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Provisions for Legal Claims and Contingent Liabilities (Details) - BRL (R$)
R$ in Thousands
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
IfrsStatementLineItems [Line Items]    
Provisions for legal claims, beginning R$ 2,037,599 R$ 1,597,365
Provision for litigations, additions 360,449 694,110
Provision for litigations, reversals (186,170) (122,873)
Construction cost, additions/(rev.) (25,945) 3,583
Monetary restatement 77,715 73,208
Additions to assets (41,380) 37,551
Settlement (373,616) (242,212)
Transfers/others (19,736) (3,133)
Provisions for legal claims, ending 1,828,916 2,037,599
Current provisions 336,000  
Non current provisions 1,492,916  
Tax [Member]    
IfrsStatementLineItems [Line Items]    
Provisions for legal claims, beginning 201,750 181,115
Provision for litigations, additions 15,739 30,667
Provision for litigations, reversals (7,444) (2,424)
Construction cost, additions/(rev.)
Monetary restatement 7,355 8,147
Additions to assets
Settlement (15,955) (9,764)
Transfers/others 6,985 (5,991)
Provisions for legal claims, ending 208,430 201,750
Tax [Member] | Cofins [Member]    
IfrsStatementLineItems [Line Items]    
Provisions for legal claims, beginning 123,564 110,059
Provision for litigations, additions 15,109
Provision for litigations, reversals (1,604)
Construction cost, additions/(rev.)
Monetary restatement 9,807
Additions to assets
Settlement
Transfers/others
Provisions for legal claims, ending 133,371 123,564
Tax [Member] | Others [Member]    
IfrsStatementLineItems [Line Items]    
Provisions for legal claims, beginning 78,186 71,056
Provision for litigations, additions 15,739 15,558
Provision for litigations, reversals (7,444) (820)
Construction cost, additions/(rev.)
Monetary restatement (2,452) 8,147
Additions to assets
Settlement (15,955) (9,764)
Transfers/others 6,985 (5,991)
Provisions for legal claims, ending 75,059 78,186
Labors [Member]    
IfrsStatementLineItems [Line Items]    
Provisions for legal claims, beginning 536,464 569,756
Provision for litigations, additions 103,947 86,895
Provision for litigations, reversals (65,303) (2,778)
Construction cost, additions/(rev.)
Monetary restatement 43,877 22,007
Additions to assets (91)
Settlement (231,859) (139,416)
Transfers/others (396)
Provisions for legal claims, ending 386,639 536,464
Employee Benefits [Member]    
IfrsStatementLineItems [Line Items]    
Provisions for legal claims, beginning 30,126 37,148
Provision for litigations, additions 12,234 13,270
Provision for litigations, reversals (4,328) (19,672)
Construction cost, additions/(rev.)
Monetary restatement
Additions to assets
Settlement (516) (620)
Transfers/others
Provisions for legal claims, ending 37,516 30,126
Civil [Member]    
IfrsStatementLineItems [Line Items]    
Provisions for legal claims, beginning 1,260,766 706,191
Provision for litigations, additions 144,821 553,490
Provision for litigations, reversals (24,331) (13,888)
Construction cost, additions/(rev.) (25,945) 3,583
Monetary restatement 25,894 47,705
Additions to assets (41,289) 37,551
Settlement (124,998) (76,724)
Transfers/others (26,325) 2,858
Provisions for legal claims, ending 1,188,593 1,260,766
Civil [Member] | Civil And Administrative Claims [Member]    
IfrsStatementLineItems [Line Items]    
Provisions for legal claims, beginning 958,111 433,437
Provision for litigations, additions 134,634 545,243
Provision for litigations, reversals (19,782) (3,925)
Construction cost, additions/(rev.)
Monetary restatement 26,818 47,553
Additions to assets 278
Settlement (119,067) (67,055)
Transfers/others (26,325) 2,858
Provisions for legal claims, ending 954,667 958,111
Civil [Member] | Easements [Member]    
IfrsStatementLineItems [Line Items]    
Provisions for legal claims, beginning 138,724 138,069
Provision for litigations, additions 1,748 3,594
Provision for litigations, reversals (90)
Construction cost, additions/(rev.) (21,596) (722)
Monetary restatement  
Additions to assets 1,133 627
Settlement (5,884) (2,754)
Transfers/others
Provisions for legal claims, ending 114,125 138,724
Civil [Member] | Expropriations And Property [Member]    
IfrsStatementLineItems [Line Items]    
Provisions for legal claims, beginning 154,912 125,028
Provision for litigations, additions 6,856 2,195
Provision for litigations, reversals (1,461) (8,113)
Construction cost, additions/(rev.) (4,349) 4,305
Monetary restatement (535)
Additions to assets (42,700) 36,924
Settlement 41 (5,427)
Transfers/others
Provisions for legal claims, ending 112,764 154,912
Civil [Member] | Customers [Member]    
IfrsStatementLineItems [Line Items]    
Provisions for legal claims, beginning 3,750 3,755
Provision for litigations, additions 319 2,039
Provision for litigations, reversals (1,676) (630)
Construction cost, additions/(rev.)
Monetary restatement 74
Additions to assets
Settlement 51 (1,488)
Transfers/others
Provisions for legal claims, ending 2,444 3,750
Civil [Member] | Environmental [Member]    
IfrsStatementLineItems [Line Items]    
Provisions for legal claims, beginning 5,269 5,902
Provision for litigations, additions 1,264 419
Provision for litigations, reversals (1,412) (1,130)
Construction cost, additions/(rev.)
Monetary restatement (389) 78
Additions to assets
Settlement (139)
Transfers/others
Provisions for legal claims, ending 4,593 5,269
Regulatory [Member]    
IfrsStatementLineItems [Line Items]    
Provisions for legal claims, beginning 8,493 103,155
Provision for litigations, additions 83,708 9,788
Provision for litigations, reversals (84,764) (84,111)
Construction cost, additions/(rev.)
Monetary restatement 589 (4,651)
Additions to assets
Settlement (288) (15,688)
Transfers/others
Provisions for legal claims, ending R$ 7,738 R$ 8,493