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Employee Benefits - Securities in Related Parties Included in Portfolio Fund (Details) - MXN ($) $ in Millions | Dec. 31, 2021 | Dec. 31, 2020
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Debt | El Puerto de Liverpool, S.A.B. de C.V. |  |
Disclosure of defined benefit plans [line items] |  |
Investments in securities | $ 30 | $ 30
Debt | Grupo Industrial Bimbo, S.A.B. de C. V |  |
Disclosure of defined benefit plans [line items] |  |
Investments in securities | 5 | 5
Debt | Grupo BBVA Bancomer, S.A. de C.V. |  |
Disclosure of defined benefit plans [line items] |  |
Investments in securities | 9 | 10
Debt | Grupo Financiero Scotiabank Inverlat, S.A. de C.V. |  |
Disclosure of defined benefit plans [line items] |  |
Investments in securities | 10 | 10
Capital | El Puerto de Liverpool, S.A.B. de C.V. |  |
Disclosure of defined benefit plans [line items] |  |
Investments in securities | 1 |
Capital | CEMEX, S.A.B. de C.V. |  |
Disclosure of defined benefit plans [line items] |  |
Investments in securities |  | 8
Capital | Grupo Financiero Banorte, S.A.B. de C.V. |  |
Disclosure of defined benefit plans [line items] |  |
Investments in securities |  | 8
Capital | Alfa, S.A.B. de C.V. [member] |  |
Disclosure of defined benefit plans [line items] |  |
Investments in securities | 2 | 3
Capital | Grupo Aeroportuario del Suereste, S.A.B. de C.V. |  |
Disclosure of defined benefit plans [line items] |  |
Investments in securities | 1 | 2
Capital | Others |  |
Disclosure of defined benefit plans [line items] |  |
Investments in securities | $ 4 | $ 4

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