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Employee Benefits - Summary of Long-Term Direct Employee Benefits (Detail) - MXN ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Disclosure of long term direct employee benefits [abstract]    
Beginning balance $ 8,750,603 $ 8,175,767
Effect of translation (328,619) 1,256,880
Increase of the year 1,824,693 1,729,392
Applications, Payments (2,320,831) (2,411,436)
Ending balance $ 7,925,846 $ 8,750,603