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Post-employment Benefits (Details 9)
R$ in Thousands
 12 Months Ended
Dec. 31, 2022
BRL (R$)
Plan I I I [Member]  
IfrsStatementLineItems [Line Items]  
Cost of current service R$ 3,966
Estimated cost of interest 397,093
Expected return on plan assets (410,063)
Expected employee contributions (1,983)
Costs (income or loss) (10,987)
Assistance Plan [Member]  
IfrsStatementLineItems [Line Items]  
Cost of current service 6,879
Estimated cost of interest 141,876
Expected return on plan assets (18,629)
Expected employee contributions
Costs (income or loss) 130,126
Unified Plan [Member]  
IfrsStatementLineItems [Line Items]  
Cost of current service 205
Estimated cost of interest 700,311
Expected return on plan assets (769,615)
Expected employee contributions (89)
Costs (income or loss) R$ (69,188)