Inventories (Tables)

12 Months Ended

Dec. 31, 2017

Inventory Disclosure [Abstract]

Schedule of inventories

Inventories consisted of the following (in millions):

	December 31,
	2017		2016
Refinery feedstocks	$	2,427	$	2,068
Refined petroleum products and blendstocks	3,459		3,153
Ethanol feedstocks and products	242		238
Materials and supplies	256		250
Inventories	$	6,384	$	5,709