Post-employment Benefits - Post-employment benefits (Details) - MXN ($) $ in Thousands	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020
Post-employment benefit plans
Defined benefit obligation	$ 3,184,365	$ 3,276,400
Plan assets	1,270,685	1,195,749
Unfunded status of plans	1,913,680	2,080,651
Remeasurement adjustments	(279,825)	344,313
Pensions
Post-employment benefit plans
Defined benefit obligation	2,442,697	2,634,125
Plan assets	978,892	909,324
Unfunded status of plans	1,463,805	1,724,801
Remeasurement adjustments	(327,898)	250,283
Seniority Premiums
Post-employment benefit plans
Defined benefit obligation	741,668	642,275
Plan assets	291,793	286,425
Unfunded status of plans	449,875	355,850
Remeasurement adjustments	$ 48,073	$ 94,030

The present value, without deducting any plan assets, of expected future payments required to settle the obligation resulting from employee service in the current and prior periods. [Refer: Plan assets, at fair value]

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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-IssueDate 2021-01-01
-Paragraph 57
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+ References

No definition available.

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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 2021-01-01
-Paragraph 141
-Subparagraph c
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=19&code=ifrs-tx-2021-en-r&anchor=para_141_c&doctype=Standard
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- 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]]

+ References

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The fair value of any plan assets, less the present value of the defined benefit obligation. [Refer: Plan assets [member]]

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