Newfield Exploration (NFX) 10-Q 30 Apr 14 2014 Q1 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information (USD $)	3 Months Ended
	Mar. 31, 2014	Apr. 28, 2014	Jun. 30, 2013
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	31-Mar-14	'	'
Amendment Flag	'false	'	'
Document Fiscal Year Focus	'2014	'	'
Document Fiscal Period Focus	'Q1	'	'
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	'	'	$3,200,000,000
Entity Common Stock, Shares Outstanding	'	136,340,454	'

Consolidated_Balance_Sheet

Consolidated Balance Sheet (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Current assets:	'	'
Cash and cash equivalents	$107	$95
Restricted Cash and Cash Equivalents	0	90
Accounts receivable	384	474
Inventories	41	163
Derivative assets	0	0
Deferred Tax Assets, Net, Current	20	22
Other current assets	35	57
Total current assets	587	901
Property, Plant and Equipment, Gross	15,295	16,407
Less - accumulated depreciation, depletion and amortization	-7,483	-8,306
Capitalized Costs, Oil and Gas Producing Activities, Net	7,812	8,101
Property, Plant and Equipment, Other, Net	176	174
Derivative assets	17	26
Long-term investments	25	63
Deferred taxes	0	19
Other assets	34	37
Total assets	8,651	9,321
Current liabilities:	'	'
Accounts payable	59	76
Accrued liabilities	728	978
Deposit Liability, Current	0	90
Advances from joint owners	16	30
Asset retirement obligations	4	54
Derivative liabilities	108	62
Total current liabilities	915	1,290
Other liabilities	30	38
Derivative liabilities	2	0
Long-term debt	3,046	3,694
Asset retirement obligations	107	201
Deferred taxes	1,301	1,142
Total long-term liabilities	4,486	5,075
Commitments and contingencies	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)	1	1
Additional paid-in capital	1,546	1,539
Treasury stock (at cost)	-10	-13
Accumulated other comprehensive loss	2	2
Retained earnings	1,711	1,427
Total stockholders' equity	3,250	2,956
Total liabilities and stockholders' equity	$8,651	$9,321

Consolidated_Balance_Sheet_Par

Consolidated Balance Sheet (Parenthetical) (USD $)	Mar. 31, 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	$1,365	$1,300
Stockholders' equity:	'	'
Preferred stock ($0.01 par value)	$0.01	$0.01
Preferred stock (5,000,000 shares authorized)	5,000,000	5,000,000
Preferred stock (no shares issued)	0	0
Common stock ($0.01 par value)	$0.01	$0.01
Common stock, shares authorized	200,000,000	200,000,000
Common stock, shares issued	136,692,531	136,682,631
Treasury Stock, shares	365,226	460,914
Commitments and Contingencies	$0	$0

Consolidated_Statement_of_Oper

Consolidated Statement of Operations (USD $)	3 Months Ended
In Millions, except Per Share data, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Earnings Per Share [Abstract]	'	'
Income (Loss) from Continuing Operations, Per Basic Share	$0.17	($0.19)
Income (Loss) from Discontinued Operations, Net of Tax, Per Basic Share	$1.91	$0.13
Earnings (Loss) Per Share, Basic	$2.08	($0.06)
Income (Loss) from Continuing Operations, Per Diluted Share	$0.17	($0.19)
Income (Loss) from Discontinued Operations, Net of Tax, Per Diluted Share	$1.90	$0.13
Earnings (Loss) Per Share, Diluted	$2.07	($0.06)
Operating expenses:	'	'
Depreciation, depletion and amortization	$224	$222
Income tax provision (benefit):	'	'
Current	0	0
Deferred	17	-16
Total income tax provision (benefit)	17	-16
Income (Loss) from Continuing Operations Attributable to Parent	24	-25
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent	260	17
Net income (loss)	284	-8
Other income (expenses):	'	'
Interest expense	-51	-51
Interest Costs Capitalized Adjustment	13	14
Commodity derivative income (expense)	-96	-84
Other	2	2
Total other income (expenses)	-132	-119
Income (loss) before income taxes	41	-41
Weighted-average number of shares outstanding for basic earnings (loss) per share	136	135
Weighted average number of shares outstanding for diluted earnings (loss) per share	137	135
Segment, Continuing Operations [Member]	'	'
Statement [Line Items]	'	'
Oil, gas and NGL revenues	553	370
Operating expenses:	'	'
Lease operating	111	88
Production and other taxes	25	12
Depreciation, depletion and amortization	188	147
General and administrative	56	45
Total operating expenses	380	292
Income (loss) from operations	$173	$78

Consolidated_Statement_of_Comp

Consolidated Statement of Comprehensive Income (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Net Income (Loss) Attributable to Parent [Abstract]	'	'
Net income (loss)	$284	($8)
Other comprehensive income (loss):	'	'
Unrealized gain (loss) on investments, net of tax	0	2
Other Comprehensive Income (Loss), Net of Tax	0	2
Comprehensive income (loss)	$284	($6)

Consolidated_Statement_of_Stoc

Consolidated Statement of Stockholders' Equity (USD $)	3 Months Ended
In Millions, except Share data, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Common Stock, Shares, Issued	136,692,531	136,682,631
Common Stock, Value, Issued	$1	$1
Treasury Stock, Shares	-365,226	-460,914
Treasury Stock, Value	-10	-13
Additional Paid in Capital	1,546	1,539
Retained Earnings (Accumulated Deficit)	1,711	1,427
Accumulated Other Comprehensive Income (Loss), Net of Tax	2	2
Issuances of common stock, value	0	'
Stock-based compensation	11	'
Treasury stock, net, value	1	'
BOP Stockholders' Equity Balance	2,956	'
Net income (loss)	284	'
Other Comprehensive Income (Loss), Net of Tax	0	'
EOP Stockholders' Equity Balance	3,250	'
Common Stock	'	'
Issuances of common stock, shares	0	'
Issuances of common stock, value	0	'
Treasury Stock	'	'
Treasury stock, net, shares	-100,000	'
Treasury stock, net, value	-3	'
Additional Paid-in Capital	'	'
Issuances of common stock, value	0	'
Stock-based compensation	11	'
Treasury stock, net, value	4	'
Retained Earnings	'	'
Net income (loss)	$284	'

Consolidated_Statement_of_Cash

Consolidated Statement of Cash Flows (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Cash flows from operating activities:	'	'
Net income (loss)	$284	($8)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:	'	'
Depreciation, depletion and amortization	224	222
Deferred Income Tax Expense (Benefit), Continuing and Discontinuing Operations	161	-13
Stock-based compensation	11	9
Commodity derivative income	96	84
Cash receipts on derivative settlements, net	-39	27
Gain on sale of malaysia	-388	0
Other non-cash charges	-4	2
Changes in operating assets and liabilities:	'	'
(Increase) decrease in accounts receivable	51	60
(Increase) decrease in inventories	-6	11
(Increase) decrease in other current assets	-7	10
(Increase) decrease in other assets	0	2
Increase (decrease) in accounts payable and accrued liabilities	-6	-55
Increase (decrease) in advances from joint owners	-13	10
Increase (decrease) in other liabilities	1	-2
Net cash provided by operating activities	365	359
Cash flows from investing activities:	'	'
Additions to oil and gas properties	-553	-399
Proceeds from sales of oil and gas properties	10	4
Proceeds from Divestiture of Businesses	809	0
Additions to furniture, fixtures and equipment	-8	-4
Redemptions of investments	39	0
Net cash used in investing activities	297	-399
Cash flows from financing activities:	'	'
Proceeds from borrowings under credit arrangements	562	532
Repayments of borrowings under credit arrangements	-1,211	-532
Purchases of treasury stock, net	-1	-4
Net cash provided by (used in) financing activities	-650	-4
Increase (decrease) in cash and cash equivalents	12	-44
Cash and cash equivalents, beginning of period	95	88
Cash and cash equivalents, end of period	$107	$44

Organization_and_Summary_of_Si

Organization and Summary of Significant Accounting Policies	3 Months Ended
	Mar. 31, 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 on February 10, 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 our derivative positions.
	Reclassifications
	Certain reclassifications have been made to prior years' reported amounts in order to conform to the current year presentation. These reclassifications, including those related to our discontinued operations disclosed in Note 3, "Discontinued Operations," 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 on February 10, 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 $54 million and $50 million of interest and direct internal costs during the three-month periods ended March 31, 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 quarter ended March 31, 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 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	3 Months Ended
	Mar. 31, 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
			March 31,
			2014		2013
			(In millions, except per share data)
	Income (numerator):
	Income (loss) from continuing operations		$	24	$	(25	)
	Income (loss) from discontinued operations, net of tax		260		17
	Net income (loss)		$	284	$	(8	)
	Weighted-average shares (denominator):
	Weighted-average shares — basic		136		135
	Dilution effect of stock options and unvested restricted stock and restricted stock units outstanding at end of period(1) (2)		1		—
	Weighted-average shares — diluted		137		135
	Earnings (loss) per share:
	Basic:
	Income (loss) from continuing operations		$	0.17	$	(0.19	)
	Income (loss) from discontinued operations		1.91		0.13
	Basic earnings (loss) per share		$	2.08	$	(0.06	)
	Diluted:
	Income (loss) from continuing operations		$	0.17	$	(0.19	)
	Income (loss) from discontinued operations		1.9		0.13
	Diluted earnings (loss) per share		$	2.07	$	(0.06	)
	_______
	-1	Excludes 1.5 million shares of unvested restricted stock or restricted stock units and stock options for the three months ended March 31, 2014 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 March 31, 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 0.6 million shares for the three months ended March 31, 2013.

Discontinued_Operations

Discontinued Operations	3 Months Ended
	Mar. 31, 2014
Discontinued Operations and Disposal Groups [Abstract]	'
Disposal Groups, Including Discontinued Operations, Disclosure [Text Block]	'
	Discontinued Operations:
	Malaysia Update
	On February 10, 2014, Newfield International Holding Inc., a wholly-owned subsidiary of the Company, closed the stock purchase agreement to sell our Malaysia business to SapuraKencana Petroleum Berhad, a Malaysian public company, for $898 million (subject to customary purchase price adjustments). We recorded a gain in the first quarter of 2014 of approximately $388 million ($249 million, after tax). As of March 31, 2014, we had accounts receivable of $15 million related to the sale, which we expect to receive in the final post-close settlement scheduled to occur in the second quarter of 2014.
	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. We are now in the process of completing our underwater inspections of the jacket to assess the extent of the damage. Plans are underway to repair the damage to the jacket mid-year 2014, and we plan to install the LF-7 topside facilities in the third quarter of 2014. We expect to achieve first oil production in late 2014. We continue to pursue the sale of our China business. After reevaluating the criteria to be classified as discontinued operations, we believe that our China operations continue to meet the "held-for-sale" criteria and therefore remain in discontinued operations as of March 31, 2014. We will continue to monitor the facts and circumstances surrounding the completion of the production facilities and the continued classification of our China business as discontinued operations.
	Income from discontinued operations from our China business was $9 million ($3 million, net of tax) for the three months ended March 31, 2014. Income from discontinued operations from our China business was $13 million ($4 million, net of tax) for the three months ended March 31, 2013.
	Financial Results of Discontinued Operations
			Three Months Ended
			March 31,
			2014		2013
			(In millions)
	Oil and gas revenues(1)		$	108	$	281
	Operating expenses		78		213
	Income from discontinued operations		30		68
	Gain on sale of Malaysia business		388		—
	Income from discontinued operations before income taxes		418		68
	Income tax provision (benefit):
	Current		14		48
	Deferred		144		3
	Total income tax provision (benefit)		158		51
	Income from discontinued operations, net of tax		$	260	$	17
	________________
	-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 are fully divested of our international businesses. The effective tax rate for our discontinued operations for the three months ended March 31, 2014 was 37.9% as the majority of our income 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 March 31, 2013 was 74.8% due to our international earnings being taxed both in the U.S and the local country.
	Assets and Liabilities in the Consolidated Balance Sheet Attributable to Discontinued Operations
			March 31,		December 31,
			2014		2013
			(In millions)
	Current assets:
	Cash and cash equivalents		$	34	$	84
	Accounts receivable		61		200
	Inventories		11		130
	Other current assets		9		33
	Total current assets		115		447
	Noncurrent assets:
	Oil and gas properties, net of accumulated depreciation, depletion and amortization of $115 and $1,121 as of March 31, 2014 and December 31, 2013, respectively		455		989
	Deferred taxes		—		19
	Other assets		1		4
	Total noncurrent assets		456		1,012
	Total assets		$	571	$	1,459
	Current liabilities:
	Accounts payable		$	5	$	38
	Accrued liabilities		132		324
	Asset retirement obligations		—		49
	Other current liabilities		—		18
	Total current liabilities		137		429
	Noncurrent liabilities:
	Asset retirement obligations		2		86
	Deferred taxes		104		129
	Other liabilities		—		11
	Total noncurrent liabilities		106		226
	Total liabilities		$	243	$	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 production costs and depletion expense. The sale of our Malaysia business on February 10, 2014, reduced crude oil inventory to a de minimis amount. Remaining inventories at March 31, 2014, primarily consisted of tubular goods and well equipment for use in our oil and natural gas operations.
	Oil and Gas Properties
	As of March 31, 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 oil and gas properties in our discontinued operations were not subject to amortization.
	Asset Retirement Obligations
	During the quarter ended March 31, 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	3 Months Ended
	Mar. 31, 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:
		March 31,			December 31,
		2014			2013
		(In millions)
	Oil and gas properties:
	Subject to amortization	$	13,930		$	15,107
	Not subject to amortization	1,365			1,300
	Gross oil and gas properties	15,295			16,407
	Accumulated depreciation, depletion and amortization	(7,483		)	(8,306		)
	Net oil and gas properties	$	7,812		$	8,101
	Other property and equipment:
	Furniture, fixtures and equipment	141			139
	Gathering systems and equipment	108			104
	Accumulated depreciation and amortization	(73		)	(69		)
	Net other property and equipment	$	176		$	174
	At March 31, 2014, approximately 91% of our oil and gas properties not subject to amortization were associated with unconventional resource plays. Because of the size of our unconventional resource plays, the entire evaluation can take significantly longer than four years. The following is a summary of our oil and gas properties not subject to amortization as of March 31, 2014.
		Costs Incurred In
		2014			2013			2012		2011 and Prior		Total
		(In millions)
	Acquisition costs	$	28		$	199		$	109	$	474	$	810
	Exploration costs	159			114			2		10		285
	Development costs	11			12			31		24		78
	Fee mineral interests	—			1			—		23		24
	Capitalized interest	13			53			67		35		168
	Total oil and gas properties not subject to amortization	$	211		$	379		$	209	$	566	$	1,365

Derivative_Financial_Instrumen

Derivative Financial Instruments	3 Months Ended
	Mar. 31, 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.
	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 collars, sold puts and swaptions requires the use of an option-pricing model. See Note 8, “Fair Value Measurements.”
	At March 31, 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		64,625			$	3.98			—			—				—				$	(30	)
	Collars		17,875			—				—			$	3.75			$	4.62			(3		)
	2015:00:00
	Fixed-price swaps		49,275			4.28				—			—				—				4
	Collars		38,325			—				—			3.93				4.74				1
	Total																				$	(28	)
	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		5,777			$	89.96			—				—				—				$	(44	)
	Fixed-price swaps with sold puts		4,400			95.16				$	75			—				—				(13		)
	Collars with sold puts		1,650			—				75.83				$	90.83			$	102.93			(1		)
	2015:00:00
	Fixed-price swaps		6,567			90.39				—				—				—				2
	Fixed-price swaps with sold puts		6,621			90.13				69.17				—				—				(6		)
	Swaptions(1)		—			90.29				—				—				—				(4		)
	2016:00:00
	Fixed-price swaps with sold puts		637			90.02				70				—				—				1
	Total																					$	(65	)
	________
	-1	During the first quarter of 2014, we sold crude oil swaption contracts (options to exercise swap contracts) to counterparties that would potentially put 1,548 MBbls of oil under contract for calendar year 2015 if exercised on their expiration date in the second quarter of 2014. These contracts give the counterparties the option to enter into swap contracts with us at a weighted-average fixed price of $90.29 per barrel for the first three quarters of calendar year 2015.
	Additional Disclosures about Derivative 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
	March 31, 2014		(In millions)																(In millions)
	Natural gas positions		$	12			$	—			$	—			$	12			$	(40	)		$	—	$	(40	)	$	—
	Oil positions		15				(10		)		—				5				(80		)		10		(68		)	(2		)
	Total		$	27			$	(10	)		$	—			$	17			$	(120	)		$	10	$	(108	)	$	(2	)
	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
			March 31,
			2014				2013
			(In millions)
	Derivatives not designated as hedging instruments:
	Realized gain (loss) on natural gas positions		$	(22	)		$	27
	Realized gain (loss) on oil positions		(17		)		—
	Total realized gain (loss)(1)		(39		)		27
	Unrealized gain (loss) on natural gas positions		(17		)		(88		)
	Unrealized gain (loss) on oil positions		(40		)		(23		)
	Total unrealized gain (loss)		(57		)		(111		)
	Total		$	(96	)		$	(84	)
	________
-1	The total realized gain (loss) on commodity derivatives may differ from the cash receipts on derivative settlements as a result of the receipt or payment of premiums or due to the recognition of premiums previously received associated with derivatives settled during the period.
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 March 31, 2014, ten 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	3 Months Ended
	Mar. 31, 2014
Accounts Receivable, Net, Current [Abstract]	'
Accounts Receivable Text Block	'
	Accounts Receivable:
	Accounts receivable consisted of the following:
		March 31,			December 31,
		2014			2013
		(In millions)
	Revenue	$	222		$	294
	Joint interest	126			156
	Other	37			25
	Reserve for doubtful accounts	(1		)	(1		)
	Total accounts receivable	$	384		$	474

Accrued_Liabilities

Accrued Liabilities	3 Months Ended
	Mar. 31, 2014
Accrued Liabilities, Current [Abstract]	'
Accrued Liabilities Text Block	'
	Accrued Liabilities:
	Accrued liabilities consisted of the following:
		March 31,		December 31,
		2014		2013
		(In millions)
	Revenue payable	$	187	$	175
	Accrued capital costs	365		458
	Accrued lease operating expenses	27		71
	Employee incentive expense	35		64
	Accrued interest on debt	46		72
	Taxes payable	29		93
	Other	39		45
	Total accrued liabilities	$	728	$	978

Fair_Value_Measurements

Fair Value Measurements	3 Months Ended
	Mar. 31, 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 (price collars, sold puts and 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 March 31, 2014:
	Money market fund investments		$	74		$	—		$	—			$	74
	Deferred compensation plan assets		9			—			—				9
	Equity securities available-for-sale		8			—			—				8
	Oil and gas derivative swap contracts		—			(74		)	—				(74		)
	Oil and gas derivative option contracts		—			—			(19		)		(19		)
	Stock-based compensation liability awards		(10		)	—			(19		)		(29		)
	Total		$	81		$	(74	)	$	(38	)		$	(31	)
	The determination of the fair values above incorporates various factors, which 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), 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 quarter ended March 31, 2014, we sold all auction rate securities that we held at December 31, 2013, 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		—			(27		)	—				(27		)
	Included in other comprehensive income (loss)		3			—			—				3
	Purchases, issuances and settlements:
	Settlements		—			(18		)	—				(18		)
	Transfers in and out of Level 3		—			—			—				—
	Balance at March 31, 2013		$	39		$	70		$	—			$	109
	Change in unrealized gains or losses included in earnings relating to Level 3 instruments still held at March 31, 2013		$	—		$	(5	)	$	—			$	(5	)
	Balance at January 1, 2014		$	39		$	(8	)	$	(5	)		$	26
	Realized or unrealized gains (losses) included in earnings		—			(13		)	(14		)		(27		)
	Purchases, issuances and settlements:
	Settlements		(39		)	2			—				(37		)
	Transfers in and out of Level 3		—			—			—				—
	Balance at March 31, 2014		$	—		$	(19	)	$	(19	)		$	(38	)
	Change in unrealized gains or losses included in earnings relating to Level 3 instruments still held at March 31, 2014		$	—		$	(11	)	$	(14	)		$	(25	)
	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 return 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		$	(17	)	Black-Scholes		Oil price volatility curves	14.42	%		—		53.09	%
								Credit risk	0.01	%		—		1.33	%
Natural gas option contracts		$	(2	)	Black-Scholes		Natural gas price volatility curves	19.33	%		—		49.56	%
							Credit risk	0.01	%		—		1.15	%
SVAP		$	(19	)	Monte Carlo		Implied volatility						38	%
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:
		March 31,			December 31,
		2014			2013
		(In millions)
5¾% Senior Notes due 2022		$	804		$	767
5⅝% Senior Notes due 2024		1,065			1,025
7⅛% Senior Subordinated Notes due 2018		618			624
6⅞% Senior Subordinated Notes due 2020		742			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	3 Months Ended
	Mar. 31, 2014
Debt Disclosure [Abstract]	'
Debt Text Block	'
	Debt:
	Our debt consisted of the following:
		March 31,			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	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.
	Credit Arrangements
	We have a revolving credit facility that matures in June 2018 and provides borrowing capacity of $1.4 billion. As of March 31, 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 March 31, 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 March 31, 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 March 31, 2014). We incurred aggregate commitment fees under our current credit facility of approximately $1 million for the each of the three-month periods ended March 31, 2014 and 2013, which are recorded in “Interest expense” on our consolidated statement of operations.
	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 March 31, 2014, we were in compliance with all of our debt covenants.
	As of March 31, 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 March 31, 2014).
	Subject to compliance with the restrictive covenants in our credit facility, at March 31, 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 hedging arrangements contain provisions that provide for cross defaults and acceleration of those debt and hedging instruments in certain situations.

Income_Taxes

Income Taxes	3 Months Ended
	Mar. 31, 2014
Income Tax Disclosure [Abstract]	'
Income Taxes Text Block	'
	Income Taxes:
	The provision 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
		March 31,
		2014		2013
		(In millions)
	Amount computed using the statutory rate	$	14	$	(14	)
	Increase (decrease) in taxes resulting from:
	State and local income taxes, net of federal effect	3		(2		)
	Total provision (benefit) for income taxes	$	17	$	(16	)
	The effective tax rates for continuing operations for the three months ended March 31, 2014 and 2013 were 42.4% and 38.5%, respectively. Unrealized derivative gains and losses are treated differently 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 March 31, 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 2010 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	3 Months Ended
	Mar. 31, 2014
Share-based Compensation [Abstract]	'
Stock-Based Compensation Text Block	'
	Stock-Based Compensation:
	Our stock-based compensation consisted of the following:
			Three Months Ended
			March 31,
			2014				2013
			(In millions)
	Equity awards		$	11			$	12
	Liability awards		20				—
	Total stock-based compensation		31				12
	Capitalized in oil and gas properties		(14		)		(3		)
	Net stock-based compensation expense		$	17			$	9
	As of March 31, 2014, we had approximately $115 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		177			339			516			20.57
	Forfeited		(132	)		(22	)		(154	)		32.85
	Vested		(142	)		—			(142	)		61.24
	Non-vested shares outstanding at March 31, 2014		2,902			1,023			3,925			$	30.72
	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		(10	)		24.07									—
	Forfeited		(102	)		29.98
	Outstanding at March 31, 2014		575			$	41.67							1.8	$	—
	Exercisable at March 31, 2014		575			$	41.67							1.8	$	—
	________
	-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 March 31, 2014, the last reported sales price of our common stock on the New York Stock Exchange was $31.36 per share.
	Employee Stock Purchase Plan. On January 1, 2014, options to purchase approximately 90,000 shares of our common stock were issued under our employee stock purchase plan. 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%.
	Liability Awards
	Liability awards consist of cash-based performance awards under the Stockholder Value Appreciation Program (SVAP) and cash-settled restricted stock units.
	Stockholder Value Appreciation Program. In September 2013, the Compensation and Management Development Committee of the Board approved the Stockholder Value Appreciation Program, to be administered under the 2011 Omnibus Stock 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. The first price threshold that would trigger a payment under the SVAP was $27.50, which was reached during the fourth quarter of 2013. Each price threshold can be reached only once during the term of the program. The SVAP's performance period lasts through December 31, 2015.
	Based upon the expected duration of the SVAP performance period, which lasts through December 31, 2015, the expected remaining payout is $34 million, of which $19 million has been accrued as of March 31, 2014. The total expected cost was determined using a Monte Carlo simulation assuming no dividends, a risk-free weighted-average interest rate of 0.32%, an expected life of 1.75 years and an average of implied and historical stock price volatility of 37%. As of March 31, 2014, we had unrecognized stock-based compensation expense of approximately $15 million for the SVAP.
	Cash-Settled Restricted Stock Units. We also grant 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. During the three months ended March 31, 2014, approximately 283,000 cash-settled restricted stock units vested and settled for approximately $7 million. During the three months ended March 31, 2013, approximately 38,000 cash-settled restricted stock units vested and settled for approximately $1 million. As of March 31, 2014, we had approximately 1.0 million cash-settled restricted stock units outstanding and related unrecognized stock-based compensation expense of approximately $18 million.

Commitments_and_Contingencies

Commitments and Contingencies	3 Months Ended
	Mar. 31, 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 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 positions, cash flows or results of operations.

Supplemental_Cash_Flows_Inform

Supplemental Cash Flows Information	3 Months Ended
	Mar. 31, 2014
Supplemental Cash Flow Information [Abstract]	'
Supplemental Cash Flows Information Text Block	'
	Supplemental Cash Flows Information:
	The following table presents information about supplemental cash flows for the following periods:
		Three Months Ended
		March 31,
		2014			2013
		(In millions)
	Non-cash items excluded from the statement of cash flows:
	(Increase) decrease in receivables for property sales	$	—		$	15
	(Increase) decrease in receivables from sale of Malaysia business	(15		)	—
	(Increase) decrease in accrued capital expenditures	90			(8		)
	(Increase) decrease in asset retirement costs	13			(4		)
	Increase (decrease) in deferred liabilities	(90		)	—

Related_Party_Transactions

Related Party Transactions	3 Months Ended
	Mar. 31, 2014
Related Party Transactions [Abstract]	'
Related Party Transaction Text Block	'
	Related-Party Transactions:
	Kevin M. Robinson, our Vice President — Asia through February 10, 2014, and Susan G. Riggs, our Treasurer, are 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.

Organization_and_Summary_of_Si1

Organization and Summary of Significant Accounting Policies (Policies)	3 Months Ended
	Mar. 31, 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 on February 10, 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 our derivative positions.
Reclassifications	'
	Reclassifications
	Certain reclassifications have been made to prior years' reported amounts in order to conform to the current year presentation. These reclassifications, including those related to our discontinued operations disclosed in Note 3, "Discontinued Operations," 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 on February 10, 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 $54 million and $50 million of interest and direct internal costs during the three-month periods ended March 31, 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 quarter ended March 31, 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 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)	3 Months Ended
	Mar. 31, 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
			March 31,
			2014		2013
			(In millions, except per share data)
	Income (numerator):
	Income (loss) from continuing operations		$	24	$	(25	)
	Income (loss) from discontinued operations, net of tax		260		17
	Net income (loss)		$	284	$	(8	)
	Weighted-average shares (denominator):
	Weighted-average shares — basic		136		135
	Dilution effect of stock options and unvested restricted stock and restricted stock units outstanding at end of period(1) (2)		1		—
	Weighted-average shares — diluted		137		135
	Earnings (loss) per share:
	Basic:
	Income (loss) from continuing operations		$	0.17	$	(0.19	)
	Income (loss) from discontinued operations		1.91		0.13
	Basic earnings (loss) per share		$	2.08	$	(0.06	)
	Diluted:
	Income (loss) from continuing operations		$	0.17	$	(0.19	)
	Income (loss) from discontinued operations		1.9		0.13
	Diluted earnings (loss) per share		$	2.07	$	(0.06	)
	_______
	-1	Excludes 1.5 million shares of unvested restricted stock or restricted stock units and stock options for the three months ended March 31, 2014 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 March 31, 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 0.6 million shares for the three months ended March 31, 2013.

Discontinued_Operations_Tables

Discontinued Operations (Tables)	3 Months Ended
	Mar. 31, 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
			March 31,
			2014		2013
			(In millions)
	Oil and gas revenues(1)		$	108	$	281
	Operating expenses		78		213
	Income from discontinued operations		30		68
	Gain on sale of Malaysia business		388		—
	Income from discontinued operations before income taxes		418		68
	Income tax provision (benefit):
	Current		14		48
	Deferred		144		3
	Total income tax provision (benefit)		158		51
	Income from discontinued operations, net of tax		$	260	$	17
	________________
	-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]	'
			March 31,		December 31,
			2014		2013
			(In millions)
	Current assets:
	Cash and cash equivalents		$	34	$	84
	Accounts receivable		61		200
	Inventories		11		130
	Other current assets		9		33
	Total current assets		115		447
	Noncurrent assets:
	Oil and gas properties, net of accumulated depreciation, depletion and amortization of $115 and $1,121 as of March 31, 2014 and December 31, 2013, respectively		455		989
	Deferred taxes		—		19
	Other assets		1		4
	Total noncurrent assets		456		1,012
	Total assets		$	571	$	1,459
	Current liabilities:
	Accounts payable		$	5	$	38
	Accrued liabilities		132		324
	Asset retirement obligations		—		49
	Other current liabilities		—		18
	Total current liabilities		137		429
	Noncurrent liabilities:
	Asset retirement obligations		2		86
	Deferred taxes		104		129
	Other liabilities		—		11
	Total noncurrent liabilities		106		226
	Total liabilities		$	243	$	655

Oil_and_Gas_Assets_Tables

Oil and Gas Assets (Tables)	3 Months Ended
	Mar. 31, 2014
Oil and Gas Property [Abstract]	'
Costs incurred by year for oil and gas properties not subject to amortization	'
		Costs Incurred In
		2014			2013			2012		2011 and Prior		Total
		(In millions)
	Acquisition costs	$	28		$	199		$	109	$	474	$	810
	Exploration costs	159			114			2		10		285
	Development costs	11			12			31		24		78
	Fee mineral interests	—			1			—		23		24
	Capitalized interest	13			53			67		35		168
	Total oil and gas properties not subject to amortization	$	211		$	379		$	209	$	566	$	1,365
Capitalized Costs Relating to Oil and Gas Producing Activities and Other PPE [Table Text Block]	'
	Property and equipment consisted of the following:
		March 31,			December 31,
		2014			2013
		(In millions)
	Oil and gas properties:
	Subject to amortization	$	13,930		$	15,107
	Not subject to amortization	1,365			1,300
	Gross oil and gas properties	15,295			16,407
	Accumulated depreciation, depletion and amortization	(7,483		)	(8,306		)
	Net oil and gas properties	$	7,812		$	8,101
	Other property and equipment:
	Furniture, fixtures and equipment	141			139
	Gathering systems and equipment	108			104
	Accumulated depreciation and amortization	(73		)	(69		)
	Net other property and equipment	$	176		$	174

Derivative_Financial_Instrumen1

Derivative Financial Instruments (Tables)	3 Months Ended
	Mar. 31, 2014
Derivative Instruments and Hedges, Assets [Abstract]	'
Outstanding contracts that are not designated for hedge accounting	'
	At March 31, 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		64,625			$	3.98			—			—				—				$	(30	)
	Collars		17,875			—				—			$	3.75			$	4.62			(3		)
	2015:00:00
	Fixed-price swaps		49,275			4.28				—			—				—				4
	Collars		38,325			—				—			3.93				4.74				1
	Total																				$	(28	)
	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		5,777			$	89.96			—				—				—				$	(44	)
	Fixed-price swaps with sold puts		4,400			95.16				$	75			—				—				(13		)
	Collars with sold puts		1,650			—				75.83				$	90.83			$	102.93			(1		)
	2015:00:00
	Fixed-price swaps		6,567			90.39				—				—				—				2
	Fixed-price swaps with sold puts		6,621			90.13				69.17				—				—				(6		)
	Swaptions(1)		—			90.29				—				—				—				(4		)
	2016:00:00
	Fixed-price swaps with sold puts		637			90.02				70				—				—				1
	Total																					$	(65	)
	________
	-1	During the first quarter of 2014, we sold crude oil swaption contracts (options to exercise swap contracts) to counterparties that would potentially put 1,548 MBbls of oil under contract for calendar year 2015 if exercised on their expiration date in the second quarter of 2014. These contracts give the counterparties the option to enter into swap contracts with us at a weighted-average fixed price of $90.29 per barrel for the first three quarters of calendar year 2015.
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
	March 31, 2014		(In millions)																(In millions)
	Natural gas positions		$	12			$	—			$	—			$	12			$	(40	)		$	—	$	(40	)	$	—
	Oil positions		15				(10		)		—				5				(80		)		10		(68		)	(2		)
	Total		$	27			$	(10	)		$	—			$	17			$	(120	)		$	10	$	(108	)	$	(2	)
	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.
	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 collars, sold puts and swaptions requires the use of an option-pricing model. See Note 8, “Fair Value Measurements.”
	At March 31, 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		64,625			$	3.98			—			—				—				$	(30	)
	Collars		17,875			—				—			$	3.75			$	4.62			(3		)
	2015:00:00
	Fixed-price swaps		49,275			4.28				—			—				—				4
	Collars		38,325			—				—			3.93				4.74				1
	Total																				$	(28	)
	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		5,777			$	89.96			—				—				—				$	(44	)
	Fixed-price swaps with sold puts		4,400			95.16				$	75			—				—				(13		)
	Collars with sold puts		1,650			—				75.83				$	90.83			$	102.93			(1		)
	2015:00:00
	Fixed-price swaps		6,567			90.39				—				—				—				2
	Fixed-price swaps with sold puts		6,621			90.13				69.17				—				—				(6		)
	Swaptions(1)		—			90.29				—				—				—				(4		)
	2016:00:00
	Fixed-price swaps with sold puts		637			90.02				70				—				—				1
	Total																					$	(65	)
	________
	-1	During the first quarter of 2014, we sold crude oil swaption contracts (options to exercise swap contracts) to counterparties that would potentially put 1,548 MBbls of oil under contract for calendar year 2015 if exercised on their expiration date in the second quarter of 2014. These contracts give the counterparties the option to enter into swap contracts with us at a weighted-average fixed price of $90.29 per barrel for the first three quarters of calendar year 2015.
	Additional Disclosures about Derivative 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
	March 31, 2014		(In millions)																(In millions)
	Natural gas positions		$	12			$	—			$	—			$	12			$	(40	)		$	—	$	(40	)	$	—
	Oil positions		15				(10		)		—				5				(80		)		10		(68		)	(2		)
	Total		$	27			$	(10	)		$	—			$	17			$	(120	)		$	10	$	(108	)	$	(2	)
	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
			March 31,
			2014				2013
			(In millions)
	Derivatives not designated as hedging instruments:
	Realized gain (loss) on natural gas positions		$	(22	)		$	27
	Realized gain (loss) on oil positions		(17		)		—
	Total realized gain (loss)(1)		(39		)		27
	Unrealized gain (loss) on natural gas positions		(17		)		(88		)
	Unrealized gain (loss) on oil positions		(40		)		(23		)
	Total unrealized gain (loss)		(57		)		(111		)
	Total		$	(96	)		$	(84	)
	________
-1	The total realized gain (loss) on commodity derivatives may differ from the cash receipts on derivative settlements as a result of the receipt or payment of premiums or due to the recognition of premiums previously received associated with derivatives settled during the period.
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 March 31, 2014, ten 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
			March 31,
			2014				2013
			(In millions)
	Derivatives not designated as hedging instruments:
	Realized gain (loss) on natural gas positions		$	(22	)		$	27
	Realized gain (loss) on oil positions		(17		)		—
	Total realized gain (loss)(1)		(39		)		27
	Unrealized gain (loss) on natural gas positions		(17		)		(88		)
	Unrealized gain (loss) on oil positions		(40		)		(23		)
	Total unrealized gain (loss)		(57		)		(111		)
	Total		$	(96	)		$	(84	)
	________
	-1	The total realized gain (loss) on commodity derivatives may differ from the cash receipts on derivative settlements as a result of the receipt or payment of premiums or due to the recognition of premiums previously received associated with derivatives settled during the period.

Accounts_Receivable_Tables

Accounts Receivable (Tables)	3 Months Ended
	Mar. 31, 2014
Accounts Receivable, Net, Current [Abstract]	'
Accounts Receivable	'
	Accounts receivable consisted of the following:
		March 31,			December 31,
		2014			2013
		(In millions)
	Revenue	$	222		$	294
	Joint interest	126			156
	Other	37			25
	Reserve for doubtful accounts	(1		)	(1		)
	Total accounts receivable	$	384		$	474

Accrued_Liabilities_Tables

Accrued Liabilities (Tables)	3 Months Ended
	Mar. 31, 2014
Accrued Liabilities, Current [Abstract]	'
Accrued Liabilities	'
	Accrued liabilities consisted of the following:
		March 31,		December 31,
		2014		2013
		(In millions)
	Revenue payable	$	187	$	175
	Accrued capital costs	365		458
	Accrued lease operating expenses	27		71
	Employee incentive expense	35		64
	Accrued interest on debt	46		72
	Taxes payable	29		93
	Other	39		45
	Total accrued liabilities	$	728	$	978

Fair_Value_Measurements_Tables

Fair Value Measurements (Tables)	3 Months Ended
	Mar. 31, 2014
Table Text Block Supplement [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 March 31, 2014:
	Money market fund investments	$	74		$	—		$	—			$	74
	Deferred compensation plan assets	9			—			—				9
	Equity securities available-for-sale	8			—			—				8
	Oil and gas derivative swap contracts	—			(74		)	—				(74		)
	Oil and gas derivative option contracts	—			—			(19		)		(19		)
	Stock-based compensation liability awards	(10		)	—			(19		)		(29		)
	Total	$	81		$	(74	)	$	(38	)		$	(31	)
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	—			(27		)	—				(27		)
	Included in other comprehensive income (loss)	3			—			—				3
	Purchases, issuances and settlements:
	Settlements	—			(18		)	—				(18		)
	Transfers in and out of Level 3	—			—			—				—
	Balance at March 31, 2013	$	39		$	70		$	—			$	109
	Change in unrealized gains or losses included in earnings relating to Level 3 instruments still held at March 31, 2013	$	—		$	(5	)	$	—			$	(5	)
	Balance at January 1, 2014	$	39		$	(8	)	$	(5	)		$	26
	Realized or unrealized gains (losses) included in earnings	—			(13		)	(14		)		(27		)
	Purchases, issuances and settlements:
	Settlements	(39		)	2			—				(37		)
	Transfers in and out of Level 3	—			—			—				—
	Balance at March 31, 2014	$	—		$	(19	)	$	(19	)		$	(38	)
	Change in unrealized gains or losses included in earnings relating to Level 3 instruments still held at March 31, 2014	$	—		$	(11	)	$	(14	)		$	(25	)
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	$	(17	)	Black-Scholes		Oil price volatility curves	14.42	%		—		53.09	%
							Credit risk	0.01	%		—		1.33	%
	Natural gas option contracts	$	(2	)	Black-Scholes		Natural gas price volatility curves	19.33	%		—		49.56	%
							Credit risk	0.01	%		—		1.15	%
	SVAP	$	(19	)	Monte Carlo		Implied volatility						38	%
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:
		March 31,			December 31,
		2014			2013
		(In millions)
	5¾% Senior Notes due 2022	$	804		$	767
	5⅝% Senior Notes due 2024	1,065			1,025
	7⅛% Senior Subordinated Notes due 2018	618			624
	6⅞% Senior Subordinated Notes due 2020	742			755

Debt_Tables

Debt (Tables)	3 Months Ended
	Mar. 31, 2014
Debt Instruments [Abstract]	'
Debt	'
	Our debt consisted of the following:
		March 31,			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	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.

Income_Taxes_Tables

Income Taxes (Tables)	3 Months Ended
	Mar. 31, 2014
Income Tax Disclosure [Abstract]	'
Provision for income taxes using federal statutory rate	'
	The provision 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
		March 31,
		2014		2013
		(In millions)
	Amount computed using the statutory rate	$	14	$	(14	)
	Increase (decrease) in taxes resulting from:
	State and local income taxes, net of federal effect	3		(2		)
	Total provision (benefit) for income taxes	$	17	$	(16	)

StockBased_Compensation_Tables

Stock-Based Compensation (Tables)	3 Months Ended
	Mar. 31, 2014
Share-based Compensation [Abstract]	'
Schedule of Stock Based Compensation Expense Table	'
	Our stock-based compensation consisted of the following:
			Three Months Ended
			March 31,
			2014				2013
			(In millions)
	Equity awards		$	11			$	12
	Liability awards		20				—
	Total stock-based compensation		31				12
	Capitalized in oil and gas properties		(14		)		(3		)
	Net stock-based compensation expense		$	17			$	9
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		(10	)		24.07									—
	Forfeited		(102	)		29.98
	Outstanding at March 31, 2014		575			$	41.67							1.8	$	—
	Exercisable at March 31, 2014		575			$	41.67							1.8	$	—
	________
	-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		177			339			516			20.57
	Forfeited		(132	)		(22	)		(154	)		32.85
	Vested		(142	)		—			(142	)		61.24
	Non-vested shares outstanding at March 31, 2014		2,902			1,023			3,925			$	30.72

Supplemental_Cash_Flows_Inform1

Supplemental Cash Flows Information (Tables)	3 Months Ended
	Mar. 31, 2014
Supplemental Cash Flow Information [Abstract]	'
Supplemental Cash Flows Information Schedule (Table)	'
	The following table presents information about supplemental cash flows for the following periods:
		Three Months Ended
		March 31,
		2014			2013
		(In millions)
	Non-cash items excluded from the statement of cash flows:
	(Increase) decrease in receivables for property sales	$	—		$	15
	(Increase) decrease in receivables from sale of Malaysia business	(15		)	—
	(Increase) decrease in accrued capital expenditures	90			(8		)
	(Increase) decrease in asset retirement costs	13			(4		)
	Increase (decrease) in deferred liabilities	(90		)	—

Organization_and_Summary_of_Si2

Organization and Summary of Significant Accounting Policies (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
			MBbls
Change in ARO (asset retirement obligation)	'	'	'
Less: Current portion of ARO	($4)	'	($54)
Total long-term ARO	107	'	201
Organization and Summary of Significant Accounting Policies (Textuals) [Abstract]	'	'	'
Crude oil inventory (in barrels)	'	'	1,100
Crude oil inventory	'	'	90
Capitalization of internal costs per full cost method of accounting	54	50	'
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	$388	$0	'

Earnings_Per_Share_Details

Earnings Per Share (Details) (USD $)	3 Months Ended
In Millions, except Per Share data, unless otherwise specified	Mar. 31, 2014	Sep. 30, 2013	Mar. 31, 2013
Income (numerator):	'	'	'
Income (Loss) from Continuing Operations Attributable to Parent	$24	'	($25)
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent	260	'	17
Net income (loss)	284	'	-8
Weighted average shares (denominator):	'	'	'
Weighted average shares - basic	136	'	135
Dilution effect of stock options and unvested restricted stock and restricted stock units outstanding at end of period	1	'	0
Weighted average shares - diluted	137	'	135
Basic --	'	'	'
Income (Loss) from Continuing Operations, Per Basic Share	$0.17	'	($0.19)
Income (Loss) from Discontinued Operations, Net of Tax, Per Basic Share	$1.91	'	$0.13
Earnings (Loss) Per Share, Basic	$2.08	'	($0.06)
Diluted --	'	'	'
Income (Loss) from Continuing Operations, Per Diluted Share	$0.17	'	($0.19)
Income (Loss) from Discontinued Operations, Net of Tax, Per Diluted Share	$1.90	'	$0.13
Earnings (Loss) Per Share, Diluted	$2.07	'	($0.06)
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	1.5	'	0.6
Payments for Repurchase of Preferred Stock and Preference Stock	'	$20	'

Discontinued_Operations_Detail

Discontinued Operations (Details) (USD $)	3 Months Ended		12 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
			MBbls
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]	'	'	'
Purchase Price on Disposal of Business	$898	'	'
Gain on Sale of Malaysia, before Income Tax	388	0	'
Gain on Sale of Malaysia, Net of Tax	249	'	'
DiscontinuedOperationReceivableFromDisposalofDiscontinuedOperation	15	'	'
Disposal Group, Including Discontinued Operation, Operating Income (Loss)	30	68	'
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent	260	17	'
Discontinued Operation, Tax Effect of Discontinued Operation	158	51	'
Historical Effective Tax Rate, Discontinuing Operations	'	'	37.00%
Effective Income Tax Rate, Discontinuing Operations	37.90%	74.80%	'
Not subject to amortization	'	'	115
Disposal Group, Including Discontinued Operation, Revenue	108	281	'
Disposal Group, Including Discontinued Operation, Operating Expense	78	213	'
Disposal Group, Including Discontinued Operation, Operating Income (Loss)	30	68	'
Discontinued Operation, Gain (Loss) from Disposal of Discontinued Operation, before Income Tax	388	0	'
Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax	418	68	'
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent	260	17	'
Disposal Group, Including Discontinued Operation, Cash and Cash Equivalents	34	'	84
Disposal Group, Including Discontinued Operation, Accounts, Notes and Loans Receivable, Net	61	'	200
Disposal Group, Including Discontinued Operation, Inventory	11	'	130
Disposal Group, Including Discontinued Operation, Other Current Assets	9	'	33
Assets of Disposal Group, Including Discontinued Operation, Current	115	'	447
Disposal Group, including Discontinued Operations, Oil and Gas Properties, Net	455	'	989
Disposal Group, Including Discontinued Operation, Deferred Tax Assets	0	'	19
Disposal Group, Including Discontinued Operation, Other Noncurrent Assets	1	'	4
Assets of Disposal Group, Including Discontinued Operation, Noncurrent	456	'	1,012
Assets of Disposal Group, Including Discontinued Operation	571	'	1,459
Disposal Group, Including Discontinued Operation, Accounts Payable	5	'	38
Disposal Group, Including Discontinued Operation, Accrued Liabilities	132	'	324
Disposal Group, Including Discontinued Operations, Asset Retirement Obligation, Current	0	'	49
Disposal Group, Including Discontinued Operation, Other Current Liabilities	0	'	18
Liabilities of Disposal Group, Including Discontinued Operation, Current	137	'	429
Disposal Group, Including Discontinued Operations, Asset Retirement Obligations	2	'	86
Disposal Group, Including Discontinued Operation, Deferred Tax Liabilities	104	'	129
Disposal Group, Including Discontinued Operation, Other Noncurrent Liabilities	0	'	11
Liabilities of Disposal Group, Including Discontinued Operation, Noncurrent	106	'	226
Liabilities of Disposal Group, Including Discontinued Operation	243	'	655
Disposal Group, Including Discontinued Operations, Accumulated Depreciation, Depletion and Amortization, Property Plant and Equipment	115	'	1,121
Crude oil inventory in barrels	'	'	1,100
Energy Related Inventory, Petroleum	'	'	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)	9	13	'
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent	3	4	'
Disposal Group, Including Discontinued Operation, Operating Income (Loss)	9	13	'
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent	3	4	'
MALAYSIA	'	'	'
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]	'	'	'
Asset Retirement Obligation, Period Increase (Decrease)	133	'	'
Current [Member]	'	'	'
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]	'	'	'
Discontinued Operation, Tax Effect of Discontinued Operation	14	48	'
Deferred [Member]	'	'	'
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]	'	'	'
Discontinued Operation, Tax Effect of Discontinued Operation	$144	$3	'

Oil_and_Gas_Assets_Details

Oil and Gas Assets (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Oil and gas properties:	'	'	'
Subject to amortization	$13,930	'	$15,107
Capitalized Costs of Unproved Properties Excluded from Amortization, Cumulative	1,365	'	1,300
Gross oil and gas properties	15,295	'	16,407
Capitalized Costs, Accumulated Depreciation, Depletion, Amortization and Valuation Allowance for Relating to Oil and Gas Producing Activities	-7,483	'	-8,306
Net oil and gas properties	7,812	'	8,101
Accumulated depreciation and amortization	-73	'	-69
Net other property and equipment	176	'	174
Cost of oil and gas properties not subject to amortization	'	'	'
Acquisition costs	810	'	'
Exploration costs	285	'	'
Development costs	78	'	'
Fee mineral interests	24	'	'
Capitalized interest	168	'	'
Capitalized Costs of Unproved Properties Excluded from Amortization, Cumulative	1,365	'	1,300
Oil and Gas Assets (Textuals) [Abstract]	'	'	'
Percent of oil and gas properties not subject to amortization associated with unconventional resource plays	91.00%	'	'
Proceeds from Sale of Oil and Gas Property and Equipment	10	4	'
Furniture and Fixtures [Member]	'	'	'
Oil and gas properties:	'	'	'
Other property and equipment	141	'	139
Gas Gathering and Processing Equipment [Member]	'	'	'
Oil and gas properties:	'	'	'
Other property and equipment	108	'	104
Costs incurred in 2014 not subject to amortization [Member]	'	'	'
Oil and gas properties:	'	'	'
Capitalized Costs of Unproved Properties Excluded from Amortization, Cumulative	211	'	'
Cost of oil and gas properties not subject to amortization	'	'	'
Acquisition costs	28	'	'
Exploration costs	159	'	'
Development costs	11	'	'
Fee mineral interests	0	'	'
Capitalized interest	13	'	'
Capitalized Costs of Unproved Properties Excluded from Amortization, Cumulative	211	'	'
Costs incurred in 2013 not subject to amortization [Member]	'	'	'
Oil and gas properties:	'	'	'
Capitalized Costs of Unproved Properties Excluded from Amortization, Cumulative	379	'	'
Cost of oil and gas properties not subject to amortization	'	'	'
Acquisition costs	199	'	'
Exploration costs	114	'	'
Development costs	12	'	'
Fee mineral interests	1	'	'
Capitalized interest	53	'	'
Capitalized Costs of Unproved Properties Excluded from Amortization, Cumulative	379	'	'
Costs incurred in 2012 not subject to amortization [Member]	'	'	'
Oil and gas properties:	'	'	'
Capitalized Costs of Unproved Properties Excluded from Amortization, Cumulative	209	'	'
Cost of oil and gas properties not subject to amortization	'	'	'
Acquisition costs	109	'	'
Exploration costs	2	'	'
Development costs	31	'	'
Fee mineral interests	0	'	'
Capitalized interest	67	'	'
Capitalized Costs of Unproved Properties Excluded from Amortization, Cumulative	209	'	'
Costs incurred in 2011 and prior not subject to amortization [Member]	'	'	'
Oil and gas properties:	'	'	'
Capitalized Costs of Unproved Properties Excluded from Amortization, Cumulative	566	'	'
Cost of oil and gas properties not subject to amortization	'	'	'
Acquisition costs	474	'	'
Exploration costs	10	'	'
Development costs	24	'	'
Fee mineral interests	23	'	'
Capitalized interest	35	'	'
Capitalized Costs of Unproved Properties Excluded from Amortization, Cumulative	$566	'	'

Derivative_Financial_Instrumen2

Derivative Financial Instruments (Textuals) (Details) (USD $)	Mar. 31, 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%
Natural gas contracts [Member]	'
Derivative [Line Items]	'
Derivative Instruments Not Designated as Hedging Instruments, Liability, at Fair Value	28
Oil contracts [Member]	'
Derivative [Line Items]	'
Derivative Instruments Not Designated as Hedging Instruments, Liability, at Fair Value	65
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] | Swaption [Member]	'
Derivative [Line Items]	'
Volume in MBbls	1,548,000
Derivative, Swap Type, Average Fixed Price	90.29
Derivative Instruments Not Designated as Hedging Instruments, Liability, at Fair Value	4
Year2015 [Member] | Oil contracts [Member] | Swap [Member]	'
Derivative [Line Items]	'
Volume in MBbls	6,567,000
Derivative, Swap Type, Average Fixed Price	90.39

Outstanding_Natural_Gas_Contra

Outstanding Natural Gas Contracts That Are Not Designated for Hedge Accounting (Details) (Natural gas contracts [Member], USD $)	Mar. 31, 2014
In Millions, unless otherwise specified
Derivative [Line Items]	'
Derivative Liability, Fair Value, Total	($28)
Collars [Member] | Year 2014 [Member]	'
Derivative [Line Items]	'
Natural Gas Volumes	17,875,000
Derivative Liability, Fair Value, Total	-3
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	1
Fixed-price swaps | Year 2014 [Member]	'
Derivative [Line Items]	'
Natural Gas Volumes	64,625,000
Derivative, Swap Type, Average Fixed Price	3.98
Derivative Liability, Fair Value, Total	-30
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	$4

Outstanding_Oil_Contracts_That

Outstanding Oil Contracts That Are Not Designated For Hedge Accounting (Details) (Oil contracts [Member], USD $)	Mar. 31, 2014
In Millions, unless otherwise specified
Derivative [Line Items]	'
Derivative Liability, Fair Value, Total	($65)
Fixed Price Swaps With Sold Puts [Member] | Year 2014 [Member]	'
Derivative [Line Items]	'
Volume in MBbls	4,400,000
Derivative, Swap Type, Average Fixed Price	95.16
Derivative Weighted Average Additional Put Price	75
Derivative Liability, Fair Value, Total	-13
Fixed Price Swaps With Sold Puts [Member] | Year2015 [Member]	'
Derivative [Line Items]	'
Volume in MBbls	6,621,000
Derivative, Swap Type, Average Fixed Price	90.13
Derivative Weighted Average Additional Put Price	69.17
Derivative Liability, Fair Value, Total	-6
Fixed Price Swaps With Sold Puts [Member] | Year 2016 [Member]	'
Derivative [Line Items]	'
Volume in MBbls	637,000
Derivative, Swap Type, Average Fixed Price	90.02
Derivative Weighted Average Additional Put Price	70
Derivative Asset, Fair Value, Total	1
Collars With Sold Puts [Member] | Year 2014 [Member]	'
Derivative [Line Items]	'
Volume in MBbls	1,650,000
Derivative Weighted Average Additional Put Price	75.83
Derivative, Weighted Average Floor Price	90.83
Derivative, Weighted Average Ceiling Price	103
Derivative Liability, Fair Value, Total	-1
Fixed-price swaps | Year 2014 [Member]	'
Derivative [Line Items]	'
Volume in MBbls	5,777,000
Derivative, Swap Type, Average Fixed Price	89.96
Derivative Liability, Fair Value, Total	-44
Fixed-price swaps | Year2015 [Member]	'
Derivative [Line Items]	'
Volume in MBbls	6,567,000
Derivative, Swap Type, Average Fixed Price	90.39
Derivative Asset, Fair Value, Total	2
Swaption [Member] | Year2015 [Member]	'
Derivative [Line Items]	'
Volume in MBbls	1,548,000
Derivative, Swap Type, Average Fixed Price	90.29
Derivative Liability, Fair Value, Total	($4)

Derivative_Financial_Instrumen3

Derivative Financial Instruments Recorded in Balance Sheet (Details) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Derivative, Fair Value, Net [Abstract]	'	'
Derivative Asset Not Designated As Hedging Instrument, Fair Value	$27	$37
Derivative Liability Not Designated as Hedging Instrument Fair Value	-120	-73
Derivative Asset, Current	0	0
Derivative Asset, Noncurrent	17	26
Derivative Liability, Current	108	62
Derivative Liability, Noncurrent	2	0
Derivative Assets Offset Against Derivative Liabilities	10	11
Natural gas contracts [Member]	'	'
Derivative, Fair Value, Net [Abstract]	'	'
Derivative Asset Not Designated As Hedging Instrument, Fair Value	12	11
Derivative Liability Not Designated as Hedging Instrument Fair Value	-40	-22
Derivative Asset, Current	0	0
Derivative Asset, Noncurrent	12	9
Derivative Liability, Current	40	20
Derivative Liability, Noncurrent	0	0
Derivative Assets Offset Against Derivative Liabilities	0	2
Oil contracts [Member]	'	'
Derivative, Fair Value, Net [Abstract]	'	'
Derivative Asset Not Designated As Hedging Instrument, Fair Value	15	26
Derivative Liability Not Designated as Hedging Instrument Fair Value	-80	-51
Derivative Asset, Current	0	0
Derivative Asset, Noncurrent	5	17
Derivative Liability, Current	68	42
Derivative Liability, Noncurrent	2	0
Derivative Assets Offset Against Derivative Liabilities	$10	$9

Amount_of_Gain_Loss_Recognized

Amount of Gain Loss Recognized in Income Related to Derivative Financial Instruments (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net [Abstract]	'	'
Realized Gain (Loss) on Derivatives	($39)	$27
Unrealized Gain (Loss) on Derivatives	-57	-111
Derivative, Gain (Loss) on Derivative, Net	-96	-84
Natural gas contracts [Member]	'	'
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net [Abstract]	'	'
Realized Gain (Loss) on Derivatives	-22	27
Unrealized Gain (Loss) on Derivatives	-17	-88
Oil contracts [Member]	'	'
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net [Abstract]	'	'
Realized Gain (Loss) on Derivatives	-17	0
Unrealized Gain (Loss) on Derivatives	($40)	($23)

Accounts_Receivable_Details

Accounts Receivable (Details) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Accounts Receivable	'	'
Accounts receivable	$384	$474
Revenue [Member]	'	'
Accounts Receivable	'	'
Accounts receivable	222	294
Other accounts receivable [Member]	'	'
Accounts Receivable	'	'
Accounts receivable	37	25
Allowance For Doubtful Accounts [Member]	'	'
Accounts Receivable	'	'
Accounts receivable	-1	-1
Oil and Gas Joint Interest Billing [Member]	'	'
Accounts Receivable	'	'
Accounts receivable	$126	$156

Accrued_Liabilities_Details

Accrued Liabilities (Details) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Accrued Liabilities	'	'
Accrued liabilities	$728	$978
Revenue payable [Member]	'	'
Accrued Liabilities	'	'
Accrued liabilities	187	175
Accrued capital costs [Member]	'	'
Accrued Liabilities	'	'
Accrued liabilities	365	458
Accrued lease operating expenses [Member]	'	'
Accrued Liabilities	'	'
Accrued liabilities	27	71
Employee incentive expense [Member]	'	'
Accrued Liabilities	'	'
Accrued liabilities	35	64
Accrued interest on debt [Member]	'	'
Accrued Liabilities	'	'
Accrued liabilities	46	72
Taxes payable [Member]	'	'
Accrued Liabilities	'	'
Accrued liabilities	29	93
Other accrued liabilities [Member]	'	'
Accrued Liabilities	'	'
Accrued liabilities	$39	$45

Fair_Value_Measurements_Textua

Fair Value Measurements (Textuals) (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013	Dec. 31, 2012
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	'	$109	$26	$151
Liability Value	-38	'	'	'
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss) Included in Investment Income	'	-5	'	'
Fair Value, Liabilities Measured on Recurring Basis, Change in Unrealized Gain (Loss)	-25	'	'	'
Money Market Funds, at Carrying Value	74	'	2	'
Deferred Compensation Plan Assets	9	'	8	'
Assets, Fair Value Disclosure	'	'	5	'
Financial and Nonfinancial Liabilities, Fair Value Disclosure	-31	'	'	'
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings	-27	-27	'	'
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)	'	3	'	'
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements	-37	-18	'	'
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net	0	0	'	'
Obligations, Fair Value Disclosure	-29	'	-16	'
Oil contracts [Member]	'	'	'	'
Derivative Instruments Not Designated as Hedging Instruments, Asset, at Fair Value	-65	'	'	'
Oil contracts [Member] | Options Held [Member]	'	'	'	'
Derivative Instruments Not Designated as Hedging Instruments, Asset, at Fair Value	-17	'	'	'
Oil contracts [Member] | Maximum [Member] | Options Held [Member]	'	'	'	'
Fair Value Assumptions Expected Volatility Curves	53.09%	'	'	'
Fair Value Inputs, Entity Credit Risk	1.33%	'	'	'
Oil contracts [Member] | Minimum [Member] | Options Held [Member]	'	'	'	'
Fair Value Assumptions Expected Volatility Curves	14.42%	'	'	'
Fair Value Inputs, Entity Credit Risk	0.01%	'	'	'
Natural gas contracts [Member]	'	'	'	'
Derivative Instruments Not Designated as Hedging Instruments, Asset, at Fair Value	-28	'	'	'
Natural gas contracts [Member] | Options Held [Member]	'	'	'	'
Derivative Instruments Not Designated as Hedging Instruments, Asset, at Fair Value	-2	'	'	'
Natural gas contracts [Member] | Maximum [Member] | Options Held [Member]	'	'	'	'
Fair Value Assumptions Expected Volatility Curves	49.56%	'	'	'
Fair Value Inputs, Entity Credit Risk	1.15%	'	'	'
Natural gas contracts [Member] | Minimum [Member] | Options Held [Member]	'	'	'	'
Fair Value Assumptions Expected Volatility Curves	19.33%	'	'	'
Fair Value Inputs, Entity Credit Risk	0.01%	'	'	'
Equity Securities [Member]	'	'	'	'
Available-for-sale Securities, Fair Value Disclosure	8	'	8	'
Commodity Option [Member]	'	'	'	'
Derivative Liability	-19	'	-8	'
Auction Rate Securities [Member]	'	'	'	'
Available-for-sale Securities, Fair Value Disclosure	'	'	39	'
Proceeds from Sale of Available-for-sale Securities	39	'	'	'
Swap [Member]	'	'	'	'
Derivative Liability	-74	'	-28	'
Quoted Prices In Active Markets for Identical Assets or Liabilities, Fair Value Inputs (Level 1) [Member]	'	'	'	'
Money Market Funds, at Carrying Value	74	'	2	'
Deferred Compensation Plan Assets	9	'	8	'
Assets, Fair Value Disclosure	81	'	7	'
Obligations, Fair Value Disclosure	-10	'	-11	'
Quoted Prices In Active Markets for Identical Assets or Liabilities, Fair Value Inputs (Level 1) [Member] | Equity Securities [Member]	'	'	'	'
Available-for-sale Securities, Fair Value Disclosure	8	'	8	'
Quoted Prices In Active Markets for Identical Assets or Liabilities, Fair Value Inputs (Level 1) [Member] | Commodity Option [Member]	'	'	'	'
Derivative Assets	0	'	0	'
Quoted Prices In Active Markets for Identical Assets or Liabilities, Fair Value Inputs (Level 1) [Member] | Auction Rate Securities [Member]	'	'	'	'
Available-for-sale Securities, Fair Value Disclosure	'	'	0	'
Quoted Prices In Active Markets for Identical Assets or Liabilities, Fair Value Inputs (Level 1) [Member] | Swap [Member]	'	'	'	'
Derivative Assets	'	'	0	'
Derivative Liability	0	'	'	'
Significant Other Observable Fair Value Inputs (Level 2) [Member]	'	'	'	'
Money Market Funds, at Carrying Value	0	'	0	'
Deferred Compensation Plan Assets	0	'	0	'
Financial and Nonfinancial Liabilities, Fair Value Disclosure	-74	'	-28	'
Obligations, Fair Value Disclosure	0	'	0	'
Significant Other Observable Fair Value Inputs (Level 2) [Member] | Equity Securities [Member]	'	'	'	'
Available-for-sale Securities, Fair Value Disclosure	0	'	0	'
Significant Other Observable Fair Value Inputs (Level 2) [Member] | Commodity Option [Member]	'	'	'	'
Derivative Assets	0	'	0	'
Significant Other Observable Fair Value Inputs (Level 2) [Member] | Auction Rate Securities [Member]	'	'	'	'
Available-for-sale Securities, Fair Value Disclosure	'	'	0	'
Significant Other Observable Fair Value Inputs (Level 2) [Member] | Swap [Member]	'	'	'	'
Derivative Liability	-74	'	-28	'
Fair Value, Inputs, Level 3 [Member]	'	'	'	'
Money Market Funds, at Carrying Value	0	'	0	'
Deferred Compensation Plan Assets	0	'	0	'
Assets, Fair Value Disclosure	'	'	26	'
Financial and Nonfinancial Liabilities, Fair Value Disclosure	-38	'	'	'
Obligations, Fair Value Disclosure	-19	'	-5	'
Fair Value, Inputs, Level 3 [Member] | Equity Securities [Member]	'	'	'	'
Available-for-sale Securities, Fair Value Disclosure	0	'	0	'
Fair Value, Inputs, Level 3 [Member] | Commodity Option [Member]	'	'	'	'
Derivative Liability	-19	'	-8	'
Fair Value, Inputs, Level 3 [Member] | Auction Rate Securities [Member]	'	'	'	'
Available-for-sale Securities, Fair Value Disclosure	'	'	39	'
Fair Value, Inputs, Level 3 [Member] | Swap [Member]	'	'	'	'
Derivative Assets	'	'	0	'
Derivative Liability	0	'	'	'
Derivative Financial Instruments, Assets [Member]	'	'	'	'
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	'	70	'	115
Liability Value	-19	'	-8	'
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss) Included in Investment Income	'	-5	'	'
Fair Value, Liabilities Measured on Recurring Basis, Change in Unrealized Gain (Loss)	-11	'	'	'
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings	'	-27	'	'
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings	-13	'	'	'
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)	'	0	'	'
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements	'	-18	'	'
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Settlements	2	'	'	'
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net	0	0	'	'
Investments [Member]	'	'	'	'
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	0	39	39	36
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss) Included in Investment Income	0	0	'	'
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings	0	0	'	'
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)	'	3	'	'
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements	-39	0	'	'
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net	0	0	'	'
7.125% Senior Subordinated Notes due 2018 [Member]	'	'	'	'
Debt Instrument, Fair Value Disclosure	618	'	624	'
6.875% Senior Subordinated Notes due 2020 [Member]	'	'	'	'
Debt Instrument, Fair Value Disclosure	742	'	755	'
5.625% Senior Notes Due 2024 [Member]	'	'	'	'
Debt Instrument, Fair Value Disclosure	1,065	'	1,025	'
5.75 %Senior Notes Due 2022 [Member]	'	'	'	'
Debt Instrument, Fair Value Disclosure	804	'	767	'
Stock Compensation Plan [Member]	'	'	'	'
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	'	0	'	'
Liability Value	-19	'	-5	0
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss) Included in Investment Income	'	0	'	'
Fair Value, Liabilities Measured on Recurring Basis, Change in Unrealized Gain (Loss)	-14	'	'	'
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings	'	0	'	'
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings	-14	'	'	'
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)	'	0	'	'
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements	0	0	'	'
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net	$0	$0	'	'

Valuation_of_Investments_and_F

Valuation of Investments and Financial Instrument Assets Liabilities By Pricing Levels (Details) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Money market fund investments	$74	$2
Deferred Compensation Plan Assets	9	8
Total	'	5
Equity Securities [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Available-for-sale Securities	8	8
Auction Rate Securities [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Available-for-sale Securities	'	39
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	74	2
Deferred Compensation Plan Assets	9	8
Total	81	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	8	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
Significant Other Observable Fair Value Inputs (Level 2) [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Money market fund investments	0	0
Deferred Compensation Plan Assets	0	0
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] | 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

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 $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'	'
Beginning Balance	$26	$151
Included in earnings	-27	-27
Included in other comprehensive income (loss)	'	3
Settlements	-37	-18
Transfers in and out of Level 3	0	0
Ending Balance	'	109
Change in unrealized gains (losses) relating to investments and derivatives still held	'	-5
Derivatives [Member]	'	'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'	'
Beginning Balance	'	115
Included in earnings	'	-27
Included in other comprehensive income (loss)	'	0
Settlements	'	-18
Transfers in and out of Level 3	0	0
Ending Balance	'	70
Change in unrealized gains (losses) relating to investments and derivatives still held	'	-5
Investments [Member]	'	'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'	'
Beginning Balance	39	36
Included in earnings	0	0
Included in other comprehensive income (loss)	'	3
Settlements	-39	0
Transfers in and out of Level 3	0	0
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 $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2014
Fair Value, Option, Quantitative Disclosures [Line Items]	'
Liability Value	($38)
Stockholder Value Appreciation Program [Member]	'
Fair Value, Option, Quantitative Disclosures [Line Items]	'
Liability Value	-19
SBC Expected Volatility Rate, Maximum	38.00%
Natural gas contracts [Member]	'
Fair Value, Option, Quantitative Disclosures [Line Items]	'
Derivative Liability, Fair Value, Total	-28
Oil contracts [Member]	'
Fair Value, Option, Quantitative Disclosures [Line Items]	'
Derivative Liability, Fair Value, Total	-65
Options Held [Member] | Natural gas contracts [Member]	'
Fair Value, Option, Quantitative Disclosures [Line Items]	'
Derivative Liability, Fair Value, Total	-2
Options Held [Member] | Natural gas contracts [Member] | Maximum [Member]	'
Fair Value, Option, Quantitative Disclosures [Line Items]	'
Credit Risk	1.15%
Fair Value Assumptions Expected Volatility Curves	49.56%
Options Held [Member] | Natural gas contracts [Member] | Minimum [Member]	'
Fair Value, Option, Quantitative Disclosures [Line Items]	'
Credit Risk	0.01%
Fair Value Assumptions Expected Volatility Curves	19.33%
Options Held [Member] | Oil contracts [Member]	'
Fair Value, Option, Quantitative Disclosures [Line Items]	'
Derivative Liability, Fair Value, Total	($17)
Options Held [Member] | Oil contracts [Member] | Maximum [Member]	'
Fair Value, Option, Quantitative Disclosures [Line Items]	'
Credit Risk	1.33%
Fair Value Assumptions Expected Volatility Curves	53.09%
Options Held [Member] | Oil contracts [Member] | Minimum [Member]	'
Fair Value, Option, Quantitative Disclosures [Line Items]	'
Credit Risk	0.01%
Fair Value Assumptions Expected Volatility Curves	14.42%

Estimated_Fair_Value_of_Notes_

Estimated Fair Value of Notes Based on Quoted Market Prices (Details) (USD $)	Mar. 31, 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	$804	$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	1,065	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	618	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	$742	$755

Debt_Details

Debt (Details) (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Debt Instrument [Line Items]	'	'	'
Line of Credit Facility, Amount Outstanding	$0	'	$649,000,000
Long-term debt	3,046,000,000	'	3,694,000,000
Debt (Textuals)	'	'	'
Line of Credit Facility, Maximum Borrowing Capacity	1,400,000,000	'	'
Largest individual loan commitment by any lender of total commitments	14.00%	'	'
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%	'	'
Commitment fees incurred	1,000,000	1,000,000	'
Ratio of Indebtedness to Net Capital 1	0.6	'	'
Ratio of total debt to earnings before gain or loss on disposition of assets, interest expense, income taxes and noncash items	3	'	'
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%	'	'
Line of Credit Facility, Current Borrowing Capacity	195,000,000	'	'
Discount On Notes [Member]	'	'	'
Debt Instrument [Line Items]	'	'	'
Long-term debt	-4,000,000	'	-5,000,000
6.875% Senior Subordinated Notes due 2020 [Member]	'	'	'
Debt Instrument [Line Items]	'	'	'
Long-term debt	700,000,000	'	700,000,000
Debt Instrument, Interest Rate, Stated Percentage	6.88%	'	6.88%
7.125% Senior Subordinated Notes due 2018 [Member]	'	'	'
Debt Instrument [Line Items]	'	'	'
Long-term debt	600,000,000	'	600,000,000
Debt Instrument, Interest Rate, Stated Percentage	7.13%	'	7.13%
Total senior unsecured debt	'	'	'
Debt Instrument [Line Items]	'	'	'
Long-term debt	1,750,000,000	'	2,399,000,000
5.625% Senior Notes Due 2024 [Member]	'	'	'
Debt Instrument [Line Items]	'	'	'
Long-term debt	1,000,000,000	'	1,000,000,000
Debt Instrument, Interest Rate, Stated Percentage	5.63%	'	5.63%
5.75 %Senior Notes Due 2022 [Member]	'	'	'
Debt Instrument [Line Items]	'	'	'
Long-term debt	750,000,000	'	750,000,000
Debt Instrument, Interest Rate, Stated Percentage	5.75%	'	5.75%
Money market lines of credit [Member]	'	'	'
Debt Instrument [Line Items]	'	'	'
Line of Credit Facility, Amount Outstanding	0	'	64,000,000
Revolving Credit Facility Libor Based Loans [Member]	'	'	'
Debt Instrument [Line Items]	'	'	'
Line of Credit Facility, Amount Outstanding	$0	'	$585,000,000

Income_Taxes_Details

Income Taxes (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Deferred tax liability:	'	'	'
Less net current deferred tax liability	$20	'	$22
Income tax reconciliation to US federal statutory rate	'	'	'
Amount computed using the statutory rate	14	-14	'
Increase (decrease) in taxes resulting from:	'	'	'
State and local income taxes, net of federal effect	3	-2	'
Total income tax provision (benefit)	$17	($16)	'
Income Taxes (Textuals) [Abstract]	'	'	'
Federal statutory tax rate	35.00%	'	'
Effective Income Tax Rate Reconciliation, Percent	42.40%	38.50%	'

StockBased_Compensation_Detail

Stock-Based Compensation (Details) (USD $)	3 Months Ended
In Millions, except Share data, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Total stock-based compensation expense	$31	$12	'
Capitalized in oil and gas properties	-14	-3	'
Allocated Share-based Compensation Expense, Net of Amount Capitalized in Oil and Gas Properties	17	9	'
Number of restricted stock shares vested	142,000	'	'
Number of restricted stock shares outstanding	3,925,000	'	3,705,000
Nonvested Awards, Total Compensation Cost Not yet Recognized	115	'	'
Liability Value	38	'	'
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	$31.36	'	'
Equity [Member]	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Total stock-based compensation expense	11	12	'
Liability [Member]	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Total stock-based compensation expense	20	0	'
Cash-Settled Restricted Stock Units [Member]	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Vesting Period	'3 years 0 months 0 days	'	'
Number of restricted stock shares vested	283,000	38,000	'
Number of restricted stock shares outstanding	1,000,000	'	'
Fair value of units vested during the period	7	1	'
Nonvested Awards, Total Compensation Cost Not yet Recognized	18	'	'
Stockholder Value Appreciation Program [Member]	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Employee Service Shared-based Compensation, Nonvested Awards, Compensation Cost Not yet Paid	34	'	'
Nonvested Awards, Total Compensation Cost Not yet Recognized	15	'	'
Weighted Average Volatility Rate	37.00%	'	'
Liability Value	$19	'	'
SVAP Expected Term	'1 year 9 months	'	'
Fair Value Assumptions, Risk Free Interest Rate	0.32%	'	'

StockBased_Compensation_Stock_

Stock-Based Compensation- Stock Option Activity (Details) (USD $)	3 Months Ended	12 Months Ended
In Millions, except Share data in Thousands, unless otherwise specified	Mar. 31, 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	-10	'
Forfeited, Number of Shares Underlying Options	-102	'
Outstanding, Ending Balance, Number of Shares Underlying Options	575	687
Exercisable, Number of Shares Underlying Options	575	'
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	$24.07	'
Forfeited, Weighted Average Exercise Price per Share	$29.98	'
Outstanding, Ending Balance, Weighted Average Exercise Price per Share	$41.67	$39.68
Exercisable, Weighted Average Exercise Price per Share	$41.67	'
Weighted average fair value of each option	$0	'
Outstanding, Beginning Balance, Weighted Average Remaining Contractual Life (In years)	'1 year 10 months	'1 year 11 months
Outstanding, Ending Balance, Weighted Average Remaining Contractual Life (In years)	'1 year 10 months	'1 year 11 months
Exercisable, Weighted Average Remaining Contractual Life (In years)	'1 year 10 months	'
Outstanding, Beginning Balance, Aggregate Intrinsic Value	$0	'
Exercised, Aggregate Intrinsic Value	0	'
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 $)	3 Months Ended	12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Mar. 31, 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	575	687
Options Outstanding, Weighted Average Remaining Contractual Life (In years)	'1 year 10 months	'1 year 11 months
Options Exercisable, Number of Shares Underlying Options	575	'
Options Exercisable, Weighted Average Exercise Price per Share	$41.67	'

StockBased_Compensation_Restri

Stock-Based Compensation- Restricted Stock and Restricted Stock Units Activity (Details) (USD $)	3 Months Ended
	Mar. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Non-vested shares outstanding, Beginning balance	3,705,000
Granted	516,000
Forfeited	-154,000
Vested	-142,000
Non-vested shares outstanding, Ending balance	3,925,000
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	$20.57
Forfeited, Weighted Average Grant Date Fair Value per Share	$32.85
Vested, Weighted Average Grant Date Fair Value per Share	$61.24
Non-vested shares outstanding, Weighted Average Grant Date Fair Value per Share, Ending balance	$30.72
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	177,000
Forfeited	-132,000
Vested	-142,000
Non-vested shares outstanding, Ending balance	2,902,000
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	-22,000
Vested	0
Non-vested shares outstanding, Ending balance	1,023,000

StockBased_Compensation_Employ

Stock-Based Compensation- Employee Stock Purchase Plan (Details) (USD $)	3 Months Ended
	Mar. 31, 2014
Employee Stock Purchase Plan ESPP Disclosures [Line Items]	'
Options To Purchase Common Stock Shares	0
Weighted average fair value of each option	$0
Employee Stock Purchase Plan [Member]	'
Employee Stock Purchase Plan ESPP Disclosures [Line Items]	'
Options To Purchase Common Stock Shares	90,000
Weighted average fair value of each option	$5.96
Expected volatility	34.00%
Risk-free weighted average interest rate	0.09%
Vesting Period	'0 years 6 months 0 days

Supplemental_Cash_Flows_Inform2

Supplemental Cash Flows Information (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Supplemental Cash Flow Information [Abstract]	'	'
Increase (Decrease) in Other Receivables	$0	$15
IncreaseDecreaseInOtherReceivablesOnSaleOfBusiness	-15	0
Non Cash Items Excluded From Statement of Cash Flows [Abstract]	'	'
(Increase) decrease in accrued capital expenditures	90	-8
Increase in asset retirement costs	13	-4
Increase (Decrease) in Other Deposits	($90)	$0

Related_Party_Transaction_Deta

Related Party Transaction (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Mar. 31, 2014
Related Party Transaction [Line Items]	'	'
Ownership interest percentage in Bohai Bay Unit	'	12.00%
Payments for Repurchase of Preferred Stock and Preference Stock	$20	'