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Summary of significant accounting policies (Details 3) - Argentina Consumer Price [Member]	12 Months Ended
	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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- References

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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

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-IssueDate 2020-01-01
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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.

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