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Inventories, Net - Summary of Analysis of Inventories (Detail) $ in Thousands, $ in Millions | Dec. 31, 2019 MXN ($) | Dec. 31, 2019 USD ($) | Dec. 31, 2018 MXN ($)
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Classes of current inventories [abstract] |  |  |
Mobile phones, accessories, computers, TVs, cards and other materials | $ 43,954,616 |  | $ 43,723,492
Less: Reserve for obsolete and slow-moving inventories | (2,852,604) |  | (3,418,130)
Total | $ 41,102,012 | $ 2,181 | $ 40,305,362

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