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Investments in Financial Instruments (Details) - MXN ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | --- | ---
Financial Instruments |  |  |
Non-current financial assets | $ 44,265,899 | $ 49,203,430 |
Other |  |  |
Financial Instruments |  |  |
Non-current financial assets | 51,245 | 937 |
FVOCIL |  |  |
Financial Instruments |  |  |
Non-current financial assets | 44,214,654 | 49,202,493 | $ 49,635,260
FVOCIL | Warrants issued by UHI |  |  |
Financial Instruments |  |  |
Non-current financial assets | 33,775,451 | 34,921,530 | 36,395,183
FVOCIL | Open Ended Fund |  |  |
Financial Instruments |  |  |
Non-current financial assets | 4,688,202 | 7,662,726 | 7,297,577
FVOCIL | Other Equity Instruments |  |  |
Financial Instruments |  |  |
Non-current financial assets | 5,751,001 | 6,545,625 | $ 5,942,500
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 | 34,921,530 |
Financial assets measured at fair value through other comprehensive | Open Ended Fund |  |  |
Financial Instruments |  |  |
Non-current financial assets | 4,688,202 | 7,662,726 |
Financial assets measured at fair value through other comprehensive | Other Equity Instruments |  |  |
Financial Instruments |  |  |
Non-current financial assets | $ 5,751,001 | 6,545,625 |
Financial assets measured at fair value through other comprehensive | Other Financial Assets |  |  |
Financial Instruments |  |  |
Non-current financial assets |  | $ 72,612 |

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