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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, 2021 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Disclosure of net defined benefit liability (asset) [line items] |  |  |  |
Net defined benefit liability | $ 1,240 | $ 1,173 | $ 855 | $ 344
Total post-employment and other non-current employee benefits | 4,126 | 3,838 |  |
Pension and Retirement Plans |  |  |  |
Disclosure of net defined benefit liability (asset) [line items] |  |  |  |
Vested benefit obligation | 952 | 996 |  |
Non-vested benefit obligation | 1,876 | 1,644 |  |
Accumulated benefit obligation | 2,828 | 2,640 |  |
Excess of projected defined benefit obligation over accumulated benefit obligation | 1,687 | 1,671 |  |
Defined benefit obligation | 4,515 | 4,311 |  |
Pension plan funds at fair value | (1,234) | (1,201) |  |
Net defined benefit liability | 3,281 | 3,110 |  |
Seniority Premiums |  |  |  |
Disclosure of net defined benefit liability (asset) [line items] |  |  |  |
Vested benefit obligation | 289 | 307 |  |
Non-vested benefit obligation | 232 | 224 |  |
Accumulated benefit obligation | 521 | 531 |  |
Excess of projected defined benefit obligation over accumulated benefit obligation | 457 | 334 |  |
Defined benefit obligation | 978 | 865 |  |
Pension plan funds at fair value | (133) | (137) |  |
Net defined benefit liability | $ 845 | $ 728 |  |

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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 2021-01-01 -Paragraph 140 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=19&code=ifrs-tx-2021-en-r&anchor=para_140_a&doctype=Standard -URIDate 2021-03-24 + 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 2021-01-01 -Paragraph 78 -Subparagraph d -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2021-en-r&anchor=para_78_d&doctype=Standard -URIDate 2021-03-24 + Details
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- Definition Accumulated defined benefit obligation + References No definition available. + 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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- Definition Vested defined benefit obligation + References No definition available. + Details
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- Details
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- Details
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