Consolidated Statements of Income - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Statement [Abstract]
Revenue	$ 16,648	$ 17,279	$ 15,381
Operating expenses
Cost of transportation and services	8,303	9,013	8,132
Direct operating expense	5,679	5,725	5,006
Sales, general and administrative expense	1,845	1,837	1,661
Total operating expenses	15,827	16,575	14,799
Operating income	821	704	582
Other expense (income)	(54)	(109)	(57)
Foreign currency loss	9	3	58
Debt extinguishment loss	5	27	36
Interest expense	292	217	284
Income before income tax provision (benefit)	569	566	261
Income tax provision (benefit)	129	122	(99)
Net income	440	444	360
Net income attributable to noncontrolling interests	(21)	(22)	(20)
Net income attributable to XPO	419	422	340
Earnings per share data (Note 17):
Net income attributable to common shareholders	$ 379	$ 390	$ 312
Basic earnings per share (in usd per share)	$ 3.95	$ 3.17	$ 2.72
Diluted earnings per share (in usd per share)	$ 3.57	$ 2.88	$ 2.45
Weighted-average common shares outstanding
Basic weighted-average common shares outstanding (in shares)	96	123	115
Diluted weighted-average common shares outstanding (in shares)	106	135	128