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Employee Benefits - Liabilities for Employee Benefits (Details) - MXN ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Disclosure of defined benefit plans [line items] |  |
Defined benefit obligation (plan funds) | $ 6,920 | $ 7,048
Pension and Retirement Plans |  |
Disclosure of defined benefit plans [line items] |  |
Defined benefit obligation (plan funds) | 4,402 | 4,640
Pension and Retirement Plans | Discontinued operations |  |
Disclosure of defined benefit plans [line items] |  |
Defined benefit obligation (plan funds) | (195) | 0
Pension and Retirement Plans | Defined benefit obligation |  |
Disclosure of defined benefit plans [line items] |  |
Defined benefit obligation (plan funds) | 15,560 | 15,113
Pension and Retirement Plans | Plan assets |  |
Disclosure of defined benefit plans [line items] |  |
Defined benefit obligation (plan funds) | (14,061) | (14,324)
Pension and Retirement Plans | Effect due to asset ceiling |  |
Disclosure of defined benefit plans [line items] |  |
Defined benefit obligation (plan funds) | 3,098 | 3,851
Seniority Premiums |  |
Disclosure of defined benefit plans [line items] |  |
Defined benefit obligation (plan funds) | 2,058 | 1,940
Seniority Premiums | Discontinued operations |  |
Disclosure of defined benefit plans [line items] |  |
Defined benefit obligation (plan funds) | (235) | 0
Seniority Premiums | Defined benefit obligation |  |
Disclosure of defined benefit plans [line items] |  |
Defined benefit obligation (plan funds) | 2,416 | 2,068
Seniority Premiums | Plan assets |  |
Disclosure of defined benefit plans [line items] |  |
Defined benefit obligation (plan funds) | (123) | (128)
Post-Retirement Medical Services |  |
Disclosure of defined benefit plans [line items] |  |
Defined benefit obligation (plan funds) | 460 | 468
Post-Retirement Medical Services | Discontinued operations |  |
Disclosure of defined benefit plans [line items] |  |
Defined benefit obligation (plan funds) | (49) | 0
Post-Retirement Medical Services | Defined benefit obligation |  |
Disclosure of defined benefit plans [line items] |  |
Defined benefit obligation (plan funds) | 604 | 556
Post-Retirement Medical Services | Plan assets |  |
Disclosure of defined benefit plans [line items] |  |
Defined benefit obligation (plan funds) | $ (95) | $ (88)

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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table. + References No definition available. + Details
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- Definition The amount of deficit or surplus in a defined benefit plan, adjusted for any effect of limiting a net defined benefit asset to the asset ceiling. [Refer: Defined benefit plans [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2023-01-01 -Paragraph 140 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2023-en-r&anchor=para_140_a&doctype=Standard -URIDate 2023-03-23 + Details
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