Employee Benefits - Securities in Related Parties Included in Portfolio Fund (Details) - MXN ($) $ in Millions |
Dec. 31, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Debt securities | BBVA Bancomer, S.A de C.V. | ||
| Disclosure of defined benefit plans [line items] | ||
| Investments in securities | $ 0 | $ 43 |
| Debt securities | Grupo Industrial Bimbo, S.A.B. de C. V. | ||
| Disclosure of defined benefit plans [line items] | ||
| Investments in securities | 19 | 19 |
| Equity | Grupo Industrial Bimbo, S.A.B. de C. V. | ||
| Disclosure of defined benefit plans [line items] | ||
| Investments in securities | $ 1 | $ 1 |