Condensed Consolidated Statements of Income (Loss) (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Income Statement [Abstract]
Revenue	$ 4,221	$ 4,154	$ 11,587	$ 12,512
Operating expenses
Cost of transportation and services	2,038	2,068	5,577	6,272
Direct operating expense	1,461	1,401	4,191	4,224
Sales, general and administrative expense	499	456	1,656	1,397
Total operating expenses	3,998	3,925	11,424	11,893
Operating income	223	229	163	619
Other income	(20)	(11)	(59)	(41)
Foreign currency (gain) loss	0	(5)	(5)	5
Debt extinguishment loss	0	0	0	5
Interest expense	86	75	240	218
Income (loss) before income tax provision (benefit)	157	170	(13)	432
Income tax provision (benefit)	59	34	(2)	99
Net income (loss)	98	136	(11)	333
Net income attributable to noncontrolling interests	(5)	(6)	(4)	(21)
Net income (loss) attributable to XPO	93	130	(15)	312
Earnings (loss) per share data
Net income (loss) attributable to common shareholders	$ 84	$ 117	$ (17)	$ 282
Basic (loss) earnings per share (in dollars per share)	$ 0.93	$ 1.27	$ (0.18)	$ 2.91
Diluted (loss) earnings per share (in dollars per share)	$ 0.83	$ 1.14	$ (0.18)	$ 2.63
Weighted-average common shares outstanding
Basic weighted-average common shares outstanding (in shares)	91	92	91	97
Diluted weighted-average common shares outstanding (in shares)	102	102	91	107