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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
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