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Intangible Assets and Goodwill, Net - Future amortization expense of trademarks (Details) - MXN ($) $ in Thousands | 3 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | ---
Sep. 30, 2015 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Intangible Assets and Goodwill, Net |  |  |  |  |
Intangible assets and goodwill, net |  | $ 42,724,218 | $ 43,328,954 |  |
Concessions |  |  |  |  |
Intangible Assets and Goodwill, Net |  |  |  |  |
Intangible assets and goodwill, net |  | 15,166,067 | 15,166,067 | $ 15,166,067 |
Intangible Assets with Finite Useful Lives |  |  |  |  |
Intangible Assets and Goodwill, Net |  |  |  |  |
Intangible assets and goodwill, net |  | 13,409,283 | 13,873,817 |  |
Intangible Assets with Finite Useful Lives | Trademarks |  |  |  |  |
Intangible Assets and Goodwill, Net |  |  |  |  |
Intangible assets and goodwill, net |  | 255,782 | 228,510 |  |
Estimated useful life (in years) | 4 years |  |  |  |
Amortization |  |  | 321,520 |  |
Intangible Assets with Finite Useful Lives | Concessions |  |  |  |  |
Intangible Assets and Goodwill, Net |  |  |  |  |
Intangible assets and goodwill, net |  | $ 110,701 | 221,402 |  |
Estimated useful life (in years) |  | 5 years |  |  |
Amortization |  | $ 110,701 | $ 110,701 |  |
Intangible Assets with Finite Useful Lives | Concessions | 2021 |  |  |  |  |
Intangible Assets and Goodwill, Net |  |  |  |  |
Amortization |  | $ 110,701 |  |  |
Intangible Assets with Finite Useful Lives | Concessions | 2023 |  |  |  |  |
Intangible Assets and Goodwill, Net |  |  |  |  |
Intangible assets and goodwill, net |  |  |  |  | $ 553,505

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