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Operating Segments - Summary of Revenue by Category and Operating Segment (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Disclosure Of Revenue By Category [Line Items]      
Revenue $ 6,394.7 $ 5,268.5 $ 4,540.4
Aircraft [member]      
Disclosure Of Revenue By Category [Line Items]      
Revenue 4,003.0 3,300.2 2,842.1
Long-term contracts - aircraft and development [member]      
Disclosure Of Revenue By Category [Line Items]      
Revenue 661.2 457.3 312.4
Others [member]      
Disclosure Of Revenue By Category [Line Items]      
Revenue 43.5 31.1 12.0
Service [member]      
Disclosure Of Revenue By Category [Line Items]      
Revenue 1,229.2 1,021.6 932.8
Spare Parts [member]      
Disclosure Of Revenue By Category [Line Items]      
Revenue 457.8 458.3 441.1
Operating segments [member]      
Disclosure Of Revenue By Category [Line Items]      
Revenue 6,394.7 5,268.5 4,540.4
Operating segments [member] | Aircraft [member]      
Disclosure Of Revenue By Category [Line Items]      
Revenue 4,003.0 3,300.2 2,842.1
Operating segments [member] | Long-term contracts - aircraft and development [member]      
Disclosure Of Revenue By Category [Line Items]      
Revenue 661.2 457.3 312.4
Operating segments [member] | Others [member]      
Disclosure Of Revenue By Category [Line Items]      
Revenue 43.5 31.1 12.0
Operating segments [member] | Service [member]      
Disclosure Of Revenue By Category [Line Items]      
Revenue 1,229.2 1,021.6 932.8
Operating segments [member] | Spare Parts [member]      
Disclosure Of Revenue By Category [Line Items]      
Revenue 457.8 458.3 441.1
Operating segments [member] | Commercial Aviation [member]      
Disclosure Of Revenue By Category [Line Items]      
Revenue 2,208.6 1,846.8 1,543.9
Operating segments [member] | Commercial Aviation [member] | Aircraft [member]      
Disclosure Of Revenue By Category [Line Items]      
Revenue 2,199.8 1,834.1 1,540.6
Operating segments [member] | Commercial Aviation [member] | Others [member]      
Disclosure Of Revenue By Category [Line Items]      
Revenue 8.8 12.7 3.3
Operating segments [member] | Defense and Security [member]      
Disclosure Of Revenue By Category [Line Items]      
Revenue 720.9 515.4 412.6
Operating segments [member] | Defense and Security [member] | Aircraft [member]      
Disclosure Of Revenue By Category [Line Items]      
Revenue   13.2 26.0
Operating segments [member] | Defense and Security [member] | Long-term contracts - aircraft and development [member]      
Disclosure Of Revenue By Category [Line Items]      
Revenue 661.2 457.3 312.4
Operating segments [member] | Defense and Security [member] | Others [member]      
Disclosure Of Revenue By Category [Line Items]      
Revenue 16.5   6.5
Operating segments [member] | Defense and Security [member] | Service [member]      
Disclosure Of Revenue By Category [Line Items]      
Revenue 42.2 41.3 59.5
Operating segments [member] | Defense and Security [member] | Spare Parts [member]      
Disclosure Of Revenue By Category [Line Items]      
Revenue 1.0 3.6 8.2
Operating segments [member] | Executive Aviation [member]      
Disclosure Of Revenue By Category [Line Items]      
Revenue 1,762.7 1,408.2 1,244.4
Operating segments [member] | Executive Aviation [member] | Aircraft [member]      
Disclosure Of Revenue By Category [Line Items]      
Revenue 1,762.7 1,408.2 1,244.4
Operating segments [member] | Service and Support [member]      
Disclosure Of Revenue By Category [Line Items]      
Revenue 1,636.5 1,417.6 1,266.7
Operating segments [member] | Service and Support [member] | Others [member]      
Disclosure Of Revenue By Category [Line Items]      
Revenue 17.9 17.7 1.4
Operating segments [member] | Service and Support [member] | Service [member]      
Disclosure Of Revenue By Category [Line Items]      
Revenue 1,172.0 956.3 838.1
Operating segments [member] | Service and Support [member] | Spare Parts [member]      
Disclosure Of Revenue By Category [Line Items]      
Revenue 446.6 443.6 427.2
Operating segments [member] | All Other Segments [member]      
Disclosure Of Revenue By Category [Line Items]      
Revenue 66.0 80.5 72.8
Operating segments [member] | All Other Segments [member] | Aircraft [member]      
Disclosure Of Revenue By Category [Line Items]      
Revenue 40.5 44.7 31.1
Operating segments [member] | All Other Segments [member] | Others [member]      
Disclosure Of Revenue By Category [Line Items]      
Revenue 0.3 0.7 0.8
Operating segments [member] | All Other Segments [member] | Service [member]      
Disclosure Of Revenue By Category [Line Items]      
Revenue 15.0 24.0 35.2
Operating segments [member] | All Other Segments [member] | Spare Parts [member]      
Disclosure Of Revenue By Category [Line Items]      
Revenue $ 10.2 $ 11.1 $ 5.7