Segment Information (Tables)

9 Months Ended

Sep. 30, 2013

Segment Information Disclosure [Abstract]

Schedule of Segment Reporting Information, by Segment [Table Text Block]

	Three Months Ended September 30, 2013
(In millions)	N.A. E&P		Int'l E&P		OSM		Total
Revenues:
Sales and other operating revenues	$	1,321	$	1,396	$	463	$	3,180
Marketing revenues	607		58		3		668
Segment revenues	$	1,928	$	1,454	$	466	3,848
Unrealized loss on crude oil derivative instruments							(61		)
Total revenues							$	3,787
Segment income	$	242	$	321	$	106	$	669
Income from equity method investments	—		114		—		114
Depreciation, depletion and amortization	490		179		54		723
Income tax provision	143		714		35		892
Capital expenditures	831		254		65		1,150

	Three Months Ended September 30, 2012
(In millions)	N.A. E&P		Int'l E&P		OSM		Total
Revenues:
Sales and other operating revenues	$	993	$	1,907	$	460	$	3,360
Marketing revenues	548		73		10		631
Segment revenues	$	1,541	$	1,980	$	470	3,991
Unrealized gain on crude oil derivative instruments							45
Total revenues							$	4,036
Segment income	$	107	$	405	$	66	$	578
Income from equity method investments	1		121		—		122
Depreciation, depletion and amortization	360		194		60		614
Income tax provision	66		1,219		20		1,305
Capital expenditures	1,045		229		41		1,315

	Nine Months Ended September 30, 2013
(In millions)	N.A. E&P		Int'l E&P		OSM		Total
Revenues:
Sales and other operating revenues	$	3,820	$	5,015	$	1,204	$	10,039
Marketing revenues	1,391		194		12		1,597
Segment revenues	$	5,211	$	5,209	$	1,216	11,636
Unrealized loss on crude oil derivative instruments							(61		)
Total revenues							$	11,575
Segment income	$	404	$	1,156	$	164	$	1,724
Income from equity method investments	—		309		—		309
Depreciation, depletion and amortization	1,458		575		154		2,187
Income tax provision	242		2,860		55		3,157
Capital expenditures	2,705		720		207		3,632

	Nine Months Ended September 30, 2012
(In millions)	N.A. E&P		Int'l E&P		OSM		Total
Revenues:
Sales and other operating revenues	$	2,738	$	5,383	$	1,158	$	9,279
Marketing revenues	2,019		193		25		2,237
Segment revenues	$	4,757	$	5,576	$	1,183	11,516
Unrealized gain on crude oil derivative instruments							45
Total revenues							$	11,561
Segment income	$	281	$	1,185	$	154	$	1,620
Income from equity method investments	2		258		—		260
Depreciation, depletion and amortization	964		622		159		1,745
Income tax provision	166		3,260		50		3,476
Capital expenditures	2,887		569		136		3,592

Reconciliation of Revenue from Segments to Consolidated [Table Text Block]

The following reconciles total revenues to sales and other operating revenues as reported in the consolidated statements of income:

	Three Months Ended September 30,				Nine Months Ended September 30,
(In millions)	2013		2012		2013		2012
Total revenues	$	3,787	$	4,036	$	11,575	$	11,561
Less:  Marketing revenues	668		631		1,597		2,237
Sales and other operating revenues, including related party	$	3,119	$	3,405	$	9,978	$	9,324

Reconciliation of Segment Income to Net Income [Table Text Block]

The following reconciles segment income to net income as reported in the consolidated statements of income:

	Three Months Ended September 30,						Nine Months Ended September 30,
(In millions)	2013			2012			2013			2012
Segment income	$	669		$	578		$	1,724		$	1,620
Items not allocated to segments, net of income taxes:
Corporate and other unallocated items	(61		)	(146		)	(288		)	(294		)
Unrealized gain (loss) on crude oil derivative instruments	(39		)	29			(39		)	29
Net gain (loss) on dispositions	—			(11		)	(9		)	72
Impairments	—			—			(10		)	(167		)
Net income	$	569		$	450		$	1,378		$	1,260