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Summary of the main accounting policies: (Details)
 12 Months Ended
Jun. 02, 2017
Dec. 31, 2017
Dec. 31, 2016
Aeropuerto de Cancun, S. A. de C. V.      
Proportion of ownership interest in subsidiary [1],[2]   100.00% 100.00%
Principal activity of business of subsidiary [1],[2]   Airport services Airport services
Aeropuerto de Cozumel, S. A. de C. V.      
Proportion of ownership interest in subsidiary   100.00% 100.00%
Principal activity of business of subsidiary   Airport services Airport services
Aeropuerto de Merida, S. A. de C. V.      
Proportion of ownership interest in subsidiary   100.00% 100.00%
Principal activity of business of subsidiary   Airport services Airport services
Aeropuerto de Huatulco, S. A. de C. V.      
Proportion of ownership interest in subsidiary   100.00% 100.00%
Principal activity of business of subsidiary   Airport services Airport services
Aeropuerto de Oaxaca, S. A. de C. V.      
Proportion of ownership interest in subsidiary   100.00% 100.00%
Principal activity of business of subsidiary   Airport services Airport services
Aeropuerto de Veracruz, S. A. de C. V.      
Proportion of ownership interest in subsidiary   100.00% 100.00%
Principal activity of business of subsidiary   Airport services Airport services
Aeropuerto de Villahermosa, S. A. de C. V.      
Proportion of ownership interest in subsidiary   100.00% 100.00%
Principal activity of business of subsidiary   Airport services Airport services
Aeropuerto de Tapachula, S. A. de C. V.      
Proportion of ownership interest in subsidiary   100.00% 100.00%
Principal activity of business of subsidiary   Airport services Airport services
Aeropuerto de Minatitlan, S. A. de C. V.      
Proportion of ownership interest in subsidiary   100.00% 100.00%
Principal activity of business of subsidiary   Airport services Airport services
Cancun Airport Services, S. A. de C. V.      
Proportion of ownership interest in subsidiary [3]   100.00% 100.00%
Principal activity of business of subsidiary [3]   Airport services Airport services
RH Asur, S. A. de C. V.      
Proportion of ownership interest in subsidiary   100.00% 100.00%
Principal activity of business of subsidiary   Administrative services Administrative services
Servicios Aeroportuarios del Sureste, S. A. de C. V.      
Proportion of ownership interest in subsidiary   100.00% 100.00%
Principal activity of business of subsidiary   Administrative services Administrative services
Asur FBO, S. A. de C. V.      
Proportion of ownership interest in subsidiary [3]   100.00% 100.00%
Principal activity of business of subsidiary [3]   Administrative services Administrative services
Caribbean Logistics, S. A. de C. V.      
Proportion of ownership interest in subsidiary [3]   100.00% 100.00%
Principal activity of business of subsidiary [3]   Cargo services Cargo services
Cargo RF, S. A. de C. V.      
Proportion of ownership interest in subsidiary [3]   100.00% 100.00%
Principal activity of business of subsidiary [3]   Cargo services Cargo services
Sociedad Operadora de Aeropuertos Centro Norte, S. A.      
Proportion of ownership interest in subsidiary [3]   92.42% 92.42%
Principal activity of business of subsidiary [3]   Airport services Airport services
Aerostar Airport Holdings, LLC      
Proportion of ownership interest in subsidiary 60.00% 60.00% [3] 60.00% [3]
Principal activity of business of subsidiary [3]   Airport services Airport services
[1] 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.
[2] 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.
[3] These subsidiaries sub-consolidate at the Cancún Airport.