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Research and Development and Energy Efficiency (Details 1) - BRL (R$) R$ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022
IfrsStatementLineItems [Line Items] |  |
Beginning balance | R$ 614,758 | R$ 627,097
Additions | 161,039 | 154,138
Performance agreement | 4,420 | 2,552
Interest rate (Note 34) | 27,001 | 34,644
Transfers | 10,441 |
Payments | (96,092) | (117,187)
Concluded projects (Note 12 - a) | (159,203) | (86,486)
Reclassification | (8,690) |
Ending balance | 553,674 | 614,758
F N D C T [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Beginning balance | 6,588 | 7,584
Additions | 40,011 | 39,044
Performance agreement |  |
Interest rate (Note 34) |  |
Transfers | 5,802 |
Payments | (46,620) | (40,040)
Concluded projects (Note 12 - a) |  |
Reclassification |  |
Ending balance | 5,781 | 6,588
M M E [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Beginning balance | 3,314 | 3,790
Additions | 20,004 | 19,535
Performance agreement |  |
Interest rate (Note 34) |  |
Transfers | 2,900 |
Payments | (23,327) | (20,011)
Concluded projects (Note 12 - a) |  |
Reclassification |  |
Ending balance | 2,891 | 3,314
R And D [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Beginning balance | 260,243 | 286,029
Additions | 40,019 | 39,070
Performance agreement |  |
Interest rate (Note 34) | 5,930 | 6,197
Transfers | 1,739 |
Payments | (9,695) | (8,061)
Concluded projects (Note 12 - a) | (87,675) | (62,992)
Reclassification | (8,690) |
Ending balance | 201,871 | 260,243
Procel [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Beginning balance | 11,960 | 19,883
Additions | 12,200 | 11,298
Performance agreement |  |
Interest rate (Note 34) | (547) | 3,799
Transfers |  | (3,685)
Payments |  | (19,335)
Concluded projects (Note 12 - a) |  |
Reclassification |  |
Ending balance | 23,613 | 11,960
Energy Efficiency Program [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Beginning balance | 332,653 | 309,811
Additions | 48,805 | 45,191
Performance agreement | 4,420 | 2,552
Interest rate (Note 34) | 21,618 | 24,648
Transfers |  | 3,685
Payments | (16,450) | (29,740)
Concluded projects (Note 12 - a) | (71,528) | (23,494)
Reclassification |  |
Ending balance | R$ 319,518 | R$ 332,653

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