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Post-employment Benefits - Changes in net post-employment (Details) - MXN ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019
Post-employment pension plans. |  |
Beginning of year | $ 1,468,112 | $ 962,497
Net periodic cost | 292,026 | 259,064
Contributions | (600) |
Remeasurement adjustments | 344,313 | 247,092
Benefits paid | (23,200) | (541)
End of year | 2,080,651 | 1,468,112
Pensions |  |
Post-employment pension plans. |  |
Beginning of year | 1,288,784 |
Net periodic cost | 186,334 |
Contributions | (600) |
Remeasurement adjustments | 250,283 | 183,002
End of year | 1,724,801 | 1,288,784
Seniority Premiums |  |
Post-employment pension plans. |  |
Beginning of year | 179,328 |
Net periodic cost | 105,692 |
Remeasurement adjustments | 94,030 | 64,090
Benefits paid | (23,200) |
End of year | $ 355,850 | $ 179,328

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- Definition The decrease (increase) in the net defined benefit liability (asset) resulting from contributions to a defined benefit 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 2020-01-01 -Paragraph 141 -Subparagraph f -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=19&code=ifrs-tx-2020-en-r&anchor=para_141_f&doctype=Standard -URIDate 2020-01-01 + 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 2020-01-01 -Paragraph 141 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=19&code=ifrs-tx-2020-en-r&anchor=para_141_c&doctype=Standard -URIDate 2020-01-01 + 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 2020-01-01 -Paragraph 140 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=19&code=ifrs-tx-2020-en-r&anchor=para_140_a&doctype=Standard -URIDate 2020-01-01 + Details
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- Definition The decrease (increase) in the net defined benefit liability (asset) resulting from payments from the plan. [Refer: Net defined benefit liability (asset)] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2020-01-01 -Paragraph 141 -Subparagraph g -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=19&code=ifrs-tx-2020-en-r&anchor=para_141_g&doctype=Standard -URIDate 2020-01-01 + Details
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- Definition The increase (decrease) in the net defined benefit liability (asset) resulting from net periodic pension and seniority premium costs in the current period. + References No definition available. + Details
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- Definition The increase (decrease) in the net defined benefit liability (asset) resulting from payments from or contributions to the plan. + References No definition available. + Details
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