Abstract] Abstract tgs:JointOperationsAbstract
943 Ownership interest percentage Concept (Percent) For Period ifrs-full:ProportionOfOwnershipInterestInJointOperation
944 Consolidated Statements of financial position [Abstract] Abstract ifrs-full:StatementOfFinancialPositionAbstract
945 Non Current assets Concept (Monetary) As Of Debit ifrs-full:NoncurrentAssets
946 Current Assets Concept (Monetary) As Of Debit ifrs-full:CurrentTaxAssets
947 Total assets Concept (Monetary) As Of Debit ifrs-full:Assets
948 Non Current Liabilities Concept (Monetary) As Of Credit ifrs-full:NoncurrentLiabilities
949 Current Liabilities Concept (Monetary) As Of Credit ifrs-full:CurrentLiabilities
950 Total liabilities Concept (Monetary) As Of Credit ifrs-full:Liabilities
951 Consolidated Statements of comprehensive income [Abstract] Abstract ifrs-full:StatementOfComprehensiveIncomeAbstract
952 Gross profit Concept (Monetary) For Period Credit ifrs-full:GrossProfit
953 Operating profit / (loss) Concept (Monetary) For Period Credit ifrs-full:ProfitLossFromOperatingActivities
954 Net Financial results Concept (Monetary) For Period Credit ifrs-full:ProfitLoss
955 Comprehensive income Concept (Monetary) For Period Credit ifrs-full:ComprehensiveIncome
956 091100 - Disclosure - PROFIT FROM ASSOCIATES (Details) Network

*

*

 http://tgs.com.ar./role/ProfitFromAssociatesDetails
957 Disclosure of associates [table] Table

*

*

 ifrs-full:DisclosureOfSignificantInvestmentsInAssociatesTable
958 Associates [axis] Axis ifrs-full:SignificantInvestmentsInAssociatesAxis
959 Entity's total for associates [member] Member ifrs-full:EntitysTotalForAssociatesMember
960 EGS (in liquidation) [Member] Member tgs:EmprendimientosDeGasDelSurSAMember
961 TGU [Member] Member tgs:TransporteYServiciosDeGasEnUruguaySAMember
962 Link [Member] Member tgs:GasLinkSAMember
963 Disclosure of associates [line items] LineItems ifrs-full:DisclosureOfSignificantInvestmentsInAssociatesLineItems
964 Profit from associates [Abstract] Abstract ifrs-full:ShareOfProfitLossOfAssociatesAndJointVenturesAccountedForUsingEquityMethodAbstract
965 Profit from associates Concept (Monetary) For Period Credit ifrs-full:ShareOfProfitLossOfAssociatesAccountedForUsingEquityMethod
966 091200 - Disclosure - PROPERTY, PLANT AND EQUIPMENT (Details) Network

*

*

 http://tgs.com.ar./role/PropertyPlantAndEquipmentDetails
967 Disclosure of detailed information about property, plant and equipment [table] Table

*

*

 ifrs-full:DisclosureOfPropertyPlantAndEquipmentTable
968 Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis] Axis ifrs-full:CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis
969 Carrying amount [member] Member ifrs-full:CarryingAmountMember
970 Cost [Member] Member ifrs-full:GrossCarryingAmountMember
971 Depreciation [Member] Member ifrs-full:AccumulatedDepreciationAndAmortisationMember
972 Classes of property, plant and equipment [axis] Axis ifrs-full:ClassesOfPropertyPlantAndEquipmentAxis
973 Property, plant and equipment [member] Member ifrs-full:PropertyPlantAndEquipmentMember
974 Pipelines [Member] Member tgs:PipelineMember
975 Compressor Plants [Member] Member tgs:CompressorPlantsMember
976 Other Plants [Member] Member tgs:OtherPlantsMember
977 Stations of Regulation and/or Measurement of Pressure [Member] Member tgs:StationsOfRegulationAndMeasurementOfPressureMember
978 Other Technical Installations [Member] Member tgs:OtherTechnicalInstallationsMember
979 Subtotal Assets Related to Natural Gas Transportation Service [Member] Member tgs:SubtotalAssetsRelatedToNaturalGasTransportationServiceMember
980 Assets Related to Natural Gas Upstream Service [Member] Member tgs:AssetsRelatedToNaturalGasUpstreamServiceMember
981 Assets Related to Liquids Production and Commercialization Service [Member] Member tgs:AssetsRelatedToLiquidsProductionAndCommercializationServiceMember
982 Lands [Member] Member ifrs-full:LandMember
983 Buildings and Constructions [Member] Member ifrs-full:BuildingsMember
984 Fittings and Features in Building [Member] Member ifrs-full:FixturesAndFittingsMember
985 Machinery, Equipment and Tools [Member] Member ifrs-full:MachineryMember
986 UT Machinery, Equipment and Tools [Member] Member tgs:JointOperationsMachineryEquipmentAndToolsMember
987 Computers and Telecommunication Systems [Member] Member ifrs-full:ComputerEquipmentMember
988 Vehicles [Member] Member ifrs-full:VehiclesMember
989 Furniture [Member] Member tgs:FurnitureMember
990 Materials [Member] Member tgs:MaterialsMember
991 Line Pack [Member] Member tgs:LinePackMember
992 Works in Progress [Member] Member ifrs-full:ConstructionInProgressMember
993 Range [Axis] Axis ifrs-full:RangeAxis
994 Ranges [member] Member ifrs-full:RangesMember
995 Bottom of Range [Member] Member ifrs-full:BottomOfRangeMember
996 Top of Range [Member] Member ifrs-full:TopOfRangeMember
997 Disclosure of detailed information about property, plant and equipment [line items] LineItems ifrs-full:DisclosureOfPropertyPlantAndEquipmentLineItems
998 Reconciliation of changes in property, plant and equipment [Abstract] Abstract ifrs-full:ReconciliationOfChangesInPropertyPlantAndEquipmentAbstract
999 Beginning of the year Concept (Monetary) As Of Debit ifrs-full:PropertyPlantAndEquipment
1000 Additions Concept (Monetary) For Period Debit ifrs-full:AdditionsOtherThanThroughBusinessCombinationsPropertyPlantAndEquipment
1001 Retirements Concept (Monetary) For Period Credit ifrs-full:RetirementsPropertyPlantAndEquipment
1002 Transfers Concept (Monetary) For Period Debit ifrs-full:IncreaseDecreaseThroughTransfersPropertyPlantAndEquipment
1003 Depreciation Concept (Monetary) For Period ifrs-full:DepreciationPropertyPlantAndEquipment
1004 Depreciation rate % Concept (Percent) For Period tgs:DepreciationPercentagePropertyPlantAndEquipment
1005 End of the year Concept (Monetary) As Of Debit ifrs-full:PropertyPlantAndEquipment
1006 091200 - Disclosure - PROPERTY, PLANT AND EQUIPMENT (Details) Network

*

*

 http://tgs.com.ar./role/PropertyPlantAndEquipmentDetails
1007 Implied Table Table

*

*

 implied:Table
1008 PROPERTY, PLANT AND EQUIPMENT [Abstract] Abstract ifrs-full:PropertyPlantAndEquipmentAbstract
1009 Financial Lease [Abstract] Abstract tgs:FinancialLeaseAbstract
1010 Cost-Capitalized financial leasing Concept (Monetary) As Of Credit tgs:CostCapitalizedFinancialLease
1011 Accumulated depreciation Concept (Monetary) As Of Debit tgs:AccumulatedDepreciationFinancialLease
1012 Total Concept (Monetary) As Of Credit tgs:NetFinancialLease
1013 Financial leasing agreement expiration date Concept (Date) For Period tgs:FinancialLeasingAgreementExpirationDate
1014 091300 - Disclosure - LOANS, Short-term and Long-term Loans (Details) Network

*

*

 http://tgs.com.ar./role/LoansShorttermAndLongtermLoansDetails
1015 Implied Table Table

*

*

 implied:Table
1016 LOANS [Abstract] Abstract ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsAbstract
1017 Current Loans [Abstract] Abstract tgs:CurrentLoansAbstract
1018 2014 Notes Concept (Monetary) As Of Credit tgs:Current2014NoteProgram
1019 2018 Notes Interest Concept (Monetary) As Of Credit tgs:Current2018NotesInterestProgram
1020 Financial Leasing Concept (Monetary) As Of Credit ifrs-full:CurrentFinanceLeaseLiabilities
1021 Total Current loans Concept (Monetary) As Of Credit ifrs-full:ShorttermBorrowings
1022 Non Current Loans [Abstract] Abstract tgs:NonCurrentLoansAbstract
1023 2014 Notes Concept (Monetary) As Of Credit tgs:NonCurrent2014NoteProgram
1024 2018 Notes Interest Concept (Monetary) As Of Credit tgs:NonCurrent2014NoteInterestProgram
1025 Financial Leasing Concept (Monetary) As Of Credit ifrs-full:NoncurrentFinanceLeaseLiabilities
1026 Total non current loans Concept (Monetary) As Of Credit ifrs-full:LongtermBorrowings
1027 Total Concept (Monetary) As Of Credit ifrs-full:Borrowings
1028 Issuance expenses Concept (Monetary) For Period ifrs-full:BorrowingCostsIncurred
1029 091302 - Disclosure - LOANS, Activity of Loans (Details) Network

*

*

 http://tgs.com.ar./role/LoansActivityOfLoansDetails
1030 Implied Table Table

*

*

 implied:Table
1031 LOANS [Abstract] Abstract ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsAbstract
1032 Activity of Loans [Abstract] Abstract tgs:ReconciliationOfChangesInBorrowingsRollForward
1033 Beginning balance Concept (Monetary) As Of Credit ifrs-full:Borrowings
1034 Inflation adjustment restatement Concept (Monetary) For Period Credit tgs:BorrowingsInflationRateAdjustment
1035 Accrued interest Concept (Monetary) For Period Debit ifrs-full:InterestExpenseOnBorrowings
1036 Effect of foreign exchange rate change Concept (Monetary) For Period Debit tgs:EffectOfForeignExchangeRateChangeOnBorrowings
1037 VAT unpaid installments Concept (Monetary) For Period Debit tgs:VATUnpaidInstallmentsOnBorrowings
1038 Proceeds from loans Concept (Monetary) For Period Debit ifrs-full:ProceedsFromNoncurrentBorrowings
1039 Payment of loans Concept (Monetary) For Period Credit tgs:RepaymentsOfBorrowingsPrincipal
1040 Payment of redemption of loans Concept (Monetary) For Period Credit tgs:RepaymentsOfBorrowingsSettlementAmount
1041 Interest paid Concept (Monetary) For Period Credit ifrs-full:InterestPaidClassifiedAsFinancingActivities
1042 Ending balance Concept (Monetary) As Of Credit ifrs-full:Borrowings
1043 Amount cancelled through offsetting of principal payments maintained with creditor Concept (Monetary) For Period Debit tgs:CancellationByOffsettingOfPrincipalPaymentsMaintainedWithCreditor
1044 Amount cancelled through offsetting of interest paid maintained with creditor Concept (Monetary) For Period Debit tgs:CancellationByOffsettingOfInterestPaidMaintainedWithCreditor
1045 091304 - Disclosure - LOANS, Maturities of Current and Non-current Loans (Details) Network

*

*

 http://tgs.com.ar./role/LoansMaturitiesOfCurrentAndNoncurrentLoansDetails
1046 Disclosure of detailed information about borrowings [table] Table

*

*

 ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsTable
1047 Maturity [axis] Axis ifrs-full:MaturityAxis
1048 Aggregated time bands [member] Member ifrs-full:AggregatedTimeBandsMember
1049 Less than 1 year [Member] Member ifrs-full:NotLaterThanOneYearMember
1050 From 01/01/2020 to 12/31/2020 [Member] Member ifrs-full:LaterThanOneYearAndNotLaterThanTwoYearsMember
1051 From 01/01/2021 to 12/31/2021 [Member] Member ifrs-full:LaterThanTwoYearsAndNotLaterThanThreeYearsMember
1052 From 1/01/2022 onwards [Member] Member ifrs-full:LaterThanThreeYearsAndNotLaterThanFourYearsMember
1053 Disclosure of detailed information about borrowings [line items] LineItems ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsLineItems
1054 Maturities of current and non-current loans [Abstract] Abstract tgs:MaturitiesOfCurrentAndNonCurrentLoansExcludingIssuanceCostAbstract
1055 Current and non-current loans excluding issuance cost Concept (Monetary) As Of Credit tgs:BorrowingsNetOfIssuanceCost
1056 091306 - Disclosure - LOANS, Maturities of Finance Leases and Future Minimum Lease Payments (Details) Network

*

*

 http://tgs.com.ar./role/LoansMaturitiesOfFinanceLeasesAndFutureMinimumLeasePaymentsDetails
1057 Disclosure of detailed information about borrowings [table] Table

*

*

 ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsTable
1058 Maturity [axis] Axis ifrs-full:MaturityAxis
1059 Aggregated time bands [member] Member ifrs-full:AggregatedTimeBandsMember
1060 As of 12/31/2018 [Member] Member tgs:AsOfCurrentReportingPeriodMember
1061 From 1/01/2019 to 12/31/2019 [Member] Member ifrs-full:NotLaterThanOneYearMember
1062 From 01/01/2020 to 12/31/2020 [Member] Member ifrs-full:LaterThanOneYearAndNotLaterThanTwoYearsMember
1063 From 01/01/2021 to 12/31/2021 [Member] Member ifrs-full:LaterThanTwoYearsAndNotLaterThanThreeYearsMember
1064 From 1/01/2022 to 12/31/2022 [Member] Member ifrs-full:LaterThanThreeYearsAndNotLaterThanFourYearsMember
1065 From 1/01/2023 onwards [Member] Member ifrs-full:LaterThanFiveYearsMember
1066 Disclosure of detailed information about borrowings [line items] LineItems ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsLineItems
1067 Disclosure of maturities of finance leases and future minimum lease payments [Abstract] Abstract tgs:DisclosureOfMaturitiesOfFinanceLeasesAndFutureMinimumLeasePaymentsAbstract
1068 Total minimum future payments Concept (Monetary) As Of Credit ifrs-full:MinimumFinanceLeasePaymentsPayable
1069 Future financial charges on financial leases Concept (Monetary) As Of Credit ifrs-full:FutureFinanceChargeOnFinanceLease
1070 Book value financial leases Concept (Monetary) As Of Credit ifrs-full:MinimumFinanceLeasePaymentsPayableAtPresentValue
1071 091308 - Disclosure - LOANS, 2014 and 2018 Notes (Details) Network

*

*

 http://tgs.com.ar./role/Loans2014And2018NotesDetails
1072 Disclosure of detailed information about borrowings [table] Table

*

*

 ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsTable
1073 Borrowings by name [axis] Axis ifrs-full:BorrowingsByNameAxis
1074 Borrowings by name [member] Member ifrs-full:BorrowingsByNameMember
1075 2014 EMTN Program [Member] Member tgs:Two014EuroMediumTermNoteProgramMember
1076 2014 Note [Member] Member tgs:Two014NoteMember
1077 2018 Note [Member] Member tgs:Two018NoteMember
1078 Range [Axis] Axis ifrs-full:RangeAxis
1079 Ranges [member] Member ifrs-full:RangesMember
1080 Top of Range [Member] Member ifrs-full:TopOfRangeMember
1081 Types of interest rates [axis] Axis ifrs-full:TypesOfInterestRatesAxis
1082 Interest rate types [member] Member ifrs-full:InterestRateTypesMember
1083 Fixed Interest Rate [Member] Member ifrs-full:FixedInterestRateMember
1084 May 14, 2014 [Member] Member tgs:ScheduledPaymentDateOneMember
1085 May 14, 2018 [Member] Member tgs:ScheduledPaymentDateTwoMember
1086 May 14, 2019 [Member] Member tgs:ScheduledPaymentDateThreeMember
1087 May 14, 2020 [Member] Member tgs:ScheduledPaymentDateFourMember
1088 May 2, 2025 [Member] Member tgs:ScheduledPaymentDateFiveMember
1089 Disclosure of detailed information about borrowings [line items] LineItems ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsLineItems
1090 Issuance of notes [Abstract] Abstract tgs:IssuanceOfNotesAbstract
1091 Maximum principal amount Concept (Monetary) As Of Credit tgs:EuroMediumTermNoteMaximumBorrowingCapacity
1092 Principal amount Concept (Monetary) As Of ifrs-full:NotionalAmount
1093 Interest rate Concept (Percent) As Of ifrs-full:BorrowingsInterestRate
1094 Issuance price Concept (Percent) As Of tgs:BorrowingsPresentValueOfFaceAmountPercentage
1095 Percentage of original principal amount Concept (Percent) As Of tgs:RepaymentOfBorrowingsOnOriginalPrincipalAmountPercentage
1096 Frequency of interest payment Concept (Text/String) For Period tgs:DescriptionOfFrequencyOfInterestPayment
1097 Guarantor Concept (Text/String) For Period tgs:DescriptionOfTheGuarantorForBorrowings
1098 Percentage of cash flows discounted at an effective rate Concept (Percent) As Of ifrs-full:DescriptionOfDiscountRatesAppliedToCashFlowProjections
1099 Repurchase of note Concept (Monetary) For Period Credit tgs:RepaymentsOfBorrowingsPrincipal
1100 Cancellation and redemption of note Concept (Monetary) For Period Credit tgs:RepaymentsOfBorrowingsSettlementAmount
1101 091310 - Disclosure - LOANS, Covenants and Financial leasing (Details) Network

*

*

 http://tgs.com.ar./role/LoansCovenantsAndFinancialLeasingDetails
1102 Disclosure of detailed information about borrowings [table] Table

*

*

 ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsTable
1103 Consolidated structured entities [axis] Axis ifrs-full:ConsolidatedStructuredEntitiesAxis
1104 Entity's total for consolidated structured entities [member] Member ifrs-full:EntitysTotalForConsolidatedStructuredEntitiesMember
1105 Pampa Energia [Member] Member tgs:PampaEnergiaSAMember
1106 Range [Axis] Axis ifrs-full:RangeAxis
1107 Ranges [member] Member ifrs-full:RangesMember
1108 Bottom of Range [Member] Member ifrs-full:BottomOfRangeMember
1109 Top of Range [Member] Member ifrs-full:TopOfRangeMember
1110 Disclosure of detailed information about borrowings [line items] LineItems ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsLineItems
1111 Covenants [Abstract] Abstract tgs:CovenantsAbstract
1112 Consolidated coverage ratio Concept (Pure) For Period tgs:ConsolidatedCoverageRatio
1113 Consolidated debt ratio Concept (Pure) For Period tgs:ConsolidatedDebtRatio
1114 Financial Leasing [Abstract] Abstract tgs:FinancialLeasingAbstract
1115 Number of monthly installments Concept (Integer) For Period tgs:FinanceLeaseNumberOfInstallments
1116 Monthly payment amount Concept (Monetary) For Period Debit tgs:FinanceLeasePeriodicPaymentAmount
1117 Period of option to purchase financial leasing agreement for same amount Concept (xbrli:durationItemType) For Period tgs:PeriodOfOptionToPurchaseFinancialLeasingAgreementForSameAmount
1118 091400 - Disclosure - INCOME TAX AND DEFERRED TAX (Details) Network

*

*

 http://tgs.com.ar./role/IncomeTaxAndDeferredTaxDetails
1119 Disclosure of tax reform [Table] Table

*

*

 tgs:DisclosureOfTaxReformTable
1120 Maturity [axis] Axis ifrs-full:MaturityAxis
1121 Aggregated time bands [member] Member ifrs-full:AggregatedTimeBandsMember
1122 2018 [Member] Member tgs:YearOneMember
1123 2019 [Member] Member tgs:YearTwoMember
1124 2020 and Onwards [Member] Member tgs:YearThreeMember
1125 Range [Axis] Axis ifrs-full:RangeAxis
1126 Ranges [member] Member ifrs-full:RangesMember
1127 Bottom of Range [Member] Member ifrs-full:BottomOfRangeMember
1128 Top of Range [Member] Member ifrs-full:TopOfRangeMember
1129 Disclosure of tax reform [Line Items] LineItems tgs:DisclosureOfTaxReformLineItems
1130 Reduction in the applicable rate [Abstract] Abstract tgs:ReductionInTheApplicableRateAbstract
1131 Income tax rate Concept (Percent) For Period ifrs-full:ApplicableTaxRate
1132 Additional tax depending on dividends distributed at the rate of 30% Concept (Percent) For Period tgs:AdditionalTaxComplementedByApplicationOfTaxOnDistributionOfDividendsConditionOne
1133 Additional tax depending on dividends distributed at the rate of 25% Concept (Percent) For Period tgs:AdditionalTaxComplementedByApplicationOfTaxOnDistributionOfDividendsConditionTwo
1134 Tax Adjustment For Inflation [Abstract] Abstract tgs:TaxAdjustmentForInflationAbstract
1135 Adjustment for tax inflation Concept (Percent) For Period tgs:PercentageOfTaxAdjustmentForInflation
1136 Tax Revaluation [Abstract] Abstract tgs:TaxRevaluationAbstract
1137 Special tax, percentage Concept (Percent) For Period tgs:SpecialTaxInCaseOfTaxRevaluationPercentage
1138 One-time payment for option used Concept (Monetary) For Period Credit tgs:PaymentOfRevaluationTax
1139 Number of consecutive monthly installments Concept (Integer) For Period tgs:NumberOfConsecutiveMonthlyInstallments
1140 091402 - Disclosure - INCOME TAX AND DEFERRED TAX, Income Tax (Expense)/Gain (Details) Network

*

*

 http://tgs.com.ar./role/IncomeTaxAndDeferredTaxIncomeTaxExpenseGainDetails
1141 Implied Table Table

*

*

 implied:Table
1142 INCOME TAX AND DEFERRED TAX [Abstract] Abstract ifrs-full:MajorComponentsOfTaxExpenseIncomeAbstract
1143 Current income tax Concept (Monetary) For Period Debit ifrs-full:CurrentTaxExpenseIncome
1144 Special revaluation tax Concept (Monetary) For Period Debit tgs:SpecialRevaluationTaxExpense
1145 Deferred income tax Concept (Monetary) For Period Debit ifrs-full:DeferredTaxExpenseIncome
1146 Income tax (expense) / gain Concept (Monetary) For Period Debit ifrs-full:IncomeTaxExpenseContinuingOperations
1147 091404 - Disclosure - INCOME TAX AND DEFERRED TAX, Analysis of Deferred Tax Assets and Liabilities (Details) Network

*

*

 http://tgs.com.ar./role/IncomeTaxAndDeferredTaxAnalysisOfDeferredTaxAssetsAndLiabilitiesDetails
1148 Implied Table Table

*

*

 implied:Table
1149 INCOME TAX AND DEFERRED TAX [Abstract] Abstract ifrs-full:MajorComponentsOfTaxExpenseIncomeAbstract
1150 Analysis of net deferred tax assets and liabilities [abstract] Abstract ifrs-full:NetDeferredTaxAssetsAndLiabilitiesAbstract
1151 Deferred tax assets [Abstract] Abstract tgs:DeferredIncomeTaxAssetsAbstract
1152 Deferred tax assets to be recovered after more than 12 months Concept (Monetary) As Of Debit tgs:DeferredIncomeTaxAssetsNoncurrent
1153 Deferred tax assets to be recovered after less than 12 months Concept (Monetary) As Of Debit tgs:DeferredIncomeTaxAssetsCurrent
1154 Deferred tax liabilities [Abstract] Abstract tgs:DeferredIncomeTaxLiabilitiesAbstract
1155 Deferred tax liabilities to be recovered after more than 12 months Concept (Monetary) As Of Credit tgs:DeferredIncomeTaxLiabilitiesNoncurrent
1156 Deferred tax liabilities to be recovered after less than 12 months Concept (Monetary) As Of Credit tgs:DeferredIncomeTaxLiabilitiesCurrent
1157 Deferred tax liabilities, net Concept (Monetary) As Of Credit ifrs-full:DeferredTaxLiabilityAsset
1158 091406 - Disclosure - INCOME TAX AND DEFERRED TAX, Component of Net Deferred Tax Assets and Liabilities (Details) Network

*

*

 http://tgs.com.ar./role/IncomeTaxAndDeferredTaxComponentOfNetDeferredTaxAssetsAndLiabilitiesDetails
1159 Disclosure of temporary difference, unused tax losses and unused tax credits [table] Table

*

*

 ifrs-full:DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsTable
1160 Assets and liabilities [axis] Axis ifrs-full:AssetsAndLiabilitiesAxis
1161 Assets and liabilities [member] Member ifrs-full:AssetsAndLiabilitiesMember
1162 Deferred Tax Assets [Member] Member tgs:DeferredTaxAssetsMember
1163 Deferred Tax Liabilities [Member] Member tgs:DeferredTaxLiabilitiesMember
1164 Temporary difference, unused tax losses and unused tax credits [axis] Axis ifrs-full:TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis
1165 Temporary difference, unused tax losses and unused tax credits [member] Member ifrs-full:TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember
1166 Allowance for Doubtful Accounts [Member] Member tgs:AllowanceForDoubtfulAccountMember
1167 Tax Credits Discounted Value Loss [Member] Member tgs:TaxCreditsDiscountedValueLossMember
1168 Account Receivables Discounted Value [Member] Member tgs:AccountReceivablesDiscountedValueMember
1169 Provisions for Legal Claims and Other Provisions [Member] Member tgs:ProvisionsForLegalClaimsAndOtherProvisionsMember
1170 Financial Lease [Member] Member tgs:FinancialLeaseMember
1171 Contract liabilities [Member] Member tgs:ContractLiabilitiesMember
1172 Deferred Sales [Member] Member tgs:DeferredSalesMember
1173 Loans [Member] Member tgs:LoanMember
1174 Property, Plant and Equipment [Member] Member tgs:PropertyPlantAndEquipmentsMember
1175 Cash and Cash Equivalents [Member] Member tgs:CashAndCashEquivalentMember
1176 Inventories [Member] Member tgs:InventoryMember
1177 Disclosure of temporary difference, unused tax losses and unused tax credits [line items] LineItems ifrs-full:DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems
1178 Components of Net Deferred Tax Assets and Liabilities [abstract] Abstract ifrs-full:ReconciliationOfChangesInDeferredTaxLiabilityAssetAbstract
1179 Deferred tax assets (liability), beginning of year Concept (Monetary) As Of Credit ifrs-full:DeferredTaxLiabilityAsset
1180 Charge in results Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseInDeferredTaxLiabilityAsset
1181 Deferred tax assets (liability), end of year Concept (Monetary) As Of Credit ifrs-full:DeferredTaxLiabilityAsset
1182 091408 - Disclosure - INCOME TAX AND DEFERRED TAX, Effective Income Tax Rate Reconciliation (Details) Network

*

*

 http://tgs.com.ar./role/IncomeTaxAndDeferredTaxEffectiveIncomeTaxRateReconciliationDetails
1183 Implied Table Table

*

*

 implied:Table
1184 INCOME TAX AND DEFERRED TAX [Abstract] Abstract ifrs-full:MajorComponentsOfTaxExpenseIncomeAbstract
1185 Effective Income Tax Rate Reconciliation [abstract] Abstract ifrs-full:ReconciliationOfAccountingProfitMultipliedByApplicableTaxRatesAbstract
1186 Pre-tax income Concept (Monetary) For Period Credit ifrs-full:ProfitLossBeforeTax
1187 Statutory income tax rate Concept (Percent) For Period ifrs-full:ApplicableTaxRate
1188 Pre-tax income at statutory income tax rate Concept (Monetary) For Period Debit ifrs-full:TaxExpenseIncomeAtApplicableTaxRate
1189 Tax Effects Due to [Abstract] Abstract tgs:TaxEffectsDueToAbstract
1190 Inflation effect Concept (Monetary) For Period Debit tgs:TaxEffectFromNetMonetaryResult
1191 Special revaluation tax Concept (Monetary) For Period Debit tgs:SpecialRevaluationTaxExpense
1192 Change in the tax rate Concept (Monetary) For Period Debit ifrs-full:TaxEffectFromChangeInTaxRate
1193 Non-taxable income or non-deductible expenses Concept (Monetary) For Period Debit tgs:TaxEffectOfExpenseNotDeductibleInDeterminingTaxableProfitTaxLossAndRevenuesExemptFromTaxation
1194 Others Concept (Monetary) For Period Debit ifrs-full:OtherTaxEffectsForReconciliationBetweenAccountingProfitAndTaxExpenseIncome
1195 Income tax (expense) / gain Concept (Monetary) For Period Debit ifrs-full:IncomeTaxExpenseContinuingOperations
1196 091500 - Disclosure - PROVISIONS (Details) Network

*

*

 http://tgs.com.ar./role/ProvisionsDetails
1197 Disclosure of other provisions [table] Table

*

*

 ifrs-full:DisclosureOfOtherProvisionsTable
1198 Classes of other provisions [axis] Axis ifrs-full:ClassesOfProvisionsAxis
1199 Other provisions [member] Member ifrs-full:OtherProvisionsMember
1200 Legal Claims and Others [Member] Member tgs:LegalClaimsAndOthersMember
1201 Other Operating Expenses [Member] Member tgs:OtherOperatingExpensesMember
1202 Financial Expenses [Member] Member tgs:FinancialExpensesMember
1203 Disclosure of other provisions [line items] LineItems ifrs-full:DisclosureOfOtherProvisionsLineItems
1204 Reconciliation of changes in other provisions [abstract] Abstract ifrs-full:ReconciliationOfChangesInOtherProvisionsAbstract
1205 Beginning balance Concept (Monetary) As Of Credit ifrs-full:OtherProvisions
1206 Inflation adjustment restatement Concept (Monetary) For Period Credit tgs:ProvisionsInflationRateAdjustment
1207 Additions Concept (Monetary) For Period Credit ifrs-full:AdditionalProvisionsOtherProvisions
1208 Uses Concept (Monetary) For Period Debit ifrs-full:ProvisionUsedOtherProvisions
1209 Reversals Concept (Monetary) For Period Debit ifrs-full:UnusedProvisionReversedOtherProvisions
1210 Ending balance Concept (Monetary) As Of Credit ifrs-full:OtherProvisions
1211 091600 - Disclosure - FINANCIAL RISK MANAGEMENT, Foreign Exchange Risk (Details) Network

*

*

 http://tgs.com.ar./role/FinancialRiskManagementForeignExchangeRiskDetails
1212 Disclosure of nature and extent of risks arising from financial instruments [table] Table

*

*

 ifrs-full:DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsTable
1213 Currency [Axis] Axis srt:CurrencyAxis
1214 All Currencies [Domain] Member currency:AllCurrenciesDomain
1215 U.S. Dollars [Member] Member currency:USD
1216 Argentine Pesos [Member] Member currency:ARS
1217 Segments [axis] Axis ifrs-full:SegmentsAxis
1218 Segments [member] Member ifrs-full:SegmentsMember
1219 Liquids Production and Commercialization [Member] Member tgs:ProductionAndCommercializationOfLiquidsMember
1220 Types of risks [axis] Axis ifrs-full:TypesOfRisksAxis
1221 Risks [member] Member ifrs-full:TypesOfRisksMember
1222 Foreign Exchange Risk [Member] Member ifrs-full:CurrencyRiskMember
1223 Disclosure of risk management strategy related to hedge accounting [line items] LineItems ifrs-full:DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsLineItems
1224 Foreign exchange risk [Abstract] Abstract tgs:ForeignExchangeRiskAbstract
1225 Percentage of revenue Concept (Percent) For Period ifrs-full:PercentageOfEntitysRevenue
1226 Percentage of funds denominated in US dollars to mitigate foreign exchange risk Concept (Percent) As Of tgs:PercentageOfFundsDenominatedInUSDollars
1227 Percentage appreciation (depreciation) of US Dollar against Argentine Peso Concept (Percent) For Period tgs:PercentageAppreciationDepreciationRateOfUSDollarAgainstArgentinePeso
1228 Net assets / liabilities position [Abstract] Abstract ifrs-full:NetAssetsLiabilitiesAbstract
1229 Assets Concept (Monetary) As Of Debit ifrs-full:Assets
1230 Liabilities Concept (Monetary) As Of Credit ifrs-full:Liabilities
1231 Net assets/ liabilities position Concept (Monetary) As Of Debit ifrs-full:NetAssetsLiabilities
1232 Effect on financial results [Abstract] Abstract tgs:DecreaseInProfitLossBeforeTaxAbstract
1233 Effect on financial results Concept (Monetary) For Period Debit tgs:DecreaseInProfitLossBeforeTax
1234 091602 - Disclosure - FINANCIAL RISK MANAGEMENT, Interest Rate Risk (Details) Network

*

*

 http://tgs.com.ar./role/FinancialRiskManagementInterestRateRiskDetails
1235 Disclosure of nature and extent of risks arising from financial instruments [table] Table

*

*

 ifrs-full:DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsTable
1236 Types of risks [axis] Axis ifrs-full:TypesOfRisksAxis
1237 Risks [member] Member ifrs-full:TypesOfRisksMember
1238 Interest Rate Risk [Member] Member ifrs-full:InterestRateRiskMember
1239 Types of interest rates [axis] Axis ifrs-full:TypesOfInterestRatesAxis
1240 Interest rate types [member] Member ifrs-full:InterestRateTypesMember
1241 Fixed Interest Rate [Member] Member ifrs-full:FixedInterestRateMember
1242 Variable Interest Rate [Member] Member ifrs-full:FloatingInterestRateMember
1243 CER [Member] Member tgs:ConstantExchangeRateMember
1244 Disclosure of nature and extent of risks arising from financial instruments [line items] LineItems ifrs-full:DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsLineItems
1245 Interest Rate Risk [abstract] Abstract ifrs-full:DisclosureOfFinancialInstrumentsByTypeOfInterestRateAbstract
1246 Percentage of outstanding financial indebtedness bearing fixed interest rate Concept (Percent) For Period tgs:PercentageOfFinancialIndebtednessBearingFixedInterestRate
1247 Financial Assets and Financial Liabilities [Abstract] Abstract tgs:DisclosureOfFinancialAssetsAndFinancialLiabilitiesAbstract
1248 Financial assets Concept (Monetary) As Of Debit ifrs-full:FinancialAssets
1249 Financial liabilities Concept (Monetary) As Of Credit ifrs-full:FinancialLiabilities
1250 Trade receivables Concept (Monetary) As Of Debit ifrs-full:TradeReceivables
1251 Spread on variable interest rate Concept (Percent) As Of ifrs-full:BorrowingsAdjustmentToInterestRateBasis
1252 Decrease in variable rate basis Concept (Pure) For Period tgs:DecreaseInVariableRateBasis
1253 091604 - Disclosure - FINANCIAL RISK MANAGEMENT, Commodity Price Risk (Details) Network

*

*

 http://tgs.com.ar./role/FinancialRiskManagementCommodityPriceRiskDetails
1254 Disclosure of nature and extent of risks arising from financial instruments [table] Table

*

*

 ifrs-full:DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsTable
1255 Types of risks [axis] Axis ifrs-full:TypesOfRisksAxis
1256 Risks [member] Member ifrs-full:TypesOfRisksMember
1257 Commodity Price Risk [Member] Member ifrs-full:CommodityPriceRiskMember
1258 Segments [axis] Axis ifrs-full:SegmentsAxis
1259 Segments [member] Member ifrs-full:SegmentsMember
1260 Liquids Production and Commercialization [Member] Member tgs:ProductionAndCommercializationOfLiquidsMember
1261 Classes of property, plant and equipment [axis] Axis ifrs-full:ClassesOfPropertyPlantAndEquipmentAxis
1262 Property, plant and equipment [member] Member ifrs-full:PropertyPlantAndEquipmentMember
1263 Oil and gas assets [member] Member ifrs-full:OilAndGasAssetsMember
1264 Propane [Member] Member tgs:PropaneMember
1265 Butane [Member] Member tgs:ButaneMember
1266 Natural Gasoline [Member] Member tgs:NaturalGasolineMember
1267 Maturity [axis] Axis ifrs-full:MaturityAxis
1268 Aggregated time bands [member] Member ifrs-full:AggregatedTimeBandsMember
1269 October 2018 - April 2019 [Member] Member tgs:AgreementPeriodOneMember
1270 May 2019 - September 2019 [Member] Member tgs:AgreementPeriodTwoMember
1271 October 2019 [Member] Member tgs:AgreementPeriodThreeMember
1272 November 2019 - April 2020 [Member] Member tgs:AgreementPeriodFourMember
1273 Disclosure of nature and extent of risks arising from financial instruments [line items] LineItems ifrs-full:DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsLineItems
1274 Commodity Rate Risk [Abstract] Abstract tgs:DisclosureOfFinancialInstrumentsByTypeOfCommodityRateAbstract
1275 Percentage of sales of propane and butane in domestic market Concept (Percent) For Period tgs:PercentageOfSalesOfPropaneAndButaneInDomesticMarket
1276 Increase (decrease) in international price of LPG and natural gasoline Concept (Per Unit) For Period tgs:IncreaseDecreaseInInternationalPriceOfLiquidPetroleumGasAndNaturalGasoline
1277 Decrease in net comprehensive income due to commodity risk Concept (Monetary) For Period Debit tgs:DecreaseInNetComprehensiveIncomeDueToCommodityRisk
1278 Monthly Short Tons [Abstract] Abstract tgs:MonthlyShortTonsAbstract
1279 Monthly short tons Concept (Integer) For Period tgs:ShortTons
1280 Premium paid Concept (Monetary) As Of Debit ifrs-full:FinancialAssetsAtFairValueThroughProfitOrLoss
1281 Derivative financial instruments Concept (Monetary) As Of Debit ifrs-full:CurrentDerivativeFinancialAssets
1282 091606 - Disclosure - FINANCIAL RISK MANAGEMENT, Credit Risk, Trade and Other Receivables (Details) Network

*

*

 http://tgs.com.ar./role/FinancialRiskManagementCreditRiskTradeAndOtherReceivablesDetails
1283 Disclosure of nature and extent of risks arising from financial instruments [table] Table

*

*

 ifrs-full:DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsTable
1284 Segments [axis] Axis ifrs-full:SegmentsAxis
1285 Segments [member] Member ifrs-full:SegmentsMember
1286 Natural Gas Transportation [Member] Member tgs:NaturalGasTransportationMember
1287 Liquids Production and Commercialization [Member] Member tgs:ProductionAndCommercializationOfLiquidsMember
1288 Major customers [axis] Axis ifrs-full:MajorCustomersAxis
1289 Customers [member] Member ifrs-full:MajorCustomersMember
1290 MetroGas [Member] Member tgs:MetroGasMember
1291 Camuzzi Gas Pampeana S.A. [Member] Member tgs:CamuzziGasPampeanaSAMember
1292 Naturgy Argentina [Member] Member tgs:NaturgyArgentinaMember
1293 CAMMESA [Member] Member tgs:CAMMESAMember
1294 Pampa Energia [Member] Member tgs:PampaEnergiaSAMember
1295 Camuzzi Gas del Sur S.A. [Member] Member tgs:CamuzziGasDelSurSAMember
1296 PBB Polisur [Member] Member tgs:PBBPolisurMember
1297 Petredec [Member] Member tgs:PetredecMember
1298 Geogas Trading S.A. [Member] Member tgs:GeogasTradingSAMember
1299 Shell Trading (US) Company [Member] Member tgs:ShellTradingUSCompanyMember
1300 Petrobras Global Trading BV [Member] Member tgs:PetrobrasGlobalTradingBVMember
1301 Petroleo Brasileiro [Member] Member tgs:PetroleoBrasileiroMember
1302 Braskem Netherlands B.V. [Member] Member tgs:BraskemNetherlandsBVMember
1303 Disclosure of nature and extent of risks arising from financial instruments [line items] LineItems ifrs-full:DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsLineItems
1304 Trade and other receivables [abstract] Abstract ifrs-full:TradeAndOtherReceivablesAbstract
1305 Current trade receivables Concept (Monetary) As Of Debit tgs:CurrentTradeReceivablesGross
1306 Non-current trade receivables Concept (Monetary) As Of Debit ifrs-full:NoncurrentTradeReceivables
1307 Allowances for doubtful accounts Concept (Monetary) As Of Credit ifrs-full:AllowanceAccountForCreditLossesOfFinancialAssets
1308 Revenues Concept (Monetary) For Period Credit ifrs-full:Revenue
1309 Trade receivables Concept (Monetary) As Of Debit ifrs-full:TradeReceivables
1310 091610 - Disclosure - FINANCIAL RISK MANAGEMENT, Credit Risk, Cash and Financial Placement Maturities (Details) Network

*

*

 http://tgs.com.ar./role/FinancialRiskManagementCreditRiskCashAndFinancialPlacementMaturitiesDetails
1311 Disclosure of financial assets [table] Table

*

*

 ifrs-full:DisclosureOfFinancialAssetsTable
1312 Past due status [axis] Axis ifrs-full:PastDueStatusAxis
1313 Past due status [member] Member ifrs-full:PastDueStatusMember
1314 Without Specified Maturity [Member] Member tgs:WithoutSpecifiedMaturityMember
1315 With Specified Maturity Over Due [Member] Member tgs:WithSpecifiedMaturityOverDueMember
1316 With Specified Maturity Non-Due [Member] Member tgs:WithSpecifiedMaturityNonDueMember
1317 With Specified Maturity [Member] Member tgs:WithSpecifiedMaturityMember
1318 Maturity [axis] Axis ifrs-full:MaturityAxis
1319 Aggregated time bands [member] Member ifrs-full:AggregatedTimeBandsMember
1320 Until 12-31-2017 [Member] Member tgs:MaturitiesPriorYear2017Member
1321 From 01-01-18 to 03-31-18 [Member] Member tgs:MaturityCurrentYear2018PeriodOneMember
1322 From 04-01-18 to 06-30-18 [Member] Member tgs:MaturityCurrentYear2018PeriodTwoMember
1323 From 07-01-18 to 09-30-18 [Member] Member tgs:MaturityCurrentYear2018PeriodThreeMember
1324 From 10-01-18 to 12-31-18 [Member] Member tgs:MaturityCurrentYear2018PeriodFourMember
1325 From 01-01-19 to 03-31-19 [Member] Member tgs:MaturityNextYear2019PeriodOneMember
1326 From 04-01-19 to 06-30-19 [Member] Member tgs:MaturityNextYear2019PeriodTwoMember
1327 From 07-01-19 to 09-30-19 [Member] Member tgs:MaturityNextYear2019PeriodThreeMember
1328 From 10-01-19 to 12-31-19 [Member] Member tgs:MaturityNextYear2019PeriodFourMember
1329 Until 12-31-2016 [Member] Member tgs:MaturitiesPriorYear2016Member
1330 From 01-01-17 to 03-31-17 [Member] Member tgs:MaturityCurrentYear2017PeriodOneMember
1331 From 04-01-17 to 06-30-17 [Member] Member tgs:MaturityCurrentYear2017PeriodTwoMember
1332 From 07-01-17 to 09-30-17 [Member] Member tgs:MaturityCurrentYear2017PeriodThreeMember
1333 From 10-01-17 to 12-31-17 [Member] Member tgs:MaturityCurrentYear2017PeriodFourMember
1334 From 01-01-18 to 03-31-18 [Member] Member tgs:MaturityNextYear2018PeriodOneMember
1335 From 04-01-18 to 06-30-18 [Member] Member tgs:MaturityNextYear2018PeriodTwoMember
1336 From 07-01-18 to 09-30-18 [Member] Member tgs:MaturityNextYear2018PeriodThreeMember
1337 From 10-01-18 to 12-31-18 [Member] Member tgs:MaturityNextYear2018PeriodFourMember
1338 During 2020 [Member] Member ifrs-full:LaterThanOneYearAndNotLaterThanTwoYearsMember
1339 During 2021 [Member] Member ifrs-full:LaterThanTwoYearsAndNotLaterThanThreeYearsMember
1340 During 2022 [Member] Member ifrs-full:LaterThanThreeYearsAndNotLaterThanFourYearsMember
1341 During 2023 [Member] Member ifrs-full:LaterThanFourYearsAndNotLaterThanFiveYearsMember
1342 From 2024 onwards [Member] Member ifrs-full:LaterThanFiveYearsMember
1343 During 2019 [Member] Member tgs:LaterThanOneYearAndNotLaterThanTwoYears2017Member
1344 During 2020 [Member] Member tgs:LaterThanTwoYearsAndNotLaterThanThreeYears2017Member
1345 During 2021 [Member] Member tgs:LaterThanThreeYearsAndNotLaterThanFourYears2017Member
1346 During 2022 [Member] Member tgs:LaterThanFourYearsAndNotLaterThanFiveYears2017Member
1347 From 2023 onwards [Member] Member tgs:LaterThanFiveYears2017Member
1348 Disclosure of financial assets [line items] LineItems ifrs-full:DisclosureOfFinancialAssetsLineItems
1349 Maturities of financial assets [Abstract] Abstract tgs:MaturitiesOfFinancialAssetsAbstract
1350 Cash and cash equivalents Concept (Monetary) As Of Debit ifrs-full:CashAndCashEquivalents
1351 Other financial assets Concept (Monetary) As Of Debit ifrs-full:OtherFinancialAssets
1352 Receivables Concept (Monetary) As Of Debit ifrs-full:TradeAndOtherReceivables
1353 091612 - Disclosure - FINANCIAL RISK MANAGEMENT, Liquidity Risk (Details) Network

*

*

 http://tgs.com.ar./role/FinancialRiskManagementLiquidityRiskDetails
1354 Disclosure of financial liabilities [table] Table

*

*

 ifrs-full:DisclosureOfFinancialLiabilitiesTable
1355 Types of risks [axis] Axis ifrs-full:TypesOfRisksAxis
1356 Risks [member] Member ifrs-full:TypesOfRisksMember
1357 Liquidity Risk [Member] Member ifrs-full:LiquidityRiskMember
1358 Past due status [axis] Axis ifrs-full:PastDueStatusAxis
1359 Past due status [member] Member ifrs-full:PastDueStatusMember
1360 Without Specified Maturity [Member] Member tgs:WithoutSpecifiedMaturityMember
1361 With Specified Maturity Over Due [Member] Member tgs:WithSpecifiedMaturityOverDueMember
1362 With Specified Maturity Non-Due [Member] Member tgs:WithSpecifiedMaturityNonDueMember
1363 With Specified Maturity [Member] Member tgs:WithSpecifiedMaturityMember
1364 Maturity [axis] Axis ifrs-full:MaturityAxis
1365 Aggregated time bands [member] Member ifrs-full:AggregatedTimeBandsMember
1366 Until 12-31-2017 [Member] Member tgs:MaturitiesPriorYear2017Member
1367 From 01-01-18 to 03-31-18 [Member] Member tgs:MaturityCurrentYear2018PeriodOneMember
1368 From 04-01-18 to 06-30-18 [Member] Member tgs:MaturityCurrentYear2018PeriodTwoMember
1369 From 07-01-18 to 09-30-18 [Member] Member tgs:MaturityCurrentYear2018PeriodThreeMember
1370 From 10-01-18 to 12-31-18 [Member] Member tgs:MaturityCurrentYear2018PeriodFourMember
1371 From 01-01-19 to 03-31-19 [Member] Member tgs:MaturityNextYear2019PeriodOneMember
1372 From 04-01-19 to 06-30-19 [Member] Member tgs:MaturityNextYear2019PeriodTwoMember
1373 From 07-01-19 to 09-30-19 [Member] Member tgs:MaturityNextYear2019PeriodThreeMember
1374 From 10-01-19 to 12-31-19 [Member] Member tgs:MaturityNextYear2019PeriodFourMember
1375 Until 12-31-2016 [Member] Member tgs:MaturitiesPriorYear2016Member
1376 From 01-01-17 to 03-31-17 [Member] Member tgs:MaturityCurrentYear2017PeriodOneMember
1377 From 04-01-17 to 06-30-17 [Member] Member tgs:MaturityCurrentYear2017PeriodTwoMember
1378 From 07-01-17 to 09-30-17 [Member] Member tgs:MaturityCurrentYear2017PeriodThreeMember
1379 From 10-01-17 to 12-31-17 [Member] Member tgs:MaturityCurrentYear2017PeriodFourMember
1380 From 01-01-18 to 03-31-18 [Member] Member tgs:MaturityNextYear2018PeriodOneMember
1381 From 04-01-18 to 06-30-18 [Member] Member tgs:MaturityNextYear2018PeriodTwoMember
1382 From 07-01-18 to 09-30-18 [Member] Member tgs:MaturityNextYear2018PeriodThreeMember
1383 From 10-01-18 to 12-31-18 [Member] Member tgs:MaturityNextYear2018PeriodFourMember
1384 During 2020 [Member] Member ifrs-full:LaterThanOneYearAndNotLaterThanTwoYearsMember
1385 During 2021 [Member] Member ifrs-full:LaterThanTwoYearsAndNotLaterThanThreeYearsMember
1386 During 2022 [Member] Member ifrs-full:LaterThanThreeYearsAndNotLaterThanFourYearsMember
1387 During 2023 [Member] Member ifrs-full:LaterThanFourYearsAndNotLaterThanFiveYearsMember
1388 From 2024 onwards [Member] Member ifrs-full:LaterThanFiveYearsMember
1389 During 2019 [Member] Member tgs:LaterThanOneYearAndNotLaterThanTwoYears2017Member
1390 During 2020 [Member] Member tgs:LaterThanTwoYearsAndNotLaterThanThreeYears2017Member
1391 During 2021 [Member] Member tgs:LaterThanThreeYearsAndNotLaterThanFourYears2017Member
1392 During 2022 [Member] Member tgs:LaterThanFourYearsAndNotLaterThanFiveYears2017Member
1393 From 2023 onwards [Member] Member tgs:LaterThanFiveYears2017Member
1394 Disclosure of financial liabilities [line items] LineItems ifrs-full:DisclosureOfFinancialLiabilitiesLineItems
1395 Maturities of financial liabilities [Abstract] Abstract tgs:MaturitiesOfFinancialLiabilitiesAbstract
1396 Loans Concept (Monetary) As Of Credit ifrs-full:Borrowings
1397 Other financial liabilities Concept (Monetary) As Of Credit ifrs-full:OtherFinancialLiabilities
1398 Finance leases Concept (Monetary) As Of Credit ifrs-full:FinanceLeaseLiabilities
1399 091614 - Disclosure - FINANCIAL RISK MANAGEMENT, Capital Risk Management (Details) Network

*

*

 http://tgs.com.ar./role/FinancialRiskManagementCapitalRiskManagementDetails
1400 Implied Table Table

*

*

 implied:Table
1401 FINANCIAL RISK MANAGEMENT [Abstract] Abstract ifrs-full:DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsAbstract
1402 Total debt (Note 13) Concept (Monetary) As Of Credit ifrs-full:Borrowings
1403 Total Equity Concept (Monetary) As Of Credit ifrs-full:Equity
1404 Total Capital Concept (Monetary) As Of Credit tgs:LoanAndEquityCapital
1405 Gearing Ratio Concept (Percent) For Period tgs:GearingRatio
1406 091616 - Disclosure - FINANCIAL RISK MANAGEMENT, Financial Instrument Categories (Details) Network

*

*

 http://tgs.com.ar./role/FinancialRiskManagementFinancialInstrumentCategoriesDetails
1407 Disclosure of detailed information about financial instruments [table] Table

*

*

 ifrs-full:DisclosureOfFinancialInstrumentsTable
1408 Categories of financial assets [axis] Axis ifrs-full:CategoriesOfFinancialAssetsAxis
1409 Financial assets, category [member] Member ifrs-full:FinancialAssetsCategoryMember
1410 Financial Assets at Fair Value [Member] Member ifrs-full:FinancialAssetsAtFairValueMember
1411 Financial Assets Held to Maturity [Member] Member ifrs-full:HeldtomaturityInvestmentsCategoryMember
1412 Loans and Other Receivables [Member] Member ifrs-full:LoansAndReceivablesCategoryMember
1413 Classes of financial instruments [axis] Axis ifrs-full:ClassesOfFinancialInstrumentsAxis
1414 Financial instruments, class [member] Member ifrs-full:ClassesOfFinancialInstrumentsMember
1415 Trade Receivables [Member] Member ifrs-full:TradeReceivablesMember
1416 Other Receivables [Member] Member tgs:OtherReceivablesMember
1417 Derivative Financial Instruments [Member] Member ifrs-full:DerivativesMember
1418 Other Financial Assets at Amortized Cost [Member] Member ifrs-full:FinancialAssetsAtAmortisedCostCategoryMember
1419 Other Financial Assets at Fair Value Through Profit or Loss [Member] Member ifrs-full:FinancialAssetsAtFairValueThroughProfitOrLossCategoryMember
1420 Cash and Cash Equivalents [Member] Member tgs:CashAndCashEquivalentMember
1421 Categories of financial liabilities [axis] Axis ifrs-full:CategoriesOfFinancialLiabilitiesAxis
1422 Financial liabilities, category [member] Member ifrs-full:FinancialLiabilitiesCategoryMember
1423 Financial Liabilities at Fair Value [Member] Member ifrs-full:FinancialLiabilitiesAtFairValueMember
1424 Other Financial Liabilities [Member] Member tgs:OtherFinancialLiabilitiesMember
1425 Classes of financial liabilities [axis] Axis ifrs-full:ClassesOfFinancialLiabilitiesAxis
1426 Financial liabilities, class [member] Member ifrs-full:FinancialLiabilitiesMember
1427 Trade Payables [Member] Member tgs:TradePayablesMember
1428 Loans [Member] Member ifrs-full:ShorttermBorrowingsMember
1429 Payroll and Social Security Taxes Payables [Member] Member tgs:PayrollAndSocialSecurityTaxesPayablesMember
1430 Other Payables [Member] Member tgs:OtherPayablesMember
1431 Loans [Member] Member ifrs-full:LongtermBorrowingsMember
1432 Disclosure of detailed information about financial instruments [line items] LineItems ifrs-full:DisclosureOfFinancialInstrumentsLineItems
1433 Financial Assets [Abstract] Abstract ifrs-full:CategoriesOfFinancialAssetsAbstract
1434 CURRENT ASSETS [Abstract] Abstract ifrs-full:CategoriesOfCurrentFinancialAssetsAbstract
1435 Total current assets Concept (Monetary) As Of Debit ifrs-full:CurrentFinancialAssets
1436 NON-CURRENT ASSETS [Abstract] Abstract ifrs-full:CategoriesOfNoncurrentFinancialAssetsAbstract
1437 Total non-current assets Concept (Monetary) As Of Debit ifrs-full:NoncurrentFinancialAssets
1438 Total assets Concept (Monetary) As Of Debit ifrs-full:FinancialAssets
1439 Financial Liabilities [Abstract] Abstract ifrs-full:CategoriesOfFinancialLiabilitiesAbstract
1440 CURRENT LIABILITIES [Abstract] Abstract ifrs-full:CategoriesOfCurrentFinancialLiabilitiesAbstract
1441 Total current liabilities Concept (Monetary) As Of Credit ifrs-full:CurrentFinancialLiabilities
1442 NON-CURRENT LIABILITIES [Abstract] Abstract ifrs-full:CategoriesOfNoncurrentFinancialLiabilitiesAbstract
1443 Total non-current liabilities Concept (Monetary) As Of Credit ifrs-full:NoncurrentFinancialLiabilities
1444 Total liabilities Concept (Monetary) As Of Credit ifrs-full:FinancialLiabilities
1445 091618 - Disclosure - FINANCIAL RISK MANAGEMENT, Fair Value Measurement Hierarchy and Estimates (Details) Network

*

*

 http://tgs.com.ar./role/FinancialRiskManagementFairValueMeasurementHierarchyAndEstimatesDetails
1446 Disclosure of fair value measurement of assets [table] Table

*

*

 ifrs-full:DisclosureOfFairValueMeasurementOfAssetsTable
1447 Measurement [axis] Axis ifrs-full:MeasurementAxis
1448 Aggregated measurement [member] Member ifrs-full:AggregatedMeasurementMember
1449 Fair Value [Member] Member ifrs-full:AtFairValueMember
1450 Levels of fair value hierarchy [axis] Axis ifrs-full:LevelsOfFairValueHierarchyAxis
1451 All levels of fair value hierarchy [member] Member ifrs-full:AllLevelsOfFairValueHierarchyMember
1452 Level 1 [Member] Member ifrs-full:Level1OfFairValueHierarchyMember
1453 Level 2 [Member] Member ifrs-full:Level2OfFairValueHierarchyMember
1454 Level 3 [Member] Member ifrs-full:Level3OfFairValueHierarchyMember
1455 Borrowings by name [axis] Axis ifrs-full:BorrowingsByNameAxis
1456 Borrowings by name [member] Member ifrs-full:BorrowingsByNameMember
1457 2018 note [Member] Member tgs:Two018NoteMember
1458 Disclosure of fair value measurement of assets [line items] LineItems ifrs-full:DisclosureOfFairValueMeasurementOfAssetsLineItems
1459 Financial assets at fair value [Abstract] Abstract tgs:FinancialAssetsAtFairValueAbstract
1460 Cash and cash equivalents Concept (Monetary) As Of Debit tgs:CashAndCashEquivalentsAtFairValue
1461 Derivative financial instruments Concept (Monetary) As Of Debit ifrs-full:CurrentDerivativeFinancialAssets
1462 Other current financial assets at fair value through profit or loss Concept (Monetary) As Of Debit ifrs-full:CurrentFinancialAssetsAtFairValueThroughProfitOrLoss
1463 Total Concept (Monetary) As Of Debit ifrs-full:FinancialAssetsAtFairValue
1464 Financial liabilities at carrying amount and estimated fair value [Abstract] Abstract tgs:FinancialLiabilitiesAtCarryingAmountAndEstimatedFairValueAbstract
1465 Carrying amount Concept (Monetary) As Of Credit ifrs-full:FinancialLiabilities
1466 Fair Value Concept (Monetary) As Of Credit ifrs-full:FinancialLiabilitiesAtFairValue
1467 091700 - Disclosure - REGULATORY FRAMEWORK, General Framework of the Natural Gas Transportation Segment (Details) Network

*

*

 http://tgs.com.ar./role/RegulatoryFrameworkGeneralFrameworkOfNaturalGasTransportationSegmentDetails
1468 Disclosure of non-adjusting events after reporting period [table] Table

*

*

 ifrs-full:DisclosureOfNonadjustingEventsAfterReportingPeriodTable
1469 Non-adjusting events after reporting period [axis] Axis ifrs-full:NonadjustingEventsAfterReportingPeriodAxis
1470 Non-adjusting events after reporting period [member] Member ifrs-full:NonadjustingEventsMember
1471 Subsequent Event [Member] Member tgs:SubsequentEventsMember
1472 Disclosure of non-adjusting events after reporting period [line items] LineItems ifrs-full:DisclosureOfNonadjustingEventsAfterReportingPeriodLineItems
1473 General aspects [Abstract] Abstract tgs:GeneralAspectsAbstract
1474 Original license period Concept (xbrli:durationItemType) For Period tgs:TermOfTransportationLicenseGranted
1475 License period, renewal Concept (xbrli:durationItemType) For Period tgs:TermOfExtensionOnLicenseGranted
1476 License period, after renewal Concept (xbrli:durationItemType) For Period tgs:LicensePeriodAfterRenewal
1477 Tariff situation [Abstract] Abstract tgs:TariffSituationAbstract
1478 Natural gas transportation tariffs period, condition one Concept (Text/String) For Period tgs:NaturalGasTransportationTariffsPeriodConditionOne
1479 Natural gas transportation tariffs period, condition two Concept (xbrli:durationItemType) For Period tgs:NaturalGasTransportationTariffsPeriodConditionTwo
1480 Conversion rate of exchange for tariffs Concept (Pure) For Period tgs:ConversionRateOfExchangeForTariffs
1481 Number of years for negotiations under transitional agreement Concept (xbrli:durationItemType) For Period tgs:NumberOfYearsForNegotiationsUnderTransitionalAgreement
1482 Transitional Agreement [Abstract] Abstract tgs:TransitionalAgreementAbstract
1483 Percentage of increase in tariff Concept (Percent) As Of tgs:PercentageOfIncreaseInTariff
1484 Percentage of increase in tariff on service for natural gas transportation Concept (Percent) As Of tgs:PercentageOfIncreaseInTariffOnServiceForNaturalGasTransportation
1485 Percentage of increase in tariff on access and use Concept (Percent) As Of tgs:PercentageOfIncreaseInTariffOnAccessAndUse
1486 Percentage of tariff increase on public service of Natural Gas Transportation and CAU Concept (Percent) As Of tgs:PercentageOfTariffIncreaseOnPublicServiceOfNaturalGasTransportationAndCAU
1487 Extended period of RTI process Concept (xbrli:durationItemType) For Period tgs:ExtendedPeriodOfRTIProcess
1488 Investment plan period Concept (xbrli:durationItemType) For Period tgs:InvestmentPlanPeriod
1489 Five Year Plan investment amount Concept (Monetary) For Period Debit tgs:AcquisitionsInvestmentPropertyAmount
1490 091702 - Disclosure - REGULATORY FRAMEWORK, Regulatory Framework for Non-Regulated Segments (Details) Network

*

*

 http://tgs.com.ar./role/RegulatoryFrameworkRegulatoryFrameworkForNonregulatedSegmentsDetails
1491 Disclosure of detailed information about property, plant and equipment [table] Table

*

*

 ifrs-full:DisclosureOfPropertyPlantAndEquipmentTable
1492 Classes of property, plant and equipment [axis] Axis ifrs-full:ClassesOfPropertyPlantAndEquipmentAxis
1493 Property, plant and equipment [member] Member ifrs-full:PropertyPlantAndEquipmentMember
1494 Oil and gas assets [member] Member ifrs-full:OilAndGasAssetsMember
1495 Butane [Member] Member tgs:ButaneMember
1496 Propane [Member] Member tgs:PropaneMember
1497 Natural Gasoline [Member] Member tgs:NaturalGasolineMember
1498 Non-adjusting events after reporting period [axis] Axis ifrs-full:NonadjustingEventsAfterReportingPeriodAxis
1499 Non-adjusting events after reporting period [member] Member ifrs-full:NonadjustingEventsMember
1500 Subsequent events [Member] Member tgs:SubsequentEventsMember
1501 Sales channels [axis] Axis ifrs-full:SalesChannelsAxis
1502 Sales channels [member] Member ifrs-full:SalesChannelsMember
1503 Subsidies [Member] Member ifrs-full:GoodsSoldThroughIntermediariesMember
1504 Segments [axis] Axis ifrs-full:SegmentsAxis
1505 Segments [member] Member ifrs-full:SegmentsMember
1506 Production and Commercialization of Liquids [Member] Member tgs:ProductionAndCommercializationOfLiquidsMember
1507 Disclosure of detailed information about property, plant and equipment [line items] LineItems ifrs-full:DisclosureOfPropertyPlantAndEquipmentLineItems
1508 Domestic market [Abstract] Abstract tgs:DomesticMarketAbstract
1509 Increase in price of household bottles per ton Concept (Monetary) For Period Debit tgs:IncreaseInPriceOfHouseholdBottlesPerTon
1510 Increase in price of propane gas per ton Concept (Monetary) For Period Debit tgs:IncreaseInPriceOfPropaneGasPerTon
1511 Increase in price of propane gas per ton depending on customer Concept (Monetary) For Period Debit tgs:IncreaseInPriceOfPropaneGasPerTonDependingOnCustomer
1512 Subsidies booked Concept (Monetary) For Period Credit ifrs-full:RevenueFromGovernmentGrants
1513 Subsidies receivable from government Concept (Monetary) As Of Credit ifrs-full:CurrentGovernmentGrants
1514 Compensation received from government per ton Concept (Monetary) For Period Debit tgs:CompensationReceivedFromNationalGovernmentPerTon
1515 Foreign market [Abstract] Abstract tgs:ForeignMarketAbstract
1516 Export duty percentage Concept (Percent) As Of tgs:PercentageOfExportDuty
1517 Capped amount of each dollar of the tax base or the official FOB price Concept (Monetary) As Of Debit tgs:AmountOfEachDollarOfTheTaxBaseOrTheOfficialFOBPrice
1518 Tariff charge paid (per cubic meter) Concept (Per Unit) For Period tgs:TariffChargePaidPerCubicMeter
1519 Tariff charge (per cubic meter) Concept (Per Unit) For Period tgs:TariffChargePerCubicMeter
1520 091800 - Disclosure - ASSETS AND LIABILITIES IN FORREIGN CURRENCY (Details) Network

*

*

 http://tgs.com.ar./role/AssetsAndLiabilitiesInForreignCurrencyDetails
1521 Disclosure of detailed information about financial instruments [table] Table

*

*

 ifrs-full:DisclosureOfFinancialInstrumentsTable
1522 Types of risks [axis] Axis ifrs-full:TypesOfRisksAxis
1523 Risks [member] Member ifrs-full:TypesOfRisksMember
1524 Foreign Currency [member] Member ifrs-full:CurrencyRiskMember
1525 Classes of financial instruments [axis] Axis ifrs-full:ClassesOfFinancialInstrumentsAxis
1526 Financial instruments, class [member] Member ifrs-full:ClassesOfFinancialInstrumentsMember
1527 Cash and Cash Equivalents [Member] Member tgs:CashAndCashEquivalentMember
1528 Other Financial Assets at Amortized Cost [Member] Member ifrs-full:FinancialAssetsAtAmortisedCostCategoryMember
1529 Other Financial Assets at Fair Value Through Profit or Loss [Member] Member ifrs-full:FinancialAssetsAtFairValueThroughProfitOrLossCategoryMember
1530 Trade receivables [member] Member ifrs-full:TradeReceivablesMember
1531 Other Receivables [Member] Member tgs:OtherReceivablesMember
1532 Classes of financial liabilities [axis] Axis ifrs-full:ClassesOfFinancialLiabilitiesAxis
1533 Financial liabilities, class [member] Member ifrs-full:FinancialLiabilitiesMember
1534 Trade Payables [Member] Member tgs:TradePayablesMember
1535 Loans [Member] Member ifrs-full:ShorttermBorrowingsMember
1536 Loans [Member] Member ifrs-full:LongtermBorrowingsMember
1537 Disclosure of detailed information about financial instruments [line items] LineItems ifrs-full:DisclosureOfFinancialInstrumentsLineItems
1538 Foreign Currency Assets and Liabilities [Abstract] Abstract tgs:ForeignCurrencyAssetsAndLiabilitiesAbstract
1539 CURRENT ASSETS [Abstract] Abstract ifrs-full:CategoriesOfCurrentFinancialAssetsAbstract
1540 Total current assets Concept (Monetary) As Of Debit ifrs-full:CurrentFinancialAssets
1541 NON CURRENT ASSETS [Abstract] Abstract ifrs-full:CategoriesOfNoncurrentFinancialAssetsAbstract
1542 Total non-current assets Concept (Monetary) As Of Debit ifrs-full:NoncurrentFinancialAssets
1543 TOTAL ASSETS Concept (Monetary) As Of Debit ifrs-full:FinancialAssets
1544 Financial Liabilities [Abstract] Abstract ifrs-full:CategoriesOfFinancialLiabilitiesAbstract
1545 CURRENT LIABILITIES [Abstract] Abstract ifrs-full:CategoriesOfCurrentFinancialLiabilitiesAbstract
1546 Total current liabilities Concept (Monetary) As Of Credit ifrs-full:CurrentFinancialLiabilities
1547 NON CURRENT LIABILITIES [Abstract] Abstract ifrs-full:CategoriesOfNoncurrentFinancialLiabilitiesAbstract
1548 Total non-current liabilities Concept (Monetary) As Of Credit ifrs-full:NoncurrentFinancialLiabilities
1549 TOTAL LIABILITIES Concept (Monetary) As Of Credit ifrs-full:FinancialLiabilities
1550 Exchange rate (in Ps. per dollars) Concept (Decimal) As Of ifrs-full:ClosingForeignExchangeRate
1551 091900 - Disclosure - COMMON STOCK AND DIVIDENDS (Details) Network

*

*

 http://tgs.com.ar./role/CommonStockAndDividendsDetails
1552 Disclosure of classes of share capital [table] Table

*

*

 ifrs-full:DisclosureOfClassesOfShareCapitalTable
1553 Components of equity [axis] Axis ifrs-full:ComponentsOfEquityAxis
1554 Equity [member] Member ifrs-full:EquityMember
1555 Common Stock [Member] Member ifrs-full:IssuedCapitalMember
1556 Treasury Shares [Member] Member ifrs-full:TreasurySharesMember
1557 Classes of share capital [axis] Axis ifrs-full:ClassesOfShareCapitalAxis
1558 Share capital [member] Member ifrs-full:ClassesOfShareCapitalMember
1559 Ordinary shares [member] Member ifrs-full:OrdinarySharesMember
1560 Class "A" [Member] Member tgs:OrdinarySharesClassAMember
1561 Class "B" [Member] Member tgs:OrdinarySharesClassBMember
1562 Disclosure of classes of share capital [line items] LineItems ifrs-full:DisclosureOfClassesOfShareCapitalLineItems
1563 Common stock structure and shares [Abstract] Abstract tgs:CommonStockStructureAndSharesAbstract
1564 Outstanding shares (in shares) Concept (Shares) As Of ifrs-full:NumberOfSharesOutstanding
1565 Shares issued (in shares) Concept (Shares) As Of ifrs-full:NumberOfSharesIssued
1566 Face value common shares class (in dollars per share) Concept (Share) As Of ifrs-full:ParValuePerShare
1567 Number of votes for common stock Concept (Integer) For Period tgs:NumberOfVotesPerCommonStock
1568 Number of shares represents for each share on New York Stock Exchange (in shares) Concept (Shares) For Period tgs:CommonShareConversionForEachShareOnNewYorkStockExchangeNumber
1569 091902 - Disclosure - COMMON STOCK AND DIVIDENDS, Dividends distribution (Details) Network

*

*

 http://tgs.com.ar./role/CommonStockAndDividendsDividendsDistributionDetails
1570 Implied Table Table

*

*

 implied:Table
1571 COMMON STOCK AND DIVIDENDS [Abstract] Abstract ifrs-full:DisclosureOfClassesOfShareCapitalAbstract
1572 Amount Concept (Monetary) For Period Debit ifrs-full:DividendsPaidOrdinaryShares
1573 Amount per share (in dollars per share) Concept (Share) For Period ifrs-full:DividendsPaidOrdinarySharesPerShare
1574 091904 - Disclosure - COMMON STOCK AND DIVIDENDS, Acquisition of treasury shares (Details) Network

*

*

 http://tgs.com.ar./role/CommonStockAndDividendsAcquisitionOfTreasurySharesDetails
1575 Disclosure of classes of share capital [table] Table

*

*

 ifrs-full:DisclosureOfClassesOfShareCapitalTable
1576 Components of equity [axis] Axis ifrs-full:ComponentsOfEquityAxis
1577 Equity [member] Member ifrs-full:EquityMember
1578 Treasury Shares [Member] Member ifrs-full:TreasurySharesMember
1579 Disclosure of classes of share capital [line items] LineItems ifrs-full:DisclosureOfClassesOfShareCapitalLineItems
1580 Acquisition of treasury shares [Abstract] Abstract tgs:AcquisitionOfTreasurySharesAbstract
1581 Maximum amount invested for Shares Repurchase Program Concept (Monetary) As Of Credit tgs:ShareRepurchaseProgramAuthorizedAmount
1582 Shares Repurchase Program term Concept (xbrli:durationItemType) For Period tgs:ShareRepurchaseProgramPeriodInForce
1583 Shares Repurchase Program expiration date Concept (Date) For Period tgs:ShareRepurchaseProgramExpirationDate
1584 Shares issued (in shares) Concept (Shares) As Of ifrs-full:NumberOfSharesIssued
1585 Percentage of total common stock representing shares repurchased Concept (Percent) For Period tgs:SharesAcquiredPercentageOfShareCapital
1586 Acquisition cost restated to inflation amount Concept (Monetary) For Period Debit tgs:TreasurySharesAcquisitionCost
1587 092000 - Disclosure - LEGAL CLAIMS AND OTHER MATTERS (Details) Network

*

*

 http://tgs.com.ar./role/LegalClaimsAndOtherMattersDetails
1588 Implied Table Table

*

*

 implied:Table
1589 LEGAL CLAIMS AND OTHER MATTERS [Abstract] Abstract tgs:LegalClaimsAndOtherMattersAbstract
1590 Payment for claims to provincial agencies Concept (Monetary) For Period Credit tgs:PaymentForClaimsToProvincialAgencies
1591 Provisions for contingency Concept (Monetary) As Of Credit tgs:ContingencyProvisions
1592 Validity period of precautionary measure Concept (xbrli:durationItemType) For Period tgs:ValidityPeriodOfPrecautionaryMeasure
1593 Increase in tariff percentage Concept (Percent) For Period tgs:IncreaseDecreaseInTariffPercentage
1594 Receivables from income taxes and value added tax Concept (Monetary) As Of Debit tgs:ReceivablesFromIncomeTaxesAndValueAddedTax
1595 Claim amount for the omission as agent of withholding and collection of turnover tax Concept (Monetary) For Period Credit tgs:ClaimAmountForOmissionAsAgentOfWithholdingAndCollectionOfTurnoverTax
1596 Canceled partial debt claim amount Concept (Monetary) As Of Credit tgs:CanceledDebtClaimAmount
1597 Number of natural gas contracts executed Concept (Integer) For Period tgs:NumberOfNaturalGasContractsExecuted
1598 Claim amount due to lower allocation of products obtained Concept (Monetary) For Period Credit tgs:InsuranceClaimAmount
1599 Adjusted of claim Concept (Monetary) As Of Credit tgs:AdjustedAmountOfNominalDamagesClaimed
1600 Nominal damages Concept (Monetary) For Period Debit tgs:AmountOfNominalDamages
1601 Interest on nominal damages Concept (Monetary) For Period Debit tgs:InterestOnNominalDamages
1602 Damages to claimants Concept (Monetary) For Period Debit tgs:DamagesAwardedToClaimants
1603 Payment for damages Concept (Monetary) For Period Credit tgs:DamagesPaidValue
1604 Provision for other matters Concept (Monetary) As Of Credit ifrs-full:LegalProceedingsProvision
1605 092100 - Disclosure - BALANCES AND TRANSACTIONS WITH RELATED COMPANIES (Details) Network

*

*

 http://tgs.com.ar./role/BalancesAndTransactionsWithRelatedCompaniesDetails
1606 Disclosure of transactions between related parties [table] Table

*

*

 ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesTable
1607 Ownership [Axis] Axis srt:OwnershipAxis
1608 Ownership [Domain] Member srt:OwnershipDomain
1609 CIESA [Member] Member tgs:CompaiaaDeInversionesDeEnergiaSAMember
1610 Joint operations [axis] Axis ifrs-full:JointOperationsAxis
1611 Entity's total for joint operations [member] Member ifrs-full:EntitysTotalForJointOperationsMember
1612 Petrobras Argentina [Member] Member tgs:PetrobrasArgentinaSAMember
1613 Pampa Energia [Member] Member tgs:PampaEnergiaSAMember
1614 UT [Member] Member ifrs-full:JointOperationsMember
1615 Associates [axis] Axis ifrs-full:SignificantInvestmentsInAssociatesAxis
1616 Entity's total for associates [member] Member ifrs-full:EntitysTotalForAssociatesMember
1617 Link [Member] Member tgs:GasLinkSAMember
1618 EGS [Member] Member tgs:EmprendimientosDeGasDelSurSAMember
1619 TGU [Member] Member tgs:TransporteYServiciosDeGasEnUruguaySAMember
1620 CTG [Member] Member tgs:CTGEnergiaSAMember
1621 Categories of related parties [axis] Axis ifrs-full:CategoriesOfRelatedPartiesAxis
1622 Entity's total for related parties [member] Member ifrs-full:EntitysTotalForRelatedPartiesMember
1623 Related parties [member] Member ifrs-full:RelatedPartiesMember
1624 Compania Mega S.A. [Member] Member tgs:CompaniaMegaSAMember
1625 Braskem [Member] Member tgs:BraskemNetherlandsBVMember
1626 Petroleo Brasileiro [Member] Member tgs:PetroleoBrasileiroMember
1627 Refinor S.A. [Member] Member tgs:RefinorSAMember
1628 Petrolera Pampa S.A. [Member] Member tgs:PetroleraPampaSAMember
1629 SACDE [Member] Member tgs:SACDEMember
1630 Petrolera Entre Lomas S.A. [Member] Member tgs:PetroleraEntreLomasSAMember
1631 Pampa Comercializadora S.A. [Member] Member tgs:PampaComercializadoraSAMember
1632 Oleoductos del Valle S.A. [Member] Member tgs:OleoductosDelValleSAMember
1633 Petrouruguay S.A. [Member] Member tgs:PetrouruguaySAMember
1634 WEB S.A. [Member] Member tgs:WEBSAMember
1635 Central Piedra Buena S.A. [Member] Member tgs:CentralPiedraBuenaSAMember
1636 Central Temica Loma La Lata S.A. [Member] Member tgs:CentralTemicaLomaLaLataSAMember
1637 Central Termica Piedrabuena S.A. [Member] Member tgs:CentralTrmicaPiedrabuenaSAMember
1638 Transener S.A. [Member] Member tgs:TransenerSAMember
1639 Experta ART [Member] Member tgs:ExpertaARTMember
1640 Segments [axis] Axis ifrs-full:SegmentsAxis
1641 Segments [member] Member ifrs-full:SegmentsMember
1642 Natural Gas Transportation [Member] Member tgs:NaturalGasTransportationMember
1643 Production and Commercialization of Liquids [Member] Member tgs:ProductionAndCommercializationOfLiquidsMember
1644 Other Services [Member] Member tgs:OtherServicesMember
1645 Disclosure of transactions between related parties [line items] LineItems ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesLineItems
1646 Technical, financial and operational assistance agreement [abstract] Abstract tgs:TechnicalFinancialAndOperationalAssistanceAgreementAbstract
1647 Technical assistance agreement term renewal Concept (xbrli:durationItemType) For Period tgs:TechnicalAssistanceAgreementTermRenewal
1648 Percentage of annual comprehensive profits for providing operation and maintenance services Concept (Percent) For Period tgs:PercentageOfAnnualComprehensiveProfitForProvidingServices
1649 Compensation for key management member Concept (Monetary) For Period Debit ifrs-full:KeyManagementPersonnelCompensation
1650 Cash payments for acquisition Concept (Monetary) As Of Credit ifrs-full:CashTransferred
1651 Amount received for services Concept (Monetary) For Period Credit ifrs-full:RevenueFromRenderingOfServicesRelatedPartyTransactions
1652 Balances and transactions with related parties [Abstract] Abstract ifrs-full:OutstandingBalancesForRelatedPartyTransactionsAbstract
1653 Accounts receivable Concept (Monetary) As Of Debit ifrs-full:AmountsReceivableRelatedPartyTransactions
1654 Accounts payable Concept (Monetary) As Of Credit ifrs-full:AmountsPayableRelatedPartyTransactions
1655 Financial lease Concept (Monetary) As Of Credit ifrs-full:OutstandingCommitmentsMadeByEntityRelatedPartyTransactions
1656 Detail of Significant Transactions with Related Parties [abstract] Abstract ifrs-full:RelatedPartyTransactionsAbstract
1657 Revenues Concept (Monetary) For Period Credit ifrs-full:RevenueFromSaleOfGoodsRelatedPartyTransactions
1658 Costs [Abstract] Abstract tgs:CostsAbstract
1659 Gas purchase and others Concept (Monetary) For Period Debit ifrs-full:PurchasesOfGoodsRelatedPartyTransactions
1660 Compensation for technical assistance Concept (Monetary) For Period Debit tgs:TechnicalOperatorAssistanceFeesRelatedPartyTransactions
1661 Revenue for administrative services Concept (Monetary) For Period Debit ifrs-full:ServicesReceivedRelatedPartyTransactions
1662 Financial Results [Abstract] Abstract tgs:FinancialResultsAbstract
1663 Interest expenses Concept (Monetary) For Period Debit tgs:FinancialResultsInterestExpense
1664 092200 - Disclosure - CONTRACTUAL OBLIGATIONS (Details) Network

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 http://tgs.com.ar./role/ContractualObligationsDetails
1665 Disclosure of Contractual Obligations [Table] Table

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 tgs:DisclosureOfContractualObligationsTable
1666 Maturity [axis] Axis ifrs-full:MaturityAxis
1667 Aggregated time bands [member] Member ifrs-full:AggregatedTimeBandsMember
1668 Due Less than One Year [Member] Member tgs:DueLessThanOneYearMember
1669 Less than One year [Member] Member ifrs-full:NotLaterThanOneYearMember
1670 1-2 Years [Member] Member ifrs-full:LaterThanOneYearAndNotLaterThanTwoYearsMember
1671 3-5 Years [Member] Member ifrs-full:LaterThanThreeYearsAndNotLaterThanFiveYearsMember
1672 More than 5 Years [Member] Member ifrs-full:LaterThanFiveYearsMember
1673 Disclosure of Contractual Obligations [Line Items] LineItems tgs:DisclosureOfContractualObligationsLineItems
1674 Contractual commitments [abstract] Abstract ifrs-full:CapitalCommitmentsAbstract
1675 Financial indebtedness Concept (Monetary) As Of Credit ifrs-full:BankBorrowingsUndiscountedCashFlows
1676 Purchase obligations Concept (Monetary) As Of Credit tgs:PurchaseObligationUndiscountedCashFlows
1677 Financial Leases Concept (Monetary) As Of Credit ifrs-full:GrossFinanceLeaseObligations
1678 Total Concept (Monetary) As Of Credit ifrs-full:ContractualCapitalCommitments
1679 Exchange rate (in Ps. per dollars) Concept (Decimal) As Of ifrs-full:ClosingForeignExchangeRate
1680 092300 - Disclosure - ASSOCIATES AND JOINT ARRANGEMENTS (Details) Network

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 http://tgs.com.ar./role/AssociatesAndJointArrangementsDetails
1681 Associates and Joint Arrangements [Table] Table

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 tgs:AssociatesAndJointArrangementsTable
1682 Associates [axis] Axis ifrs-full:SignificantInvestmentsInAssociatesAxis
1683 Entity's total for associates [member] Member ifrs-full:EntitysTotalForAssociatesMember
1684 Link [Member] Member tgs:GasLinkSAMember
1685 TGU [Member] Member tgs:TransporteYServiciosDeGasEnUruguaySAMember
1686 EGS [Member] Member tgs:EmprendimientosDeGasDelSurSAMember
1687 CTG [Member] Member tgs:CTGEnergiaSAMember
1688 Joint operations [axis] Axis ifrs-full:JointOperationsAxis
1689 Entity's total for joint operations [member] Member ifrs-full:EntitysTotalForJointOperationsMember
1690 UT [Member] Member ifrs-full:JointOperationsMember
1691 Business combinations [axis] Axis ifrs-full:BusinessCombinationsAxis
1692 Entity's total for business combinations [member] Member ifrs-full:EntitysTotalForBusinessCombinationsMember
1693 Dinarel S.A. [Member] Member tgs:DinarelSAMember
1694 Pampa Energia [Member] Member tgs:PampaEnergiaSAMember
1695 TGU [Member] Member tgs:TransporteYServiciosDeGasEnUruguaySAMember
1696 Associates and Joint Arrangements [Line Items] LineItems tgs:AssociatesAndJointArrangementsLineItems
1697 Information about associates and arrangements [Abstract] Abstract tgs:InformationAboutAssociatesAndArrangementsAbstract
1698 Percentage of ownership Concept (Percent) For Period ifrs-full:ProportionOfOwnershipInterestInAssociate
1699 Purchase of fixed assets Concept (Monetary) For Period Credit ifrs-full:PurchaseOfPropertyPlantAndEquipmentClassifiedAsInvestingActivities
1700 Distribution of dividend in kind Concept (Monetary) For Period Debit ifrs-full:DividendsReceived
1701 Maximum execution period of the UT works Concept (xbrli:durationItemType) For Period tgs:MaximumExecutionPeriod
1702 Guarantee period from the provisional reception of the UT Works Concept (xbrli:durationItemType) For Period tgs:GuaranteePeriodFromProvisionalReception
1703 092400 - Disclosure - SUBSEQUENT EVENTS (Details) Network

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 http://tgs.com.ar./role/SubsequentEventsDetails
1704 Disclosure of non-adjusting events after reporting period [table] Table

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 ifrs-full:DisclosureOfNonadjustingEventsAfterReportingPeriodTable
1705 Non-adjusting events after reporting period [axis] Axis ifrs-full:NonadjustingEventsAfterReportingPeriodAxis
1706 Non-adjusting events after reporting period [member] Member ifrs-full:NonadjustingEventsMember
1707 Subsequent events [Member] Member tgs:SubsequentEventsMember
1708 Components of equity [axis] Axis ifrs-full:ComponentsOfEquityAxis
1709 Equity [member] Member ifrs-full:EquityMember
1710 Treasury Shares [Member] Member ifrs-full:TreasurySharesMember
1711 Disclosure of non-adjusting events after reporting period [line items] LineItems ifrs-full:DisclosureOfNonadjustingEventsAfterReportingPeriodLineItems
1712 Subsequent Event [Abstract] Abstract tgs:SubsequentEventAbstract
1713 Maximum amount approved for treasury shares repurchase program Concept (Monetary) As Of Credit tgs:ShareRepurchaseProgramAuthorizedAmount
1714 Shares Repurchase Program term Concept (xbrli:durationItemType) For Period tgs:ShareRepurchaseProgramPeriodInForce
1715 Shares issued (in shares) Concept (Shares) As Of ifrs-full:NumberOfSharesIssued
1716 Percentage of total common stock representing shares repurchased Concept (Percent) For Period tgs:SharesAcquiredPercentageOfShareCapital
1717 Increase in legal reserve Concept (Monetary) For Period Credit tgs:IncreaseInLegalReserve
1718 Cash dividends Concept (Monetary) As Of Credit ifrs-full:DividendPayables
1719 Cash dividends (in pesos per share) Concept (Share) For Period ifrs-full:DividendsPaidOrdinarySharesPerShare
1720 Voluntary reserve Concept (Monetary) As Of Credit tgs:VoluntaryReserveForCapitalExpendituresShareRepurchaseAndDividendPayment
1721 Percentage of voluntary reserve can be used for future invest, stock buyback and cash dividend payment Concept (Percent) For Period tgs:PercentageOfVoluntaryReserveAvailableForUse
1722 Cash dividend from voluntary reserve Concept (Monetary) As Of Credit tgs:DividendPayablesVoluntaryReserves
1723 Cash dividend from voluntary reserve (in pesos per sare) Concept (Share) For Period tgs:DividendsPaidOrdinarySharesPerShareVoluntaryReserves

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