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CONSOLIDATED BUSINESS SEGMENT INFORMATION (Details) $ in Thousands | 12 Months Ended
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Dec. 31, 2017 ARS ($) segment Pipeline | Dec. 31, 2016 ARS ($) | Dec. 31, 2015 ARS ($)
Operating segments [Abstract] |  |  |  |  |  |
Revenues from sales | $ 12,246,664 |  | $ 7,402,172 |  | $ 4,226,569 |
Cost of sales | (6,523,317) |  | (4,435,915) |  | (2,759,905) |
Administrative expenses | (402,995) |  | (315,379) |  | (201,636) |
Selling expenses | (499,909) |  | (353,514) |  | (241,330) |
Other operating (expenses) / income | (104,377) |  | (65,543) |  | (335,451) |
Operating profit | 4,716,066 |  | 2,231,821 |  | 688,247 |
Depreciation of property, plant and equipment | (358,420) |  | (286,798) |  | (261,393) |
Identifiable assets | 13,666,900 |  | 8,931,332 |  | 6,646,577 |
Identifiable liabilities | 8,347,260 |  | 6,404,954 |  | 4,951,143 |
External Market [Member] |  |  |  |  |  |
Operating segments [Abstract] |  |  |  |  |  |
Revenues from sales | 2,676,792 |  | 1,437,902 |  | 967,340 |
Local Market [Member] |  |  |  |  |  |
Operating segments [Abstract] |  |  |  |  |  |
Revenues from sales | $ 9,569,872 |  | 5,964,270 |  | 3,259,229 |
Reportable Segments [Member] |  |  |  |  |  |
Operating segments [Abstract] |  |  |  |  |  |
Number of reportable segments | segment | 4 |  |  |  |  |
Reportable Segments [Member] | Government Subsidies [Member] |  |  |  |  |  |
Operating segments [Abstract] |  |  |  |  |  |
Revenues from sales | $ 235,459 |  | 183,870 |  | 126,929 |
Reportable Segments [Member] | Natural Gas Transportation [Member] |  |  |  |  |  |
Operating segments [Abstract] |  |  |  |  |  |
Revenues from sales | 4,559,739 |  | 2,087,191 |  | 1,013,998 |
Cost of sales | (1,845,551) |  | (1,068,714) |  | (779,923) |
Administrative expenses | (316,627) |  | (264,821) |  | (172,667) |
Selling expenses | (260,313) |  | (121,189) |  | (48,082) |
Other operating (expenses) / income | (126,027) |  | (44,678) |  | (332,997) |
Operating profit | 2,161,609 |  | 658,868 |  | (298,236) |
Depreciation of property, plant and equipment | (245,600) |  | (238,844) |  | (194,659) |
Identifiable assets | 8,284,454 |  | 6,454,526 |  | 5,032,799 |
Identifiable liabilities | 5,991,730 |  | 4,209,833 |  | 4,095,216 |
Reportable Segments [Member] | Natural Gas Transportation [Member] | External Market [Member] |  |  |  |  |  |
Operating segments [Abstract] |  |  |  |  |  |
Revenues from sales | 0 |  | 0 |  | 0 |
Reportable Segments [Member] | Natural Gas Transportation [Member] | Local Market [Member] |  |  |  |  |  |
Operating segments [Abstract] |  |  |  |  |  |
Revenues from sales | $ 4,559,739 |  | 2,087,191 |  | 1,013,998 |
Reportable Segments [Member] | Production and Commercialization of Liquids [Member] |  |  |  |  |  |
Operating segments [Abstract] |  |  |  |  |  |
Number of pipelines | Pipeline | 3 |  |  |  |  |
Revenues from sales | $ 6,875,241 | [1] | 4,768,326 | [2] | 2,907,770 | [3]
Cost of sales | (4,428,764) |  | (3,218,936) |  | (1,869,397) |
Administrative expenses | (59,249) |  | (32,535) |  | (16,512) |
Selling expenses | (163,746) |  | (180,499) |  | (155,747) |
Other operating (expenses) / income | 27,253 |  | (19,147) |  | (2,663) |
Operating profit | 2,250,735 |  | 1,317,209 |  | 863,451 |
Depreciation of property, plant and equipment | (20,170) |  | (16,693) |  | (49,651) |
Identifiable assets | 3,911,169 |  | 1,184,593 |  | 1,237,732 |
Identifiable liabilities | 1,217,863 |  | 1,214,944 |  | 625,023 |
Reportable Segments [Member] | Production and Commercialization of Liquids [Member] | External Market [Member] |  |  |  |  |  |
Operating segments [Abstract] |  |  |  |  |  |
Revenues from sales | 2,676,792 |  | 1,437,902 |  | 967,340 |
Reportable Segments [Member] | Production and Commercialization of Liquids [Member] | Local Market [Member] |  |  |  |  |  |
Operating segments [Abstract] |  |  |  |  |  |
Revenues from sales | 4,198,449 |  | 3,330,424 |  | 1,940,430 |
Reportable Segments [Member] | Other Services [Member] |  |  |  |  |  |
Operating segments [Abstract] |  |  |  |  |  |
Revenues from sales | 735,839 |  | 485,855 |  | 260,600 |
Cost of sales | (353,676) |  | (187,815) |  | (108,617) |
Administrative expenses | (22,984) |  | (14,734) |  | (9,985) |
Selling expenses | (66,306) |  | (44,286) |  | (32,889) |
Other operating (expenses) / income | (5,758) |  | (1,261) |  | 191 |
Operating profit | 287,115 |  | 237,759 |  | 109,300 |
Depreciation of property, plant and equipment | (92,650) |  | (31,261) |  | (17,083) |
Identifiable assets | 1,410,054 |  | 1,235,079 |  | 310,441 |
Identifiable liabilities | 1,120,469 |  | 968,527 |  | 196,031 |
Reportable Segments [Member] | Other Services [Member] | External Market [Member] |  |  |  |  |  |
Operating segments [Abstract] |  |  |  |  |  |
Revenues from sales | 0 |  | 0 |  | 0 |
Reportable Segments [Member] | Other Services [Member] | Local Market [Member] |  |  |  |  |  |
Operating segments [Abstract] |  |  |  |  |  |
Revenues from sales | 735,839 |  | 485,855 |  | 260,600 |
Reportable Segments [Member] | Telecommunications [Member] |  |  |  |  |  |
Operating segments [Abstract] |  |  |  |  |  |
Revenues from sales | 75,845 |  | 60,800 |  | 44,201 |
Cost of sales | (45,714) |  | (31,529) |  | (23,403) |
Administrative expenses | (4,135) |  | (3,289) |  | (2,472) |
Selling expenses | (9,544) |  | (7,540) |  | (4,612) |
Other operating (expenses) / income | 155 |  | (457) |  | 18 |
Operating profit | 16,607 |  | 17,985 |  | 13,732 |
Depreciation of property, plant and equipment | 0 |  | 0 |  | 0 |
Identifiable assets | 61,223 |  | 57,134 |  | 65,605 |
Identifiable liabilities | 17,198 |  | 11,650 |  | 34,873 |
Reportable Segments [Member] | Telecommunications [Member] | External Market [Member] |  |  |  |  |  |
Operating segments [Abstract] |  |  |  |  |  |
Revenues from sales | 0 |  | 0 |  | 0 |
Reportable Segments [Member] | Telecommunications [Member] | Local Market [Member] |  |  |  |  |  |
Operating segments [Abstract] |  |  |  |  |  |
Revenues from sales | 75,845 |  | 60,800 |  | 44,201 |
Eliminations [Member] |  |  |  |  |  |
Operating segments [Abstract] |  |  |  |  |  |
Revenues from sales | (150,388) |  | (71,079) |  | (21,435) |
Cost of sales | 150,388 |  | 71,079 |  | 21,435 |
Administrative expenses | 0 |  | 0 |  | 0 |
Selling expenses | 0 |  | 0 |  | 0 |
Other operating (expenses) / income | 0 |  | 0 |  | 0 |
Operating profit | 0 |  | 0 |  | 0 |
Depreciation of property, plant and equipment | 0 |  | 0 |  | 0 |
Identifiable assets | 0 |  | 0 |  | 0 |
Identifiable liabilities | 0 |  | 0 |  | 0 |
Eliminations [Member] | External Market [Member] |  |  |  |  |  |
Operating segments [Abstract] |  |  |  |  |  |
Revenues from sales | 0 |  | 0 |  | 0 |
Eliminations [Member] | Local Market [Member] |  |  |  |  |  |
Operating segments [Abstract] |  |  |  |  |  |
Revenues from sales | 0 |  | 0 |  | 0 |
Eliminations [Member] | Natural Gas Transportation [Member] |  |  |  |  |  |
Operating segments [Abstract] |  |  |  |  |  |
Revenues from sales | 150,388 |  | 71,079 |  | 21,435 |
Eliminations [Member] | Production and Commercialization of Liquids [Member] |  |  |  |  |  |
Operating segments [Abstract] |  |  |  |  |  |
Revenues from sales | 0 |  | 0 |  | 0 |
Eliminations [Member] | Other Services [Member] |  |  |  |  |  |
Operating segments [Abstract] |  |  |  |  |  |
Revenues from sales | 0 |  | 0 |  | 0 |
Eliminations [Member] | Telecommunications [Member] |  |  |  |  |  |
Operating segments [Abstract] |  |  |  |  |  |
Revenues from sales | $ 0 |  | $ 0 |  | $ 0 |
[1] | Revenues from sales from Production and Commercialization of Liquids segment includes Ps. 235,459 of Government subsidies.
[2] | Revenues from sales from Production and Commercialization of Liquids segment includes Ps. 183,870 of National Government subsidies.
[3] | Revenues from sales from Production and Commercialization of Liquids segment includes Ps. 126,929 of Government subsidies.

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