XML 125 R102.htm IDEA: XBRL DOCUMENT v3.8.0.1
Property, plant and equipment - Useful lives (Details)
 12 Months Ended
Dec. 31, 2017
Top of range  
Disclosure of detailed information about property, plant and equipment [line items]  
Estimated useful lives 5 years
Farmland improvements | Bottom of range  
Disclosure of detailed information about property, plant and equipment [line items]  
Estimated useful lives 5 years
Farmland improvements | Top of range  
Disclosure of detailed information about property, plant and equipment [line items]  
Estimated useful lives 25 years
Buildings and facilities  
Disclosure of detailed information about property, plant and equipment [line items]  
Estimated useful lives 20 years
Furniture and fittings  
Disclosure of detailed information about property, plant and equipment [line items]  
Estimated useful lives 10 years
Computer equipment | Bottom of range  
Disclosure of detailed information about property, plant and equipment [line items]  
Estimated useful lives 3 years
Machinery and equipment | Bottom of range  
Disclosure of detailed information about property, plant and equipment [line items]  
Estimated useful lives 4 years
Machinery and equipment | Top of range  
Disclosure of detailed information about property, plant and equipment [line items]  
Estimated useful lives 10 years
Vehicles | Bottom of range  
Disclosure of detailed information about property, plant and equipment [line items]  
Estimated useful lives 4 years
Vehicles | Top of range  
Disclosure of detailed information about property, plant and equipment [line items]  
Estimated useful lives 5 years
Bearer plants  
Disclosure of detailed information about property, plant and equipment [line items]  
Estimated useful lives 6 years