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Schedule of exposure to the price risk (Details) - Number
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
IfrsStatementLineItems [Line Items]    
Variation of the result for the year 49 34
Shares [Member]    
IfrsStatementLineItems [Line Items]    
Variation of the result for the year 15 4
Government Securities [Member]    
IfrsStatementLineItems [Line Items]    
Variation of the result for the year 28 21
Corporate Bonds [Member]    
IfrsStatementLineItems [Line Items]    
Variation of the result for the year 2 (0)
Investment funds [member]    
IfrsStatementLineItems [Line Items]    
Variation of the result for the year 4 9