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Intangible assets, airport concessions and goodwill - Net: - Additional information (Details)
$ in Thousands, $ in Thousands
 12 Months Ended
Dec. 31, 2020
USD ($)
Dec. 31, 2020
MXN ($)
Dec. 31, 2019
MXN ($)
Dec. 31, 2018
MXN ($)
Dec. 31, 2020
MXN ($)
Disclosure by geographical areas:          
Amortisation expense   $ 1,820,239 $ 1,750,239 $ 1,694,252  
Amortization commercial rights   $ 181,545 $ 172,020 179,199  
Explanation of value assigned to key assumption Taking the base scenario and applying a sensitivity analysis to the discount rate by +1% or -1% in each CGU, cash flow projections would have generated an effect of an excess of Ps.8,375,900 and Ps.18,213,261, respectively in Mexico, $563,239 and Ps.4,995,314 in Aerostar, respectively, and Ps.1,273,721 and Ps.1,857,402 in Airplan, respectively. Taking the base scenario and applying a sensitivity analysis to the discount rate by +1% or -1% in each CGU, cash flow projections would have generated an effect of an excess of Ps.8,375,900 and Ps.18,213,261, respectively in Mexico, $563,239 and Ps.4,995,314 in Aerostar, respectively, and Ps.1,273,721 and Ps.1,857,402 in Airplan, respectively.      
Impairment testing on all CGUs considering the entire value of intangible assets, airport concessions and goodwill   $ 52,182,311      
Original concession period for operating rights 50 years 50 years      
Airplan          
Disclosure by geographical areas:          
Original concession period for operating rights 40 years 40 years      
Minimum | Airplan          
Disclosure by geographical areas:          
Original concession period for operating rights 24 years 24 years      
Positive          
Disclosure by geographical areas:          
Expected probability-weighted cash flow 10.00% 10.00%      
Base          
Disclosure by geographical areas:          
Expected probability-weighted cash flow 65.00% 65.00%      
Negative          
Disclosure by geographical areas:          
Expected probability-weighted cash flow 25.00% 25.00%      
CGU Mexico          
Disclosure by geographical areas:          
Explanation of period over which management has projected cash flows P28Y P28Y      
CGU Mexico | Positive          
Disclosure by geographical areas:          
Percentage applied to passenger traffic 5.00% 5.00%      
Amount in excess of cash flow projections         $ 8,375,900
CGU Mexico | Negative          
Disclosure by geographical areas:          
Percentage applied to passenger traffic 5.00% 5.00%      
Amount in excess of cash flow projections         18,213,261
CGU Aerostar          
Disclosure by geographical areas:          
Explanation of period over which management has projected cash flows P32Y P32Y      
Explanation of value assigned to key assumption     If the discount rate applied to the cash flow projections of this CGU had been + 1% or -1% (instead of 9.60%), management's estimate would have had the following effects, an excess of the flows of cash against the carrying amount of Ps.3,937,096 and Ps.9,876,930, respectively.    
Cash payments $ 2,500        
CGU Aerostar | Positive          
Disclosure by geographical areas:          
Percentage applied to passenger traffic 10.00% 10.00%      
Amount in excess of cash flow projections $ 563,239   $ 3,937,096    
CGU Aerostar | Negative          
Disclosure by geographical areas:          
Percentage applied to passenger traffic 10.00% 10.00%      
Amount in excess of cash flow projections     9,876,930   4,995,314
CGU Airplan          
Disclosure by geographical areas:          
Period elapsed from date of execution of certificate of commencement of execution 12 years 12 years      
Explanation of value assigned to key assumption If the discount rate applied to the cash flow projections of this CGU had been + 1% or -1% (instead of 9.66)%, Management's estimate would have had the following effects, an excess of the flows of cash against the carrying amount of Ps.615,993 and Ps.1,102,280, respectively. If the discount rate applied to the cash flow projections of this CGU had been + 1% or -1% (instead of 9.66)%, Management's estimate would have had the following effects, an excess of the flows of cash against the carrying amount of Ps.615,993 and Ps.1,102,280, respectively.      
CGU Airplan | Positive          
Disclosure by geographical areas:          
Percentage applied to passenger traffic 10.00% 10.00%      
Amount in excess of cash flow projections     615,993   1,273,721
CGU Airplan | Negative          
Disclosure by geographical areas:          
Percentage applied to passenger traffic 10.00% 10.00%      
Amount in excess of cash flow projections     1,102,280   $ 1,857,402
Licences          
Disclosure by geographical areas:          
Amortisation expense   $ 29,632 20,374 22,191  
Colombia (Airplan)          
Disclosure by geographical areas:          
Amortisation expense   357,934 384,169 351,885  
Amortization commercial rights   $ 101,795 96,455 $ 100,479  
Percent of obligation to pay consideration on gross income 19.00% 19.00%   19.00%  
Puerto Rico (Aerostar)          
Disclosure by geographical areas:          
Amortisation expense   $ 492,505 433,328 $ 406,261  
Percent of obligation to pay consideration on gross income       5.00%  
Mexico          
Disclosure by geographical areas:          
Amortisation expense   $ 686,460 $ 664,267 $ 656,428