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17. LEASES (Details Narrative) - BRL (R$)
R$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
PresentationOfLeasesForLesseeLineItems [Line Items]      
Right of use asset R$ 2,272,469 R$ 2,299,942 R$ 217,516
Lease liability 2,536,681 R$ 2,431,180 R$ 241,809
Other operating income 23,849    
Buildings class [member]      
PresentationOfLeasesForLesseeLineItems [Line Items]      
Right of use asset 13,473    
Lease liability R$ 36,245