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Restructuring - Summary of Restructuring Activities (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Restructuring Reserve [Roll Forward]
Restructuring charges	$ 0.0	$ 0.0	$ 5.7	$ 0.0
Restructuring, 2023 Initiative \| Employee Severance [Member]
Restructuring Reserve [Roll Forward]
Beginning balance			5.7
Restructuring charges			2.4		$ 7.2
Payments for Restructuring			(5.8)
Ending balance	2.3		2.3		5.7
Operating Segments \| Aviation Segment \| Restructuring, 2023 Initiative \| Employee Severance [Member]
Restructuring Reserve [Roll Forward]
Beginning balance			1.2
Restructuring charges			0.1
Payments for Restructuring			(1.1)
Ending balance	0.2		0.2		1.2
Operating Segments \| Land \| Restructuring, 2023 Initiative \| Employee Severance [Member]
Restructuring Reserve [Roll Forward]
Beginning balance			3.7
Restructuring charges			1.8
Payments for Restructuring			(3.8)
Ending balance	1.7		1.7		3.7
Operating Segments \| Marine \| Restructuring, 2023 Initiative \| Employee Severance [Member]
Restructuring Reserve [Roll Forward]
Beginning balance			0.0
Restructuring charges			0.0
Payments for Restructuring			0.0
Ending balance	0.0		0.0		0.0
Corporate \| Restructuring, 2023 Initiative \| Employee Severance [Member]
Restructuring Reserve [Roll Forward]
Beginning balance			0.9
Restructuring charges			0.5
Payments for Restructuring			(1.0)
Ending balance	$ 0.4		$ 0.4		$ 0.9