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Inventories, Net - Summary of Consolidated Balance of Inventories (Detail) - MXN ($) $ in Millions | Dec. 31, 2018 | Dec. 31, 2017
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Classes of current inventories [abstract] |  |
Finished goods | $ 6,777 | $ 5,933
Work-in-process | 3,818 | 3,814
Raw materials | 3,813 | 3,237
Materials and spare parts | 5,964 | 4,996
Inventory in transit | 876 | 872
Current inventories | $ 21,248 | $ 18,852

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- Definition A classification of current inventory representing the amount of goods that have completed the production process and are held for sale in the ordinary course of business. [Refer: Inventories] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 2 -IssueDate 2018-01-01 -Paragraph 37 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=2&date=2018-03-01&anchor=para_37&doctype=Standard -URIDate 2018-03-16 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 1 -IssueDate 2018-01-01 -Paragraph 78 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_78_c&doctype=Standard -URIDate 2018-03-16 + Details
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