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Note 24 - Share-based Payments (Tables) | 12 Months Ended
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Dec. 31, 2018
Statement Line Items [Line Items] |
Disclosure of indirect measurement of fair value of goods or services received, share options granted during period [text block] |
In R$, except when otherwise indicated |  |  | 2018 | (i) |  |  | 2017 | (i) |  |  | 2016 | (i)
Fair value of options granted |  |  | 5.62 |  |  |  | 6.51 |  |  |  | 6.21 |
Share price |  |  | 18.04 |  |  |  | 19.80 |  |  |  | 17.18 |
Exercise price |  |  | 18.04 |  |  |  | 19.80 |  |  |  | 17.18 |
Expected volatility |  |  | 26.2 | % |  |  | 26.7 | % |  |  | 27.0 | %
Vesting year |  |  | 5 |  |  |  | 5 |  |  |  | 5 |
Expected dividends |  |  | 5 | % |  |  | 5 | % |  |  | 5 | %
Risk-free interest rate |  |  | 9.6 | % (ii) |  |  | 10.1 | % (ii) |  |  | 12.4 | % (ii)
Disclosure of the number of share options [text block] |
Thousand options |  |  | 2018 |  |  |  | 2017 |  |  |  | 2016 |
Options outstanding at January 1 st |  |  | 135,221 |  |  |  | 131,244 |  |  |  | 121,770 |
Options issued during the period |  |  | 19,899 |  |  |  | 20,435 |  |  |  | 24,806 |
Options exercised during the period |  |  | (9,988 | ) |  |  | (13,548 | ) |  |  | (11,613 | )
Options forfeited during the period |  |  | (3,804 | ) |  |  | (2,910 | ) |  |  | (3,719 | )
Options outstanding at ended year |  |  | 141,328 |  |  |  | 135,221 |  |  |  | 131,244 |
Disclosure of weighted average exercise prices of share options [text block] |
In R$ per share |  |  | 2018 |  |  |  | 2017 |  |  |  | 2016 |
Options outstanding at January 1 st |  |  | 15.27 |  |  |  | 13.87 |  |  |  | 12.36 |
Options issued during the period |  |  | 18.04 |  |  |  | 19.82 |  |  |  | 17.18 |
Options forfeited during the period |  |  | 18.55 |  |  |  | 17.88 |  |  |  | 12.83 |
Options exercised during the period |  |  | 7.47 |  |  |  | 5.81 |  |  |  | 2.52 |
Options outstanding at ended period |  |  | 16.16 |  |  |  | 15.27 |  |  |  | 13.87 |
Options exercisable at ended period |  |  | 2.25 |  |  |  | 3.78 |  |  |  | 3.66 |
Disclosure of number and weighted average exercise prices of other equity instruments [text block] |
Thousand deferred shares |  |  | 2018 |  |  |  | 2017 |  |  |  | 2016 |
Deferred shares outstanding at January 1 st |  |  | 16,300 |  |  |  | 19,260 |  |  |  | 19,056 |
New deferred shares during the period |  |  | 426 |  |  |  | 794 |  |  |  | 7,329 |
Deferred shares granted during the period |  |  | (3,429 | ) |  |  | (2,874 | ) |  |  | (6,118 | )
Deferred shares forfeited during the period |  |  | (989 | ) |  |  | (880 | ) |  |  | (1,007 | )
Deferred shares outstanding at ended year |  |  | 12,308 |  |  |  | 16,300 |  |  |  | 19,260 |
Thousand deferred shares |  |  | 2018 |  |  |  | 2017 |  |  |  | 2016 |
Restricted shares outstanding at January 1st |  |  | – |  |  |  | – |  |  |  | – |
New restricted shares during the period |  |  | 13,055 |  |  |  | – |  |  |  | – |
Restricted shares granted during the period |  |  | (296 | ) |  |  | – |  |  |  | – |
Restricted shares forfeited during the period |  |  | (103 | ) |  |  | – |  |  |  | – |
Restricted shares outstanding at ended year |  |  | 12,656 |  |  |  | – |  |  |  | – |

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