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This table shows energy supply by type of customer: (Details) R$ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2021 BRL (R$) MW | Dec. 31, 2020 BRL (R$) MW | Dec. 31, 2019 BRL (R$) MW
Residential [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Supply of electricity in GWh | GW | MW | 11,186 | 10,981 | 10,538
Revenue from sale of electricity | R$ | R$ 11,124 | R$ 9,875 | R$ 9,668
Industrial [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Supply of electricity in GWh | GW | MW | 16,361 | 12,731 | 14,873
Revenue from sale of electricity | R$ | R$ 5,275 | R$ 4,171 | R$ 4,760
Commercial Services And Others [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Supply of electricity in GWh | GW | MW | 8,334 | 8,571 | 9,335
Revenue from sale of electricity | R$ | R$ 5,520 | R$ 4,979 | R$ 5,439
Rural [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Supply of electricity in GWh | GW | MW | 3,975 | 3,766 | 3,795
Revenue from sale of electricity | R$ | R$ 2,566 | R$ 2,190 | R$ 2,058
Public Authorities [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Supply of electricity in GWh | GW | MW | 729 | 714 | 905
Revenue from sale of electricity | R$ | R$ 583 | R$ 522 | R$ 654
Public Lighting [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Supply of electricity in GWh | GW | MW | 1,226 | 1,243 | 1,357
Revenue from sale of electricity | R$ | R$ 718 | R$ 550 | R$ 614
Public Services [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Supply of electricity in GWh | GW | MW | 1,418 | 1,362 | 1,373
Revenue from sale of electricity | R$ | R$ 879 | R$ 722 | R$ 725
Subtotal [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Supply of electricity in GWh | GW | MW | 43,229 | 39,368 | 42,176
Revenue from sale of electricity | R$ | R$ 26,665 | R$ 23,009 | R$ 23,918
Own Consumption [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Supply of electricity in GWh | GW | MW | 33 | 34 | 38
Unbilled Revenue [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Revenue from sale of electricity | R$ | R$ (14) | R$ 9 | R$ 134
Other [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Supply of electricity in GWh | GW | MW | 43,262 | 39,402 | 42,214
Revenue from sale of electricity | R$ | R$ 26,651 | R$ 23,018 | R$ 24,052
Wholesale Supply To Other Concession Holders [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Supply of electricity in GWh | GW | MW | 10,825 | 13,907 | 11,920
Revenue from sale of electricity | R$ | R$ 3,023 | R$ 3,363 | R$ 2,943
Wholesale Supply Unbilled Net [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Supply of electricity in GWh | GW | MW |  |  |
Revenue from sale of electricity | R$ | R$ (55) | R$ 51 | R$ (67)
Total [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Supply of electricity in GWh | GW | MW | 54,087 | 53,309 | 54,134
Revenue from sale of electricity | R$ | R$ 29,619 | R$ 26,432 | R$ 26,928

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