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Schedule of summarized information of key subsidiaries Income Statement (Details) - BRL (R$)
R$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
IfrsStatementLineItems [Line Items]      
Net operating revenue   R$ 18,633,249  
Operating costs and expenses R$ 19,119,637 13,347,822 R$ 11,464,148
Income tax and social contribution (1,259,632) (1,285,365) (675,661)
NET INCOME 5,048,602 3,909,750 2,062,869
Total comprehensive income  5,201,347 3,730,595 1,939,685
Dona Francisca [Member]      
IfrsStatementLineItems [Line Items]      
Net operating revenue 66,797 70,314 70,717
Operating costs and expenses 26,605 26,171 25,957
Financial income (expense) (664) 208 475
Income tax and social contribution (2,298) (2,343) (2,454)
NET INCOME 37,230 42,008 42,781
Other comprehensive income
Total comprehensive income  37,230 42,008 42,781
Foz Do Chopim [Member]      
IfrsStatementLineItems [Line Items]      
Net operating revenue 60,943 55,740 56,929
Operating costs and expenses 10,775 21,260 16,278
Financial income (expense) (1,703) (5,527) 621
Income tax and social contribution (2,060) (2,035) (2,346)
NET INCOME 46,405 26,918 38,926
Other comprehensive income
Total comprehensive income  R$ 46,405 R$ 26,918 R$ 38,926