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Schedule of estimated useful lives (Details)
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Buildings [member]    
IfrsStatementLineItems [Line Items]    
Average estimated useful lives 34 years 34 years
Machinery [member]    
IfrsStatementLineItems [Line Items]    
Average estimated useful lives 18 years 20 years
Fixtures and fittings [member]    
IfrsStatementLineItems [Line Items]    
Average estimated useful lives 12 years 12 years
Other property, plant and equipment [member]    
IfrsStatementLineItems [Line Items]    
Average estimated useful lives 10 years 10 years