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Summary of the main accounting policies: Consolidation (Details)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Aeropuerto de Cancun
Subsidiary
Proportion of interest in subsidiary	100.00%	100.00%
Aeropuerto de Cozumel, S. A. de C. V.
Subsidiary
Proportion of interest in subsidiary	100.00%	100.00%
Aeropuerto de Mrida, S. A. de C. V.
Subsidiary
Proportion of interest in subsidiary	100.00%	100.00%
Aeropuerto de Huatulco, S. A. de C. V.
Subsidiary
Proportion of interest in subsidiary	100.00%	100.00%
Aeropuerto de Oaxaca, S. A. de C. V.
Subsidiary
Proportion of interest in subsidiary	100.00%	100.00%
Aeropuerto de Veracruz, S. A. de C. V.
Subsidiary
Proportion of interest in subsidiary	100.00%	100.00%
Aeropuerto de Villahermosa, S. A. de C. V.
Subsidiary
Proportion of interest in subsidiary	100.00%	100.00%
Aeropuerto de Tapachula, S. A. de C. V.
Subsidiary
Proportion of interest in subsidiary	100.00%	100.00%
Aeropuerto de Minatitln, S. A. de C. V.
Subsidiary
Proportion of interest in subsidiary	100.00%	100.00%
Cancun Airport Services, S. A. de C. V.
Subsidiary
Proportion of interest in subsidiary	100.00%	100.00%
Aerostar Airport Holdings, LLC
Subsidiary
Proportion of interest in subsidiary	60.00%
Sociedad Operadora de Aeropuertos Centro Norte, S.A.
Subsidiary
Proportion of interest in subsidiary	100.00%
RH Asur, S. A. de C. V.
Subsidiary
Proportion of interest in subsidiary	100.00%	100.00%
Servicios Aeroportuarios del Sureste, S. A. de C. V.
Subsidiary
Proportion of interest in subsidiary	100.00%	100.00%
Asur FBO, S. A. de C. V.
Subsidiary
Proportion of interest in subsidiary	100.00%	100.00%
Caribbean Logistics, S. A. de C. V.
Subsidiary
Proportion of interest in subsidiary	100.00%	100.00%
Cargo RF, S. A. de C. V
Subsidiary
Proportion of interest in subsidiary	100.00%	100.00%

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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