Restructuring - Summary of Restructuring Activities (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Restructuring Reserve [Roll Forward]
Beginning Balance	$ 20.7	$ 32.0
Restructuring related costs	19.7	17.1	$ 59.6
Paid during the period	(30.8)	(28.5)
Ending Balance	9.5	20.7	32.0
Corporate
Restructuring Reserve [Roll Forward]
Beginning Balance	4.0	5.0
Restructuring related costs	13.0	4.5
Paid during the period	(16.8)	(5.5)
Ending Balance	0.2	4.0	5.0
Aviation segment | Operating Segments
Restructuring Reserve [Roll Forward]
Beginning Balance	1.4	0.7
Restructuring related costs	1.2	1.6
Paid during the period	(2.1)	(0.8)
Ending Balance	0.5	1.4	0.7
Land segment
Restructuring Reserve [Roll Forward]
Restructuring related costs	19.7	17.1	52.4
Land segment | Operating Segments
Restructuring Reserve [Roll Forward]
Beginning Balance	12.6	25.0
Restructuring related costs	4.4	6.5
Paid during the period	(9.6)	(18.9)
Ending Balance	7.5	12.6	25.0
Marine segment
Restructuring Reserve [Roll Forward]
Restructuring related costs			1.4
Marine segment | Operating Segments
Restructuring Reserve [Roll Forward]
Beginning Balance	2.6	1.3
Restructuring related costs	1.2	4.5
Paid during the period	(2.4)	(3.3)
Ending Balance	$ 1.3	$ 2.6	$ 1.3