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v3.21.1

Business Combinations, Acquisitions and Non-controlling Interest - Additional Information (Detail) $ in Thousands |  | 4 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | ---
Dec. 18, 2019 MXN ($) | Apr. 24, 2019 MXN ($) | Dec. 31, 2020 USD ($) | Dec. 31, 2020 MXN ($) | Dec. 31, 2019 MXN ($)
Disclosure of detailed information about business combination [line items] |  |  |  |  |
Percentage of voting equity interests acquired |  |  |  | 80.00% |
Other Entities [member] |  |  |  |  |
Disclosure of detailed information about business combination [line items] |  |  |  |  |
Net of cash paid |  |  |  | $ 152,896 |
Additional non-controlling interest acquired |  |  |  | 1,104,662 |
Nextel Telecomunicacoes Ltda [member] |  |  |  |  |
Disclosure of detailed information about business combination [line items] |  |  |  |  |
Amount paid for business acquisition net of cash acquired | $ 6,905,539 |  |  |  |
Goodwill amount recognized |  |  |  |  | $ 1,912,372
Acquisition of fixed and mobile line operator | 100.00% |  |  |  |
Consideration transferred, acquisition-date fair value | $ 17,992,362 |  |  |  |
Liabilities incurred | $ 9,325,712 |  |  |  |
ClaroTelefnica Moviles Guatemala SA [Member] |  |  |  |  |
Disclosure of detailed information about business combination [line items] |  |  |  |  |
Amount paid for business acquisition net of cash acquired |  | $ 5,734,254 |  |  |
Goodwill amount recognized |  |  |  |  | $ 1,195,136
Acquisition of fixed and mobile line operator |  | 100.00% |  |  |
Claro [Member] | Twenty Twenty Business Acquisition [Member] |  |  |  |  |
Disclosure of detailed information about business combination [line items] |  |  |  |  |
Consideration transferred, acquisition-date fair value |  |  |  | $ 16,500,000 |
Percentage of voting equity interests acquired |  |  |  | 32.00% |
Proportion of voting rights held in subsidiary |  |  | 22.00% |  |
Number Of Mobile Access Sites |  |  | $ 4,700 |  |

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- Definition The fair value, at acquisition date, of the consideration transferred in a business combination. [Refer: Business combinations [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 3 -IssueDate 2020-01-01 -Paragraph B64 -Subparagraph f -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=3&code=ifrs-tx-2020-en-r&anchor=para_B64_f&doctype=Appendix&subtype=B -URIDate 2020-01-01 + Details
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