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Leases - Carrying amounts of right-of use assets (Details)
$ in Thousands, $ in Thousands
 12 Months Ended
Dec. 31, 2021
USD ($)
Dec. 31, 2021
MXN ($)
Dec. 31, 2020
MXN ($)
Dec. 31, 2019
MXN ($)
Disclosure of quantitative information about right-of-use assets [line items]        
Balance at the beginning   $ 34,316,217 $ 34,128,766  
Additions   9,210,858 5,253,374  
Modifications   1,404,499    
Disposals   (5,536) (17,742)  
Foreign exchange effect   (5) 795  
Depreciation on right of use assets $ (265,389) (5,462,625) (5,048,976) $ (4,702,971)
Balance at the end $ 1,917,235 39,463,408 34,316,217 34,128,766
Finance pre-delivery payments of aircraft        
Disclosure of quantitative information about right-of-use assets [line items]        
Balance at the beginning   33,406,490 33,312,089  
Additions   8,869,694 4,876,071  
Modifications   1,221,718    
Disposals     (17,742)  
Depreciation on right of use assets   (5,124,774) (4,763,928)  
Balance at the end   38,373,128 33,406,490 33,312,089
Aircraft Spare engines        
Disclosure of quantitative information about right-of-use assets [line items]        
Balance at the beginning   829,200 677,198  
Additions   59,374 362,081  
Modifications   42,267    
Depreciation on right of use assets   (235,732) (210,079)  
Balance at the end   695,109 829,200 677,198
Land and building leases        
Disclosure of quantitative information about right-of-use assets [line items]        
Balance at the beginning   80,527 139,479  
Additions   281,790 15,222  
Modifications   140,514    
Disposals   (5,536)    
Foreign exchange effect   (5) 795  
Depreciation on right of use assets   (102,119) (74,969)  
Balance at the end   $ 395,171 $ 80,527 $ 139,479