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Cash and cash equivalents: | 12 Months Ended
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Dec. 31, 2018
Cash and cash equivalents [abstract] |
Disclosure of cash and cash equivalents [text block] | Note 5 - Cash and cash equivalents:
|  | December 31, |
|  | 2017 |  |  | 2018 |
Cash and cash held at banks |  | Ps | 4,417,791 |  |  | Ps | 3,713,072 |
Short-term investments |  |  | 240,701 |  |  |  | 841,295 |
Fiduciary rights (*) |  |  | 18,962 |  |  |  | 30,140 |
Total cash and cash equivalents |  | Ps | 4,677,454 |  |  | Ps | 4,584,507 |
| (*) | Corresponds to the fiduciary’s agreement 2875 of Airplan, Company’s subsidiary, signed with Fiduciaria Bancolombia to administer the resources of the concession contract. See Notes 8.2 and 18.5.
5.1) Restricted cash and cash equivalents At December 31, 2017 and 2018 restricted cash and cash equivalents includes Ps 106,350 and Ps 47,332 , respectively, that amount was collected by Aerostar from PFCs and are restricted to funding investment projects in airport infrastructure authorized by the FAA. See Notes 18.6 and 9.

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- Definition The disclosure of cash and cash equivalents. [Refer: Cash and cash equivalents] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2018-01-01 -Paragraph 10 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_10_e&doctype=Standard -URIDate 2018-03-16 + Details
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