XML 200 R182.htm IDEA: XBRL DOCUMENT v3.21.1
25 Research and Development and Energy Efficiency (Details) - BRL (R$)
R$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
DisclosureOfResearchAndDevelopmentAndEnergyEfficiencyLineItems [Line Items]      
Amounts payable, before any related prepayments R$ 258,733    
Amounts payable to regulatory agencies 17,981    
Other amounts payable 388,297    
Research and development and energy efficiency 665,011 R$ 658,171 R$ 592,735
Research and development and energy efficiency, current 380,186 375,395  
Research and development and energy efficiency, noncurrent 284,825 282,776  
MME [member]      
DisclosureOfResearchAndDevelopmentAndEnergyEfficiencyLineItems [Line Items]      
Research and development and energy efficiency 4,041 2,023 R$ 2,361
Research and Development - R&D [member]      
DisclosureOfResearchAndDevelopmentAndEnergyEfficiencyLineItems [Line Items]      
Amounts payable, before any related prepayments 221,977    
Amounts payable to regulatory agencies 12,126    
Other amounts payable 110,769    
Research and development and energy efficiency 344,872 347,727  
Research and Development - R&D [member] | National Fund for Scientific and Technological Development - FNDCT [member]      
DisclosureOfResearchAndDevelopmentAndEnergyEfficiencyLineItems [Line Items]      
Amounts payable to regulatory agencies 8,085    
Other amounts payable    
Research and development and energy efficiency 8,085 4,046  
Research and Development - R&D [member] | MME [member]      
DisclosureOfResearchAndDevelopmentAndEnergyEfficiencyLineItems [Line Items]      
Amounts payable to regulatory agencies 4,041    
Other amounts payable    
Research and development and energy efficiency 4,041 2,023  
Research and Development - R&D [member] | R&D [member]      
DisclosureOfResearchAndDevelopmentAndEnergyEfficiencyLineItems [Line Items]      
Amounts payable, before any related prepayments 221,977    
Amounts payable to regulatory agencies    
Other amounts payable 110,769    
Research and development and energy efficiency 332,746 341,658  
EEP [member]      
DisclosureOfResearchAndDevelopmentAndEnergyEfficiencyLineItems [Line Items]      
Amounts payable, before any related prepayments 36,756    
Amounts payable to regulatory agencies 5,855    
Other amounts payable 277,528    
Research and development and energy efficiency 320,139 310,444  
EEP [member] | National Program of electricity conservation - Procel [member]      
DisclosureOfResearchAndDevelopmentAndEnergyEfficiencyLineItems [Line Items]      
Amounts payable to regulatory agencies 5,855    
Other amounts payable    
Research and development and energy efficiency 5,855 16,410  
EEP [member] | EEP [member]      
DisclosureOfResearchAndDevelopmentAndEnergyEfficiencyLineItems [Line Items]      
Amounts payable, before any related prepayments 36,756    
Amounts payable to regulatory agencies    
Other amounts payable 277,528    
Research and development and energy efficiency R$ 314,284 R$ 294,034