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Employee Benefits - Securities in Related Parties Included in Portfolio Fund (Details) - MXN ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022
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Debt | BBVA Bancomer, S.A de C.V. |  |
Disclosure of defined benefit plans [line items] |  |
Investments in securities | $ 46 | $ 9
Debt | Grupo Industrial Bimbo, S.A.B. de C. V. |  |
Disclosure of defined benefit plans [line items] |  |
Investments in securities | 18 | 5
Equity | Grupo Industrial Bimbo, S.A.B. de C. V. |  |
Disclosure of defined benefit plans [line items] |  |
Investments in securities | $ 1 | $ 0

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