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26. EQUITY AND REMUNERATION TO SHAREHOLDERS (Details 4) - BRL (R$) R$ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018 | Jan. 02, 2019
BasicEarningsPerShareLineItems [Line Items] |  |  |  |  |  |  |
Investment-related donations and subsidies |  | R$ 1,857 | R$ 1,857 |  | R$ 1,857 |  |
Goodwill on issuance of shares |  | 394 | 394 |  | 394 |  |
Shares in treasury |  | (1) | (1) |  | (1) |  |
Capital reserves and shares in Treasury |  | 2,250 | 2,250 | [1] | 2,250 |  |
Legal reserve |  | 995 |  |  |  |  |
Statutory reserve |  | 57 |  |  |  |  |
Retained earnings reserve |  | 6,650 |  |  |  |  |
Unrealized profit reserve |  | 835 |  |  |  |  |
Incentive tax reserve |  | 103 |  |  |  |  |
Reserve for mandatory dividends not distributed |  | 1,420 |  |  |  |  |
Profit reserves |  |  |  |  |  |  |
Restated [member] |  |  |  |  |  |  |
BasicEarningsPerShareLineItems [Line Items] |  |  |  |  |  |  |
Capital reserves and shares in Treasury | [2] |  | 2,250 |  |  | R$ 2,250 |
Legal reserve |  |  | 853 |  | 853 |  |
Statutory reserve |  |  | 57 |  | 57 |  |
Retained earnings reserve |  |  | 5,500 |  | 3,965 |  |
Unrealized profit reserve |  |  | 835 |  |  |  |
Incentive tax reserve |  |  | 85 |  | 67 |  |
Reserve for mandatory dividends not distributed |  |  | 1,420 |  | 1,420 |  |
Profit reserves |  |  | R$ 212 | [2] | R$ 6,362 | R$ 145 | [2]
[1] | See note 2.8.
[2] | For further details of restatement of comparative balances, see Note 2.8

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