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BALANCES AND TRANSACTIONS WITH RELATED COMPANIES (Details) $ in Thousands, $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2024 ARS ($) | Dec. 31, 2023 ARS ($) | Dec. 31, 2022 ARS ($) | Dec. 31, 2024 USD ($)
Technical, financial and operational assistance agreement [abstract] |  |  |  |  |  |  |
Compensation for key management member |  | $ 3,541,956 |  | $ 3,430,226 |  | $ 2,895,727 |
Balances and transactions with related parties [Abstract] |  |  |  |  |  |  |
Accounts receivable |  | 15,577,933 |  | 14,555,559 |  |  |
Accounts payable |  | 33,030,793 |  | 46,074,564 |  |  |
Financial assets at fair value through profit or loss |  | 464,955,449 |  | 473,717,157 |  |  |
Costs [Abstract] |  |  |  |  |  |  |
Gas purchase and others |  | 34,550,518 |  | 35,979,882 |  | 39,509,571 |
Compensation for technical assistance |  | 26,405,660 |  | 13,236,442 |  | 20,799,669 |
Revenue for administrative services |  | 145 |  | 477 |  | 1,098 |
Financial Results [Abstract] |  |  |  |  |  |  |
Interest expense |  | 1,365,343 |  | 1,998,012 |  | 2,594,867 |
Interest gain / Gain / (loss) on fair value |  | 784,372 |  | 14,830,319 |  | 653,774 |
Selling expenses | [1] | 540,845 |  | 308,040 |  | 210,621 |
Natural Gas Transportation [Member] |  |  |  |  |  |  |
Detail of Significant Transactions with Related Parties [abstract] |  |  |  |  |  |  |
Revenues |  | 19,193,654 |  | 9,061,787 |  | 12,002,820 |
Liquids Production and Commercialization [Member] |  |  |  |  |  |  |
Detail of Significant Transactions with Related Parties [abstract] |  |  |  |  |  |  |
Revenues |  | 16,099,079 |  | 18,740,254 |  | 24,299,050 |
Midstream [Member] |  |  |  |  |  |  |
Detail of Significant Transactions with Related Parties [abstract] |  |  |  |  |  |  |
Revenues |  | 50,261,530 |  | 38,952,430 |  | 27,428,146 |
Comercializadora e Inversora S.A. [Member] |  |  |  |  |  |  |
Balances and transactions with related parties [Abstract] |  |  |  |  |  |  |
Accounts receivable |  | 0 |  | 83,399 |  |  |
Accounts payable |  | 0 |  | 121,255 |  |  |
Costs [Abstract] |  |  |  |  |  |  |
Gas purchase and others |  | 0 | [2] | 0 |  | 0 |
Compensation for technical assistance |  | 0 | [2] | 0 |  | 0 |
Revenue for administrative services |  | 0 | [2] | 0 |  | 0 |
Financial Results [Abstract] |  |  |  |  |  |  |
Interest expense |  | 0 | [2] | 0 |  | 0 |
Interest gain / Gain / (loss) on fair value |  | 0 | [2] | 0 |  | 0 |
Selling expenses | [1] | 0 | [2] | 0 |  | 0 |
Comercializadora e Inversora S.A. [Member] | Natural Gas Transportation [Member] |  |  |  |  |  |  |
Detail of Significant Transactions with Related Parties [abstract] |  |  |  |  |  |  |
Revenues |  | 2,107,038 | [2] | 1,525,447 |  | 2,024,688 |
Comercializadora e Inversora S.A. [Member] | Liquids Production and Commercialization [Member] |  |  |  |  |  |  |
Detail of Significant Transactions with Related Parties [abstract] |  |  |  |  |  |  |
Revenues |  | 0 | [2] | 0 |  | 0 |
Comercializadora e Inversora S.A. [Member] | Midstream [Member] |  |  |  |  |  |  |
Detail of Significant Transactions with Related Parties [abstract] |  |  |  |  |  |  |
Revenues |  | 0 | [2] | 0 |  | 0 |
CT Barragan S.A. [Member] |  |  |  |  |  |  |
Balances and transactions with related parties [Abstract] |  |  |  |  |  |  |
Accounts receivable |  | 30,807 |  | 33,880 |  |  |
Accounts payable |  | 0 |  | 0 |  |  |
Costs [Abstract] |  |  |  |  |  |  |
Gas purchase and others |  | 0 |  | 0 |  | 0 |
Compensation for technical assistance |  | 0 |  | 0 |  | 0 |
Revenue for administrative services |  | 0 |  | 0 |  | 0 |
Financial Results [Abstract] |  |  |  |  |  |  |
Interest expense |  | 0 |  | 0 |  | 0 |
Interest gain / Gain / (loss) on fair value |  | 784,372 |  | 14,830,319 |  | 653,774 |
Selling expenses | [1] | 0 |  | 0 |  | 0 |
CT Barragan S.A. [Member] | Natural Gas Transportation [Member] |  |  |  |  |  |  |
Detail of Significant Transactions with Related Parties [abstract] |  |  |  |  |  |  |
Revenues |  | 0 |  | 0 |  | 0 |
CT Barragan S.A. [Member] | Liquids Production and Commercialization [Member] |  |  |  |  |  |  |
Detail of Significant Transactions with Related Parties [abstract] |  |  |  |  |  |  |
Revenues |  | 0 |  | 0 |  | 0 |
CT Barragan S.A. [Member] | Midstream [Member] |  |  |  |  |  |  |
Detail of Significant Transactions with Related Parties [abstract] |  |  |  |  |  |  |
Revenues |  | 128,844 |  | 130,421 |  | 118,396 |
CT Barragan S.A. [Member] | Private Debt Bonds with Related Parties [Member] |  |  |  |  |  |  |
Balances and transactions with related parties [Abstract] |  |  |  |  |  |  |
Financial assets at fair value through profit or loss |  | 20,471,497 |  | 21,739,106 |  |  |
SACDE [Member] |  |  |  |  |  |  |
Balances and transactions with related parties [Abstract] |  |  |  |  |  |  |
Accounts receivable | [3] | 2,257,463 |  | 24,051 |  |  |
Accounts payable | [3] | 11,159,046 |  | 8,799,269 |  |  |
Costs [Abstract] |  |  |  |  |  |  |
Gas purchase and others |  | 0 |  | 0 |  | 0 |
Compensation for technical assistance |  | 0 |  | 0 |  | 0 |
Revenue for administrative services |  | 0 |  | 0 |  | 0 |
Financial Results [Abstract] |  |  |  |  |  |  |
Interest expense |  | 0 |  | 0 |  | 0 |
Interest gain / Gain / (loss) on fair value |  | 0 |  | 0 |  | 0 |
Selling expenses | [1] | 0 |  | 0 |  | 0 |
Other receivables |  | 131,330,449 |  |  |  |  |
SACDE [Member] | Natural Gas Transportation [Member] |  |  |  |  |  |  |
Detail of Significant Transactions with Related Parties [abstract] |  |  |  |  |  |  |
Revenues |  | 0 |  | 0 |  | 0 |
SACDE [Member] | Liquids Production and Commercialization [Member] |  |  |  |  |  |  |
Detail of Significant Transactions with Related Parties [abstract] |  |  |  |  |  |  |
Revenues |  | 0 |  | 0 |  | 0 |
SACDE [Member] | Midstream [Member] |  |  |  |  |  |  |
Detail of Significant Transactions with Related Parties [abstract] |  |  |  |  |  |  |
Revenues |  | 217,663 |  | 116,001 |  | 48,847 |
SACDE [Member] | Other Credits [Member] |  |  |  |  |  |  |
Balances and transactions with related parties [Abstract] |  |  |  |  |  |  |
Accounts receivable |  | 2,120,362 |  |  |  |  |
Transener S.A. [Member] |  |  |  |  |  |  |
Balances and transactions with related parties [Abstract] |  |  |  |  |  |  |
Accounts receivable |  | 48,625 |  | 133 |  |  |
Accounts payable |  | 0 |  | 0 |  |  |
Costs [Abstract] |  |  |  |  |  |  |
Gas purchase and others |  | 0 |  | 0 |  | 0 |
Compensation for technical assistance |  | 0 |  | 0 |  | 0 |
Revenue for administrative services |  | 0 |  | 0 |  | 0 |
Financial Results [Abstract] |  |  |  |  |  |  |
Interest expense |  | 0 |  | 0 |  | 0 |
Interest gain / Gain / (loss) on fair value |  | 0 |  | 0 |  | 0 |
Selling expenses | [1] | 0 |  | 0 |  | 0 |
Transener S.A. [Member] | Natural Gas Transportation [Member] |  |  |  |  |  |  |
Detail of Significant Transactions with Related Parties [abstract] |  |  |  |  |  |  |
Revenues |  | 0 |  | 0 |  | 0 |
Transener S.A. [Member] | Liquids Production and Commercialization [Member] |  |  |  |  |  |  |
Detail of Significant Transactions with Related Parties [abstract] |  |  |  |  |  |  |
Revenues |  | 0 |  | 0 |  | 0 |
Transener S.A. [Member] | Midstream [Member] |  |  |  |  |  |  |
Detail of Significant Transactions with Related Parties [abstract] |  |  |  |  |  |  |
Revenues |  | 376 |  | 1,291 |  | 2,829 |
Fundacion TGS [Member] |  |  |  |  |  |  |
Costs [Abstract] |  |  |  |  |  |  |
Gas purchase and others |  | 0 |  | 0 |  | 0 |
Compensation for technical assistance |  | 0 |  | 0 |  | 0 |
Revenue for administrative services |  | 0 |  | 0 |  | 0 |
Financial Results [Abstract] |  |  |  |  |  |  |
Interest expense |  | 0 |  | 0 |  | 0 |
Interest gain / Gain / (loss) on fair value |  | 0 |  | 0 |  | 0 |
Selling expenses | [1] | 540,845 |  | 308,040 |  | 210,621 |
Fundacion TGS [Member] | Natural Gas Transportation [Member] |  |  |  |  |  |  |
Detail of Significant Transactions with Related Parties [abstract] |  |  |  |  |  |  |
Revenues |  | 0 |  | 0 |  | 0 |
Fundacion TGS [Member] | Liquids Production and Commercialization [Member] |  |  |  |  |  |  |
Detail of Significant Transactions with Related Parties [abstract] |  |  |  |  |  |  |
Revenues |  | 0 |  | 0 |  | 0 |
Fundacion TGS [Member] | Midstream [Member] |  |  |  |  |  |  |
Detail of Significant Transactions with Related Parties [abstract] |  |  |  |  |  |  |
Revenues |  | 0 |  | 0 |  | 0 |
Link [Member] |  |  |  |  |  |  |
Balances and transactions with related parties [Abstract] |  |  |  |  |  |  |
Accounts receivable |  | 29,595 |  | 38,019 |  |  |
Accounts payable |  | 0 |  | 0 |  |  |
Costs [Abstract] |  |  |  |  |  |  |
Gas purchase and others |  | 0 |  | 0 |  | 0 |
Compensation for technical assistance |  | 0 |  | 0 |  | 0 |
Revenue for administrative services |  | 0 |  | 0 |  | 0 |
Financial Results [Abstract] |  |  |  |  |  |  |
Interest expense |  | 0 |  | 0 |  | 0 |
Interest gain / Gain / (loss) on fair value |  | 0 |  | 0 |  | 0 |
Selling expenses | [1] | 0 |  | 0 |  | 0 |
Link [Member] | Natural Gas Transportation [Member] |  |  |  |  |  |  |
Detail of Significant Transactions with Related Parties [abstract] |  |  |  |  |  |  |
Revenues |  | 0 |  | 0 |  | 0 |
Link [Member] | Liquids Production and Commercialization [Member] |  |  |  |  |  |  |
Detail of Significant Transactions with Related Parties [abstract] |  |  |  |  |  |  |
Revenues |  | 0 |  | 0 |  | 0 |
Link [Member] | Midstream [Member] |  |  |  |  |  |  |
Detail of Significant Transactions with Related Parties [abstract] |  |  |  |  |  |  |
Revenues |  | 302,193 |  | 307,484 |  | 317,027 |
TGU [Member] |  |  |  |  |  |  |
Balances and transactions with related parties [Abstract] |  |  |  |  |  |  |
Accounts receivable |  | 0 |  | 0 |  |  |
Accounts payable |  | 0 |  | 280,225 |  |  |
Pampa Energia [Member] |  |  |  |  |  |  |
Balances and transactions with related parties [Abstract] |  |  |  |  |  |  |
Accounts receivable | [4] | 13,211,443 |  | 14,376,077 |  |  |
Accounts payable |  | 21,871,747 | [4] | 36,873,815 | [4] |  | $ 0.5
Costs [Abstract] |  |  |  |  |  |  |
Gas purchase and others |  | 34,550,518 |  | 35,979,882 |  | 39,509,571 |
Compensation for technical assistance |  | 26,405,660 |  | 13,236,442 |  | 20,799,669 |
Revenue for administrative services |  | 0 |  | 0 |  | 0 |
Financial Results [Abstract] |  |  |  |  |  |  |
Interest expense |  | 1,365,343 |  | 1,998,012 |  | 2,594,867 |
Interest gain / Gain / (loss) on fair value |  | 0 |  | 0 |  | 0 |
Selling expenses | [1] | $ 0 |  | 0 |  | 0 |
Pampa Energia [Member] | From 12/28/2019 to 12/27/2020 [Member] |  |  |  |  |  |  |
Technical, financial and operational assistance agreement [abstract] |  |  |  |  |  |  |
Percentage of annual comprehensive income before results and income taxes |  | 6.50% |  |  |  |  |
Pampa Energia [Member] | From 12/28/2020 to 12/27/2021 [Member] |  |  |  |  |  |  |
Technical, financial and operational assistance agreement [abstract] |  |  |  |  |  |  |
Percentage of annual comprehensive income before results and income taxes |  | 6.00% |  |  |  |  |
Pampa Energia [Member] | From 12/28/2021 to 12/27/2022 [Member] |  |  |  |  |  |  |
Technical, financial and operational assistance agreement [abstract] |  |  |  |  |  |  |
Percentage of annual comprehensive income before results and income taxes |  | 5.50% |  |  |  |  |
Pampa Energia [Member] | From 12/28/2022 to 12/27/2023 [Member] |  |  |  |  |  |  |
Technical, financial and operational assistance agreement [abstract] |  |  |  |  |  |  |
Percentage of annual comprehensive income before results and income taxes |  | 5.00% |  |  |  |  |
Pampa Energia [Member] | From 12/28/2023 to 12/27/2024 and onwards [Member] |  |  |  |  |  |  |
Technical, financial and operational assistance agreement [abstract] |  |  |  |  |  |  |
Percentage of annual comprehensive income before results and income taxes |  | 4.50% |  |  |  |  |
Pampa Energia [Member] | Natural Gas Transportation [Member] |  |  |  |  |  |  |
Detail of Significant Transactions with Related Parties [abstract] |  |  |  |  |  |  |
Revenues |  | $ 17,086,616 |  | 7,536,340 |  | 9,978,132 |
Pampa Energia [Member] | Liquids Production and Commercialization [Member] |  |  |  |  |  |  |
Detail of Significant Transactions with Related Parties [abstract] |  |  |  |  |  |  |
Revenues |  | 16,099,079 |  | 18,740,254 |  | 24,299,050 |
Pampa Energia [Member] | Midstream [Member] |  |  |  |  |  |  |
Detail of Significant Transactions with Related Parties [abstract] |  |  |  |  |  |  |
Revenues |  | 49,612,454 |  | 38,397,233 |  | 26,941,047 |
Pampa Energia [Member] | Private Debt Bonds with Related Parties [Member] |  |  |  |  |  |  |
Balances and transactions with related parties [Abstract] |  |  |  |  |  |  |
Financial assets at fair value through profit or loss |  | 20,471,497 |  | 21,739,106 |  |  |
Pampa Energia [Member] | Financial Leasing [Member] |  |  |  |  |  |  |
Balances and transactions with related parties [Abstract] |  |  |  |  |  |  |
Accounts payable |  | 11,540,062 |  | 32,114,859 |  |  |
CIESA [Member] |  |  |  |  |  |  |
Costs [Abstract] |  |  |  |  |  |  |
Gas purchase and others |  | 0 |  | 0 |  | 0 |
Compensation for technical assistance |  | 0 |  | 0 |  | 0 |
Revenue for administrative services |  | 145 |  | 477 |  | 1,098 |
Financial Results [Abstract] |  |  |  |  |  |  |
Interest expense |  | 0 |  | 0 |  | 0 |
Interest gain / Gain / (loss) on fair value |  | 0 |  | 0 |  | 0 |
Selling expenses | [1] | 0 |  | 0 |  | 0 |
CIESA [Member] | Natural Gas Transportation [Member] |  |  |  |  |  |  |
Detail of Significant Transactions with Related Parties [abstract] |  |  |  |  |  |  |
Revenues |  | 0 |  | 0 |  | 0 |
CIESA [Member] | Liquids Production and Commercialization [Member] |  |  |  |  |  |  |
Detail of Significant Transactions with Related Parties [abstract] |  |  |  |  |  |  |
Revenues |  | 0 |  | 0 |  | 0 |
CIESA [Member] | Midstream [Member] |  |  |  |  |  |  |
Detail of Significant Transactions with Related Parties [abstract] |  |  |  |  |  |  |
Revenues |  | $ 0 |  | $ 0 |  | $ 0 |
[1] | Corresponds to donations expenses.
[2] | On October 3, 2024, it was merged with Pampa Energía.
[3] | Accounts receivable as of December 31, 2024 includes Ps. 2,120,362 recorded in “Other Credits”.
[4] | Accounts payable includes Ps. 11,540,062 and Ps. 32,114,859 corresponding to the financial leasing recorded as “Loans” as of December 31, 2024 and 2023, respectively.

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- Definition The amount of expenses for technical operator assistance fees in related party transactions. + References No definition available. + Details
Name: | tgs_TechnicalOperatorAssistanceFeesRelatedPartyTransactions
Namespace Prefix: | tgs_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Details
Name: | ifrs-full_SegmentsAxis=tgs_NaturalGasTransportationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | ifrs-full_SegmentsAxis=tgs_ProductionAndCommercializationOfLiquidsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | ifrs-full_SegmentsAxis=tgs_MidstreamMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | ifrs-full_CategoriesOfRelatedPartiesAxis=tgs_ComercializadoraEInversoraSAPreviouslyPampaComercializadoraSAMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | ifrs-full_CategoriesOfRelatedPartiesAxis=tgs_CTBarraganSAMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | ifrs-full_ClassesOfFinancialAssetsAxis=tgs_PrivateBondsRelatedPartiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | ifrs-full_CategoriesOfRelatedPartiesAxis=tgs_SACDEMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | ifrs-full_ClassesOfFinancialAssetsAxis=tgs_IncreaseDecreaseInProvisionsIncludingJudicialCosts
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | ifrs-full_CategoriesOfRelatedPartiesAxis=tgs_TransenerSAMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | ifrs-full_CategoriesOfRelatedPartiesAxis=tgs_FundacionTGSMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | ifrs-full_SignificantInvestmentsInAssociatesAxis=tgs_GasLinkSAMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | ifrs-full_SignificantInvestmentsInAssociatesAxis=tgs_TransporteYServiciosDeGasEnUruguaySAMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | ifrs-full_ConsolidatedStructuredEntitiesAxis=tgs_PampaEnergiaSAMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | ifrs-full_MaturityAxis=tgs_IncomeTaxesPeriodOneMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | ifrs-full_MaturityAxis=tgs_IncomeTaxesPeriodTwoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | ifrs-full_MaturityAxis=tgs_IncomeTaxesPeriodThreeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | ifrs-full_MaturityAxis=tgs_IncomeTaxesPeriodFourMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | ifrs-full_MaturityAxis=tgs_IncomeTaxesPeriodLaterThanFourYearsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | ifrs-full_LiabilitiesArisingFromFinancingActivitiesAxis=ifrs-full_LeaseLiabilitiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | srt_OwnershipAxis=tgs_CompaiaaDeInversionesDeEnergiaSAMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |