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Schedule of changes of investments balances in subsidiaries, joint ventures, joint operations, associates and other investments (Details) - BRL (R$) R$ in Thousands | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Opening balance of investments (assets) | R$ 3,535,906 | R$ 3,482,974 |
Capital increase and (Decrease)/acquisition of shares(1) | 58,178 | 3,400 |
Dividends (2) | (61,898) | (82,642) |
Comprehensive income (3) | 453 | 6,895 |
Update of shares measured at fair value through profit or loss (Note 15 II) | 109,254 | 12,579 |
Equity in results of affiliated companies (6) | 219,508 | 124,324 | R$ 125,715
Amortization of fair value - investment MRS | (11,747) | (11,747) |
Others | (7) | 123 |
Closing balance of investments (assets) | R$ 3,849,647 | R$ 3,535,906 | R$ 3,482,974

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