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Accounting policies (Schedule of Annual Depreciation and Amortization Rates) (Details)
12 Months Ended
Dec. 31, 2022
Land [Member]  
Disclosure of detailed information about property, plant and equipment [line items]  
Useful Lives Or Depreciation Rates Property Plant And Equipment 50
Annual depreciation and amortization rates % 2
Construction [Member]  
Disclosure of detailed information about property, plant and equipment [line items]  
Useful Lives Or Depreciation Rates Property Plant And Equipment 25
Annual depreciation and amortization rates % 4
Motor vehicles [Member]  
Disclosure of detailed information about property, plant and equipment [line items]  
Useful Lives Or Depreciation Rates Property Plant And Equipment 5
Annual depreciation and amortization rates % 15-20
Office furniture and equipment [Member]  
Disclosure of detailed information about property, plant and equipment [line items]  
Useful Lives Or Depreciation Rates Property Plant And Equipment 6
Annual depreciation and amortization rates % 6-15
Computers [Member]  
Disclosure of detailed information about property, plant and equipment [line items]  
Useful Lives Or Depreciation Rates Property Plant And Equipment 3
Annual depreciation and amortization rates % 20-33
Machinery and equipment [Member]  
Disclosure of detailed information about property, plant and equipment [line items]  
Useful Lives Or Depreciation Rates Property Plant And Equipment 10
Annual depreciation and amortization rates % 10