Condensed Consolidated Statements of Income (Loss) (Unaudited) - USD ($) shares in Thousands, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Income Statement [Abstract]
Revenue	$ 3,270	$ 2,675	$ 9,445	$ 7,261
Cost of transportation and services	2,306	1,814	6,545	4,919
Direct operating expense	366	310	1,058	904
Sales, general and administrative expense	339	294	1,001	915
Depreciation and amortization expense	118	119	357	351
Transaction and integration costs	15	0	26	66
Restructuring costs	14	0	16	31
Operating income	112	138	442	75
Other income	(15)	(12)	(43)	(31)
Foreign currency (gain) loss	(4)	1	(2)	(5)
Debt extinguishment loss	46	0	54	0
Interest expense	53	81	176	226
Income (loss) from continuing operations before income tax provision (benefit)	32	68	257	(115)
Income tax provision (benefit)	11	31	60	(36)
Income (loss) from continuing operations	21	37	197	(79)
Income (loss) from discontinued operations, net of taxes	(78)	61	22	68
Net income (loss)	(57)	98	219	(11)
Net loss from continuing operations attributable to noncontrolling interests	0	0	0	3
Net income from discontinued operations attributable to noncontrolling interests	0	(5)	(5)	(7)
Net income (loss) attributable to XPO	(57)	93	214	(15)
Net income (loss) attributable to common shareholders
Continuing operations, basic	21	28	197	(78)
Discontinued operations, basic	(78)	56	17	61
Net income (loss) attributable to common shares, basic	(57)	84	214	(17)
Continuing operations, diluted	21	28	197	(78)
Discontinued operations, diluted	(78)	56	17	61
Net income (loss) attributable to common shares, diluted	$ (57)	$ 84	$ 214	$ (17)
Earnings (loss) per share data
Basic earnings (loss) per share from continuing operations (in dollars per share)	$ 0.19	$ 0.30	$ 1.78	$ (0.86)
Basic earnings (loss) per share from discontinued operations (in dollars per share)	(0.69)	0.63	0.15	0.68
Basic earnings (loss) per share (in dollars per share)	(0.50)	0.93	1.93	(0.18)
Diluted earnings (loss) per share from continuing operations (in dollars per share)	0.19	0.27	1.73	(0.86)
Diluted earnings (loss) per share from discontinued operations (in dollars per share)	(0.68)	0.56	0.14	0.68
Diluted earnings (loss) per share (in dollars per share)	$ (0.49)	$ 0.83	$ 1.87	$ (0.18)
Weighted-average common shares outstanding
Basic weighted-average common shares outstanding (in shares)	115,000	91,000	111,000	91,000
Diluted weighted-average common shares (in shares)	116,000	102,000	114,000	91,000