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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
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.