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Intangible assets (Details 4) - BRL (R$) R$ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
IfrsStatementLineItems [Line Items] |  |  |  |
Intangible assets, beginning |  | R$ 9,215,560 |  |
Effect of acquisition of control of Vilas Complex |  |  | R$ 22,381 |
Reclassification | [1] |  | (20,366) |
Loss on disposal |  | (55,177) | (30,623) | R$ (52,811)
Intangible assets, ending |  | 10,277,727 | 9,215,560 |
Other In Service [Member] |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |
Intangible assets, beginning |  | 22,242 | 19,209 |
Effect of acquisition of control of Vilas Complex |  |  | 10,275 |
Acquisitions |  |  |  |
Transfers from property, plant and equipment |  | (9,795) | 986 |
Capitalizations for intangible in service |  | 5,561 | 4,453 |
Amortization of quotas - concession and authorization | [2] | (5,160) | (7,770) |
Amortization of quotas - PIS/Pasep and Cofins credits |  |  | (5) |
Partial division of assets |  |  | (5,047) |
Reclassification | [3] |  | 141 |
Loss on disposal |  |  |  |
Intangible assets, ending |  | 12,848 | 22,242 | 19,209
Other In Progress [Member] |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |
Intangible assets, beginning |  | 27,131 | 20,654 |
Effect of acquisition of control of Vilas Complex |  |  |  |
Acquisitions |  | 8,319 | 10,375 |
Transfers from property, plant and equipment |  |  | 482 |
Capitalizations for intangible in service |  | (5,561) | (4,453) |
Amortization of quotas - concession and authorization | [2] |  |  |
Amortization of quotas - PIS/Pasep and Cofins credits |  |  |  |
Partial division of assets |  |  | (526) |
Reclassification | [3] |  | 599 |
Loss on disposal |  | (1,559) |  |
Intangible assets, ending |  | 28,330 | 27,131 | 20,654
Other [Member] |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |
Intangible assets, beginning |  | 49,373 | 39,863 |
Effect of acquisition of control of Vilas Complex |  |  | 10,275 |
Acquisitions |  | 8,319 | 10,375 |
Transfers from property, plant and equipment |  | (9,795) | 1,468 |
Capitalizations for intangible in service |  |  |  |
Amortization of quotas - concession and authorization | [2] | (5,160) | (7,770) |
Amortization of quotas - PIS/Pasep and Cofins credits |  |  | (5) |
Partial division of assets |  |  | (5,573) |
Reclassification | [3] |  | 740 |
Loss on disposal |  | (1,559) |  |
Intangible assets, ending |  | R$ 41,178 | R$ 49,373 | R$ 39,863
[1] | Reclassification to Assets classified as held for sale (Note 39).
[2] | Annual amortization rate: 20%.
[3] | Reclassification to Assets classified as held for sale (Note 39).

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