v3.24.1.u1
Goodwill and Other Intangible Assets - Schedule of Finite-Lived and Indefinite-Lived Intangible Assets (Details) - USD ($)
$ in Millions
Mar. 31, 2024
Dec. 31, 2023
Intangible assets subject to amortization:    
Gross Carrying Amount $ 1,524.6 $ 1,501.4
Accumulated Amortization (631.9) (616.4)
Net Carrying Amount 892.7 885.0
Intangible assets not subject to amortization:    
Intangible assets not subject to amortization 97.4 146.4
Gross intangible assets (excluding goodwill) 1,622.0 1,647.8
Accumulated Amortization (631.9) (616.4)
Total intangible assets, net carrying amount 990.1 1,031.4
Trade names    
Intangible assets not subject to amortization:    
Intangible assets not subject to amortization 88.7 137.7
FAA air agency certificates    
Intangible assets not subject to amortization:    
Intangible assets not subject to amortization 8.7 8.7
Customer relationships    
Intangible assets subject to amortization:    
Gross Carrying Amount 768.1 776.5
Accumulated Amortization (232.7) (222.8)
Net Carrying Amount 535.4 553.7
Intangible assets not subject to amortization:    
Accumulated Amortization (232.7) (222.8)
Technology and know-how    
Intangible assets subject to amortization:    
Gross Carrying Amount 342.0 343.3
Accumulated Amortization (105.1) (100.9)
Net Carrying Amount 236.9 242.4
Intangible assets not subject to amortization:    
Accumulated Amortization (105.1) (100.9)
Trade names    
Intangible assets subject to amortization:    
Gross Carrying Amount 104.3 71.3
Accumulated Amortization (13.1) (11.2)
Net Carrying Amount 91.2 60.1
Intangible assets not subject to amortization:    
Accumulated Amortization (13.1) (11.2)
Capitalized software    
Intangible assets subject to amortization:    
Gross Carrying Amount 298.9 299.5
Accumulated Amortization (272.1) (272.8)
Net Carrying Amount 26.8 26.7
Intangible assets not subject to amortization:    
Accumulated Amortization (272.1) (272.8)
Other    
Intangible assets subject to amortization:    
Gross Carrying Amount 11.3 10.8
Accumulated Amortization (8.9) (8.7)
Net Carrying Amount 2.4 2.1
Intangible assets not subject to amortization:    
Accumulated Amortization $ (8.9) $ (8.7)