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v3.25.1

Research and Development and Energy Efficiency (Details 1) - BRL (R$) R$ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023
Disclosure of fair value measurement of liabilities [line items] |  |
Beginning balance | R$ 553,674 | R$ 614,758
Additions | 174,616 | 161,039
Performance agreement | 7,059 | 4,420
Interest rate (Note 32) | 22,050 | 26,009
Transfers | 0 | 10,441
Payments | (151,804) | (96,092)
Concluded projects | (185,152) | (159,203)
Reclassification |  | (7,698)
Ending balance | 420,443 | 553,674
F N D C T [Member] |  |
Disclosure of fair value measurement of liabilities [line items] |  |
Beginning balance | 5,781 | 6,588
Additions | 41,949 | 40,011
Performance agreement | 0 | 0
Interest rate (Note 32) | 0 | 0
Transfers | 0 | 5,802
Payments | (40,513) | (46,620)
Concluded projects | 0 | 0
Reclassification |  | 0
Ending balance | 7,217 | 5,781
M M E [Member] |  |
Disclosure of fair value measurement of liabilities [line items] |  |
Beginning balance | 2,891 | 3,314
Additions | 20,973 | 20,004
Performance agreement | 0 | 0
Interest rate (Note 32) | 0 | 0
Transfers | 0 | 2,900
Payments | (20,256) | (23,327)
Concluded projects | 0 | 0
Reclassification |  | 0
Ending balance | 3,608 | 2,891
R And D [Member] |  |
Disclosure of fair value measurement of liabilities [line items] |  |
Beginning balance | 201,871 | 260,243
Additions | 41,960 | 40,019
Performance agreement | 0 | 0
Interest rate (Note 32) | 4,452 | 4,938
Transfers | 0 | 1,739
Payments | (11,252) | (9,695)
Concluded projects | (127,798) | (87,675)
Reclassification |  | (7,698)
Ending balance | 109,233 | 201,871
Procel [Member] |  |
Disclosure of fair value measurement of liabilities [line items] |  |
Beginning balance | 23,613 | 11,960
Additions | 13,947 | 12,200
Performance agreement | 0 | 0
Interest rate (Note 32) | 1,495 | (547)
Transfers | (4,066) | 0
Payments | (30,667) | 0
Concluded projects | 0 | 0
Reclassification |  | 0
Ending balance | 4,322 | 23,613
Energy Efficiency Program [Member] |  |
Disclosure of fair value measurement of liabilities [line items] |  |
Beginning balance | 319,518 | 332,653
Additions | 55,787 | 48,805
Performance agreement | 7,059 | 4,420
Interest rate (Note 32) | 16,103 | 21,618
Transfers | 4,066 | 0
Payments | (49,116) | (16,450)
Concluded projects | (57,354) | (71,528)
Reclassification |  | 0
Ending balance | R$ 296,063 | R$ 319,518

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