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Financial Instruments - Interest Rate Swaps (Details) - MXN ($) $ in Millions | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Disclosure of Financial Assets and Financial Liabilities [Line Items] |  |
Face amount | $ 67,216 | $ 52,369
Year one |  |
Disclosure of Financial Assets and Financial Liabilities [Line Items] |  |
Face amount | 0 |
Year two |  |
Disclosure of Financial Assets and Financial Liabilities [Line Items] |  |
Face amount | 6,251 |
Year three |  |
Disclosure of Financial Assets and Financial Liabilities [Line Items] |  |
Face amount | 4,358 |
Year four |  |
Disclosure of Financial Assets and Financial Liabilities [Line Items] |  |
Face amount | 6,819 |
Year five |  |
Disclosure of Financial Assets and Financial Liabilities [Line Items] |  |
Face amount | 0 |
Six years and thereafter |  |
Disclosure of Financial Assets and Financial Liabilities [Line Items] |  |
Face amount | 49,788 |
Interest rate swaps | Year one |  |
Disclosure of Financial Assets and Financial Liabilities [Line Items] |  |
Face amount |  | 2
Fair value Liability |  | 0
Fair Value Asset |  | 65
Interest rate swaps | Year three |  |
Disclosure of Financial Assets and Financial Liabilities [Line Items] |  |
Face amount | 2,339 |
Fair value Liability | 0 |
Fair Value Asset | 1 |
Interest rate swaps | Six years and thereafter |  |
Disclosure of Financial Assets and Financial Liabilities [Line Items] |  |
Face amount | 10,134 | 8,447
Fair value Liability | 1,784 | 1,381
Fair Value Asset | 0 | 0
Currency swap contract | Year one |  |
Disclosure of Financial Assets and Financial Liabilities [Line Items] |  |
Face amount | 4,483 | 954
Fair value Liability | 0 | 35
Fair Value Asset | 679 | 103
Currency swap contract | Year two |  |
Disclosure of Financial Assets and Financial Liabilities [Line Items] |  |
Face amount | 7,243 | 49,834
Fair value Liability | 1 | 2
Fair Value Asset | 547 | 119
Currency swap contract | Year three |  |
Disclosure of Financial Assets and Financial Liabilities [Line Items] |  |
Face amount | 19,300 | 6,045
Fair value Liability | 137 | 1,017
Fair Value Asset | 836 | 98
Currency swap contract | Year four |  |
Disclosure of Financial Assets and Financial Liabilities [Line Items] |  |
Face amount | 6,819 | 8,949
Fair value Liability | (211) | (1,391)
Fair Value Asset | 0 | 9
Currency swap contract | Year five |  |
Disclosure of Financial Assets and Financial Liabilities [Line Items] |  |
Face amount | 2,182 | 6,009
Fair value Liability | 0 | 0
Fair Value Asset | 615 | 89
Currency swap contract | 2030 |  |
Disclosure of Financial Assets and Financial Liabilities [Line Items] |  |
Face amount | 26,086 | 13,633
Fair value Liability | 68 | 803
Fair Value Asset | 3,166 | 0
Currency swap contract | 2033 |  |
Disclosure of Financial Assets and Financial Liabilities [Line Items] |  |
Face amount | 263 |
Fair value Liability | 31 |
Fair Value Asset | 0 |
Currency swap contract | 2033 |  |
Disclosure of Financial Assets and Financial Liabilities [Line Items] |  |
Face amount | 10,000 | 4,931
Fair value Liability | (2,248) | 0
Fair Value Asset | 0 | 117
Currency swap contract | 2035 |  |
Disclosure of Financial Assets and Financial Liabilities [Line Items] |  |
Face amount | 12,492 | 10,000
Fair value Liability | 0 | 3,809
Fair Value Asset | 3,588 | $ 0
Currency swap contract | Between Twenty One and Twenty Six Years |  |
Disclosure of Financial Assets and Financial Liabilities [Line Items] |  |
Face amount | 3,471 |
Fair value Liability | 0 |
Fair Value Asset | $ 1,714 |

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