Newfield Exploration (NFX) 10-Q 29 Oct 14 2014 Q3 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information (USD $)	9 Months Ended
	Sep. 30, 2014	Oct. 28, 2014	Jun. 30, 2014
Document and Entity Information [Abstract]	'	'	'
Entity Registrant Name	'NEWFIELD EXPLORATION CO /DE/	'	'
Entity Central Index Key	'0000912750	'	'
Document Type	'10-Q	'	'
Document Period End Date	30-Sep-14	'	'
Amendment Flag	'false	'	'
Document Fiscal Year Focus	'2014	'	'
Document Fiscal Period Focus	'Q3	'	'
Current Fiscal Year End Date	'--12-31	'	'
Entity Well-known Seasoned Issuer	'Yes	'	'
Entity Voluntary Filers	'No	'	'
Entity Current Reporting Status	'Yes	'	'
Entity Filer Category	'Large Accelerated Filer	'	'
Entity Public Float	'	'	$5,900,000,000
Entity Common Stock, Shares Outstanding	'	137,229,465	'

Consolidated_Balance_Sheet

Consolidated Balance Sheet (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Current assets:	'	'
Cash and cash equivalents	$396	$95
Restricted cash	0	90
Accounts receivable	395	474
Inventories	38	163
Derivative assets	48	0
Deferred taxes	0	22
Other current assets	29	57
Total current assets	906	901
Oil and gas properties — full cost method ($1,438 and $1,300 were excluded from amortization at September 30, 2014 and December 31, 2013, respectively)	15,786	16,407
Less — accumulated depreciation, depletion and amortization	7,915	8,306
Total oil and gas properties, net	7,871	8,101
Other property and equipment, net	180	174
Long-term investments	26	63
Deferred taxes	0	19
Other assets	29	37
Total assets	9,068	9,321
Derivative assets	56	26
Current liabilities:	'	'
Accounts payable	65	76
Accrued liabilities	827	978
Deferred liabilities	0	90
Advances from joint owners	27	30
Asset retirement obligations	5	54
Derivative liabilities	1	62
Total current liabilities	925	1,290
Other liabilities	40	38
Derivative liabilities	0	0
Long-term debt	3,046	3,694
Asset retirement obligations	105	201
Deferred taxes	1,427	1,142
Total long-term liabilities	4,618	5,075
Commitments and contingencies (Note 12)	0	0
Stockholders' equity:	'	'
Preferred stock ($0.01 par value, 5,000,000 shares authorized; no shares issued)	0	0
Common stock ($0.01 par value, 200,000,000 shares authorized at September 30, 2014 and December 31, 2013; 137,469,404 and 136,682,631 shares issued at September 30, 2014 and December 31, 2013, respectively)	1	1
Additional paid-in capital	1,564	1,539
Treasury stock (at cost, 256,984 and 460,914 shares at September 30, 2014 and December 31, 2013, respectively)	-9	-13
Accumulated other comprehensive gain (loss)	2	2
Retained earnings	1,967	1,427
Total stockholders' equity	3,525	2,956
Total liabilities and stockholders' equity	$9,068	$9,321

Consolidated_Balance_Sheet_Par

Consolidated Balance Sheet (Parenthetical) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Millions, except Share data, unless otherwise specified
ASSETS	'	'
Property and equipment, at cost, based on the full cost method of accounting for oil and gas properties	$1,438	$1,300
Stockholders' equity:	'	'
Preferred stock, par value	$0.01	$0.01
Preferred stock, shares authorized	5,000,000	5,000,000
Preferred stock, shares issued	0	0
Common stock, par value	$0.01	$0.01
Common stock, shares authorized	200,000,000	200,000,000
Common stock, shares issued	137,469,404	136,682,631
Treasury stock, shares	256,984	460,914
Commitments and Contingencies (Note 12)	$0	$0

Consolidated_Statement_of_Oper

Consolidated Statement of Operations (USD $)	3 Months Ended		9 Months Ended
In Millions, except Per Share data, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Earnings Per Share [Abstract]	'	'	'	'
Income (Loss) from Continuing Operations, Per Basic Share	$2.04	($0.03)	$2.06	$0.57
Income (Loss) from Discontinued Operations, Net of Tax, Per Basic Share	$0	$0.08	$1.90	$0.24
Earnings (Loss) Per Share, Basic	$2.04	$0.05	$3.96	$0.81
Income (Loss) from Continuing Operations, Per Diluted Share	$2.02	($0.03)	$2.04	$0.57
Income (Loss) from Discontinued Operations, Net of Tax, Per Diluted Share	$0	$0.08	$1.88	$0.24
Earnings (Loss) Per Share, Diluted	$2.02	$0.05	$3.92	$0.81
Weighted-average number of shares outstanding for basic earnings (loss) per share	137	136	137	135
Weighted average number of shares outstanding for diluted earnings (loss) per share	138	136	138	136
Operating expenses:	'	'	'	'
Depreciation, depletion and amortization	'	'	$665	$664
Other income (expenses):	'	'	'	'
Interest expense	-51	-52	-153	-153
Interest Costs Capitalized Adjustment	13	13	39	40
Commodity derivative income (expense)	303	-99	33	-66
Other	1	1	4	5
Total other income (expenses)	266	-137	-77	-174
Income (loss) before income taxes	435	-6	445	124
Income tax provision (benefit):	'	'	'	'
Current	1	-4	1	-4
Deferred	155	2	164	51
Total income tax provision (benefit)	156	-2	165	47
Income (Loss) from Continuing Operations Attributable to Parent	279	-4	280	77
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent	-1	31	260	53
Net income (loss)	278	27	540	130
Segment, Continuing Operations [Member]	'	'	'	'
Statement [Line Items]	'	'	'	'
Oil, gas and NGL revenues	610	486	1,771	1,291
Operating expenses:	'	'	'	'
Lease operating	126	104	356	299
Production and other taxes	31	19	85	52
Depreciation, depletion and amortization	228	171	628	482
General and administrative	48	61	172	160
Other	8	0	8	0
Total operating expenses	441	355	1,249	993
Income (loss) from operations	$169	$131	$522	$298

Consolidated_Statement_of_Comp

Consolidated Statement of Comprehensive Income (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Net Income (Loss) Attributable to Parent [Abstract]	'	'	'	'
Net income (loss)	$278	$27	$540	$130
Other comprehensive income (loss):	'	'	'	'
Unrealized gain (loss) on investments, net of tax	0	0	0	3
Other Comprehensive Income (Loss), Net of Tax	0	0	0	3
Comprehensive income (loss)	$278	$27	$540	$133

Consolidated_Statement_of_Stoc

Consolidated Statement of Stockholders' Equity (USD $)	3 Months Ended	9 Months Ended
In Millions, except Share data, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2014	Dec. 31, 2013
Common Stock, Shares, Issued	137,469,404	137,469,404	136,682,631
Common Stock, Value, Issued	$1	$1	$1
Treasury Stock, Shares	-256,984	-256,984	-460,914
Treasury Stock, Value	-9	-9	-13
Additional Paid in Capital	1,564	1,564	1,539
Retained Earnings (Accumulated Deficit)	1,967	1,967	1,427
Accumulated Other Comprehensive Income (Loss), Net of Tax	2	2	2
Issuances of common stock, value	'	4	'
Stock-based compensation	'	35	'
Treasury stock, net, value	'	-10	'
BOP Stockholders' Equity Balance	'	2,956	'
Net income (loss)	278	540	'
Other Comprehensive Income (Loss), Net of Tax	0	0	'
EOP Stockholders' Equity Balance	3,525	3,525	'
Payments for Repurchase of Preferred Stock and Preference Stock	'	0	'
Common Stock	'	'	'
Issuances of common stock, shares	'	800,000	'
Issuances of common stock, value	'	0	'
Treasury Stock	'	'	'
Treasury stock, net, shares	'	-200,000	'
Treasury stock, net, value	'	4	'
Additional Paid-in Capital	'	'	'
Issuances of common stock, value	'	4	'
Stock-based compensation	'	35	'
Treasury stock, net, value	'	-14	'
Retained Earnings	'	'	'
Net income (loss)	'	$540	'

Consolidated_Statement_of_Cash

Consolidated Statement of Cash Flows (USD $)	9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013
Cash flows from operating activities:	'	'
Net income (loss)	$540	$130
Adjustments to reconcile net income (loss) to net cash provided by operating activities:	'	'
Depreciation, depletion and amortization	665	664
Deferred Income Tax Expense (Benefit), Continuing and Discontinuing Operations	308	89
Stock-based compensation	15	35
Commodity derivative income	-33	66
Cash receipts on derivative settlements, net	-106	45
Gain on sale of malaysia	-388	0
Other non-cash charges	1	7
Changes in operating assets and liabilities:	'	'
(Increase) decrease in accounts receivable	89	16
(Increase) decrease in inventories	-1	-4
(Increase) decrease in other current assets	-2	8
(Increase) decrease in other assets	1	4
Increase (decrease) in accounts payable and accrued liabilities	-20	30
Increase (decrease) in advances from joint owners	-1	10
Increase (decrease) in other liabilities	2	-5
Net cash provided by operating activities	1,070	1,095
Cash flows from investing activities:	'	'
Additions to oil and gas properties	-1,535	-1,441
Acquisitions of oil and gas properties	-21	-64
Proceeds from sales of oil and gas properties	616	25
Proceeds from Divestiture of Businesses	809	0
Additions to furniture, fixtures and equipment	-22	-25
Redemptions of investments	39	1
Net cash used in investing activities	-114	-1,504
Cash flows from financing activities:	'	'
Proceeds from borrowings under credit arrangements	2,076	2,409
Repayments of borrowings under credit arrangements	-2,725	-1,969
Debt issue costs	0	-4
Proceeds from issuances of common stock	4	1
Payments for Repurchase of Preferred Stock and Preference Stock	0	-20
Purchases of treasury stock, net	-10	-7
Net cash provided by (used in) financing activities	-655	410
Increase (decrease) in cash and cash equivalents	301	1
Cash and cash equivalents, beginning of period	95	88
Cash and cash equivalents, end of period	$396	'

Organization_and_Summary_of_Si

Organization and Summary of Significant Accounting Policies	9 Months Ended
	Sep. 30, 2014
Accounting Policies [Abstract]	'
Organization and Summary of Significant Accounting Policies	'
	Organization and Summary of Significant Accounting Policies:
	Organization and Principles of Consolidation
	We are an independent energy company engaged in the exploration, development and production of crude oil, natural gas and natural gas liquids (NGLs). Our principal areas of operation include the Mid-Continent, the Rocky Mountains and the onshore Gulf Coast regions of North America.
	Our consolidated financial statements include the accounts of Newfield Exploration Company, a Delaware corporation, and its subsidiaries. We proportionately consolidate our interests in oil and natural gas exploration and production ventures and partnerships in accordance with industry practice. All significant intercompany balances and transactions have been eliminated. Unless otherwise specified or the context otherwise requires, all references in these notes to “Newfield,” “we,” “us,” “our” or the “Company” are to Newfield Exploration Company and its subsidiaries.
	These unaudited consolidated financial statements reflect, in the opinion of our management, all adjustments, consisting only of normal and recurring adjustments, necessary to fairly state our financial position as of and results of operations for the periods presented. These financial statements have been prepared in accordance with the instructions to Form 10-Q and, therefore, do not include all disclosures required for financial statements prepared in conformity with accounting principles generally accepted in the United States of America. Interim period results are not necessarily indicative of results of operations or cash flows for a full year.
	These consolidated financial statements and notes should be read in conjunction with our audited consolidated financial statements and the notes thereto included in our Annual Report on Form 10-K for the year ended December 31, 2013.
	Discontinued Operations
	Our businesses in Malaysia and China were classified as held for sale in the second quarter of 2013. Accordingly, the results of our international operations are reflected separately as discontinued operations in the consolidated statement of operations on a line immediately after “Income (loss) from continuing operations.” See Note 3, “Discontinued Operations,” for additional disclosures, as well as information regarding the sale of our Malaysia business, which closed in February 2014. These financial statements and notes are inclusive of our international operations unless otherwise noted.
	Use of Estimates
	The preparation of financial statements in accordance with accounting principles generally accepted in the United States of America requires our management to make estimates and assumptions that affect the reported amounts of assets and liabilities; disclosure of contingent assets and liabilities at the date of the financial statements; the reported amounts of revenues and expenses during the reporting period; and the quantities and values of proved oil, natural gas and NGL reserves used in calculating depletion and assessing impairment of our oil and gas properties. Actual results could differ significantly from these estimates. Our most significant estimates are associated with the quantities of proved oil, natural gas and NGL reserves and the fair value of both our derivative positions and our stock-based compensation liability awards.
	Reclassifications
	Certain reclassifications have been made to prior years' reported amounts in order to conform to the current year presentation. These reclassifications did not impact our net income (loss), stockholders' equity or cash flows.
	Restricted Cash and Deferred Liabilities
	Restricted cash and the associated deferred liability on our consolidated balance sheet at December 31, 2013, represent a deposit received in the fourth quarter of 2013 related to the sale of our Malaysia business. Amounts were contractually restricted until the transaction closed in February 2014. See Note 3, “Discontinued Operations,” for further discussion about the close of the sale of our Malaysia business.
	Oil and Gas Properties
	We use the full cost method of accounting for our oil and gas producing activities. Under this method, all costs incurred in the acquisition, exploration and development of oil and gas properties, including salaries, benefits, interest and other internal costs directly attributable to these activities, are capitalized into cost centers that are established on a country-by-country basis. We capitalized approximately $38 million and $47 million of interest and direct internal costs during the three-month periods ended September 30, 2014 and 2013, respectively, and $158 million and $147 million during the nine-month periods ended September 30, 2014 and 2013, respectively.
	Proceeds from the sale of oil and gas properties are applied to reduce the costs in the applicable cost center unless the reduction would significantly alter the relationship between capitalized costs and proved reserves, in which case a gain or loss is recognized. During the first quarter of 2014, we recognized a gain of approximately $388 million ($249 million, after tax) on the sale of our Malaysia business, which constituted the entire full cost pool for Malaysia. See Note 3, “Discontinued Operations,” for further discussion.
	If net capitalized costs of oil and gas properties exceed the cost center ceiling, we are subject to a ceiling test writedown to the extent of such excess. If required, a ceiling test writedown reduces earnings and stockholders’ equity in the period of occurrence and, holding other factors constant, results in lower depreciation, depletion and amortization expense in future periods. We did not have a ceiling test writedown in any periods presented.
	New Accounting Requirements
	In August 2014, the FASB issued guidance regarding disclosures of uncertainties about an entity's ability to continue as a going concern. The guidance applies prospectively to all entities, requiring management to evaluate whether there are conditions or events, considered in the aggregate, that raise substantial doubt about the entity's ability to continue as a going concern and disclose certain information when substantial doubt is raised. The guidance is effective for interim and annual periods beginning on or after December 15, 2016. We do not expect adoption of this guidance to have a material impact on our financial position or results of operations.
	In June 2014, the FASB issued guidance regarding stock-based compensation awards with targets that affect vesting and that could be achieved after the requisite service period. The guidance applies on a prospective basis to awards that are granted or modified on or after the effective date. The guidance is effective for annual periods beginning after December 15, 2015, and interim periods within those annual periods. We do not expect adoption of this guidance to have a material impact on our financial position or results of operations.
	In May 2014, the FASB issued guidance regarding the accounting for revenue from contracts with customers. The guidance may be applied retrospectively or using a modified retrospective approach to adjust retained earnings. The guidance is effective for interim and annual periods beginning on or after December 15, 2016. We are currently evaluating the impact of this guidance on our financial statements.
	In April 2014, the FASB issued guidance regarding the reporting of discontinued operations. The guidance applies prospectively to new disposals and new classifications of disposal groups as held for sale after the effective date. The guidance is effective for interim and annual periods beginning on or after December 15, 2014. We do not expect adoption of this guidance to have a material impact on our financial position or results of operations.

Earnings_Per_Share

Earnings Per Share	9 Months Ended
	Sep. 30, 2014
Earnings Per Share [Abstract]	'
Earnings Per Share Text Block	'
	Earnings Per Share:
	The following is the calculation of basic and diluted weighted-average shares outstanding and earnings per share (EPS) for the indicated periods:
			Three Months Ended						Nine Months Ended
			September 30,						September 30,
			2014			2013			2014		2013
			(In millions, except per share data)
	Income (numerator):
	Income (loss) from continuing operations		$	279		$	(4	)	$	280	$	77
	Income (loss) from discontinued operations, net of tax		(1		)	31			260		53
	Net income (loss)		278			27			540		130
	Repurchase of preferred shares of subsidiary(3)		—			(20		)	—		(20		)
	Net income (loss) attributable to common shareholders		$	278		$	7		$	540	$	110
	Weighted-average shares (denominator):
	Weighted-average shares — basic		137			136			137		135
	Dilution effect of stock options and unvested restricted stock and restricted stock units outstanding at end of period(1) (2)		1			—			1		1
	Weighted-average shares — diluted		138			136			138		136
	Earnings (loss) per share:
	Basic:
	Income (loss) from continuing operations		$	2.04		$	(0.03	)	$	2.06	$	0.57
	Income (loss) from discontinued operations before preferred share repurchase		—			0.23			1.9		0.39
	Repurchase of preferred shares of subsidiary(3)		—			(0.15		)	—		(0.15		)
	Income (loss) from discontinued operations		—			0.08			1.9		0.24
	Basic earnings (loss) per share		$	2.04		$	0.05		$	3.96	$	0.81
	Diluted:
	Income (loss) from continuing operations		$	2.02		$	(0.03	)	$	2.04	$	0.57
	Income (loss) from discontinued operations before preferred share repurchase		—			0.23			1.88		0.39
	Repurchase of preferred shares of subsidiary(3)		—			(0.15		)	—		(0.15		)
	Income (loss) from discontinued operations		—			0.08			1.88		0.24
	Diluted earnings (loss) per share		$	2.02		$	0.05		$	3.92	$	0.81
	_______
	-1	Excludes 0.3 million and 1.1 million shares of unvested restricted stock or restricted stock units and stock options for the three and nine months ended September 30, 2014 and 4.1 million shares for the nine months ended September 30, 2013 because including the effect would have been anti-dilutive.
	-2	The effect of unvested restricted stock or restricted stock units and stock options has not been included in the calculation of the shares outstanding for diluted EPS for the three months ended September 30, 2013, as their effect would have been anti-dilutive. Had we recognized income from continuing operations for this period, incremental shares attributable to the assumed vesting of unvested restricted stock and restricted stock units and the assumed exercise of outstanding stock options would have increased diluted weighted-average shares outstanding by 0.7 million shares for the three months ended September 30, 2013.
	-3	The numerator includes an adjustment of $20 million related to the repurchase of preferred shares of a now wholly-owned subsidiary, which reduces net income (loss) for purposes of earnings per share for the three and nine months ended September 30, 2013. The subsidiary is part of our discontinued operations. See Note 14, “Related-Party Transactions,” for additional information.

Discontinued_Operations

Discontinued Operations	9 Months Ended
	Sep. 30, 2014
Discontinued Operations and Disposal Groups [Abstract]	'
Disposal Groups, Including Discontinued Operations, Disclosure [Text Block]	'
	Discontinued Operations:
	Malaysia Update
	In February 2014, Newfield International Holdings, Inc., a wholly-owned subsidiary of the Company, closed the stock purchase agreement to sell its Malaysia business to SapuraKencana Petroleum Berhad, a Malaysian public company, for approximately $898 million (subject to purchase price adjustments). As a result of the sale, we recorded a gain in the first quarter of 2014 of approximately $388 million ($249 million, after tax). As of the date of this report, the final post-close settlement is pending due to a dispute with the purchaser regarding certain post-closing adjustments. We have not recorded any adjustments to the sales price or the gain recognized as we believe the Company would prevail in the event of arbitration on this matter.
	China Update
	In August 2013, during the installation of the LF-7 topside facilities by a third-party contractor, a hydraulic jacking system malfunctioned, and the installation was suspended. In August 2014, the LF-7 topside facilities were installed, and we began drilling our first well. We expect to achieve first oil production in the fourth quarter of 2014 and continue to work with potential purchasers of our China business.
	Loss from discontinued operations from our China business was $2 million ($1 million, net of tax) for the three months ended September 30, 2014, and income was $8 million ($2 million, net of tax) for the nine months ended September 30, 2014. Income from discontinued operations from our China business was $9 million ($8 million, net of tax) for the three months ended September 30, 2013 and $26 million ($13 million, net of tax) for the nine months ended September 30, 2013.
	Results of Discontinued Operations
			Three Months Ended						Nine Months Ended
			September 30,						September 30,
			2014			2013			2014		2013
			(In millions)
	Oil and gas revenues(1)		$	—		$	189		$	112	$	659
	Operating expenses		2			128			83		501
	Income (loss) from discontinued operations		(2		)	61			29		158
	Other income (expense)		—			(1		)	—		(2		)
	Gain on sale of Malaysia business		—			—			388		—
	Income (loss) from discontinued operations before income taxes		(2		)	60			417		156
	Income tax provision (benefit):
	Current		(1		)	10			13		65
	Deferred		—			19			144		38
	Total income tax provision (benefit)		(1		)	29			157		103
	Income (loss) from discontinued operations, net of tax		$	(1	)	$	31		$	260	$	53
	________________
	-1	Certain payments to foreign governments made on our behalf that are part of the revenue process are recorded as a reduction of the related oil and gas revenues.
	Income Taxes
	Historically, our international effective tax rate has been approximately 37%. As a result of our December 2012 decision to repatriate earnings from our international operations, we have experienced higher international effective tax rates due to these earnings being taxed both in the U.S. and the local countries. We expect this to continue until we fully divest our international businesses. The effective tax rate for our discontinued operations for the three months ended September 30, 2014 was 63.1% and for the nine months ended September 30, 2014 was 37.8% as the majority of our income (loss) from discontinued operations resulted from the gain on the sale of our Malaysia business, which was only taxable in the U.S. The effective tax rate for our discontinued operations for the three months ended September 30, 2013 was 48.2% and for the nine months ended September 30, 2013 was 65.7%.
	Assets and Liabilities in the Consolidated Balance Sheet Attributable to Discontinued Operations
			September 30,			December 31,
			2014			2013
			(In millions)
	Current assets:
	Cash and cash equivalents		$	27		$	84
	Accounts receivable		89			200
	Inventories		14			130
	Other current assets		5			33
	Total current assets		135			447
	Noncurrent assets:
	Oil and gas properties, net of accumulated depreciation, depletion and amortization of $118 and $1,121 as of September 30, 2014 and December 31, 2013, respectively		540			989
	Deferred taxes		—			19
	Other assets		1			4
	Total noncurrent assets		541			1,012
	Total assets		$	676		$	1,459
	Current liabilities:
	Accounts payable		$	3		$	38
	Accrued liabilities		202			324
	Asset retirement obligations		—			49
	Other current liabilities		—			18
	Total current liabilities		205			429
	Noncurrent liabilities:
	Asset retirement obligations		2			86
	Deferred taxes		104			129
	Other liabilities		—			11
	Total noncurrent liabilities		106			226
	Total liabilities		$	311		$	655
	Inventories
	Substantially all of the crude oil from our international offshore operations is produced into floating production, storage and off-loading vessels (FPSOs) and “lifted” and sold periodically as barge quantities are accumulated. At December 31, 2013, the crude oil inventory from our Malaysia and China operations consisted of approximately 1.1 million barrels of crude oil valued at cost of $90 million and is included in the “Inventories” line item in the preceding table and in our consolidated balance sheet. Cost for purposes of the carrying value of oil inventory is the sum of related production costs and depletion expense. As of September 30, 2014, we had crude oil inventory of approximately 75,000 barrels valued at cost of $3 million related to our China operations. The remaining inventory is materials and supplies for use in our oil and gas operations.
	Oil and Gas Properties
	As of September 30, 2014, all of our oil and gas properties in our discontinued operations were subject to amortization. As of December 31, 2013, approximately $115 million of our Malaysia oil and gas properties in our discontinued operations were not subject to amortization.
	Asset Retirement Obligations
	During the nine months ended September 30, 2014, asset retirement obligations were reduced by $133 million as a result of the sale of our Malaysia business in February 2014.

Oil_and_Gas_Assets

Oil and Gas Assets	9 Months Ended
	Sep. 30, 2014
Oil and Gas Property [Abstract]	'
Oil and Gas Assets Text Block	'
	Oil and Gas Assets:
	Property and Equipment
	Property and equipment consisted of the following:
		September 30,			December 31,
		2014			2013
		(In millions)
	Oil and gas properties:
	Subject to amortization	$	14,348		$	15,107
	Not subject to amortization	1,438			1,300
	Gross oil and gas properties	15,786			16,407
	Accumulated depreciation, depletion and amortization	(7,915		)	(8,306		)
	Net oil and gas properties	$	7,871		$	8,101
	Other property and equipment:
	Furniture, fixtures and equipment	$	150		$	139
	Gathering systems and equipment	111			104
	Accumulated depreciation and amortization	(81		)	(69		)
	Net other property and equipment	$	180		$	174
	Oil and gas properties not subject to amortization as of September 30, 2014, consisted of the following:
		Costs Incurred In
		2014			2013			2012		2011 and Prior		Total
		(In millions)
	Acquisition costs	$	129		$	199		$	86	$	410	$	824
	Exploration costs	345			1			1		7		354
	Development costs	14			8			31		11		64
	Fee mineral interests	—			1			—		23		24
	Capitalized interest	39			53			67		13		172
	Total oil and gas properties not subject to amortization	$	527		$	262		$	185	$	464	$	1,438
	Granite Wash Asset Sale
	On September 19, 2014, we closed on the sale of our Granite Wash assets, located primarily in Texas, for approximately $588 million, subject to customary post-closing purchase price adjustments. The sale of our Granite Wash assets did not significantly alter the relationship between capitalized costs and proved reserves, and as such, all proceeds were recorded as adjustments to our domestic full cost pool with no gain or loss recognized. These consolidated financial statements include the results of our Granite Wash operations through the date of sale.

Derivative_Financial_Instrumen

Derivative Financial Instruments	9 Months Ended
	Sep. 30, 2014
Derivative Instruments and Hedges, Assets [Abstract]	'
Derivative Financial Instruments Text Block	'
	Derivative Financial Instruments:
	Commodity Derivative Instruments
	We utilize derivative strategies that consist of either a single derivative instrument or a combination of instruments to manage the variability in cash flows associated with the forecasted sale of our future domestic oil and natural gas production. While the use of derivative instruments limits the downside risk of adverse commodity price movements, their use also may limit future income from favorable commodity price movements.
	In addition to the derivative strategies outlined in our annual Report on Form 10-K for the year ended December 31, 2013, we also utilize swaptions from time to time. A swaption is an option to exercise a swap where the buyer (counterparty) of the swaption purchases the right from the seller (Newfield), but not the obligation, to enter into a fixed-price swap with the seller on a predetermined date (expiration date). The swap price is a fixed price determined at the time of the swaption contract. If the swaption is exercised, the contract will become a swap treated consistent with our other fixed-price swaps.
	Our oil and gas derivative contracts are settled based upon reported prices on the NYMEX. The estimated fair value of these contracts is based upon various factors, including closing exchange prices on the NYMEX, over-the-counter quotations, estimated volatility, non-performance risk adjustments using credit default swaps and time to maturity. The calculation of the fair value of options requires the use of an option-pricing model. See Note 8, “Fair Value Measurements.”
	At September 30, 2014, we had outstanding derivative positions as set forth in the tables below.
	Natural Gas
						NYMEX Contract Price Per MMBtu
														Collars								Estimated Fair Value Asset (Liability)
	Period and Type of Instrument		Volume in MMMBtus			Swaps (Weighted Average)				Sold Puts (Weighted Average)				Floors (Weighted Average)				Ceilings (Weighted Average)
																						(In millions)
	2014:00:00
	Fixed-price swaps		20,400			$	3.97			$	—			$	—			$	—			$	(2	)
	Collars		5,980			—				—				3.75				4.62				—
	2015:00:00
	Fixed-price swaps		49,275			4.28				—				—				—				14
	Collars		38,325			—				—				3.93				4.74				7
	Total																					$	19
	Crude Oil
						NYMEX Contract Price Per Bbl
														Collars								Estimated Fair Value
	Period and Type of Instrument		Volume in MBbls			Swaps				Sold Puts				Floors				Ceilings				Asset (Liability)
						(Weighted Average)				(Weighted Average)				(Weighted Average)				(Weighted Average)
																						(In millions)
	2014:00:00
	Fixed-price swaps		2,116			$	89.94			$	—			$	—			$	—			$	(1	)
	Fixed-price swaps with sold puts		1,472			95.16				75				—				—				7
	Collars with sold puts		552			—				75.83				90.83				102.93				1
	2015:00:00
	Fixed-price swaps		8,845			90.42				—				—				—				23
	Fixed-price swaps with sold puts		7,354			90.22				69.75				—				—				11
	Collars with sold puts		730			—				75				90				104				3
	2016:00:00
	Fixed-price swaps with sold puts		7,864			90.89				74.59				—				—				14
	Collars with sold puts		6,220			—				75				90				96.15				19
	Swaptions (1)		—			91				—				—				—				(1		)
	2017:00:00
	Fixed-price swaps with sold puts		1,180			90.63				75				—				—				2
	Collars with sold puts		2,080			—				75				90				95.59				6
	Total																					$	84
	________
	-1	During the third quarter of 2014, we sold crude oil swaption contracts that, if exercised on their expiration date in the first quarter of 2015, would hedge 732 MBbls of calendar-year 2016 production. These contracts give the counterparties the option to enter into swap contracts with us at $91.00/Bbl for calendar-year 2016.
	Additional Disclosures about Derivative Financial Instruments
	We had derivative financial instruments recorded in our consolidated balance sheet as assets (liabilities) at their respective estimated fair value, as set forth below.
			Derivative Assets																Derivative Liabilities
			Gross Fair Value				Offset in Balance Sheet				Balance Sheet Location								Gross Fair Value				Offset in Balance Sheet		Balance Sheet Location
											Current				Noncurrent										Current			Noncurrent
			(In millions)																(In millions)
	September 30, 2014
	Natural gas positions		$	23			$	(3	)		$	15			$	5			$	(4	)		$	3	$	(1	)	$	—
	Oil positions		141				(57		)		33				51				(57		)		57		—			—
	Total		$	164			$	(60	)		$	48			$	56			$	(61	)		$	60	$	(1	)	$	—
	December 31, 2013
	Natural gas positions		$	11			$	(2	)		$	—			$	9			$	(22	)		$	2	$	(20	)	$	—
	Oil positions		26				(9		)		—				17				(51		)		9		(42		)	—
	Total		$	37			$	(11	)		$	—			$	26			$	(73	)		$	11	$	(62	)	$	—
	The amount of gain (loss) recognized in “Commodity derivative income (expense)” in our consolidated statement of operations related to our derivative financial instruments follows:
			Three Months Ended								Nine Months Ended
			September 30,								September 30,
			2014				2013				2014				2013
			(In millions)
	Derivatives not designated as hedging instruments:
	Realized gain (loss) on natural gas positions		$	(2	)		$	19			$	(36	)		$	51
Realized gain (loss) on oil positions		(18		)		(12		)		(70		)		(9		)
Total realized gain (loss)		(20		)		7				(106		)		42
Unrealized gain (loss) on natural gas positions		38				(6		)		30				(24		)
Unrealized gain (loss) on oil positions		285				(100		)		109				(84		)
Total unrealized gain (loss)		323				(106		)		139				(108		)
Total		$	303			$	(99	)		$	33			$	(66	)
The use of derivative transactions involves the risk that the counterparties will be unable to meet the financial terms of such transactions. Our derivative contracts are with multiple counterparties to minimize our exposure to any individual counterparty, and we have netting arrangements with all of our counterparties that provide for offsetting payables against receivables from separate derivative instruments with that counterparty. At September 30, 2014, 10 of our 16 counterparties accounted for approximately 85% of our contracted volumes, with no single counterparty accounting for more than 15%.
A portion of our derivative instruments are with lenders under our credit facility. Our credit facility, senior notes, senior subordinated notes and substantially all of our derivative instruments contain provisions that provide for cross defaults and acceleration of those debt and derivative instruments in certain situations.

Accounts_Receivable

Accounts Receivable	9 Months Ended
	Sep. 30, 2014
Accounts Receivable, Net, Current [Abstract]	'
Accounts Receivable Text Block	'
	Accounts Receivable:
	Accounts receivable consisted of the following:
		September 30,			December 31,
		2014			2013
		(In millions)
	Revenue	$	176		$	294
	Joint interest	183			156
	Other	37			25
	Reserve for doubtful accounts	(1		)	(1		)
	Total accounts receivable	$	395		$	474

Accrued_Liabilities

Accrued Liabilities	9 Months Ended
	Sep. 30, 2014
Accrued Liabilities, Current [Abstract]	'
Accrued Liabilities Text Block	'
	Accrued Liabilities:
	Accrued liabilities consisted of the following:
		September 30,		December 31,
		2014		2013
		(In millions)
	Revenue payable	$	179	$	175
	Accrued capital costs	449		458
	Accrued lease operating expenses	27		71
	Employee incentive expense	49		64
	Accrued interest on debt	48		72
	Taxes payable	28		93
	Other	47		45
	Total accrued liabilities	$	827	$	978

Fair_Value_Measurements

Fair Value Measurements	9 Months Ended
	Sep. 30, 2014
Fair Value Disclosures [Abstract]	'
Fair Value Measurements Text Block	'
	Fair Value Measurements:
	Fair value is the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date (exit price). The authoritative guidance requires disclosure of the framework for measuring fair value and requires that fair value measurements be classified and disclosed in one of the following categories:
	Level 1:	Unadjusted quoted prices in active markets that are accessible at the measurement date for identical, unrestricted assets or liabilities. We consider active markets as those in which transactions for the assets or liabilities occur with sufficient frequency and volume to provide pricing information on an ongoing basis.
	Level 2:	Quoted prices in markets that are not active, or inputs that are observable, either directly or indirectly, for substantially the full term of the asset or liability. This category includes those derivative instruments that we value using observable market data. Substantially all of these inputs are observable in the marketplace throughout the full term of the derivative instrument, can be derived from observable data or are supported by observable levels at which transactions are executed in the marketplace. Instruments in this category include non-exchange traded derivatives such as over-the-counter commodity fixed-price swaps and certain investments.
	Level 3:	Measured based on prices or valuation models that require inputs that are both significant to the fair value measurement and less observable from objective sources (i.e., supported by little or no market activity). Level 3 instruments primarily include derivative instruments, such as commodity options (i.e., price collars, sold puts or swaptions) and other financial investments.
	•	Our valuation models for derivative contracts are primarily industry-standard models (i.e., Black-Scholes) that consider various inputs including: (a) quoted forward prices for commodities, (b) time value, (c) volatility factors, (d) counterparty credit risk and (e) current market and contractual prices for the underlying instruments.
	•	Our valuation model for the Stockholder Value Appreciation Program (SVAP) is a Monte Carlo simulation that is based on a probability model and considers various inputs including: (a) the measurement date stock price, (b) time value and (c) historical and implied volatility. See Note 11, “Stock-Based Compensation,” for a description of the SVAP.
	Financial assets and liabilities are classified based on the lowest level of input that is significant to the fair value measurement. Our assessment of the significance of a particular input to the fair value measurement requires judgment and may affect the valuation of the fair value of assets and liabilities and their placement within the fair value hierarchy.
	Recurring Fair Value Measurements
	The following table summarizes the valuation of our assets and liabilities that are measured at fair value on a recurring basis.
			Fair Value Measurement Classification
			Quoted Prices in Active Markets for Identical Assets or Liabilities (Level 1)			Significant Other Observable Inputs (Level 2)			Significant Unobservable Inputs (Level 3)				Total
			(In millions)
	As of December 31, 2013:
	Money market fund investments		$	2		$	—		$	—			$	2
	Deferred compensation plan assets		8			—			—				8
	Investments available-for-sale:
	Equity securities		8			—			—				8
	Auction rate securities		—			—			39				39
	Oil and gas derivative swap contracts		—			(28		)	—				(28		)
	Oil and gas derivative option contracts		—			—			(8		)		(8		)
	Stock-based compensation liability awards		(11		)	—			(5		)		(16		)
	Total		$	7		$	(28	)	$	26			$	5
	As of September 30, 2014:
	Money market fund investments		$	365		$	—		$	—			$	365
	Deferred compensation plan assets		9			—			—				9
	Equity securities available-for-sale		9			—			—				9
	Oil and gas derivative swap contracts		—			104			—				104
	Oil and gas derivative option contracts		—			—			(1		)		(1		)
	Stock-based compensation liability awards		(13		)	—			(7		)		(20		)
	Total		$	370		$	104		$	(8	)		$	466
	The determination of the fair values above incorporates various factors, which include not only the impact of our non-performance risk on our derivative liabilities but also the credit standing of the counterparties involved and the impact of credit enhancements (such as cash deposits, letters of credit and priority interests), if any. We utilize credit default swap values to assess the impact of non-performance risk when evaluating both our liabilities to and receivables from counterparties.
	As of December 31, 2013, we held $39 million of auction rate securities, which were classified as a Level 3 fair value measurement. During the first quarter of 2014, all auction rate securities were sold for $39 million.
	Level 3 Fair Value Measurements
	The following table sets forth a reconciliation of changes in the fair value of financial assets and liabilities classified as Level 3 in the fair value hierarchy for the indicated periods.
			Investments			Derivatives			Stock-Based Compensation				Total
			(In millions)
	Balance at January 1, 2013		$	36		$	115		$	—			$	151
	Realized or unrealized gains (losses):
	Included in earnings		—			(59		)	(8		)		(67		)
	Included in other comprehensive income (loss)		4			—			—				4
	Purchases, issuances, sales and settlements:
	Settlements		(1		)	(46		)	—				(47		)
	Transfers in to Level 3		—			—			—				—
	Transfers out of Level 3		—			—			—				—
	Balance at September 30, 2013		$	39		$	10		$	(8	)		$	41
	Change in unrealized gains or losses included in earnings relating to Level 3 instruments still held at September 30, 2013		$	—		$	(8	)	$	(8	)		$	(16	)
	Balance at January 1, 2014		$	39		$	(8	)	$	(5	)		$	26
	Realized or unrealized gains (losses) included in earnings		—			—			(42		)		(42		)
	Purchases, issuances, sales and settlements:
	Sales		(39		)	—			—				(39		)
	Settlements		—			4			40				44
	Transfers in to Level 3		—			—			—				—
	Transfers out of Level 3(1)		—			3			—				3
	Balance at September 30, 2014		$	—		$	(1	)	$	(7	)		$	(8	)
	Change in unrealized gains or losses included in earnings relating to Level 3 instruments still held at September 30, 2014		$	—		$	20		$	(3	)		$	17
	________
	-1	During the second quarter of 2014, we transferred $3 million of derivative option contracts out of the Level 3 hierarchy. The transfer was a result of our Level 3 swaptions being exercised by the counterparties as swaps on May 30, 2014.
	Qualitative Disclosures about Unobservable Inputs for Level 3 Fair Value Measurements
	Derivatives.  Our valuation models for Level 3 derivative contracts are primarily industry-standard models that consider various factors, including certain significant unobservable inputs such as (a) quoted forward prices for commodities, (b) volatility factors and (c) counterparty credit risk. The calculation of the fair value of our option contracts requires the use of an option-pricing model. The estimated future prices are compared to the strike prices fixed by our derivative contracts, and the resulting estimated future cash inflows or outflows over the contractual life are discounted to calculate the fair value. These pricing and discounting variables are sensitive to market volatility as well as changes in future price forecasts, regional price differences and interest rates. Significant increases (decreases) in the quoted forward prices for commodities generally lead to corresponding decreases (increases) in the fair value measurement of our oil and gas derivative contracts. Significant changes in the volatility factors utilized in our option-pricing model can cause significant changes in the fair value measurement of our oil and gas derivative contracts.
	The determination of the fair values of derivative instruments incorporates various factors that include not only the impact of our non-performance risk on our liabilities but also the credit standing of the counterparties involved and the impact of credit enhancements (such as cash deposits, letters of credit and priority interests). Historically, we have not experienced significant changes in the fair value of our derivative contracts resulting from changes in counterparty credit risk as the counterparties for all of our derivative transactions have an “investment grade” credit rating.
	Stock-Based Compensation. The calculation of the fair value of the SVAP liability requires the use of a probability-based Monte Carlo simulation, which includes unobservable inputs. The simulation predicts multiple scenarios of future stock returns over the performance period, which are discounted to calculate the fair value. The fair value is recognized over a service period derived from the simulation. Future stock returns and discounting variables are sensitive to market volatility. Significant increases (decreases) in the volatility factors utilized in our option-pricing model can cause significant increases (decreases) in the fair value measurement of the SVAP liability.
	Quantitative Disclosures about Unobservable Inputs for Level 3 Fair Value Measurements
		Estimated Fair Value Asset (Liability)			Quantitative Information about Level 3 Fair Value Measurements
Instrument Type					Valuation Technique		Unobservable Input	Range
		(In millions)
Oil option contracts		$	(8	)	Black-Scholes		Oil price volatility	14.54	%		—		52.12	%
							Credit risk	0.01	%		—		3.95	%
Natural gas option contracts		$	7		Black-Scholes		Natural gas price volatility	24.78	%		—		50.03	%
							Credit risk	0.01	%		—		0.64	%
SVAP		$	(7	)	Monte Carlo		Implied volatility						37	%
Fair Value of Debt
The estimated fair value of our notes, based on quoted prices in active markets (Level 1) as of the indicated dates, was as follows:
		September 30,			December 31,
		2014			2013
		(In millions)
5¾% Senior Notes due 2022		$	836		$	767
5⅝% Senior Notes due 2024		1,072			1,025
7⅛% Senior Subordinated Notes due 2018		615			624
6⅞% Senior Subordinated Notes due 2020		730			755
Any amounts outstanding under our credit arrangements as of the indicated dates are stated at cost, which approximates fair value. Please see Note 9, “Debt.”

Debt

Debt	9 Months Ended
	Sep. 30, 2014
Debt Disclosure [Abstract]	'
Debt Text Block	'
	Debt:
	Our debt consisted of the following:
		September 30,			December 31,
		2014			2013
		(In millions)
	Senior unsecured debt:
	Revolving credit facility - LIBOR based loans	$	—		$	585
	Money market lines of credit(1)	—			64
	Total credit arrangements	—			649
	5¾% Senior Notes due 2022	750			750
	5⅝% Senior Notes due 2024	1,000			1,000
	Total senior unsecured debt	1,750			2,399
	7⅛% Senior Subordinated Notes due 2018(2)	600			600
	6⅞% Senior Subordinated Notes due 2020	700			700
	Discount on notes	(4		)	(5		)
	Total long-term debt	$	3,046		$	3,694
	________
	(1) Because capacity under our credit facility was available to repay borrowings under our money market lines of credit as of the indicated dates, amounts outstanding under these obligations, if any, are classified as long-term.
	(2) In September 2014, we called for the redemption of these Notes. See Note 15, “Subsequent Events.”
	Credit Arrangements
	We have a revolving credit facility that matures in June 2018 and provides borrowing capacity of $1.4 billion. As of September 30, 2014, the largest individual loan commitment by any lender was 14% of total commitments.
	Loans under the credit facility bear interest, at our option, equal to (a) a rate per annum equal to the higher of the prime rate announced from time to time by JPMorgan Chase Bank, N.A. or the weighted average of the rates on overnight federal funds transactions with members of the Federal Reserve System during the last preceding business day plus 50 basis points, plus a margin that is based on a grid of our debt rating (75 basis points per annum at September 30, 2014) or (b) the London Interbank Offered Rate, plus a margin that is based on a grid of our debt rating (175 basis points per annum at September 30, 2014).
	Under our credit facility, we pay commitment fees on available but undrawn amounts based on a grid of our debt rating (30 basis points per annum at September 30, 2014). We incurred aggregate commitment fees under our current credit facility of approximately $1 million and $3 million for the three and nine months ended September 30, 2014, respectively, which are recorded in “Interest expense” on our consolidated statement of operations. For the three and nine months ended September 30, 2013, we incurred commitment fees under our current credit facility of approximately $1 million and $3 million, respectively.
	Our credit facility has restrictive financial covenants that include the maintenance of a ratio of total debt to book capitalization not to exceed 0.6 to 1.0 and maintenance of a ratio of earnings before gain or loss on the disposition of assets, interest expense, income taxes and noncash items (such as depreciation, depletion and amortization expense, unrealized gains and losses on commodity derivatives, ceiling test writedowns and goodwill impairments) to interest expense of at least 3.0 to 1.0. At September 30, 2014, we were in compliance with all of our debt covenants.
	As of September 30, 2014, we had no letters of credit outstanding under our credit facility. Letters of credit are subject to a fronting fee of 20 basis points and annual fees based on a grid of our debt rating (175 basis points at September 30, 2014).
	Subject to compliance with the restrictive covenants in our credit facility, at September 30, 2014, we also had a total of $195 million of available borrowing capacity under our money market lines of credit with various financial institutions, the availability of which is at the discretion of the financial institutions.
	The credit facility includes events of default relating to customary matters, including, among other things, nonpayment of principal, interest or other amounts; violation of covenants; inaccuracy of representations and warranties in any material respect; a change of control; or certain other material adverse changes in our business. Our senior notes and senior subordinated notes also contain standard events of default. If any of the foregoing defaults were to occur, our lenders under the credit facility could terminate future lending commitments, and our lenders under both the credit facility and our notes could declare the outstanding borrowings due and payable. In addition, our credit facility, senior notes, senior subordinated notes and substantially all of our derivative arrangements contain provisions that provide for cross defaults and acceleration of those debt and derivative instruments in certain situations.

Income_Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2014
Income Tax Disclosure [Abstract]	'
Income Taxes Text Block	'
	Income Taxes:
	The provision (benefit) for income taxes for continuing operations for the indicated periods was different than the amount computed using the federal statutory rate (35%) for the following reasons:
		Three Months Ended					Nine Months Ended
		September 30,					September 30,
		2014		2013			2014		2013
		(In millions)
	Amount computed using the statutory rate	$	152	$	(3	)	$	156	$	43
	Increase (decrease) in taxes resulting from:
	State and local income taxes, net of federal effect	4		1			9		4
	Total provision (benefit) for income taxes	$	156	$	(2	)	$	165	$	47
	The effective tax rates for continuing operations for the three months ended September 30, 2014 and 2013 were 35.8% and 32.9%, respectively. The effective tax rates for continuing operations for the nine months ended September 30, 2014 and 2013 were 37.0% and 38.2%, respectively. Unrealized derivative gains and losses are treated differently for income tax purposes in the various state taxing jurisdictions to which we are subject. As a result, our effective tax rate fluctuates in periods with significant commodity price volatility.
	As of September 30, 2014, we did not have a liability for uncertain tax positions, and as such, we had not accrued related interest or penalties. The tax years 2011 through 2013 remain open to examination for federal income tax purposes and by the other major taxing jurisdictions to which we are subject.

StockBased_Compensation

Stock-Based Compensation	9 Months Ended
	Sep. 30, 2014
Share-based Compensation [Abstract]	'
Stock-Based Compensation Text Block	'
	Stock-Based Compensation:
	Our stock-based compensation consisted of the following:
			Three Months Ended								Nine Months Ended
			September 30,								September 30,
			2014				2013				2014				2013
			(In millions)
	Equity awards		$	15			$	12			$	37			$	35
	Liability awards:
	Stockholder Value Appreciation Program		(12		)		8				42				8
	Cash-settled restricted stock units		5				5				21				6
	Total liability awards		(7		)		13				63				14
	Total stock-based compensation		8				25				100				49
	Capitalized in oil and gas properties		2				(7		)		(38		)		(14		)
	Net stock-based compensation expense		$	10			$	18			$	62			$	35
	As of September 30, 2014, we had approximately $96 million of total unrecognized stock-based compensation expense related to unvested stock-based compensation awards. The full amount is expected to be recognized within four years.
	Equity Awards
	Equity awards consist of service-based and performance- or market-based restricted stock units, stock options and stock purchase options under the Employee Stock Purchase Plan.
	Stock-based compensation classified as equity awards to employees and non-employee directors are currently granted under the 2011 Omnibus Stock Plan (2011 Plan). The fair value of grants is determined utilizing the Black-Scholes option-pricing model for stock options and a Monte Carlo lattice-based model for our performance- and market-based restricted stock and restricted stock units. Compensation expense for equity awards is expected to be recognized on a straight-line basis over the applicable remaining vesting periods.
	Restricted Stock. The following table provides information about restricted stock and restricted stock unit activity.
			Service-Based			Performance/			Total			Weighted- Average Grant Date Fair Value per Share
			Shares			Market-Based			Shares
						Shares
			(In thousands, except per share data)
	Non-vested shares outstanding at December 31, 2013		2,999			706			3,705			$	33.31
	Granted		382			339			721			25.24
	Forfeited		(353	)		(46	)		(399	)		26
	Vested		(1,088	)		(30	)		(1,118	)		36.61
	Non-vested shares outstanding at September 30, 2014		1,940			969			2,909			$	30.19
	Stock Options. The following table provides information about stock option activity.
			Number of Shares Underlying Options			Weighted-				Weighted-				Weighted-		Aggregate
						Average				Average				Average		Intrinsic
						Exercise				Grant Date				Remaining		Value(1)
						Price				Fair Value				Contractual Life
						per Share				per Share
			(In thousands)											(In years)		(In millions)
	Outstanding at December 31, 2013		687			$	39.68							1.9		$	—
	Granted		—			—				$	—
	Exercised		(134	)		29.32										1
	Forfeited		(236	)		40.22
	Outstanding at September 30, 2014		317			$	43.64							2.3		$	—
	Exercisable at September 30, 2014		317			$	43.64							2.3		$	—
	________
	-1	The intrinsic value of a stock option is the amount by which the market value of our common stock at the indicated date, or at the time of exercise, exceeds the exercise price of the option.
	On September 30, 2014, the last reported sales price of our common stock on the New York Stock Exchange was $37.07 per share.
	Employee Stock Purchase Plan. During the first six months of 2014, options to purchase approximately 92,000 shares of our common stock, which were issued under our employee stock purchase plan, were exercised. The weighted-average fair value of each option was $5.96 per share. The fair value of the options granted was determined using the Black-Scholes option valuation method assuming no dividends, a risk-free weighted-average interest rate of 0.09%, an expected life of six months and weighted-average volatility of 34%.
	On July 1, 2014, options to purchase approximately 59,000 shares of our common stock were issued under our employee stock purchase plan. The weighted-average fair value of each option was $10.28 per share. The fair value of the options granted was determined using the Black-Scholes option valuation method assuming no dividends, a risk-free weighted-average interest rate of 0.06%, an expected life of six months and weighted-average volatility of 30%.
	Liability Awards
	Liability awards consist of performance awards that are settled in cash instead of shares as discussed below.
	Stockholder Value Appreciation Program. In September 2013, the Compensation and Management Development Committee of the Board approved the Stockholder Value Appreciation Program (SVAP) to be administered under the 2011 Plan. The SVAP pays substantially all full-time domestic, nonexecutive employees a cash payment based on a percentage of salary upon each incremental $5 increase in our 30-calendar day average share price. Each price threshold can be reached only once during the term of the program. The SVAP's performance period lasts through December 31, 2015.
	The first price threshold that triggered a payment under the SVAP was $27.50 during the fourth quarter of 2013. The second and third price thresholds for the SVAP were $32.50 and $37.50, respectively, which were reached during the second quarter of 2014. The fourth price threshold for the SVAP of $42.50 was reached in July 2014.
	Based on the valuation of the SVAP as of September 30, 2014, the fair value of the awards was $12 million, of which $7 million has been accrued. The total expected cost was determined using a Monte Carlo simulation assuming no dividends, a risk-free weighted-average interest rate of 0.28%, a plan term of 1.25 years and an average of implied and historical stock price volatility of 34%. An additional $5 million is expected to be recognized over the remaining service period of the plan. Future changes in our stock price could cause the total cost of the plan to be significantly different than our estimates as of September 30, 2014.
	Cash-Settled Restricted Stock Units. We also have granted cash-settled restricted stock units to employees that vest over three years. The value of the awards, and the associated stock-based compensation expense, is based on the Company’s stock price at the end of each period. During the nine months ended September 30, 2014, approximately 585,000 cash-settled restricted stock units vested and settled for approximately $19 million. During the nine months ended September 30, 2013, approximately 83,000 cash-settled restricted stock units vested and settled for approximately $2 million, all of which occurred during the first quarter of 2013. During the quarter ended September 30, 2014, we granted approximately 600,000 cash-settled restricted stock units to employees. As of September 30, 2014, we had approximately 1.2 million cash-settled restricted stock units outstanding and related unrecognized stock-based compensation expense of approximately $31 million.

Commitments_and_Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 30, 2014
Commitments and Contingencies Disclosure [Abstract]	'
Commitments and Contingencies Text Block	'
	Commitments and Contingencies:
	We have been named as a defendant in a number of other lawsuits and are involved in various other disputes, all arising in the ordinary course of our business, such as (a) claims from royalty owners for disputed royalty payments, (b) commercial disputes, (c) personal injury claims and (d) property damage claims. Although the outcome of these lawsuits and disputes cannot be predicted with certainty, we do not expect these matters to have a material adverse effect on our financial position, cash flows or results of operations.

Supplemental_Cash_Flows_Inform

Supplemental Cash Flows Information	9 Months Ended
	Sep. 30, 2014
Supplemental Cash Flow Information [Abstract]	'
Supplemental Cash Flows Information Text Block	'
	Supplemental Cash Flow Information:
		Nine Months Ended
		September 30,
		2014			2013
		(In millions)
	Non-cash items excluded from the statement of cash flows:
	(Increase) decrease in receivables for property sales	$	(17	)	$	(4	)
	(Increase) decrease in receivables from sale of Malaysia business	(15		)	—
	(Increase) decrease in accrued capital expenditures	2			(55		)
	(Increase) decrease in asset retirement costs	18			(8		)
	Increase (decrease) in deferred liabilities	(90		)	—

Related_Party_Transactions

Related Party Transactions (USD $)	3 Months Ended	9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Related Party Transactions [Abstract]	'	'	'
Related Party Transaction Text Block	'	'	'
		Related-Party Transactions:
		Kevin M. Robinson, our former Vice President — Asia through February 10, 2014, and Susan G. Riggs, our current Treasurer, were minority owners of Huffco International L.L.C. (Huffco). In May 1997, before Mr. Robinson and Ms. Riggs joined the Company, we acquired from Huffco an entity now known as Newfield China, LDC, the owner of a 12% interest in a three-field unit located in Bohai Bay, offshore China. Huffco retained preferred shares of Newfield China that provided for dividend payments. During the third quarter of 2013, we purchased the outstanding preferred shares of Newfield China from Huffco for approximately $20 million, which was recorded as a charge against retained earnings.
Ownership interest percentage in Bohai Bay Unit	'	12.00%	'
Payments for Repurchase of Preferred Stock and Preference Stock	$20	$0	$20

Subsequent_Events

Subsequent Events	9 Months Ended
	Sep. 30, 2014
Subsequent Events [Abstract]	'
Subsequent Events [Text Block]	'
	Subsequent Events:
	In October 2014, we completed the redemption of our $600 million aggregate principal of 7⅛% Senior Subordinated Notes due 2018. The transaction included a premium payment of approximately $14 million.

Organization_and_Summary_of_Si1

Organization and Summary of Significant Accounting Policies (Policies)	9 Months Ended
	Sep. 30, 2014
Accounting Policies [Abstract]	'
Organization and Principles of Consolidation	'
	Organization and Principles of Consolidation
	We are an independent energy company engaged in the exploration, development and production of crude oil, natural gas and natural gas liquids (NGLs). Our principal areas of operation include the Mid-Continent, the Rocky Mountains and the onshore Gulf Coast regions of North America.
	Our consolidated financial statements include the accounts of Newfield Exploration Company, a Delaware corporation, and its subsidiaries. We proportionately consolidate our interests in oil and natural gas exploration and production ventures and partnerships in accordance with industry practice. All significant intercompany balances and transactions have been eliminated. Unless otherwise specified or the context otherwise requires, all references in these notes to “Newfield,” “we,” “us,” “our” or the “Company” are to Newfield Exploration Company and its subsidiaries.
	These unaudited consolidated financial statements reflect, in the opinion of our management, all adjustments, consisting only of normal and recurring adjustments, necessary to fairly state our financial position as of and results of operations for the periods presented. These financial statements have been prepared in accordance with the instructions to Form 10-Q and, therefore, do not include all disclosures required for financial statements prepared in conformity with accounting principles generally accepted in the United States of America. Interim period results are not necessarily indicative of results of operations or cash flows for a full year.
	These consolidated financial statements and notes should be read in conjunction with our audited consolidated financial statements and the notes thereto included in our Annual Report on Form 10-K for the year ended December 31, 2013.
Discontinued Operations, Policy [Policy Text Block]	'
	Discontinued Operations
	Our businesses in Malaysia and China were classified as held for sale in the second quarter of 2013. Accordingly, the results of our international operations are reflected separately as discontinued operations in the consolidated statement of operations on a line immediately after “Income (loss) from continuing operations.” See Note 3, “Discontinued Operations,” for additional disclosures, as well as information regarding the sale of our Malaysia business, which closed in February 2014. These financial statements and notes are inclusive of our international operations unless otherwise noted.
Use of Estimates	'
	Use of Estimates
	The preparation of financial statements in accordance with accounting principles generally accepted in the United States of America requires our management to make estimates and assumptions that affect the reported amounts of assets and liabilities; disclosure of contingent assets and liabilities at the date of the financial statements; the reported amounts of revenues and expenses during the reporting period; and the quantities and values of proved oil, natural gas and NGL reserves used in calculating depletion and assessing impairment of our oil and gas properties. Actual results could differ significantly from these estimates. Our most significant estimates are associated with the quantities of proved oil, natural gas and NGL reserves and the fair value of both our derivative positions and our stock-based compensation liability awards.
Reclassifications	'
	Reclassifications
	Certain reclassifications have been made to prior years' reported amounts in order to conform to the current year presentation. These reclassifications did not impact our net income (loss), stockholders' equity or cash flows.
Cash and Cash Equivalents, Restricted Cash and Cash Equivalents, Policy [Policy Text Block]	'
	Restricted Cash and Deferred Liabilities
	Restricted cash and the associated deferred liability on our consolidated balance sheet at December 31, 2013, represent a deposit received in the fourth quarter of 2013 related to the sale of our Malaysia business. Amounts were contractually restricted until the transaction closed in February 2014. See Note 3, “Discontinued Operations,” for further discussion about the close of the sale of our Malaysia business.
Oil and Gas Properties	'
	Oil and Gas Properties
	We use the full cost method of accounting for our oil and gas producing activities. Under this method, all costs incurred in the acquisition, exploration and development of oil and gas properties, including salaries, benefits, interest and other internal costs directly attributable to these activities, are capitalized into cost centers that are established on a country-by-country basis. We capitalized approximately $38 million and $47 million of interest and direct internal costs during the three-month periods ended September 30, 2014 and 2013, respectively, and $158 million and $147 million during the nine-month periods ended September 30, 2014 and 2013, respectively.
	Proceeds from the sale of oil and gas properties are applied to reduce the costs in the applicable cost center unless the reduction would significantly alter the relationship between capitalized costs and proved reserves, in which case a gain or loss is recognized. During the first quarter of 2014, we recognized a gain of approximately $388 million ($249 million, after tax) on the sale of our Malaysia business, which constituted the entire full cost pool for Malaysia. See Note 3, “Discontinued Operations,” for further discussion.
	If net capitalized costs of oil and gas properties exceed the cost center ceiling, we are subject to a ceiling test writedown to the extent of such excess. If required, a ceiling test writedown reduces earnings and stockholders’ equity in the period of occurrence and, holding other factors constant, results in lower depreciation, depletion and amortization expense in future periods. We did not have a ceiling test writedown in any periods presented.
New Accounting Requirements	'
	New Accounting Requirements
	In August 2014, the FASB issued guidance regarding disclosures of uncertainties about an entity's ability to continue as a going concern. The guidance applies prospectively to all entities, requiring management to evaluate whether there are conditions or events, considered in the aggregate, that raise substantial doubt about the entity's ability to continue as a going concern and disclose certain information when substantial doubt is raised. The guidance is effective for interim and annual periods beginning on or after December 15, 2016. We do not expect adoption of this guidance to have a material impact on our financial position or results of operations.
	In June 2014, the FASB issued guidance regarding stock-based compensation awards with targets that affect vesting and that could be achieved after the requisite service period. The guidance applies on a prospective basis to awards that are granted or modified on or after the effective date. The guidance is effective for annual periods beginning after December 15, 2015, and interim periods within those annual periods. We do not expect adoption of this guidance to have a material impact on our financial position or results of operations.
	In May 2014, the FASB issued guidance regarding the accounting for revenue from contracts with customers. The guidance may be applied retrospectively or using a modified retrospective approach to adjust retained earnings. The guidance is effective for interim and annual periods beginning on or after December 15, 2016. We are currently evaluating the impact of this guidance on our financial statements.
	In April 2014, the FASB issued guidance regarding the reporting of discontinued operations. The guidance applies prospectively to new disposals and new classifications of disposal groups as held for sale after the effective date. The guidance is effective for interim and annual periods beginning on or after December 15, 2014. We do not expect adoption of this guidance to have a material impact on our financial position or results of operations.

Earnings_Per_Share_Tables

Earnings Per Share (Tables)	9 Months Ended
	Sep. 30, 2014
Earnings Per Share [Abstract]	'
Earnings Per Share Table	'
	The following is the calculation of basic and diluted weighted-average shares outstanding and earnings per share (EPS) for the indicated periods:
			Three Months Ended						Nine Months Ended
			September 30,						September 30,
			2014			2013			2014		2013
			(In millions, except per share data)
	Income (numerator):
	Income (loss) from continuing operations		$	279		$	(4	)	$	280	$	77
	Income (loss) from discontinued operations, net of tax		(1		)	31			260		53
	Net income (loss)		278			27			540		130
	Repurchase of preferred shares of subsidiary(3)		—			(20		)	—		(20		)
	Net income (loss) attributable to common shareholders		$	278		$	7		$	540	$	110
	Weighted-average shares (denominator):
	Weighted-average shares — basic		137			136			137		135
	Dilution effect of stock options and unvested restricted stock and restricted stock units outstanding at end of period(1) (2)		1			—			1		1
	Weighted-average shares — diluted		138			136			138		136
	Earnings (loss) per share:
	Basic:
	Income (loss) from continuing operations		$	2.04		$	(0.03	)	$	2.06	$	0.57
	Income (loss) from discontinued operations before preferred share repurchase		—			0.23			1.9		0.39
	Repurchase of preferred shares of subsidiary(3)		—			(0.15		)	—		(0.15		)
	Income (loss) from discontinued operations		—			0.08			1.9		0.24
	Basic earnings (loss) per share		$	2.04		$	0.05		$	3.96	$	0.81
	Diluted:
	Income (loss) from continuing operations		$	2.02		$	(0.03	)	$	2.04	$	0.57
	Income (loss) from discontinued operations before preferred share repurchase		—			0.23			1.88		0.39
	Repurchase of preferred shares of subsidiary(3)		—			(0.15		)	—		(0.15		)
	Income (loss) from discontinued operations		—			0.08			1.88		0.24
	Diluted earnings (loss) per share		$	2.02		$	0.05		$	3.92	$	0.81
	_______
	-1	Excludes 0.3 million and 1.1 million shares of unvested restricted stock or restricted stock units and stock options for the three and nine months ended September 30, 2014 and 4.1 million shares for the nine months ended September 30, 2013 because including the effect would have been anti-dilutive.
	-2	The effect of unvested restricted stock or restricted stock units and stock options has not been included in the calculation of the shares outstanding for diluted EPS for the three months ended September 30, 2013, as their effect would have been anti-dilutive. Had we recognized income from continuing operations for this period, incremental shares attributable to the assumed vesting of unvested restricted stock and restricted stock units and the assumed exercise of outstanding stock options would have increased diluted weighted-average shares outstanding by 0.7 million shares for the three months ended September 30, 2013.
	-3	The numerator includes an adjustment of $20 million related to the repurchase of preferred shares of a now wholly-owned subsidiary, which reduces net income (loss) for purposes of earnings per share for the three and nine months ended September 30, 2013. The subsidiary is part of our discontinued operations. See Note 14, “Related-Party Transactions,” for additional information.

Discontinued_Operations_Tables

Discontinued Operations (Tables)	9 Months Ended
	Sep. 30, 2014
Discontinued Operations and Disposal Groups [Abstract]	'
Schedule of Disposal Groups, Including Discontinued Operations, Income Statement, Balance Sheet and Additional Disclosures [Table Text Block]	'
			Three Months Ended						Nine Months Ended
			September 30,						September 30,
			2014			2013			2014		2013
			(In millions)
	Oil and gas revenues(1)		$	—		$	189		$	112	$	659
	Operating expenses		2			128			83		501
	Income (loss) from discontinued operations		(2		)	61			29		158
	Other income (expense)		—			(1		)	—		(2		)
	Gain on sale of Malaysia business		—			—			388		—
	Income (loss) from discontinued operations before income taxes		(2		)	60			417		156
	Income tax provision (benefit):
	Current		(1		)	10			13		65
	Deferred		—			19			144		38
	Total income tax provision (benefit)		(1		)	29			157		103
	Income (loss) from discontinued operations, net of tax		$	(1	)	$	31		$	260	$	53
	________________
	-1	Certain payments to foreign governments made on our behalf that are part of the revenue process are recorded as a reduction of the related oil and gas revenues.
Schedule of Disposal Groups, Including Discontinued Operations, Balance Sheet [Table Text Block]	'
			September 30,			December 31,
			2014			2013
			(In millions)
	Current assets:
	Cash and cash equivalents		$	27		$	84
	Accounts receivable		89			200
	Inventories		14			130
	Other current assets		5			33
	Total current assets		135			447
	Noncurrent assets:
	Oil and gas properties, net of accumulated depreciation, depletion and amortization of $118 and $1,121 as of September 30, 2014 and December 31, 2013, respectively		540			989
	Deferred taxes		—			19
	Other assets		1			4
	Total noncurrent assets		541			1,012
	Total assets		$	676		$	1,459
	Current liabilities:
	Accounts payable		$	3		$	38
	Accrued liabilities		202			324
	Asset retirement obligations		—			49
	Other current liabilities		—			18
	Total current liabilities		205			429
	Noncurrent liabilities:
	Asset retirement obligations		2			86
	Deferred taxes		104			129
	Other liabilities		—			11
	Total noncurrent liabilities		106			226
	Total liabilities		$	311		$	655

Oil_and_Gas_Assets_Tables

Oil and Gas Assets (Tables)	9 Months Ended
	Sep. 30, 2014
Oil and Gas Property [Abstract]	'
Costs incurred by year for oil and gas properties not subject to amortization	'
	Oil and gas properties not subject to amortization as of September 30, 2014, consisted of the following:
		Costs Incurred In
		2014			2013			2012		2011 and Prior		Total
		(In millions)
	Acquisition costs	$	129		$	199		$	86	$	410	$	824
	Exploration costs	345			1			1		7		354
	Development costs	14			8			31		11		64
	Fee mineral interests	—			1			—		23		24
	Capitalized interest	39			53			67		13		172
	Total oil and gas properties not subject to amortization	$	527		$	262		$	185	$	464	$	1,438
Capitalized Costs Relating to Oil and Gas Producing Activities and Other PPE [Table Text Block]	'
	Property and equipment consisted of the following:
		September 30,			December 31,
		2014			2013
		(In millions)
	Oil and gas properties:
	Subject to amortization	$	14,348		$	15,107
	Not subject to amortization	1,438			1,300
	Gross oil and gas properties	15,786			16,407
	Accumulated depreciation, depletion and amortization	(7,915		)	(8,306		)
	Net oil and gas properties	$	7,871		$	8,101
	Other property and equipment:
	Furniture, fixtures and equipment	$	150		$	139
	Gathering systems and equipment	111			104
	Accumulated depreciation and amortization	(81		)	(69		)
	Net other property and equipment	$	180		$	174

Derivative_Financial_Instrumen1

Derivative Financial Instruments (Tables)	9 Months Ended
	Sep. 30, 2014
Derivative Instruments and Hedges, Assets [Abstract]	'
Outstanding contracts that are not designated for hedge accounting	'
	At September 30, 2014, we had outstanding derivative positions as set forth in the tables below.
	Natural Gas
						NYMEX Contract Price Per MMBtu
														Collars								Estimated Fair Value Asset (Liability)
	Period and Type of Instrument		Volume in MMMBtus			Swaps (Weighted Average)				Sold Puts (Weighted Average)				Floors (Weighted Average)				Ceilings (Weighted Average)
																						(In millions)
	2014:00:00
	Fixed-price swaps		20,400			$	3.97			$	—			$	—			$	—			$	(2	)
	Collars		5,980			—				—				3.75				4.62				—
	2015:00:00
	Fixed-price swaps		49,275			4.28				—				—				—				14
	Collars		38,325			—				—				3.93				4.74				7
	Total																					$	19
	Crude Oil
						NYMEX Contract Price Per Bbl
														Collars								Estimated Fair Value
	Period and Type of Instrument		Volume in MBbls			Swaps				Sold Puts				Floors				Ceilings				Asset (Liability)
						(Weighted Average)				(Weighted Average)				(Weighted Average)				(Weighted Average)
																						(In millions)
	2014:00:00
	Fixed-price swaps		2,116			$	89.94			$	—			$	—			$	—			$	(1	)
	Fixed-price swaps with sold puts		1,472			95.16				75				—				—				7
	Collars with sold puts		552			—				75.83				90.83				102.93				1
	2015:00:00
	Fixed-price swaps		8,845			90.42				—				—				—				23
	Fixed-price swaps with sold puts		7,354			90.22				69.75				—				—				11
	Collars with sold puts		730			—				75				90				104				3
	2016:00:00
	Fixed-price swaps with sold puts		7,864			90.89				74.59				—				—				14
	Collars with sold puts		6,220			—				75				90				96.15				19
	Swaptions (1)		—			91				—				—				—				(1		)
	2017:00:00
	Fixed-price swaps with sold puts		1,180			90.63				75				—				—				2
	Collars with sold puts		2,080			—				75				90				95.59				6
	Total																					$	84
Derivative financial instruments recorded in balance sheet	'
	We had derivative financial instruments recorded in our consolidated balance sheet as assets (liabilities) at their respective estimated fair value, as set forth below.
			Derivative Assets																Derivative Liabilities
			Gross Fair Value				Offset in Balance Sheet				Balance Sheet Location								Gross Fair Value				Offset in Balance Sheet		Balance Sheet Location
											Current				Noncurrent										Current			Noncurrent
			(In millions)																(In millions)
	September 30, 2014
	Natural gas positions		$	23			$	(3	)		$	15			$	5			$	(4	)		$	3	$	(1	)	$	—
	Oil positions		141				(57		)		33				51				(57		)		57		—			—
	Total		$	164			$	(60	)		$	48			$	56			$	(61	)		$	60	$	(1	)	$	—
	December 31, 2013
	Natural gas positions		$	11			$	(2	)		$	—			$	9			$	(22	)		$	2	$	(20	)	$	—
	Oil positions		26				(9		)		—				17				(51		)		9		(42		)	—
	Total		$	37			$	(11	)		$	—			$	26			$	(73	)		$	11	$	(62	)	$	—
Schedule of Derivative Instruments, Gain (Loss) in Statement of Financial Performance [Table Text Block]	'
	Derivative Financial Instruments:
	Commodity Derivative Instruments
	We utilize derivative strategies that consist of either a single derivative instrument or a combination of instruments to manage the variability in cash flows associated with the forecasted sale of our future domestic oil and natural gas production. While the use of derivative instruments limits the downside risk of adverse commodity price movements, their use also may limit future income from favorable commodity price movements.
	In addition to the derivative strategies outlined in our annual Report on Form 10-K for the year ended December 31, 2013, we also utilize swaptions from time to time. A swaption is an option to exercise a swap where the buyer (counterparty) of the swaption purchases the right from the seller (Newfield), but not the obligation, to enter into a fixed-price swap with the seller on a predetermined date (expiration date). The swap price is a fixed price determined at the time of the swaption contract. If the swaption is exercised, the contract will become a swap treated consistent with our other fixed-price swaps.
	Our oil and gas derivative contracts are settled based upon reported prices on the NYMEX. The estimated fair value of these contracts is based upon various factors, including closing exchange prices on the NYMEX, over-the-counter quotations, estimated volatility, non-performance risk adjustments using credit default swaps and time to maturity. The calculation of the fair value of options requires the use of an option-pricing model. See Note 8, “Fair Value Measurements.”
	At September 30, 2014, we had outstanding derivative positions as set forth in the tables below.
	Natural Gas
						NYMEX Contract Price Per MMBtu
														Collars								Estimated Fair Value Asset (Liability)
	Period and Type of Instrument		Volume in MMMBtus			Swaps (Weighted Average)				Sold Puts (Weighted Average)				Floors (Weighted Average)				Ceilings (Weighted Average)
																						(In millions)
	2014:00:00
	Fixed-price swaps		20,400			$	3.97			$	—			$	—			$	—			$	(2	)
	Collars		5,980			—				—				3.75				4.62				—
	2015:00:00
	Fixed-price swaps		49,275			4.28				—				—				—				14
	Collars		38,325			—				—				3.93				4.74				7
	Total																					$	19
	Crude Oil
						NYMEX Contract Price Per Bbl
														Collars								Estimated Fair Value
	Period and Type of Instrument		Volume in MBbls			Swaps				Sold Puts				Floors				Ceilings				Asset (Liability)
						(Weighted Average)				(Weighted Average)				(Weighted Average)				(Weighted Average)
																						(In millions)
	2014:00:00
	Fixed-price swaps		2,116			$	89.94			$	—			$	—			$	—			$	(1	)
	Fixed-price swaps with sold puts		1,472			95.16				75				—				—				7
	Collars with sold puts		552			—				75.83				90.83				102.93				1
	2015:00:00
	Fixed-price swaps		8,845			90.42				—				—				—				23
	Fixed-price swaps with sold puts		7,354			90.22				69.75				—				—				11
	Collars with sold puts		730			—				75				90				104				3
	2016:00:00
	Fixed-price swaps with sold puts		7,864			90.89				74.59				—				—				14
	Collars with sold puts		6,220			—				75				90				96.15				19
	Swaptions (1)		—			91				—				—				—				(1		)
	2017:00:00
	Fixed-price swaps with sold puts		1,180			90.63				75				—				—				2
	Collars with sold puts		2,080			—				75				90				95.59				6
	Total																					$	84
	________
	-1	During the third quarter of 2014, we sold crude oil swaption contracts that, if exercised on their expiration date in the first quarter of 2015, would hedge 732 MBbls of calendar-year 2016 production. These contracts give the counterparties the option to enter into swap contracts with us at $91.00/Bbl for calendar-year 2016.
	Additional Disclosures about Derivative Financial Instruments
	We had derivative financial instruments recorded in our consolidated balance sheet as assets (liabilities) at their respective estimated fair value, as set forth below.
			Derivative Assets																Derivative Liabilities
			Gross Fair Value				Offset in Balance Sheet				Balance Sheet Location								Gross Fair Value				Offset in Balance Sheet		Balance Sheet Location
											Current				Noncurrent										Current			Noncurrent
			(In millions)																(In millions)
	September 30, 2014
	Natural gas positions		$	23			$	(3	)		$	15			$	5			$	(4	)		$	3	$	(1	)	$	—
	Oil positions		141				(57		)		33				51				(57		)		57		—			—
	Total		$	164			$	(60	)		$	48			$	56			$	(61	)		$	60	$	(1	)	$	—
	December 31, 2013
	Natural gas positions		$	11			$	(2	)		$	—			$	9			$	(22	)		$	2	$	(20	)	$	—
	Oil positions		26				(9		)		—				17				(51		)		9		(42		)	—
	Total		$	37			$	(11	)		$	—			$	26			$	(73	)		$	11	$	(62	)	$	—
	The amount of gain (loss) recognized in “Commodity derivative income (expense)” in our consolidated statement of operations related to our derivative financial instruments follows:
			Three Months Ended								Nine Months Ended
			September 30,								September 30,
			2014				2013				2014				2013
			(In millions)
	Derivatives not designated as hedging instruments:
	Realized gain (loss) on natural gas positions		$	(2	)		$	19			$	(36	)		$	51
Realized gain (loss) on oil positions		(18		)		(12		)		(70		)		(9		)
Total realized gain (loss)		(20		)		7				(106		)		42
Unrealized gain (loss) on natural gas positions		38				(6		)		30				(24		)
Unrealized gain (loss) on oil positions		285				(100		)		109				(84		)
Total unrealized gain (loss)		323				(106		)		139				(108		)
Total		$	303			$	(99	)		$	33			$	(66	)
The use of derivative transactions involves the risk that the counterparties will be unable to meet the financial terms of such transactions. Our derivative contracts are with multiple counterparties to minimize our exposure to any individual counterparty, and we have netting arrangements with all of our counterparties that provide for offsetting payables against receivables from separate derivative instruments with that counterparty. At September 30, 2014, 10 of our 16 counterparties accounted for approximately 85% of our contracted volumes, with no single counterparty accounting for more than 15%.
A portion of our derivative instruments are with lenders under our credit facility. Our credit facility, senior notes, senior subordinated notes and substantially all of our derivative instruments contain provisions that provide for cross defaults and acceleration of those debt and derivative instruments in certain situations.
Schedule of Derivative Instruments, Gain (Loss) in Statement of Operations [Table Text Block]	'
	The amount of gain (loss) recognized in “Commodity derivative income (expense)” in our consolidated statement of operations related to our derivative financial instruments follows:
			Three Months Ended								Nine Months Ended
			September 30,								September 30,
			2014				2013				2014				2013
			(In millions)
	Derivatives not designated as hedging instruments:
	Realized gain (loss) on natural gas positions		$	(2	)		$	19			$	(36	)		$	51
	Realized gain (loss) on oil positions		(18		)		(12		)		(70		)		(9		)
	Total realized gain (loss)		(20		)		7				(106		)		42
	Unrealized gain (loss) on natural gas positions		38				(6		)		30				(24		)
	Unrealized gain (loss) on oil positions		285				(100		)		109				(84		)
	Total unrealized gain (loss)		323				(106		)		139				(108		)
	Total		$	303			$	(99	)		$	33			$	(66	)

Accounts_Receivable_Tables

Accounts Receivable (Tables) (USD $)	9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014							Dec. 31, 2013
Accounts Notes And Loans Receivable [Line Items]	'							'
Accounts Receivable, Net, Current	$395							$474
Accounts Receivable	'							'
	Accounts receivable consisted of the following:
		September 30,			December 31,
		2014			2013
		(In millions)
	Revenue	$	176		$	294
	Joint interest	183			156
	Other	37			25
	Reserve for doubtful accounts	(1		)	(1		)
	Total accounts receivable	$	395		$	474
Revenue [Member]	'							'
Accounts Notes And Loans Receivable [Line Items]	'							'
Accounts Receivable, Net, Current	176							294
Other accounts receivable [Member]	'							'
Accounts Notes And Loans Receivable [Line Items]	'							'
Accounts Receivable, Net, Current	37							25
Allowance For Doubtful Accounts [Member]	'							'
Accounts Notes And Loans Receivable [Line Items]	'							'
Accounts Receivable, Net, Current	-1							-1
Oil and Gas Joint Interest Billing [Member]	'							'
Accounts Notes And Loans Receivable [Line Items]	'							'
Accounts Receivable, Net, Current	$183							$156

Accrued_Liabilities_Tables

Accrued Liabilities (Tables)	9 Months Ended
	Sep. 30, 2014
Accrued Liabilities, Current [Abstract]	'
Accrued Liabilities	'
	Accrued liabilities consisted of the following:
		September 30,		December 31,
		2014		2013
		(In millions)
	Revenue payable	$	179	$	175
	Accrued capital costs	449		458
	Accrued lease operating expenses	27		71
	Employee incentive expense	49		64
	Accrued interest on debt	48		72
	Taxes payable	28		93
	Other	47		45
	Total accrued liabilities	$	827	$	978

Fair_Value_Measurements_Tables

Fair Value Measurements (Tables)	9 Months Ended
	Sep. 30, 2014
Fair Value Disclosures [Abstract]	'
Fair value by measurement classification and type Table	'
	The following table summarizes the valuation of our assets and liabilities that are measured at fair value on a recurring basis.
			Fair Value Measurement Classification
			Quoted Prices in Active Markets for Identical Assets or Liabilities (Level 1)			Significant Other Observable Inputs (Level 2)			Significant Unobservable Inputs (Level 3)				Total
			(In millions)
	As of December 31, 2013:
	Money market fund investments		$	2		$	—		$	—			$	2
	Deferred compensation plan assets		8			—			—				8
	Investments available-for-sale:
	Equity securities		8			—			—				8
	Auction rate securities		—			—			39				39
	Oil and gas derivative swap contracts		—			(28		)	—				(28		)
	Oil and gas derivative option contracts		—			—			(8		)		(8		)
	Stock-based compensation liability awards		(11		)	—			(5		)		(16		)
	Total		$	7		$	(28	)	$	26			$	5
	As of September 30, 2014:
	Money market fund investments		$	365		$	—		$	—			$	365
	Deferred compensation plan assets		9			—			—				9
	Equity securities available-for-sale		9			—			—				9
	Oil and gas derivative swap contracts		—			104			—				104
	Oil and gas derivative option contracts		—			—			(1		)		(1		)
	Stock-based compensation liability awards		(13		)	—			(7		)		(20		)
	Total		$	370		$	104		$	(8	)		$	466
Fair value changes level 3 Table	'
	The following table sets forth a reconciliation of changes in the fair value of financial assets and liabilities classified as Level 3 in the fair value hierarchy for the indicated periods.
			Investments			Derivatives			Stock-Based Compensation				Total
			(In millions)
	Balance at January 1, 2013		$	36		$	115		$	—			$	151
	Realized or unrealized gains (losses):
	Included in earnings		—			(59		)	(8		)		(67		)
	Included in other comprehensive income (loss)		4			—			—				4
	Purchases, issuances, sales and settlements:
	Settlements		(1		)	(46		)	—				(47		)
	Transfers in to Level 3		—			—			—				—
	Transfers out of Level 3		—			—			—				—
	Balance at September 30, 2013		$	39		$	10		$	(8	)		$	41
	Change in unrealized gains or losses included in earnings relating to Level 3 instruments still held at September 30, 2013		$	—		$	(8	)	$	(8	)		$	(16	)
	Balance at January 1, 2014		$	39		$	(8	)	$	(5	)		$	26
	Realized or unrealized gains (losses) included in earnings		—			—			(42		)		(42		)
	Purchases, issuances, sales and settlements:
	Sales		(39		)	—			—				(39		)
	Settlements		—			4			40				44
	Transfers in to Level 3		—			—			—				—
	Transfers out of Level 3(1)		—			3			—				3
	Balance at September 30, 2014		$	—		$	(1	)	$	(7	)		$	(8	)
	Change in unrealized gains or losses included in earnings relating to Level 3 instruments still held at September 30, 2014		$	—		$	20		$	(3	)		$	17
	________
	-1	During the second quarter of 2014, we transferred $3 million of derivative option contracts out of the Level 3 hierarchy. The transfer was a result of our Level 3 swaptions being exercised by the counterparties as swaps on May 30, 2014.
Quantitative disclosures about unobservable inputs	'
			Estimated Fair Value Asset (Liability)			Quantitative Information about Level 3 Fair Value Measurements
	Instrument Type					Valuation Technique		Unobservable Input	Range
			(In millions)
	Oil option contracts		$	(8	)	Black-Scholes		Oil price volatility	14.54	%		—		52.12	%
								Credit risk	0.01	%		—		3.95	%
	Natural gas option contracts		$	7		Black-Scholes		Natural gas price volatility	24.78	%		—		50.03	%
								Credit risk	0.01	%		—		0.64	%
	SVAP		$	(7	)	Monte Carlo		Implied volatility						37	%
Estimated fair value of the debt instrument at the balance sheet date	'
	The estimated fair value of our notes, based on quoted prices in active markets (Level 1) as of the indicated dates, was as follows:
			September 30,			December 31,
			2014			2013
			(In millions)
	5¾% Senior Notes due 2022		$	836		$	767
	5⅝% Senior Notes due 2024		1,072			1,025
	7⅛% Senior Subordinated Notes due 2018		615			624
	6⅞% Senior Subordinated Notes due 2020		730			755

Debt_Tables

Debt (Tables)	9 Months Ended
	Sep. 30, 2014
Debt Disclosure [Abstract]	'
Debt	'
	Our debt consisted of the following:
		September 30,			December 31,
		2014			2013
		(In millions)
	Senior unsecured debt:
	Revolving credit facility - LIBOR based loans	$	—		$	585
	Money market lines of credit(1)	—			64
	Total credit arrangements	—			649
	5¾% Senior Notes due 2022	750			750
	5⅝% Senior Notes due 2024	1,000			1,000
	Total senior unsecured debt	1,750			2,399
	7⅛% Senior Subordinated Notes due 2018(2)	600			600
	6⅞% Senior Subordinated Notes due 2020	700			700
	Discount on notes	(4		)	(5		)
	Total long-term debt	$	3,046		$	3,694
	________
	(1) Because capacity under our credit facility was available to repay borrowings under our money market lines of credit as of the indicated dates, amounts outstanding under these obligations, if any, are classified as long-term.
	(2) In September 2014, we called for the redemption of these Notes. See Note 15, “Subsequent Events.”

Income_Taxes_Tables

Income Taxes (Tables)	9 Months Ended
	Sep. 30, 2014
Income Tax Disclosure [Abstract]	'
Provision for income taxes using federal statutory rate	'
	The provision (benefit) for income taxes for continuing operations for the indicated periods was different than the amount computed using the federal statutory rate (35%) for the following reasons:
		Three Months Ended					Nine Months Ended
		September 30,					September 30,
		2014		2013			2014		2013
		(In millions)
	Amount computed using the statutory rate	$	152	$	(3	)	$	156	$	43
	Increase (decrease) in taxes resulting from:
	State and local income taxes, net of federal effect	4		1			9		4
	Total provision (benefit) for income taxes	$	156	$	(2	)	$	165	$	47

StockBased_Compensation_Tables

Stock-Based Compensation (Tables)	9 Months Ended
	Sep. 30, 2014
Share-based Compensation [Abstract]	'
Schedule of Stock Based Compensation Expense Table	'
	Our stock-based compensation consisted of the following:
			Three Months Ended								Nine Months Ended
			September 30,								September 30,
			2014				2013				2014				2013
			(In millions)
	Equity awards		$	15			$	12			$	37			$	35
	Liability awards:
	Stockholder Value Appreciation Program		(12		)		8				42				8
	Cash-settled restricted stock units		5				5				21				6
	Total liability awards		(7		)		13				63				14
	Total stock-based compensation		8				25				100				49
	Capitalized in oil and gas properties		2				(7		)		(38		)		(14		)
	Net stock-based compensation expense		$	10			$	18			$	62			$	35
Stock Option Activity Table	'
	The following table provides information about stock option activity.
			Number of Shares Underlying Options			Weighted-				Weighted-				Weighted-		Aggregate
						Average				Average				Average		Intrinsic
						Exercise				Grant Date				Remaining		Value(1)
						Price				Fair Value				Contractual Life
						per Share				per Share
			(In thousands)											(In years)		(In millions)
	Outstanding at December 31, 2013		687			$	39.68							1.9		$	—
	Granted		—			—				$	—
	Exercised		(134	)		29.32										1
	Forfeited		(236	)		40.22
	Outstanding at September 30, 2014		317			$	43.64							2.3		$	—
	Exercisable at September 30, 2014		317			$	43.64							2.3		$	—
	________
	-1	The intrinsic value of a stock option is the amount by which the market value of our common stock at the indicated date, or at the time of exercise, exceeds the exercise price of the option.
Restricted Stock and Restricted Stock Unit Activity Table	'
	The following table provides information about restricted stock and restricted stock unit activity.
			Service-Based			Performance/			Total			Weighted- Average Grant Date Fair Value per Share
			Shares			Market-Based			Shares
						Shares
			(In thousands, except per share data)
	Non-vested shares outstanding at December 31, 2013		2,999			706			3,705			$	33.31
	Granted		382			339			721			25.24
	Forfeited		(353	)		(46	)		(399	)		26
	Vested		(1,088	)		(30	)		(1,118	)		36.61
	Non-vested shares outstanding at September 30, 2014		1,940			969			2,909			$	30.19

Supplemental_Cash_Flows_Inform1

Supplemental Cash Flows Information (Tables)	9 Months Ended
	Sep. 30, 2014
Supplemental Cash Flow Information [Abstract]	'
Supplemental Cash Flows Information Schedule (Table)	'
		Nine Months Ended
		September 30,
		2014			2013
		(In millions)
	Non-cash items excluded from the statement of cash flows:
	(Increase) decrease in receivables for property sales	$	(17	)	$	(4	)
	(Increase) decrease in receivables from sale of Malaysia business	(15		)	—
	(Increase) decrease in accrued capital expenditures	2			(55		)
	(Increase) decrease in asset retirement costs	18			(8		)
	Increase (decrease) in deferred liabilities	(90		)	—

Organization_and_Summary_of_Si2

Organization and Summary of Significant Accounting Policies (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
	MBbls		MBbls		MBbls
Change in ARO (asset retirement obligation)	'	'	'	'	'
Less: Current portion of ARO	($5)	'	($5)	'	($54)
Total long-term ARO	105	'	105	'	201
Organization and Summary of Significant Accounting Policies (Textuals) [Abstract]	'	'	'	'	'
Crude oil inventory (in barrels)	75	'	75	'	1,100
Crude oil inventory	3	'	3	'	90
Capitalization of internal costs per full cost method of accounting	38	47	158	147	'
Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax	'	'	249	'	'
Discontinued Operation, Gain (Loss) from Disposal of Discontinued Operation, before Income Tax	$0	$0	$388	$0	'

Earnings_Per_Share_Details

Earnings Per Share (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, except Per Share data, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Income (numerator):	'	'	'	'
Income (Loss) from Continuing Operations Attributable to Parent	$279	($4)	$280	$77
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent	-1	31	260	53
Net income (loss)	278	27	540	130
Preferred Stock Dividends and Other Adjustments	0	-20	0	-20
Net Income (Loss) Available to Common Stockholders, Basic	278	7	540	110
Weighted average shares (denominator):	'	'	'	'
Weighted average shares - basic	137	136	137	135
Dilution effect of stock options and unvested restricted stock and restricted stock units outstanding at end of period	1	0	1	1
Weighted average shares - diluted	138	136	138	136
Basic --	'	'	'	'
Income (Loss) from Continuing Operations, Per Basic Share	$2.04	($0.03)	$2.06	$0.57
Income (Loss) from Discontinued Operations, Net of Tax, Before Preferred Share Repurchase, Per Basic Share	$0	$0.23	$1.90	$0.39
Income (Loss) Attributable to Repurchase of Preferred Shares of Wholly-owned Subsidiary, Per Basic Share	$0	($0.15)	$0	($0.15)
Income (Loss) from Discontinued Operations, Net of Tax, Per Basic Share	$0	$0.08	$1.90	$0.24
Earnings (Loss) Per Share, Basic	$2.04	$0.05	$3.96	$0.81
Diluted --	'	'	'	'
Income (Loss) from Continuing Operations, Per Diluted Share	$2.02	($0.03)	$2.04	$0.57
Income (Loss) from Discontinued Operations, Net of Tax, Before Preferred Share Repurchase, Per Diluted Share	$0	$0.23	$1.88	$0.39
Income (Loss) Attributable to Repurchase of Preferred Shares of Wholly-owned Subsidiary, Per Diluted Share	$0	($0.15)	$0	($0.15)
Income (Loss) from Discontinued Operations, Net of Tax, Per Diluted Share	$0	$0.08	$1.88	$0.24
Earnings (Loss) Per Share, Diluted	$2.02	$0.05	$3.92	$0.81
Earnings Per Share (Textuals) [Abstract]	'	'	'	'
Incremental shares attributable to the assumed exercise of outstanding stock options and the assumed vesting of unvested restricted stock and restricted stock units	0.3	0.7	1.1	4.1
Payments for Repurchase of Preferred Stock and Preference Stock	'	$20	$0	$20

Discontinued_Operations_Detail

Discontinued Operations (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
	MBbls		MBbls		MBbls
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]	'	'	'	'	'
Disposal Group, Including Discontinued Operation, Consideration	$898	'	$898	'	'
Gain on Sale of Malaysia, before Income Tax	0	0	388	0	'
Gain on Sale of Malaysia, Net of Tax	'	'	249	'	'
Disposal Group, Including Discontinued Operation, Operating Income (Loss)	2	-61	-29	-158	'
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent	1	-31	-260	-53	'
Discontinued Operation, Tax Effect of Discontinued Operation	-1	29	157	103	'
Historical Effective Tax Rate, Discontinuing Operations	'	'	37.00%	'	'
Effective Income Tax Rate, Discontinuing Operations	63.10%	48.20%	37.80%	65.70%	'
Capitalized Costs of Unproved Properties Excluded from Amortization, Cumulative	1,438	'	1,438	'	1,300
Less — accumulated depreciation, depletion and amortization	-7,915	'	-7,915	'	-8,306
Disposal Group, Including Discontinued Operation, Revenue	0	189	112	659	'
Disposal Group, Including Discontinued Operation, Operating Expense	2	128	83	501	'
Disposal Group, Including Discontinued Operation, Operating Income (Loss)	2	-61	-29	-158	'
Disposal Group, Including Discontinued Operation, Other Expense	0	1	0	2	'
Discontinued Operation, Gain (Loss) from Disposal of Discontinued Operation, before Income Tax	0	0	388	0	'
Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax	-2	60	417	156	'
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent	1	-31	-260	-53	'
Disposal Group, Including Discontinued Operation, Cash and Cash Equivalents	27	'	27	'	84
Disposal Group, Including Discontinued Operation, Accounts, Notes and Loans Receivable, Net	89	'	89	'	200
Disposal Group, Including Discontinued Operation, Inventory	14	'	14	'	130
Disposal Group, Including Discontinued Operation, Other Current Assets	5	'	5	'	33
Assets of Disposal Group, Including Discontinued Operation, Current	135	'	135	'	447
Disposal Group, including Discontinued Operations, Oil and Gas Properties, Net	540	'	540	'	989
Disposal Group, Including Discontinued Operation, Deferred Tax Assets	0	'	0	'	19
Disposal Group, Including Discontinued Operation, Other Noncurrent Assets	1	'	1	'	4
Assets of Disposal Group, Including Discontinued Operation, Noncurrent	541	'	541	'	1,012
Assets of Disposal Group, Including Discontinued Operation	676	'	676	'	1,459
Disposal Group, Including Discontinued Operation, Accounts Payable	3	'	3	'	38
Disposal Group, Including Discontinued Operation, Accrued Liabilities	202	'	202	'	324
Disposal Group, Including Discontinued Operations, Asset Retirement Obligation, Current	0	'	0	'	49
Disposal Group, Including Discontinued Operation, Other Current Liabilities	0	'	0	'	18
Liabilities of Disposal Group, Including Discontinued Operation, Current	205	'	205	'	429
Disposal Group, Including Discontinued Operations, Asset Retirement Obligations	2	'	2	'	86
Disposal Group, Including Discontinued Operation, Deferred Tax Liabilities	104	'	104	'	129
Disposal Group, Including Discontinued Operation, Other Noncurrent Liabilities	0	'	0	'	11
Liabilities of Disposal Group, Including Discontinued Operation, Noncurrent	106	'	106	'	226
Liabilities of Disposal Group, Including Discontinued Operation	311	'	311	'	655
Crude oil inventory in barrels	75	'	75	'	1,100
Energy Related Inventory, Petroleum	3	'	3	'	90
CHINA	'	'	'	'	'
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]	'	'	'	'	'
Disposal Group, Including Discontinued Operation, Operating Income (Loss)	2	-9	-8	-26	'
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent	1	-8	-2	-13	'
Disposal Group, Including Discontinued Operation, Operating Income (Loss)	2	-9	-8	-26	'
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent	1	-8	-2	-13	'
MALAYSIA	'	'	'	'	'
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]	'	'	'	'	'
Capitalized Costs of Unproved Properties Excluded from Amortization, Cumulative	'	'	'	'	115
Asset Retirement Obligation, Period Increase (Decrease)	'	'	133	'	'
Discontinued Operations [Member]	'	'	'	'	'
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]	'	'	'	'	'
Less — accumulated depreciation, depletion and amortization	-118	'	-118	'	-1,121
Current [Member]	'	'	'	'	'
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]	'	'	'	'	'
Discontinued Operation, Tax Effect of Discontinued Operation	-1	10	13	65	'
Deferred [Member]	'	'	'	'	'
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]	'	'	'	'	'
Discontinued Operation, Tax Effect of Discontinued Operation	$0	$19	$144	$38	'

Oil_and_Gas_Assets_Details

Oil and Gas Assets (Details) (USD $)	9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Property, Plant and Equipment [Line Items]	'	'	'
Oil and Gas Property, Full Cost Method, Gross	$15,786	'	$16,407
Oil and Gas Property, Full Cost Method, Depletion	7,915	'	8,306
Oil and Gas Property, Full Cost Method, Net	7,871	'	8,101
Oil and gas properties:	'	'	'
Subject to amortization	14,348	'	15,107
Capitalized Costs of Unproved Properties Excluded from Amortization, Cumulative	1,438	'	1,300
Accumulated depreciation and amortization	-81	'	-69
Net other property and equipment	180	'	174
Cost of oil and gas properties not subject to amortization	'	'	'
Acquisition costs	824	'	'
Exploration costs	354	'	'
Development costs	64	'	'
Fee mineral interests	24	'	'
Capitalized interest	172	'	'
Capitalized Costs of Unproved Properties Excluded from Amortization, Cumulative	1,438	'	1,300
Oil and Gas Assets (Textuals) [Abstract]	'	'	'
Non Strategic Assets Sold	588	'	'
Proceeds from Sale of Oil and Gas Property and Equipment	616	25	'
Furniture and Fixtures [Member]	'	'	'
Oil and gas properties:	'	'	'
Other property and equipment	150	'	139
Gas Gathering and Processing Equipment [Member]	'	'	'
Oil and gas properties:	'	'	'
Other property and equipment	111	'	104
Costs incurred in 2014 not subject to amortization [Member]	'	'	'
Oil and gas properties:	'	'	'
Capitalized Costs of Unproved Properties Excluded from Amortization, Cumulative	527	'	'
Cost of oil and gas properties not subject to amortization	'	'	'
Acquisition costs	129	'	'
Exploration costs	345	'	'
Development costs	14	'	'
Fee mineral interests	0	'	'
Capitalized interest	39	'	'
Capitalized Costs of Unproved Properties Excluded from Amortization, Cumulative	527	'	'
Costs incurred in 2013 not subject to amortization [Member]	'	'	'
Oil and gas properties:	'	'	'
Capitalized Costs of Unproved Properties Excluded from Amortization, Cumulative	262	'	'
Cost of oil and gas properties not subject to amortization	'	'	'
Acquisition costs	199	'	'
Exploration costs	1	'	'
Development costs	8	'	'
Fee mineral interests	1	'	'
Capitalized interest	53	'	'
Capitalized Costs of Unproved Properties Excluded from Amortization, Cumulative	262	'	'
Costs incurred in 2012 not subject to amortization [Member]	'	'	'
Oil and gas properties:	'	'	'
Capitalized Costs of Unproved Properties Excluded from Amortization, Cumulative	185	'	'
Cost of oil and gas properties not subject to amortization	'	'	'
Acquisition costs	86	'	'
Exploration costs	1	'	'
Development costs	31	'	'
Fee mineral interests	0	'	'
Capitalized interest	67	'	'
Capitalized Costs of Unproved Properties Excluded from Amortization, Cumulative	185	'	'
Costs incurred in 2011 and prior not subject to amortization [Member]	'	'	'
Oil and gas properties:	'	'	'
Capitalized Costs of Unproved Properties Excluded from Amortization, Cumulative	464	'	'
Cost of oil and gas properties not subject to amortization	'	'	'
Acquisition costs	410	'	'
Exploration costs	7	'	'
Development costs	11	'	'
Fee mineral interests	23	'	'
Capitalized interest	13	'	'
Capitalized Costs of Unproved Properties Excluded from Amortization, Cumulative	$464	'	'

Derivative_Financial_Instrumen2

Derivative Financial Instruments (Textuals) (Details) (USD $)	Sep. 30, 2014
In Millions, unless otherwise specified
Derivative [Line Items]	'
Total Derivative Counterparties	16
Primary Derivative Counterparties	10
Percent of future hedged production with primary counterparties	85.00%
Number of counterparties holding more than 25 percent of future hedge position.	0
Concentraction Of Future Hedged Production	15.00%
Year2015 [Member] | Natural gas contracts [Member] | Swap [Member]	'
Derivative [Line Items]	'
Derivative, Swap Type, Average Fixed Price	4.28
Volume In Mmbtus	49,275,000
Year2015 [Member] | Oil contracts [Member] | Swap [Member]	'
Derivative [Line Items]	'
Volume in MBbls	8,845,000
Derivative, Swap Type, Average Fixed Price	90.42
Year 2016 [Member] | Oil contracts [Member] | Swaption [Member]	'
Derivative [Line Items]	'
Volume in MBbls	732,000
Derivative, Swap Type, Average Fixed Price	91
Derivative Instruments Not Designated as Hedging Instruments, Liability, at Fair Value	1

Outstanding_Natural_Gas_Contra

Outstanding Natural Gas Contracts That Are Not Designated for Hedge Accounting (Details) (Natural gas contracts [Member], USD $)	Sep. 30, 2014
In Millions, unless otherwise specified
Derivative [Line Items]	'
Derivative Asset, Fair Value, Total	$19
Collars [Member] | Year 2014 [Member]	'
Derivative [Line Items]	'
Natural Gas Volumes	5,980,000
Derivative Liability, Fair Value, Total	0
Derivative, Weighted Average Floor Price	3.75
Derivative, Weighted Average Ceiling Price	4.62
Collars [Member] | Year2015 [Member]	'
Derivative [Line Items]	'
Natural Gas Volumes	38,325,000
Derivative, Weighted Average Floor Price	3.93
Derivative, Weighted Average Ceiling Price	4.74
Derivative Asset, Fair Value, Total	7
Fixed-price swaps | Year 2014 [Member]	'
Derivative [Line Items]	'
Natural Gas Volumes	20,400,000
Derivative, Swap Type, Average Fixed Price	3.97
Derivative Liability, Fair Value, Total	-2
Fixed-price swaps | Year2015 [Member]	'
Derivative [Line Items]	'
Natural Gas Volumes	49,275,000
Derivative, Swap Type, Average Fixed Price	4.28
Derivative Asset, Fair Value, Total	$14

Outstanding_Oil_Contracts_That

Outstanding Oil Contracts That Are Not Designated For Hedge Accounting (Details) (Oil contracts [Member], USD $)	Sep. 30, 2014
In Millions, unless otherwise specified
Derivative [Line Items]	'
Derivative Instruments Not Designated as Hedging Instruments, Asset, at Fair Value	$84
Fixed Price Swaps With Sold Puts [Member] | Year 2014 [Member]	'
Derivative [Line Items]	'
Volume in MBbls	1,472,000
Derivative, Swap Type, Average Fixed Price	95.16
Derivative Weighted Average Additional Put Price	75
Derivative Instruments Not Designated as Hedging Instruments, Asset, at Fair Value	7
Fixed Price Swaps With Sold Puts [Member] | Year2015 [Member]	'
Derivative [Line Items]	'
Volume in MBbls	7,354,000
Derivative, Swap Type, Average Fixed Price	90.22
Derivative Weighted Average Additional Put Price	69.75
Derivative Instruments Not Designated as Hedging Instruments, Asset, at Fair Value	11
Fixed Price Swaps With Sold Puts [Member] | Year 2016 [Member]	'
Derivative [Line Items]	'
Volume in MBbls	7,864,000
Derivative, Swap Type, Average Fixed Price	90.89
Derivative Weighted Average Additional Put Price	74.59
Derivative Instruments Not Designated as Hedging Instruments, Asset, at Fair Value	14
Fixed Price Swaps With Sold Puts [Member] | Year2017 [Member]	'
Derivative [Line Items]	'
Volume in MBbls	1,180,000
Derivative, Swap Type, Average Fixed Price	90.63
Derivative Weighted Average Additional Put Price	75
Derivative Instruments Not Designated as Hedging Instruments, Asset, at Fair Value	2
Collars With Sold Puts [Member] | Year 2014 [Member]	'
Derivative [Line Items]	'
Volume in MBbls	552,000
Derivative Weighted Average Additional Put Price	75.83
Derivative Instruments Not Designated as Hedging Instruments, Asset, at Fair Value	1
Derivative, Weighted Average Floor Price	90.83
Derivative, Weighted Average Ceiling Price	103
Collars With Sold Puts [Member] | Year2015 [Member]	'
Derivative [Line Items]	'
Volume in MBbls	730,000
Derivative Weighted Average Additional Put Price	75
Derivative Instruments Not Designated as Hedging Instruments, Asset, at Fair Value	3
Derivative, Weighted Average Floor Price	90
Derivative, Weighted Average Ceiling Price	104
Collars With Sold Puts [Member] | Year 2016 [Member]	'
Derivative [Line Items]	'
Volume in MBbls	6,220,000
Derivative Weighted Average Additional Put Price	75
Derivative Instruments Not Designated as Hedging Instruments, Asset, at Fair Value	19
Derivative, Weighted Average Floor Price	90
Derivative, Weighted Average Ceiling Price	96.15
Collars With Sold Puts [Member] | Year2017 [Member]	'
Derivative [Line Items]	'
Volume in MBbls	2,080,000
Derivative Weighted Average Additional Put Price	75
Derivative Instruments Not Designated as Hedging Instruments, Asset, at Fair Value	6
Derivative, Weighted Average Floor Price	90
Derivative, Weighted Average Ceiling Price	95.59
Fixed-price swaps | Year 2014 [Member]	'
Derivative [Line Items]	'
Volume in MBbls	2,116,000
Derivative, Swap Type, Average Fixed Price	89.94
Derivative Liability, Fair Value, Total	-1
Fixed-price swaps | Year2015 [Member]	'
Derivative [Line Items]	'
Volume in MBbls	8,845,000
Derivative, Swap Type, Average Fixed Price	90.42
Derivative Instruments Not Designated as Hedging Instruments, Asset, at Fair Value	23
Swaption [Member] | Year 2016 [Member]	'
Derivative [Line Items]	'
Volume in MBbls	732,000
Derivative, Swap Type, Average Fixed Price	91
Derivative Liability, Fair Value, Total	($1)

Derivative_Financial_Instrumen3

Derivative Financial Instruments Recorded in Balance Sheet (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Derivative, Fair Value, Net [Abstract]	'	'
Derivative Asset Not Designated As Hedging Instrument, Fair Value	$164	$37
Derivative Asset, Fair Value, Gross Liability	-60	-11
Derivative Liability Not Designated as Hedging Instrument Fair Value	-61	-73
Derivative Liability, Fair Value, Gross Asset	60	11
Derivative Asset, Current	48	0
Derivative Asset, Noncurrent	56	26
Derivative Liability, Current	1	62
Derivative Liability, Noncurrent	0	0
Natural gas contracts [Member]	'	'
Derivative, Fair Value, Net [Abstract]	'	'
Derivative Asset Not Designated As Hedging Instrument, Fair Value	23	11
Derivative Asset, Fair Value, Gross Liability	-3	-2
Derivative Liability Not Designated as Hedging Instrument Fair Value	-4	-22
Derivative Liability, Fair Value, Gross Asset	3	2
Derivative Asset, Current	15	0
Derivative Asset, Noncurrent	5	9
Derivative Liability, Current	1	20
Derivative Liability, Noncurrent	0	0
Oil contracts [Member]	'	'
Derivative, Fair Value, Net [Abstract]	'	'
Derivative Asset Not Designated As Hedging Instrument, Fair Value	141	26
Derivative Asset, Fair Value, Gross Liability	-57	-9
Derivative Liability Not Designated as Hedging Instrument Fair Value	-57	-51
Derivative Liability, Fair Value, Gross Asset	57	9
Derivative Asset, Current	33	0
Derivative Asset, Noncurrent	51	17
Derivative Liability, Current	0	42
Derivative Liability, Noncurrent	$0	$0

Amount_of_Gain_Loss_Recognized

Amount of Gain Loss Recognized in Income Related to Derivative Financial Instruments (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net [Abstract]	'	'	'	'
Realized Gain (Loss) on Derivatives	($20)	$7	($106)	$42
Unrealized Gain (Loss) on Derivatives	323	-106	139	-108
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	303	-99	33	-66
Natural gas contracts [Member]	'	'	'	'
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net [Abstract]	'	'	'	'
Realized Gain (Loss) on Derivatives	-2	19	-36	51
Unrealized Gain (Loss) on Derivatives	38	-6	30	-24
Oil contracts [Member]	'	'	'	'
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net [Abstract]	'	'	'	'
Realized Gain (Loss) on Derivatives	-18	-12	-70	-9
Unrealized Gain (Loss) on Derivatives	$285	($100)	$109	($84)

Accrued_Liabilities_Details

Accrued Liabilities (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Accrued Liabilities [Line Items]	'	'
Accrued liabilities	$827	$978
Revenue payable [Member]	'	'
Accrued Liabilities [Line Items]	'	'
Accrued liabilities	179	175
Accrued capital costs [Member]	'	'
Accrued Liabilities [Line Items]	'	'
Accrued liabilities	449	458
Accrued lease operating expenses [Member]	'	'
Accrued Liabilities [Line Items]	'	'
Accrued liabilities	27	71
Employee incentive expense [Member]	'	'
Accrued Liabilities [Line Items]	'	'
Accrued liabilities	49	64
Accrued interest on debt [Member]	'	'
Accrued Liabilities [Line Items]	'	'
Accrued liabilities	48	72
Taxes payable [Member]	'	'
Accrued Liabilities [Line Items]	'	'
Accrued liabilities	28	93
Other accrued liabilities [Member]	'	'
Accrued Liabilities [Line Items]	'	'
Accrued liabilities	$47	$45

Fair_Value_Measurements_Textua

Fair Value Measurements (Textuals) (Details) (USD $)

9 Months Ended

9 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

9 Months Ended

9 Months Ended

In Millions, unless otherwise specified

Sep. 30, 2014

Sep. 30, 2013

Dec. 31, 2013

Dec. 31, 2012

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Dec. 31, 2013

Mar. 31, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Sep. 30, 2013

Dec. 31, 2013

Dec. 31, 2012

Sep. 30, 2014

Sep. 30, 2013

Dec. 31, 2013

Dec. 31, 2012

Sep. 30, 2014

Sep. 30, 2013

Dec. 31, 2013

Dec. 31, 2012

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Oil contracts [Member]

Oil contracts [Member]

Oil contracts [Member]

Oil contracts [Member]

Natural gas contracts [Member]

Natural gas contracts [Member]

Natural gas contracts [Member]

Natural gas contracts [Member]

Equity Securities [Member]

Equity Securities [Member]

Auction Rate Securities [Member]

Auction Rate Securities [Member]

Swap [Member]

Swap [Member]

Commodity Option [Member]

Commodity Option [Member]

Quoted Prices In Active Markets for Identical Assets or Liabilities, Fair Value Inputs (Level 1) [Member]

Quoted Prices In Active Markets for Identical Assets or Liabilities, Fair Value Inputs (Level 1) [Member]

Quoted Prices In Active Markets for Identical Assets or Liabilities, Fair Value Inputs (Level 1) [Member]

Quoted Prices In Active Markets for Identical Assets or Liabilities, Fair Value Inputs (Level 1) [Member]

Quoted Prices In Active Markets for Identical Assets or Liabilities, Fair Value Inputs (Level 1) [Member]

Quoted Prices In Active Markets for Identical Assets or Liabilities, Fair Value Inputs (Level 1) [Member]

Quoted Prices In Active Markets for Identical Assets or Liabilities, Fair Value Inputs (Level 1) [Member]

Quoted Prices In Active Markets for Identical Assets or Liabilities, Fair Value Inputs (Level 1) [Member]

Quoted Prices In Active Markets for Identical Assets or Liabilities, Fair Value Inputs (Level 1) [Member]

Significant Other Observable Fair Value Inputs (Level 2) [Member]

Significant Other Observable Fair Value Inputs (Level 2) [Member]

Significant Other Observable Fair Value Inputs (Level 2) [Member]

Significant Other Observable Fair Value Inputs (Level 2) [Member]

Significant Other Observable Fair Value Inputs (Level 2) [Member]

Significant Other Observable Fair Value Inputs (Level 2) [Member]

Significant Other Observable Fair Value Inputs (Level 2) [Member]

Significant Other Observable Fair Value Inputs (Level 2) [Member]

Significant Other Observable Fair Value Inputs (Level 2) [Member]

Fair Value, Inputs, Level 3 [Member]

Fair Value, Inputs, Level 3 [Member]

Fair Value, Inputs, Level 3 [Member]

Fair Value, Inputs, Level 3 [Member]

Fair Value, Inputs, Level 3 [Member]

Fair Value, Inputs, Level 3 [Member]

Fair Value, Inputs, Level 3 [Member]

Fair Value, Inputs, Level 3 [Member]

Fair Value, Inputs, Level 3 [Member]

Investments [Member]

Investments [Member]

Investments [Member]

Investments [Member]

Derivative Financial Instruments, Assets [Member]

Derivative Financial Instruments, Assets [Member]

Derivative Financial Instruments, Assets [Member]

Derivative Financial Instruments, Assets [Member]

Stock Compensation Plan [Member]

Stock Compensation Plan [Member]

Stock Compensation Plan [Member]

Stock Compensation Plan [Member]

5.75% Senior Notes Due 2022 [Member]

5.75% Senior Notes Due 2022 [Member]

5.625% Senior Notes Due 2024 [Member]

5.625% Senior Notes Due 2024 [Member]

7.125% Senior Subordinated Notes due 2018 [Member]

7.125% Senior Subordinated Notes due 2018 [Member]

6.875% Senior Subordinated Notes due 2020 [Member]

6.875% Senior Subordinated Notes due 2020 [Member]

Options Held [Member]

Maximum [Member]

Minimum [Member]

Options Held [Member]

Maximum [Member]

Minimum [Member]

Equity Securities [Member]

Equity Securities [Member]

Auction Rate Securities [Member]

Swap [Member]

Swap [Member]

Commodity Option [Member]

Commodity Option [Member]

Equity Securities [Member]

Equity Securities [Member]

Auction Rate Securities [Member]

Swap [Member]

Swap [Member]

Commodity Option [Member]

Commodity Option [Member]

Equity Securities [Member]

Equity Securities [Member]

Auction Rate Securities [Member]

Swap [Member]

Swap [Member]

Commodity Option [Member]

Commodity Option [Member]

Options Held [Member]

Options Held [Member]

Options Held [Member]

Options Held [Member]

Debt Instrument, Fair Value Disclosure

'

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$836

$767

$1,072

$1,025

$615

$624

$730

$755

Derivative Instruments Not Designated as Hedging Instruments, Asset, at Fair Value

'

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'

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-8

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'

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'

'

Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value

'

41

26

151

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'

'

'

'

'

'

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0

39

39

36

'

10

'

115

'

'

'

'

'

'

'

'

'

'

'

'

Liability Value

8

'

'

'

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'

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'

'

'

'

'

'

1

'

8

'

7

-8

5

0

'

'

'

'

'

'

'

'

Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss) Included in Investment Income

'

-16

'

'

'

'

'

'

'

'

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0

0

'

'

'

-8

'

'

'

-8

'

'

'

'

'

'

'

'

'

'

Fair Value, Liabilities Measured on Recurring Basis, Change in Unrealized Gain (Loss)

17

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20

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-3

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Money Market Funds, at Carrying Value

365

'

2

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365

2

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'

'

'

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'

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0

0

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'

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'

'

0

0

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'

Deferred Compensation Plan Assets

9

'

8

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

9

8

'

'

'

'

'

'

'

0

0

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'

0

0

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'

Fair Value Assumptions Expected Volatility Curves

'

'

'

'

'

'

52.12%

14.54%

'

'

50.03%

24.78%

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Fair Value Inputs, Entity Credit Risk

'

'

'

'

'

'

3.95%

0.01%

'

'

0.64%

0.01%

'

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Derivative Asset, Fair Value, Total

'

'

'

'

84

'

'

'

19

7

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Available-for-sale Securities, Fair Value Disclosure

'

'

'

'

'

'

'

'

'

'

'

'

9

8

'

39

'

'

'

'

'

'

9

8

0

'

'

'

'

'

'

0

0

0

'

'

'

'

'

'

0

0

39

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Derivative Assets

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

-104

'

'

'

'

'

'

'

'

'

0

0

0

'

'

'

'

'

-104

'

0

0

'

'

'

'

'

'

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Derivative Liability

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

-28

-1

-8

'

'

'

'

'

0

'

'

'

'

'

'

'

'

'

-28

'

'

'

'

'

'

'

0

'

-1

-8

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Assets, Fair Value Disclosure

466

'

5

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

370

7

'

'

'

'

'

'

'

104

'

'

'

'

'

'

'

'

'

26

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Financial and Nonfinancial Liabilities, Fair Value Disclosure

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

-28

'

'

'

'

'

'

'

-8

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings

-42

-67

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0

0

'

'

'

-59

'

'

'

-8

'

'

'

'

'

'

'

'

'

'

Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales

-39

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

-39

'

'

'

0

'

'

'

0

'

'

'

'

'

'

'

'

'

'

'

Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0

'

'

'

-42

'

'

'

'

'

'

'

'

'

'

'

Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)

'

4

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

4

'

'

'

0

'

'

'

0

'

'

'

'

'

'

'

'

'

'

Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements

'

47

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0

1

'

'

'

46

'

'

'

0

'

'

'

'

'

'

'

'

'

'

Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3

0

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0

0

'

'

0

0

'

'

0

0

'

'

'

'

'

'

'

'

'

'

Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Settlements

44

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

4

'

'

'

40

'

'

'

'

'

'

'

'

'

'

'

Fair Value, Measurement with Unobservable Inputs Reconciliation, Liability, Transfers out of Level 3

3

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0

0

'

'

3

0

'

'

0

0

'

'

'

'

'

'

'

'

'

'

Obligations, Fair Value Disclosure

-20

'

-16

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Proceeds from Sale of Available-for-sale Securities

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$39

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Valuation_of_Investments_and_F

Valuation of Investments and Financial Instrument Assets Liabilities By Pricing Levels (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Obligations, Fair Value Disclosure	$20	$16
Money market fund investments	365	2
Deferred Compensation Plan Assets	9	8
Total	466	5
Equity Securities [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Available-for-sale Securities	9	8
Auction Rate Securities [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Available-for-sale Securities	'	39
Swap [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Oil and gas derivative contracts	104	'
Quoted Prices In Active Markets for Identical Assets or Liabilities, Fair Value Inputs (Level 1) [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Money market fund investments	365	2
Deferred Compensation Plan Assets	9	8
Total	370	7
Quoted Prices In Active Markets for Identical Assets or Liabilities, Fair Value Inputs (Level 1) [Member] | Equity Securities [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Available-for-sale Securities	9	8
Quoted Prices In Active Markets for Identical Assets or Liabilities, Fair Value Inputs (Level 1) [Member] | Auction Rate Securities [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Available-for-sale Securities	'	0
Quoted Prices In Active Markets for Identical Assets or Liabilities, Fair Value Inputs (Level 1) [Member] | Swap [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Oil and gas derivative contracts	'	0
Quoted Prices In Active Markets for Identical Assets or Liabilities, Fair Value Inputs (Level 1) [Member] | Commodity Option [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Oil and gas derivative contracts	0	0
Quoted Prices In Active Markets for Identical Assets or Liabilities, Fair Value Inputs (Level 1) [Member] | Cash-Settled Restricted Stock Units [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Obligations, Fair Value Disclosure	13	11
Significant Other Observable Fair Value Inputs (Level 2) [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Obligations, Fair Value Disclosure	0	0
Money market fund investments	0	0
Deferred Compensation Plan Assets	0	0
Total	104	'
Significant Other Observable Fair Value Inputs (Level 2) [Member] | Equity Securities [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Available-for-sale Securities	0	0
Significant Other Observable Fair Value Inputs (Level 2) [Member] | Auction Rate Securities [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Available-for-sale Securities	'	0
Significant Other Observable Fair Value Inputs (Level 2) [Member] | Swap [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Oil and gas derivative contracts	104	'
Significant Other Observable Fair Value Inputs (Level 2) [Member] | Commodity Option [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Oil and gas derivative contracts	0	0
Fair Value, Inputs, Level 3 [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Money market fund investments	0	0
Deferred Compensation Plan Assets	0	0
Total	'	26
Fair Value, Inputs, Level 3 [Member] | Equity Securities [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Available-for-sale Securities	0	0
Fair Value, Inputs, Level 3 [Member] | Auction Rate Securities [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Available-for-sale Securities	'	39
Fair Value, Inputs, Level 3 [Member] | Swap [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Oil and gas derivative contracts	'	0
Fair Value, Inputs, Level 3 [Member] | Stockholder Value Appreciation Program [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Obligations, Fair Value Disclosure	$7	$5

Reconciliation_of_Changes_in_F

Reconciliation of Changes in Fair Value of Financial Assets and Liabilities Classified as Level Three In Fair Value Hierarchy (Details) (USD $)	9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'	'
Fair Value, Measurement with Unobservable Inputs Reconciliation, Liability, Transfers out of Level 3	$3	$0
Beginning Balance	26	151
Included in earnings	-42	-67
Included in other comprehensive income (loss)	'	4
Settlements	'	-47
Ending Balance	'	41
Change in unrealized gains (losses) relating to investments and derivatives still held	'	-16
Derivatives [Member]	'	'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'	'
Fair Value, Measurement with Unobservable Inputs Reconciliation, Liability, Transfers out of Level 3	3	0
Beginning Balance	'	115
Included in earnings	'	-59
Included in other comprehensive income (loss)	'	0
Settlements	'	-46
Ending Balance	'	10
Change in unrealized gains (losses) relating to investments and derivatives still held	'	-8
Investments [Member]	'	'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'	'
Fair Value, Measurement with Unobservable Inputs Reconciliation, Liability, Transfers out of Level 3	0	0
Beginning Balance	39	36
Included in earnings	0	0
Included in other comprehensive income (loss)	'	4
Settlements	0	-1
Ending Balance	0	39
Change in unrealized gains (losses) relating to investments and derivatives still held	$0	$0

Quantitative_Information_about

Quantitative Information about Level 3 Fair Value Measurements (Details) (USD $)	9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014
Fair Value, Option, Quantitative Disclosures [Line Items]	'
Liability Value	($8)
Stockholder Value Appreciation Program [Member]	'
Fair Value, Option, Quantitative Disclosures [Line Items]	'
Liability Value	-7
SBC Expected Volatility Rate, Maximum	37.00%
Natural gas contracts [Member]	'
Fair Value, Option, Quantitative Disclosures [Line Items]	'
Derivative Asset, Fair Value, Total	19
Oil contracts [Member]	'
Fair Value, Option, Quantitative Disclosures [Line Items]	'
Derivative Asset, Fair Value, Total	84
Options Held [Member] | Natural gas contracts [Member]	'
Fair Value, Option, Quantitative Disclosures [Line Items]	'
Derivative Asset, Fair Value, Total	7
Options Held [Member] | Natural gas contracts [Member] | Maximum [Member]	'
Fair Value, Option, Quantitative Disclosures [Line Items]	'
Fair Value Assumptions Expected Volatility Curves	50.03%
Credit Risk	0.64%
Options Held [Member] | Natural gas contracts [Member] | Minimum [Member]	'
Fair Value, Option, Quantitative Disclosures [Line Items]	'
Fair Value Assumptions Expected Volatility Curves	24.78%
Credit Risk	0.01%
Options Held [Member] | Oil contracts [Member]	'
Fair Value, Option, Quantitative Disclosures [Line Items]	'
Derivative Liability, Fair Value, Total	($8)
Options Held [Member] | Oil contracts [Member] | Maximum [Member]	'
Fair Value, Option, Quantitative Disclosures [Line Items]	'
Fair Value Assumptions Expected Volatility Curves	52.12%
Credit Risk	3.95%
Options Held [Member] | Oil contracts [Member] | Minimum [Member]	'
Fair Value, Option, Quantitative Disclosures [Line Items]	'
Fair Value Assumptions Expected Volatility Curves	14.54%
Credit Risk	0.01%

Estimated_Fair_Value_of_Notes_

Estimated Fair Value of Notes Based on Quoted Market Prices (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
5.75% Senior Notes Due 2022 [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Fair value of debt	$836	$767
5.625% Senior Notes Due 2024 [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Fair value of debt	1,072	1,025
7.125% Senior Subordinated Notes due 2018 [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Fair value of debt	615	624
6.875% Senior Subordinated Notes due 2020 [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Fair value of debt	$730	$755

Debt_Details

Debt (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Debt Instrument [Line Items]	'	'	'	'	'
Line of Credit Facility, Amount Outstanding	$0	'	$0	'	$649,000,000
Long-term debt	-3,046,000,000	'	-3,046,000,000	'	-3,694,000,000
Debt (Textuals)	'	'	'	'	'
Line of Credit Facility, Maximum Borrowing Capacity	1,400,000,000	'	1,400,000,000	'	'
Largest individual loan commitment by any lender of total commitments	14.00%	'	14.00%	'	'
Commitment fees incurred	1,000,000	1,000,000	3,000,000	3,000,000	'
Ratio of Indebtedness to Net Capital 1	0.6	'	0.6	'	'
Ratio of total debt to earnings before gain or loss on disposition of assets, interest expense, income taxes and noncash items	3	'	3	'	'
Line of Credit Facility, Current Borrowing Capacity	195,000,000	'	195,000,000	'	'
Percentage of basis points to be added for calculation of interest rate	'	'	0.50%	'	'
Percent added to prime rate based on grid of our debt rating	'	'	0.75%	'	'
Percentage added to LIBOR based on grid of our debt rating	'	'	1.75%	'	'
Commitment fee percentage on unused capacity of line of credit	'	'	0.30%	'	'
Issuance fees percentage on letter of credit	'	'	0.20%	'	'
Percentage based on a grid of our debt rating on which letters of credit fees are based.	'	'	1.75%	'	'
Revolving credit facility - LIBOR based loans	'	'	'	'	'
Debt Instrument [Line Items]	'	'	'	'	'
Line of Credit Facility, Amount Outstanding	0	'	0	'	585,000,000
Money market lines of credit(1)	'	'	'	'	'
Debt Instrument [Line Items]	'	'	'	'	'
Line of Credit Facility, Amount Outstanding	0	'	0	'	64,000,000
5.75% Senior Notes Due 2022 [Member]	'	'	'	'	'
Debt Instrument [Line Items]	'	'	'	'	'
Long-term debt	-750,000,000	'	-750,000,000	'	-750,000,000
Debt Instrument, Interest Rate, Stated Percentage	5.75%	'	5.75%	'	5.75%
5.625% Senior Notes Due 2024 [Member]	'	'	'	'	'
Debt Instrument [Line Items]	'	'	'	'	'
Long-term debt	-1,000,000,000	'	-1,000,000,000	'	-1,000,000,000
Debt Instrument, Interest Rate, Stated Percentage	5.63%	'	5.63%	'	5.63%
Total senior unsecured debt	'	'	'	'	'
Debt Instrument [Line Items]	'	'	'	'	'
Long-term debt	-1,750,000,000	'	-1,750,000,000	'	-2,399,000,000
7.125% Senior Subordinated Notes due 2018 [Member]	'	'	'	'	'
Debt Instrument [Line Items]	'	'	'	'	'
Long-term debt	-600,000,000	'	-600,000,000	'	-600,000,000
Debt Instrument, Interest Rate, Stated Percentage	7.13%	'	7.13%	'	7.13%
6.875% Senior Subordinated Notes due 2020 [Member]	'	'	'	'	'
Debt Instrument [Line Items]	'	'	'	'	'
Long-term debt	-700,000,000	'	-700,000,000	'	-700,000,000
Debt Instrument, Interest Rate, Stated Percentage	6.88%	'	6.88%	'	6.88%
Discount on notes [Member]	'	'	'	'	'
Debt Instrument [Line Items]	'	'	'	'	'
Long-term debt	$4,000,000	'	$4,000,000	'	$5,000,000

Income_Taxes_Details

Income Taxes (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Deferred tax liability:	'	'	'	'	'
Less net current deferred tax liability	$0	'	$0	'	$22
Income tax reconciliation to US federal statutory rate	'	'	'	'	'
Amount computed using the statutory rate	152	-3	156	43	'
Increase (decrease) in taxes resulting from:	'	'	'	'	'
State and local income taxes, net of federal effect	4	1	9	4	'
Total income tax provision (benefit)	$156	($2)	$165	$47	'
Income Taxes (Textuals) [Abstract]	'	'	'	'	'
Federal statutory tax rate	'	'	35.00%	'	'
Effective Income Tax Rate Reconciliation, Percent	35.80%	32.90%	37.00%	38.20%	'

StockBased_Compensation_Detail

Stock-Based Compensation (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, except Share data, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'	'
Share-based Compensation Gross	$8	$25	$100	$49	'
Capitalized in oil and gas properties	-2	7	38	14	'
Net stock-based compensation expense	10	18	62	35	'
Number of restricted stock shares vested	'	'	1,118,000	'	'
Number of Restricted Stock Shares Granted	'	'	721,000	'	'
Number of restricted stock shares outstanding	2,909,000	'	2,909,000	'	3,705,000
Nonvested Awards, Total Compensation Cost Not yet Recognized	96	'	96	'	'
Liability Value	8	'	8	'	'
Liability Settlements	'	'	44	'	'
Stock-Based Compensation (Textuals) [Abstract]	'	'	'	'	'
Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition	'	'	'4 years	'	'
Last reported sales price of our common stock on the New York Stock Exchange per share	$37.07	'	$37.07	'	'
Equity [Member]	'	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'	'
Share-based Compensation Gross	15	12	37	35	'
Stockholder Value Appreciation Program [Member]	'	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'	'
Share-based Compensation Gross	-12	8	42	8	'
Nonvested Awards, Total Compensation Cost Not yet Recognized	5	'	5	'	'
Weighted Average Volatility Rate	'	'	34.00%	'	'
Liability Value	7	'	7	'	'
SVAP Expected Term	'	'	'1 year 3 months	'	'
Fair Value Assumptions, Risk Free Interest Rate	'	'	0.28%	'	'
Total Fair Value SVAP Awards	12	'	12	'	'
Stockholder Value Appreciation Program [Member] | $27.50 [Member]	'	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'	'
SVAP Price Threshold	'	'	$27.50	'	'
Stockholder Value Appreciation Program [Member] | $32.50 [Member]	'	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'	'
SVAP Price Threshold	'	'	$32.50	'	'
Stockholder Value Appreciation Program [Member] | $37.50 [Member]	'	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'	'
SVAP Price Threshold	'	'	$37.50	'	'
Stockholder Value Appreciation Program [Member] | $42.50 [Member]	'	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'	'
SVAP Price Threshold	'	'	$42.50	'	'
Cash-Settled Restricted Stock Units [Member]	'	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'	'
Share-based Compensation Gross	5	5	21	6	'
Vesting Period	'	'	'3 years 0 months 0 days	'	'
Number of restricted stock shares vested	'	'	585,000	83,000	'
Number of Restricted Stock Shares Granted	600,000	'	'	'	'
Number of restricted stock shares outstanding	1,200,000	'	1,200,000	'	'
Fair value of units vested during the period	'	'	19	2	'
Nonvested Awards, Total Compensation Cost Not yet Recognized	31	'	31	'	'
Liability [Member]	'	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'	'
Share-based Compensation Gross	($7)	$13	$63	$14	'

StockBased_Compensation_Stock_

Stock-Based Compensation- Stock Option Activity (Details) (USD $)	9 Months Ended	12 Months Ended
In Millions, except Share data in Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Stock option activity	'	'
Outstanding, Beginning Balance, Number of Shares Underlying Options	687	'
Granted, Number of Shares Underlying Options	0	'
Exercised, Number of Shares Underlying Options	-134	'
Forfeited, Number of Shares Underlying Options	-236	'
Outstanding, Ending Balance, Number of Shares Underlying Options	317	687
Exercisable, Number of Shares Underlying Options	317	'
Outstanding, Beginning Balance, Weighted Average Exercise Price per Share	$39.68	'
Granted, Weighted Average Exercise Price per Share	$0	'
Exercised, Weighted Average Exercise Price per Share	$29.32	'
Forfeited, Weighted Average Exercise Price per Share	$40.22	'
Outstanding, Ending Balance, Weighted Average Exercise Price per Share	$43.64	$39.68
Exercisable, Weighted Average Exercise Price per Share	$43.64	'
Weighted average fair value of each option	$0	'
Outstanding, Beginning Balance, Weighted Average Remaining Contractual Life (In years)	'2 years 4 months	'1 year 11 months
Outstanding, Ending Balance, Weighted Average Remaining Contractual Life (In years)	'2 years 4 months	'1 year 11 months
Exercisable, Weighted Average Remaining Contractual Life (In years)	'2 years 4 months	'
Outstanding, Beginning Balance, Aggregate Intrinsic Value	$0	'
Exercised, Aggregate Intrinsic Value	1	'
Outstanding, Ending Balance, Aggregate Intrinsic Value	0	0
Exercisable, Aggregate Intrinsic Value	$0	'

StockBased_Compensation_Stock_1

Stock-Based Compensation- Stock Option Summary (Details) (USD $)	9 Months Ended	12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'	'
Options Outstanding, Number of Shares Underlying Options	317	687
Options Outstanding, Weighted Average Remaining Contractual Life (In years)	'2 years 4 months	'1 year 11 months
Options Exercisable, Number of Shares Underlying Options	317	'
Options Exercisable, Weighted Average Exercise Price per Share	$43.64	'

StockBased_Compensation_Restri

Stock-Based Compensation- Restricted Stock and Restricted Stock Units Activity (Details) (USD $)	9 Months Ended
	Sep. 30, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Non-vested shares outstanding, Beginning balance	3,705,000
Granted	721,000
Forfeited	-399,000
Vested	-1,118,000
Non-vested shares outstanding, Ending balance	2,909,000
Non-vested shares outstanding, Weighted Average Grant Date Fair Value per Share, Beginning balance	$33.31
Granted, Weighted Average Grant Date Fair Value per Share	$25.24
Forfeited, Weighted Average Grant Date Fair Value per Share	$26
Vested, Weighted Average Grant Date Fair Value per Share	$36.61
Non-vested shares outstanding, Weighted Average Grant Date Fair Value per Share, Ending balance	$30.19
Service - Based Shares [Member]	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Non-vested shares outstanding, Beginning balance	2,999,000
Granted	382,000
Forfeited	-353,000
Vested	-1,088,000
Non-vested shares outstanding, Ending balance	1,940,000
Performance Market Based Shares [Member]	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Non-vested shares outstanding, Beginning balance	706,000
Granted	339,000
Forfeited	-46,000
Vested	-30,000
Non-vested shares outstanding, Ending balance	969,000

StockBased_Compensation_Employ

Stock-Based Compensation- Employee Stock Purchase Plan (Details) (USD $)	9 Months Ended	3 Months Ended	6 Months Ended
	Sep. 30, 2014	Sep. 30, 2014	Jun. 30, 2014
		Employee Stock Purchase Plan [Member]	Employee Stock Purchase Plan [Member]
Employee Stock Purchase Plan ESPP Disclosures [Line Items]	'	'	'
Options To Purchase Common Stock Shares	0	59,000	92,000
Weighted average fair value of each option	$0	$10.28	$5.96
Expected volatility	'	30.00%	34.00%
Risk-free weighted average interest rate	'	0.06%	0.09%
Vesting Period	'	'0 years 6 months 0 days	'0 years 6 months 0 days

Supplemental_Cash_Flows_Inform2

Supplemental Cash Flows Information (Details) (USD $)	9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013
Supplemental Cash Flow Information [Abstract]	'	'
Increase (Decrease) in Other Receivables	($17)	($4)
IncreaseDecreaseInOtherReceivablesOnSaleOfBusiness	-15	0
Non Cash Items Excluded From Statement of Cash Flows [Abstract]	'	'
(Increase) decrease in accrued capital expenditures	2	-55
Increase in asset retirement costs	18	-8
Increase (Decrease) in Other Deposits	($90)	$0

Subsequent_Events_Details

Subsequent Events (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013	Oct. 31, 2014	Sep. 30, 2014	Dec. 31, 2013
In Millions, unless otherwise specified			Subsequent Event [Member]	Senior Subordinated Notes due 2018 [Member]	Senior Subordinated Notes due 2018 [Member]
Subsequent Event [Line Items]	'	'	'	'	'
Long-term Debt, Excluding Current Maturities	$3,046	$3,694	'	$600	$600
Debt Instrument, Interest Rate, Stated Percentage	'	'	'	7.13%	7.13%
Redemption Premium	'	'	$14	'	'