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Intangible Assets and Goodwill, Net - Net carrying amount of goodwill, indefinite-lived trademarks and concessions (Details) - MXN ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Changes in the net carrying amount of goodwill, indefinite-lived trademarks and concessions      
Balance at beginning of the period $ 43,328,954    
Balance at end of the period 42,724,218 $ 43,328,954  
Impairment of long-lived assets (1,387,431) (1,446,568) $ (1,479,511)
Goodwill      
Changes in the net carrying amount of goodwill, indefinite-lived trademarks and concessions      
Balance at beginning of the period 14,113,626 14,113,626  
Balance at end of the period 14,113,626 14,113,626 14,113,626
Goodwill | Cable      
Changes in the net carrying amount of goodwill, indefinite-lived trademarks and concessions      
Balance at beginning of the period 13,794,684 13,794,684  
Balance at end of the period 13,794,684 13,794,684 13,794,684
Goodwill | Content      
Changes in the net carrying amount of goodwill, indefinite-lived trademarks and concessions      
Balance at beginning of the period 241,973 241,973  
Balance at end of the period 241,973 241,973 241,973
Goodwill | Other Businesses      
Changes in the net carrying amount of goodwill, indefinite-lived trademarks and concessions      
Balance at beginning of the period 76,969 76,969  
Balance at end of the period 76,969 76,969 76,969
Indefinite-lived trademarks      
Changes in the net carrying amount of goodwill, indefinite-lived trademarks and concessions      
Balance at beginning of the period 175,444 479,409  
Impairment adjustments (40,803) (67,574)  
Transfers (99,399) (236,391)  
Balance at end of the period 35,242 175,444 479,409
Indefinite-lived trademarks | Cable      
Changes in the net carrying amount of goodwill, indefinite-lived trademarks and concessions      
Balance at beginning of the period 132,212 368,603  
Transfers (99,399) (236,391)  
Balance at end of the period 32,813 132,212 368,603
Indefinite-lived trademarks | Other Businesses      
Changes in the net carrying amount of goodwill, indefinite-lived trademarks and concessions      
Balance at beginning of the period 43,232 110,806  
Impairment adjustments (40,803) (67,574)  
Balance at end of the period 2,429 43,232 110,806
Concessions      
Changes in the net carrying amount of goodwill, indefinite-lived trademarks and concessions      
Balance at beginning of the period 15,166,067 15,166,067  
Balance at end of the period 15,166,067 15,166,067 15,166,067
Concessions | Cable      
Changes in the net carrying amount of goodwill, indefinite-lived trademarks and concessions      
Balance at beginning of the period 15,070,025 15,070,025  
Balance at end of the period 15,070,025 15,070,025 15,070,025
Concessions | Sky      
Changes in the net carrying amount of goodwill, indefinite-lived trademarks and concessions      
Balance at beginning of the period 96,042 96,042  
Balance at end of the period 96,042 96,042 $ 96,042
Trademarks      
Changes in the net carrying amount of goodwill, indefinite-lived trademarks and concessions      
Impairment of long-lived assets (40,803) (67,574)  
Intangible Assets with Finite Useful Lives      
Changes in the net carrying amount of goodwill, indefinite-lived trademarks and concessions      
Balance at beginning of the period 13,873,817    
Balance at end of the period 13,409,283 13,873,817  
Intangible Assets with Finite Useful Lives | Concessions      
Changes in the net carrying amount of goodwill, indefinite-lived trademarks and concessions      
Balance at beginning of the period 221,402    
Balance at end of the period 110,701 221,402  
Intangible Assets with Finite Useful Lives | Trademarks      
Changes in the net carrying amount of goodwill, indefinite-lived trademarks and concessions      
Balance at beginning of the period 228,510    
Balance at end of the period $ 255,782 $ 228,510