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Note 29 - Collateral and Contractual Commitments with Suppliers, Advances From Customers and Other - Future Contractual Commitments (Details) - BRL (R$)
R$ in Millions
Dec. 31, 2018
Dec. 31, 2017
Statement Line Items [Line Items]    
Future contractual commitments R$ 12,078.6 R$ 11,096.3
Not later than one year [member]    
Statement Line Items [Line Items]    
Future contractual commitments 4,827.0 3,812.8
Later than one year and not later than two years [member]    
Statement Line Items [Line Items]    
Future contractual commitments 2,932.4 2,995.7
Later than two years [member]    
Statement Line Items [Line Items]    
Future contractual commitments R$ 4,319.2 R$ 4,287.8