XML 196 R144.htm IDEA: XBRL DOCUMENT
v3.19.1

Stockholders' equity - Additional Information (Detail) |  |  | 12 Months Ended |
--- | --- | --- | --- | ---
Feb. 22, 2018 BRL (R$) shares | Dec. 15, 2017 shares | Dec. 31, 2018 R$ / shares shares | Dec. 31, 2017 shares | Dec. 31, 2016 shares
Disclosure of classes of share capital [line items] |  |  |  |  |
Total share capital |  |  | 9,804,135,348 | 9,825,771,656 | 9,873,461,313
Par value | R$ / shares |  |  | R$ 0 |  |
Number of common stock |  |  | 4,958,290,359 |  |
Number of preferred stock |  |  | 4,845,844,989 |  |
Cancellation of Shares |  |  | 14,424,206 | 47,689,657 |
Percentage of stock split approved |  |  | 0.50 |  |
Annual minimum priority dividend | R$ / shares |  |  | R$ 0.015 |  |
Bottom of range [member] |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |
Annual mandatory dividend rate |  |  | 25.00% |  |
Preference shares [member] |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |
Total share capital |  |  | 4,845,844,989 | 4,845,844,988 | 4,845,844,988
Annual minimum priority dividend | R$ / shares |  |  | R$ 0.022 |  |
Ordinary shares [member] |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |
Total share capital |  |  | 4,958,290,359 | 4,979,926,668 | 5,027,616,325
Cancellation of Shares | 14,424,206 | 31,793,105 | 14,424,206 | 47,689,657 |
Value of cancellation of shares considering effect of split | R$ | R$ 47,689,657 |  |  |  |

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