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Goodwill
3 Months Ended
Mar. 31, 2019
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill
Goodwill
 
Goodwill by segment and changes in goodwill are 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
5

 
2

 
1

 
8

Balance at March 31, 2019
$
1,045

 
$
980

 
$
504

 
$
2,529