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v3.19.1

Cash and cash equivalents: (Tables) | 12 Months Ended
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Dec. 31, 2018
Cash and cash equivalents [abstract] |
Disclosure of detailed information about cash and cash equivalents [text block] |
|  | 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.

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