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DETAIL OF SIGNIFICANT STATEMENT OF FINANCIAL POSITION AND STATEMENT OF COMPREHENSIVE INCOME CAPTIONS, Other Financial Assets at Amortized Cost (Details) - ARS ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Current [Abstract]
VRD bonds	$ 3,355	$ 8,790
US Treasury Bills	1,040,605	0
Total	1,043,960	8,790
Non Current [Abstract]
VRD bonds	5,403	13,476
US Treasury Bills	0	0
Total	$ 5,403	$ 13,476

X

- Definition

The amount of current financial assets measured at amortised cost. [Refer: Financial assets at amortised cost]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 7
-IssueDate 2019-01-01
-Paragraph 8
-Subparagraph f
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2019-en-r&anchor=para_8_f&doctype=Standard
-URIDate 2019-03-27

+ Details

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X

- Definition

The amount of non-current financial assets measured at amortised cost. [Refer: Financial assets at amortised cost]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 7
-IssueDate 2019-01-01
-Paragraph 8
-Subparagraph f
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2019-en-r&anchor=para_8_f&doctype=Standard
-URIDate 2019-03-27

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- References

No definition available.

+ Details

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X

- Definition

Refers to amount of current VRD bonds held by the entity.

+ References

No definition available.

+ Details

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- References

No definition available.

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- Definition

Refers to amount of non-current VRD bonds held by the entity.

+ References

No definition available.

+ Details

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- Definition

Refers to amount of US treasury bills held by the entity.

+ References

No definition available.

+ Details

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- Definition

Refers to amount of non current US treasury bills held by the entity.

+ References

No definition available.

+ Details

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Namespace Prefix:	tgs_
Data Type:	xbrli:monetaryItemType
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