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Post-Employment and Other Non-current Employee Benefits - Variation in Assumptions (Detail) - MXN ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Disclosure of net defined benefit liability (asset) [line items] |  |  |  |
Remeasurements of the Net Defined Benefit Liability | $ 747 | $ 912 | $ 1,240 | $ 1,173
Pension and Retirement Plans |  |  |  |
Disclosure of net defined benefit liability (asset) [line items] |  |  |  |
Remeasurements of the Net Defined Benefit Liability | 2,725 | 2,911 |  |
Net benefit cost recognized in the consolidated statements of income |  |  |  |
Disclosure of net defined benefit liability (asset) [line items] |  |  |  |
Current Service Cost | 320 | 340 | 328 |
Past Service Cost | 163 | 53 | 0 |
(Gain) or Loss on Settlement or curtailment | (133) | (94) | 0 |
Net Interest on the Net Defined Benefit Liability | 297 | 286 | 248 |
Net benefit cost recognized in the consolidated statements of income | Pension and Retirement Plans |  |  |  |
Disclosure of net defined benefit liability (asset) [line items] |  |  |  |
Current Service Cost | 233 | 246 | 244 |
Past Service Cost | 155 | 47 | 0 |
(Gain) or Loss on Settlement or curtailment | (126) | (85) | 0 |
Net Interest on the Net Defined Benefit Liability | 222 | 141 | 197 |
Net benefit cost recognized in the consolidated statements of income | Seniority premiums |  |  |  |
Disclosure of net defined benefit liability (asset) [line items] |  |  |  |
Current Service Cost | 87 | 94 | 84 |
Past Service Cost | 8 | 6 | 0 |
(Gain) or Loss on Settlement or curtailment | (7) | (9) | 0 |
Net Interest on the Net Defined Benefit Liability | 75 | 145 | 51 |
Net benefit cost recognized in the consolidated statements of income | Actuarial Assumption of Discount Rates |  |  |  |
Disclosure of net defined benefit liability (asset) [line items] |  |  |  |
Current Service Cost | 291 | 344 |  |
Past Service Cost | 151 | 175 |  |
(Gain) or Loss on Settlement or curtailment | (124) | (143) |  |
Net Interest on the Net Defined Benefit Liability | 240 | 346 |  |
Net benefit cost recognized in the consolidated statements of income | Actuarial Assumption of Discount Rates | Pension and Retirement Plans |  |  |  |
Disclosure of net defined benefit liability (asset) [line items] |  |  |  |
Current Service Cost | 211 | 250 |  |
Past Service Cost | 144 | 167 |  |
(Gain) or Loss on Settlement or curtailment | (118) | (136) |  |
Net Interest on the Net Defined Benefit Liability | 173 | 261 |  |
Net benefit cost recognized in the consolidated statements of income | Actuarial Assumption of Discount Rates | Seniority premiums |  |  |  |
Disclosure of net defined benefit liability (asset) [line items] |  |  |  |
Current Service Cost | 80 | 94 |  |
Past Service Cost | 7 | 8 |  |
(Gain) or Loss on Settlement or curtailment | (6) | (7) |  |
Net Interest on the Net Defined Benefit Liability | 67 | 85 |  |
Net benefit cost recognized in the consolidated statements of income | Actuarial Assumption of Expected Rates of Salary Increases |  |  |  |
Disclosure of net defined benefit liability (asset) [line items] |  |  |  |
Current Service Cost | 346 | 289 |  |
Past Service Cost | 180 | 146 |  |
(Gain) or Loss on Settlement or curtailment | (142) | (122) |  |
Net Interest on the Net Defined Benefit Liability | 331 | 256 |  |
Net benefit cost recognized in the consolidated statements of income | Actuarial Assumption of Expected Rates of Salary Increases | Pension and Retirement Plans |  |  |  |
Disclosure of net defined benefit liability (asset) [line items] |  |  |  |
Current Service Cost | 253 | 209 |  |
Past Service Cost | 171 | 139 |  |
(Gain) or Loss on Settlement or curtailment | (134) | (116) |  |
Net Interest on the Net Defined Benefit Liability | 249 | 187 |  |
Net benefit cost recognized in the consolidated statements of income | Actuarial Assumption of Expected Rates of Salary Increases | Seniority premiums |  |  |  |
Disclosure of net defined benefit liability (asset) [line items] |  |  |  |
Current Service Cost | 93 | 80 |  |
Past Service Cost | 9 | 7 |  |
(Gain) or Loss on Settlement or curtailment | (8) | (6) |  |
Net Interest on the Net Defined Benefit Liability | 82 | 69 |  |
Net benefit cost recognized in consolidated statements of accumulated other comprehensive income |  |  |  |
Disclosure of net defined benefit liability (asset) [line items] |  |  |  |
Remeasurements of the Net Defined Benefit Liability | 747 | 912 | 1,240 |
Net benefit cost recognized in consolidated statements of accumulated other comprehensive income | Pension and Retirement Plans |  |  |  |
Disclosure of net defined benefit liability (asset) [line items] |  |  |  |
Remeasurements of the Net Defined Benefit Liability | 625 | 804 | 1,038 |
Net benefit cost recognized in consolidated statements of accumulated other comprehensive income | Seniority premiums |  |  |  |
Disclosure of net defined benefit liability (asset) [line items] |  |  |  |
Remeasurements of the Net Defined Benefit Liability | 122 | 108 | $ 202 |
Net benefit cost recognized in consolidated statements of accumulated other comprehensive income | Actuarial Assumption of Discount Rates |  |  |  |
Disclosure of net defined benefit liability (asset) [line items] |  |  |  |
Remeasurements of the Net Defined Benefit Liability | 751 | 829 |  |
Net benefit cost recognized in consolidated statements of accumulated other comprehensive income | Actuarial Assumption of Discount Rates | Pension and Retirement Plans |  |  |  |
Disclosure of net defined benefit liability (asset) [line items] |  |  |  |
Remeasurements of the Net Defined Benefit Liability | 634 | 692 |  |
Net benefit cost recognized in consolidated statements of accumulated other comprehensive income | Actuarial Assumption of Discount Rates | Seniority premiums |  |  |  |
Disclosure of net defined benefit liability (asset) [line items] |  |  |  |
Remeasurements of the Net Defined Benefit Liability | 117 | 137 |  |
Net benefit cost recognized in consolidated statements of accumulated other comprehensive income | Actuarial Assumption of Expected Rates of Salary Increases |  |  |  |
Disclosure of net defined benefit liability (asset) [line items] |  |  |  |
Remeasurements of the Net Defined Benefit Liability | 824 | 787 |  |
Net benefit cost recognized in consolidated statements of accumulated other comprehensive income | Actuarial Assumption of Expected Rates of Salary Increases | Pension and Retirement Plans |  |  |  |
Disclosure of net defined benefit liability (asset) [line items] |  |  |  |
Remeasurements of the Net Defined Benefit Liability | 681 | 672 |  |
Net benefit cost recognized in consolidated statements of accumulated other comprehensive income | Actuarial Assumption of Expected Rates of Salary Increases | Seniority premiums |  |  |  |
Disclosure of net defined benefit liability (asset) [line items] |  |  |  |
Remeasurements of the Net Defined Benefit Liability | $ 143 | $ 115 |  |

X
- 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 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 decrease (increase) in the net defined benefit liability (asset) resulting from settlements. Settlements are transactions that eliminate all further legal or constructive obligations for part or all of the benefits provided under a defined benefit plan, other than a payment of benefits to, or on behalf of, employees that is set out in the terms of the plan and included in the actuarial assumptions. [Refer: Net defined benefit liability (asset); Defined benefit plans [member]; Actuarial assumptions [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 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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