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Accounts receivable - Net: Expected loss rate (Details) - MXN ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Expected loss rate:      
Accounts receivables $ 1,458,653 $ 1,195,559  
Impairment provision 346,183 191,766 $ 179,639
Mexico      
Expected loss rate:      
Accounts receivables 65,452    
Impairment provision $ 199,400 $ 128,930  
Mexico | Current      
Expected loss rate:      
Expected credit loss rate 0.00% 0.02%  
Accounts receivables $ 474,854    
Mexico | Three months      
Expected loss rate:      
Expected credit loss rate 0.02% 0.02%  
Accounts receivables $ 59,819 $ 1,012  
Impairment provision $ 784    
Mexico | Six months      
Expected loss rate:      
Expected credit loss rate 19.20% 0.02%  
Accounts receivables $ 14,292 $ 1,733  
Impairment provision $ 2,744    
Mexico | One year      
Expected loss rate:      
Expected credit loss rate 100.00% 100.00%  
Accounts receivables $ 66,816 $ 126  
Impairment provision $ 66,816    
Mexico | More than 365      
Expected loss rate:      
Expected credit loss rate 100.00% 100.00%  
Accounts receivables $ 129,056 $ 128,930  
Impairment provision 129,056 128,930  
Puerto Rico (Aerostar)      
Expected loss rate:      
Impairment provision $ 88,331 $ 37,489  
Puerto Rico (Aerostar) | Current      
Expected loss rate:      
Expected credit loss rate 5.40% 1.00%  
Accounts receivables $ 444,515 $ 159,796  
Impairment provision $ 23,984 1,599  
Puerto Rico (Aerostar) | Three months      
Expected loss rate:      
Expected credit loss rate 5.10%    
Accounts receivables $ 60,421 97,697  
Impairment provision $ 3,084 $ 3,611  
Puerto Rico (Aerostar) | Three months | Minimum      
Expected loss rate:      
Expected credit loss rate   2.50%  
Puerto Rico (Aerostar) | Three months | Maximum      
Expected loss rate:      
Expected credit loss rate   5.00%  
Puerto Rico (Aerostar) | Six months      
Expected loss rate:      
Expected credit loss rate 43.70% 15.00%  
Accounts receivables $ 3,702 $ 2,176  
Impairment provision $ 1,619 $ 544  
Puerto Rico (Aerostar) | One year      
Expected loss rate:      
Expected credit loss rate 88.00% 50.00%  
Accounts receivables $ 4,896 $ 712  
Impairment provision $ 4,284 $ 499  
Puerto Rico (Aerostar) | More than 365      
Expected loss rate:      
Expected credit loss rate 100.00% 100.00%  
Accounts receivables $ 55,360 $ 31,236  
Impairment provision 55,360 31,236  
Colombia (Airplan)      
Expected loss rate:      
Impairment provision $ 58,452 $ 25,347  
Colombia (Airplan) | Current      
Expected loss rate:      
Expected credit loss rate 0.83% 0.83%  
Colombia (Airplan) | Three months      
Expected loss rate:      
Expected credit loss rate 0.70% 0.83%  
Accounts receivables $ 73,865 $ 114,858  
Impairment provision $ 516 $ 953  
Colombia (Airplan) | Six months      
Expected loss rate:      
Expected credit loss rate 0.83% 0.83%  
Accounts receivables $ 1,610 $ 52,410  
Impairment provision $ 110 $ 435  
Colombia (Airplan) | One year      
Expected loss rate:      
Expected credit loss rate 100.00% 100.00%  
Accounts receivables $ 37,214 $ 15,357  
Impairment provision $ 25,593 $ 15,357  
Colombia (Airplan) | More than 365      
Expected loss rate:      
Expected credit loss rate 100.00% 100.00%  
Accounts receivables $ 32,233 $ 8,602  
Impairment provision $ 32,233 $ 8,602