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Post-employment Benefits - Funded status (Details) - MXN ($) $ in Thousands | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
--- | --- | --- | ---
Post-employment pension plans. |  |  |
Underfunded (overfunded) status of the plan assets | $ 716,095 | $ 520,473 | $ 407,179
Pensions |  |  |
Post-employment pension plans. |  |  |
Underfunded (overfunded) status of the plan assets | 733,294 | 684,733 |
Seniority Premiums |  |  |
Post-employment pension plans. |  |  |
Underfunded (overfunded) status of the plan assets | $ (17,199) | $ (164,260) |

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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 2017-01-01 -Paragraph 140 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=19&date=2017-03-01&anchor=para_140_a&doctype=Standard -URIDate 2017-03-09 + Details
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- Details
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