Inventories (Tables)

12 Months Ended

Dec. 31, 2015

Inventory Disclosure [Abstract]

Summary Of Inventories

	December 31,
(In millions)	2015			2014
Crude oil and refinery feedstocks	$	2,180		$	2,219
Refined products	2,804			2,955
Materials and supplies	438			302
Merchandise	173			166
Lower of cost or market reserve	(370		)	—
Total	$	5,225		$	5,642