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Employee benefits (Details 12)
 12 Months Ended
Dec. 31, 2022
P P S P R [Member]  
IfrsStatementLineItems [Line Items]  
Number of Years 11 years 21 days
P P S P R P P S P R [Member]  
IfrsStatementLineItems [Line Items]  
Number of Years 6 years 7 months 2 days
P P S P N R [Member]  
IfrsStatementLineItems [Line Items]  
Number of Years 10 years 4 months 13 days
P P S P N R Pre 70 [Member]  
IfrsStatementLineItems [Line Items]  
Number of Years 7 years 1 month 20 days