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Provisions, contingent assets and contingent liabilities (Details Narrative) - BRL (R$)
R$ in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
IfrsStatementLineItems [Line Items]    
Receivables balance arising from reimbursements of contingencies R$ 899 R$ 888
Civil lawsuits [Member]    
IfrsStatementLineItems [Line Items]    
Total estimated risk 5,087 4,903
Labor claims [Member]    
IfrsStatementLineItems [Line Items]    
Total estimated risk 637 448
Tax And Social Security Obligations [Member]    
IfrsStatementLineItems [Line Items]    
Non-compensatory amounts R$ 40,958 R$ 35,855