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SIGNIFICANT ACCOUNTING POLICIES - Consolidation of structured entities (Details) - Adesol - Call Option Agreement of Adesol $ in Millions |  |  |  |  | 12 Months Ended
--- | --- | --- | --- | --- | ---
Jan. 16, 2018 ARS ($) | Dec. 30, 2017 | Dec. 28, 2017 USD ($) | Dec. 28, 2017 ARS ($) | Dec. 22, 2016 ARS ($) | Dec. 31, 2018 ARS ($)
Disclosure of Detailed Information About Significant Accounting Policies [line items] |  |  |  |  |  |
Purchase price of call option |  |  | $ 5,011,747 | $ 45 | $ 128 |
Extension period of call option |  |  | 2 years | 2 years |  |
Period available for payment of supplement to option premium |  | 10 days |  |  |  |
Supplement option premium payable |  |  | $ 4,500,000 |  | $ 45 | $ 83
Period available for grantor for returning of premium after expiration |  |  | 10 days | 10 days |  |
Supplement option premium receivable after expiration of call option |  |  | $ 2,500,000 |  |  |
Other deferred |  |  |  |  |  |
Disclosure of Detailed Information About Significant Accounting Policies [line items] |  |  |  |  |  |
Supplemental option premium paid | $ 91 |  |  |  |  | $ 132

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