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DETAIL OF SIGNIFICANT STATEMENT OF FINANCIAL POSITION AND STATEMENT OF COMPREHENSIVE INCOME CAPTIONS, Trade Receivables (Details) - ARS ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016
Current [Abstract] |  |  |  |  |
Ordinary |  | $ 2,008,861 |  | $ 1,128,454 |
Related parties |  | 24,679 |  | 117,688 |
Allowance for doubtful accounts |  | 0 |  | (19,703) |
Total |  | 2,033,540 |  | 1,226,439 |
Non-current [Abstract] |  |  |  |  |
Ordinary |  | 3,055 |  | 8,122 |
Related parties |  | 0 |  |  |
Allowance for doubtful accounts |  | 0 |  | 0 |
Total |  | 3,055 |  | 8,122 |
Allowance for doubtful accounts [Abstract] |  |  |  |  |
Balance at the beginning of the period |  | 19,703 | [1] | 1,389 |
Additions |  | 0 |  | 19,703 | [2]
Applications |  | 0 |  | (1,389) |
Reversals |  | (19,703) | [2] | 0 |
Balance at the end of period | [1] | 0 |  | 19,703 |
Natural Gas Transportation [Member] |  |  |  |  |
Current [Abstract] |  |  |  |  |
Ordinary |  | 890,370 |  | 405,388 |
Related parties |  | 9,687 |  | 5,544 |
Non-current [Abstract] |  |  |  |  |
Ordinary |  | 0 |  | 0 |
Related parties |  | 0 |  | 0 |
Production and Commercialization of Liquids [Member] |  |  |  |  |
Current [Abstract] |  |  |  |  |
Ordinary |  | 909,065 |  | 550,596 |
Non-current [Abstract] |  |  |  |  |
Ordinary |  | 0 |  | 0 |
Other Services [Member] |  |  |  |  |
Current [Abstract] |  |  |  |  |
Ordinary |  | 209,426 |  | 172,470 |
Related parties |  | 14,992 |  | 112,144 |
Non-current [Abstract] |  |  |  |  |
Ordinary |  | 3,055 |  | 8,122 |
Related parties |  | 0 |  | 0 |
Argentine Pesos [Member] |  |  |  |  |
Current [Abstract] |  |  |  |  |
Total |  | 960,693 |  | 568,500 |
Non-current [Abstract] |  |  |  |  |
Total |  | 0 |  | 0 |
U.S. Dollars [Member] |  |  |  |  |
Current [Abstract] |  |  |  |  |
Total |  | 1,072,847 |  | 657,939 |
Non-current [Abstract] |  |  |  |  |
Total |  | $ 3,055 |  | $ 8,122 |
[1] | Corresponds to the best estimate made by TGS according to what is mentioned in note 5.b.
[2] | The total amount is recorded in Selling Expenses

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