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Intangible assets, airport concessions and goodwill - Net: - Movements of intangible assets of airport concessions (Details) - MXN ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Intangible assets:    
Intangible assets and goodwill $ 49,126,038 $ 49,586,322
Foreign currency translation 1,321,875 (1,309,886)
Additions 1,734,398  
Additions   849,602
Intangible assets and goodwill 52,182,311 49,126,038
Accumulated amortization    
Intangible assets:    
Intangible assets and goodwill 10,395,094 8,703,731
Foreign currency translation (79,297) 33,462
Additions (1,849,871) (1,770,613)
Intangible assets and goodwill (14,061,413) 10,395,094
Concessions (Regulated Activity)    
Intangible assets:    
Intangible assets and goodwill 50,586,636 49,961,253
Foreign currency translation 1,059,370 (961,446)
Additions 107,144 591,315
Disposals transfers 932,376 995,514
Intangible assets and goodwill 52,685,526 50,586,636
Contracts assets    
Intangible assets:    
Intangible assets and goodwill 978,060 671,496
Foreign currency translation 1,295  
Additions 3,036,386 1,236,196
Disposals transfers (311,676) (929,632)
Intangible assets and goodwill 3,704,065 978,060
Contractor advance    
Intangible assets:    
Intangible assets and goodwill 696,696  
Additions 355,809 762,578
Disposals transfers (620,700) (65,882)
Intangible assets and goodwill 431,805 696,696
Licences and ODC    
Intangible assets:    
Intangible assets and goodwill 279,797 249,671
Additions 84,930 30,126
Intangible assets and goodwill 364,727 279,797
Commercial Right's (Unregulated Activity)    
Intangible assets:    
Intangible assets and goodwill 6,149,729 6,531,631
Foreign currency translation 340,507 (381,902)
Intangible assets and goodwill 6,490,236 6,149,729
Goodwill | Gross carrying amount    
Intangible assets:    
Intangible assets and goodwill 2,567,365 2,567,365
Intangible assets and goodwill $ 2,567,365 $ 2,567,365