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Staff Costs - Average monthly number of employees (Details) - employee | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Disclosure of products and services [line items] |  |  |
Average number of employees | 1,658 | 1,687 | 1,706
Production and distribution |  |  |
Disclosure of products and services [line items] |  |  |
Average number of employees | 1,397 | 1,381 | 1,432
Sales and administration |  |  |
Disclosure of products and services [line items] |  |  |
Average number of employees | 204 | 246 | 218
Research and development |  |  |
Disclosure of products and services [line items] |  |  |
Average number of employees | 57 | 60 | 56

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- Definition The average number of personnel employed by the entity during a period. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2017-01-01 -Paragraph 112 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_112_c&doctype=Standard -URIDate 2017-03-09 + Details
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Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | duration

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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table. + References No definition available. + Details
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Period Type: | duration

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- Details
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- Details
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Data Type: | na
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- Details
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