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Note 6 - Net Sales - Reconiciliation Between Gross Sales and Net Sales (Details) - BRL (R$)
R$ in Millions
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Statement Line Items [Line Items]      
Gross sales (i) [1] R$ 72,411.0 R$ 79,551.1 R$ 97,214.2
Excise duty (16,192.9) (16,345.2) (17,471.7)
Discounts (i) [1] (8,318.8) (17,603.3) (33,022.3)
R$ 47,899.3 R$ 45,602.6 R$ 46,720.2
[1] Variance resulting from the change in the billing method with direct effect on Gross sales and Discounts.