Segment Information (Tables)

9 Months Ended

Sep. 30, 2015

Segment Reporting [Abstract]

Segment information for our reportable segments

The following table reflects activity related to our reportable segments (in millions):

	Refining		Ethanol		Corporate			Total
Three months ended September 30, 2015:
Operating revenues from external customers	$	21,739	$	840	$	—		$	22,579
Intersegment revenues	—		39		—			39
Operating income (loss)	2,295		35		(191		)	2,139
Three months ended September 30, 2014:
Operating revenues from external customers	33,274		1,134		—			34,408
Intersegment revenues	—		21		—			21
Operating income (loss)	1,664		198		(192		)	1,670
Nine months ended September 30, 2015:
Operating revenues from external customers	66,618		2,409		—			69,027
Intersegment revenues	—		104		—			104
Operating income (loss)	6,097		155		(540		)	5,712
Nine months ended September 30, 2014:
Operating revenues from external customers	99,183		3,802		—			102,985
Intersegment revenues	—		55		—			55
Operating income (loss)	4,023		628		(545		)	4,106

Total assets by reportable segment were as follows (in millions):

	September 30, 2015		December 31, 2014
Refining	$	38,558	$	40,103
Ethanol	959		954
Corporate	6,308		4,493
Total assets	$	45,825	$	45,550