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Equity (Details 1)
Dec. 31, 2023
shares
IfrsStatementLineItems [Line Items]  
Number of shares 2,982,810,591
Percent 100.00%
Common Shares [Member] | State Of Parana [Member]  
IfrsStatementLineItems [Line Items]  
Number of shares 358,562,509
Percent 27.57%
Common Shares [Member] | BNDES [Member]  
IfrsStatementLineItems [Line Items]  
Number of shares 131,161,562
Percent 10.09%
Common Shares [Member] | Other Shareholders [Member]  
IfrsStatementLineItems [Line Items]  
Number of shares 810,623,229
Percent 62.34%
Class A Preferred Shares [member]  
IfrsStatementLineItems [Line Items]  
Number of shares 3,128,000
Percent 100.00%
Class A Preferred Shares [member] | State Of Parana [Member]  
IfrsStatementLineItems [Line Items]  
Number of shares
Percent
Class A Preferred Shares [member] | BNDES [Member]  
IfrsStatementLineItems [Line Items]  
Number of shares
Class A Preferred Shares [member] | Other Shareholders [Member]  
IfrsStatementLineItems [Line Items]  
Number of shares 3,128,000
Percent 100.00%
Class B Preferred Shares [member]  
IfrsStatementLineItems [Line Items]  
Number of shares 1,679,335,290
Percent 100.00%
Class B Preferred Shares [member] | State Of Parana [Member]  
IfrsStatementLineItems [Line Items]  
Number of shares 116,106,174
Percent 6.91%
Class B Preferred Shares [member] | BNDES [Member]  
IfrsStatementLineItems [Line Items]  
Number of shares 524,646,248
Percent 31.24%
Class B Preferred Shares [member] | Other Shareholders [Member]  
IfrsStatementLineItems [Line Items]  
Number of shares 1,038,582,868
Percent 61.85%
Special Class [Member]  
IfrsStatementLineItems [Line Items]  
Number of shares 1
Percent 100.00%
Special Class [Member] | State Of Parana [Member]  
IfrsStatementLineItems [Line Items]  
Number of shares 1
Percent 100.00%
Special Class [Member] | BNDES [Member]  
IfrsStatementLineItems [Line Items]  
Number of shares
Percent
Special Class [Member] | Other Shareholders [Member]  
IfrsStatementLineItems [Line Items]  
Number of shares
Percent
Common Shares One [Member] | State Of Parana [Member]  
IfrsStatementLineItems [Line Items]  
Number of shares 474,668,684
Percent 15.91%
Common Shares One [Member] | BNDES [Member]  
IfrsStatementLineItems [Line Items]  
Number of shares 655,807,810
Percent 21.99%
Common Shares One [Member] | Other Shareholders [Member]  
IfrsStatementLineItems [Line Items]  
Number of shares 1,852,334,097
Percent 62.10%
Common Share [Member]  
IfrsStatementLineItems [Line Items]  
Number of shares 1,300,347,300
Percent 100.00%