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Post-Employment Obligations - Schedule of Assumptions (Details)
R$ in Millions
Dec. 31, 2024
BRL (R$)
IfrsStatementLineItems [Line Items]  
Reduction of one year in the mortality table R$ 303
Increase of one year in the mortality table (284)
Reduction of 1% in the discount rate 1,068
Increase of 1% in the discount rate (942)
Pension And Retirement Supplement Plans [member]  
IfrsStatementLineItems [Line Items]  
Reduction of one year in the mortality table 257
Increase of one year in the mortality table (237)
Reduction of 1% in the discount rate 826
Increase of 1% in the discount rate (719)
Health plan [member]  
IfrsStatementLineItems [Line Items]  
Reduction of one year in the mortality table 45
Increase of one year in the mortality table (46)
Reduction of 1% in the discount rate 238
Increase of 1% in the discount rate (219)
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 4
Increase of 1% in the discount rate R$ (4)