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Post-employment Benefits (Details 6) - BRL (R$)
R$ in Thousands
Dec. 31, 2023
Dec. 31, 2022
IfrsStatementLineItems [Line Items]    
Total liabilities or partially covered R$ 11,893,783 R$ 10,721,838
Fair value of the plan assets (11,289,509) (10,323,018)
Plan coverage status 604,274 398,820
Unrecognized asset 879,543 670,268
Total 1,483,817 R$ 1,069,088
Unified Plan [Member]    
IfrsStatementLineItems [Line Items]    
Total liabilities or partially covered 6,416,085  
Fair value of the plan assets (7,212,015)  
Plan coverage status (795,930)  
Unrecognized asset 795,930  
Total  
PlanIII [member]    
IfrsStatementLineItems [Line Items]    
Total liabilities or partially covered 3,820,011  
Fair value of the plan assets (3,903,624)  
Plan coverage status (83,613)  
Unrecognized asset 83,613  
Total  
Assistance Plan [Member]    
IfrsStatementLineItems [Line Items]    
Total liabilities or partially covered 1,657,687  
Fair value of the plan assets (173,870)  
Plan coverage status 1,483,817  
Unrecognized asset  
Total R$ 1,483,817