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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 |

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