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5 Financial risk management (Details 6) - ARS ($) $ in Millions | Dec. 31, 2020 | Dec. 31, 2019
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Summary of financial risk management [line items] |  |
Assets | $ 4,946 | $ 4,138
Liabilities | 1 | 279
Derivative financial instruments [member] |  |
Summary of financial risk management [line items] |  |
Liabilities | 1 | 279
Level 1 [member] |  |
Summary of financial risk management [line items] |  |
Assets | 4,946 | 4,138
Liabilities |  |
Level 1 [member] | Derivative financial instruments [member] |  |
Summary of financial risk management [line items] |  |
Liabilities |  |
Level 2 [member] |  |
Summary of financial risk management [line items] |  |
Assets |  |
Liabilities | 1 | 279
Level 2 [member] | Derivative financial instruments [member] |  |
Summary of financial risk management [line items] |  |
Liabilities | 1 | 279
Money market funds [member] |  |
Summary of financial risk management [line items] |  |
Assets |  | 3,798
Money market funds [member] | Level 1 [member] |  |
Summary of financial risk management [line items] |  |
Assets |  | 3,798
Money market funds [member] | Level 2 [member] |  |
Summary of financial risk management [line items] |  |
Assets |  |
Government bonds [member] |  |
Summary of financial risk management [line items] |  |
Assets | 2,222 |
Government bonds [member] | Level 1 [member] |  |
Summary of financial risk management [line items] |  |
Assets | 2,222 |
Government bonds [member] | Level 2 [member] |  |
Summary of financial risk management [line items] |  |
Assets |  |
Money market funds [member] |  |
Summary of financial risk management [line items] |  |
Assets | 2,724 | 340
Money market funds [member] | Level 1 [member] |  |
Summary of financial risk management [line items] |  |
Assets | 2,724 | 340
Money market funds [member] | Level 2 [member] |  |
Summary of financial risk management [line items] |  |
Assets |  |

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- Definition The fair value of financial assets. [Refer: At fair value [member]; Financial assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2020-01-01 -Paragraph 25 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2020-en-r&anchor=para_25&doctype=Standard -URIDate 2020-01-01 + Details
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