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Property, Plant and Equipment (Details 3) - Projects
R$ in Thousands
 12 Months Ended
Dec. 31, 2022
BRL (R$)
IfrsStatementLineItems [Line Items]  
Property, Plant and Equipment, Cost R$ 4,312,728
Property, Plant and Equipment, Depreciation (835,032)
Property, Plant and Equipment, Impairment (971,588)
Property, Plant and Equipment, Value in use 2,506,108
HPP Col?der [Member]  
IfrsStatementLineItems [Line Items]  
Property, Plant and Equipment, Cost 2,558,634
Property, Plant and Equipment, Depreciation (320,171)
Property, Plant and Equipment, Impairment (632,559)
Property, Plant and Equipment, Value in use 1,605,904
U E G A [Member]  
IfrsStatementLineItems [Line Items]  
Property, Plant and Equipment, Cost 686,498
Property, Plant and Equipment, Depreciation (384,810)
Property, Plant and Equipment, Impairment (108,132)
Property, Plant and Equipment, Value in use 193,556
Cons?rcio Tapaj?s [Member]  
IfrsStatementLineItems [Line Items]  
Property, Plant and Equipment, Cost 14,879 [1]
Property, Plant and Equipment, Depreciation [1]
Property, Plant and Equipment, Impairment (14,879) [1]
Property, Plant and Equipment, Value in use [1]
Power Plants In Parana [Member]  
IfrsStatementLineItems [Line Items]  
Property, Plant and Equipment, Cost 1,052,717
Property, Plant and Equipment, Depreciation (130,051)
Property, Plant and Equipment, Impairment (216,018)
Property, Plant and Equipment, Value in use R$ 706,648
[1] Project under development