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Income tax incurred and deferred: Reconciliation (Details) - MXN ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2014
Income tax incurred and deferred:        
Consolidated income before IT and joint venture equity method: $ 7,661,741 $ 6,916,699 $ 8,498,889  
Consolidated income before IT and joint venture equity method: 7,661,737 6,916,699 8,386,544  
Net (loss) income before taxes of Airplan and Aerostar (843,352) (297,179) 16,011  
Net (loss) income before taxes of subsidiaries in Mexico not subject to IT (100,793) (89,685) (62,327)  
Income before provisions for income taxes $ 6,717,596 $ 6,529,835 $ 8,452,573  
Statutory IT rate 30.00% 30.00% 30.00% 30.00%
IT that would result from applying the IT rate to book profit before income taxes $ 2,015,279 $ 1,958,951 $ 2,535,772  
Non-deductible items and other permanent differences 11,941 15,126 8,693  
Gain on business combination     (2,108,760)  
Goodwill impairment     1,415,729  
Annual adjustment for tax inflation (12,783) 12,101 (2,406)  
Accounting disconnect inflation (93,030) (189,237) (249,336)  
Initial recognition for deferret IT consolidation in Aerostar 38,579 33,879 28,678  
Other non-taxable earnings   (17,742) (3,137)  
IT provision $ 1,978,102 $ 1,795,961 $ 1,635,447  
Effective IT rate 29.00% 28.00% 19.00%