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Schedule of amounts arising from insurance contracts (Details) - BRL (R$) R$ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2021 | Dec. 31, 2020
Adjustments For Decrease Increase In Assets | Facilities In Buildings [member] |  |
IfrsStatementLineItems [Line Items] |  |
Coverage | Fire |
Coverage period | Jan. 8, 2022 to |
Amount insured | R$ 4,184 |
Annual premium | R$ 1 |
Cemig Geracao E Transmissao [Member] | Gas Purchased For Resale |  |
IfrsStatementLineItems [Line Items] |  |
Coverage | Fuselage Third party |
Coverage period | May 27, 2021 to May 27, 2022 |
Amount insured | R$ 1,500 |
Annual premium | R$ 55 |
Cemig Geracao E Transmissao [Member] | Air Transport Aircraft 1 [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Coverage period | May 27, 2021 to May 27, 2022 |
Amount insured | R$ 4,000 |
Annual premium | R$ 55 |
Cemig Geracao E Transmissao [Member] | Ware house Stores [member] |  |
IfrsStatementLineItems [Line Items] |  |
Coverage | Fire |
Coverage period | Nov. 2, 2021 to Nov. 2, 2022 |
Amount insured | R$ 21,119 |
Annual premium | R$ 35 |
Cemig Geracao E Transmissao [Member] | Buildings [member] |  |
IfrsStatementLineItems [Line Items] |  |
Coverage | Fire |
Coverage period | Jan. 8, 2022 to Jan. 8, 2023 |
Amount insured | R$ 220,822 |
Annual premium | R$ 68 |
Cemig Geracao E Transmissao [Member] | Telecoms Equipment [member] |  |
IfrsStatementLineItems [Line Items] |  |
Coverage | Fire |
Coverage period | Sep. 30, 2021 to Sep. 30, 2022 |
Amount insured | R$ 29,302 |
Annual premium | R$ 32 |
Cemig Geracao E Transmissao [Member] | Operational risk [member] |  |
IfrsStatementLineItems [Line Items] |  |
Coverage period | Dec. 7, 2021 to Dec. 7, 2022 |
Amount insured | R$ 757,263 |
Annual premium | R$ 1,269 |
Cemig Distribuicao [Member] | Ware house Stores [member] |  |
IfrsStatementLineItems [Line Items] |  |
Coverage | Fire |
Coverage period | Nov. 2, 2021 to Nov. 2, 2022 |
Amount insured | R$ 68,950 |
Annual premium | R$ 115 |
Cemig Distribuicao [Member] | Buildings [member] |  |
IfrsStatementLineItems [Line Items] |  |
Coverage | Fire |
Coverage period | Jan. 8, 2021 to Jan. 8, 2022 |
Amount insured | R$ 487,948 |
Annual premium | R$ 150 |
Cemig Distribuicao [Member] | Telecoms Equipment [member] |  |
IfrsStatementLineItems [Line Items] |  |
Coverage | Fire |
Coverage period | Sep. 30, 2021 to Sep. 30, 2022 |
Amount insured | R$ 96,115 |
Annual premium | R$ 104 |
Cemig Distribuicao [Member] | Operational risk [member] |  |
IfrsStatementLineItems [Line Items] |  |
Coverage | Total |
Coverage period | Dec. 7, 2021 to Dec. 7, 2022 |
Amount insured | R$ 588,617 |
Annual premium | R$ 986 |
Cemig Distribuicao [Member] | Energy Purchased For Resale |  |
IfrsStatementLineItems [Line Items] |  |
Coverage | Fuselage Third party |
Coverage period | May 27, 2021 to May 27, 2022 |
Amount insured | R$ 1,500 |
Annual premium | R$ 123 |
Cemig Distribuicao [Member] | Air Transport Aircraft Guimbal Equipment One [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Coverage | Fuselage Third party |
Coverage period | May 27, 2021 to May 27, 2022 |
Amount insured |  | R$ 4,000
Annual premium | R$ 123 |
Gasmig [Member] | Gas Distribution Network Third Party [member] |  |
IfrsStatementLineItems [Line Items] |  |
Coverage | Third party |
Coverage period | Dec. 15, 2021 to Dec. 15, 2022 |
Amount insured | R$ 100,000 |
Annual premium | R$ 1,100 |
Gasmig [Member] | Own Vehicle Fleet Operation [member] |  |
IfrsStatementLineItems [Line Items] |  |
Coverage | Damage to third parties only |
Coverage period | Jul. 7, 2021 to Jul. 7, 2022 |
Amount insured | R$ 500 |
Annual premium | R$ 1 |
Gasmig [Member] | Own Vehicle Fleet Directors [member] |  |
IfrsStatementLineItems [Line Items] |  |
Coverage | Full cover |
Coverage period | Oct. 25, 2021 to Oct. 25, 2022 |
Amount insured | R$ 187 |
Annual premium | R$ 2 |
Gasmig [Member] | Facilities Multirisk [member] |  |
IfrsStatementLineItems [Line Items] |  |
Coverage | Robbery, theft and fire |
Coverage period | Dec. 31, 2021 to Dec. 31, 2022 |
Amount insured | R$ 33,211 |
Annual premium | R$ 47 |

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