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Financial Instruments - Additional Information (Detail) $ in Millions, $ in Millions | 12 Months Ended |  |  |
--- | --- | --- | --- | ---
Dec. 31, 2024 MXN ($) | Dec. 31, 2023 MXN ($) | Dec. 31, 2022 MXN ($) | Dec. 31, 2024 USD ($) | Dec. 31, 2024 MXN ($) | Dec. 31, 2023 USD ($) | Dec. 31, 2023 MXN ($) | Dec. 31, 2022 USD ($)
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |  |  |  |
Long term debt |  |  |  |  | $ 72,254 |  | $ 65,126 |
Market value (loss) on financial instruments | $ 67 | $ 169 | $ (672) |  |  |  |  |
Long Term Yankee Bonds | Hedged portion of senior note |  |  |  |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |  |  |  |
Market value (loss) on financial instruments | $ 383 | $ (371) |  |  |  |  |  |
Increase decrease in borrowings |  |  |  |  |  |  | 1,277 |
U.S. Dollar | Long Term Yankee Bonds |  |  |  |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |  |  |  |
Long term debt |  |  |  |  | 43,504 |  | $ 36,352 |
U.S. Dollar | Long Term Yankee Bonds | Hedged portion of senior note |  |  |  |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |  |  |  |
Long term debt |  |  |  | $ 705 |  | $ 705 |  | $ 705
Mexican peso | Long Term Yankee Bonds | Hedged portion of senior note |  |  |  |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |  |  |  |
Increase decrease in borrowings |  |  |  |  | $ 1,659 |  |  |

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