Inventories (Tables)

9 Months Ended

Sep. 30, 2016

Inventory Disclosure [Abstract]

Schedule of inventories

Inventories consisted of the following (in millions):

	September 30, 2016		December 31, 2015
Refinery feedstocks	$	2,244	$	2,404
Refined products and blendstocks	3,283		3,774
Ethanol feedstocks and products	202		242
Materials and supplies	250		244
Inventories, before lower of cost or market inventory valuation reserve	5,979		6,664
Lower of cost or market inventory valuation reserve	—		(766		)
Inventories	$	5,979	$	5,898