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Schedule of post-employment benefits recognized in the statement of income (Details) - BRL (R$)
R$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
IfrsStatementLineItems [Line Items]      
Post-employment benefits R$ 248,773 R$ 228,634 R$ 238,326
Management One [Member]      
IfrsStatementLineItems [Line Items]      
Post-employment benefits 1,422 1,116 1,541
Defined benefit plans other than multi-employer plans, state plans and plans that share risks between entities under common control [member] | Management One [Member]      
IfrsStatementLineItems [Line Items]      
Post-employment benefits 1,300 977 1,450
Healthcare Plan [Member] | Management One [Member]      
IfrsStatementLineItems [Line Items]      
Post-employment benefits 122 139 91
Employees [Member]      
IfrsStatementLineItems [Line Items]      
Post-employment benefits 247,351 227,518 236,785
Employees [Member] | Defined benefit plans other than multi-employer plans, state plans and plans that share risks between entities under common control [member]      
IfrsStatementLineItems [Line Items]      
Post-employment benefits 59,052 57,977 60,754
Employees [Member] | Healthcare Plan Post Employment [Member]      
IfrsStatementLineItems [Line Items]      
Post-employment benefits 116,504 94,349 99,577
Employees [Member] | Healthcare Plan Active Employees [Member]      
IfrsStatementLineItems [Line Items]      
Post-employment benefits R$ 71,795 R$ 75,192 R$ 76,454