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Schedule of financial instruments (Details) - BRL (R$) R$ in Thousands | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
IfrsStatementLineItems [Line Items] |  |
Total current financial assets at amortised cost | R$ 19,587,380 | R$ 13,328,279
Total current financial assets | 21,982,467 | 16,638,453
Total current financial assets at fair value through profit or loss | 2,395,087 | 3,310,174
Total non-current financial assets at amortised cost | 2,687,747 | 2,461,619
Total non-current financial assets | 2,878,068 | 2,521,498
Total non-current financial assets at fair value through profit or loss | 190,321 | 59,879
Total financial assets at fair value through profit or loss | 2,585,408 | 3,370,053
Total financial assets at amortised cost | 22,275,127 | 15,789,898
Total current financial liabilities at amortised cost | 17,745,619 | 10,638,642
Total current financial liabilities | 17,745,619 | 10,647,364
Total current financial liabilities at fair value through profit or loss |  | 8,722
Total non-current financial liabilities at amortised cost | 27,813,043 | 32,195,160
Total non-current financial liabilities | 27,914,865 | 32,292,695
Total non-current financial liabilities at fair value through profit or loss | 101,822 | 97,535
Total financial liabilites at fair value through profit or loss | 101,822 | 106,257
Total financial liabilities at amortised cost | 45,558,662 | 42,833,802
Total financial liabilities | 45,660,484 | 42,940,059
Dividends And Interest On Equity [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Total current financial assets at amortised cost | 76,878 | 38,088
Total current financial assets | 76,878 | 38,088
Total current financial liabilities at amortised cost | 1,206,870 | 946,133
Total current financial liabilities | 1,206,870 | 946,133
Related parties [member] |  |
IfrsStatementLineItems [Line Items] |  |
Total current financial assets | 4,511 |
Borrowings And Financing [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Total current financial liabilities at amortised cost | 5,532,736 | 4,155,483
Total current financial liabilities | 5,532,736 | 4,155,483
Total non-current financial liabilities at amortised cost | 27,221,914 | 31,215,128
Total non-current financial liabilities | 27,221,914 | 31,215,128
Trade Payables [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Total current financial liabilities at amortised cost | 6,446,999 | 4,819,539
Total current financial liabilities | 6,446,999 | 4,819,539
Total non-current financial liabilities at amortised cost | 98,625 | 543,527
Total non-current financial liabilities | 98,625 | 543,527
Trade Payables Drawee Risk [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Total current financial liabilities at amortised cost | 4,439,967 | 623,861
Total current financial liabilities | 4,439,967 | 623,861
Leases [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Total current financial liabilities at amortised cost | 119,047 | 93,626
Total current financial liabilities | 119,047 | 93,626
Total non-current financial liabilities at amortised cost | 492,504 | 436,505
Total non-current financial liabilities | 492,504 | 436,505
Cash And Cash Equivalant [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Total current financial assets at amortised cost | 16,646,480 | 9,944,586
Total current financial assets | 16,646,480 | 9,944,586
Short Term Investment [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Total current financial assets at amortised cost | 261,673 | 478,253
Total current financial assets | 2,644,732 | 3,783,362
Total current financial assets at fair value through profit or loss | 2,383,059 | 3,305,109
Trade receivables [member] |  |
IfrsStatementLineItems [Line Items] |  |
Total current financial assets at amortised cost | 2,597,838 | 2,867,352
Total current financial assets | 2,597,838 | 2,867,352
Trading securities [member] |  |
IfrsStatementLineItems [Line Items] |  |
Total current financial assets | 12,028 | 5,065
Total current financial assets at fair value through profit or loss | 12,028 | 5,065
Related parties [member] |  |
IfrsStatementLineItems [Line Items] |  |
Total current financial assets at amortised cost | 4,511 |
Total non-current financial assets at amortised cost | 1,143,228 | 966,050
Total non-current financial assets | 1,143,228 | 966,050
Investment property [member] |  |
IfrsStatementLineItems [Line Items] |  |
Total non-current financial assets at amortised cost | 147,671 | 123,409
Total non-current financial assets | 147,671 | 123,409
Other Trade Receivables [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Total non-current financial assets at amortised cost | 2,345 | 2,445
Total non-current financial assets | 2,345 | 2,445
Compulsory Loan Eletrobras [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Total non-current financial assets at amortised cost | 859,607 | 852,532
Total non-current financial assets | 859,607 | 852,532
Receivables By Indemnity [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Total non-current financial assets at amortised cost | 534,896 | 517,183
Total non-current financial assets | 534,896 | 517,183
Investment Property 1 [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Total non-current financial assets |  | 190,321
Total non-current financial assets at fair value through profit or loss | 190,321 | 59,879
Financial Investmentes [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Total non-current financial assets |  | 59,879
Derivatives [member] |  |
IfrsStatementLineItems [Line Items] |  |
Total current financial liabilities |  | 8,722
Total current financial liabilities at fair value through profit or loss |  | 8,722
Total non-current financial liabilities | 101,822 | 97,535
Total non-current financial liabilities at fair value through profit or loss | R$ 101,822 | R$ 97,535

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