Segment Reporting (Tables)

12 Months Ended

Dec. 31, 2017

Segment Reporting [Abstract]

Summary of Segment Reporting Information

The following tables summarize our segment information. Intersegment revenues were immaterial for all segments, with the exception of Other, which included revenues from insurance premiums charged to other segments for workers’ compensation, auto, and other types of insurance. Intersegment revenues included in Other revenues below were $78.4 million, $54.4 million and $43.4 million for the years ended December 31, 2017, 2016, and 2015 respectively.

Revenues by Segment (in millions)	Year Ended December 31,
	2017			2016			2015
Truckload	$	2,187.4		$	2,091.0		$	1,977.0
Intermodal	779.9			757.5			789.5
Logistics	834.3			737.7			638.6
Other	293.6			240.5			255.5
Fuel surcharge	386.3			294.0			371.2
Inter-segment eliminations	(97.9		)	(75.0		)	(72.4		)
Operating revenues	$	4,383.6		$	4,045.7		$	3,959.4

Income (Expense) from Operations by Segment (in millions)	Year Ended December 31,
	2017			2016			2015
Truckload	$	196.2		$	221.1		$	217.4
Intermodal	52.3			46.1			58.1
Logistics	34.2			30.7			25.4
Other	(2.4		)	(7.5		)	(40.7		)
Income (Expense) from operations	$	280.3		$	290.4		$	260.2

Depreciation and Amortization Expense by Segment (In millions)	Year Ended December 31,
	2017		2016		2015
Truckload	$	205.9	$	192.6	$	159.6
Intermodal	34.5		30.9		38.3
Logistics	0.4		0.4		0.9
Other	38.2		42.1		37.5
Depreciation and amortization expense	$	279.0	$	266.0	$	236.3