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Intangible assets, airport concessions and goodwill - Net: - CGU with a significant amount of goodwill (Details)
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Colombia (Airplan)    
Disclosure by geographical areas:    
Discount rate 6.92% 9.66%
Operating costs and expenses annual average 3.00% 5.25%
Departing passenger growth rate   6.70%
Passenger growth rate in the recovery period of each CGU. 52.16%  
Recovery period (years) 3 years  
Average growth rate of passengers in the period    
After the recovery of passengers for each CGU 4.90%  
Hierarchy level of the fair value of the recoverable value of the CGU 3  
Puerto Rico (Aerostar)    
Disclosure by geographical areas:    
Discount rate 9.54% 9.60%
Operating costs and expenses annual average 3.00% 4.45%
Departing passenger growth rate   2.50%
Passenger growth rate in the recovery period of each CGU. 19.37%  
Recovery period (years) 5 years  
Average growth rate of passengers in the period    
After the recovery of passengers for each CGU 1.70%  
Hierarchy level of the fair value of the recoverable value of the CGU 3  
Mexico    
Disclosure by geographical areas:    
Discount rate 12.20%  
Operating costs and expenses annual average 3.00%  
Passenger growth rate in the recovery period of each CGU. 34.80%  
Recovery period (years) 5 years  
Average growth rate of passengers in the period    
After the recovery of passengers for each CGU 2.30%  
Hierarchy level of the fair value of the recoverable value of the CGU 3