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Post-employment Benefits - Funded status (Details) - MXN ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | --- | ---
Post-employment pension plans. |  |  |
Unfunded status of the plan assets | $ 1,913,680 | $ 2,080,651 | $ 1,468,112
Pensions |  |  |
Post-employment pension plans. |  |  |
Unfunded status of the plan assets | 1,463,805 | 1,724,801 |
Seniority Premiums |  |  |
Post-employment pension plans. |  |  |
Unfunded status of the plan assets | $ 449,875 | $ 355,850 |

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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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