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Note 23 - Employee Benefits - Employee Benefit Revenue/(Expenses) Allocation (Details) - BRL (R$) R$ in Millions | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Statement Line Items [Line Items] |  |  |
Employee Benefit Revenue/(Expenses) Allocation | R$ (142.0) | R$ (138.7) | R$ (151.7)
Employee benefit revenue (expenses) allocated to cost of sales [member] |  |  |
Statement Line Items [Line Items] |  |  |
Employee Benefit Revenue/(Expenses) Allocation | (19.2) | (22.3) | (24.5)
Employee benefit revenue (expenses) allocated to sales and marketing expenses [member] |  |  |
Statement Line Items [Line Items] |  |  |
Employee Benefit Revenue/(Expenses) Allocation | (8.8) | (5.0) | (9.5)
Employee benefit revenue (expenses) allocated to administrative expenses [member] |  |  |
Statement Line Items [Line Items] |  |  |
Employee Benefit Revenue/(Expenses) Allocation | (11.0) | (10.1) | (10.2)
Employee benefit revenue (expenses) allocated to financial expenses [member] |  |  |
Statement Line Items [Line Items] |  |  |
Employee Benefit Revenue/(Expenses) Allocation | (103.0) | (101.3) | (105.6)
Employee benefit revenue (expenses) allocated to exceptional items [member] |  |  |
Statement Line Items [Line Items] |  |  |
Employee Benefit Revenue/(Expenses) Allocation |  |  | R$ (1.9)

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- Definition The amount of post-employment benefit expense relating to defined benefit plans. [Refer: Defined benefit plans [member]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 19 -IssueDate 2017-01-01 -Paragraph 5 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=19&date=2017-03-01&anchor=para_5&doctype=Standard -URIDate 2017-03-09 + Details
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