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Schedule of changes in equity attributable to non-controlling shareholders (Details) - BRL (R$) R$ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
IfrsStatementLineItems [Line Items] |  |  |
Balance as of January 1, 2019 | R$ 291,407 | R$ 345,798 | R$ 303,289
Net income (loss) | 96,029 | 5,548 | 72,923
Other comprehensive income | 144 | (207) | (601)
Additional dividends proposed |  | (51,799) | (3,335)
Dividends | (49,369) | (7,933) | (31,352)
Gain with interest variation in Subsidiary |  |  | 4,874
Balance as of December 31, 2021 | 338,211 | 291,407 | 345,798
Compagas [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Balance as of January 1, 2019 | 242,578 | 273,580 | 212,962
Net income (loss) | 48,800 | 28,898 | 84,758
Other comprehensive income | 144 | (168) | (626)
Additional dividends proposed |  | (51,799) |
Dividends | (42,653) | (7,933) | (23,514)
Gain with interest variation in Subsidiary |  |  |
Balance as of December 31, 2021 | 248,869 | 242,578 | 273,580
Elejor [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Balance as of January 1, 2019 | 4,046 | 12,858 | 16,193
Net income (loss) | (16,331) | (8,812) | 7,838
Other comprehensive income |  |  |
Additional dividends proposed |  |  | (3,335)
Dividends |  |  | (7,838)
Gain with interest variation in Subsidiary |  |  |
Balance as of December 31, 2021 | (12,285) | 4,046 | 12,858
U E G Araucaria [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Balance as of January 1, 2019 | 44,783 | 59,360 | 74,134
Net income (loss) | 63,560 | (14,538) | (19,673)
Other comprehensive income |  | (39) | 25
Additional dividends proposed |  |  |
Dividends | (6,716) |  |
Gain with interest variation in Subsidiary |  |  | 4,874
Balance as of December 31, 2021 | R$ 101,627 | R$ 44,783 | R$ 59,360

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