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19. Trade payables (Details) - ARS ($) $ in Thousands | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | ---
SummaryOfTradePayablesLineItems [Line Items] |  |
Noncurrent | $ 286,217 | $ 355,706
Current | 14,608,977 | 13,577,520
Customer guarantees |  |
SummaryOfTradePayablesLineItems [Line Items] |  |
Noncurrent | 140,968 | 148,349
Customer contributions |  |
SummaryOfTradePayablesLineItems [Line Items] |  |
Noncurrent | 112,324 | 118,095
Current | 15,288 | 27,706
Funding contributions - substations |  |
SummaryOfTradePayablesLineItems [Line Items] |  |
Noncurrent | 32,925 | 89,262
Current | 17,215 | 12,380
Payables for purchase of electricity |  |
SummaryOfTradePayablesLineItems [Line Items] |  |
Current | 4,080,310 | 4,499,302
Provision for unbilled electricity purchases |  |
SummaryOfTradePayablesLineItems [Line Items] |  |
Current | 7,828,458 | 6,715,431
Suppliers |  |
SummaryOfTradePayablesLineItems [Line Items] |  |
Current | 2,426,016 | 1,995,697
Advance to customer |  |
SummaryOfTradePayablesLineItems [Line Items] |  |
Current | 196,485 | 220,111
Discounts to customers |  |
SummaryOfTradePayablesLineItems [Line Items] |  |
Current | 37,372 | 55,182
Related parties |  |
SummaryOfTradePayablesLineItems [Line Items] |  |
Current | $ 7,833 | $ 51,711

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