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Accounts Receivable from Subscribers, Distributors, Recoverable Taxes Contractual Assets and Other, Net - Summary of Aging of Accounts Receivable (Detail) - MXN ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Disclosure of accounts receivable [line items]    
Trade and other receivables $ 209,775,485 $ 215,770,817
Receivable from subscribers and distributors [member] | Cost [member]    
Disclosure of accounts receivable [line items]    
Trade and other receivables 157,433,609 168,758,386
Receivable from subscribers and distributors [member] | 1 - 30 days [member] | Cost [member]    
Disclosure of accounts receivable [line items]    
Trade and other receivables 35,694,272 37,439,995
Receivable from subscribers and distributors [member] | 31 - 60 days [member] | Cost [member]    
Disclosure of accounts receivable [line items]    
Trade and other receivables 4,533,604 5,325,264
Receivable from subscribers and distributors [member] | 61 - 90 days [member] | Cost [member]    
Disclosure of accounts receivable [line items]    
Trade and other receivables 2,645,034 3,313,835
Receivable from subscribers and distributors [member] | Greater than 90 days [member] | Cost [member]    
Disclosure of accounts receivable [line items]    
Trade and other receivables 45,477,862 46,706,481
Unbilled services provided [member] | Receivable from subscribers and distributors [member] | Cost [member]    
Disclosure of accounts receivable [line items]    
Trade and other receivables $ 69,082,837 $ 75,972,811