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Investments in Associates and Joint Ventures - Reconcilies Summary of Financial Information of UHI Carrying Amount (Details) $ in Thousands, $ in Thousands |  |  | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | ---
Dec. 28, 2020 | Feb. 25, 2020 | Dec. 31, 2020 MXN ($) | Dec. 31, 2019 MXN ($) | Dec. 31, 2020 USD ($) | Dec. 31, 2020 MXN ($) | Dec. 31, 2019 USD ($) | Dec. 31, 2019 MXN ($) | Dec. 31, 2018 MXN ($)
Disclosure of associates [line items] |  |  |  |  |  |  |  |  |
Investments in associates and joint ventures |  |  |  |  |  | $ 22,813,531 |  | $ 9,762,432 | $ 10,546,728
UHI |  |  |  |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |  |  |  |
Ownership interest in associate | 10.00% |  | 35.90% | 10.00% |  |  |  |  |
Percentage warrants if exercised on a fully diluted as converted basis |  | 36.00% |  |  |  |  |  |  |
Group's share of net assets |  |  |  |  | $ 135,307 | 2,699,282 | $ 44,568 | 841,619 |
Goodwill |  |  |  |  |  | 18,687,080 |  | 7,426,968 |
Adjustments for differences in accounting policies |  |  | $ 37,818 | $ (78,925) |  |  |  |  |
Investments in associates and joint ventures |  |  |  |  |  | $ 21,424,180 |  | $ 8,189,662 |

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