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Note 21 - Changes in Equity - Interest on Shareholders' Equity/Dividends (Details) - BRL (R$) R$ / shares in Units, R$ in Millions |  |  |  |  |  |  |  |  |  |  | 12 Months Ended
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Dec. 28, 2018 | Jul. 30, 2018 | Feb. 22, 2018 | Dec. 28, 2017 | Jul. 17, 2017 | Feb. 23, 2017 | Dec. 29, 2016 | Nov. 25, 2016 | Jul. 29, 2016 | Feb. 29, 2016 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Statement Line Items [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount per share, dividends (in BRL per share) |  |  | R$ 0.16 | R$ 0.07 |  |  | R$ 0.16 | R$ 0.07 |  | R$ 0.16 | R$ 0.13 |  |  |  |
Total amount of dividends |  |  | R$ 2,515.1 | R$ 1,099.7 |  |  | R$ 2,513.1 | R$ 1,099.1 |  | R$ 2,511.9 | R$ 2,040.8 |  |  |  |
Amount per share, interest on shareholder´s equity (in BRL per share) | R$ 0.32 |  |  |  | R$ 0.31 |  |  |  | R$ 0.22 |  |  | R$ 0.13 |  |  |
Total amount of interest on shareholder´s equity | R$ 5,030.5 | [1] |  |  | R$ 4,869.7 | [1] |  |  | R$ 3,454.2 |  |  | R$ 2,039.2 | R$ 2,762.5 | R$ 4,044.0 | R$ 6,007.3
Total amount of dividends and interest on shareholder´s equity |  |  |  |  |  |  |  |  |  |  |  |  | R$ 7,545.6 | R$ 8,482.5 | R$ 11,145.2
[1] | R$3,770.1 of these interest on shareholder's equity refer to the total amount approved for distribution in the period, and were accrued in investments reserves.

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