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Inventories, net (Tables)
3 Months Ended
Mar. 31, 2018
Inventory Disclosure [Abstract]  
Schedule of Inventories
Inventories, net, consisted of the following:
 
March 31,
2018
 
December 31,
2017
 
(in millions)
Fuel
$
393

 
$
387

Merchandise
30

 
30

Other
11

 
9

Inventories, net
$
434

 
$
426