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Summary of the main accounting policies: (Tables) | 12 Months Ended
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Dec. 31, 2017
Significant accounting policies [Abstract] |
Company consolidated subsidiaries [text block] | The Company's consolidated subsidiaries in which it holds shares at December 31, 2016 and 2017 are as follows:
|  | Shareholding |  |  |  |
|  | percentage (%) |  |  | Main activity |
Aeropuerto de Cancún, S. A. de C. V. (*)(**) |  | 100.00 | % |  | Airport services |
Aeropuerto de Cozumel, S. A. de C. V. |  | 100.00 | % |  | Airport services |
Aeropuerto de Mérida, S. A. de C. V. |  | 100.00 | % |  | Airport services |
Aeropuerto de Huatulco, S. A. de C. V. |  | 100.00 | % |  | Airport services |
Aeropuerto de Oaxaca, S. A. de C. V. |  | 100.00 | % |  | Airport services |
Aeropuerto de Veracruz, S. A. de C. V. |  | 100.00 | % |  | Airport services |
Aeropuerto de Villahermosa, S. A. de C. V. |  | 100.00 | % |  | Airport services |
Aeropuerto de Tapachula, S. A. de C. V. |  | 100.00 | % |  | Airport services |
Aeropuerto de Minatitlán, S. A. de C. V. |  | 100.00 | % |  | Airport services |
Cancún Airport Services, S. A. de C. V. (***) |  | 100.00 | % |  | Airport services |
RH Asur, S. A. de C. V. |  | 100.00 | % |  | Administrative services |
Servicios Aeroportuarios del Sureste, S. A. de C. V. |  | 100.00 | % |  | Administrative services |
Asur FBO, S. A. de C. V. (***) |  | 100.00 | % |  | Administrative services |
Caribbean Logistics, S. A. de C. V. (***) |  | 100.00 | % |  | Cargo services |
Cargo RF, S. A. de C. V. (***) |  | 100.00 | % |  | Cargo services |
Sociedad Operadora de Aeropuertos Centro Norte, S. A. (***) |  | 92.42 | % |  | Airport services |
Aerostar Airport Holdings, LLC (***) |  | 60.00 | % |  | Airport services |
| (*) | Cancún held a 50% stake in Aerostar until May 26, 2017, which was accounted as a joint venture. See Note 9. As of May 26, 2017, the Cancún Airport acquired an additional 10% equity interest in Aerostar. As a result of this acquisition, the Company has a 60% shareholding and now controls Aerostar, therefore Aerostar is consolidated in the Company’s financial statements.
| (**) | Aeropuerto de Cancún, S. A. de C. V. acquired on October 19, 2017 a 92.42% equity interest in Sociedad Operadora de Aeropuertos Centro Norte, S. A. (Airplan), Company that holds the concession for the administration, operation, commercial exploitation, adaptation, modernization and maintenance of the Enrique Olaya Herrera in Medellín, José María Córdoba in Rionegro, El Caraño in Quibdó, Los Garzones in Montería, Antonio Roldán Betancourt in Carepa and Las Brujas in Corozal airports, and from that date Airplan’s results have been incorporated line-by-line in the Company’s and Cancún Aiport’s financial statements.
| (***) | These subsidiaries sub-consolidate at the Cancún Airport.
Description of detailed information about useful life of assets [Text Block] | The useful lives at the acquisition date of the furniture and equipment are as shown below:
|  | 2016 |  | 2017 |
Furniture equipment |  | 10% |  | 10 to 20% |
Machinery |  | 10% |  | 10 to 20% |
Computer equipment |  | 33% |  | 33 to 20% |
Transportation equipment |  | 25% |  | 20 to 25% |
Improvements to leased premises |  |  |  | 10% |
Shedule of estimated useful lives [Text Block] | The estimated useful lives at December 31, 2017 are as follows:
Licenses | 31 years
ODC | 31 years
Commercial Rights of Aerostar | 36 years
Commercial Rights of Airplan | 15 years

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