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 income	52			47		47	5
Other comprehensive income (loss)	(4)				1	1	(5)
Exercise and vesting of stock compensation awards (in shares)		94
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)		(22,570)
Retirement of common stock	(1,195)		(1,195)			(1,195)
Dividend declared	(1)			(1)		(1)
Stock compensation expense	8		8			8
Adoption of new accounting standard and other	5			5		5
Balance at end of period (in shares) at Mar. 31, 2019		93,207						72
Balance at end of period at Mar. 31, 2019	2,833	$ 0	2,122	428	(153)	2,438	395	$ 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 income	25			23		23	2
Other comprehensive income (loss)	(70)				(65)	(65)	(5)
Exercise and vesting of stock compensation awards (in shares)		417
Exercise and vesting of stock compensation awards	0					0
Tax withholdings related to vesting of stock compensation awards	(16)		(16)			(16)
Retirement of common stock (in shares)		(1,715)
Retirement of common stock	(114)		(114)			(114)
Dividend declared	(1)			(1)		(1)
Stock compensation expense	12		12			12
Adoption of new accounting standard and other	(4)			(4)		(4)
Balance at end of period (in shares) at Mar. 31, 2020		91,044						72
Balance at end of period at Mar. 31, 2020	$ 2,728	$ 0	$ 1,943	$ 804	$ (210)	$ 2,578	$ 150	$ 41