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INVESTMENT IN ASSOCIATES (Tables) | 12 Months Ended
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Dec. 31, 2017
INVESTMENT IN ASSOCIATES [Abstract] |
Investment in Associates |
|  | 2017 |  |  | 2016 |
|  | Cost value |  |  | Book value |  |  | Book value |
Emprendimientos de Gas del Sur S.A. (in liquidation) ("EGS") |  |  | 116 |  |  |  | 367 |  |  |  | 357 |
Transporte y Servicios de Gas en Uruguay S.A. ("TGU") |  |  | 5 |  |  |  | 2,698 |  |  |  | 2,517 |
Subtotal |  |  | 121 |  |  |  | 3,065 |  |  |  | 2,874 |
Gas Link S.A. ("Link") |  |  | 503 |  |  |  | - |  |  |  | - |
Total |  |  | 624 |  |  |  | 3,065 |  |  |  | 2,874 |

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