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Property, Plant and Equipment, net - Summary of fair value measurement for the revalued telecommunications towers (Detail) - 12 months ended Dec. 31, 2020
$ in Thousands, $ in Millions
MXN ($)
USD ($)
Disclosure of fair value measurement of assets [line items]    
Beginning balance $ 1,531,933,657  
Ending Balance 1,625,048,227 $ 81,463
Telecommunication towers [member]    
Disclosure of fair value measurement of assets [line items]    
Beginning balance 615,777,003  
Supplement for change in accounting policy 107,152,628  
Ending Balance $ 722,929,631