Balances and Transactions in Foreign Currencies - Balances (Details) - MXN ($) $ in Millions |
Dec. 31, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Disclosure of Balances and Transactions in Foreign Currencies [line items] | ||
| Short-Term Assets | $ 60,488 | $ 94,606 |
| Long-Term Assets | 5,107 | 1,869 |
| Short-Term Liabilities | 17,176 | 8,618 |
| Long-Term Liabilities | 93,187 | 103,900 |
| U.S. dollars | ||
| Disclosure of Balances and Transactions in Foreign Currencies [line items] | ||
| Short-Term Assets | 51,356 | 93,411 |
| Long-Term Assets | 1,880 | 791 |
| Short-Term Liabilities | 5,893 | 7,981 |
| Long-Term Liabilities | 81,880 | 81,879 |
| Euros | ||
| Disclosure of Balances and Transactions in Foreign Currencies [line items] | ||
| Short-Term Assets | 8,911 | 1,149 |
| Long-Term Assets | 0 | 0 |
| Short-Term Liabilities | 11,267 | 611 |
| Long-Term Liabilities | 11,307 | 22,021 |
| Other currencies | ||
| Disclosure of Balances and Transactions in Foreign Currencies [line items] | ||
| Short-Term Assets | 221 | 46 |
| Long-Term Assets | 3,227 | 1,078 |
| Short-Term Liabilities | 16 | 26 |
| Long-Term Liabilities | $ 0 | $ 0 |