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The quantitative sensitivity analysis for significant assumptions for the post-employment health benefit as of December 31, 2021, is shown below: (Details) - Healthcare Plan [Member]
R$ in Thousands
 12 Months Ended
Dec. 31, 2021
BRL (R$)
shares
Possible Increase In Actuarial Assumption [Member] | Actuarial assumption of discount rates [member]  
IfrsStatementLineItems [Line Items]  
Sensitivity level 0.50%
Effect on current service cost and on interest on actuarial obligations | R$ R$ 559
Effect on present value of obligations | shares (20,842)
Possible Increase In Actuarial Assumption [Member] | Actuarial Assumption Of Medical Inflation [Member]  
IfrsStatementLineItems [Line Items]  
Sensitivity level 1.00%
Effect on current service cost and on interest on actuarial obligations | R$ R$ 5,291
Effect on present value of obligations | shares 50,127
Possible Increase In Actuarial Assumption [Member] | Actuarial Assumption Of Mortality Table [Member]  
IfrsStatementLineItems [Line Items]  
Effect on current service cost and on interest on actuarial obligations | R$ R$ 3,880
Effect on present value of obligations | shares 36,763
Sensitivity level, year +1 year
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$ (608)
Effect on present value of obligations | shares 22,545
Actuarial Assumption Of Medical Inflation [Member] | Actuarial assumption of discount rates [member]  
IfrsStatementLineItems [Line Items]  
Sensitivity level (1.00%)
Effect on current service cost and on interest on actuarial obligations | R$ R$ (4,599)
Effect on present value of obligations | shares (43,572)
Actuarial Assumption Of Mortality Table [Member] | Actuarial assumption of mortality rates [member]  
IfrsStatementLineItems [Line Items]  
Effect on current service cost and on interest on actuarial obligations | R$ R$ (3,669)
Effect on present value of obligations | shares (34,763)
Sensitivity level, year - 1 year