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Goodwill and Other Intangible Assets - Schedule of Finite-Lived and Indefinite-Lived Intangible Assets (Details) - USD ($) $ in Millions | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Intangible assets subject to amortization: |  |
Gross Carrying Amount | $ 1,596.6 | $ 1,501.4
Accumulated Amortization | (686.1) | (616.4)
Net Carrying Amount | 910.5 | 885.0
Intangible assets not subject to amortization: |  |
Intangible assets not subject to amortization | 96.0 | 146.4
Gross intangible assets (excluding goodwill) | 1,692.6 | 1,647.8
Accumulated Amortization | (686.1) | (616.4)
Total intangible assets, net carrying amount | 1,006.5 | 1,031.4
Trade names |  |
Intangible assets not subject to amortization: |  |
Intangible assets not subject to amortization | 87.3 | 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 | 805.7 | 776.5
Accumulated Amortization | (262.9) | (222.8)
Net Carrying Amount | 542.8 | 553.7
Intangible assets not subject to amortization: |  |
Accumulated Amortization | (262.9) | (222.8)
Technology and know-how |  |
Intangible assets subject to amortization: |  |
Gross Carrying Amount | 369.6 | 343.3
Accumulated Amortization | (120.4) | (100.9)
Net Carrying Amount | 249.2 | 242.4
Intangible assets not subject to amortization: |  |
Accumulated Amortization | (120.4) | (100.9)
Trade names |  |
Intangible assets subject to amortization: |  |
Gross Carrying Amount | 107.5 | 71.3
Accumulated Amortization | (16.9) | (11.2)
Net Carrying Amount | 90.6 | 60.1
Intangible assets not subject to amortization: |  |
Accumulated Amortization | (16.9) | (11.2)
Capitalized Software |  |
Intangible assets subject to amortization: |  |
Gross Carrying Amount | 302.8 | 299.5
Accumulated Amortization | (276.1) | (272.8)
Net Carrying Amount | 26.7 | 26.7
Intangible assets not subject to amortization: |  |
Accumulated Amortization | (276.1) | (272.8)
Other |  |
Intangible assets subject to amortization: |  |
Gross Carrying Amount | 11.0 | 10.8
Accumulated Amortization | (9.8) | (8.7)
Net Carrying Amount | 1.2 | 2.1
Intangible assets not subject to amortization: |  |
Accumulated Amortization | $ (9.8) | $ (8.7)

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