Business Segments (Details) $ in Millions	3 Months Ended	9 Months Ended
Sep. 30, 2019 USD ($) segment	Sep. 30, 2018 USD ($)	Sep. 30, 2019 USD ($)	Sep. 30, 2018 USD ($)	Dec. 31, 2018 USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments \| segment	2
Identifiable assets	$ 1,917.1		$ 1,917.1		$ 1,617.1
External revenue	1,256.8	$ 1,303.6	3,711.7	$ 3,844.6
Operating income (loss)	23.8	41.2	6.4	87.8
Operating Segments \| YRC Freight
Segment Reporting Information [Line Items]
Identifiable assets	1,276.1		1,276.1		973.6
External revenue	803.2	822.1	2,347.8	2,401.0
Operating income (loss)	31.6	24.7	26.5	44.6
Operating Segments \| Regional Transportation
Segment Reporting Information [Line Items]
Identifiable assets	740.8		740.8		626.4
External revenue	453.6	481.5	1,364.0	1,443.8
Operating income (loss)	(4.1)	18.4	(8.5)	52.8
Corporate/ Eliminations
Segment Reporting Information [Line Items]
Identifiable assets	(99.8)		(99.8)		$ 17.1
External revenue	0.0	0.0	(0.1)	(0.2)
Operating income (loss)	$ (3.7)	$ (1.9)	$ (11.6)	$ (9.6)

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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