Business Segments (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Segment Reporting Information [Line Items]
External revenue	$ 5,092.0	$ 4,891.0	$ 4,697.5
Operating income (loss)	142.9	119.0	144.5
Identifiable assets	1,617.1	1,585.5	1,770.0
Acquisition of property and equipment	(145.4)	(103.3)	(100.6)
Proceeds from disposal of property and equipment	36.4	8.8	35.1
Depreciation and amortization	147.7	147.7	159.8
YRC Freight
Segment Reporting Information [Line Items]
External revenue	3,197.3	3,067.9	2,958.9
Operating income (loss)	85.0	60.7	71.8
Identifiable assets	973.6	1,042.1	1,208.7
Acquisition of property and equipment	(76.5)	(66.6)	(73.2)
Proceeds from disposal of property and equipment	35.8	8.1	31.3
Depreciation and amortization	82.2	84.8	90.3
Regional Transportation
Segment Reporting Information [Line Items]
External revenue	1,895.0	1,823.4	1,739.3
Operating income (loss)	70.7	67.9	81.3
Identifiable assets	626.4	607.4	642.9
Acquisition of property and equipment	(62.9)	(36.6)	(27.4)
Proceeds from disposal of property and equipment	0.6	0.7	3.8
Depreciation and amortization	65.0	62.9	69.5
Corporate/Eliminations
Segment Reporting Information [Line Items]
External revenue	(0.3)	(0.3)	(0.7)
Operating income (loss)	(12.8)	(9.6)	(8.6)
Identifiable assets	17.1	(64.0)	(81.6)
Acquisition of property and equipment	(6.0)	(0.1)	0.0
Proceeds from disposal of property and equipment	0.0	0.0	0.0
Depreciation and amortization	0.5	0.0	0.0
Foreign Countries
Segment Reporting Information [Line Items]
Revenues	104.1	99.3	101.0
Long-lived assets located in foreign countries	$ 6.5	$ 5.3	$ 5.2