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Schedule of energy development account - CDE (Details) - BRL (R$) R$ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
IfrsStatementLineItems [Line Items] |  |  |
Regulatory charges | R$ 1,737,716 | R$ 1,530,998 | R$ 1,654,157
National Electric Energy Agency [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Regulatory charges |  |  | 1,266,152
National Electric Energy Agency One [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Regulatory charges |  |  | 348,177
National Electric Energy Agency Two [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Regulatory charges |  |  | R$ 39,828
Resolution No 28142020 [Member] | National Electric Energy Agency [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Resolutions | Resolution No. 2,814/2020 |  |
Period | January |  |
Regulatory charges | R$ 163,843 |  |
Resolution No 28142021 [Member] | National Electric Energy Agency [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Resolutions | Resolution No. 2,814/2021 |  |
Period | February |  |
Regulatory charges | R$ 157,766 |  |
Resolution No 283420211 [Member] | National Electric Energy Agency [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Resolutions | Resolution No. 2,834/2021 |  |
Resolution No 283412021 [Member] | National Electric Energy Agency [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Period | March and April |  |
Regulatory charges | R$ 277,844 |  |
Resolution No 286422021 [Member] | National Electric Energy Agency [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Resolutions | Resolution No. 2,864/2021 |  |
Period | May to December |  |
Regulatory charges | R$ 935,037 |  |
Order No 9392021 [Member] | National Electric Energy Agency [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Resolutions | Order No. 939/2021 |  |
Period | June to December |  |
Regulatory charges | R$ 107,009 |  |
Oder One [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Regulatory charges | R$ 1,641,499 |  |
Order No 93912021 [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Period | June to December |  |
Regulatory charges | R$ 96,217 |  |
Order No 93912021 [Member] | National Electric Energy Agency [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Resolutions | Order No. 939/2021 |  |
Resolution No 26642019 [Member] | National Electric Energy Agency [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Resolutions |  | Resolution No. 2,664/2019 |
Period |  | January to December |
Regulatory charges |  | R$ 1,531,713 |
Preliminary Injunctions [Member] | National Electric Energy Agency [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Resolutions |  | (-) Preliminary injunctions |
Period |  | January to December |
Regulatory charges |  | R$ (715) |
Resolution No 25102018 [Member] | National Electric Energy Agency [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Resolutions |  |  | Resolution No. 2,510/2018
Period |  |  | January to June
Regulatory charges |  |  | R$ 1,269,498
Preliminary Injunctions 1 [Member] | National Electric Energy Agency [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Resolutions |  |  | (-) Preliminary injunctions
Period |  |  | January to June
Regulatory charges |  |  | R$ (3,346)
Resolution No 22312017 [Member] | National Electric Energy Agency [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Resolutions |  |  | Resolution No. 2,231/2017
Period |  |  | June to February
Regulatory charges |  |  | R$ 98,725
Resolution No 25212019 [Member] | National Electric Energy Agency [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Resolutions |  |  | Resolution No. 2,521/2019
Period |  |  | March to August
Regulatory charges |  |  | R$ 296,174
Return Order No 27552019 [Member] | National Electric Energy Agency [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Resolutions |  |  | Return - Order No. 2,755/2019
Regulatory charges |  |  | R$ (46,722)
Resolution No 251012018 [Member] | National Electric Energy Agency [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Resolutions |  |  | Resolution No. 2,510/2018
Period |  |  | January to March
Regulatory charges |  |  | R$ 41,431
Preliminary Injunctions 2 [Member] | National Electric Energy Agency [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Resolutions |  |  | (-) Preliminary injunctions
Period |  |  | January to March
Regulatory charges |  |  | R$ (1,603)

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