XML 99 R82.htm IDEA: XBRL DOCUMENT
v3.8.0.1

FINANCIAL RISK MANAGEMENT, Commodity Price Risk (Details) - Commodity Price Risk [Member] $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2017 ARS ($) $ / Ton | Dec. 31, 2016 ARS ($) $ / Ton | Dec. 31, 2015 ARS ($) $ / Ton
Commodity Rate Risk [Abstract] |  |  |
Increase (decrease) in international price of LPG and natural gasoline | $ / Ton | 50 | 50 | 50
Liquids Production and Commercialization [Member] |  |  |
Commodity Rate Risk [Abstract] |  |  |
Decrease in net comprehensive income due to commodity risk | $ | $ 304,254 | $ 233,323 | $ 157,051

X
- Definition The amount of decrease in net comprehensive income due to commodity risk. + References No definition available. + Details
Name: | tgs_DecreaseInNetComprehensiveIncomeDueToCommodityRisk
Namespace Prefix: | tgs_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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

X
- Definition Refers to decrease in the international price of LPG and natural gasoline per unit. + References No definition available. + Details
Name: | tgs_IncreaseDecreaseInInternationalPriceOfLPGAndNaturalGasoline
Namespace Prefix: | tgs_
Data Type: | us-types:perUnitItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | ifrs-full_TypesOfRisksAxis=ifrs-full_CommodityPriceRiskMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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