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INTANGIBLE ASSETS - Movements (Details) - BRL (R$)
R$ in Thousands
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Disclosure of reconciliation of changes in intangible assets and goodwill      
Opening balance R$ 79,866,241 R$ 79,980,581  
Acquisition of Control Invested   1,266,650  
Additions 449,060 288,876  
Write-offs/Reversals (71,462)    
Casualties   (57,754)  
Amortizations (2,027,350) (1,638,807)  
Transfers to Assets Held for Sale (51,804) (1,675)  
Transfers 8,588 28,370  
Closing balance 78,173,273 79,866,241 R$ 79,980,581
Cost      
Disclosure of reconciliation of changes in intangible assets and goodwill      
Opening balance 83,867,468 82,334,412  
Closing balance 84,180,396 83,867,468 82,334,412
Accumulated Depreciation and Impairment      
Disclosure of reconciliation of changes in intangible assets and goodwill      
Opening balance (4,001,227) (2,353,831)  
Closing balance (6,007,123) (4,001,227) (2,353,831)
Impairment      
Disclosure of reconciliation of changes in intangible assets and goodwill      
Opening balance (43,654) (119,133)  
Casualties   76,378  
Transfers to Assets Held for Sale   460  
Transfers 7,078 (1,359)  
Closing balance (36,576) R$ (43,654) R$ (119,133)
Concession Rights      
Disclosure of reconciliation of changes in intangible assets and goodwill      
Average depreciation rate per year (%)   2.42% 3.30%
Opening balance 78,691,708 R$ 79,115,473  
Acquisition of Control Invested   1,188,150  
Additions   938  
Write-offs/Reversals (17,358)    
Casualties   (59,325)  
Amortizations (1,934,243) (1,584,994)  
Transfers to Assets Held for Sale (35,533)    
Transfers 14,273 31,466  
Closing balance 76,718,847 78,691,708 R$ 79,115,473
Concession Rights | Cost      
Disclosure of reconciliation of changes in intangible assets and goodwill      
Opening balance 81,960,541 80,725,923  
Closing balance 81,916,771 81,960,541 80,725,923
Concession Rights | Accumulated Depreciation and Impairment      
Disclosure of reconciliation of changes in intangible assets and goodwill      
Opening balance (3,268,833) (1,610,450)  
Closing balance (5,197,924) R$ (3,268,833) R$ (1,610,450)
Software      
Disclosure of reconciliation of changes in intangible assets and goodwill      
Average depreciation rate per year (%)   6.54% 20.00%
Opening balance 269,993 R$ 112,533  
Acquisition of Control Invested   231  
Additions 3,601 1,225  
Write-offs/Reversals (52,073)    
Casualties   (618)  
Amortizations (49,655) (17,733)  
Transfers to Assets Held for Sale   (295)  
Transfers 348,144 174,650  
Closing balance 520,010 269,993 R$ 112,533
Software | Cost      
Disclosure of reconciliation of changes in intangible assets and goodwill      
Opening balance 633,504 473,331  
Closing balance 929,008 633,504 473,331
Software | Accumulated Depreciation and Impairment      
Disclosure of reconciliation of changes in intangible assets and goodwill      
Opening balance (363,511) (360,798)  
Closing balance (408,998) R$ (363,511) R$ (360,798)
Use of the public property      
Disclosure of reconciliation of changes in intangible assets and goodwill      
Average depreciation rate per year (%)   2.36% 3.30%
Opening balance 215,349 R$ 217,804  
Acquisition of Control Invested   4,635  
Additions 208 995  
Amortizations (7,938) (8,085)  
Transfers to Assets Held for Sale (10,770)    
Transfers 415    
Closing balance 197,264 215,349 R$ 217,804
Use of the public property | Cost      
Disclosure of reconciliation of changes in intangible assets and goodwill      
Opening balance 314,044 306,888  
Closing balance 298,841 314,044 306,888
Use of the public property | Accumulated Depreciation and Impairment      
Disclosure of reconciliation of changes in intangible assets and goodwill      
Opening balance (98,695) (89,084)  
Closing balance (101,577) (98,695) (89,084)
Intangible assets in progress      
Disclosure of reconciliation of changes in intangible assets and goodwill      
Opening balance 562,560 505,533  
Acquisition of Control Invested   867  
Additions 391,046 233,689  
Write-offs/Reversals (1,232)    
Casualties   (179)  
Transfers to Assets Held for Sale   (2,173)  
Transfers (342,468) (175,177)  
Closing balance 609,906 562,560 505,533
Intangible assets in progress | Cost      
Disclosure of reconciliation of changes in intangible assets and goodwill      
Opening balance 562,560 505,533  
Closing balance 609,906 R$ 562,560 R$ 505,533
Others      
Disclosure of reconciliation of changes in intangible assets and goodwill      
Average depreciation rate per year (%)   1.03% 3.40%
Opening balance 170,285 R$ 148,371  
Acquisition of Control Invested   72,767  
Additions 54,205 52,029  
Write-offs/Reversals (799)    
Casualties   (74,010)  
Amortizations (35,514) (27,995)  
Transfers to Assets Held for Sale (5,501) 333  
Transfers (18,854) (1,210)  
Closing balance 163,822 170,285 R$ 148,371
Others | Cost      
Disclosure of reconciliation of changes in intangible assets and goodwill      
Opening balance 396,819 322,737  
Closing balance 425,870 396,819 322,737
Others | Accumulated Depreciation and Impairment      
Disclosure of reconciliation of changes in intangible assets and goodwill      
Opening balance (226,534) (174,366)  
Closing balance R$ (262,048) R$ (226,534) R$ (174,366)