Significant accounting policies (Tables) |
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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:
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