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Equity and debt investments at fair value through OCI and other short/long-term investments - Additional Information (Detail) - MXN ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Disclosure of equity investments at fair value through other comprehensive income and other short-term investments [line items]      
Dividends received [1] $ 4,551,827 $ 6,155,993 $ 2,628,600
Fair value of long term debt instruments designated as measured at fair value through other comprehensive income 14,914,412 6,981,149  
Revenue recognized for financial assets measured at fair value through other comprehensive income 2,206,671 4,271,250  
Investments accounted for using equity method Koninklijke KPN [member]      
Disclosure of equity investments at fair value through other comprehensive income and other short-term investments [line items]      
Other short-term investments 3,523,883    
Changes in fair value of investment (967,609) (4,707,276)  
Dividends received 1,867,184 2,459,637 $ 2,628,600
Investments accounted for using equity method in Verizon [Member]      
Disclosure of equity investments at fair value through other comprehensive income and other short-term investments [line items]      
Dividends received 2,684,643 3,696,356  
Equity investment 36,682,372 44,056,945  
Equity and other short term investments [member] | Investments accounted for using equity method Koninklijke KPN [member]      
Disclosure of equity investments at fair value through other comprehensive income and other short-term investments [line items]      
Equity investments at fair value through other comprehensive income (OCI) $ 33,549,372 $ 44,371,166  
[1] Dividend received during 2021, 2022 and 2023 by Ps. 2,628,600, Ps, 5,426,370 and Ps. 4,590,313, respectively.