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32 Operating Costs and Expenses (Details 4) - BRL (R$) R$ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Disclosure of operating costs and expenses [line items] |  |  |
Credit losses, provisions and reversals | R$ 237,294 |  |
Restated [Member] |  |  |
Disclosure of operating costs and expenses [line items] |  |  |
Credit losses, provisions and reversals |  | R$ 260,051 | R$ 281,104
Provision for litigations [member] |  |  |
Disclosure of operating costs and expenses [line items] |  |  |
Credit losses, provisions and reversals | 150,269 |  |
Provision for litigations [member] | Restated [Member] |  |  |
Disclosure of operating costs and expenses [line items] |  |  |
Credit losses, provisions and reversals |  | 243,848 | 206,792
Power generation concession contract [member] |  |  |
Disclosure of operating costs and expenses [line items] |  |  |
Credit losses, provisions and reversals | (10,502) |  |
Power generation concession contract [member] | Restated [Member] |  |  |
Disclosure of operating costs and expenses [line items] |  |  |
Credit losses, provisions and reversals |  | (2,945) | (4,758)
Property plant and equipment generation segment [member] |  |  |
Disclosure of operating costs and expenses [line items] |  |  |
Credit losses, provisions and reversals | (37,609) |  |
Property plant and equipment generation segment [member] | Restated [Member] |  |  |
Disclosure of operating costs and expenses [line items] |  |  |
Credit losses, provisions and reversals |  | (117,744) | (14,162)
Expected credit losses (trade accounts and other receivables) [member] |  |  |
Disclosure of operating costs and expenses [line items] |  |  |
Credit losses, provisions and reversals | 128,466 |  |
Expected credit losses (trade accounts and other receivables) [member] | Restated [Member] |  |  |
Disclosure of operating costs and expenses [line items] |  |  |
Credit losses, provisions and reversals |  | 140,348 | 83,453
Tax credits estimated losses [member] |  |  |
Disclosure of operating costs and expenses [line items] |  |  |
Credit losses, provisions and reversals | (1,298) |  |
Tax credits estimated losses [member] | Restated [Member] |  |  |
Disclosure of operating costs and expenses [line items] |  |  |
Credit losses, provisions and reversals |  | (3,456) | 9,779
Provision for losses on equity interests [member] |  |  |
Disclosure of operating costs and expenses [line items] |  |  |
Credit losses, provisions and reversals | R$ 7,968 |  |
Provision for losses on equity interests [member] | Restated [Member] |  |  |
Disclosure of operating costs and expenses [line items] |  |  |
Credit losses, provisions and reversals |  |  |

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