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DETAIL OF SIGNIFICANT STATEMENT OF FINANCIAL POSITION AND STATEMENT OF COMPREHENSIVE INCOME CAPTIONS, Expenses by Nature (Details) - ARS ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Expenses by Nature [abstract] |  |  |  |  |  |
Salaries, wages and other compensations | $ 5,962,507 |  | $ 6,114,350 |  | $ 6,562,187 |
Social security taxes | 1,209,356 |  | 1,243,670 |  | 1,222,911 |
Compensation to Directors and Supervisory Committee | 63,755 |  | 60,436 |  | 66,843 |
Professional services fees | 511,324 |  | 477,404 |  | 992,795 |
Technical operator assistance fees | 2,181,985 |  | 2,159,162 |  | 2,352,434 |
Materials | 822,076 |  | 683,822 |  | 796,845 |
Third parties services | 726,165 |  | 782,044 |  | 895,680 |
Telecommunications and post expenses | 48,753 |  | 71,577 |  | 92,079 |
Rents | 31,379 |  | 38,033 |  | 89,920 |
Transports and freight | 255,090 |  | 236,569 |  | 238,343 |
Easements | 182,460 |  | 148,593 |  | 188,932 |
Offices supplies | 19,831 |  | 13,670 |  | 27,395 |
Travels expenses | 56,179 |  | 103,124 |  | 272,248 |
Insurance | 437,480 |  | 386,256 |  | 198,092 |
Property, plant and equipment maintenance | 4,011,920 |  | 2,826,307 |  | 5,274,937 |
Depreciation of property, plant and equipment | 9,610,783 |  | 9,299,865 |  | 7,594,226 |
Taxes and contributions | 5,356,249 |  | 4,533,369 |  | 6,255,346 |
Advertising | 53,158 |  | 129,805 |  | 185,225 |
Doubtful accounts | (66,591) |  | 143,496 |  | 5,004 |
Banks expenses | 11,982 |  | 35,824 |  | 39,677 |
Interests expense | 4,468,022 |  | 5,069,041 |  | 5,157,490 |
Foreign exchange loss | 12,443,627 |  | 22,393,825 |  | 32,131,915 |
Capitalized financial costs | 0 |  | 0 |  | (916,898) |
Costs of services rendered to third parties | 57,472 |  | 164,024 |  | 28,078 |
Other expenses | 149,460 |  | 81,049 |  | 272,701 |
Total | 48,604,422 |  | 57,195,315 |  | 70,024,404 |
Tax on exports | 1,575,910 |  | 635,724 |  | 1,733,163 |
Operating Expenses, Regulated Activities [Member] |  |  |  |  |  |
Expenses by Nature [abstract] |  |  |  |  |  |
Salaries, wages and other compensations | 2,580,747 |  | 2,737,746 |  | 3,006,783 |
Social security taxes | 537,899 |  | 535,986 |  | 558,138 |
Compensation to Directors and Supervisory Committee | 0 |  | 0 |  | 0 |
Professional services fees | 36,077 |  | 52,098 |  | 31,612 |
Technical operator assistance fees | 381,998 |  | 889,725 |  | 1,595,035 |
Materials | 272,813 |  | 247,949 |  | 348,136 |
Third parties services | 340,084 |  | 355,546 |  | 369,962 |
Telecommunications and post expenses | 9,623 |  | 20,133 |  | 26,623 |
Rents | 14,509 |  | 15,239 |  | 26,133 |
Transports and freight | 147,577 |  | 140,247 |  | 150,010 |
Easements | 171,468 |  | 132,186 |  | 179,533 |
Offices supplies | 6,992 |  | 4,660 |  | 8,258 |
Travels expenses | 31,286 |  | 46,362 |  | 134,592 |
Insurance | 254,192 |  | 221,742 |  | 96,809 |
Property, plant and equipment maintenance | 3,387,369 |  | 2,429,955 |  | 4,588,739 |
Depreciation of property, plant and equipment | 6,450,418 |  | 6,373,039 |  | 5,841,477 |
Taxes and contributions | 929,080 |  | 763,375 |  | 686,707 |
Advertising | 0 |  | 0 |  | 0 |
Doubtful accounts | 0 |  | 0 |  | 0 |
Banks expenses | 0 |  | 0 |  | 0 |
Interests expense | 0 |  | 0 |  | 0 |
Foreign exchange loss | 0 |  | 0 |  | 0 |
Capitalized financial costs |  |  | 0 |  | 0 |
Costs of services rendered to third parties | 0 |  | 0 |  | 0 |
Other expenses | 53,426 |  | 33,935 |  | 162,831 |
Total | 15,605,558 |  | 14,999,923 |  | 17,811,378 |
Operating Expenses, Non Regulated Activities [Member] |  |  |  |  |  |
Expenses by Nature [abstract] |  |  |  |  |  |
Salaries, wages and other compensations | 1,993,744 |  | 1,910,040 |  | 1,958,803 |
Social security taxes | 421,436 |  | 382,148 |  | 350,378 |
Compensation to Directors and Supervisory Committee | 0 |  | 0 |  | 0 |
Professional services fees | 53,385 |  | 20,074 |  | 510,954 |
Technical operator assistance fees | 1,799,987 |  | 1,269,437 |  | 757,399 |
Materials | 549,239 |  | 435,873 |  | 448,709 |
Third parties services | 345,773 |  | 396,534 |  | 457,969 |
Telecommunications and post expenses | 9,399 |  | 15,884 |  | 12,528 |
Rents | 8,431 |  | 7,826 |  | 43,443 |
Transports and freight | 103,381 |  | 92,443 |  | 83,329 |
Easements | 10,992 |  | 16,407 |  | 9,399 |
Offices supplies | 4,354 |  | 1,944 |  | 4,747 |
Travels expenses | 10,851 |  | 30,146 |  | 73,845 |
Insurance | 153,008 |  | 137,381 |  | 78,295 |
Property, plant and equipment maintenance | 582,634 |  | 347,456 |  | 613,203 |
Depreciation of property, plant and equipment | 2,503,669 |  | 2,412,773 |  | 1,433,088 |
Taxes and contributions | 38,404 |  | 39,366 |  | 50,291 |
Advertising | 0 |  | 0 |  | 0 |
Doubtful accounts | 0 |  | 0 |  | 0 |
Banks expenses | 0 |  | 0 |  | 0 |
Interests expense | 0 |  | 0 |  | 0 |
Foreign exchange loss | 0 |  | 0 |  | 0 |
Capitalized financial costs |  |  | 0 |  | 0 |
Costs of services rendered to third parties | 57,472 |  | 164,024 |  | 28,078 |
Other expenses | 81,645 |  | 33,175 |  | 90,163 |
Total | 8,727,804 |  | 7,712,931 |  | 7,004,621 |
Administrative Expenses [Member] |  |  |  |  |  |
Expenses by Nature [abstract] |  |  |  |  |  |
Salaries, wages and other compensations | 1,063,760 |  | 1,119,353 |  | 1,242,364 |
Social security taxes | 175,402 |  | 250,317 |  | 240,539 |
Compensation to Directors and Supervisory Committee | 63,755 |  | 60,436 |  | 66,843 |
Professional services fees | 401,145 |  | 363,937 |  | 384,210 |
Technical operator assistance fees | 0 |  | 0 |  | 0 |
Materials | 0 |  | 0 |  | 0 |
Third parties services | 40,308 |  | 29,117 |  | 50,315 |
Telecommunications and post expenses | 25,036 |  | 31,373 |  | 49,219 |
Rents | 7,985 |  | 13,822 |  | 18,264 |
Transports and freight | 3,959 |  | 3,879 |  | 5,004 |
Easements | 0 |  | 0 |  | 0 |
Offices supplies | 7,604 |  | 6,654 |  | 10,650 |
Travels expenses | 11,483 |  | 22,809 |  | 56,182 |
Insurance | 30,280 |  | 27,112 |  | 13,133 |
Property, plant and equipment maintenance | 41,917 |  | 48,896 |  | 72,995 |
Depreciation of property, plant and equipment | 656,696 |  | 514,053 |  | 319,661 |
Taxes and contributions | 16,636 |  | 1,929 |  | 8,021 |
Advertising | 0 |  | 0 |  | 0 |
Doubtful accounts | 0 |  | 0 |  | 0 |
Banks expenses | 11,982 |  | 35,824 |  | 39,677 |
Interests expense | 0 |  | 0 |  | 0 |
Foreign exchange loss | 0 |  | 0 |  | 0 |
Capitalized financial costs |  |  | 0 |  | 0 |
Costs of services rendered to third parties | 0 |  | 0 |  | 0 |
Other expenses | 6,858 |  | 10,523 |  | 12,749 |
Total | 2,564,806 |  | 2,540,034 |  | 2,589,826 |
Selling Expenses [Member] |  |  |  |  |  |
Expenses by Nature [abstract] |  |  |  |  |  |
Salaries, wages and other compensations | 324,256 |  | 347,211 |  | 354,237 |
Social security taxes | 74,619 |  | 75,219 |  | 73,856 |
Compensation to Directors and Supervisory Committee | 0 |  | 0 |  | 0 |
Professional services fees | 20,717 |  | 41,295 |  | 66,019 |
Technical operator assistance fees | 0 |  | 0 |  | 0 |
Materials | 24 |  | 0 |  | 0 |
Third parties services | 0 |  | 847 |  | 17,434 |
Telecommunications and post expenses | 4,695 |  | 4,187 |  | 3,709 |
Rents | 454 |  | 1,146 |  | 2,080 |
Transports and freight | 173 |  | 0 |  | 0 |
Easements | 0 |  | 0 |  | 0 |
Offices supplies | 881 |  | 412 |  | 3,740 |
Travels expenses | 2,559 |  | 3,807 |  | 7,629 |
Insurance | 0 |  | 21 |  | 9,855 |
Property, plant and equipment maintenance | 0 |  | 0 |  | 0 |
Depreciation of property, plant and equipment | 0 |  | 0 |  | 0 |
Taxes and contributions | 4,372,129 | [1] | 3,728,699 | [2] | 5,510,327 | [3]
Advertising | 53,158 |  | 129,805 |  | 185,225 |
Doubtful accounts | (66,591) |  | 143,496 |  | 5,004 |
Banks expenses | 0 |  | 0 |  | 0 |
Interests expense | 0 |  | 0 |  | 0 |
Foreign exchange loss | 0 |  | 0 |  | 0 |
Capitalized financial costs |  |  | 0 |  | 0 |
Costs of services rendered to third parties | 0 |  | 0 |  | 0 |
Other expenses | 7,531 |  | 3,416 |  | 6,958 |
Total | 4,794,605 |  | 4,479,561 |  | 6,246,073 |
Financial Expenses [Member] |  |  |  |  |  |
Expenses by Nature [abstract] |  |  |  |  |  |
Salaries, wages and other compensations | 0 |  | 0 |  | 0 |
Social security taxes | 0 |  | 0 |  | 0 |
Compensation to Directors and Supervisory Committee | 0 |  | 0 |  | 0 |
Professional services fees | 0 |  | 0 |  | 0 |
Technical operator assistance fees | 0 |  | 0 |  | 0 |
Materials | 0 |  | 0 |  | 0 |
Third parties services | 0 |  | 0 |  | 0 |
Telecommunications and post expenses | 0 |  | 0 |  | 0 |
Rents | 0 |  | 0 |  | 0 |
Transports and freight | 0 |  | 0 |  | 0 |
Easements | 0 |  | 0 |  | 0 |
Offices supplies | 0 |  | 0 |  | 0 |
Travels expenses | 0 |  | 0 |  | 0 |
Insurance | 0 |  | 0 |  | 0 |
Property, plant and equipment maintenance | 0 |  | 0 |  | 0 |
Depreciation of property, plant and equipment | 0 |  | 0 |  | 0 |
Taxes and contributions | 0 |  | 0 |  | 0 |
Advertising | 0 |  | 0 |  | 0 |
Doubtful accounts | 0 |  | 0 |  | 0 |
Banks expenses | 0 |  | 0 |  | 0 |
Interests expense | 4,468,022 |  | 5,069,041 |  | 5,157,490 |
Foreign exchange loss | 12,443,627 |  | 22,393,825 |  | 32,131,915 |
Capitalized financial costs |  |  | 0 |  | (916,899) |
Costs of services rendered to third parties | 0 |  | 0 |  | 0 |
Other expenses | 0 |  | 0 |  | 0 |
Total | $ 16,911,649 |  | $ 27,462,866 |  | $ 36,372,506 |
[1] | Includes tax on exports for Ps. 1,575,910 for the year ended December 31, 2021.
[2] | Includes tax on exports of Ps. 635,724 for the year ended December 31, 2020.
[3] | Includes tax on exports for Ps. 1,733,163 for the year ended December 31, 2019.

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Balance Type: | debit
Period Type: | duration

X
- Definition A class of employee benefits expense that represents wages and salaries. [Refer: Employee benefits expense] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 19 -IssueDate 2021-01-01 -Paragraph 9 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=19&code=ifrs-tx-2021-en-r&anchor=para_9&doctype=Standard -URIDate 2021-03-24 + Details
Name: | ifrs-full_WagesAndSalaries
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Adjustments for doubtful accounts to reconcile profit (loss) to net cash flow from (used in) operating activities. + References No definition available. + Details
Name: | tgs_AdjustmentsForDoubtfulAccounts
Namespace Prefix: | tgs_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The amount of expense arising from costs of services rendered to third parties. + References No definition available. + Details
Name: | tgs_CostsOfServicesRenderedToThirdParties
Namespace Prefix: | tgs_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition The amount of expense arising from easements. + References No definition available. + Details
Name: | tgs_EasementsExpense
Namespace Prefix: | tgs_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition The amount of expense arising from office supplies. + References No definition available. + Details
Name: | tgs_OfficesSupplies
Namespace Prefix: | tgs_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The amount of social security taxes expense. + References No definition available. + Details
Name: | tgs_SocialSecurityTaxes
Namespace Prefix: | tgs_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition The amount of tax expense on exports. + References No definition available. + Details
Name: | tgs_TaxOnExports
Namespace Prefix: | tgs_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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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_OperatingExpensesRegulatedActivitiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

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

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

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