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Employee Benefits - Securities in Related Parties Included in Portfolio Fund (Details) - MXN ($) $ in Millions | Dec. 31, 2024 | Dec. 31, 2023
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Debt securities | BBVA Bancomer, S.A de C.V. |  |
Disclosure of defined benefit plans [line items] |  |
Investments in securities | $ 43 | $ 46
Debt securities | Grupo Industrial Bimbo, S.A.B. de C. V. |  |
Disclosure of defined benefit plans [line items] |  |
Investments in securities | 19 | 18
Equity | Grupo Industrial Bimbo, S.A.B. de C. V. |  |
Disclosure of defined benefit plans [line items] |  |
Investments in securities | $ 1 | $ 1

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