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6. CASH AND CASH EQUIVALENTS (Tables)
 12 Months Ended
Dec. 31, 2019
Cash and cash equivalents [abstract]  
Schedule of cash and cash equivalents
     2019             2018    
Bank accounts    210       108  
Cash equivalents               
Bank certificates of deposit (CDBs) (1)    290       555  
Overnight (2)    36       228  
    326       783  
    536       891  

 

(1)      Bank Certificates of Deposit (Certificados de Depósito Bancário, or CBDs), accrued interest at 80% to 106%, of the CDI Rate (Interbank Rate for Interbank Certificates of Deposit or Certificados de Depósito Inter-bancário – CDIs) published by the Custody and Settlement Chamber (Câmara de Custódia e Liquidação, or Cetip) in 2019 (40% to 106% in 2018 and 50% to 106% in 2017). For these CDBs, the Company has repo transactions which state, on their trading notes, the bank’s commitment to repurchase the security, on demand, on the maturity date of the transaction, or earlier.
(2)      Overnight transactions are repos available for redemption on the following day. They are usually backed by Treasury Bills, Notes or Bonds and referenced to a pre-fixed rate of 4.39% in 2019 (6.39%, in 2018 and 6.89% in 2017). Their purpose is to settle the short-term obligations of the Company, or to be used in the acquisition of other assets with better return to replenish the portfolio.