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28. EQUITY AND REMUNERATION TO SHAREHOLDERS (Details) - shares | 1 Months Ended |  |  |  |
--- | --- | --- | --- | --- | ---
Apr. 28, 2018 | Dec. 31, 2019 | Dec. 31, 2018 | Apr. 23, 2018 | Dec. 31, 2017
Number of shares issued |  | 1,258,841,654 | 1,458,752,601 | 199,910,947 | 1,258,841,654
Percentage of changes in share capital |  | 10000.00% | 100.00% |  | 100.00%
Description of capital increase | On April 23, 2018 a Shareholders’ Extraordinary General Meeting approved an increase in the Company’s capital, of R$ 999, from R$ 6,294 to R$ 7,294, through issuance of 199,910,947 new shares, each with nominal value of R$ 5.00, comprising 66,849,505 common shares and 133,061,442, preferred shares. |  |  |  |
Common Shares [Member] |  |  |  |  |
Number of shares issued |  | 487,614,213 | 487,614,213 |  | 420,764,708
Percentage of changes in share capital |  | 100.00% | 100.00% |  | 100.00%
Preferred Shares [Member] |  |  |  |  |
Number of shares issued |  | 971,138,388 | 971,138,388 | 199,910,947 | 838,076,946
Percentage of changes in share capital |  | 100.00% | 100.00% |  | 100.00%
State of minas gerais [member] |  |  |  |  |
Number of shares issued |  | 248,528,276 | 248,480,146 |  | 214,414,739
Percentage of changes in share capital |  | 17.00% | 17.00% |  | 17.00%
State of minas gerais [member] | Common Shares [Member] |  |  |  |  |
Number of shares issued |  | 248,516,953 | 248,480,146 |  | 214,414,739
Percentage of changes in share capital |  | 51.00% | 51.00% |  | 51.00%
State of minas gerais [member] | Preferred Shares [Member] |  |  |  |  |
Number of shares issued |  | 11,323 |  |  |
Other entities of minas gerais state [member] |  |  |  |  |
Number of shares issued |  | 1,431,172 | 70,435 |  | 4,916,931
Percentage of changes in share capital |  |  |  |  | 1.00%
Other entities of minas gerais state [member] | Common Shares [Member] |  |  |  |  |
Number of shares issued |  | 19,896 | 56,703 |  | 56,703
Other entities of minas gerais state [member] | Preferred Shares [Member] |  |  |  |  |
Number of shares issued |  | 1,411,276 | 647,647 |  | 4,860,228
Percentage of changes in share capital |  |  |  |  | 1.00%
FIA Dinamica Energia S.A. [member] |  |  |  |  |
Number of shares issued |  | 103,833,744 | 104,105,344 |  | 104,105,344
Percentage of changes in share capital |  | 7.00% | 7.00% |  | 8.00%
FIA Dinamica Energia S.A. [member] | Common Shares [Member] |  |  |  |  |
Number of shares issued |  | 48,700,000 | 48,200,000 |  | 41,635,754
Percentage of changes in share capital |  | 10.00% | 10.00% |  | 10.00%
FIA Dinamica Energia S.A. [member] | Preferred Shares [Member] |  |  |  |  |
Number of shares issued |  | 55,133,744 | 55,905,344 |  | 62,469,590
Percentage of changes in share capital |  | 6.00% | 6.00% |  | 7.00%
BNDES Participacoes [Member] |  |  |  |  |
Number of shares issued |  | 80,563,930 | 80,563,930 |  | 80,563,930
Percentage of changes in share capital |  | 6.00% | 5.00% |  | 6.00%
BNDES Participacoes [Member] | Common Shares [Member] |  |  |  |  |
Number of shares issued |  | 54,342,992 | 54,342,992 |  | 54,342,992
Percentage of changes in share capital |  | 11.00% | 11.00% |  | 13.00%
BNDES Participacoes [Member] | Preferred Shares [Member] |  |  |  |  |
Number of shares issued |  | 26,220,938 | 26,220,938 |  | 26,220,938
Percentage of changes in share capital |  | 3.00% | 3.00% |  | 3.00%
Other Shareholders In Brazil [member] |  |  |  |  |
Number of shares issued |  | 430,153,173 | 80,563,930 |  | 266,953,286
Percentage of changes in share capital |  | 29.00% | 33.00% |  | 21.00%
Other Shareholders In Brazil [member] | Common Shares [Member] |  |  |  |  |
Number of shares issued |  | 101,170,317 | 105,402,202 |  | 56,000,217
Percentage of changes in share capital |  | 21.00% | 22.00% |  | 13.00%
Other Shareholders In Brazil [member] | Preferred Shares [Member] |  |  |  |  |
Number of shares issued |  | 328,982,856 | 370,338,947 |  | 210,953,069
Percentage of changes in share capital |  | 34.00% | 38.00% |  | 25.00%
Foreign Shareholders [member] |  |  |  |  |
Number of shares issued |  | 594,242,306 | 549,157,682 |  | 587,887,424
Percentage of changes in share capital |  | 41.00% | 38.00% |  | 47.00%
Foreign Shareholders [member] | Common Shares [Member] |  |  |  |  |
Number of shares issued |  | 34,864,055 | 31,132,170 |  | 54,314,303
Percentage of changes in share capital |  | 7.00% | 6.00% |  | 13.00%
Foreign Shareholders [member] | Preferred Shares [Member] |  |  |  |  |
Number of shares issued |  | 559,378,251 | 518,025,512 |  | 533,573,121
Percentage of changes in share capital |  | 57.00% | 53.00% |  | 64.00%

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