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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, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Expenses by Nature [abstract] |  |  |  |  |  |
Salaries, wages and other compensations | $ 104,700,571 |  | $ 101,747,855 |  | $ 90,170,902 |
Social security taxes | 17,891,233 |  | 16,846,649 |  | 17,097,872 |
Compensation to Directors and Supervisory Committee | 870,724 |  | 886,376 |  | 853,749 |
Professional services fees | 21,736,846 |  | 16,165,302 |  | 11,150,476 |
Technical operator assistance fees | 26,405,660 |  | 13,236,442 |  | 20,799,669 |
Materials | 18,419,298 |  | 16,746,025 |  | 10,814,079 |
Third parties services | 11,300,606 |  | 10,388,995 |  | 10,602,306 |
Telecommunications and post expenses | 926,278 |  | 471,054 |  | 572,636 |
Rents | 3,658,382 |  | 2,865,153 |  | 739,033 |
Transports and freight | 4,923,703 |  | 4,895,486 |  | 4,162,758 |
Easements | 1,198,369 |  | 1,745,754 |  | 1,362,741 |
Offices supplies | 351,057 |  | 558,629 |  | 318,342 |
Travel expenses | 2,829,403 |  | 2,094,139 |  | 1,343,232 |
Insurance | 3,636,825 |  | 4,619,418 |  | 4,663,808 |
Property, plant and equipment maintenance | 54,502,994 |  | 44,148,962 |  | 43,835,696 |
Depreciation of property, plant and equipment | 129,666,014 |  | 132,025,049 |  | 132,728,649 |
Taxes and contributions | 76,235,531 |  | 67,640,284 |  | 73,631,657 |
Advertising | 2,199,517 |  | 1,926,424 |  | 1,282,288 |
Doubtful accounts | 0 |  | 371,535 |  | 0 |
Banks expenses | 1,151,980 |  | 362,829 |  | 673,698 |
Interests expense | 55,710,108 |  | 53,629,953 |  | 46,102,674 |
Foreign exchange loss | 151,769,496 |  | 1,043,252,045 |  | 353,347,594 |
Costs of services rendered to third parties |  |  |  |  | 331,756 |
Other expenses | 3,050,993 |  | 3,616,045 |  | 2,972,236 |
Total | 693,135,588 |  | 1,540,240,403 |  | 829,557,851 |
Tax on exports | 23,126,803 |  | 17,933,982 |  | 24,815,929 |
Operating Expenses, Regulated Activities [Member] |  |  |  |  |  |
Expenses by Nature [abstract] |  |  |  |  |  |
Salaries, wages and other compensations | 43,704,634 |  | 41,314,446 |  | 37,867,629 |
Social security taxes | 7,297,207 |  | 7,071,046 |  | 7,012,285 |
Compensation to Directors and Supervisory Committee | 0 |  | 0 |  | 0 |
Professional services fees | 2,235,743 |  | 973,987 |  | 332,096 |
Technical operator assistance fees | 10,027,335 |  | 520,020 |  | 1,903,579 |
Materials | 6,385,319 |  | 4,570,168 |  | 3,137,530 |
Third parties services | 4,285,078 |  | 5,088,025 |  | 4,607,680 |
Telecommunications and post expenses | 246,251 |  | 100,411 |  | 109,370 |
Rents | 464,134 |  | 342,368 |  | 119,208 |
Transports and freight | 2,854,337 |  | 3,009,188 |  | 2,367,578 |
Easements | 1,198,369 |  | 1,745,754 |  | 1,062,811 |
Offices supplies | 134,685 |  | 274,003 |  | 125,780 |
Travel expenses | 1,186,035 |  | 1,065,478 |  | 693,987 |
Insurance | 1,958,089 |  | 2,714,219 |  | 2,705,497 |
Property, plant and equipment maintenance | 39,301,897 |  | 32,648,194 |  | 34,660,631 |
Depreciation of property, plant and equipment | 81,833,041 |  | 81,879,189 |  | 89,416,777 |
Taxes and contributions | 10,013,006 |  | 13,054,980 |  | 12,114,336 |
Advertising | 0 |  | 0 |  | 0 |
Doubtful accounts |  |  | 0 |  |  |
Banks expenses | 0 |  | 0 |  | 0 |
Interests expense | 0 |  | 0 |  | 0 |
Foreign exchange loss | 0 |  | 0 |  | 0 |
Costs of services rendered to third parties |  |  |  |  | 0 |
Other expenses | 983,811 |  | 1,286,802 |  | 843,242 |
Total | 214,108,971 |  | 197,658,278 |  | 199,080,016 |
Operating Expenses, Non-regulated Activities [Member] |  |  |  |  |  |
Expenses by Nature [abstract] |  |  |  |  |  |
Salaries, wages and other compensations | 36,297,210 |  | 34,253,912 |  | 30,715,209 |
Social security taxes | 6,424,722 |  | 6,103,677 |  | 6,039,652 |
Compensation to Directors and Supervisory Committee | 0 |  | 0 |  | 0 |
Professional services fees | 2,453,653 |  | 1,736,401 |  | 4,073,075 |
Technical operator assistance fees | 16,378,325 |  | 12,716,422 |  | 18,896,090 |
Materials | 12,026,592 |  | 12,175,857 |  | 7,668,398 |
Third parties services | 6,231,082 |  | 4,893,423 |  | 4,670,503 |
Telecommunications and post expenses | 328,570 |  | 188,660 |  | 180,539 |
Rents | 3,089,368 |  | 2,440,150 |  | 547,747 |
Transports and freight | 1,978,635 |  | 1,815,559 |  | 1,711,315 |
Easements | 0 |  | 0 |  | 299,930 |
Offices supplies | 65,222 |  | 107,231 |  | 65,087 |
Travel expenses | 447,228 |  | 498,646 |  | 237,963 |
Insurance | 1,664,758 |  | 1,617,705 |  | 1,609,012 |
Property, plant and equipment maintenance | 13,439,683 |  | 10,546,094 |  | 8,641,429 |
Depreciation of property, plant and equipment | 43,825,468 |  | 43,351,103 |  | 35,176,127 |
Taxes and contributions | 344,159 |  | 372,968 |  | 412,882 |
Advertising | 116 |  | 514 |  | 0 |
Doubtful accounts |  |  | 0 |  |  |
Banks expenses | 0 |  | 0 |  | 0 |
Interests expense | 0 |  | 0 |  | 0 |
Foreign exchange loss | 0 |  | 0 |  | 0 |
Costs of services rendered to third parties |  |  |  |  | 331,756 |
Other expenses | 1,884,762 |  | 2,111,654 |  | 1,534,252 |
Total | 146,879,553 |  | 134,929,976 |  | 122,810,966 |
Administrative Expenses [Member] |  |  |  |  |  |
Expenses by Nature [abstract] |  |  |  |  |  |
Salaries, wages and other compensations | 19,225,121 |  | 20,934,042 |  | 16,538,629 |
Social security taxes | 3,146,337 |  | 2,664,412 |  | 2,995,454 |
Compensation to Directors and Supervisory Committee | 870,724 |  | 886,376 |  | 853,749 |
Professional services fees | 14,621,232 |  | 9,867,393 |  | 6,092,554 |
Technical operator assistance fees | 0 |  | 0 |  | 0 |
Materials | 0 |  | 0 |  | 0 |
Third parties services | 784,446 |  | 407,547 |  | 1,324,123 |
Telecommunications and post expenses | 308,457 |  | 160,594 |  | 250,441 |
Rents | 95,646 |  | 78,208 |  | 65,460 |
Transports and freight | 90,731 |  | 70,717 |  | 81,328 |
Easements | 0 |  | 0 |  | 0 |
Offices supplies | 132,580 |  | 157,167 |  | 122,037 |
Travel expenses | 1,091,560 |  | 444,018 |  | 313,495 |
Insurance | 0 |  | 287,494 |  | 349,299 |
Property, plant and equipment maintenance | 1,761,264 |  | 954,674 |  | 533,636 |
Depreciation of property, plant and equipment | 4,007,505 |  | 6,794,757 |  | 8,135,745 |
Taxes and contributions | 113,762 |  | 438,809 |  | 200,789 |
Advertising | 0 |  | 0 |  | 0 |
Doubtful accounts |  |  | 0 |  |  |
Banks expenses | 1,151,980 |  | 362,829 |  | 673,698 |
Interests expense | 0 |  | 0 |  | 0 |
Foreign exchange loss | 0 |  | 0 |  | 0 |
Costs of services rendered to third parties |  |  |  |  | 0 |
Other expenses | 26,337 |  | 13,292 |  | 492,248 |
Total | 47,427,682 |  | 44,522,329 |  | 39,022,685 |
Selling Expenses [Member] |  |  |  |  |  |
Expenses by Nature [abstract] |  |  |  |  |  |
Salaries, wages and other compensations | 5,473,606 |  | 5,245,455 |  | 5,049,435 |
Social security taxes | 1,022,967 |  | 1,007,514 |  | 1,050,481 |
Compensation to Directors and Supervisory Committee | 0 |  | 0 |  | 0 |
Professional services fees | 2,426,218 |  | 3,587,521 |  | 652,751 |
Technical operator assistance fees | 0 |  | 0 |  | 0 |
Materials | 7,387 |  | 0 |  | 8,151 |
Third parties services | 0 |  | 0 |  | 0 |
Telecommunications and post expenses | 43,000 |  | 21,389 |  | 32,286 |
Rents | 9,234 |  | 4,427 |  | 6,618 |
Transports and freight | 0 |  | 22 |  | 2,537 |
Easements | 0 |  | 0 |  | 0 |
Offices supplies | 18,570 |  | 20,228 |  | 5,438 |
Travel expenses | 104,580 |  | 85,997 |  | 97,787 |
Insurance | 13,978 |  | 0 |  | 0 |
Property, plant and equipment maintenance | 150 |  | 0 |  | 0 |
Depreciation of property, plant and equipment | 0 |  | 0 |  | 0 |
Taxes and contributions | 65,764,604 | [1] | 53,773,527 | [2] | 60,903,650 | [3]
Advertising | 2,199,401 |  | 1,925,910 |  | 1,282,288 |
Doubtful accounts |  |  | 371,535 |  |  |
Banks expenses | 0 |  | 0 |  | 0 |
Interests expense | 0 |  | 0 |  | 0 |
Foreign exchange loss | 0 |  | 0 |  | 0 |
Costs of services rendered to third parties |  |  |  |  | 0 |
Other expenses | 156,083 |  | 204,297 |  | 102,494 |
Total | 77,239,778 |  | 66,247,822 |  | 69,193,916 |
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 |
Travel 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 |  |  |
Banks expenses | 0 |  | 0 |  | 0 |
Interests expense | 55,710,108 |  | 53,629,953 |  | 46,102,674 |
Foreign exchange loss | 151,769,496 |  | 1,043,252,045 |  | 353,347,594 |
Costs of services rendered to third parties |  |  |  |  | 0 |
Other expenses | 0 |  | 0 |  | 0 |
Total | $ 207,479,604 |  | $ 1,096,881,998 |  | $ 399,450,268 |
[1] | Includes tax on exports for Ps. 23,126,803 for the year ended December 31, 2024.
[2] | Includes tax on exports for Ps. 17,933,982 for the year ended December 31, 2023.
[3] | Includes tax on exports for Ps. 24,815,929 for the year ended December 31, 2022.

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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

X
- 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

X
- 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

X
- 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

X
- 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

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

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

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

X
- 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: |