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BUSINESS COMBINATION (Details 12)
R$ in Thousands
12 Months Ended
Dec. 31, 2022
BRL (R$)
Carrying amount [member] | Companhia Energetica Chapeco [Member]  
IfrsStatementLineItems [Line Items]  
Cash and cash equivalents R$ 41,693
Trade receivables 5,745
Other assets  246
Recoverable taxes and contributions 5,420
Deferred taxes 9,521
Judicial deposits 151
Property, plant and equipment 106,695
Intangíible assets  104,499
 Total assets acquired  273,970
Trade payables 157
Labor obligations 364
Taxes payable 1,945
Concession payable 12,281
Other accounts 1,567
Advances from customer 100,012
Concession payable 77,646
 Total liabilities assumed  193,972
  Total equity acquired   79,998
Fair Value Adjustments [Member] | Companhia Energetica Chapeco [Member]  
IfrsStatementLineItems [Line Items]  
Property, plant and equipment 195,026
Intangíible assets  83,610
 Total assets acquired  278,636
  Total equity acquired   278,636
Total Fair Value [Member] | Companhia Energetica Chapeco [Member]  
IfrsStatementLineItems [Line Items]  
Cash and cash equivalents 41,693
Trade receivables 5,745
Other assets  246
Recoverable taxes and contributions 5,420
Deferred taxes 9,521
Judicial deposits 151
Property, plant and equipment 301,721
Intangíible assets  188,109
 Total assets acquired  552,606
Trade payables 157
Labor obligations 364
Taxes payable 1,945
Concession payable 12,281
Other accounts 1,567
Advances from customer 100,012
Concession payable 77,646
 Total liabilities assumed  193,972
  Total equity acquired   R$ 358,634
Business Property Plant And Equipment 1 [Member]  
IfrsStatementLineItems [Line Items]  
Description of basis of valuation of assets available for benefits The values of fixed assets were adjusted by the difference between the revalued value of fixed assets and their respective net book value, according to a technical evaluation carried out by an independent appraiser for the groups of assets represented by improvements constructions, vehicles, furniture and fixtures. The useful lives follow the terms disclosed in note 12.
Business Property Plant And Equipment 1 [Member] | Companhia Energetica Chapeco [Member]  
IfrsStatementLineItems [Line Items]  
Description of basis of valuation of assets available for benefits The values of fixed assets were adjusted by the difference between the revalued value of fixed assets and their respective net book value, according to a technical evaluation carried out by an independent appraiser for the groups of assets represented by buildings, vehicles, furniture and fixtures. The useful lives follow the terms disclosed in note 11
Carrying Amount 1 [Member] | Companhia Energetica Chapeco [Member]  
IfrsStatementLineItems [Line Items]  
Property, plant and equipment R$ 106,695
Intangible assets 104,499
Fair Value Adjustments 1 [Member] | Companhia Energetica Chapeco [Member]  
IfrsStatementLineItems [Line Items]  
Property, plant and equipment 195,026
Total Fair Value 1 [Member] | Companhia Energetica Chapeco [Member]  
IfrsStatementLineItems [Line Items]  
Property, plant and equipment R$ 301,721
Intangible Assets 1 [Member]  
IfrsStatementLineItems [Line Items]  
Description of basis of valuation of assets available for benefits Evaluated by the MPEEM method that measures the present value of future income to be generated during the remaining useful life of a given asset. Using the analysis of the company's projected results as a reference, the pre-tax cash flows directly attributable to the asset are calculated, as of the base date stipulated in the evaluation.
Intangible Assets 1 [Member] | Companhia Energetica Chapeco [Member]  
IfrsStatementLineItems [Line Items]  
Description of basis of valuation of assets available for benefits Evaluated by the MPEEM method that measures the present value of future income to be generated during the remaining useful life of a given asset. Using the analysis of the company's projected results as a reference, the pre-tax cash flows directly attributable to the asset are calculated, as from the base date stipulated in the evaluation and Incremental Cash Flow, where the economic gain generated by the spread between the contract value and the spot value of energy was the basis of a free cash flow.
Fair Value Adjustments 2 [Member] | Companhia Energetica Chapeco [Member]  
IfrsStatementLineItems [Line Items]  
Intangible assets R$ 83,610
Total Fair Value 2 [Member] | Companhia Energetica Chapeco [Member]  
IfrsStatementLineItems [Line Items]  
Intangible assets 188,109
Carrying Amount One [Member]  
IfrsStatementLineItems [Line Items]  
Total 201,424
Carrying Amount One [Member] | Companhia Energetica Chapeco [Member]  
IfrsStatementLineItems [Line Items]  
Total 211,194
Fair Value Adjustments One [Member]  
IfrsStatementLineItems [Line Items]  
Total 259,602
Fair Value Adjustments One [Member] | Companhia Energetica Chapeco [Member]  
IfrsStatementLineItems [Line Items]  
Total 278,636
Total Fair Value One [Member]  
IfrsStatementLineItems [Line Items]  
Total 461,026
Total Fair Value One [Member] | Companhia Energetica Chapeco [Member]  
IfrsStatementLineItems [Line Items]  
Total R$ 489,830