Segment Information (Tables)

3 Months Ended

Mar. 31, 2014

Segment Information Disclosure [Abstract]

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

	Three Months Ended March 31, 2014
							Not Allocated
(In millions)	N.A. E&P		Int'l E&P		OSM		to Segments				Total
Sales and other operating revenues	$	1,392	$	1,061	$	377	$	—			$	2,830
Marketing revenues	440		69		31		—				540
Total revenues	1,832		1,130		408		—				3,370
Income from equity method investments	—		137		—		—				137
Net gain on disposal of assets and other income	3		17		2		—				22
Less:
Production expenses	211		171		231		—				613
Marketing costs	440		69		31		—				540
Exploration expenses	57		19		—		—				76
Depreciation, depletion and amortization	515		125		45		12				697
Impairments	17		—		—		—				17
Other expenses (a)	110		54		13		129			(c)	306
Taxes other than income	90		3		5		—				98
Net interest and other	—		—		—		52				52
Income tax provision (benefit)	153		512		21		(96		)		590
Segment income/Income from continuing operations	$	242	$	331	$	64	$	(97	)		$	540
Capital expenditures (b)	$	867	$	171	$	68	$	3			$	1,109

^(a)  Includes other operating expenses and general and administrative expenses.

^(b)  Includes accruals.

^(c)  Includes pension settlement loss of $63 million.

	Three Months Ended March 31, 2013
								Not Allocated
(In millions)	N.A. E&P			Int'l E&P		OSM		to Segments				Total
Sales and other operating revenues	$	1,215		$	1,801	$	388	$	(50	)	(c)	$	3,354
Marketing revenues	345			85		—		—				430
Total revenues	1,560			1,886		388		(50		)		3,784
Income from equity method investments	—			118		—		—				118
Net gain on disposal of assets and other income	—			16		—		102				118
Less:
Production expenses	184			109		271		—				564
Marketing costs	347			82		—		—				429
Exploration expenses	435			28		—		—				463
Depreciation, depletion and amortization	478			180		52		10				720
Impairments	23			—		—		15				38
Other expenses (a)	106			65		8		104				283
Taxes other than income	76			2		6		—				84
Net interest and other	—			—		—		72				72
Income tax provision (benefit)	(30		)	1,100		13		(96		)		987
Segment income/Income from continuing operations	$	(59	)	$	454	$	38	$	(53	)		$	380
Capital expenditures (b)	$	970		$	171	$	45	$	30			$	1,216

^(a)  Includes other operating expenses and general and administrative expenses.

^(b)  Includes accruals.

^(c)  Unrealized loss on crude oil derivative instruments.