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: |