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Summary of significant accounting policies (Details 3) - Argentina Consumer Price [Member] | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Statement [Line Items] |  |  |
Level of price index | 384.01 | 284.14 | 284.14
Price index movements | 35.5 | 54.2 | 54.2

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- Definition The value of the level of the general price index used to restate financial statement information of an entity whose functional currency is the currency of a hyperinflationary economy. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 29 -IssueDate 2020-01-01 -Paragraph 39 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=29&code=ifrs-tx-2020-en-r&anchor=para_39_c&doctype=Standard -URIDate 2020-01-01 + Details
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- Definition The movements in the general price index used to restate financial statement information of an entity whose functional currency is the currency of a hyperinflationary economy. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 29 -IssueDate 2020-01-01 -Paragraph 39 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=29&code=ifrs-tx-2020-en-r&anchor=para_39_c&doctype=Standard -URIDate 2020-01-01 + Details
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