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5 Financial risk management (Details 1) - ARS ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019
Summary of financial risk management [line items] |  |
Net position assets/(liabilities) | $ (8,142) | $ (10,911)
US dollar |  |
Summary of financial risk management [line items] |  |
Net position assets/(liabilities) | (8,187) | (10,851)
Japanese Yen (JPY) |  |
Summary of financial risk management [line items] |  |
Net position assets/(liabilities) | 45 |
Euro |  |
Summary of financial risk management [line items] |  |
Net position assets/(liabilities) |  | (38)
Norwegian krone (NOK) |  |
Summary of financial risk management [line items] |  |
Net position assets/(liabilities) |  | (1)
Swiss franc (CHF) |  |
Summary of financial risk management [line items] |  |
Net position assets/(liabilities) |  | $ (21)

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