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Property, plant and equipment (Schedule of Net Book Value of Property, Plant and Equipment) (Details) - MXN ($) $ in Thousands | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
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Disclosure of detailed information about property, plant and equipment [line items] |  |  |
Net Book Value | $ 16,970,832 | $ 15,737,081 | $ 14,491,000
Land [Member] |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |
Net Book Value | 1,217,000 | 1,094,000 | 1,105,000
Buildings [Member] |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |
Net Book Value | 3,625,000 | 3,743,000 | 3,854,000
Machinery and Equipment [Member] |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |
Net Book Value | 7,187,000 | 7,331,000 | 6,103,000
Transportation equipment [Member] |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |
Net Book Value | 78,000 | 78,000 | 77,000
Furniture, mixtures and computer Equipment [Member] |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |
Net Book Value | 64,000 | 57,000 | 59,000
Constructions and machinery in-progress [Member] |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |
Net Book Value | $ 4,800,000 | $ 3,434,000 | $ 3,293,000

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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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- Definition The amount of tangible assets that: (a) are held for use in the production or supply of goods or services, for rental to others, or for administrative purposes; and (b) are expected to be used during more than one period. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 16 -IssueDate 2018-01-01 -Paragraph 73 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=16&date=2018-03-01&anchor=para_73_e&doctype=Standard -URIDate 2018-03-16 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2018-01-01 -Paragraph 54 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_54_a&doctype=Standard -URIDate 2018-03-16 + Details
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- Details
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- Details
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- Details
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- Details
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