30. Revenue from sales (Details) - ARS ($) $ in Thousands	12 Months Ended
Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
SummaryOfRevenueFromSalesLineItems [Line Items]
Revenue from sales	$ 55,953,649	$ 39,602,868	$ 25,826,759
Sales of electricity
SummaryOfRevenueFromSalesLineItems [Line Items]
Revenue from sales	55,689,651	39,329,729	25,576,978
Right of use on poles
SummaryOfRevenueFromSalesLineItems [Line Items]
Revenue from sales	190,370	212,265	213,449
Connection charges
SummaryOfRevenueFromSalesLineItems [Line Items]
Revenue from sales	51,105	49,369	30,893
Reconnection charges
SummaryOfRevenueFromSalesLineItems [Line Items]
Revenue from sales	$ 22,523	$ 11,505	$ 5,439

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.

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+ Details