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Post-Employment Obligations - Schedule of Assumptions (Details)
R$ in Millions
Dec. 31, 2023
BRL (R$)
IfrsStatementLineItems [Line Items]  
Reduction of one year in the mortality table R$ 403
Increase of one year in the mortality table (374)
Reduction of 1% in the discount rate 1,488
Pension And Retirement Supplement Plans [member]  
IfrsStatementLineItems [Line Items]  
Reduction of one year in the mortality table 341
Increase of one year in the mortality table (311)
Reduction of 1% in the discount rate 1,140
Health plan [member]  
IfrsStatementLineItems [Line Items]  
Reduction of one year in the mortality table 61
Increase of one year in the mortality table (62)
Reduction of 1% in the discount rate 342
Dental plan [member]  
IfrsStatementLineItems [Line Items]  
Reduction of one year in the mortality table 1
Increase of one year in the mortality table (1)
Reduction of 1% in the discount rate R$ 6