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Financial Instruments - Summarizes Outstanding Cross Currency Swap Agreements (Detail) - MXN ($) $ in Millions | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Disclosure of detailed information about financial instruments [line items] |  |
Asset | $ 4,702 | $ 96
Cross-currency swaps | Less than one year | Cash flow hedges |  |
Disclosure of detailed information about financial instruments [line items] |  |
Notional Amount | 6,251 | 5,210
Derivative financial instruments liability | 0 | (984)
Asset | 461 | $ 96
Cross-currency swaps | One to three years | Cash flow hedges |  |
Disclosure of detailed information about financial instruments [line items] |  |
Notional Amount | 9,121 |
Derivative financial instruments liability | (137) |
Asset | 433 |
Cross-currency swaps | Three to four years | Cash flow hedges |  |
Disclosure of detailed information about financial instruments [line items] |  |
Notional Amount | 16,357 |
Derivative financial instruments liability | (68) |
Asset | 3,114 |
Cross-currency swaps | Four to six years | Cash flow hedges |  |
Disclosure of detailed information about financial instruments [line items] |  |
Notional Amount | 608 |
Derivative financial instruments liability | 0 |
Asset | 53 |
Cross-currency swaps | After six years | Cash flow hedges |  |
Disclosure of detailed information about financial instruments [line items] |  |
Notional Amount | 0 |
Derivative financial instruments liability | 0 |
Asset | $ 641 |

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