Earnings (Loss) Per Share - Schedule of Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Basic earnings (loss) per common share
Net income (loss) attributable to XPO	$ 21.3	$ (22.5)
Cumulative preferred dividends	(0.7)	(0.7)
Non-cash allocation of undistributed earnings	(1.1)	0.0
Net income (loss) allocable to common shares, basic	$ 19.5	$ (23.2)
Basic weighted-average common shares (in shares)	111.4	109.6
Basic earnings (loss) per share (in dollars per share)	$ 0.18	$ (0.21)
Diluted earnings (loss) per common share
Net income (loss) allocable to common shares, basic	$ 19.5	$ (23.2)
Interest from Convertible Senior Notes	0.3	0.0
Net income (loss) allocable to common shares, diluted	$ 19.8	$ (23.2)
Basic weighted-average common shares (in shares)	111.4	109.6
Dilutive effect of non-participating stock-based awards and Convertible Senior Notes (in shares)	13.0	0.0
Diluted weighted-average common shares (in shares)	124.4	109.6
Diluted earnings (loss) per share (in dollars per share)	$ 0.16	$ (0.21)
Diluted potential common shares excluded (in shares)	10.3	0.0