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Inventories - Summary of Changes in Inventories (Detail) - MXN ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Classes of current inventories [abstract]
Changes in inventories of finished goods and work in progress	$ 204,688	$ 188,022	$ 172,554
Raw materials and consumables used	79,825	85,568	63,285
Total	$ 284,513	$ 273,590	$ 235,839

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- Definition

The decrease (increase) in inventories of finished goods and work in progress. [Refer: Inventories; Current finished goods; Current work in progress]

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The amount of assets: (a) held for sale in the ordinary course of business; (b) in the process of production for such sale; or (c) in the form of materials or supplies to be consumed in the production process or in the rendering of services. Inventories encompass goods purchased and held for resale including, for example, merchandise purchased by a retailer and held for resale, or land and other property held for resale. Inventories also encompass finished goods produced, or work in progress being produced, by the entity and include materials and supplies awaiting use in the production process. [Refer: Current finished goods; Current merchandise; Current work in progress; Land]

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The amount of raw materials and consumables used in the production process or in the rendering of services. [Refer: Current raw materials]

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