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Leases - Fleet and spare engines (Details)
1 Months Ended 12 Months Ended
May 12, 2020
engine
Aug. 16, 2013
engine
Oct. 31, 2021
engine
Feb. 28, 2021
engine
Nov. 30, 2015
engine
Dec. 31, 2021
engine
aircraft
Dec. 31, 2021
aircraft
engine
Dec. 31, 2021
aircraft
agreement
engine
Dec. 31, 2020
engine
aircraft
Dec. 31, 2019
agreement
aircraft
Dec. 31, 2011
aircraft
Leases                      
Number of aircraft leased           100 100 100 85    
Number of spare engines leased | engine           20 20 20 18    
Number of aircraft incorporated to fleet             15   7 7  
Number of aircraft with lease term extended     1     3   15   1  
Number of spare engines purchased | engine 11   1   3            
Airbus purchase agreement                      
Leases                      
Number of aircraft purchased             15   7    
Number of aircrafts purchased directly from lessor             10        
Number of aircraft incorporated to fleet             7        
Number of aircraft returned to respective lessors             3        
Number of aircraft with lease term extended             2        
Sale and Leaseback Transactions                      
Leases                      
Number of aircraft with lease term extended | engine       2              
Pratt and Whitney purchase agreement (FMP)                      
Leases                      
Number of NEO spare engines incorporated to fleet | engine           2          
Number of CEO spare engines incorporated to fleet | engine           2          
Number of aircraft spare engines to be leased | engine           4          
A319 Model 132                      
Leases                      
Number of aircraft leased           3 3 3 3    
A319 Model 133                      
Leases                      
Number of aircraft leased           2 2 2 2    
A320 Model 233                      
Leases                      
Number of aircraft leased           39 39 39 39    
A320 Model 232                      
Leases                      
Number of aircraft leased           1 1 1 1    
A320NEO Model 271N                      
Leases                      
Number of aircraft leased           39 39 39 24    
A321 Model 231                      
Leases                      
Number of aircraft leased           10 10 10 10    
A321NEO Model 271N                      
Leases                      
Number of aircraft leased           6 6 6 6    
A320CEO model                      
Leases                      
Number of aircraft purchased                     14
Number of spare engines purchased | engine   1                  
A320CEO model | Airbus purchase agreement                      
Leases                      
Number of aircraft incorporated to fleet             5        
Number of aircraft with lease term extended             13        
A319CEO Model | Airbus purchase agreement                      
Leases                      
Number of aircraft with lease term extended             2        
V2500 Model V2524-A5                      
Leases                      
Number of spare engines leased | engine           2 2 2 2    
V2500 Model V2527M-A5                      
Leases                      
Number of spare engines leased | engine           3 3 3 3    
V2500 Model V2527E-A5                      
Leases                      
Number of spare engines leased | engine           5 5 5 5    
V2500 Model V2527-A5                      
Leases                      
Number of spare engines leased | engine           4 4 4 2    
PW1100 Model PW1127G-JM                      
Leases                      
Number of spare engines leased | engine           5 5 5 5    
PW1100 Model PW1133G-JM engine                      
Leases                      
Number of spare engines leased | engine           1 1 1 1