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21. LEASING TRANSACTIONS (Details Narrative)
R$ in Millions
 12 Months Ended
Dec. 31, 2019
BRL (R$)
Up To Three Years [Member]  
Disclosure of fair value measurement of assets [line items]  
Borrowings interest rate 6.87%
Three To Four Years [Member]  
Disclosure of fair value measurement of assets [line items]  
Borrowings interest rate 7.33%
Longer Than Five Years [Member]  
Disclosure of fair value measurement of assets [line items]  
Borrowings interest rate 8.08%
Lease Liabilities [Member]  
Disclosure of fair value measurement of assets [line items]  
Description of varied borrowing rate Between 7.96% p.a. and 10.64% p.a., depending on the leasing contract period, and 13.17% p.a., respectively, for contracts with maturities of up to two years, two to five years and longer than five years.
PIS, Pasep and Cofins Taxes [Member]  
Disclosure of fair value measurement of assets [line items]  
Amortization R$ 5
Financial revenues R$ 2