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Post-Employment and Other Non-current Employee Benefits - Balances of Liabilities for Post-Employment and Other Non-Current Employee Benefits (Detail) - MXN ($) $ in Millions | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Disclosure of net defined benefit liability (asset) [line items] |  |  |  |
Net defined benefit liability | $ 1,654 | $ 747 | $ 912 | $ 1,240
Post-employment and other non-current employee benefits | 4,867 | 3,560 |  |
Pension and Retirement Plans |  |  |  |
Disclosure of net defined benefit liability (asset) [line items] |  |  |  |
Vested benefit obligation | 978 | 653 |  |
Non-vested benefit obligation | 2,506 | 2,091 |  |
Accumulated benefit obligation | 3,484 | 2,744 |  |
Excess of projected defined benefit obligation over accumulated benefit obligation | 1,600 | 1,284 |  |
Defined benefit obligation | 5,084 | 4,028 |  |
Pension plan funds at fair value | (1,429) | (1,303) |  |
Net defined benefit liability | 3,655 | 2,725 |  |
Seniority Premiums |  |  |  |
Disclosure of net defined benefit liability (asset) [line items] |  |  |  |
Vested benefit obligation | 500 | 320 |  |
Non-vested benefit obligation | 445 | 344 |  |
Accumulated benefit obligation | 945 | 664 |  |
Excess of projected defined benefit obligation over accumulated benefit obligation | 393 | 294 |  |
Defined benefit obligation | 1,338 | 958 |  |
Pension plan funds at fair value | (126) | (123) |  |
Net defined benefit liability | $ 1,212 | $ 835 |  |

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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 [domain]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2024-01-01 -Paragraph 140 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2024-en-r&anchor=para_140_a&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition The amount of non-current provisions for employee benefits. [Refer: Provisions for employee benefits] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2024-01-01 -Paragraph 78 -Subparagraph d -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_78_d&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition Defined benefit obligation + References No definition available. + Details
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- Definition Defined benefit obligation funds at fair value + References No definition available. + Details
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- Definition Excess of projected defined benefit obligation over accumulated benefit obligation + References No definition available. + Details
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- Details
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- Details
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