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Schedule of trade accounts receivable, net and notes receivable (Details) - BRL (R$)
R$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
IfrsStatementLineItems [Line Items]    
Trade accounts receivable, gross R$ 4,697,942 R$ 4,719,137
Adjustment to present value (14,394) (13,316)
Expected credit losses (638,583) (605,940)
Trade accounts receivable, net 4,044,965 4,099,881
Current 4,039,155,000 4,136,421,000
Non-current 5,810 7,026
Current 4,107,156 4,136,421
Non-current 34,978 49,864
Other Receivables [Member]    
IfrsStatementLineItems [Line Items]    
Trade accounts receivable, gross 114,565 113,949
Adjustment to present value (1,610) (156)
Expected credit losses (15,786) (27,389)
Trade accounts receivable, net 97,169 86,404
Current 68,001 43,566
Non-current [1] 29,168 42,838
Country of domicile [member] | Trade receivables [member]    
IfrsStatementLineItems [Line Items]    
Customers 1,610,300 2,002,586
Foreign countries [member] | Trade receivables [member]    
IfrsStatementLineItems [Line Items]    
Customers R$ 3,087,642 R$ 2,716,551
[1] Weighted average maturity of 1.92 years.