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Schedule of assets and liabilities classified as held for sale (Details) - BRL (R$)
R$ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Assets held for sale – investment in an affiliate (Light) R$ 1,258
Assets held for sale – investment in an jointly controlled (Renova)
 Net income after taxes - discontinued operations R$ 1,258