Inventories (Tables)

12 Months Ended

Dec. 31, 2018

Inventory Disclosure [Abstract]

Schedule of inventories

Inventories consisted of the following (in millions):

	December 31,
	2018		2017
Refinery feedstocks	$	2,292	$	2,427
Refined petroleum products and blendstocks	3,678		3,459
Ethanol feedstocks and products	298		242
Materials and supplies	264		256
Inventories	$	6,532	$	6,384