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INCOME TAX AND DEFERRED TAX, Analysis of Deferred Tax Assets and Liabilities (Details) - ARS ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020
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Deferred tax assets [Abstract] |  |
Deferred tax assets to be recovered after more than 12 months | $ 4,027,923 | $ 1,887,237
Deferred tax assets to be recovered after less than 12 months | 640,585 | 562,048
Subtotal deferred tax assets | 4,668,508 | 2,449,285
Deferred tax liabilities [Abstract] |  |
Deferred tax liabilities to be recovered after more than 12 months | (14,778,469) | (13,325,708)
Deferred tax liabilities to be recovered after less than 12 months | (166,265) | (366,604)
Subtotal deferred tax liabilities | (14,944,734) | (13,692,312)
Deferred tax liabilities, net | (10,276,226) | (11,243,027)
Deferred tax assets | $ 23,757 | $ 37,240

X
- Definition The amounts of income taxes recoverable in future periods in respect of: (a) deductible temporary differences; (b) the carryforward of unused tax losses; and (c) the carryforward of unused tax credits. [Refer: Temporary differences [member]; Unused tax credits [member]; Unused tax losses [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2021-01-01 -Paragraph 81 -Subparagraph g -Clause i -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=12&code=ifrs-tx-2021-en-r&anchor=para_81_g_i&doctype=Standard -URIDate 2021-03-24 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2021-01-01 -Paragraph 54 -Subparagraph o -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2021-en-r&anchor=para_54_o&doctype=Standard -URIDate 2021-03-24 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2021-01-01 -Paragraph 56 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2021-en-r&anchor=para_56&doctype=Standard -URIDate 2021-03-24 + Details
Name: | ifrs-full_DeferredTaxAssets
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition The amount of deferred tax liabilities or assets. [Refer: Deferred tax liabilities; Deferred tax assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2021-01-01 -Paragraph 81 -Subparagraph g -Clause i -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=12&code=ifrs-tx-2021-en-r&anchor=para_81_g_i&doctype=Standard -URIDate 2021-03-24 + Details
Name: | ifrs-full_DeferredTaxLiabilityAsset
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The amounts of income taxes recoverable in future periods in respect of: (a) deductible temporary differences; (b) the carryforward of unused tax losses; and (c) the carryforward of unused tax credits. + References No definition available. + Details
Name: | tgs_DeferredIncomeTaxAssets
Namespace Prefix: | tgs_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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

X
- Definition The amounts of income taxes recoverable within 12 months in future periods in respect of: (a) deductible temporary differences; (b) the carryforward of unused tax losses; and (c) the carryforward of unused tax credits. + References No definition available. + Details
Name: | tgs_DeferredIncomeTaxAssetsCurrent
Namespace Prefix: | tgs_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The amounts of income taxes recoverable after 12 months in future periods in respect of: (a) deductible temporary differences; (b) the carryforward of unused tax losses; and (c) the carryforward of unused tax credits. + References No definition available. + Details
Name: | tgs_DeferredIncomeTaxAssetsNoncurrent
Namespace Prefix: | tgs_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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

X
- Definition The amounts of income taxes payable within 12 months in future periods in respect of taxable temporary differences. + References No definition available. + Details
Name: | tgs_DeferredIncomeTaxLiabilitiesCurrent
Namespace Prefix: | tgs_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The amounts of income taxes payable after 12 months in future periods in respect of taxable temporary differences. + References No definition available. + Details
Name: | tgs_DeferredIncomeTaxLiabilitiesNoncurrent
Namespace Prefix: | tgs_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The amounts of income taxes payable in future periods in respect of taxable temporary differences. + References No definition available. + Details
Name: | tgs_SubtotalDeferredTaxLiabilities
Namespace Prefix: | tgs_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant