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Equity (Details 1) - BRL (R$)
R$ / shares in Units, R$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
IfrsStatementLineItems [Line Items]      
Net income for the year R$ 1,112,007 R$ 4,952,573 R$ 3,904,202
Legal Reserve (5%) (55,600) (247,629) (195,210)
Realization of equity evaluation adjustment 36,513 46,575 59,630
 Calculation basis for minimum mandatory dividends 1,092,920 4,751,519 3,768,622
Interest on own capital - gross value  970,000 522,809 807,500
Interim dividends 1,197,003
Dividends - PNA shares 258
Complement to reach the mandatory minimum 211,057
Additional proposed dividends [1] 1,368,675 1,507,449
 Total proposed distribution 970,258 3,088,487 2,526,006
Gross amount of dividends per class of shares: ordinary shares R$ 357,961 R$ 1,120,747 1,278,126
Gross value of dividends per share: ordinary shares [2] R$ 1.80322 R$ 5.74147  
Class A Preferred Shares [Member]      
IfrsStatementLineItems [Line Items]      
Gross amount of dividends per class of shares, preferred R$ 1,407 R$ 3,658 R$ 4,155
Gross value of dividends per share, preferred R$ 0.44976 R$ 1.16956 R$ 1.27172
Class B Preferred Shares [Member]      
IfrsStatementLineItems [Line Items]      
Gross amount of dividends per class of shares, preferred R$ 610,890 R$ 1,964,082 R$ 1,243,725
Gross value of dividends per share, preferred R$ 0.36732 R$ 1.16956 R$ 0.96941
Ordinary Shares 1 [Member]      
IfrsStatementLineItems [Line Items]      
Gross value of dividends per share: ordinary shares R$ 0.33393 R$ 1.06323 R$ 0.88128
[1] In April 2022 and 2021 the General Assembly resolved to pay the proposed additional dividend, which occurred in June 2022 and August 2021.
[2] The Units are made up of 1 Ordinary share and 4 Class "B" preferred shares.