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Accounts Receivable from Subscribers, Distributors, Recoverable Taxes Contractual Assets and Other, Net - Schedule of Changes in Allowance for Expected Credit Losses (Detail) - MXN ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | [1]
Subclassifications of assets, liabilities and equities [abstract] |  |  |  |  |
Balance at beginning of year |  | $ (42,079,056) | $ (41,835,826) | [1] | $ (44,551,735)
Increases recorded in expenses | [2] | (12,021,598) | (12,197,447) |  | (10,212,490)
Write-offs |  | 11,392,722 | 9,162,382 |  | 11,682,343
Incorporation (spin-off) | [3] | (3,002) | 0 |  | 0
Translation effect |  | 4,515,937 | 2,791,835 |  | 1,246,056
Balance at year end |  | $ (38,194,997) | $ (42,079,056) |  | $ (41,835,826)
[1] | Discontinued operations
[2] | Includes discontinued operation of Panama and Chile in joint venture. See note 2Ac.
[3] | This figure is related to the spin-off of Telekom Austria AG.

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