Employee Benefits - Rollforward, Balance of Plan Assets (Details) - Plan assets - MXN ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Disclosure of net defined benefit liability (asset) [line items] | |||
| Initial balance | $ 16,461 | $ 14,279 | $ 14,540 |
| Actual return on trust assets | 508 | 497 | 522 |
| Return on plan assets excluding amounts included in interest income | 404 | 886 | 0 |
| Foreign exchange loss | 633 | 1,288 | (150) |
| Life annuities | 0 | (25) | 6 |
| Benefits paid | (1,191) | (623) | (731) |
| Plan amendments | (47) | (65) | (126) |
| Employees´contributions | 106 | 105 | 102 |
| Employer´s contributions | 133 | 133 | 130 |
| Administration cost | (15) | (14) | (14) |
| Ending balance | $ 16,992 | $ 16,461 | $ 14,279 |
| X | ||||||||||
- Definition Decrease (increase) in net defined benefit liability (asset) resulting from return on plan assets including interest income or expense No definition available.
|
| X | ||||||||||
- Definition Increase (Decrease) In Net Defined Benefit Liability (Asset) Resulting from Administrative Cost No definition available.
|
| X | ||||||||||
- Definition Life annuities, net defined benefit liability (asset). No definition available.
|
| X | ||||||||||
- Definition The amount of benefits paid or payable for retirement benefit plans. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition The decrease (increase) in net defined benefit liability (asset) resulting from contributions to a defined benefit plan by the employer. [Refer: Net defined benefit liability (asset); Defined benefit plans [domain]] Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- 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 [domain]] Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- 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. No definition available.
|
| X | ||||||||||
- Definition The increase (decrease) in the net defined benefit liability (asset) resulting from changes in foreign exchange rates. [Refer: Net defined benefit liability (asset)] Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- 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 [domain]] Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition The fair value of defined benefit plan assets. Plan assets comprise assets held by a long-term employee benefit fund and qualifying insurance policies. [Refer: At fair value [member]] Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
|
| X | ||||||||||
- 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 [domain]; Increase (decrease) in net defined benefit liability (asset) resulting from interest expense (income)] Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Details
|