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22. SUPPLIERS (Tables)
12 Months Ended
Dec. 31, 2019
Current raw materials and current production supplies [abstract]  
Schedule of suppliers

    2019          2018  
Energy on spot market – CCEE    401       139  
Charges for use of energy network    145       122  
Energy purchased for resale    764       775  
Itaipu Binacional    243       268  
Gas purchased for resale    143       124  
Materials and services    384       373  
    2,080      

1,801