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Investments in Financial Instruments (Details) - MXN ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | --- | ---
Financial Instruments |  |  |
Non-current financial assets | $ 7,002,712 | $ 44,265,899 |
Other |  |  |
Financial Instruments |  |  |
Non-current financial assets | 469,405 | 51,245 |
FVOCIL |  |  |
Financial Instruments |  |  |
Non-current financial assets | 6,533,307 | 44,214,654 | $ 49,202,493
FVOCIL | Warrants issued by UHI |  |  |
Financial Instruments |  |  |
Non-current financial assets |  | 33,775,451 | 34,921,530
FVOCIL | Open Ended Fund |  |  |
Financial Instruments |  |  |
Non-current financial assets | 1,135,803 | 4,688,202 | 7,662,726
FVOCIL | Other Equity Instruments |  |  |
Financial Instruments |  |  |
Non-current financial assets | 5,397,504 | 5,751,001 | 6,545,625
FVOCIL | Other Financial Assets |  |  |
Financial Instruments |  |  |
Non-current financial assets |  |  | $ 72,612
Equity instruments measured at fair value through other comprehensive income | Warrants issued by UHI |  |  |
Financial Instruments |  |  |
Non-current financial assets |  | 33,775,451 |
Equity instruments measured at fair value through other comprehensive income | Open Ended Fund |  |  |
Financial Instruments |  |  |
Non-current financial assets | 1,135,803 | 4,688,202 |
Equity instruments measured at fair value through other comprehensive income | Other Equity Instruments |  |  |
Financial Instruments |  |  |
Non-current financial assets | $ 5,397,504 | $ 5,751,001 |

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