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Balances and Transactions in Foreign Currencies - Summary of Transactions Denominated in Foreign Currencies, Expressed in Mexican pesos (Detail) $ in Millions, $ in Millions | 12 Months Ended
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Dec. 31, 2024 USD ($) | Dec. 31, 2024 MXN ($) | Dec. 31, 2023 USD ($) | Dec. 31, 2023 MXN ($) | Dec. 31, 2022 USD ($) | Dec. 31, 2022 MXN ($)
Disclosure of Balances and Transactions in Foreign Currencies [line items] |  |  |  |  |  |
Total revenues |  | $ 279,793 |  | $ 245,088 |  | $ 226,740
Interest Expense |  | $ 7,532 |  | $ 7,102 |  | $ 6,500
U.S. Dollar |  |  |  |  |  |
Disclosure of Balances and Transactions in Foreign Currencies [line items] |  |  |  |  |  |
Total revenues | $ 1,882 |  | $ 1,468 |  | $ 830 |
Purchases of Raw Materials | 24,065 |  | 18,075 |  | 17,285 |
Interest Expense | 1,383 |  | 1,257 |  | 1,148 |
Other | $ 4,941 |  | $ 4,065 |  | $ 2,973 |

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