Business Segments (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Segment Reporting Information [Line Items]
Identifiable assets	$ 1,608.7		$ 1,585.5
External revenue	1,214.5	$ 1,170.6
Operating income (loss)	(4.3)	0.3
Operating Segments \| YRC Freight
Segment Reporting Information [Line Items]
Identifiable assets	993.8		1,042.1
External revenue	751.3	728.9
Operating income (loss)	(6.9)	(7.5)
Operating Segments \| Regional Transportation
Segment Reporting Information [Line Items]
Identifiable assets	628.6		607.4
External revenue	463.3	441.8
Operating income (loss)	5.2	12.2
Corporate/ Eliminations
Segment Reporting Information [Line Items]
Identifiable assets	(13.7)		$ (64.0)
External revenue	(0.1)	(0.1)
Operating income (loss)	$ (2.6)	$ (4.4)

Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(12))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(11))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1(d))
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

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