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The quantitative sensitivity analysis in relation to significant assumptions, for pension plans on December 31, 2021, is shown below: (Details)
R$ in Thousands
 12 Months Ended
Dec. 31, 2021
BRL (R$)
shares
Plan Covering Thirty Five Percent Of The Average Salary [Member] | Possible Increase In Actuarial Assumption [Member] | Actuarial assumption of discount rates [member]  
IfrsStatementLineItems [Line Items]  
Sensitivity level 0.50%
Effect on current service cost and on interest on actuarial obligations | R$ R$ (1,005)
Effect on present value of obligations | shares (16,114)
Plan Covering Thirty Five Percent Of The Average Salary [Member] | Possible Increase In Actuarial Assumption [Member] | Actuarial assumption of expected rates of salary increases [member]  
IfrsStatementLineItems [Line Items]  
Sensitivity level 0.50%
Plan Covering Thirty Five Percent Of The Average Salary [Member] | Possible Increase In Actuarial Assumption [Member] | Actuarial assumption of mortality rates [member]  
IfrsStatementLineItems [Line Items]  
Sensitivity level 0.50%
Effect on current service cost and on interest on actuarial obligations | R$ R$ 120
Effect on present value of obligations | shares 1,928
Plan Covering Thirty Five Percent Of The Average Salary [Member] | Possible Increase In Actuarial Assumption [Member] | Actuarial assumption of expected rates of pension increases [member]  
IfrsStatementLineItems [Line Items]  
Effect on current service cost and on interest on actuarial obligations | R$ R$ 850
Effect on present value of obligations | shares 13,626
Sensitivity level, year +1 year
Plan Covering Thirty Five Percent Of The Average Salary [Member] | Possible Decrease In Actuarial Assumption [Member] | Actuarial assumption of discount rates [member]  
IfrsStatementLineItems [Line Items]  
Sensitivity level (0.50%)
Effect on current service cost and on interest on actuarial obligations | R$ R$ 1,084
Effect on present value of obligations | shares 17,381
Plan Covering Thirty Five Percent Of The Average Salary [Member] | Possible Decrease In Actuarial Assumption [Member] | Actuarial assumption of expected rates of salary increases [member]  
IfrsStatementLineItems [Line Items]  
Sensitivity level (0.50%)
Plan Covering Thirty Five Percent Of The Average Salary [Member] | Possible Decrease In Actuarial Assumption [Member] | Actuarial assumption of mortality rates [member]  
IfrsStatementLineItems [Line Items]  
Sensitivity level (0.50%)
Effect on current service cost and on interest on actuarial obligations | R$ R$ (120)
Effect on present value of obligations | shares (1,928)
Plan Covering Thirty Five Percent Of The Average Salary [Member] | Possible Decrease In Actuarial Assumption [Member] | Actuarial assumption of expected rates of pension increases [member]  
IfrsStatementLineItems [Line Items]  
Effect on current service cost and on interest on actuarial obligations | R$ R$ (839)
Effect on present value of obligations | shares (13,455)
Sensitivity level, year - 1 year
Average Salary Supplementation Plan [Member] | Possible Increase In Actuarial Assumption [Member] | Actuarial assumption of discount rates [member]  
IfrsStatementLineItems [Line Items]  
Sensitivity level 0.50%
Effect on current service cost and on interest on actuarial obligations | R$ R$ (5,507)
Effect on present value of obligations | shares (85,515)
Average Salary Supplementation Plan [Member] | Possible Increase In Actuarial Assumption [Member] | Actuarial assumption of expected rates of salary increases [member]  
IfrsStatementLineItems [Line Items]  
Sensitivity level 0.50%
Average Salary Supplementation Plan [Member] | Possible Increase In Actuarial Assumption [Member] | Actuarial assumption of mortality rates [member]  
IfrsStatementLineItems [Line Items]  
Sensitivity level 0.50%
Effect on current service cost and on interest on actuarial obligations | R$ R$ 623
Effect on present value of obligations | shares 9,669
Average Salary Supplementation Plan [Member] | Possible Increase In Actuarial Assumption [Member] | Actuarial assumption of expected rates of pension increases [member]  
IfrsStatementLineItems [Line Items]  
Effect on current service cost and on interest on actuarial obligations | R$ R$ 4,382
Effect on present value of obligations | shares 68,039
Sensitivity level, year +1 year
Average Salary Supplementation Plan [Member] | Possible Decrease In Actuarial Assumption [Member] | Actuarial assumption of discount rates [member]  
IfrsStatementLineItems [Line Items]  
Sensitivity level (0.50%)
Effect on current service cost and on interest on actuarial obligations | R$ R$ 5,954
Effect on present value of obligations | shares 92,456
Average Salary Supplementation Plan [Member] | Possible Decrease In Actuarial Assumption [Member] | Actuarial assumption of expected rates of salary increases [member]  
IfrsStatementLineItems [Line Items]  
Sensitivity level (0.50%)
Average Salary Supplementation Plan [Member] | Possible Decrease In Actuarial Assumption [Member] | Actuarial assumption of mortality rates [member]  
IfrsStatementLineItems [Line Items]  
Sensitivity level (0.50%)
Effect on current service cost and on interest on actuarial obligations | R$ R$ (623)
Effect on present value of obligations | shares (9,669)
Average Salary Supplementation Plan [Member] | Possible Decrease In Actuarial Assumption [Member] | Actuarial assumption of expected rates of pension increases [member]  
IfrsStatementLineItems [Line Items]  
Effect on current service cost and on interest on actuarial obligations | R$ R$ (4,362)
Effect on present value of obligations | shares (67,726)
Sensitivity level, year - 1 year
Mixed Supplementary Benefit Plan [Member] | Possible Increase In Actuarial Assumption [Member] | Actuarial assumption of discount rates [member]  
IfrsStatementLineItems [Line Items]  
Sensitivity level 0.50%
Effect on current service cost and on interest on actuarial obligations | R$ R$ (4,758)
Effect on present value of obligations | shares (68,287)
Mixed Supplementary Benefit Plan [Member] | Possible Increase In Actuarial Assumption [Member] | Actuarial assumption of expected rates of salary increases [member]  
IfrsStatementLineItems [Line Items]  
Sensitivity level 0.50%
Effect on current service cost and on interest on actuarial obligations | R$ R$ 191
Effect on present value of obligations | shares 1,079
Mixed Supplementary Benefit Plan [Member] | Possible Increase In Actuarial Assumption [Member] | Actuarial assumption of mortality rates [member]  
IfrsStatementLineItems [Line Items]  
Sensitivity level 0.50%
Effect on current service cost and on interest on actuarial obligations | R$ R$ 430
Effect on present value of obligations | shares 5,975
Mixed Supplementary Benefit Plan [Member] | Possible Increase In Actuarial Assumption [Member] | Actuarial assumption of expected rates of pension increases [member]  
IfrsStatementLineItems [Line Items]  
Effect on current service cost and on interest on actuarial obligations | R$ R$ 1,562
Effect on present value of obligations | shares 22,603
Sensitivity level, year +1 year
Mixed Supplementary Benefit Plan [Member] | Possible Decrease In Actuarial Assumption [Member] | Actuarial assumption of discount rates [member]  
IfrsStatementLineItems [Line Items]  
Sensitivity level (0.50%)
Effect on current service cost and on interest on actuarial obligations | R$ R$ 5,309
Effect on present value of obligations | shares 76,188
Mixed Supplementary Benefit Plan [Member] | Possible Decrease In Actuarial Assumption [Member] | Actuarial assumption of expected rates of salary increases [member]  
IfrsStatementLineItems [Line Items]  
Sensitivity level (0.50%)
Effect on current service cost and on interest on actuarial obligations | R$ R$ (181)
Effect on present value of obligations | shares (1,030)
Mixed Supplementary Benefit Plan [Member] | Possible Decrease In Actuarial Assumption [Member] | Actuarial assumption of mortality rates [member]  
IfrsStatementLineItems [Line Items]  
Sensitivity level (0.50%)
Effect on current service cost and on interest on actuarial obligations | R$ R$ (430)
Effect on present value of obligations | shares (5,975)
Mixed Supplementary Benefit Plan [Member] | Possible Decrease In Actuarial Assumption [Member] | Actuarial assumption of expected rates of pension increases [member]  
IfrsStatementLineItems [Line Items]  
Effect on current service cost and on interest on actuarial obligations | R$ R$ (1,541)
Effect on present value of obligations | shares (22,306)
Sensitivity level, year - 1 year