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Employee Benefits - Summary of the Actuarial Results Generated for the Pension and Retirement Plans as well as the Medical Services (Detail) - MXN ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Disclosure of actuarial results generated for the pension and retirement plans [line items] |  |  |
Balance at the beginning of the year | $ 128,400,391 | $ 131,410,989 | $ 154,847,297
Current service cost | 2,044,102 | 1,534,180 | 2,090,896
Interest cost on projected benefit obligation | 33,203,706 | 30,565,134 | 28,913,257
Expected return on plan assets | (20,251,931) | (18,819,322) | (15,112,669)
Changes in the asset ceiling during the period and others | 585,667 | 398,399 | 215,544
Past service costs and other | (177,054) | 142,911 | 139,910
Actuarial gain for changes in experience | (20,645) | (43,603) | (23,024)
Actuarial (gain) loss from changes in demographic assumption | 134 | (64) | (48)
Actuarial (gain) loss from changes in financial assumptions | 30,958 | (88,990) | (6,907)
Net period cost | 15,414,937 | 13,688,645 | 16,216,959
Actuarial loss for changes in experience | 10,632,144 | 2,747,706 | 10,728,950
Actuarial loss/(gain) from changes in demographic assumptions | (430,315) | 55,037 | (104,568)
Actuarial (gain)/loss from changes in financial assumptions | 1,900,436 | (9,838,708) | (4,099,321)
Changes in the asset ceiling during the period and others | (2,247,990) | 1,283,501 | 969,433
Return on plan assets greater than discount rate (shortfall) | (6,210,593) | 13,719,181 | (22,198,615)
Recognized in other comprehensive income | 3,643,682 | 7,966,717 | (14,704,121)
Contributions to the pension plan made by the Company | (10,853) | 516,280 | 311,108
Benefits paid | (297,159) | (281,579) | (225,876)
Payments to employees | (10,868,600) | (23,753,735) | (25,042,314)
Plan changes | (29,383) | 12,461 |
Effect of translation | (1,832,409) | (1,159,387) | 7,936
Others | (13,038,404) | (24,665,960) | (24,949,146)
Balance at the end of the year | 134,420,606 | 128,400,391 | 131,410,989
Less short-term portion | (232,102) | (275,209) | (236,304)
Non-current obligation | 134,188,504 | 128,125,182 | 131,174,685
Defined benefit obligation [member] |  |  |
Disclosure of actuarial results generated for the pension and retirement plans [line items] |  |  |
Balance at the beginning of the year | 330,862,941 | 345,315,712 | 343,003,240
Current service cost | 2,044,102 | 1,534,180 | 2,090,896
Interest cost on projected benefit obligation | 33,203,706 | 30,565,134 | 28,913,257
Past service costs and other | (322,700) |  |
Actuarial gain for changes in experience | (20,645) | (43,603) | (23,024)
Actuarial (gain) loss from changes in demographic assumption | 134 | (64) | (48)
Actuarial (gain) loss from changes in financial assumptions | 30,958 | (88,990) | (6,907)
Net period cost | 34,935,555 | 31,966,657 | 30,974,174
Actuarial loss for changes in experience | 10,632,144 | 2,747,706 | 10,728,950
Actuarial loss/(gain) from changes in demographic assumptions | (430,315) | 55,037 | (104,568)
Actuarial (gain)/loss from changes in financial assumptions | 1,900,436 | (9,838,708) | (4,099,321)
Return on plan assets greater than discount rate (shortfall) |  |  | (22,198,615)
Recognized in other comprehensive income | 12,102,265 | (7,035,965) | 6,525,061
Contributions made by plan participants | 45,404 | 78,642 | 99,201
Benefits paid | (27,844,968) | (13,502,781) | (10,574,420)
Payments to employees | (10,868,600) | (23,753,735) | (25,042,314)
Plan changes | (29,383) | 12,461 |
Effect of translation | (4,745,061) | (2,218,050) | 330,770
Others | (43,442,608) | (39,383,463) | (35,186,763)
Balance at the end of the year | 334,458,153 | 330,862,941 | 345,315,712
Less short-term portion | (232,102) | (275,209) | (236,304)
Non-current obligation | 334,226,051 | 330,587,732 | 345,079,408
Plan assets [member] |  |  |
Disclosure of actuarial results generated for the pension and retirement plans [line items] |  |  |
Balance at the beginning of the year | (208,526,619) | (218,327,182) | (191,549,583)
Expected return on plan assets | (20,251,931) | (18,819,322) | (15,112,669)
Past service costs and other | 145,646 | 142,911 | 139,910
Net period cost | (20,106,285) | (18,676,411) | (14,972,759)
Return on plan assets greater than discount rate (shortfall) | (6,210,593) | 13,719,181 |
Recognized in other comprehensive income | (6,210,593) | 13,719,181 | (22,198,615)
Contributions made by plan participants | (45,404) | (78,642) | (99,201)
Contributions to the pension plan made by the Company | (10,853) | 516,280 | 311,108
Benefits paid | 27,547,809 | 13,221,202 | 10,348,544
Effect of translation | 3,259,358 | 1,098,953 | (166,676)
Others | 30,750,910 | 14,757,793 | 10,393,775
Balance at the end of the year | (204,092,587) | (208,526,619) | (218,327,182)
Non-current obligation | (204,092,587) | (208,526,619) | (218,327,182)
Effect of asset celling [member] |  |  |
Disclosure of actuarial results generated for the pension and retirement plans [line items] |  |  |
Balance at the beginning of the year | 6,064,069 | 4,422,459 | 3,393,640
Changes in the asset ceiling during the period and others | 585,667 | 398,399 | 215,544
Net period cost | 585,667 | 398,399 | 215,544
Changes in the asset ceiling during the period and others | (2,247,990) | 1,283,501 | 969,433
Recognized in other comprehensive income | (2,247,990) | 1,283,501 | 969,433
Effect of translation | (346,706) | (40,290) | (156,158)
Others | (346,706) | (40,290) | (156,158)
Balance at the end of the year | 4,055,040 | 6,064,069 | 4,422,459
Non-current obligation | $ 4,055,040 | $ 6,064,069 | $ 4,422,459

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- Definition The decrease (increase) in a net defined benefit liability (asset) resulting from actuarial gains (losses) arising from changes in demographic assumptions that result in remeasurements of the net defined benefit liability (asset). Demographic assumptions deal with matters such as: (a) mortality; (b) rates of employee turnover, disability and early retirement; (c) the proportion of plan members with dependants who will be eligible for benefits; (d) the proportion of plan members who will select each form of payment option available under the plan terms; and (e) claim rates under medical plans. [Refer: Net defined benefit liability (asset)] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2023-01-01 -Paragraph 141 -Subparagraph c -Clause ii -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2023-en-r&anchor=para_141_c_ii&doctype=Standard -URIDate 2023-03-23 + Details
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- Definition The decrease (increase) in a net defined benefit liability (asset) resulting from actuarial gains (losses) arising from changes in financial assumptions that result in remeasurements of the net defined benefit liability (asset). Financial assumptions deal with items such as: (a) the discount rate; (b) benefit levels, excluding any cost of the benefits to be met by employees, and future salary; (c) in the case of medical benefits, future medical costs, including claim handling costs (ie the costs that will be incurred in processing and resolving claims, including legal and adjuster's fees); and (d) taxes payable by the plan on contributions relating to service before the reporting date or on benefits resulting from that service. [Refer: Net defined benefit liability (asset)] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2023-01-01 -Paragraph 141 -Subparagraph c -Clause iii -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2023-en-r&anchor=para_141_c_iii&doctype=Standard -URIDate 2023-03-23 + Details
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- Definition The amount of benefits paid or payable for retirement benefit plans. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 26 -IssueDate 2023-01-01 -Paragraph 35 -Subparagraph b -Clause v -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=26&code=ifrs-tx-2023-en-r&anchor=para_35_b_v&doctype=Standard -URIDate 2023-03-23 + Details
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- Definition The decrease (increase) in the net defined benefit liability (asset) resulting from contributions to a defined benefit plan by plan participants. [Refer: Net defined benefit liability (asset); Defined benefit plans [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2023-01-01 -Paragraph 141 -Subparagraph f -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2023-en-r&anchor=para_141_f&doctype=Standard -URIDate 2023-03-23 + Details
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- Definition The amount of current net defined benefit asset. [Refer: Net defined benefit asset] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2023-01-01 -Paragraph 55 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2023-en-r&anchor=para_55&doctype=Standard -URIDate 2023-03-23 + Details
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- Definition The increase (decrease) in the net defined benefit liability (asset) resulting from employee service in the current period. [Refer: Net defined benefit liability (asset)] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2023-01-01 -Paragraph 141 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2023-en-r&anchor=para_141_a&doctype=Standard -URIDate 2023-03-23 + Details
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- Definition The decrease (increase) in the net defined benefit liability (asset) resulting from the gain (loss) on changes in the effect of limiting a net defined benefit asset to the asset ceiling, excluding amounts included in interest income or expense. [Refer: Interest income (expense); Net defined benefit liability (asset); Increase (decrease) in net defined benefit liability (asset) resulting from interest expense (income)] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2023-01-01 -Paragraph 141 -Subparagraph c -Clause iv -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2023-en-r&anchor=para_141_c_iv&doctype=Standard -URIDate 2023-03-23 + Details
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- Definition The decrease (increase) in a net defined benefit liability (asset) resulting from the remeasurement of that net defined benefit liability (asset). [Refer: Net defined benefit liability (asset)] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2023-01-01 -Paragraph 141 -Subparagraph c -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2023-en-r&anchor=para_141_c&doctype=Standard -URIDate 2023-03-23 + Details
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- Definition The increase (decrease) in the net defined benefit liability (asset) resulting from changes in foreign exchange rates. [Refer: Net defined benefit liability (asset)] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2023-01-01 -Paragraph 141 -Subparagraph e -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2023-en-r&anchor=para_141_e&doctype=Standard -URIDate 2023-03-23 + Details
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- Definition The increase (decrease) in the net defined benefit liability (asset) resulting from changes that the entity does not separately disclose in the same statement or note. [Refer: Net defined benefit liability (asset)] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 19 -IssueDate 2023-01-01 -Paragraph 141 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2023-en-r&anchor=para_141&doctype=Standard -URIDate 2023-03-23 + Details
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- Definition The increase (decrease) in the net defined benefit liability (asset) resulting from the passage of time. [Refer: Interest expense; Net defined benefit liability (asset)] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2023-01-01 -Paragraph 141 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2023-en-r&anchor=para_141_b&doctype=Standard -URIDate 2023-03-23 + 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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- Definition The increase (decrease) in the net defined benefit liability (asset) resulting from past service cost. Past service cost is the change in the present value of the defined benefit obligation for employee service in prior periods, resulting from a plan amendment (the introduction or withdrawal of, or changes to, a defined benefit plan) or a curtailment (a significant reduction by the entity in the number of employees covered by a plan). [Refer: Net defined benefit liability (asset); Defined benefit plans [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2023-01-01 -Paragraph 141 -Subparagraph d -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2023-en-r&anchor=para_141_d&doctype=Standard -URIDate 2023-03-23 + Details
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- Definition The decrease (increase) in the net defined benefit liability (asset) resulting from payments from the plan in respect of settlements. [Refer: Decrease (increase) in net defined benefit liability (asset) resulting from gains (losses) arising from settlements; Net defined benefit liability (asset); Defined benefit plans [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2023-01-01 -Paragraph 141 -Subparagraph g -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2023-en-r&anchor=para_141_g&doctype=Standard -URIDate 2023-03-23 + Details
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- Definition The decrease (increase) in the net defined benefit liability (asset) resulting from the return on plan assets, excluding amounts included in interest income or expense. The return on plan assets is interest, dividends and other revenue derived from the plan assets, together with realised and unrealised gains or losses on the plan assets, less any costs of managing plan assets and less any tax payable by the plan itself, other than tax included in the actuarial assumptions used to measure the present value of the defined benefit obligation. [Refer: Plan assets [member]; Net defined benefit liability (asset); Actuarial assumptions [member]; Increase (decrease) in net defined benefit liability (asset) resulting from interest expense (income)] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2023-01-01 -Paragraph 141 -Subparagraph c -Clause i -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2023-en-r&anchor=para_141_c_i&doctype=Standard -URIDate 2023-03-23 + Details
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