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7 Trade Accounts Receivable (Details) - BRL (R$) R$ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
TradeAndOtherReceivablesLineItems [Line Items] |  |
Trade Accounts Receivable | R$ 3,819,680 | R$ 3,182,567
Current | 3,768,242 | 3,120,168
Noncurrent | 51,438 | 62,399
Balance falling due [member] |  |
TradeAndOtherReceivablesLineItems [Line Items] |  |
Trade Accounts Receivable | 3,368,640 |
Overdue up to 90 days [member] |  |
TradeAndOtherReceivablesLineItems [Line Items] |  |
Trade Accounts Receivable | 349,187 |
2021 [member] |  |
TradeAndOtherReceivablesLineItems [Line Items] |  |
Trade Accounts Receivable | 101,853 |
Customers [member] |  |
TradeAndOtherReceivablesLineItems [Line Items] |  |
Trade Accounts Receivable | 2,743,508 | 2,498,744
Customers [member] | Balance falling due [member] |  |
TradeAndOtherReceivablesLineItems [Line Items] |  |
Trade Accounts Receivable | 2,087,435 |
Customers [member] | Overdue up to 90 days [member] |  |
TradeAndOtherReceivablesLineItems [Line Items] |  |
Trade Accounts Receivable | 356,605 |
Customers [member] | 2021 [member] |  |
TradeAndOtherReceivablesLineItems [Line Items] |  |
Trade Accounts Receivable | 299,468 |
Customers [member] | Residential [member] |  |
TradeAndOtherReceivablesLineItems [Line Items] |  |
Trade Accounts Receivable | 639,424 | 579,715
Customers [member] | Residential [member] | Balance falling due [member] |  |
TradeAndOtherReceivablesLineItems [Line Items] |  |
Trade Accounts Receivable | 388,190 |
Customers [member] | Residential [member] | Overdue up to 90 days [member] |  |
TradeAndOtherReceivablesLineItems [Line Items] |  |
Trade Accounts Receivable | 211,050 |
Customers [member] | Residential [member] | 2021 [member] |  |
TradeAndOtherReceivablesLineItems [Line Items] |  |
Trade Accounts Receivable | 40,184 |
Customers [member] | Industrial [member] |  |
TradeAndOtherReceivablesLineItems [Line Items] |  |
Trade Accounts Receivable | 312,302 | 298,719
Customers [member] | Industrial [member] | Balance falling due [member] |  |
TradeAndOtherReceivablesLineItems [Line Items] |  |
Trade Accounts Receivable | 213,229 |
Customers [member] | Industrial [member] | Overdue up to 90 days [member] |  |
TradeAndOtherReceivablesLineItems [Line Items] |  |
Trade Accounts Receivable | 21,048 |
Customers [member] | Industrial [member] | 2021 [member] |  |
TradeAndOtherReceivablesLineItems [Line Items] |  |
Trade Accounts Receivable | 78,025 |
Customers [member] | Commercial [member] |  |
TradeAndOtherReceivablesLineItems [Line Items] |  |
Trade Accounts Receivable | 335,439 | 363,986
Customers [member] | Commercial [member] | Balance falling due [member] |  |
TradeAndOtherReceivablesLineItems [Line Items] |  |
Trade Accounts Receivable | 255,691 |
Customers [member] | Commercial [member] | Overdue up to 90 days [member] |  |
TradeAndOtherReceivablesLineItems [Line Items] |  |
Trade Accounts Receivable | 51,502 |
Customers [member] | Commercial [member] | 2021 [member] |  |
TradeAndOtherReceivablesLineItems [Line Items] |  |
Trade Accounts Receivable | 28,246 |
Customers [member] | Rural [member] |  |
TradeAndOtherReceivablesLineItems [Line Items] |  |
Trade Accounts Receivable | 109,651 | 103,271
Customers [member] | Rural [member] | Balance falling due [member] |  |
TradeAndOtherReceivablesLineItems [Line Items] |  |
Trade Accounts Receivable | 87,666 |
Customers [member] | Rural [member] | Overdue up to 90 days [member] |  |
TradeAndOtherReceivablesLineItems [Line Items] |  |
Trade Accounts Receivable | 21,676 |
Customers [member] | Rural [member] | 2021 [member] |  |
TradeAndOtherReceivablesLineItems [Line Items] |  |
Trade Accounts Receivable | 309 |
Customers [member] | Public entities [member] |  |
TradeAndOtherReceivablesLineItems [Line Items] |  |
Trade Accounts Receivable | 37,370 | 55,847
Customers [member] | Public entities [member] | Balance falling due [member] |  |
TradeAndOtherReceivablesLineItems [Line Items] |  |
Trade Accounts Receivable | 32,687 |
Customers [member] | Public entities [member] | Overdue up to 90 days [member] |  |
TradeAndOtherReceivablesLineItems [Line Items] |  |
Trade Accounts Receivable | 1,646 |
Customers [member] | Public entities [member] | 2021 [member] |  |
TradeAndOtherReceivablesLineItems [Line Items] |  |
Trade Accounts Receivable | 3,037 |
Customers [member] | Public lighting [member] |  |
TradeAndOtherReceivablesLineItems [Line Items] |  |
Trade Accounts Receivable | 46,615 | 38,523
Customers [member] | Public lighting [member] | Balance falling due [member] |  |
TradeAndOtherReceivablesLineItems [Line Items] |  |
Trade Accounts Receivable | 42,319 |
Customers [member] | Public lighting [member] | Overdue up to 90 days [member] |  |
TradeAndOtherReceivablesLineItems [Line Items] |  |
Trade Accounts Receivable | 4,296 |
Customers [member] | Public lighting [member] | 2021 [member] |  |
TradeAndOtherReceivablesLineItems [Line Items] |  |
Trade Accounts Receivable |  |
Customers [member] | Public service [member] |  |
TradeAndOtherReceivablesLineItems [Line Items] |  |
Trade Accounts Receivable | 41,812 | 44,983
Customers [member] | Public service [member] | Balance falling due [member] |  |
TradeAndOtherReceivablesLineItems [Line Items] |  |
Trade Accounts Receivable | 40,856 |
Customers [member] | Public service [member] | Overdue up to 90 days [member] |  |
TradeAndOtherReceivablesLineItems [Line Items] |  |
Trade Accounts Receivable | 658 |
Customers [member] | Public service [member] | 2021 [member] |  |
TradeAndOtherReceivablesLineItems [Line Items] |  |
Trade Accounts Receivable | 298 |
Customers [member] | Unbilled - captives [member] |  |
TradeAndOtherReceivablesLineItems [Line Items] |  |
Trade Accounts Receivable | 583,209 | 516,203
Customers [member] | Unbilled - captives [member] | Balance falling due [member] |  |
TradeAndOtherReceivablesLineItems [Line Items] |  |
Trade Accounts Receivable | 583,209 |
Customers [member] | Unbilled - captives [member] | Overdue up to 90 days [member] |  |
TradeAndOtherReceivablesLineItems [Line Items] |  |
Trade Accounts Receivable |  |
Customers [member] | Unbilled - captives [member] | 2021 [member] |  |
TradeAndOtherReceivablesLineItems [Line Items] |  |
Trade Accounts Receivable |  |
Customers [member] | Energy installments plan - captives [member] |  |
TradeAndOtherReceivablesLineItems [Line Items] |  |
Trade Accounts Receivable | 291,847 | 204,192
Customers [member] | Energy installments plan - captives [member] | Balance falling due [member] |  |
TradeAndOtherReceivablesLineItems [Line Items] |  |
Trade Accounts Receivable | 206,170 |
Customers [member] | Energy installments plan - captives [member] | Overdue up to 90 days [member] |  |
TradeAndOtherReceivablesLineItems [Line Items] |  |
Trade Accounts Receivable | 20,011 |
Customers [member] | Energy installments plan - captives [member] | 2021 [member] |  |
TradeAndOtherReceivablesLineItems [Line Items] |  |
Trade Accounts Receivable | 65,666 |
Customers [member] | Low income subsidy-eletrobras [member] |  |
TradeAndOtherReceivablesLineItems [Line Items] |  |
Trade Accounts Receivable | 13,783 | 12,174
Customers [member] | Low income subsidy-eletrobras [member] | Balance falling due [member] |  |
TradeAndOtherReceivablesLineItems [Line Items] |  |
Trade Accounts Receivable | 13,783 |
Customers [member] | Low income subsidy-eletrobras [member] | Overdue up to 90 days [member] |  |
TradeAndOtherReceivablesLineItems [Line Items] |  |
Trade Accounts Receivable |  |
Customers [member] | Low income subsidy-eletrobras [member] | 2021 [member] |  |
TradeAndOtherReceivablesLineItems [Line Items] |  |
Trade Accounts Receivable |  |
Customers [member] | Other receivables [member] |  |
TradeAndOtherReceivablesLineItems [Line Items] |  |
Trade Accounts Receivable | 168,270 | 148,375
Customers [member] | Other receivables [member] | Balance falling due [member] |  |
TradeAndOtherReceivablesLineItems [Line Items] |  |
Trade Accounts Receivable | 62,362 |
Customers [member] | Other receivables [member] | Overdue up to 90 days [member] |  |
TradeAndOtherReceivablesLineItems [Line Items] |  |
Trade Accounts Receivable | 23,105 |
Customers [member] | Other receivables [member] | 2021 [member] |  |
TradeAndOtherReceivablesLineItems [Line Items] |  |
Trade Accounts Receivable | 82,803 |
Customers [member] | Free consumers [member] |  |
TradeAndOtherReceivablesLineItems [Line Items] |  |
Trade Accounts Receivable | 163,786 | 132,756
Customers [member] | Free consumers [member] | Balance falling due [member] |  |
TradeAndOtherReceivablesLineItems [Line Items] |  |
Trade Accounts Receivable | 161,273 |
Customers [member] | Free consumers [member] | Overdue up to 90 days [member] |  |
TradeAndOtherReceivablesLineItems [Line Items] |  |
Trade Accounts Receivable | 1,613 |
Customers [member] | Free consumers [member] | 2021 [member] |  |
TradeAndOtherReceivablesLineItems [Line Items] |  |
Trade Accounts Receivable | 900 |
Concessionaires, permission holder and trading companies [member] | Regulated contracts [member] |  |
TradeAndOtherReceivablesLineItems [Line Items] |  |
Trade Accounts Receivable | 170,951 | 159,492
Concessionaires, permission holder and trading companies [member] | Regulated contracts [member] | Balance falling due [member] |  |
TradeAndOtherReceivablesLineItems [Line Items] |  |
Trade Accounts Receivable | 162,290 |
Concessionaires, permission holder and trading companies [member] | Regulated contracts [member] | Overdue up to 90 days [member] |  |
TradeAndOtherReceivablesLineItems [Line Items] |  |
Trade Accounts Receivable | 1,792 |
Concessionaires, permission holder and trading companies [member] | Regulated contracts [member] | 2021 [member] |  |
TradeAndOtherReceivablesLineItems [Line Items] |  |
Trade Accounts Receivable | 6,869 |
Concessionaires, permission holder and trading companies [member] | Bilateral contracts [member] |  |
TradeAndOtherReceivablesLineItems [Line Items] |  |
Trade Accounts Receivable | 265,432 | 191,463
Concessionaires, permission holder and trading companies [member] | Bilateral contracts [member] | Balance falling due [member] |  |
TradeAndOtherReceivablesLineItems [Line Items] |  |
Trade Accounts Receivable | 265,432 |
Concessionaires, permission holder and trading companies [member] | Bilateral contracts [member] | Overdue up to 90 days [member] |  |
TradeAndOtherReceivablesLineItems [Line Items] |  |
Trade Accounts Receivable |  |
Concessionaires, permission holder and trading companies [member] | Bilateral contracts [member] | 2021 [member] |  |
TradeAndOtherReceivablesLineItems [Line Items] |  |
Trade Accounts Receivable |  |
Concessionaires, permission holder and trading companies [member] | CCEE [member] |  |
TradeAndOtherReceivablesLineItems [Line Items] |  |
Trade Accounts Receivable | 652,904 | 315,712
Concessionaires, permission holder and trading companies [member] | CCEE [member] | Balance falling due [member] |  |
TradeAndOtherReceivablesLineItems [Line Items] |  |
Trade Accounts Receivable | 533,223 |
Concessionaires, permission holder and trading companies [member] | CCEE [member] | Overdue up to 90 days [member] |  |
TradeAndOtherReceivablesLineItems [Line Items] |  |
Trade Accounts Receivable | 16 |
Concessionaires, permission holder and trading companies [member] | CCEE [member] | 2021 [member] |  |
TradeAndOtherReceivablesLineItems [Line Items] |  |
Trade Accounts Receivable | 119,665 |
Concessionaires, permission holder and trading companies [member] | Energy suplies [member] |  |
TradeAndOtherReceivablesLineItems [Line Items] |  |
Trade Accounts Receivable | 1,089,287 | 666,667
Concessionaires, permission holder and trading companies [member] | Energy suplies [member] | Balance falling due [member] |  |
TradeAndOtherReceivablesLineItems [Line Items] |  |
Trade Accounts Receivable | 960,945 |
Concessionaires, permission holder and trading companies [member] | Energy suplies [member] | Overdue up to 90 days [member] |  |
TradeAndOtherReceivablesLineItems [Line Items] |  |
Trade Accounts Receivable | 1,808 |
Concessionaires, permission holder and trading companies [member] | Energy suplies [member] | 2021 [member] |  |
TradeAndOtherReceivablesLineItems [Line Items] |  |
Trade Accounts Receivable | 126,534 |
Concessionaires, permission holder and trading companies [member] | Charges from using transmission grid [member] |  |
TradeAndOtherReceivablesLineItems [Line Items] |  |
Trade Accounts Receivable | 281,508 | 215,582
Concessionaires, permission holder and trading companies [member] | Charges from using transmission grid [member] | Balance falling due [member] |  |
TradeAndOtherReceivablesLineItems [Line Items] |  |
Trade Accounts Receivable | 271,008 |
Concessionaires, permission holder and trading companies [member] | Charges from using transmission grid [member] | Overdue up to 90 days [member] |  |
TradeAndOtherReceivablesLineItems [Line Items] |  |
Trade Accounts Receivable | 1,396 |
Concessionaires, permission holder and trading companies [member] | Charges from using transmission grid [member] | 2021 [member] |  |
TradeAndOtherReceivablesLineItems [Line Items] |  |
Trade Accounts Receivable | 9,104 |
Telecommunications [member] |  |
TradeAndOtherReceivablesLineItems [Line Items] |  |
Trade Accounts Receivable |  | 67,304
Telecommunications [member] | Balance falling due [member] |  |
TradeAndOtherReceivablesLineItems [Line Items] |  |
Trade Accounts Receivable |  |
Telecommunications [member] | Overdue up to 90 days [member] |  |
TradeAndOtherReceivablesLineItems [Line Items] |  |
Trade Accounts Receivable |  |
Telecommunications [member] | 2021 [member] |  |
TradeAndOtherReceivablesLineItems [Line Items] |  |
Trade Accounts Receivable |  |
Gas Distribution [member] |  |
TradeAndOtherReceivablesLineItems [Line Items] |  |
Trade Accounts Receivable | 70,928 | 111,026
Gas Distribution [member] | Balance falling due [member] |  |
TradeAndOtherReceivablesLineItems [Line Items] |  |
Trade Accounts Receivable | 56,862 |
Gas Distribution [member] | Overdue up to 90 days [member] |  |
TradeAndOtherReceivablesLineItems [Line Items] |  |
Trade Accounts Receivable | 1,342 |
Gas Distribution [member] | 2021 [member] |  |
TradeAndOtherReceivablesLineItems [Line Items] |  |
Trade Accounts Receivable | 12,724 |
Expected credit losses [member] |  |
TradeAndOtherReceivablesLineItems [Line Items] |  |
Trade Accounts Receivable | (365,551) | R$ (376,756)
Expected credit losses [member] | Balance falling due [member] |  |
TradeAndOtherReceivablesLineItems [Line Items] |  |
Trade Accounts Receivable | (7,610) |
Expected credit losses [member] | Overdue up to 90 days [member] |  |
TradeAndOtherReceivablesLineItems [Line Items] |  |
Trade Accounts Receivable | (11,964) |
Expected credit losses [member] | 2021 [member] |  |
TradeAndOtherReceivablesLineItems [Line Items] |  |
Trade Accounts Receivable | R$ (345,977) |

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