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Note 24 - Share-based Payments - Weighted Average Exercise Price of Options (Details) - BRL (R$) | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Statement Line Items [Line Items] |  |  |
Options outstanding at January 1 st, weighted average exercise price | R$ 13.87 | R$ 12.36 | R$ 10.07
Options issued during the period, weighted average exercise price | 19.82 | 17.18 | 18.42
Options forfeited during the period, weighted average exercise price | 17.88 | 12.83 | 20.35
Options exercised during the period, weighted average exercise price | 5.81 | 2.52 | 5.05
Options outstanding at ended period, weighted average exercise price | 15.27 | 13.87 | 12.36
Options exercisable at ended period, weighted average exercise price | R$ 3.78 | R$ 3.66 | R$ 3.29

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- Definition The weighted average exercise price of share options exercisable in a share-based payment arrangement. [Refer: Weighted average [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2017-01-01 -Paragraph 45 -Subparagraph b -Clause vii -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=2&date=2017-03-01&anchor=para_45_b_vii&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition The weighted average exercise price of share options exercised in a share-based payment arrangement. [Refer: Weighted average [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2017-01-01 -Paragraph 45 -Subparagraph b -Clause iv -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=2&date=2017-03-01&anchor=para_45_b_iv&doctype=Standard -URIDate 2017-03-09 + Details
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