Segment Reporting - Selected Financial Data for Each of Operating Segments (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Segment Reporting Information [Line Items]
Revenue	$ 3,539.5	$ 3,545.7
Operating income (loss)	113.6	62.4
Depreciation and amortization	157.4	162.1
Operating Segments | Transportation
Segment Reporting Information [Line Items]
Revenue	2,277.2	2,297.4
Operating income (loss)	100.8	75.4
Depreciation and amortization	106.2	114.6
Operating Segments | Logistics
Segment Reporting Information [Line Items]
Revenue	1,300.1	1,260.7
Operating income (loss)	47.2	31.9
Depreciation and amortization	48.7	47.1
Corporate
Segment Reporting Information [Line Items]
Revenue	0.0	0.0
Operating income (loss)	(34.4)	(44.9)
Depreciation and amortization	2.5	0.4
Eliminations
Segment Reporting Information [Line Items]
Revenue	(37.8)	(12.4)
Operating income (loss)	0.0	0.0
Depreciation and amortization	$ 0.0	$ 0.0