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Note 10 - Additional Information on Operating Expenses by Nature - Depreciation, Amortization and Impairment Expenses (Details) - BRL (R$)
R$ in Millions
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Statement Line Items [Line Items]      
Depreciation and impairment of property, plant and equipment, cost of sales R$ 2,364.7 R$ 2,283.3 R$ 2,053.2
Amortization of intangible assets, cost of sales 6.2 4.3 3.2
Depreciation and impairment of property, plant and equipment, distribution expenses 197.6 200.9 177.9
Amortization of intangible assets, distribution expenses
Depreciation and impairment of property, plant and equipment, sales and marketing expenses 532.2 538.0 431.5
Amortization of intangible assets, sales and marketing expenses 142.3 222.9 162.5
Depreciation and impairment of property, plant and equipment, administrative expenses 231.1 182.5 165.8
Amortization of intangible assets, administrative expenses 142.0 95.8 81.5
Depreciation and impairment of property, plant and equipment 3,325.6 3,204.7 2,828.4
Amortization of intangible assets R$ 290.5 R$ 323.0 R$ 247.2