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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, 2022
Dec. 31, 2021
Dec. 31, 2020
Disclosure of equity investments at fair value through other comprehensive income and other short-term investments [line items]      
Dividends received $ 6,155,993 $ 2,628,600 $ 2,122,826
Fair value of long term debt instruments designated as measured at fair value through other comprehensive income 6,981,149 6,894,757  
Revenue recognized for financial assets measured at fair value through other comprehensive income 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   15,026  
Changes in fair value of investment (4,707,276) 4,560,869  
Dividends received 2,459,637 2,628,600 $ 2,119,668
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 3,696,356    
Equity investment 44,056,945 61,600,578  
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) $ 44,371,166 $ 56,087,598