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Related Parties - Summary of Transactions with Related Parties (Parenthetical) (Detail) $ in Thousands, $ in Millions | 12 Months Ended
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Dec. 31, 2023 MXN ($) | Dec. 31, 2023 USD ($) | Dec. 31, 2022 MXN ($) | Dec. 31, 2021 MXN ($)
Disclosure of transactions between related parties [line items] |  |  |  |
Materials purchased from subsidiaries | $ 7,720,624 |  | $ 11,018,630 | $ 11,447,164
Sale of towers of related party transactions | 8,546,615 |  | 3,323,594 | 6,943,400
Revenue | 816,012,844 | $ 48,303 | 844,501,397 | 830,687,452
Associated costs for towers sale | 1,751,405 |  | 360,073 | 0
Grupo Carso, SAB de CV [member] |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |
Network maintenance service cost | 69,248 |  | 117,321 | 121,728
Associates [member] |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |
Software service expense | 0 |  | 16,556 | 50,730
Seguros Inbursa SA and Fianzas Guardiana Inbursa, SA [member] |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |
Insurance premium | 3,460,518 |  | $ 3,281,176 | $ 3,814,995
Compaa Dominicana de Telfonos S A [Member] |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |
Sale of towers of related party transactions | 1,010,500 |  |  |
Amrica Mvil Per S A C [Member] |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |
Sale of towers of related party transactions | 4,840,325 |  |  |
Telmex [member] |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |
Sale of towers of related party transactions | 2,695,790 |  |  |
Dominican Republic, Paraguay, Costa Rica and Colombia [Member] |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |
Associated costs for towers sale | 885,427 |  |  |
America Movil Peru S A C [member] |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |
Associated costs for towers sale | 880,542 |  |  |
Telmexs [member] |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |
Revenue | 995,831 |  |  |
Associated costs for towers sale | $ 15,435 |  |  |

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