Condensed Consolidated Statements of Changes in Equity - USD ($) shares in Thousands, $ in Millions	Total	Common Stock	Additional Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive (Loss) Income	Total XPO Stockholders' Equity	Non-controlling Interests	Series A Preferred Stock Preferred Stock
Balance at beginning of period (in shares) at Dec. 31, 2018		115,683						72
Balance at beginning of period at Dec. 31, 2018	$ 3,970	$ 0	$ 3,311	$ 377	$ (154)	$ 3,575	$ 395	$ 41
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	197			182		182	15
Other comprehensive income (loss)	(1)				1	1	(2)
Exercise and vesting of stock compensation awards (in shares)		181
Exercise and vesting of stock compensation awards	0					0
Tax withholdings related to vesting of stock compensation awards	(4)		(4)			(4)
Retirement of common stock (in shares)		(23,932)
Retirement of common stock	(1,275)		(1,275)			(1,275)
Dividend declared	(2)			(1)		(1)	(1)
Stock compensation expense	19		19			19
Adoption of new accounting standard and other (in shares)		60
Adoption of new accounting standard and other	8		3	5		8
Balance at end of period (in shares) at Jun. 30, 2019		91,992						72
Balance at end of period at Jun. 30, 2019	2,912	$ 0	2,054	563	(153)	2,505	407	$ 41
Balance at beginning of period (in shares) at Mar. 31, 2019		93,207						72
Balance at beginning of period at Mar. 31, 2019	2,833	$ 0	2,122	428	(153)	2,438	395	$ 41
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	145			135		135	10
Other comprehensive income (loss)	3				0	0	3
Exercise and vesting of stock compensation awards (in shares)		87
Exercise and vesting of stock compensation awards	0					0
Tax withholdings related to vesting of stock compensation awards	(2)		(2)			(2)
Retirement of common stock (in shares)		(1,362)
Retirement of common stock	(80)		(80)			(80)
Dividend declared	(1)					0	(1)
Stock compensation expense	11		11			11
Adoption of new accounting standard and other (in shares)		60
Adoption of new accounting standard and other	3		3			3
Balance at end of period (in shares) at Jun. 30, 2019		91,992						72
Balance at end of period at Jun. 30, 2019	2,912	$ 0	2,054	563	(153)	2,505	407	$ 41
Balance at beginning of period (in shares) at Dec. 31, 2019		92,342						72
Balance at beginning of period at Dec. 31, 2019	2,896	$ 0	2,061	786	(145)	2,743	153	$ 41
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	(109)			(108)		(108)	(1)
Other comprehensive income (loss)	(49)				(47)	(47)	(2)
Exercise and vesting of stock compensation awards (in shares)		633
Exercise and vesting of stock compensation awards	0					0
Tax withholdings related to vesting of stock compensation awards	(18)		(18)			(18)
Retirement of common stock (in shares)		(1,715)
Retirement of common stock	(114)		(114)			(114)
Dividend declared	(2)			(2)		(2)
Stock compensation expense	32		32			32
Adoption of new accounting standard and other (in shares)		62
Adoption of new accounting standard and other	(2)		2	(4)		(2)
Balance at end of period (in shares) at Jun. 30, 2020		91,322						72
Balance at end of period at Jun. 30, 2020	2,634	$ 0	1,963	672	(192)	2,484	150	$ 41
Balance at beginning of period (in shares) at Mar. 31, 2020		91,044						72
Balance at beginning of period at Mar. 31, 2020	2,728	$ 0	1,943	804	(210)	2,578	150	$ 41
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	(134)			(131)		(131)	(3)
Other comprehensive income (loss)	21				18	18	3
Exercise and vesting of stock compensation awards (in shares)		216
Exercise and vesting of stock compensation awards	0					0
Tax withholdings related to vesting of stock compensation awards	(2)		(2)			(2)
Dividend declared	(1)			(1)		(1)
Stock compensation expense	20		20			20
Adoption of new accounting standard and other (in shares)		62
Adoption of new accounting standard and other	2		2			2
Balance at end of period (in shares) at Jun. 30, 2020		91,322						72
Balance at end of period at Jun. 30, 2020	$ 2,634	$ 0	$ 1,963	$ 672	$ (192)	$ 2,484	$ 150	$ 41