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Fair value measurements - Carrying amount and fair value (Details) - MXN ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Fair value measurements    
Carrying amount of derivative financial assets $ 28,771 $ 532
Fair value of derivative financial assets 28,771 532
Fair value of financial liabilities   (9,657)
Net carrying amount (6,256,878) (5,359,737)
Net fair value (6,205,470) (5,536,457)
Transfers of assets from level 1 to level 2 0  
Transfers of assets from level 2 to level 1 0  
Financial debt    
Fair value measurements    
Carrying amount of financial liabilities (6,285,649) (5,350,612)
Fair value of financial liabilities (6,234,241) (5,527,332)
Interest-bearing loans and borrowings    
Fair value measurements    
Fair value of financial liabilities (6,234,241) (5,527,332)
Non derivative financial instruments.    
Fair value measurements    
Carrying amount of financial liabilities   (9,657)
Fair value of financial liabilities   (9,657)
Jet fuel Asian call options contracts    
Fair value measurements    
Carrying amount of derivative financial assets   206
Fair value of derivative financial assets   206
Interest rate Cap    
Fair value measurements    
Carrying amount of derivative financial assets 28,771 326
Fair value of derivative financial assets 28,771 326
Level 2    
Fair value measurements    
Fair value of financial liabilities   (9,657)
Net fair value (6,205,470) (5,536,457)
Level 2 | Interest-bearing loans and borrowings    
Fair value measurements    
Fair value of financial liabilities (6,234,241) (5,527,332)
Level 2 | Jet fuel Asian call options contracts    
Fair value measurements    
Fair value of derivative financial assets   206
Level 2 | Interest rate Cap    
Fair value measurements    
Fair value of derivative financial assets $ 28,771 $ 326