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POST-EMPLOYMENT OBLIGATIONS (Details 8)
R$ in Millions
Dec. 31, 2022
BRL (R$)
IfrsStatementLineItems [Line Items]  
Reduction of one year in the mortality table R$ 301
Increase of one year in the mortality table (306)
Reduction of 1% in the discount rate 1,407
Pension And Retirement Supplement Plans [member]  
IfrsStatementLineItems [Line Items]  
Reduction of one year in the mortality table 247
Increase of one year in the mortality table (251)
Reduction of 1% in the discount rate 982
Health plan [member]  
IfrsStatementLineItems [Line Items]  
Reduction of one year in the mortality table 53
Increase of one year in the mortality table (54)
Reduction of 1% in the discount rate 418
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$ 7