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Changes in dividends receivable are as follows: (Details) - BRL (R$)
R$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Changes In Dividends Receivable Are As Follows    
Opening balances R$ 188 R$ 186
Dividends proposed by investees 655 399
Elimination of dividends due to business combination (1)
Adjustment of dividends proposed by investee classified as held for sale (1)
Withholding income tax on Interest on equity (9) (8)
Amounts received 499 387
Ending balances R$ 335 R$ 188