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19 SHAREHOLDERS' EQUITY (Details) - shares | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Number of common shares outstanding |  | 1,387,524,047 | 1,387,524,047
Percent of total shares |  | 100.00% | 100.00%
Outstanding Shares [Member] |  |  |
Number of common shares outstanding |  | 1,380,114,547 | 1,380,114,547
Percent of total shares |  | 99.47% | 99.47%
Percent of voting capital |  | 100.00% | 100.00%
Treasury Shares [Member] |  |  |
Number of common shares outstanding |  | 7,409,500 | 7,409,500
Percent of total shares |  | 0.53% | 0.53%
Other Shareholders [Member] |  |  |
Number of common shares outstanding |  | 380,192,687 | 358,246,471
Percent of total shares |  | 27.40% | 25.83%
Percent of voting capital |  | 27.55% | 25.95%
Vicunha Acos S.A. [Member] |  |  |
Number of common shares outstanding | [1] | 679,522,254 | 679,522,254
Percent of total shares | [1] | 48.97% | 48.97%
Percent of voting capital | [1] | 49.24% | 49.24%
Rio Iaco Participacoes S.A. [Member] |  |  |
Number of common shares outstanding | [1] | 58,193,503 | 58,193,503
Percent of total shares | [1] | 4.19% | 4.19%
Percent of voting capital | [1] | 4.22% | 4.22%
NYSE (ADRs) [Member] |  |  |
Number of common shares outstanding |  | 262,206,103 | 284,152,319
Percent of total shares |  | 18.90% | 20.48%
Percent of voting capital |  | 19.00% | 20.59%
[1] | Controlling group companies.

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