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Schedule of changes in intangible assets (Details) - BRL (R$) R$ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
IfrsStatementLineItems [Line Items] |  |  |
Intangible assets, beginning | R$ 6,929,456 |  |
Loss on disposal | (30,623) | R$ (52,811) | R$ (26,368)
Intangible assets, ending | 9,215,560 | 6,929,456 |
Distribution Concession Agreement In Service [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Intangible assets, beginning | 8,953,486 | 8,487,265 |
Transfers from accounts receivable - concessions |  | 99 |
Transfers from contract assets | 943,905 | 1,016,482 |
Transfers to other receivables | (3,563) | (1,372) |
Amortization of quotas - concession and authorization | (522,525) | (485,677) |
Amortization of quotas - PIS/Pasep and Cofins credits | (10,363) | (10,655) |
Loss on disposal | (30,623) | (52,656) |
Intangible assets, ending | 9,330,317 | 8,953,486 | 8,487,265
Distribution Concession Agreement Special Liabilities In Service [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Intangible assets, beginning | (2,750,099) | (2,783,579) |
Transfers from accounts receivable - concessions | (8,385) |  |
Transfers from contract assets | (122,346) | (105,116) |
Amortization of quotas - concession and authorization | 146,697 | 138,596 |
Intangible assets, ending | (2,734,133) | (2,750,099) | (2,783,579)
Distribution Concession Agreement [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Intangible assets, beginning | 6,203,387 | 5,703,686 |
Transfers from accounts receivable - concessions | (8,385) | 99 |
Transfers from contract assets | 821,559 | 911,366 |
Transfers to other receivables | (3,563) | (1,372) |
Amortization of quotas - concession and authorization | (375,828) | (347,081) |
Amortization of quotas - PIS/Pasep and Cofins credits | (10,363) | (10,655) |
Loss on disposal | (30,623) | (52,656) |
Intangible assets, ending | R$ 6,596,184 | R$ 6,203,387 | R$ 5,703,686

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