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Operating Costs and Expenses - Schedule of Other Operating Expenses (Revenues), Net (Details) - BRL (R$)
R$ in Millions
 3 Months Ended 12 Months Ended
Jun. 30, 2022
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Disclosure of disaggregation of revenue from contracts with customers [line items]        
Personnel   R$ 1,308 R$ 1,352 R$ 1,241
Employees’ and managers’ income sharing   157 83 134
Post-employment benefits (Note 24)   591 626 15
Materials   140 148 94
Outsourced services   1,902 1,706 1,450
Depreciation and amortization   1,274 1,182 1,049
Operating provisions and adjustments for operating losses   434 401 231
Expected credit losses of accounts receivable   175 109 144
Reversal of provision for doubtful with related party - Renova   1 (54)
Write-off of financial asset (Note 14) R$ 172 172
Gains arising from the sale of equity interest   (319) (52)
Other operation costs and expenses   504 396 394
Total   6,167 6,069 4,752
Operating Cost [Member]        
Disclosure of disaggregation of revenue from contracts with customers [line items]        
Personnel   1,000 976 983
Employees’ and managers’ income sharing  
Post-employment benefits (Note 24)  
Materials   100 93 76
Outsourced services   1,652 1,433 1,265
Depreciation and amortization   1,247 1,110 947
Operating provisions and adjustments for operating losses   333 278 86
Expected credit losses of accounts receivable  
Reversal of provision for doubtful with related party - Renova  
Write-off of financial asset (Note 14)  
Gains arising from the sale of equity interest  
Other operation costs and expenses   240 205 81
Total   4,572 4,095 3,438
Expected Credit Loss [Member]        
Disclosure of disaggregation of revenue from contracts with customers [line items]        
Personnel  
Employees’ and managers’ income sharing  
Post-employment benefits (Note 24)  
Materials  
Outsourced services  
Depreciation and amortization  
Operating provisions and adjustments for operating losses  
Expected credit losses of accounts receivable   175 109 144
Reversal of provision for doubtful with related party - Renova  
Write-off of financial asset (Note 14)  
Gains arising from the sale of equity interest  
Other operation costs and expenses  
Total   175 109 144
General And Administrative Expenses [Member]        
Disclosure of disaggregation of revenue from contracts with customers [line items]        
Personnel   308 376 258
Employees’ and managers’ income sharing   4 2
Post-employment benefits (Note 24)  
Materials   40 55 18
Outsourced services   250 273 185
Depreciation and amortization   27 72 102
Operating provisions and adjustments for operating losses  
Expected credit losses of accounts receivable  
Reversal of provision for doubtful with related party - Renova  
Write-off of financial asset (Note 14)  
Gains arising from the sale of equity interest  
Other operation costs and expenses   82 9 7
Total   707 789 572
Other Operating Expenses (Revenue) [Member]        
Disclosure of disaggregation of revenue from contracts with customers [line items]        
Personnel  
Employees’ and managers’ income sharing   157 79 132
Post-employment benefits (Note 24)   591 626 15
Materials  
Outsourced services  
Depreciation and amortization  
Operating provisions and adjustments for operating losses   101 123 145
Expected credit losses of accounts receivable  
Reversal of provision for doubtful with related party - Renova   1 (54)
Write-off of financial asset (Note 14)   172
Gains arising from the sale of equity interest   (319) (52)
Other operation costs and expenses   182 182 306
Total   R$ 713 R$ 1,076 R$ 598