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22 Cash and cash equivalents
12 Months Ended
Dec. 31, 2020
Cash and cash equivalents [abstract]  
Cash and cash equivalents
Note 22 | Cash and cash equivalents

 

     12.31.20     12.31.19 
Cash and banks    1,638    218
Money market funds     2,724    340
Total cash and cash equivalents    4,362    558