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31. Revenue from sales (Details) - ARS ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
SummaryOfRevenueFromSalesLineItems [Line Items]
Revenue from sales	$ 89,943,794	$ 86,039,928	$ 60,897,330
Sales of electricity
SummaryOfRevenueFromSalesLineItems [Line Items]
Revenue from sales	89,573,118	85,633,978	60,477,324
Right of use on poles
SummaryOfRevenueFromSalesLineItems [Line Items]
Revenue from sales	283,459	292,732	326,400
Connection charges
SummaryOfRevenueFromSalesLineItems [Line Items]
Revenue from sales	60,898	78,584	75,915
Reconnection charges
SummaryOfRevenueFromSalesLineItems [Line Items]
Revenue from sales	$ 26,319	$ 34,634	$ 17,691

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Expiry date 2020-01-01: The income arising in the course of an entity's ordinary activities. Income is increases in economic benefits during the accounting period in the form of inflows or enhancements of assets or decreases of liabilities that result in an increase in equity, other than those relating to contributions from equity participants. Effective 2020-01-01: The income arising in the course of an entity's ordinary activities. Income is increases in assets, or decreases in liabilities, that result in increases in equity, other than those relating to contributions from holders of equity claims.

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