Segment Information (Tables)

9 Months Ended

Sep. 30, 2012

Segment Reporting [Abstract]

Segment information for our reportable segments

The following table reflects activity related to continuing operations (in millions):

	Refining		Retail		Ethanol			Corporate			Total
Three months ended September 30, 2012:
Operating revenues from external   customers	$	30,543	$	3,092	$	1,091		$	—		$	34,726
Intersegment revenues	2,348		—		15			—			2,363
Operating income (loss)	1,528		41		(73		)	(187		)	1,309
Three months ended September 30, 2011:
Operating revenues from external   customers	29,177		3,053		1,483			—			33,713
Intersegment revenues	2,258		—		25			—			2,283
Operating income (loss)	1,947		97		107			(172		)	1,979
Nine Months Ended September 30, 2012:
Operating revenues from external   customers	92,181		9,089		3,285			—			104,555
Intersegment revenues	6,806		—		75			—			6,881
Operating income (loss)	2,773		253		(59		)	(541		)	2,426
Nine Months Ended September 30, 2011:
Operating revenues from external   customers	78,660		8,865		3,789			—			91,314
Intersegment revenues	6,566		—		125			—			6,691
Operating income (loss)	3,476		298		215			(476		)	3,513

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

	September 30, 2012		December 31, 2011
Refining	$	38,198	$	38,164
Retail	2,098		1,999
Ethanol	900		943
Corporate	2,596		1,677
Total assets	$	43,792	$	42,783