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Inventories - Summary of Inventories (Detail)
$ in Millions, $ in Millions
Dec. 31, 2018
MXN ($)
Dec. 31, 2018
USD ($)
[1]
Dec. 31, 2017
MXN ($)
Classes of current inventories [abstract]      
Finished products $ 27,145   $ 25,864
Raw materials 5,363   5,194
Spare parts 1,362   2,102
Work in process 225   198
Inventories in transit 1,591   1,437
Other     45
Total inventories $ 35,686 $ 1,817 $ 34,840
[1] Convenience translation to U.S. dollars ($) - See Note 2.2.3