Significant accounting policies (Tables)

12 Months Ended

Dec. 31, 2017

Significant accounting policies [Abstract]

Discount rates and growth rates used to calculated recoverable amount for CGUs by segment

Accordingly, the following table provides a summary of the discount rates used (WACC) and growth rates to calculate the recoverable amount for CGUs with the operating segment to which it pertains:

Operating segment	Discount rate			Growth rate
EMEA		4% - 6	%		0	%
North America		4% - 6	%		0	%
South America		5% - 7	%		0	%