XML 101 R84.htm IDEA: XBRL DOCUMENT v3.8.0.1

FINANCIAL RISK MANAGEMENT, Credit Risk, Cash and Financial Placements (Details) - ARS ($) $ in Thousands		Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
External credit grades [Abstract]
Cash and cash equivalents		$ 2,652,803	$ 1,555,089	$ 872,537	$ 789,420
Mutual Funds [Member] | AA Rating [Member]
External credit grades [Abstract]
Cash and cash equivalents		899,570
Mutual Funds [Member] | A Rating [Member]
External credit grades [Abstract]
Cash and cash equivalents		183,315
Mutual Funds [Member] | BBB Rating [Member]
External credit grades [Abstract]
Cash and cash equivalents		75,817
Mutual Funds [Member] | AA- Rating [Member]
External credit grades [Abstract]
Cash and cash equivalents		143,531
Mutual Funds [Member] | B Rating [Member]
External credit grades [Abstract]
Cash and cash equivalents		25,741
Public Bonds [Member] | B Rating [Member]
External credit grades [Abstract]
Cash and cash equivalents	[1]	$ 1,586,447
[1] Includes BONAR 2020, Letes and Lebacs

X

- Definition

The amount of cash on hand and demand deposits, along with short-term, highly liquid investments that are readily convertible to known amounts of cash and that are subject to an insignificant risk of changes in value. [Refer: Cash; Cash equivalents]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 7
-IssueDate 2017-01-01
-Paragraph 45
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=7&date=2017-03-01&anchor=para_45&doctype=Standard
-URIDate 2017-03-09

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 12
-IssueDate 2017-01-01
-Paragraph B13
-Subparagraph a
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=12&date=2017-03-01&anchor=para_B13_a&doctype=Appendix&seq=2
-URIDate 2017-03-09

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 1
-IssueDate 2017-01-01
-Paragraph 54
-Subparagraph i
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_54_i&doctype=Standard
-URIDate 2017-03-09

+ Details

Name:	ifrs-full_CashAndCashEquivalents
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- References

No definition available.

+ Details

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

X

- Details

Name:	ifrs-full_ClassesOfFinancialAssetsAxis=tgs_MutualFundsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_ExternalCreditGradesAxis=tgs_AARatingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_ExternalCreditGradesAxis=tgs_ARatingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_ExternalCreditGradesAxis=tgs_BBBRatingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_ExternalCreditGradesAxis=tgs_AANegativeRatingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_ExternalCreditGradesAxis=tgs_BRatingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_ClassesOfFinancialAssetsAxis=tgs_PublicBondsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: