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Schedule of average periods of the obligations under the benefit plans (Details)
 12 Months Ended
Dec. 31, 2021
Pension And Retirement Supplement Plans Plan A [member]  
IfrsStatementLineItems [Line Items]  
Average periods of maturity of the obligations under the benefit plans 10 years 15 days
Pension And Retirement Supplement Plans Plan B [member]  
IfrsStatementLineItems [Line Items]  
Average periods of maturity of the obligations under the benefit plans 12 years 10 months 10 days
Health Plan [member]  
IfrsStatementLineItems [Line Items]  
Average periods of maturity of the obligations under the benefit plans 14 years 5 months 9 days
Dental Plan [member]  
IfrsStatementLineItems [Line Items]  
Average periods of maturity of the obligations under the benefit plans 15 years 5 months 20 days