Goodwill (Tables)

12 Months Ended

Dec. 31, 2020

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of goodwill by segment and changes during the period

Goodwill by segment and changes in goodwill is reflected in the following table (in millions):

	Transportation		Facilities		Supply and Logistics		Total
Balance at December 31, 2018	$	1,040	$	978	$	503	$	2,521
Foreign currency translation adjustments	12		4		3		19
Balance at December 31, 2019	$	1,052	$	982	$	506	$	2,540
Acquisitions	2		—		—		2
Goodwill, gross	1,054		982		506		2,542
Impairments	(1,038)		(975)		(502)		(2,515)
Foreign currency translation adjustments	(16)		(7)		(4)		(27)
Accumulated impairment losses	(1,054)		(982)		(506)		(2,542)
Balance at December 31, 2020	$	—	$	—	$	—	$	—