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SIGNIFICANT ACCOUNTING POLICIES, Regulatory Framework (Details)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Regulatory framework [Abstract]
Inflation rate	50.94%	36.14%	53.83%

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- Definition

The quantitative measure of the rate at which the average price level of a basket of selected goods and services in an economy increases over a period of time.

+ References

No definition available.

+ Details

Name:	tgs_InflationRatePercentage
Namespace Prefix:	tgs_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

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- References

No definition available.

+ Details

Name:	tgs_RegulatoryFrameworksAbstract
Namespace Prefix:	tgs_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration