XML 69 R48.htm IDEA: XBRL DOCUMENT
v3.19.1

BUSINESS DESCRIPTION (Details) | 12 Months Ended
--- | ---
Dec. 31, 2018 Extension
Business Overview [Abstract] |
Term of transportation license granted | 35 years
Number of extension entitled | 1
Term of the extension | 10 years
CIESA [Member] |
Major Shareholders [Abstract] |
Percentage of ownership | 51.00%
Petrobras Participaciones S.L. [Member] |
Major Shareholders [Abstract] |
Percentage of ownership | 100.00%
Pampa Energia [Member] | CIESA [Member] |
Major Shareholders [Abstract] |
Percentage of ownership | 10.00%
Trust [Member] | CIESA [Member] |
Major Shareholders [Abstract] |
Percentage of ownership | 40.00%
GIP, WST and PCT [Member] | CIESA [Member] |
Major Shareholders [Abstract] |
Percentage of ownership | 50.00%
GIP [Member] | CIESA [Member] |
Major Shareholders [Abstract] |
Percentage of ownership | 27.10%
WST [Member] | CIESA [Member] |
Major Shareholders [Abstract] |
Percentage of ownership | 4.58%
PCT [Member] | CIESA [Member] |
Major Shareholders [Abstract] |
Percentage of ownership | 18.32%

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

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

X
- Definition Refers to the number of extensions entitled by the entity on license granted. + References No definition available. + Details
Name: | tgs_NumberOfExtensionOnLicenseGranted
Namespace Prefix: | tgs_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition The percentage proportional of ownership interest in another entity. + References No definition available. + Details
Name: | tgs_ProportionOfOwnershipInterest
Namespace Prefix: | tgs_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Term of extension on license granted to the entity. + References No definition available. + Details
Name: | tgs_TermOfExtensionOnLicenseGranted
Namespace Prefix: | tgs_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Term of transportation license granted to the entity for the transportation and extraction of natural gas. + References No definition available. + Details
Name: | tgs_TermOfTransportationLicenseGranted
Namespace Prefix: | tgs_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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

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

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

X
- Details
Name: | ifrs-full_BusinessCombinationsAxis=tgs_CompaniaDeInversionesDeEnergiaSATrustMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BusinessCombinationsAxis=tgs_GrupoInversorPetroquimicaSLWertheinGroupAndPCTLLCMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BusinessCombinationsAxis=tgs_GrupoInversorPetroquimicaSLMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BusinessCombinationsAxis=tgs_WertheinGroupSAMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BusinessCombinationsAxis=tgs_PCTLLCMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |