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Post-employment Benefits (Details 6) - BRL (R$)
R$ in Thousands
Dec. 31, 2024
Dec. 31, 2023
Disclosure of defined benefit plans [line items]    
Total liabilities or partially covered R$ 10,764,057 R$ 11,893,783
Fair value of the plan assets (10,866,333) (11,289,509)
Plan coverage status (102,276) 604,274
Unrecognized asset 1,260,644 879,543
Total 1,158,368 R$ 1,483,817
Unified Plan [Member]    
Disclosure of defined benefit plans [line items]    
Total liabilities or partially covered 5,468,000  
Fair value of the plan assets (6,324,954)  
Plan coverage status (856,954)  
Unrecognized asset 856,954  
Total 0  
Plan III [Member]    
Disclosure of defined benefit plans [line items]    
Total liabilities or partially covered 3,947,761  
Fair value of the plan assets (4,351,451)  
Plan coverage status (403,690)  
Unrecognized asset 403,690  
Total 0  
Assistance Plan [Member]    
Disclosure of defined benefit plans [line items]    
Total liabilities or partially covered 1,348,296  
Fair value of the plan assets (189,928)  
Plan coverage status 1,158,368  
Unrecognized asset 0  
Total R$ 1,158,368