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Investments in Financial Instruments -Available-for-sale financial assets (Details) - MXN ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018
Reconciliation for all assets and liabilities measured at fair value |  |
Balance at beginning of year | $ 49,203,430 |
Balance at the end of year | 44,265,899 | $ 49,203,430
Warrants issued by UHI |  |
Reconciliation for all assets and liabilities measured at fair value |  |
Foreign exchange (loss) gain derived from the hedge Open Ended Fund | (1,403,384) | 125,955
Open Ended Fund |  |
Reconciliation for all assets and liabilities measured at fair value |  |
Foreign exchange (loss) gain derived from the hedge Open Ended Fund | (289,298) | (317,126)
FVOCIL |  |
Reconciliation for all assets and liabilities measured at fair value |  |
Balance at beginning of year | 49,202,493 | 49,635,260
Investments |  | 72,723
Disposition of investments | (2,404,508) | (168,575)
Change in fair value in other comprehensive income (1) | (2,583,331) | (336,915)
Balance at the end of year | 44,214,654 | 49,202,493
FVOCIL | Warrants issued by UHI |  |
Reconciliation for all assets and liabilities measured at fair value |  |
Balance at beginning of year | 34,921,530 | 36,395,183
Change in fair value in other comprehensive income (1) | (1,146,079) | (1,473,653)
Balance at the end of year | 33,775,451 | 34,921,530
FVOCIL | Open Ended Fund |  |
Reconciliation for all assets and liabilities measured at fair value |  |
Balance at beginning of year | 7,662,726 | 7,297,577
Disposition of investments | (2,331,785) | (167,934)
Change in fair value in other comprehensive income (1) | (642,739) | 533,083
Balance at the end of year | 4,688,202 | 7,662,726
FVOCIL | Other Equity Instruments |  |
Reconciliation for all assets and liabilities measured at fair value |  |
Balance at beginning of year | 6,545,625 | 5,942,500
Disposition of investments |  | (641)
Change in fair value in other comprehensive income (1) | (794,624) | 603,766
Balance at the end of year | 5,751,001 | 6,545,625
FVOCIL | Other Financial Assets |  |
Reconciliation for all assets and liabilities measured at fair value |  |
Balance at beginning of year | 72,612 |
Investments |  | 72,723
Disposition of investments | (72,723) |
Change in fair value in other comprehensive income (1) | $ 111 | (111)
Balance at the end of year |  | $ 72,612

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- Definition The gains (losses) on hedged items in fair value hedges, which are attributable to the hedged risk. [Refer: Fair value hedges [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Note Expiry date 2021-01-01 -Name IFRS -Number 7 -IssueDate 2019-01-01 -Paragraph 24 -Subparagraph a -Clause ii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2017-en-b&anchor=para_24_a_ii&doctype=Standard&book=b -URIDate 2019-03-27 + Details
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