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Schedule of trade and accounts payable (Details) - BRL (R$)
R$ in Thousands
Sep. 30, 2021
Dec. 31, 2020
DisclosureOfTradePayablesLineItems [Line Items]    
Third parties R$ 11,195,643 R$ 9,098,376
(-) Adjustment to present value (106,447) (88,389)
Trade and accounts payable 11,089,196 9,009,987
Current 11,077,197 8,996,206
Non-current 11,999 13,781
Country of domicile [member]    
DisclosureOfTradePayablesLineItems [Line Items]    
Third parties 9,216,162 7,611,170
Foreign countries [member]    
DisclosureOfTradePayablesLineItems [Line Items]    
Third parties R$ 1,979,481 R$ 1,487,206