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Schedule of fair value of derivative hedge instrument One (Details) - BRL (R$) R$ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020
IfrsStatementLineItems [Line Items] |  |
Total |  | R$ 2
Total | 93 | R$ 101
Income and Social Contribution taxes on restatement of defined benefit plans |  |
IfrsStatementLineItems [Line Items] |  |
Loans and financings (note 22) | (5,623) |
Suppliers (Itaipu Binacional) (note 20) | (331) |
Total | (5,954) |
Net liabilities exposed | (5,954) |
Probable Scenario [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Loans and financings (note 22) | (5,139) |
Suppliers (Itaipu Binacional) (note 20) | (303) |
Total | (5,442) |
Net liabilities exposed | (5,442) |
Net effect of exchange rate fluctuation | 512 |
Possible Scenario Appreciation [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Loans and financings (note 22) | (6,429) |
Suppliers (Itaipu Binacional) (note 20) | (378) |
Total | (6,807) |
Net liabilities exposed | (6,807) |
Net effect of exchange rate fluctuation | (853) |
Remote Scenario Appreciation [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Loans and financings (note 22) | (7,709) |
Suppliers (Itaipu Binacional) (note 20) | (454) |
Total | (8,163) |
Net liabilities exposed | (8,163) |
Net effect of exchange rate fluctuation | R$ (2,209) |

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