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Inventories, Net - Summary of Analysis of Inventories (Detail) $ in Thousands, $ in Millions | Dec. 31, 2018 MXN ($) | Dec. 31, 2018 USD ($) | Dec. 31, 2017 MXN ($)
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Classes of current inventories [abstract] |  |  |
Mobile phones, accessories, computers, TVs, cards and other materials | $ 43,723,492 |  | $ 42,262,511
Less: Reserve for obsolete and slow-moving inventories | (3,418,130) |  | (3,452,946)
Total | $ 40,305,362 | $ 2,048 | $ 38,809,565

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