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PROPERTY, PLANT AND EQUIPMENT, Right-of-use Assets (Details) - ARS ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Other Services and Production and Commercialization of Liquids Segments [Abstract] |  |  |
Right-of-use assets | $ 13,824,116 | $ 21,486,639 |
Book value Variation of Rights-of Use [Abstract] |  |  |
Depreciation, right-of-use assets | (7,662,523) | (7,662,523) | $ (6,872,590)
Other Plants [Member] |  |  |
Other Services and Production and Commercialization of Liquids Segments [Abstract] |  |  |
Right-of-use assets | 3,042,284 | 4,867,655 |
Book value Variation of Rights-of Use [Abstract] |  |  |
Depreciation, right-of-use assets | (1,825,371) | (1,825,371) | (1,825,371)
Compressor Plants [Member] |  |  |
Other Services and Production and Commercialization of Liquids Segments [Abstract] |  |  |
Right-of-use assets | 7,553,175 | 12,085,080 |
Book value Variation of Rights-of Use [Abstract] |  |  |
Depreciation, right-of-use assets | (4,531,905) | (4,531,905) | (4,531,905)
Other Technical Installations [Member] |  |  |
Other Services and Production and Commercialization of Liquids Segments [Abstract] |  |  |
Right-of-use assets | 858,857 | 1,374,171 |
Book value Variation of Rights-of Use [Abstract] |  |  |
Depreciation, right-of-use assets | (515,314) | (515,314) | (515,314)
Buildings [Member] |  |  |
Other Services and Production and Commercialization of Liquids Segments [Abstract] |  |  |
Right-of-use assets | 2,369,800 | 3,159,733 |
Book value Variation of Rights-of Use [Abstract] |  |  |
Depreciation, right-of-use assets | $ (789,933) | $ (789,933) | $ 0

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- Definition The amount of depreciation of right-of-use assets. [Refer: Depreciation and amortisation expense; Right-of-use assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 16 -IssueDate 2024-01-01 -Paragraph 53 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2024-en-r&anchor=para_53_a&doctype=Standard -URIDate 2024-03-27 + Details
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Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

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- Definition The amount of assets that represent a lessee's right to use an underlying asset for the lease term that do not meet the definition of investment property. Underlying asset is an asset that is the subject of a lease, for which the right to use that asset has been provided by a lessor to a lessee. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 16 -IssueDate 2024-01-01 -Paragraph 53 -Subparagraph j -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2024-en-r&anchor=para_53_j&doctype=Standard -URIDate 2024-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 16 -IssueDate 2024-01-01 -Paragraph 47 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2024-en-r&anchor=para_47_a&doctype=Standard -URIDate 2024-03-27 + Details
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Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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

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

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- Details
Name: | ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis=tgs_OtherPlantsMember
Namespace Prefix: |
Data Type: | na
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Period Type: |

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- Details
Name: | ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis=tgs_CompressorPlantsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis=tgs_OtherTechnicalInstallationsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
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- Details
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Data Type: | na
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