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Investments in Associates and Joint Ventures - Share of comprehensive (loss) income (Details) $ in Thousands, $ in Thousands | 12 Months Ended
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Dec. 31, 2020 USD ($) | Dec. 31, 2020 MXN ($) | Dec. 31, 2019 USD ($) | Dec. 31, 2019 MXN ($) | Dec. 31, 2018 USD ($) | Dec. 31, 2018 MXN ($)
Disclosure of Associate and Joint Ventures [Line Items] |  |  |  |  |  |
Share of (loss) income of associates and joint ventures, net |  | $ (5,739,668) |  | $ 581,023 |  | $ 532,933
Total |  | (61,033) |  | (236,159) |  | (47,313)
Revenue |  | 97,361,634 |  | 101,757,181 |  | 101,282,333
Profit from continuing operations |  | 302,824 |  | 6,106,813 |  | 7,615,270
Net income |  | 302,824 |  | 6,106,813 |  | 7,615,270
Total comprehensive income |  | (16,559,314) |  | 3,815,538 |  | 6,594,387
Associates | Joint ventures |  |  |  |  |  |
Disclosure of Associate and Joint Ventures [Line Items] |  |  |  |  |  |
Share of (loss) income of associates and joint ventures, net |  | (283,282) |  | 103,185 |  | 343,631
Foreign currency translation adjustments, net |  | 1,757 |  | (2,556) |  | 2,987
Other items of comprehensive loss, net |  | (5,261) |  | 2,117 |  | (3,399)
Total |  | (3,504) |  | (439) |  | (412)
Share of comprehensive income of associates and joint ventures |  | (286,786) |  | 102,746 |  | 343,219
Share of total comprehensive income |  | $ (286,786) |  | $ 102,746 |  | $ 343,219
UHI |  |  |  |  |  |
Disclosure of Associate and Joint Ventures [Line Items] |  |  |  |  |  |
Revenue | $ 2,541,900 |  | $ 2,687,900 |  | $ 2,713,800 |
Profit from continuing operations | 36,400 |  | 290,200 |  | 161,000 |
Post-tax loss from discontinued operations |  |  | (13,200) |  | (148,900) |
Net income | 36,400 |  | 277,000 |  | 12,100 |
Other comprehensive (loss) income | (23,700) |  | (99,000) |  | 15,410 |
Total comprehensive income | $ 12,700 |  | $ 178,000 |  | $ 27,510 |

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- Definition The entity's share of the profit (loss) of associates and joint ventures accounted for using the equity method. [Refer: Associates [member]; Investments accounted for using equity method; Joint ventures [member]; Profit (loss)] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 8 -IssueDate 2020-01-01 -Paragraph 23 -Subparagraph g -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=8&code=ifrs-tx-2020-en-r&anchor=para_23_g&doctype=Standard -URIDate 2020-01-01 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 8 -IssueDate 2020-01-01 -Paragraph 28 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=8&code=ifrs-tx-2020-en-r&anchor=para_28_e&doctype=Standard -URIDate 2020-01-01 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Note Effective on first application of IFRS 9 -Name IFRS -Number 4 -IssueDate 2020-01-01 -Paragraph 39M -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=4&code=ifrs-tx-2020-en-b&anchor=para_39M_b&doctype=Standard -URIDate 2020-01-01 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 82 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_82_c&doctype=Standard -URIDate 2020-01-01 + Details
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- Definition The entity's share of the total comprehensive income of associates and joint ventures accounted for using the equity method. [Refer: Associates [member]; Joint ventures [member]; Investments accounted for using equity method] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 12 -IssueDate 2020-01-01 -Paragraph B16 -Subparagraph d -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2020-en-r&anchor=para_B16_d&doctype=Appendix&subtype=B -URIDate 2020-01-01 + Details
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