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Note 19 - Trade Receivables - Current Trade Receivables (Details) - BRL (R$)
R$ in Millions
Dec. 31, 2017
Dec. 31, 2016
Statement Line Items [Line Items]    
Trade receivables R$ 5,335.7 R$ 4,774.5
Bad debt provision (521.5) (443.7)
Net, trade receivables 4,814.2 4,330.8
Related parties 130.6 37.3
Total current trade receivables R$ 4,944.8 R$ 4,368.1