Business Segments (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Segment Reporting Information [Line Items]
External revenue	$ 5,068.8us-gaap_SalesRevenueServicesNet	$ 4,865.4us-gaap_SalesRevenueServicesNet	$ 4,850.5us-gaap_SalesRevenueServicesNet
Revenues	0us-gaap_Revenues	0us-gaap_Revenues	0us-gaap_Revenues
Operating income (loss)	45.5us-gaap_OperatingIncomeLoss	28.4us-gaap_OperatingIncomeLoss	24.1us-gaap_OperatingIncomeLoss
Identifiable assets	1,985.0us-gaap_Assets	2,064.9us-gaap_Assets	2,225.5us-gaap_Assets
Acquisition of property and equipment	(69.2)	(66.9)	(66.4)
Proceeds from disposal of property and equipment	20.8	9.8	50.4
Depreciation and amortization	163.6	172.3	183.8
Equity investment impairment	0	0	30.8
YRC Freight [Member]
Segment Reporting Information [Line Items]
External revenue	3,237.4	3,136.8	3,206.9
Revenues	0	0	0
Operating income (loss)	0.5	(31.2)	(37.3)
Identifiable assets	1,462.1	1,513.4	1,315.4
Acquisition of property and equipment	(37.0)	(43.4)	(47.2)
Proceeds from disposal of property and equipment	23.2	6.7	54.1
Depreciation and amortization	98.0	109.1	119.8
Equity investment impairment			0
Regional Transportation [Member]
Segment Reporting Information [Line Items]
External revenue	1,831.4	1,728.6	1,640.4
Revenues	0	0	0.2
Operating income (loss)	66.1	79.9	70.0
Identifiable assets	685.7	698.4	745.5
Acquisition of property and equipment	(32.2)	(23.3)	(19.0)
Proceeds from disposal of property and equipment	(2.4)	3.0	(0.2)
Depreciation and amortization	65.8	63.1	63.3
Equity investment impairment			0
Corporate / Eliminations [Member]
Segment Reporting Information [Line Items]
External revenue	0	0	3.2
Revenues	0	0	(0.2)
Operating income (loss)	(21.1)	(20.3)	(8.6)
Identifiable assets	(162.8)	(146.9)	164.6
Acquisition of property and equipment	0	(0.2)	(0.2)
Proceeds from disposal of property and equipment	0	0.1	(3.5)
Depreciation and amortization	(0.2)	0.1	0.7
Equity investment impairment			30.8
Foreign Countries [Member]
Segment Reporting Information [Line Items]
Long-lived assets located in foreign countries	8.7	12.4	14.7
Revenues	$ 137.5	$ 139.5	$ 158.3

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.

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