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Schedule of assets and liabilities over the cost paid in the step acquisitions (Details) - Sale Of Retained Investiment In Light [Member] - Light [Member] R$ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2021 BRL (R$)
IfrsStatementLineItems [Line Items] |  |
Cemig’s shares | R$ 68,621,263 |
Sale price of the shares – January 21, 2021 | 20 |
Total value | 1,372 |
Estimated cost to sell (0.42%) | (5) | [1]
Fair value, less cost to sell on 01/22/2021 | 1,367 |
Non-current asset held for sale carrying amount in 12/31/2020 | (1,258) |
Gains | 109 |
IRPJ and CSLL | (37) |
Gain after taxes | R$ 72 |
[1] | The estimated cost to sell includes financing, accounting and legal advices services.

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- Definition The amount of cemigs shares. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The amount of IRPJ and CSLL. + References No definition available. + Details
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Balance Type: | debit
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- Definition The amount of estimated cost to sell. + References No definition available. + Details
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Balance Type: | debit
Period Type: | duration

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- Definition The amount of fair value, less cost to sell. + References No definition available. + Details
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- Definition The amount of non-current asset held for sale carrying amount. + References No definition available. + Details
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- Definition The amount of sale price of the shares. + References No definition available. + Details
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- Definition The gains (losses) on available-for-sale financial assets. [Refer: Financial assets available-for-sale] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Note Expiry date 2023-01-01 -Name IFRS -Number 7 -IssueDate 2021-01-01 -Paragraph 20 -Subparagraph a -Clause ii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2017-en-b&anchor=para_20_a_ii&doctype=Standard&book=b -URIDate 2021-03-24 + Details
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- Definition The gains (losses) recognised in other comprehensive income on remeasuring available-for-sale financial assets, net of tax, before reclassification adjustments. [Refer: Financial assets available-for-sale] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Note Expiry date 2023-01-01 -Name IAS -Number 1 -IssueDate 2021-01-01 -Paragraph 91 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2017-en-b&anchor=para_91_a&doctype=Standard&forcepdf=true -URIDate 2021-03-24 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Note Expiry date 2023-01-01 -Name IFRS -Number 7 -IssueDate 2021-01-01 -Paragraph 20 -Subparagraph a -Clause ii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2017-en-b&anchor=para_20_a_ii&doctype=Standard&book=b -URIDate 2021-03-24 + Details
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- Details
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