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SIGNIFICANT ACCOUNTING POLICIES - Receivables and payables valued at amortized cost (Details) | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019
Disclosure of Detailed Information About Significant Accounting Policies [line items] |  |
WACC | 10.89% |
ARS |  |
Disclosure of Detailed Information About Significant Accounting Policies [line items] |  |
WACC | 29.00% |
ARS | Minimum |  |
Disclosure of Detailed Information About Significant Accounting Policies [line items] |  |
WACC |  | 29.00%
ARS | Maximum |  |
Disclosure of Detailed Information About Significant Accounting Policies [line items] |  |
WACC |  | 40.00%
Guaranies |  |
Disclosure of Detailed Information About Significant Accounting Policies [line items] |  |
Discount rates of receivables | 12.40% | 11.85%

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