Basis of Presentation - Disaggregation of Revenue (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Revenue from External Customer [Line Items]
Revenue	$ 1,256.8	$ 1,303.6	$ 3,711.7	$ 3,844.6
LTL revenue
Revenue from External Customer [Line Items]
Revenue	1,161.0	1,199.8	3,426.8	3,539.1
Other revenue
Revenue from External Customer [Line Items]
Revenue	95.8	103.8	284.9	305.5
Operating Segments | Regional Transportation
Revenue from External Customer [Line Items]
Revenue	453.6	481.5	1,364.0	1,443.8
Operating Segments | Regional Transportation | LTL revenue
Revenue from External Customer [Line Items]
Revenue	421.6	443.7	1,264.8	1,326.3
Operating Segments | Regional Transportation | Other revenue
Revenue from External Customer [Line Items]
Revenue	32.0	37.8	99.2	117.5
Operating Segments | YRC Freight
Revenue from External Customer [Line Items]
Revenue	803.2	822.1	2,347.8	2,401.0
Operating Segments | YRC Freight | LTL revenue
Revenue from External Customer [Line Items]
Revenue	739.4	756.1	2,162.0	2,212.8
Operating Segments | YRC Freight | Other revenue
Revenue from External Customer [Line Items]
Revenue	$ 63.8	$ 66.0	$ 185.8	$ 188.2