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25 Research and Development and Energy Efficiency (Details 1) - BRL (R$) R$ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019
DisclosureOfChangesInResearchAndDevelopmentAndEnergyEfficiencyLineItems [Line Items] |  |
Research and development and energy efficiency, beginning | R$ 658,171 | R$ 592,735
Business combination effects |  | 1,494
Additions | 144,474 | 127,432
Performance agreement | 3,545 | 3,246
Interest rate | 12,550 | 24,570
Transfers |  |
Payments | (71,675) | (54,166)
Concluded projects | (82,054) | (37,140)
Research and development and energy efficiency, ending | 665,011 | 658,171
FNDCT [member] |  |
DisclosureOfChangesInResearchAndDevelopmentAndEnergyEfficiencyLineItems [Line Items] |  |
Research and development and energy efficiency, beginning | 4,046 | 4,725
Business combination effects |  | 20
Additions | 37,427 | 32,311
Performance agreement |  |
Interest rate |  |
Transfers |  |
Payments | (33,388) | (33,010)
Concluded projects |  |
Research and development and energy efficiency, ending | 8,085 | 4,046
MME [member] |  |
DisclosureOfChangesInResearchAndDevelopmentAndEnergyEfficiencyLineItems [Line Items] |  |
Research and development and energy efficiency, beginning | 2,023 | 2,361
Business combination effects |  | 10
Additions | 18,716 | 16,155
Performance agreement |  |
Interest rate |  |
Transfers |  |
Payments | (16,698) | (16,503)
Concluded projects |  |
Research and development and energy efficiency, ending | 4,041 | 2,023
R&D [member] |  |
DisclosureOfChangesInResearchAndDevelopmentAndEnergyEfficiencyLineItems [Line Items] |  |
Research and development and energy efficiency, beginning | 341,658 | 327,626
Business combination effects |  | 1,464
Additions | 37,426 | 32,312
Performance agreement |  |
Interest rate | 4,253 | 10,627
Transfers |  |
Payments |  |
Concluded projects | (50,591) | (30,371)
Research and development and energy efficiency, ending | 332,746 | 341,658
Procel [member] |  |
DisclosureOfChangesInResearchAndDevelopmentAndEnergyEfficiencyLineItems [Line Items] |  |
Research and development and energy efficiency, beginning | 16,410 | 15,792
Business combination effects |  |
Additions | 10,181 | 9,333
Performance agreement |  |
Interest rate | 1,469 | 51
Transfers | (616) | (3,123)
Payments | (21,589) | (5,643)
Concluded projects |  |
Research and development and energy efficiency, ending | 5,855 | 16,410
EEP [member] |  |
DisclosureOfChangesInResearchAndDevelopmentAndEnergyEfficiencyLineItems [Line Items] |  |
Research and development and energy efficiency, beginning | 294,034 | 242,231
Business combination effects |  |
Additions | 40,724 | 37,321
Performance agreement | 3,545 | 3,246
Interest rate | 6,828 | 13,892
Transfers | 616 | 3,123
Payments |  | 990
Concluded projects | (31,463) | (6,769)
Research and development and energy efficiency, ending | R$ 314,284 | R$ 294,034

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