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Investments in Other Entities - Summary of Investments in Other Entities (Detail) $ in Millions, $ in Millions | Dec. 31, 2020 USD ($) | [1] | Dec. 31, 2020 MXN ($) | Dec. 31, 2019 MXN ($)
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Disclosure of investments in associates and other [line items] |  |  |  |
Investments in other entities | $ 383 | $ 7,623 | $ 9,751 | [2]
Investment in Associates and Joint Ventures | Investment in Associates and Joint Ventures |  |  |  |
Disclosure of investments in associates and other [line items] |  |  |  |
Investments in other entities |  | $ 7,623 | $ 9,751 |
[1] | Convenience translation to U.S. dollars ($) – See Note 2.2.3
[2] | The Company initially adopted IFRS 16 on January 1, 2019 using the modified retrospective approach under which the comparative information is not restated. – See Note 3.18

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- Definition The amount of investments in subsidiaries, joint ventures and associates in an entity's separate financial statements. [Refer: Associates [member]; Joint ventures [member]; Subsidiaries [member]; Investments in subsidiaries] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 27 -IssueDate 2019-01-01 -Paragraph 10 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=27&code=ifrs-tx-2019-en-r&anchor=para_10&doctype=Standard -URIDate 2019-03-27 + Details
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