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v3.22.1

SUBSEQUENT EVENTS (Details) - Subsequent Event [Member] $ in Millions | Apr. 05, 2022 ARS ($)
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Subsequent Event [Abstract] |
Increase in legal reserve | $ 1,138
Reserve for capital expenditures, acquisition of treasury shares and dividends | $ 67,707

X
- Definition Amount of increase in legal reserve approved by the ordinary shareholders. + References No definition available. + Details
Name: | tgs_IncreaseInLegalReserve
Namespace Prefix: | tgs_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The amount of reserve for capital expenditures, share repurchase and dividend payments. + References No definition available. + Details
Name: | tgs_ReserveForCapitalExpendituresShareRepurchaseAndDividendPayment
Namespace Prefix: | tgs_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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

X
- Details
Name: | ifrs-full_NonadjustingEventsAfterReportingPeriodAxis=tgs_SubsequentEventsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |