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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 |

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