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INTANGIBLE ASSETS (Details) - BRL (R$)
R$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
IfrsStatementLineItems [Line Items]      
Balance at beginning R$ 10,788,054 R$ 7,657,050 R$ 7,316,794
Effect of foreign exchange differences (52,216) (3,800)  
Acquisitions and expenditures 78,238 3,329  
Transfer of property, plant and equipment 101,449 29,840  
Amortization (154,883) (102,480)  
Disposals   (63)  
Transfers to other asset categories (101,449)    
Business Combination Elizabeth   413,430  
Consolidation of acquired companies   3,158,416  
Gross carrying amount [member]      
IfrsStatementLineItems [Line Items]      
Balance at beginning 12,051,227 8,707,918 8,263,532
Accumulated depreciation and amortisation [member]      
IfrsStatementLineItems [Line Items]      
Balance at beginning (1,153,843) (941,538) (837,408)
Adjustment For Accumulated Recoverable Value [Member]      
IfrsStatementLineItems [Line Items]      
Balance at beginning (109,330) (109,330) (109,330)
Goodwill [member]      
IfrsStatementLineItems [Line Items]      
Balance at beginning 4,131,483 3,729,236 3,606,156
Transfers to other asset categories   39,814  
Business Combination Elizabeth   83,266  
Consolidation of acquired companies   402,247  
Goodwill [member] | Gross carrying amount [member]      
IfrsStatementLineItems [Line Items]      
Balance at beginning 4,371,890 3,969,643 3,846,563
Goodwill [member] | Accumulated depreciation and amortisation [member]      
IfrsStatementLineItems [Line Items]      
Balance at beginning (131,077) (131,077) (131,077)
Goodwill [member] | Adjustment For Accumulated Recoverable Value [Member]      
IfrsStatementLineItems [Line Items]      
Balance at beginning (109,330) (109,330) (109,330)
Customer-related intangible assets [member]      
IfrsStatementLineItems [Line Items]      
Balance at beginning 152,484 207,912 278,041
Effect of foreign exchange differences (26,059) (1,835)  
Amortization (63,351) (68,294)  
Consolidation of acquired companies   33,982  
Customer-related intangible assets [member] | Gross carrying amount [member]      
IfrsStatementLineItems [Line Items]      
Balance at beginning 753,307 816,206 823,540
Customer-related intangible assets [member] | Accumulated depreciation and amortisation [member]      
IfrsStatementLineItems [Line Items]      
Balance at beginning (600,823) (608,294) (545,499)
Technology-based intangible assets [member]      
IfrsStatementLineItems [Line Items]      
Balance at beginning 87,846 66,440 45,665
Effect of foreign exchange differences (544) (24)  
Acquisitions and expenditures 830 3,302  
Transfer of property, plant and equipment 30,456 29,840  
Amortization (15,344) (12,343)  
Consolidation of acquired companies   6,008  
Technology-based intangible assets [member] | Gross carrying amount [member]      
IfrsStatementLineItems [Line Items]      
Balance at beginning 296,456 221,712 182,059
Technology-based intangible assets [member] | Accumulated depreciation and amortisation [member]      
IfrsStatementLineItems [Line Items]      
Balance at beginning (208,610) (155,272) (136,394)
Brand names [member]      
IfrsStatementLineItems [Line Items]      
Balance at beginning 225,187 213,609 215,532
Effect of foreign exchange differences (25,399) (1,923)  
Amortization (1,393)    
Consolidation of acquired companies   38,370  
Brand names [member] | Gross carrying amount [member]      
IfrsStatementLineItems [Line Items]      
Balance at beginning 226,581 213,609 215,532
Brand names [member] | Accumulated depreciation and amortisation [member]      
IfrsStatementLineItems [Line Items]      
Balance at beginning (1,394)    
Licences [member]      
IfrsStatementLineItems [Line Items]      
Balance at beginning [1] 6,188,654 3,437,883 3,169,349
Acquisitions and expenditures [1] 76,764 27  
Transfer of property, plant and equipment [1] 70,993    
Amortization [1] (74,795) (21,843)  
Transfers to other asset categories [1]   (39,814)  
Business Combination Elizabeth [1]   330,164  
Consolidation of acquired companies [1]   2,677,809  
Licences [member] | Gross carrying amount [member]      
IfrsStatementLineItems [Line Items]      
Balance at beginning [1] 6,400,593 3,484,778 3,193,787
Licences [member] | Accumulated depreciation and amortisation [member]      
IfrsStatementLineItems [Line Items]      
Balance at beginning [1] (211,939) (46,895) (24,438)
Other intangible assets [member]      
IfrsStatementLineItems [Line Items]      
Balance at beginning 2,400 1,970 2,051
Effect of foreign exchange differences (214) (18)  
Acquisitions and expenditures 644    
Disposals   (63)  
Other intangible assets [member] | Gross carrying amount [member]      
IfrsStatementLineItems [Line Items]      
Balance at beginning R$ 2,400 R$ 1,970 R$ 2,051
[1] Comprised mainly of: (i) mining rights whose amortization is based on production volume and (ii) Concession agreement for the use of water resources in the acquisition of control of CEEE-G, amortized over the agreement term (note 3.c).