Segment Information

6 Months Ended

Jun. 30, 2013

Segment Reporting [Abstract]

SEGMENT INFORMATION

10. SEGMENT INFORMATION

As discussed in Note 2, we completed the separation of our retail business on May 1, 2013. Segment activity related to our retail business prior to the separation is reflected in the retail segment results below. Motor fuel sales to CST (our former retail business), which were eliminated in consolidation prior to the separation, are reported as refining segment operating revenues from external customers after May 1, 2013.

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

	Refining		Retail		Ethanol		Corporate			Total
Three months ended June 30, 2013:
Operating revenues from external customers	$	31,564	$	979	$	1,491	$	—		$	34,034
Intersegment revenues	671		—		15		—			686
Operating income (loss)	921		39		95		(247		)	808
Three months ended June 30, 2012:
Operating revenues from external customers	30,488		3,062		1,112		—			34,662
Intersegment revenues	2,203		—		46		—			2,249
Operating income (loss)	1,364		172		5		(180		)	1,361
Six months ended June 30, 2013:
Operating revenues from external customers	61,117		3,896		2,495		—			67,508
Intersegment revenues	2,876		—		70		—			2,946
Operating income (loss)	2,133		81		109		(454		)	1,869
Six months ended June 30, 2012:
Operating revenues from external customers	61,638		5,997		2,194		—			69,829
Intersegment revenues	4,458		—		60		—			4,518
Operating income (loss)	1,245		212		14		(354		)	1,117

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

	June 30, 2013		December 31, 2012
Refining	$	40,527	$	39,490
Retail	—		2,043
Ethanol	867		929
Corporate	2,783		2,015
Total assets	$	44,177	$	44,477