Restructuring Charges - Summary of Restructuring Reserve (Details) $ in Millions	3 Months Ended
	Mar. 31, 2017 USD ($)
Restructuring Reserve [Roll Forward]
Beginning balance	$ 25.2
Charges Incurred	4.6
Payments	(6.5)
Ending balance	23.3
Operating Segments | Transportation
Restructuring Reserve [Roll Forward]
Beginning balance	7.2
Charges Incurred	1.8
Payments	(2.2)
Ending balance	6.8
Operating Segments | Transportation | Facilities
Restructuring Reserve [Roll Forward]
Beginning balance	1.4
Charges Incurred	0.2
Payments	(0.2)
Ending balance	1.4
Operating Segments | Transportation | Severance
Restructuring Reserve [Roll Forward]
Beginning balance	5.8
Charges Incurred	1.6
Payments	(2.0)
Ending balance	5.4
Operating Segments | Logistics
Restructuring Reserve [Roll Forward]
Beginning balance	17.3
Charges Incurred	1.8
Payments	(3.5)
Ending balance	15.6
Operating Segments | Logistics | Facilities
Restructuring Reserve [Roll Forward]
Beginning balance	0.5
Charges Incurred	0.0
Payments	(0.2)
Ending balance	0.3
Operating Segments | Logistics | Severance
Restructuring Reserve [Roll Forward]
Beginning balance	16.1
Charges Incurred	1.8
Payments	(3.2)
Ending balance	14.7
Operating Segments | Logistics | Contract termination
Restructuring Reserve [Roll Forward]
Beginning balance	0.7
Charges Incurred	0.0
Payments	(0.1)
Ending balance	0.6
Corporate
Restructuring Reserve [Roll Forward]
Beginning balance	0.7
Charges Incurred	1.0
Payments	(0.8)
Ending balance	0.9
Corporate | Severance
Restructuring Reserve [Roll Forward]
Beginning balance	0.4
Charges Incurred	1.0
Payments	(0.6)
Ending balance	0.8
Corporate | Contract termination
Restructuring Reserve [Roll Forward]
Beginning balance	0.3
Charges Incurred	0.0
Payments	(0.2)
Ending balance	$ 0.1