Inventories (Tables)

3 Months Ended

Mar. 31, 2016

Inventory Disclosure [Abstract]

Schedule of inventories

Inventories consisted of the following (in millions):

	March 31, 2016			December 31, 2015
Refinery feedstocks	$	2,574		$	2,404
Refined products and blendstocks	3,424			3,774
Ethanol feedstocks and products	264			242
Materials and supplies	249			244
Inventories, before lower of cost or market inventory valuation reserve	6,511			6,664
Lower of cost or market inventory valuation reserve	(455		)	(766		)
Inventories	$	6,056		$	5,898