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Leases - Additional Information (Detail)
$ in Millions
 12 Months Ended 87 Months Ended
Dec. 31, 2023
USD ($)
aircraft
Dec. 31, 2022
USD ($)
aircraft
Dec. 31, 2021
USD ($)
Aug. 31, 2022
aircraft
Disclosure of finance and operating lease by lessee [Line Items]        
Average duration of long-term lease agreement 13 years      
Lease liabilities including provision of dismantling amounts $ 310.8 $ 266.4    
Cash outflow for leases $ 92.2 $ 85.6    
Weighted average incremental borrowing rate 4.60% 3.60%    
Total lease income amounts   $ 1.7 $ 3.0  
B-737 Max 9        
Disclosure of finance and operating lease by lessee [Line Items]        
Number of new aircrafts leased | aircraft 1 3    
Lease term 8 years      
B-737-700        
Disclosure of finance and operating lease by lessee [Line Items]        
Number of new aircrafts leased | aircraft       2