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Post-employment Benefits - Changes in net post-employment (Details) - MXN ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018
Post-employment pension plans. |  |
Beginning of year | $ 962,497 | $ 716,095
Net periodic cost | 259,064 | 171,156
Remeasurement adjustments | 247,092 | 97,086
Benefits paid | (541) | (21,840)
End of year | 1,468,112 | 962,497
Pensions |  |
Post-employment pension plans. |  |
Beginning of year | 926,050 |
Net periodic cost | 194,819 |
Remeasurement adjustments | 183,002 | 70,861
Benefits paid | (15,087) |
End of year | 1,288,784 | 926,050
Seniority Premiums |  |
Post-employment pension plans. |  |
Beginning of year | 36,447 |
Net periodic cost | 64,245 |
Remeasurement adjustments | 64,090 | 26,225
Benefits paid | 14,546 |
End of year | $ 179,328 | $ 36,447

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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 2019-01-01 -Paragraph 141 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=19&code=ifrs-tx-2019-en-r&anchor=para_141_c&doctype=Standard -URIDate 2019-03-27 + 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 2019-01-01 -Paragraph 140 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=19&code=ifrs-tx-2019-en-r&anchor=para_140_a&doctype=Standard -URIDate 2019-03-27 + 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 2019-01-01 -Paragraph 141 -Subparagraph g -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=19&code=ifrs-tx-2019-en-r&anchor=para_141_g&doctype=Standard -URIDate 2019-03-27 + 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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