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SIGNIFICANT ACCOUNTING POLICIES, Consolidation and Regulatory Framework (Details) | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Regulatory framework [Abstract] |  |  |  |
Inflation rate |  | 36.14% | 53.83% | 47.64%
Telcosur [Member] |  |  |  |
Subsidiary [Abstract] |  |  |  |
Company |  | Telcosur |  |
Shareholding and votes |  | 99.98% |  |
Country |  | Argentina |  |
Closing date |  | December 31 |  |
Main activity |  | Telecommunication services |  |
CTG [Member] |  |  |  |
Subsidiary [Abstract] |  |  |  |
Company | [1] | CTG |  |
Shareholding and votes | [1] | 100.00% |  |
Country | [1] | Argentina |  |
Closing date | [1] | December 31 |  |
Main activity | [1] | Electricity related services |  |
TGU [Member] |  |  |  |
Associates [Abstract] |  |  |  |
Company |  | TGU |  |
Shareholding and voting |  | 49.00% |  |
Country |  | Uruguay |  |
Main activity |  | Pipeline maintenance |  |
Closing date |  | December 31 |  |
EGS [Member] |  |  |  |
Associates [Abstract] |  |  |  |
Company |  | EGS (“in liquidation”) |  |
Shareholding and voting |  | 49.00% |  |
Country |  | Argentina |  |
Main activity |  | Pipeline exploitation and construction |  |
Closing date |  | December 31 |  |
Link [Member] |  |  |  |
Associates [Abstract] |  |  |  |
Company |  | Link |  |
Shareholding and voting |  | 49.00% |  |
Country |  | Argentina |  |
Main activity |  | Pipeline exploitation and construction |  |
Closing date |  | December 31 |  |
[1] | 100% of the shares of this company were acquired on August 8, 2017. At present, it is in the process of being transformed into S.A.U..

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