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Post-employment Benefits (Details 11)
R$ in Thousands
 12 Months Ended
Dec. 31, 2022
BRL (R$)
Later than one year and not later than two years [member]  
IfrsStatementLineItems [Line Items]  
Benefits payable R$ 551,759
Later than two years and not later than three years [member]  
IfrsStatementLineItems [Line Items]  
Benefits payable 550,563
Later than three years and not later than four years [member]  
IfrsStatementLineItems [Line Items]  
Benefits payable 548,903
Later than four years and not later than five years [member]  
IfrsStatementLineItems [Line Items]  
Benefits payable 544,653
Noncurrent liabilities, effects of applying new IFRS  
IfrsStatementLineItems [Line Items]  
Benefits payable 540,137
Later Than Five Years And Not Later Than Fourty Nine Years [Member]  
IfrsStatementLineItems [Line Items]  
Benefits payable 7,244,222
Unified Plan [Member] | Not later than one year [member]  
IfrsStatementLineItems [Line Items]  
Benefits payable 317,523
Unified Plan [Member] | Later than two years and not later than three years [member]  
IfrsStatementLineItems [Line Items]  
Benefits payable 316,790
Unified Plan [Member] | Later than three years and not later than four years [member]  
IfrsStatementLineItems [Line Items]  
Benefits payable 316,908
Unified Plan [Member] | Later than four years and not later than five years [member]  
IfrsStatementLineItems [Line Items]  
Benefits payable 316,481
Unified Plan [Member] | Noncurrent liabilities, effects of applying new IFRS  
IfrsStatementLineItems [Line Items]  
Benefits payable 315,703
Unified Plan [Member] | Later Than Five Years And Not Later Than Fourty Nine Years [Member]  
IfrsStatementLineItems [Line Items]  
Benefits payable 3,885,982
Plan I I I [Member] | Not later than one year [member]  
IfrsStatementLineItems [Line Items]  
Benefits payable 153,226
Plan I I I [Member] | Later than two years and not later than three years [member]  
IfrsStatementLineItems [Line Items]  
Benefits payable 152,659
Plan I I I [Member] | Later than three years and not later than four years [member]  
IfrsStatementLineItems [Line Items]  
Benefits payable 152,239
Plan I I I [Member] | Later than four years and not later than five years [member]  
IfrsStatementLineItems [Line Items]  
Benefits payable 151,790
Plan I I I [Member] | Noncurrent liabilities, effects of applying new IFRS  
IfrsStatementLineItems [Line Items]  
Benefits payable 151,358
Plan I I I [Member] | Later Than Five Years And Not Later Than Fourty Nine Years [Member]  
IfrsStatementLineItems [Line Items]  
Benefits payable 2,598,345
Assistance Plan [Member] | Not later than one year [member]  
IfrsStatementLineItems [Line Items]  
Benefits payable 81,010
Assistance Plan [Member] | Later than two years and not later than three years [member]  
IfrsStatementLineItems [Line Items]  
Benefits payable 81,114
Assistance Plan [Member] | Later than three years and not later than four years [member]  
IfrsStatementLineItems [Line Items]  
Benefits payable 79,756
Assistance Plan [Member] | Later than four years and not later than five years [member]  
IfrsStatementLineItems [Line Items]  
Benefits payable 76,382
Assistance Plan [Member] | Noncurrent liabilities, effects of applying new IFRS  
IfrsStatementLineItems [Line Items]  
Benefits payable 73,076
Assistance Plan [Member] | Later Than Five Years And Not Later Than Fourty Nine Years [Member]  
IfrsStatementLineItems [Line Items]  
Benefits payable R$ 759,895