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Note 17 - Deferred Income Tax and Social Contribution (Details Textual) - BRL (R$) R$ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Statement Line Items [Line Items] |  |  |
Applicable tax rate | 29.22% | 30.16% | 31.59%
Unrecognised tax losses and temporary differences | R$ 427.4 | R$ 455.6 |
Tax losses without limitation | R$ 1,709.5 | R$ 2,285.2 |
BRAZIL |  |  |
Statement Line Items [Line Items] |  |  |
Applicable tax rate |  | 25.00% |
Nominal social contribution rate |  |  | 9.00%
ARGENTINA |  |  |
Statement Line Items [Line Items] |  |  |
Applicable tax rate | 35.00% |  |
Applicable tax rate, first two years after legislation changes | 30.00% |  |
Applicable tax rate, later than two years after legislation changes | 25.00% |  |
Deferred tax expense (income) relating to tax rate changes or imposition of new taxes | R$ (33.0) |  |

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- Definition The applicable income tax rate for the first two years after legislation changes. + References No definition available. + Details
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- Definition The applicable income tax rate incorporated later than two years after legislation changes. + References No definition available. + Details
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- Definition The applicable tax rate for social contributions. + References No definition available. + Details
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- Definition The amount of unused tax losses for which no deferred tax asset is recognised and have no carryforward limit. + References No definition available. + Details
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- Definition The amount of unused tax losses for which no deferred tax asset is recognised in the statement of financial position and the amount of deductible temporary differences for which no deferred tax asset is recognised in the statement of financial position.. + References No definition available. + Details
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- Definition The applicable income tax rate. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2017-01-01 -Paragraph 81 -Subparagraph c -Clause ii -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=12&date=2017-03-01&anchor=para_81_c_ii&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition The amount of deferred tax expense or income relating to tax rate changes or the imposition of new taxes. [Refer: Deferred tax expense (income)] + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 12 -IssueDate 2017-01-01 -Paragraph 80 -Subparagraph d -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=12&date=2017-03-01&anchor=para_80_d&doctype=Standard -URIDate 2017-03-09 + Details
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