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22. Trade payables
12 Months Ended
Dec. 31, 2019
Trade Payables  
Trade payables
  Note    12.31.19    12.31.18
Non-current          
Customer guarantees       213,097     216,768
Customer contributions       156,455     172,720
Funding contributions - substations  2.c     -   50,628
Total Non-current       369,552     440,116
           
Current          
Payables for purchase of electricity - CAMMESA       4,367,129     8,727,732
Provision for unbilled electricity purchases - CAMMESA  2.c     4,938,327     9,584,381
Suppliers       3,042,079     3,730,485
Advance to customer       285,042     302,135
Customer contributions     30,858   23,508
Discounts to customers     37,372   57,467
Funding contributions - substations  2.c     -   26,471
Related parties  36.d     -   12,045
Total Current        12,700,807      22,464,224

  

The fair values of non-current customer contributions as of December 31, 2019 and 2018 amount to $ 45.1 million and $ 165.6 million, respectively. The fair values are determined based on estimated discounted cash flows in accordance with a representative market rate for this type of transactions. The applicable fair value category is Level 3 category.

 

The carrying amount of the other financial liabilities included in the Company’s trade payables approximates their fair value.