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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, 2018
Dec. 31, 2017
Dec. 31, 2016
Statement Line Items [Line Items]      
Depreciation and impairment of property, plant and equipment, cost of sales R$ 2,681.9 R$ 2,364.7 R$ 2,283.3
Amortization of intangible assets, cost of sales 10.3 6.2 4.3
Depreciation and impairment of property, plant and equipment, distribution expenses 225.2 197.6 200.9
Amortization of intangible assets, distribution expenses
Depreciation and impairment of property, plant and equipment, sales and marketing expenses 581.4 532.2 538.0
Amortization of intangible assets, sales and marketing expenses 117.1 142.3 222.9
Depreciation and impairment of property, plant and equipment, administrative expenses 231.8 231.1 182.5
Amortization of intangible assets, administrative expenses 175.2 142.0 95.8
Depreciation and impairment of property, plant and equipment 3,720.3 3,325.6 3,204.7
Amortization of intangible assets R$ 302.6 R$ 290.5 R$ 323.0