Hess (HES) 10-Q 10 Nov 14 2014 Q3 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	9 Months Ended
	Sep. 30, 2014
Document And Entity Information [Abstract]	'
Document Type	'10-Q
Amendment Flag	'false
Document Period End Date	30-Sep-14
Document Fiscal Year Focus	'2014
Document Fiscal Period Focus	'Q3
Trading Symbol	'HES
Entity Registrant Name	'HESS CORP
Entity Central Index Key	'0000004447
Current Fiscal Year End Date	'--12-31
Entity Filer Category	'Large Accelerated Filer
Entity Common Stock, Shares Outstanding	298,968,566

Consolidated_Balance_Sheet

Consolidated Balance Sheet (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
CURRENT ASSETS	'	'
Cash and cash equivalents	$4,120	$1,814
Accounts receivable	'	'
Trade	2,674	3,093
Other	385	432
Inventories	817	954
Other current assets	869	2,306
Total current assets	8,865	8,599
INVESTMENTS IN AFFILIATES	145	687
PROPERTY, PLANT AND EQUIPMENT	'	'
Total — at cost	46,142	45,950
Less: Reserves for depreciation, depletion, amortization and lease impairment	18,475	17,179
Property, plant and equipment — net	27,667	28,771
GOODWILL	1,858	1,869
DEFERRED INCOME TAXES	1,940	2,319
OTHER ASSETS	500	509
TOTAL ASSETS	40,975	42,754
CURRENT LIABILITIES	'	'
Accounts payable	1,712	2,109
Accrued liabilities	2,954	3,551
Taxes payable	282	520
Short-term debt and current maturities of long-term debt	67	378
Total current liabilities	5,015	6,558
LONG-TERM DEBT	5,929	5,420
DEFERRED INCOME TAXES	2,316	2,292
ASSET RETIREMENT OBLIGATIONS	2,313	2,249
OTHER LIABILITIES AND DEFERRED CREDITS	1,037	1,451
Total liabilities	16,610	17,970
Hess Corporation stockholders’ equity	'	'
Common stock, par value $1.00 Authorized - 600,000,000 shares Issued - 298,968,566 shares at September 30, 2014; 325,314,177 shares at December 31, 2013	299	325
Capital in excess of par value	3,417	3,498
Retained earnings	21,020	21,235
Accumulated other comprehensive income (loss)	-487	-338
Total Hess Corporation stockholders' equity	24,249	24,720
Noncontrolling interests	116	64
Total equity	24,365	24,784
TOTAL LIABILITIES AND EQUITY	$40,975	$42,754

Consolidated_Balance_Sheet_Par

Consolidated Balance Sheet (Parenthetical) (USD $)	Sep. 30, 2014	Dec. 31, 2013
Statement Of Financial Position [Abstract]	'	'
Common stock, par value	$1	$1
Common stock, shares authorized	600,000,000	600,000,000
Common stock, shares issued	298,968,566	325,314,177

Statement_of_Consolidated_Inco

Statement of Consolidated Income (USD $)	3 Months Ended		9 Months Ended
In Millions, except Per Share data, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
REVENUES AND NON-OPERATING INCOME	'	'	'	'
Sales and other operating revenues	$2,745	$2,720	$8,363	$9,257
Gains (losses) on asset sales	31	-5	820	1,794
Other, net	26	-1	-89	-56
Total revenues and non-operating income	2,802	2,714	9,094	10,995
COSTS AND EXPENSES	'	'	'	'
Cost of products sold (excluding items shown separately below)	447	375	1,284	1,392
Operating costs and expenses	487	475	1,475	1,570
Production and severance taxes	69	84	209	311
Marketing expenses	34	27	99	87
Exploration expenses, including dry holes and lease impairment	90	154	669	573
General and administrative expenses	139	152	424	469
Interest expense	75	86	241	309
Depreciation, depletion and amortization	837	681	2,349	1,974
Total costs and expenses	2,178	2,034	6,750	6,685
INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	624	680	2,344	4,310
Provision for income taxes	237	324	575	1,192
INCOME FROM CONTINUING OPERATIONS	387	356	1,769	3,118
INCOME FROM DISCONTINUED OPERATIONS,NET OF INCOME TAXES	643	62	612	189
NET INCOME	1,030	418	2,381	3,307
Less: Net income (loss) attributable to noncontrolling interests	22	-2	56	180
NET INCOME ATTRIBUTABLE TO HESS CORPORATION	$1,008	$420	$2,325	$3,127
NET INCOME ATTRIBUTABLE TO HESS CORPORATION PER SHARE	'	'	'	'
Continuing operations	$1.21	$1.06	$5.55	$8.66
Discontinued operations	$2.14	$0.18	$1.99	$0.56
NET INCOME PER SHARE	$3.35	$1.24	$7.54	$9.22
DILUTED:	'	'	'	'
Continuing operations	$1.20	$1.05	$5.48	$8.56
Discontinued operations	$2.11	$0.18	$1.96	$0.55
NET INCOME PER SHARE	$3.31	$1.23	$7.44	$9.11
WEIGHTED AVERAGE NUMBER OF COMMON SHARES OUTSTANDING (DILUTED)	305	343.3	312.7	343.3
COMMON STOCK DIVIDENDS PER SHARE	$0.25	$0.25	$0.75	$0.45

Statement_of_Consolidated_Comp

Statement of Consolidated Comprehensive Income (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Statement Of Income And Comprehensive Income [Abstract]	'	'	'	'
NET INCOME	$1,030	$418	$2,381	$3,307
Derivatives designated as cash flow hedges	'	'	'	'
Effect of hedge (gains) losses reclassified to income	-8	-5	-18	-46
Income taxes on effect of hedge (gains) losses reclassified to income	3	2	7	17
Net effect of hedge (gains) losses reclassified to income	-5	-3	-11	-29
Change in fair value of cash flow hedges	90	-96	64	69
Income taxes on change in fair value of cash flow hedges	-34	37	-24	-26
Net change in fair value of cash flow hedges	56	-59	40	43
Change in derivatives designated as cash flow hedges, after taxes	51	-62	29	14
Pension and other postretirement plans	'	'	'	'
(Increase) reduction in unrecognized actuarial losses	'	'	-4	245
Income taxes on actuarial changes in plan liabilities	'	'	2	-89
(Increase) reduction in unrecognized actuarial losses, net	'	'	-2	156
Amortization of net actuarial losses	19	12	42	46
Income taxes on amortization of net actuarial losses	-7	-5	-15	-17
Net effect of amortization of net actuarial losses	12	7	27	29
Change in pension and other postretirement plans, after taxes	12	7	25	185
Foreign currency translation adjustment	'	'	'	'
Foreign currency translation adjustment	-166	27	-203	-266
Reclassified to Gains (losses) on asset sales	'	'	'	119
Change in foreign currency translation adjustment	-166	27	-203	-147
TOTAL OTHER COMPREHENSIVE INCOME (LOSS)	-103	-28	-149	52
COMPREHENSIVE INCOME	927	390	2,232	3,359
Less: Comprehensive income (loss) attributable to noncontrolling interests	22	-2	56	186
COMPREHENSIVE INCOME ATTRIBUTABLE TO HESS CORPORATION	$905	$392	$2,176	$3,173

Statement_of_Consolidated_Cash

Statement of Consolidated Cash Flows (USD $)	9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013
CASH FLOWS FROM OPERATING ACTIVITIES	'	'
NET INCOME	$2,381	$3,307
Adjustments to reconcile net income to net cash provided by operating activities	'	'
Depreciation, depletion and amortization	2,349	1,974
Exploratory dry hole costs	297	87
Exploration lease impairment	183	167
(Gains) losses on asset sales	-820	-1,794
Loss from equity affiliates	84	'
Stock compensation expense	65	52
Provision for deferred income taxes	233	392
Income from discontinued operations	-612	-189
Changes in operating assets and liabilities	-721	-966
Cash provided by (used in) operating activities — continuing operations	3,439	3,030
Cash provided by (used in) operating activities — discontinued operations	-32	290
Net cash provided by (used in) operating activities	3,407	3,320
CASH FLOWS FROM INVESTING ACTIVITIES	'	'
Capital expenditures	-3,710	-4,389
Proceeds from asset sales	2,978	3,802
Other, net	-137	-165
Cash provided by (used in) investing activities — continuing operations	-869	-752
Cash provided by (used in) investing activities — discontinued operations	2,408	-60
Net cash provided by (used in) investing activities	1,539	-812
CASH FLOWS FROM FINANCING ACTIVITIES	'	'
Net borrowings (repayments) of debt with maturities of 90 days or less	'	-1,313
Debt with maturities of greater than 90 days	'	'
Borrowings	598	535
Repayments	-553	-1,290
Common stock acquired and retired	-2,638	-500
Cash dividends paid	-232	-154
Employee stock options exercised, including income tax benefits	191	84
Noncontrolling interests, net	-4	-189
Cash provided by (used in) financing activities — continuing operations	-2,638	-2,827
Cash provided by (used in) financing activities — discontinued operations	-2	-2
Net cash provided by (used in) financing activities	-2,640	-2,829
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	2,306	-321
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR	1,814	642
CASH AND CASH EQUIVALENTS AT END OF PERIOD	$4,120	$321

Statement_of_Consolidated_Equi

Statement of Consolidated Equity (USD $)	Total	Common Stock [Member]	Capital in Excess of Par [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Total Hess Stockholders' Equity [Member]	Noncontrolling Interests [Member]
In Millions
Beginning balance at Dec. 31, 2012	$21,203	$342	$3,524	$17,717	($493)	$21,090	$113
NET INCOME	3,307	'	'	3,127	'	3,127	180
Other comprehensive income (loss)	52	'	'	'	46	46	6
Comprehensive income (loss)	3,359	'	'	'	'	3,173	186
Activity related to restricted common stock awards, net	39	1	38	'	'	39	'
Employee stock options, including income tax benefits	95	2	93	'	'	95	'
Performance share units	12	'	12	'	'	12	'
Cash dividends declared	-154	'	'	-154	'	-154	'
Common stock acquired and retired	-500	-7	-68	-425	'	-500	'
Noncontrolling interests, net	-212	'	'	14	'	14	-226
Ending balance at Sep. 30, 2013	23,842	338	3,599	20,279	-447	23,769	73
Beginning balance at Dec. 31, 2013	24,784	325	3,498	21,235	-338	24,720	64
NET INCOME	2,381	'	'	2,325	'	2,325	56
Other comprehensive income (loss)	-149	'	'	'	-149	-149	'
Comprehensive income (loss)	2,232	'	'	'	'	2,176	56
Activity related to restricted common stock awards, net	47	1	46	'	'	47	'
Employee stock options, including income tax benefits	193	3	190	'	'	193	'
Performance share units	14	'	14	'	'	14	'
Cash dividends declared	-232	'	'	-232	'	-232	'
Common stock acquired and retired	-2,669	-30	-331	-2,308	'	-2,669	'
Noncontrolling interests, net	-4	'	'	'	'	'	-4
Ending balance at Sep. 30, 2014	$24,365	$299	$3,417	$21,020	($487)	$24,249	$116

Basis_of_Presentation

Basis of Presentation	9 Months Ended
	Sep. 30, 2014
Accounting Policies [Abstract]	'
Basis of Presentation	'
	1. Basis of Presentation
	The financial statements included in this report reflect all normal and recurring adjustments which, in the opinion of management, are necessary for a fair presentation of Hess Corporation’s (the Corporation or Hess) consolidated financial position at September 30, 2014 and December 31, 2013, and the consolidated results of operations and cash flows for the three and nine month periods ended September 30, 2014 and 2013. The unaudited results of operations for the interim periods reported are not necessarily indicative of results to be expected for the full year.
	In the first quarter of 2013, the Corporation announced several initiatives to continue its transformation into a focused pure play Exploration and Production (E&P) company. The transformation plan included fully exiting the Corporation’s Marketing and Refining (M&R) businesses, the sale of mature E&P assets and monetizing Bakken midstream assets in 2015. The M&R businesses to be divested included retail, energy marketing, terminal, energy trading and refining operations, as well as the Corporation’s interests in two power plant joint ventures. In February 2013, the Corporation permanently ceased its refining operations at the Port Reading facility, completing its exit from all refining operations. In the fourth quarter of 2013, the Corporation completed the sale of its energy marketing and terminal businesses and in the third quarter of 2014, the Corporation completed the sale of its retail business. The Corporation’s interests in the two power plant joint ventures were sold in 2014. The results of the retail, energy marketing and terminal businesses as well as the Port Reading refining operations have been presented as discontinued operations for all periods in the Statement of Consolidated Income. See also Note 2, Discontinued Operations, Note 4, Dispositions and Note 16, Subsequent Events in the Notes to the Consolidated Financial Statements for additional disclosures related to the divestitures.
	These financial statements have been prepared in accordance with the requirements of the Securities and Exchange Commission (SEC) for interim reporting. As permitted under those rules, certain notes or other financial information that are normally required by U.S. generally accepted accounting principles (GAAP) have been condensed or omitted from these interim financial statements. These statements, therefore, should be read in conjunction with the consolidated financial statements and related notes included in the Corporation’s Annual Report on Form 10-K for the year ended December 31, 2013. Certain information in the financial statements and notes has been reclassified to conform to the current period presentation.
	New Accounting Pronouncements: In April 2014, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) 2014-08, Reporting Discontinued Operations and Disclosures of Disposals of Components of an Entity. The ASU amends the criteria for reporting discontinued operations to include only disposals representing a strategic shift in operations. The ASU also requires expanded disclosures regarding the assets, liabilities, income, and expenses of discontinued operations. This ASU is effective for the Corporation in the first quarter of 2015 and early adoption is permitted. The Corporation is currently assessing the impact of the ASU on its consolidated financial statements.
	In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers, as a new Accounting Standards Codification (ASC) Topic ASC 606. This ASU is effective for the Corporation beginning in the first quarter of 2017 and early adoption is not permitted. The Corporation is currently assessing the impact of the ASU on its consolidated financial statements.

Discontinued_Operations

Discontinued Operations	9 Months Ended
	Sep. 30, 2014
Discontinued Operations And Disposal Groups [Abstract]	'
Discontinued Operations	'
	2. Discontinued Operations
	Downstream businesses reported as discontinued operations in the Statement of Consolidated Income include the retail, energy marketing and terminal businesses as well as the Port Reading refining operations.
	Sales and other operating revenues and Income from discontinued operations were as follows:
		Three Months Ended				Nine Months Ended
		September 30,				September 30,
		2014		2013		2014		2013
		(In millions)
	Sales and other operating revenues	$	3,029	$	5,354	$	9,163	$	18,359
		$	1,024	$	96	$	979	$	292
	Income from discontinued operations before income taxes
	Provision for income taxes		381		34		367		103
	Income from discontinued operations, net of income taxes	$	643	$	62	$	612	$	189
	In September 2014, the Corporation completed the sale of its retail business for cash proceeds of approximately $2.8 billion. This transaction resulted in a pre-tax gain of $954 million ($602 million after income taxes) after deducting the net book value of assets, including $115 million of goodwill. The Corporation recorded pre-tax gains of $183 million ($114 million after income taxes) and $228 million ($143 million after income taxes) in the third quarter of 2014 and 2013, respectively relating to the liquidation of last‑in, first‑out (LIFO) inventories. In addition, the Corporation recorded charges totaling $173 million pre-tax ($110 million after income taxes) in the third quarter of 2014 and $191 million pre‑tax ($120 million after income taxes) in the third quarter of 2013 for impairment, environmental, severance and exit-related activities associated with the divestiture of downstream operations.
	During the nine months ended September 30, 2014 and 2013, the Corporation recognized pre-tax gains of $247 million ($154 million after income taxes) and $446 million pre-tax ($280 million after income taxes), respectively, relating to the liquidation of LIFO inventories. Total charges for impairment, environmental, Port Reading refinery shutdown costs, severance, and exit-related activities associated with the divestiture of downstream operations for the nine month periods ended September 30, 2014 and 2013, were $254 million pre-tax ($161 million after income taxes) and $390 million pre-tax ($245 million after income taxes), respectively. In addition, the Corporation recognized a pre-tax charge of $115 million ($72 million after income taxes) in the second quarter of 2014, related to the termination of lease contracts and the purchase of 180 retail gasoline stations.
	In January 2014, the Corporation’s retail business acquired its partners’ 56% interest in WilcoHess, a retail gasoline joint venture, for approximately $290 million and the settlement of liabilities. In connection with this business combination, the Corporation recorded a pre-tax gain of $39 million ($24 million after income taxes) to remeasure the carrying value of the Corporation’s equity interest in WilcoHess to fair value and recorded goodwill of $115 million. Effective from the acquisition date, Hess consolidated the results of WilcoHess’ operations, which have been included in the results of the discontinued operations reported above. The assets and liabilities acquired from WilcoHess were included in the sale of the retail business in September 2014.

Exit_and_Disposal_Costs

Exit and Disposal Costs	9 Months Ended
	Sep. 30, 2014
Restructuring And Related Activities [Abstract]	'
Exit and Disposal Costs	'
	3. Exit and Disposal Costs
	The following table provides the components of and changes in the Corporation’s restructuring accruals:
			Exploration
			and			Corporate			Discontinued
			Production			and Other			Operations			Total
			(In millions)
	Employee Severance
	Balance at January 1, 2014		$	32		$	32		$	107		$	171
	Provision			19			17			41			77
	Payments			(32	)		(20	)		(60	)		(112	)
	Balance at September 30, 2014			19			29			88			136
	Facility and Other Exit Costs
	Balance at January 1, 2014			53			17			48			118
	Provision			(16	)*		13			47			44
	Payments, settlements and other			(36	)		(12	)		(86	)		(134	)
	Balance at September 30, 2014			1			18			9			28
			$	20		$	47		$	97		$	164
	Total accruals at September 30, 2014
	*	Represents the release from certain leased office space obligations.
	The following table provides the classification of costs and expense reversals associated with the Corporation’s restructuring program:
			Three Months Ended						Nine Months Ended
			September 30,						September 30,
			2014			2013			2014			2013
			(In millions)
	Employee Severance
	Operating costs and expenses		$	1		$	1		$	3		$	45
	Marketing expenses			1			—			2			5
	Exploration expenses, including dry holes and lease impairment			1			1			5			16
	General and administrative expenses			2			9			26			52
	Income from discontinued operations			11			33			41			117
	Total employee severance		$	16		$	44		$	77		$	235
	Facility and Other Exit Costs
	Marketing expenses		$	3		$	—		$	3		$	—
	General and administrative expenses			2			—			(3	)		9
	Depreciation, depletion and amortization			—			—			(3	)		—
	Income from discontinued operations			15			13			47			48
	Total facility and other exit costs		$	20		$	13		$	44		$	57
	The employee severance charges primarily resulted from the Corporation’s divestiture program announced in March 2013. The severance charges were based on probable amounts incurred under ongoing severance arrangements or other statutory requirements, plus amounts earned through September 30, 2014 under enhanced benefit arrangements. The expense associated with the enhanced benefits is recognized ratably over the estimated service period required for the employee to earn the benefit upon termination.
	The Corporation expects to incur additional enhanced severance benefit charges of approximately $1 million beyond the amounts accrued at September 30, 2014. The Corporation’s estimate of employee severance costs could change due to a number of factors, including the number of employees that work through the requisite service date and the timing of when each remaining divestiture occurs.
	For the accrued employee severance at September 30, 2014 totaling $136 million, the Corporation expects to pay approximately 60% in 2014, 35% in 2015 and the remainder in 2016. For the accrued facility and other exit costs totaling $28 million, the Corporation expects to pay approximately 30% in 2014 and the remainder in 2015 and beyond.

Dispositions

Dispositions	9 Months Ended
	Sep. 30, 2014
Business Combinations [Abstract]	'
Dispositions	'
	4. Dispositions
	In the third quarter of 2014, the Corporation completed the sale of its interest in an exploration asset in the United Kingdom North Sea for $53 million which resulted in a pre-tax gain of $33 million ($33 million gain after income taxes) and its joint venture interest in the Bayonne Energy complex for $79 million, which did not result in a gain or loss. In June 2014, the Corporation completed the sale of its joint venture interest in an electric generating facility in Newark, New Jersey for cash proceeds of $320 million, resulting in a pre-tax gain of approximately $13 million ($8 million gain after income taxes). Also in the first six months of 2014, the Corporation completed the sale of a total of approximately 77,000 net acres in the dry gas area of the Utica shale play including related wells and facilities, for total cash proceeds of approximately $1,075 million and recorded a pre-tax gain of $62 million ($35 million gain after income taxes) after deducting the net book value of assets, including allocated goodwill of $11 million.  In April 2014, the Corporation completed the sale of its E&P interests in Thailand for cash proceeds of approximately $805 million.  This transaction resulted in a pre-tax gain of $706 million ($706 million gain after income taxes) after deducting the net book value of assets, including allocated goodwill of $76 million. In the first quarter of 2014, the Corporation completed the sale of its interest in the Pangkah asset, offshore Indonesia for cash proceeds of approximately $650 million. This transaction resulted in a pre-tax gain of $31 million ($10 million loss after income taxes) after deducting the net book value of assets, including allocated goodwill of $56 million. In addition, the Corporation sold an exploration block in Indonesia for a pre-tax loss of $20 million ($11 million gain after income taxes).
	In the second quarter of 2013, the Corporation sold its Russian subsidiary, Samara-Nafta, for cash proceeds of $2.1 billion after working capital and other adjustments. Net proceeds to Hess were approximately $1.9 billion. This transaction resulted in a pre-tax gain of $1,119 million ($1,119 million gain after income taxes). After reduction of the noncontrolling interest holder’s share of $168 million, which was reflected in Net income (loss) attributable to noncontrolling interests, the net gain attributable to the Corporation was $951 million. In March 2013, the Corporation sold its interests in the Azeri-Chirag-Guneshli (ACG) fields (Hess 3%), offshore Azerbaijan in the Caspian Sea, and the associated Baku-Tbilisi-Ceyhan (BTC) oil transportation pipeline company (Hess 2%) for cash proceeds of $884 million. The transaction resulted in a pre-tax gain of $360 million ($360 million after income taxes). In January 2013, the Corporation completed the sale of its interests in the Beryl fields and the Scottish Area Gas Evacuation System (SAGE) in the United Kingdom North Sea for cash proceeds of $442 million. The transaction resulted in a pre-tax gain of $328 million ($323 million after income taxes).

Inventories

Inventories	9 Months Ended
	Sep. 30, 2014
Inventory Disclosure [Abstract]	'
Inventories	'
	5. Inventories
	Inventories consisted of the following:
		September 30,			December 31,
		2014			2013
		(In millions)
	Crude oil	$	326		$	291
	Refined petroleum products and natural gas		217			618
	Less: LIFO adjustment		(44	)		(339	)
			499			570
	Merchandise, materials and supplies		318			384
	Total inventories	$	817		$	954
	Inventories related to the E&P segment were $629 million at September 30, 2014 and $599 million at December 31, 2013.

Property_Plant_and_Equipment

Property, Plant and Equipment	9 Months Ended
	Sep. 30, 2014
Property Plant And Equipment [Abstract]	'
Property, Plant and Equipment	'
	6. Property, Plant and Equipment
	Assets Held for Sale: At December 31, 2013, E&P assets totaling $1,097 million, primarily consisting of the net property, plant and equipment balances as well as allocated goodwill of $76 million, for the Corporation’s assets in Thailand and the Pangkah Field, offshore Indonesia (Hess 75%) were classified as held for sale and are reported within Other current assets in the Consolidated Balance Sheet. In addition, liabilities related to these properties totaling $286 million, primarily consisting of asset retirement obligations and deferred income taxes, are reported within Accrued liabilities. In 2014, the Corporation completed the sale of its interests in Thailand and Pangkah. See Note 4, Dispositions, in the Notes to the Consolidated Financial Statements.
	Capitalized Exploratory Well Costs:  The following table discloses the net changes in capitalized exploratory well costs pending determination of proved reserves for the nine months ended September 30, 2014 (in millions):
	Balance at January 1	$	2,045
	Additions to capitalized exploratory well costs pending the determination of proved reserves		184
	Reclassifications to wells, facilities and equipment based on the determination of proved reserves		(28	)
	Capitalized exploratory well costs charged to expense		(236	)
	Dispositions and other		(57	)
	Balance at September 30, 2014	$	1,908
	The preceding table excludes exploratory dry hole costs of $61 million which were incurred and subsequently expensed in 2014. Capitalized exploratory well costs charged to expense in the second quarter of 2014 included $169 million to write-off a previously capitalized exploration well in the western half of Green Canyon Block 469 in the Gulf of Mexico as further explained below.
	Capitalized exploratory well costs greater than one year old after completion of drilling were $1,737 million at September 30, 2014. Approximately 48% of the capitalized well costs in excess of one year relates to Block WA-390-P, offshore Western Australia, where development planning and commercial activities, including negotiations with potential liquefaction partners, are ongoing. Successful negotiation with a third party liquefaction partner is necessary before the Corporation can negotiate a gas sales agreement and sanction development of the project. Approximately 29% relates to the Stampede Project in the Gulf of Mexico where Hess is operator and owns a 25% working interest. An application to unitize Blocks 468, 512, the western half of 469 and the eastern half of 511 was filed with the Bureau of Safety and Environmental Enforcement in the first quarter of 2014. During the second quarter of 2014, the Corporation received approval to unitize Blocks 468, 512 and the eastern half of 511. As Block 469 was not accepted in the unitized development area, the Corporation expensed the capitalized well on this block in the second quarter.  See also Note 16, Subsequent Events in the Notes to the Consolidated Financial Statements. Approximately 21% relates to offshore Ghana where the Corporation has drilled seven successful exploration wells. Appraisal plans for the seven wells on the block were submitted to the Ghanaian government in June 2013 for approval. Four of the plans were approved and discussions continue with the government on the three remaining appraisal plans. In the third quarter of 2014, the Corporation completed a three well appraisal program in Ghana.  Well results are being evaluated and development planning is progressing.  The remaining 2% of the capitalized well costs in excess of one year relates to projects where further drilling is planned or development planning and other assessment activities are ongoing to determine the economic and operating viability of the projects.

Goodwill

Goodwill	9 Months Ended
	Sep. 30, 2014
Goodwill And Intangible Assets Disclosure [Abstract]	'
Goodwill	'
	7. Goodwill
	The changes in the carrying amount of goodwill are as follows (in millions):
	Balance at January 1, 2014	$	1,869
	Acquisitions		115
	Dispositions		(126	)
	Balance at September 30, 2014	$	1,858
	The increase in goodwill resulted from the Corporation’s first quarter 2014 purchase of WilcoHess, which was subsequently disposed of as part of the sale of the Corporation’s retail business. See Note 2, Discontinued Operations, in the Notes to the Consolidated Financial Statements.

Asset_Retirement_Obligations

Asset Retirement Obligations	9 Months Ended
	Sep. 30, 2014
Asset Retirement Obligation Disclosure [Abstract]	'
Asset Retirement Obligations	'
	8.  Asset Retirement Obligations
	The following table describes changes to the Corporation’s asset retirement obligations for the nine months ended September 30, 2014 and year ended December 31, 2013:
		September 30,			December 31,
		2014			2013
		(In millions)
	Asset retirement obligations at beginning of period	$	2,772		$	2,661
	Liabilities incurred		63			42
	Liabilities settled or disposed of		(345	)		(576	)
	Accretion expense		99			129
	Revisions of estimated liabilities		275			573
	Foreign currency translation		(51	)		(57	)
	Asset retirement obligations at end of period		2,813			2,772
	Less: Current obligations		500			523
	Long-term obligations at end of period	$	2,313		$	2,249
	The revisions of estimated liabilities in 2014 and 2013 primarily reflect increases in estimated abandonment obligations resulting from changes in the expected scope of operations and changes in estimated service and equipment costs.

Debt

Debt	9 Months Ended
	Sep. 30, 2014
Debt Disclosure [Abstract]	'
Debt	'
	9. Debt
	In June 2014, the Corporation issued $600 million of unsecured, fixed-rate notes ($598 million net of discount) comprising $300 million with a coupon of 1.3% and scheduled to mature in June 2017 as well as $300 million with a coupon of 3.5% and scheduled to mature in July 2024. In the first nine months of 2014, the Corporation repaid $553 million of debt, including $250 million of unsecured, fixed-rate notes, $212 million for the payment of various lease obligations primarily to retire retail gasoline station leases and $74 million assumed in the acquisition of WilcoHess. See also Note 2, Discontinued Operations, in the Notes to the Consolidated Financial Statements.

Other_NonOperating_Income

Other Non-Operating Income	9 Months Ended
	Sep. 30, 2014
Other Income And Expenses [Abstract]	'
Other Non-Operating Income	'
	10. Other Non-operating Income
	In the first quarter of 2014, the Corporation recorded a charge of $84 million ($52 million after income taxes) to reduce to fair value its investment in the Bayonne Energy Center (BEC) joint venture (Hess 50%) based on a Level 3 fair value measurement. This charge was included in Other, net in the Statement of Consolidated Income. During the third quarter of 2014, the Corporation divested its interest in the BEC joint venture. See Note 4, Dispositions, in the Notes to the Consolidated Financial Statements.
	Pre-tax foreign currency gains (losses) included in Other, net in the Statement of Consolidated Income amounted to the following:
		Three Months Ended					Nine Months Ended
		September 30,					September 30,
		2014		2013			2014			2013
		(In millions)
	Pre-tax foreign currency gains (losses)	$	19	$	(7	)	$	(6	)	$	(58	)

Retirement_Plans

Retirement Plans	9 Months Ended
	Sep. 30, 2014
Compensation And Retirement Disclosure [Abstract]	'
Retirement Plans	'
	11. Retirement Plans
	Components of net periodic pension cost consisted of the following:
			Three Months Ended						Nine Months Ended
			September 30,						September 30,
			2014			2013			2014			2013
			(In millions)
	Service cost		$	15		$	18		$	40		$	55
	Interest cost			26			22			75			66
	Expected return on plan assets			(41	)		(36	)		(121	)		(105	)
	Amortization of net loss			8			12			23			46
	Settlement loss*			11			—			19			—
	Pension expense		$	19		$	16		$	36		$	62
	*	The Corporation recorded charges related to plan settlements of $11 million ($7 million after income taxes) and $19 million ($12 million after income taxes) for the three and nine months ended September 30, 2014, respectively, due to employee retirements.
	In 2014, the Corporation expects to contribute approximately $70 million to its funded pension plans. Through September 30, 2014, the Corporation contributed approximately $60 million of this amount.

Weighted_Average_Common_Shares

Weighted Average Common Shares and Share Repurchase Plan	9 Months Ended
	Sep. 30, 2014
Earnings Per Share [Abstract]	'
Weighted Average Common Shares and Share Repurchase Plan	'
	12. Weighted Average Common Shares and Share Repurchase Plan
	The net income and weighted average number of common shares used in the basic and diluted earnings per share computations were as follows:
		Three Months Ended					Nine Months Ended
		September 30,					September 30,
		2014		2013			2014		2013
		(In millions, except per share amounts)
	Income from continuing operations, net of income taxes	$	387	$	356		$	1,769	$	3,118
	Less: Net income (loss) attributable to noncontrolling interests		22		(2	)		56		180
	Net income from continuing operations attributable to		365		358			1,713		2,938
	Hess Corporation
	Income from discontinued operations, net of income taxes		643		62			612		189
	Net income attributable to Hess Corporation	$	1,008	$	420		$	2,325	$	3,127
	Weighted average common shares outstanding:
	Basic		300.7		339			308.6		339.3
	Effect of dilutive securities:
	Restricted common stock		1.5		1.4			1.4		1.3
	Stock options		2		1.8			2		1.6
	Performance share units		0.8		1.1			0.7		1.1
	Diluted		305		343.3			312.7		343.3
	Net income attributable to Hess Corporation per share:
	Basic:
	Continuing operations	$	1.21	$	1.06		$	5.55	$	8.66
	Discontinued operations		2.14		0.18			1.99		0.56
	Net income per share	$	3.35	$	1.24		$	7.54	$	9.22
	Diluted:
	Continuing operations	$	1.2	$	1.05		$	5.48	$	8.56
	Discontinued operations		2.11		0.18			1.96		0.55
	Net income per share	$	3.31	$	1.23		$	7.44	$	9.11
	The Corporation granted 1,073,179 shares of restricted stock, 298,222 performance share units (PSUs) and 162,911 stock options during the nine month period ended September 30, 2014 and 1,205,569 shares of restricted stock and 279,093 PSUs for the same period in 2013. The weighted average common shares used in the diluted earnings per share calculations exclude the effect of 124,357 and 1,214,422 stock options for the three and nine months ended September 30, 2014, respectively, as well as 3,680,344 and 4,661,606 stock options for the three and nine months ended September 30, 2013, respectively, because their effect would be anti-dilutive.
	In March 2013, the Corporation announced a board authorized plan to repurchase up to $4 billion of outstanding common stock using proceeds from its announced asset divestiture program. In May 2014, the Corporation increased its board authorized share repurchase program to $6.5 billion. The share repurchase program commenced in August 2013. During the first nine months of 2014, the Corporation purchased 30.1 million shares for a total cost of $2,669 million, at an average cost of $88.67 per share including transaction fees. As of September 30, 2014, the Corporation has approximately $2.3 billion available under its board authorized plan for purchasing additional common shares.

Guarantees_and_Contingencies

Guarantees and Contingencies	9 Months Ended
	Sep. 30, 2014
Commitments And Contingencies Disclosure [Abstract]	'
Guarantees and Contingencies	'
	13.  Guarantees and Contingencies
	The Corporation, along with many companies engaged in refining and marketing of gasoline, has been a party to lawsuits and claims related to the use of methyl tertiary butyl ether (MTBE) in gasoline. A series of similar lawsuits, many involving water utilities or governmental entities, were filed in jurisdictions across the U.S. against producers of MTBE and petroleum refiners who produced gasoline containing MTBE, including the Corporation. The principal allegation in all cases was that gasoline containing MTBE is a defective product and that these parties are strictly liable in proportion to their share of the gasoline market for damage to groundwater resources and are required to take remedial action to ameliorate the alleged effects on the environment of releases of MTBE. The majority of the cases asserted against the Corporation have been settled. In March 2014, the Corporation agreed to settle claims against it arising out of an action brought by the State of New Jersey for approximately $35 million. The settlement has been approved by the trial judge and the Corporation has reserves to fully cover this settlement amount. In June 2014, the Commonwealth of Pennsylvania filed a lawsuit in state court in Pennsylvania alleging that Hess Corporation and all major oil companies with operations in Pennsylvania have damaged the ground waters in Pennsylvania by introducing gasoline with MTBE into the Commonwealth. This action has been removed to the Federal court and has been forwarded to the existing MTBE multidistrict litigation pending in the Southern District of New York. An action brought by the Commonwealth of Puerto Rico also remained unresolved at September 30, 2014. The Corporation has recorded reserves for its estimated liabilities for its unresolved MTBE lawsuits, which are not material to the consolidated financial statements.
	The Corporation is subject to loss contingencies with respect to various claims, lawsuits and other proceedings. The Corporation cannot predict with certainty if, how or when such claims, lawsuits and proceedings will be resolved or what the eventual relief, if any, may be. Numerous issues may need to be resolved, including through lengthy discovery, conciliation and/or arbitration proceedings, or litigation before a loss or range of loss can be reasonably estimated.  Subject to the foregoing, in management’s opinion, based upon currently known facts and circumstances, the outcome of such lawsuits, claims and proceedings is not expected to have a material adverse effect on the financial condition of the Corporation.  However, the Corporation could incur judgments, enter into settlements or revise its opinion regarding the outcome of certain matters, and such developments could have a material adverse effect on its results of operations in the period in which the amounts are accrued and its cash flows in the period in which the amounts are paid.

Segment_Information

Segment Information	9 Months Ended
	Sep. 30, 2014
Segment Reporting [Abstract]	'
Segment Information	'
	14. Segment Information
	The Corporation has substantially completed its transition to a pure play E&P company. The results of operations for its retail, energy marketing, terminal and refining businesses have been classified as discontinued operations. See also Note 1, Basis of Presentation, Note 2, Discontinued Operations and Note 16, Subsequent Events in the Notes to the Consolidated Financial Statements for additional disclosures related to these divestures. The Corporation currently has one operating segment, Exploration and Production, and a Corporate, Interest and Other segment, which includes its energy trading joint venture, Hess Energy Trading Corporation (HETCO).  In October 2014, the Corporation reached an agreement to sell its interest in HETCO, and as a result, it will be reported as discontinued operations beginning with fourth quarter 2014 reporting.
	The Corporation’s results by segment were as follows:
		Three Months Ended						Nine Months Ended
		September 30,						September 30,
		2014			2013			2014			2013
		(In millions)
	Sales and other operating revenues:
	Exploration and Production	$	2,678		$	2,706		$	8,180		$	9,183
	Corporate, Interest and Other		67			14			183			74
	Total	$	2,745		$	2,720		$	8,363		$	9,257
	Net income (loss) attributable to Hess Corporation:
	Exploration and Production	$	441		$	455		$	2,006		$	3,274
	Corporate, Interest and Other		(76	)		(97	)		(293	)		(336	)
	Income from continuing operations		365			358			1,713			2,938
	Discontinued operations		643			62			612			189
	Total	$	1,008		$	420		$	2,325		$	3,127
	Identifiable assets by operating segment were as follows:
		September 30,			December 31,
		2014			2013
		(In millions)
	Exploration and Production	$	36,895		$	37,863
	Corporate, Interest and Other		3,708			2,144
	Continuing operations		40,603			40,007
	Discontinued operations		372			2,747
	Total	$	40,975		$	42,754

Financial_Risk_Management_and_

Financial Risk Management and Trading Activities	9 Months Ended
	Sep. 30, 2014
Derivative Instruments And Hedging Activities Disclosure [Abstract]	'
Financial Risk Management and Trading Activities	'
	15. Financial Risk Management and Trading Activities
	In the normal course of its business, the Corporation is exposed to commodity risks related to changes in the prices of crude oil and natural gas as well as changes in interest rates and foreign currency values.  In the disclosures that follow, risk management activities refer to the mitigation of these risks through hedging activities.  The Corporation is also exposed to commodity price risks primarily related to crude oil, natural gas, refined petroleum products and electricity, as well as foreign currency values from a 50% voting interest in a consolidated energy trading joint venture. See also Note 16, Subsequent Events in the Notes to the Consolidated Financial Statements.
	In conjunction with the sale of the energy marketing business in the fourth quarter of 2013, certain derivative contracts, including new transactions following the closing date, (the “delayed transfer derivative contracts”) were not transferred to the acquirer, Direct Energy, a North American subsidiary of Centrica plc (Centrica), as required customer or regulatory consents had not been obtained. However, the agreement entered into between Hess and Direct Energy on the closing date transferred all economic risks and rewards of the energy marketing business, including the ownership of the delayed transfer derivative contracts, to Direct Energy. The transfer of these remaining contracts was completed during 2014.
	The Corporation maintains a control environment for all of its risk management and trading activities under the direction of its chief risk officer and through its corporate risk policy, which the Corporation’s senior management has approved. Controls include volumetric, term and value at risk limits. The chief risk officer must approve the trading of new instruments and commodities. Risk limits are monitored and reported on a daily basis to business units and senior management. The Corporation’s risk management department also performs independent price verifications (IPVs) of sources of fair values and validations of valuation models. The Corporation’s treasury department is responsible for administering foreign exchange rate and interest rate hedging programs using similar controls and processes, where applicable.
	The Corporation’s risk management department, in performing the IPV procedures, utilizes independent sources and valuation models that are specific to the individual contracts and pricing locations to identify positions that require adjustments to better reflect the market. This review is performed quarterly and the results are presented to the chief risk officer and senior management. The IPV process considers the reliability of the pricing services through assessing the number of available quotes, the frequency at which data is available and, where appropriate, the comparability between pricing sources.
	The following is a description of the Corporation’s activities that use derivatives as part of their operations and strategies. Derivatives include both financial instruments and forward purchase and sale contracts. Gross notional amounts of both long and short positions are presented in the volume tables beginning below. These amounts include long and short positions that offset in closed positions and have not reached contractual maturity. Gross notional amounts do not quantify risk or represent assets or liabilities of the Corporation, but are used in the calculation of cash settlements under the contracts.
	Financial Risk Management Activities: Financial risk management activities include transactions designed to reduce risk in the selling prices of crude oil or natural gas produced by the Corporation or to reduce exposure to foreign currency or interest rate movements. Generally, futures, swaps or option strategies may be used to fix the forward selling price of a portion of the Corporation’s crude oil or natural gas production. Forward contracts may also be used to purchase certain currencies in which the Corporation does business with the intent of reducing exposure to foreign currency fluctuations. These forward contracts comprise various currencies, primarily the British Pound and Danish Krone. Interest rate swaps may be used to convert interest payments on certain long-term debt from fixed to floating rates.
	The gross volumes of the risk management derivative contracts outstanding were as follows:
			September 30,			December 31,
			2014			2013
	Commodity, primarily crude oil (millions of barrels)			15			9
	Foreign exchange (millions of USD *)		$	1,197		$	220
	Interest rate swaps (millions of USD)		$	1,300		$	865
	*	Denominated in U.S. dollars (USD).
	In the fourth quarter of 2013, the Corporation entered into Brent crude oil fixed-price swap contracts to hedge 25,000 barrels of oil per day (bopd) for calendar year 2014. This 2014 hedging program was extended by 5,000 bopd in the first quarter of 2014 and an additional 10,000 bopd in the second quarter of 2014. These Brent crude oil hedges are at an overall average price of $109.17 per barrel. In addition, during the second quarter of 2014 the Corporation entered into West Texas Intermediate (WTI) crude oil fixed-price swap contracts to hedge 20,000 bopd for the remainder of 2014 at an average price of $100.41 per barrel. In 2013, the Corporation had Brent crude oil fixed-price swap contracts to hedge 90,000 bopd of crude oil sales volumes at an average price of approximately $109.70 per barrel.
	Realized gains from E&P crude oil hedging activities increased E&P Sales and other operating revenues by $27 million and $24 million for the three and nine months ended September 30, 2014, respectively ($17 million and $15 million after income taxes, respectively) and $2 million and $36 million for the three and nine months ended September 30, 2013, respectively ($1 million and $23 million after income taxes, respectively). At September 30, 2014, the after-tax deferred gains in Accumulated other comprehensive income (loss) related to crude oil hedges were $36 million, which will be reclassified into Sales and other operating revenues in the Statement of Consolidated Income during the remainder of 2014 as the hedged crude oil sales are recognized in earnings. Gains from ineffectiveness of crude oil hedges, that were recognized immediately in Sales and other operating revenues, were approximately $6 million and $2 million for the three and nine months ended September 30, 2014, respectively, and a loss of $17 million and a gain of $1 million for the three and nine months ended September 30, 2013, respectively.
	At September 30, 2014 and December 31, 2013, the Corporation had interest rate swaps with gross notional amounts of $1,300 million and $865 million, respectively, which were designated as fair value hedges. Changes in the fair value of interest rate swaps and the hedged fixed-rate debt are recorded in Interest expense in the Statement of Consolidated Income. For the three months ended September 30, 2014 and 2013, the Corporation recorded a decrease of approximately $10 million and an increase of $1 million (excluding accrued interest), respectively, in the fair value of interest rate swaps and a corresponding adjustment in the carrying value of the hedged fixed-rate debt. For the nine months ended September 30, 2014 and 2013, the Corporation recorded decreases of $5 million and $27 million (excluding accrued interest), respectively, in the fair value of interest rate swaps and a corresponding adjustment in the carrying value of the hedged fixed-rate debt.
	Gains or losses on foreign exchange contracts that are not designated as hedges are recognized immediately in Other, net in Revenues and non-operating income in the Statement of Consolidated Income.
	Net realized and unrealized pre-tax gains (losses) on derivative contracts used in Financial Risk Management activities and not designated as hedges amounted to the following:
			Three Months Ended						Nine Months Ended
			September 30,						September 30,
			2014			2013			2014			2013
			(In millions)
	Foreign exchange		$	81		$	4		$	68		$	(36	)
	Commodity			4			—			7			—
	Total		$	85		$	4		$	75		$	(36	)
	Trading Activities: Trading activities are conducted through an energy trading joint venture in which the Corporation has a 50% voting interest. This joint venture generates earnings through various strategies primarily using energy-related commodities, securities and derivatives. The information that follows represents 100% of the energy trading joint venture as well as the Corporation’s proprietary trading activities, which ceased in 2013.
	The gross volumes of derivative contracts outstanding related to trading activities were as follows:
			September 30,			December 31,
			2014			2013
	Commodity
	Crude oil and refined petroleum products (millions of barrels)			1,810			1,815
	Natural gas (millions of mcf)			2,519			2,735
	Electricity (millions of megawatt hours)			1			1
	Foreign exchange (millions of USD)		$	55		$	52
	Interest rate (millions of USD)		$	29		$	—
	Equity securities (millions of shares)			7			11
	Pre-tax unrealized and realized gains (losses) recorded in the Statement of Consolidated Income from trading activities amounted to the following:
			Three Months Ended						Nine Months Ended
			September 30,						September 30,
			2014			2013			2014			2013
			(In millions)
	Commodity		$	52		$	6		$	147		$	53
	Foreign exchange			2			(1	)		1			—
	Equity and other			14			9			34			17
	Total *		$	68		$	14		$	182		$	70
	*	The unrealized pre-tax gains and losses included in earnings were primarily reflected in Sales and other operating revenues.
	Fair Value Measurements: The Corporation generally enters into master netting arrangements to mitigate legal and counterparty credit risk. Master netting arrangements are generally accepted overarching master contracts that govern all individual transactions with the same counterparty entity as a single legally enforceable agreement. The U.S. Bankruptcy Code provide for the enforcement of certain termination and netting rights under certain types of contracts upon the bankruptcy filing of a counterparty, commonly known as the safe harbor provisions. If a master netting arrangement provides for termination and netting upon the counterparty’s bankruptcy, these rights are generally enforceable with respect to safe harbor transactions. If these arrangements provide the right of offset and the Corporation’s intent and practice is to offset amounts in the case of such a termination, the Corporation’s policy is to record the fair value of derivative assets and liabilities on a net basis.
	In the normal course of business, the Corporation relies on legal and credit risk mitigation clauses providing for adequate credit assurance as well as close-out netting, including two-party netting and single counterparty multilateral netting. As applied to the Corporation, two-party netting is the right to net amounts owing under safe harbor transactions between a single defaulting counterparty entity and a single Hess entity, and single counterparty multilateral netting is the right to net amounts owing under safe harbor transactions among a single defaulting counterparty entity and multiple Hess entities. The Corporation is reasonably assured that these netting rights would be upheld in a bankruptcy proceeding in the U.S. in which the defaulting counterparty is a debtor under the U.S. Bankruptcy Code.
	The following table provides information about the effect of netting arrangements on the presentation of the Corporation’s physical and financial derivative assets and (liabilities) that are measured at fair value, with the effect of “single counterparty multilateral netting” being included in column (v):
						Gross Amounts Offset
						in the Consolidated
						Balance Sheet
						Physical						Net Amounts			Gross Amounts
						Derivative						Presented in			Not Offset in
						and						the			the
			Gross			Financial			Cash			Consolidated			Consolidated			Net
			Amounts			Instruments			Collateral (a)			Balance Sheet			Balance Sheet			Amounts
			(i)			(ii)			(iii)			(iv)=)+(ii)+(iii)			(v)			(vi)=v)+(v)
			(In millions)
	30-Sep-14
	Assets
	Derivative contracts
Commodity		$	3,137		$	(2,797	)	$	(31	)	$	309		$	(1	)	$	308
Interest rate and other			88			(7	)		(2	)		79			(2	)		77
Counterparty netting			—			(57	)		—			(57	)		—			(57	)
Total derivative contracts		$	3,225		$	(2,861	)	$	(33	)	$	331		$	(3	)	$	328
Liabilities
Derivative contracts
Commodity		$	(3,207	)	$	2,797		$	98		$	(312	)	$	1		$	(311	)
Other			(13	)		7			—			(6	)		2			(4	)
Counterparty netting			—			57			—			57			—			57
Total derivative contracts		$	(3,220	)	$	2,861		$	98		$	(261	)	$	3		$	(258	)
December 31, 2013 (b)
Assets
Derivative contracts
Commodity		$	3,086		$	(1,867	)	$	(79	)	$	1,140		$	(41	)	$	1,099
Interest rate and other			51			(10	)		—			41			(3	)		38
Counterparty netting			—			(206	)		—			(206	)		—			(206	)
Total derivative contracts		$	3,137		$	(2,083	)	$	(79	)	$	975		$	(44	)	$	931
Liabilities
Derivative contracts
Commodity		$	(3,212	)	$	1,867		$	168		$	(1,177	)	$	41		$	(1,136	)
Other			(12	)		10			—			(2	)		3			1
Counterparty netting			—			206			—			206			—			206
Total derivative contracts		$	(3,224	)	$	2,083		$	168		$	(973	)	$	44		$	(929	)
(a)	All cash collateral was offset in the Consolidated Balance Sheet.
(b)	Assets and liabilities in 2013 include amounts relating to the divested energy marketing business.
The net assets and liabilities that were offset in the Consolidated Balance Sheet as reflected in column (iv) of the table above were primarily included in Accounts receivable – Trade and Accounts payable, respectively. Included in these net amounts were the assets and liabilities related to the Corporation’s discontinued operations of approximately $1 million and $4 million, respectively, as of September 30, 2014, and $612 million and $620 million, respectively, as of December 31, 2013.
The table below reflects the gross and net fair values of the risk management and trading derivative instruments and, at December 31, 2013 also includes energy marketing risk management derivative instruments:
		Accounts			Accounts
		Receivable			Payable
		(In millions)
September 30, 2014
Derivative contracts designated as hedging instruments
Commodity		$	69		$	—
Interest rate and other			29			(4	)
Total derivative contracts designated as hedging instruments			98			(4	)
Derivative contracts not designated as hedging instruments (a)
Commodity			3,068			(3,207	)
Foreign exchange			49			(1	)
Equity and other			10			(8	)
Total derivative contracts not designated as hedging instruments			3,127			(3,216	)
			3,225			(3,220	)
Gross fair value of derivative contracts
Master netting arrangements			(2,861	)		2,861
Cash collateral (received) posted			(33	)		98
Net fair value of derivative contracts		$	331		$	(261	)
December 31, 2013 (b)
Derivative contracts designated as hedging instruments
Commodity		$	11		$	(3	)
Interest rate and other			36			(1	)
Total derivative contracts designated as hedging instruments			47			(4	)
Derivative contracts not designated as hedging instruments (a)
Commodity			3,075			(3,209	)
Foreign exchange			2			(3	)
Other			13			(8	)
Total derivative contracts not designated as hedging instruments			3,090			(3,220	)
Gross fair value of derivative contracts			3,137			(3,224	)
Master netting arrangements			(2,083	)		2,083
Cash collateral (received) posted			(79	)		168
Net fair value of derivative contracts		$	975		$	(973	)
(a)	Includes trading derivatives and derivatives used for risk management.
(b)	Assets and liabilities in 2013 include amounts relating to the divested energy marketing business.
The Corporation determines fair value in accordance with the fair value measurements accounting standard (Accounting Standards Codification 820—Fair Value Measurements and Disclosures), which established a hierarchy that categorizes the sources of inputs, which generally range from quoted prices for identical instruments in a principal trading market (Level 1) to estimates determined using related market data (Level 3). Measurements derived indirectly from observable inputs or from quoted prices from markets that are less liquid are considered Level 2.
When Level 1 inputs are available within a particular market, those inputs are selected for determination of fair value over Level 2 or 3 inputs in the same market. To value derivatives that are characterized as Level 2 and 3, the Corporation uses observable inputs for similar instruments that are available from exchanges, pricing services or broker quotes. These observable inputs may be supplemented with other methods, including internal extrapolation or interpolation, that result in the most representative prices for instruments with similar characteristics. Multiple inputs may be used to measure fair value, however, the level of fair value for each physical derivative and financial asset or liability presented below is based on the lowest significant input level within this fair value hierarchy.
The following table provides the Corporation’s net physical derivative and financial assets and (liabilities) that are measured at fair value based on this hierarchy:
											Counterparty
		Level 1			Level 2			Level 3			netting			Collateral			Balance
		(In millions)
September 30, 2014
Assets
Derivative contracts
Commodity		$	210		$	187		$	120		$	(177	)	$	(31	)	$	309
Interest rate and other			5			77			—			(1	)		(2	)		79
Collateral and counterparty netting			(53	)		(4	)		—			—			—			(57	)
Total derivative contracts			162			260			120			(178	)		(33	)		331
Other assets measured at fair value on a			33			—			—			—			—			33
recurring basis
Total assets measured at fair value		$	195		$	260		$	120		$	(178	)	$	(33	)	$	364	(a)
on a recurring basis
Liabilities
Derivative contracts
Commodity		$	(226	)	$	(346	)	$	(15	)	$	177		$	98		$	(312	)
Other			(2	)		—			(5	)		1			—			(6	)
Collateral and counterparty netting			53			4			—			—			—			57
Total derivative contracts			(175	)		(342	)		(20	)		178			98			(261	)
Other liabilities measured at			(31	)		—			—			—			—			(31	)
fair value on a recurring basis
Total liabilities measured at		$	(206	)	$	(342	)	$	(20	)	$	178		$	98		$	(292	)(b)
fair value on a recurring basis
Other fair value measurement disclosures		$	—		$	(7,307	)	$	—		$	—		$	—		$	(7,307	)
Long-term debt (c)
											Counterparty
		Level 1			Level 2			Level 3			netting			Collateral			Balance
		(In millions)
December 31, 2013 (d)
Assets
Derivative contracts
Commodity		$	254		$	579		$	494		$	(108	)	$	(79	)	$	1,140
Interest rate and other			2			37			3			(1	)		—			41
Collateral and counterparty netting			(15	)		(191	)		—			—			—			(206	)
Total derivative contracts			241			425			497			(109	)		(79	)		975
Other assets measured at fair value on a			—			—			—			—			—			—
recurring basis
Total assets measured at fair value		$	241		$	425		$	497		$	(109	)	$	(79	)	$	975
on a recurring basis
Liabilities
Derivative contracts
Commodity		$	(97	)	$	(1,071	)	$	(285	)	$	108		$	168		$	(1,177	)
Other			—			(3	)		—			1			—			(2	)
Collateral and counterparty netting			15			191			—			—			—			206
Total derivative contracts			(82	)		(883	)		(285	)		109			168			(973	)
Other liabilities measured at			(31	)		—			—			—			—			(31	)
fair value on a recurring basis
Total liabilities measured at		$	(113	)	$	(883	)	$	(285	)	$	109		$	168		$	(1,004	)
fair value on a recurring basis
Other fair value measurement disclosures		$	—		$	(6,641	)	$	—		$	—		$	—		$	(6,641	)
Long-term debt (c)
(a)	Includes a total of $162 million of Level 1, $260 million of Level 2 and $119 million of Level 3 assets that relate to the Corporation’s continuing operations.
(b)	Includes a total of $174 million of Level 1, $341 million of Level 2 and $18 million of Level 3 liabilities that relate to the Corporation’s continuing operations.
(c)	Long-term debt, including current maturities, had a carrying value of $5,996 million and $5,798 million at September 30, 2014 and December 31, 2013, respectively.
(d)	Assets and liabilities in 2013 include amounts relating to the divested energy marketing business.
In addition to the financial assets and liabilities disclosed in the tables above, the Corporation had other short-term financial instruments, primarily cash equivalents and accounts receivable and payable, for which the carrying value approximated their fair value at September 30, 2014 and December 31, 2013.
The following table provides net transfers into and out of each level of the fair value hierarchy:
		Three Months Ended						Nine Months Ended
		September 30,						September 30,
		2014			2013			2014			2013
		(In millions)
Transfers into Level 1		$	40		$	18		$	30		$	(1	)
Transfers out of Level 1			2			15			1			77
		$	42		$	33		$	31		$	76
		$	(6	)	$	(11	)	$	(22	)	$	(103	)
Transfers into Level 2
Transfers out of Level 2			(106	)		(2	)		(102	)		16
		$	(112	)	$	(13	)	$	(124	)	$	(87	)
Transfers into Level 3		$	67		$	(14	)	$	74		$	(12	)
Transfers out of Level 3			3			(6	)		19			23
		$	70		$	(20	)	$	93		$	11
The Corporation’s policy is to recognize transfers in and transfers out as of the end of the reporting period. Transfers between levels result from the passage of time as contracts move closer to their maturities, fluctuations in the market liquidity for certain contracts and/or changes in the level of significance of fair value measurement inputs.
The following table provides changes in physical derivatives and financial assets and (liabilities) primarily related to commodities that are measured at fair value based on Level 3 inputs:
		Three Months Ended						Nine Months Ended
		September 30,						September 30,
		2014			2013			2014			2013
		(In millions)
Balance at beginning of period		$	40		$	107		$	212		$	141
Unrealized pre-tax gains (losses) included in earnings (a)			(10	)		(61	)		(310	)		(122	)
Purchases (b)			7			4			18			44
Sales (b)			(7	)		(1	)		(17	)		(32	)
Settlements (c)			—			(7	)		104			(20	)
Transfers into Level 3			67			(14	)		74			(12	)
Transfers out of Level 3			3			(6	)		19			23
Balance at end of period		$	100		$	22		$	100		$	22
(a)	The unrealized pre-tax gains and (losses) included in earnings were reflected in Sales and other operating revenues and Income from discontinued operations in the Statement of Consolidated Income.
(b)	Purchases and sales primarily represent option premiums paid or received, respectively, during the reporting period and were reflected in Sales and other operating revenues and Income from discontinued operations in the Statement of Consolidated Income.
(c)	Settlements represent realized gains and (losses) on derivatives settled during the reporting period and were reflected in Sales and other operating revenues and Income from discontinued operations in the Statement of Consolidated Income.
The significant unobservable inputs used in Level 3 fair value measurements for the Corporation’s physical commodity contracts and derivative instruments primarily include less liquid delivered locations for physical commodity contracts or volatility assumptions for out-of-the-money options. The following table provides information about the Corporation's significant recurring unobservable inputs used in the Level 3 fair value measurements. Natural gas contracts are usually quoted and transacted using basis pricing relative to an active pricing location (e.g. Henry Hub), for which price inputs represent the approximate value of differences in geography and local market conditions. All other price inputs in the table below represent full contract prices. Significant changes in any of the inputs, independently or correlated, may result in a different fair value.
		Unit of		Range /
		Measurement		Weighted Average
30-Sep-14
Assets
Commodity contracts with a fair value of $120 million
Contract prices
Crude oil and refined petroleum products		$ / bbl (a)		$73.58 - 119.76 / 95.97
Basis prices
Natural gas		$ / MMBTU (c)		$(0.65) - 4.01 / 3.57
Contract volatilities
Crude oil and refined petroleum products		%		16.00 - 19.00 / 17.00
Natural gas		%		18.00 - 39.00 / 29.00
Liabilities
Commodity contracts with a fair value of $15 million
Contract prices
Crude oil and refined petroleum products		$ / bbl (a)		$82.54 - 122.95 / 102.77
Contract volatilities
Crude oil and refined petroleum products		%		16.00 - 20.00 / 19.00
December 31, 2013 (d)
Assets
Commodity contracts with a fair value of $494 million
Contract prices
Crude oil and refined petroleum products		$ / bbl (a)		$78.45 - 228.86 / 118.68
Electricity		$ / MWH (b)		$19.52 - 165.75 / 45.76
Basis prices
Natural gas		$ / MMBTU (c)		$(4.99) - 18.10 / 0.23
Contract volatilities
Crude oil and refined petroleum products		%		16.00 - 18.00 / 17.00
Natural gas		%		17.00 - 35.00 / 22.00
Electricity		%		16.00 - 36.00 / 23.00
Liabilities
Commodity contracts with a fair value of $285 million
Contract prices
Crude oil and refined petroleum products		$ / bbl (a)		$57.45 - 183.89 / 122.54
Electricity		$ / MWH (b)		$26.48 - 155.33 / 43.12
Basis prices
Natural gas		$ / MMBTU (c)		$(1.90) - 18.00 / (0.62)
Contract volatilities
Crude oil and refined petroleum products		%		16.00 - 17.00 / 17.00
Natural gas		%		34.00 - 35.00 / 35.00
Electricity		%		16.00 - 36.00 / 22.00
(a)	Price per barrel.
(b)	Price per megawatt hour.
(c)	Price per million British thermal unit.
(d)	Assets and liabilities in 2013 include amounts relating to the divested energy marketing business.
Note:	Fair value measurement for all recurring inputs was performed using a combination of income and market approach techniques.
Credit Risk: The Corporation is exposed to credit risks that may at times be concentrated with certain counterparties, groups of counterparties or customers. Accounts receivable are generated from a diverse domestic and international customer base. As of September 30, 2014, the Corporation’s net Accounts receivable – Trade related to continuing operations were concentrated with the following counterparty industry segments: Integrated Oil Companies—32%, Financial Institutions—22%, Trading Companies—15%, Refiners—12% and Government Entities—9%. As of December 31, 2013, the Corporation’s net Accounts receivable—Trade were concentrated as follows: Integrated Oil Companies—45%, Refiners—18%, Financial Institutions—14%, Government Entities—8% and Trading Companies—7%. The Corporation reduces its risk related to certain counterparties by using master netting arrangements and requiring collateral, generally cash or letters of credit. The Corporation records the cash collateral received or posted as an offset to the fair value of derivatives executed with the same counterparty. At September 30, 2014 and December 31, 2013, the Corporation held cash from counterparties of $33 million and $79 million, respectively. The Corporation posted cash to counterparties at September 30, 2014 and December 31, 2013, of $98 million and $168 million, respectively.
The Corporation had outstanding letters of credit totaling $169 million and $410 million at September 30, 2014 and December 31, 2013, respectively. Certain of the Corporation’s agreements also contain contingent collateral provisions that could require the Corporation to post additional collateral if the Corporation’s credit rating declines. As of September 30, 2014, the net liability related to both realized and unrealized derivative contracts with contingent collateral provisions was approximately $52 million ($281 million at December 31, 2013). There was no cash collateral posted on those derivatives at September 30, 2014 ($31 million at December 31, 2013). At September 30, 2014 and at December 31, 2013, all three major credit rating agencies that rate the Corporation’s debt had assigned an investment grade rating. If one of the three agencies were to downgrade the Corporation’s rating to below investment grade, the Corporation would be required to post additional collateral of approximately $52 million at September 30, 2014 and $134 million at December 31, 2013.

Subsequent_Events

Subsequent Events	9 Months Ended
	Sep. 30, 2014
Subsequent Events [Abstract]	'
Subsequent Events	'
	16.  Subsequent Events
	In October 2014, the Corporation and its co‑owners agreed to proceed with the development of the Stampede Field (Hess 25%) located in Green Canyon Blocks 468, 511 and 512 in the Gulf of Mexico.  In October 2014, the Corporation also reached an agreement to sell its interest in its energy trading joint venture, HETCO.  This transaction is expected to close in the first quarter of 2015.

Basis_of_Presentation_Policies

Basis of Presentation (Policies)	9 Months Ended
	Sep. 30, 2014
Accounting Policies [Abstract]	'
New Accounting Pronouncements	'
	New Accounting Pronouncements: In April 2014, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) 2014-08, Reporting Discontinued Operations and Disclosures of Disposals of Components of an Entity. The ASU amends the criteria for reporting discontinued operations to include only disposals representing a strategic shift in operations. The ASU also requires expanded disclosures regarding the assets, liabilities, income, and expenses of discontinued operations. This ASU is effective for the Corporation in the first quarter of 2015 and early adoption is permitted. The Corporation is currently assessing the impact of the ASU on its consolidated financial statements.
	In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers, as a new Accounting Standards Codification (ASC) Topic ASC 606. This ASU is effective for the Corporation beginning in the first quarter of 2017 and early adoption is not permitted. The Corporation is currently assessing the impact of the ASU on its consolidated financial statements.

Discontinued_Operations_Tables

Discontinued Operations (Tables)	9 Months Ended
	Sep. 30, 2014
Discontinued Operations And Disposal Groups [Abstract]	'
Summary of Sales and Other Operating Revenues and Income from Discontinued Operations	'
	Sales and other operating revenues and Income from discontinued operations were as follows:
		Three Months Ended				Nine Months Ended
		September 30,				September 30,
		2014		2013		2014		2013
		(In millions)
	Sales and other operating revenues	$	3,029	$	5,354	$	9,163	$	18,359
		$	1,024	$	96	$	979	$	292
	Income from discontinued operations before income taxes
	Provision for income taxes		381		34		367		103
	Income from discontinued operations, net of income taxes	$	643	$	62	$	612	$	189

Exit_and_Disposal_Costs_Tables

Exit and Disposal Costs (Tables)	9 Months Ended
	Sep. 30, 2014
Restructuring And Related Activities [Abstract]	'
Components of and Changes in Restructuring Accruals	'
	The following table provides the components of and changes in the Corporation’s restructuring accruals:
			Exploration
			and			Corporate			Discontinued
			Production			and Other			Operations			Total
			(In millions)
	Employee Severance
	Balance at January 1, 2014		$	32		$	32		$	107		$	171
	Provision			19			17			41			77
	Payments			(32	)		(20	)		(60	)		(112	)
	Balance at September 30, 2014			19			29			88			136
	Facility and Other Exit Costs
	Balance at January 1, 2014			53			17			48			118
	Provision			(16	)*		13			47			44
	Payments, settlements and other			(36	)		(12	)		(86	)		(134	)
	Balance at September 30, 2014			1			18			9			28
			$	20		$	47		$	97		$	164
	Total accruals at September 30, 2014
	*	Represents the release from certain leased office space obligations.
Components of Costs and Expense Reversals Associated with Corporation's Restructuring Program	'
	The following table provides the classification of costs and expense reversals associated with the Corporation’s restructuring program:
			Three Months Ended						Nine Months Ended
			September 30,						September 30,
			2014			2013			2014			2013
			(In millions)
	Employee Severance
	Operating costs and expenses		$	1		$	1		$	3		$	45
	Marketing expenses			1			—			2			5
	Exploration expenses, including dry holes and lease impairment			1			1			5			16
	General and administrative expenses			2			9			26			52
	Income from discontinued operations			11			33			41			117
	Total employee severance		$	16		$	44		$	77		$	235
	Facility and Other Exit Costs
	Marketing expenses		$	3		$	—		$	3		$	—
	General and administrative expenses			2			—			(3	)		9
	Depreciation, depletion and amortization			—			—			(3	)		—
	Income from discontinued operations			15			13			47			48
	Total facility and other exit costs		$	20		$	13		$	44		$	57

Inventories_Tables

Inventories (Tables)	9 Months Ended
	Sep. 30, 2014
Inventory Disclosure [Abstract]	'
Inventories	'
	Inventories consisted of the following:
		September 30,			December 31,
		2014			2013
		(In millions)
	Crude oil	$	326		$	291
	Refined petroleum products and natural gas		217			618
	Less: LIFO adjustment		(44	)		(339	)
			499			570
	Merchandise, materials and supplies		318			384
	Total inventories	$	817		$	954

Property_Plant_and_Equipment_T

Property, Plant and Equipment (Tables)	9 Months Ended
	Sep. 30, 2014
Property Plant And Equipment [Abstract]	'
Net Changes in Capitalized Exploratory Well Costs	'
	Capitalized Exploratory Well Costs:  The following table discloses the net changes in capitalized exploratory well costs pending determination of proved reserves for the nine months ended September 30, 2014 (in millions):
	Balance at January 1	$	2,045
	Additions to capitalized exploratory well costs pending the determination of proved reserves		184
	Reclassifications to wells, facilities and equipment based on the determination of proved reserves		(28	)
	Capitalized exploratory well costs charged to expense		(236	)
	Dispositions and other		(57	)
	Balance at September 30, 2014	$	1,908

Goodwill_Tables

Goodwill (Tables)	9 Months Ended
	Sep. 30, 2014
Goodwill And Intangible Assets Disclosure [Abstract]	'
Changes in Carrying Amount of Goodwill	'
	The changes in the carrying amount of goodwill are as follows (in millions):
	Balance at January 1, 2014	$	1,869
	Acquisitions		115
	Dispositions		(126	)
	Balance at September 30, 2014	$	1,858

Asset_Retirement_Obligations_T

Asset Retirement Obligations (Tables)	9 Months Ended
	Sep. 30, 2014
Asset Retirement Obligation Disclosure [Abstract]	'
Changes to Corporation's Asset Retirement Obligations	'
	The following table describes changes to the Corporation’s asset retirement obligations for the nine months ended September 30, 2014 and year ended December 31, 2013:
		September 30,			December 31,
		2014			2013
		(In millions)
	Asset retirement obligations at beginning of period	$	2,772		$	2,661
	Liabilities incurred		63			42
	Liabilities settled or disposed of		(345	)		(576	)
	Accretion expense		99			129
	Revisions of estimated liabilities		275			573
	Foreign currency translation		(51	)		(57	)
	Asset retirement obligations at end of period		2,813			2,772
	Less: Current obligations		500			523
	Long-term obligations at end of period	$	2,313		$	2,249

Other_NonOperating_Income_Tabl

Other Non-Operating Income (Tables)	9 Months Ended
	Sep. 30, 2014
Other Income And Expenses [Abstract]	'
Pre-Tax Foreign Currency Gains (Losses)	'
	Pre-tax foreign currency gains (losses) included in Other, net in the Statement of Consolidated Income amounted to the following:
		Three Months Ended					Nine Months Ended
		September 30,					September 30,
		2014		2013			2014			2013
		(In millions)
	Pre-tax foreign currency gains (losses)	$	19	$	(7	)	$	(6	)	$	(58	)

Retirement_Plans_Tables

Retirement Plans (Tables)	9 Months Ended
	Sep. 30, 2014
Compensation And Retirement Disclosure [Abstract]	'
Components of Net Periodic Pension Cost	'
	Components of net periodic pension cost consisted of the following:
			Three Months Ended						Nine Months Ended
			September 30,						September 30,
			2014			2013			2014			2013
			(In millions)
	Service cost		$	15		$	18		$	40		$	55
	Interest cost			26			22			75			66
	Expected return on plan assets			(41	)		(36	)		(121	)		(105	)
	Amortization of net loss			8			12			23			46
	Settlement loss*			11			—			19			—
	Pension expense		$	19		$	16		$	36		$	62
	*	The Corporation recorded charges related to plan settlements of $11 million ($7 million after income taxes) and $19 million ($12 million after income taxes) for the three and nine months ended September 30, 2014, respectively, due to employee retirements.

Weighted_Average_Common_Shares1

Weighted Average Common Shares and Share Repurchase Plan (Tables)	9 Months Ended
	Sep. 30, 2014
Earnings Per Share [Abstract]	'
Net Income and Weighted Average Number of Common Shares Used in Basic and Diluted Earnings Per Share Computations	'
	The net income and weighted average number of common shares used in the basic and diluted earnings per share computations were as follows:
		Three Months Ended					Nine Months Ended
		September 30,					September 30,
		2014		2013			2014		2013
		(In millions, except per share amounts)
	Income from continuing operations, net of income taxes	$	387	$	356		$	1,769	$	3,118
	Less: Net income (loss) attributable to noncontrolling interests		22		(2	)		56		180
	Net income from continuing operations attributable to		365		358			1,713		2,938
	Hess Corporation
	Income from discontinued operations, net of income taxes		643		62			612		189
	Net income attributable to Hess Corporation	$	1,008	$	420		$	2,325	$	3,127
	Weighted average common shares outstanding:
	Basic		300.7		339			308.6		339.3
	Effect of dilutive securities:
	Restricted common stock		1.5		1.4			1.4		1.3
	Stock options		2		1.8			2		1.6
	Performance share units		0.8		1.1			0.7		1.1
	Diluted		305		343.3			312.7		343.3
	Net income attributable to Hess Corporation per share:
	Basic:
	Continuing operations	$	1.21	$	1.06		$	5.55	$	8.66
	Discontinued operations		2.14		0.18			1.99		0.56
	Net income per share	$	3.35	$	1.24		$	7.54	$	9.22
	Diluted:
	Continuing operations	$	1.2	$	1.05		$	5.48	$	8.56
	Discontinued operations		2.11		0.18			1.96		0.55
	Net income per share	$	3.31	$	1.23		$	7.44	$	9.11

Segment_Information_Tables

Segment Information (Tables)	9 Months Ended
	Sep. 30, 2014
Segment Reporting [Abstract]	'
Corporation's Results by Operating Segment	'
	The Corporation’s results by segment were as follows:
		Three Months Ended						Nine Months Ended
		September 30,						September 30,
		2014			2013			2014			2013
		(In millions)
	Sales and other operating revenues:
	Exploration and Production	$	2,678		$	2,706		$	8,180		$	9,183
	Corporate, Interest and Other		67			14			183			74
	Total	$	2,745		$	2,720		$	8,363		$	9,257
	Net income (loss) attributable to Hess Corporation:
	Exploration and Production	$	441		$	455		$	2,006		$	3,274
	Corporate, Interest and Other		(76	)		(97	)		(293	)		(336	)
	Income from continuing operations		365			358			1,713			2,938
	Discontinued operations		643			62			612			189
	Total	$	1,008		$	420		$	2,325		$	3,127
Schedule of Identifiable Assets by Operating Segment	'
	Identifiable assets by operating segment were as follows:
		September 30,			December 31,
		2014			2013
		(In millions)
	Exploration and Production	$	36,895		$	37,863
	Corporate, Interest and Other		3,708			2,144
	Continuing operations		40,603			40,007
	Discontinued operations		372			2,747
	Total	$	40,975		$	42,754

Financial_Risk_Management_and_1

Financial Risk Management and Trading Activities (Tables)	9 Months Ended
	Sep. 30, 2014
Netting Arrangements on Physical and Financial Derivative Assets and (Liabilities)	'
	The following table provides information about the effect of netting arrangements on the presentation of the Corporation’s physical and financial derivative assets and (liabilities) that are measured at fair value, with the effect of “single counterparty multilateral netting” being included in column (v):
						Gross Amounts Offset
						in the Consolidated
						Balance Sheet
						Physical						Net Amounts			Gross Amounts
						Derivative						Presented in			Not Offset in
						and						the			the
			Gross			Financial			Cash			Consolidated			Consolidated			Net
			Amounts			Instruments			Collateral (a)			Balance Sheet			Balance Sheet			Amounts
			(i)			(ii)			(iii)			(iv)=)+(ii)+(iii)			(v)			(vi)=v)+(v)
			(In millions)
	30-Sep-14
	Assets
	Derivative contracts
	Commodity		$	3,137		$	(2,797	)	$	(31	)	$	309		$	(1	)	$	308
	Interest rate and other			88			(7	)		(2	)		79			(2	)		77
	Counterparty netting			—			(57	)		—			(57	)		—			(57	)
	Total derivative contracts		$	3,225		$	(2,861	)	$	(33	)	$	331		$	(3	)	$	328
	Liabilities
	Derivative contracts
	Commodity		$	(3,207	)	$	2,797		$	98		$	(312	)	$	1		$	(311	)
	Other			(13	)		7			—			(6	)		2			(4	)
	Counterparty netting			—			57			—			57			—			57
	Total derivative contracts		$	(3,220	)	$	2,861		$	98		$	(261	)	$	3		$	(258	)
	December 31, 2013 (b)
	Assets
	Derivative contracts
	Commodity		$	3,086		$	(1,867	)	$	(79	)	$	1,140		$	(41	)	$	1,099
	Interest rate and other			51			(10	)		—			41			(3	)		38
	Counterparty netting			—			(206	)		—			(206	)		—			(206	)
	Total derivative contracts		$	3,137		$	(2,083	)	$	(79	)	$	975		$	(44	)	$	931
	Liabilities
	Derivative contracts
	Commodity		$	(3,212	)	$	1,867		$	168		$	(1,177	)	$	41		$	(1,136	)
	Other			(12	)		10			—			(2	)		3			1
	Counterparty netting			—			206			—			206			—			206
	Total derivative contracts		$	(3,224	)	$	2,083		$	168		$	(973	)	$	44		$	(929	)
	(a)	All cash collateral was offset in the Consolidated Balance Sheet.
	(b)	Assets and liabilities in 2013 include amounts relating to the divested energy marketing business.
Gross and Net Fair Values of Corporate and Trading Derivative Instruments	'
	The table below reflects the gross and net fair values of the risk management and trading derivative instruments and, at December 31, 2013 also includes energy marketing risk management derivative instruments:
			Accounts			Accounts
			Receivable			Payable
			(In millions)
	September 30, 2014
	Derivative contracts designated as hedging instruments
	Commodity		$	69		$	—
	Interest rate and other			29			(4	)
	Total derivative contracts designated as hedging instruments			98			(4	)
	Derivative contracts not designated as hedging instruments (a)
	Commodity			3,068			(3,207	)
	Foreign exchange			49			(1	)
	Equity and other			10			(8	)
	Total derivative contracts not designated as hedging instruments			3,127			(3,216	)
				3,225			(3,220	)
	Gross fair value of derivative contracts
	Master netting arrangements			(2,861	)		2,861
	Cash collateral (received) posted			(33	)		98
	Net fair value of derivative contracts		$	331		$	(261	)
	December 31, 2013 (b)
	Derivative contracts designated as hedging instruments
	Commodity		$	11		$	(3	)
	Interest rate and other			36			(1	)
	Total derivative contracts designated as hedging instruments			47			(4	)
	Derivative contracts not designated as hedging instruments (a)
	Commodity			3,075			(3,209	)
	Foreign exchange			2			(3	)
	Other			13			(8	)
	Total derivative contracts not designated as hedging instruments			3,090			(3,220	)
	Gross fair value of derivative contracts			3,137			(3,224	)
	Master netting arrangements			(2,083	)		2,083
	Cash collateral (received) posted			(79	)		168
	Net fair value of derivative contracts		$	975		$	(973	)
	(a)	Includes trading derivatives and derivatives used for risk management.
	(b)	Assets and liabilities in 2013 include amounts relating to the divested energy marketing business.
Fair Values for Corporation's Net Physical Derivative and Financial Assets and (Liabilities)	'
	The following table provides the Corporation’s net physical derivative and financial assets and (liabilities) that are measured at fair value based on this hierarchy:
												Counterparty
			Level 1			Level 2			Level 3			netting			Collateral			Balance
			(In millions)
	September 30, 2014
	Assets
	Derivative contracts
	Commodity		$	210		$	187		$	120		$	(177	)	$	(31	)	$	309
	Interest rate and other			5			77			—			(1	)		(2	)		79
	Collateral and counterparty netting			(53	)		(4	)		—			—			—			(57	)
	Total derivative contracts			162			260			120			(178	)		(33	)		331
	Other assets measured at fair value on a			33			—			—			—			—			33
	recurring basis
	Total assets measured at fair value		$	195		$	260		$	120		$	(178	)	$	(33	)	$	364	(a)
	on a recurring basis
	Liabilities
	Derivative contracts
	Commodity		$	(226	)	$	(346	)	$	(15	)	$	177		$	98		$	(312	)
	Other			(2	)		—			(5	)		1			—			(6	)
	Collateral and counterparty netting			53			4			—			—			—			57
	Total derivative contracts			(175	)		(342	)		(20	)		178			98			(261	)
	Other liabilities measured at			(31	)		—			—			—			—			(31	)
	fair value on a recurring basis
	Total liabilities measured at		$	(206	)	$	(342	)	$	(20	)	$	178		$	98		$	(292	)(b)
	fair value on a recurring basis
	Other fair value measurement disclosures		$	—		$	(7,307	)	$	—		$	—		$	—		$	(7,307	)
	Long-term debt (c)
												Counterparty
			Level 1			Level 2			Level 3			netting			Collateral			Balance
			(In millions)
	December 31, 2013 (d)
	Assets
	Derivative contracts
	Commodity		$	254		$	579		$	494		$	(108	)	$	(79	)	$	1,140
	Interest rate and other			2			37			3			(1	)		—			41
	Collateral and counterparty netting			(15	)		(191	)		—			—			—			(206	)
	Total derivative contracts			241			425			497			(109	)		(79	)		975
	Other assets measured at fair value on a			—			—			—			—			—			—
	recurring basis
	Total assets measured at fair value		$	241		$	425		$	497		$	(109	)	$	(79	)	$	975
	on a recurring basis
	Liabilities
	Derivative contracts
	Commodity		$	(97	)	$	(1,071	)	$	(285	)	$	108		$	168		$	(1,177	)
	Other			—			(3	)		—			1			—			(2	)
	Collateral and counterparty netting			15			191			—			—			—			206
	Total derivative contracts			(82	)		(883	)		(285	)		109			168			(973	)
	Other liabilities measured at			(31	)		—			—			—			—			(31	)
	fair value on a recurring basis
	Total liabilities measured at		$	(113	)	$	(883	)	$	(285	)	$	109		$	168		$	(1,004	)
	fair value on a recurring basis
	Other fair value measurement disclosures		$	—		$	(6,641	)	$	—		$	—		$	—		$	(6,641	)
	Long-term debt (c)
	(a)	Includes a total of $162 million of Level 1, $260 million of Level 2 and $119 million of Level 3 assets that relate to the Corporation’s continuing operations.
	(b)	Includes a total of $174 million of Level 1, $341 million of Level 2 and $18 million of Level 3 liabilities that relate to the Corporation’s continuing operations.
	(c)	Long-term debt, including current maturities, had a carrying value of $5,996 million and $5,798 million at September 30, 2014 and December 31, 2013, respectively.
	(d)	Assets and liabilities in 2013 include amounts relating to the divested energy marketing business.
Net Transfers into and Out of Each Level of Fair Value Hierarchy	'
	The following table provides net transfers into and out of each level of the fair value hierarchy:
			Three Months Ended						Nine Months Ended
			September 30,						September 30,
			2014			2013			2014			2013
			(In millions)
	Transfers into Level 1		$	40		$	18		$	30		$	(1	)
	Transfers out of Level 1			2			15			1			77
			$	42		$	33		$	31		$	76
			$	(6	)	$	(11	)	$	(22	)	$	(103	)
	Transfers into Level 2
	Transfers out of Level 2			(106	)		(2	)		(102	)		16
			$	(112	)	$	(13	)	$	(124	)	$	(87	)
	Transfers into Level 3		$	67		$	(14	)	$	74		$	(12	)
	Transfers out of Level 3			3			(6	)		19			23
			$	70		$	(20	)	$	93		$	11
Changes in Physical Derivatives and Financial Assets and (Liabilities) Primarily Related to Commodities that are Measured at Fair Value Based on Level 3 Inputs	'
	The following table provides changes in physical derivatives and financial assets and (liabilities) primarily related to commodities that are measured at fair value based on Level 3 inputs:
			Three Months Ended						Nine Months Ended
			September 30,						September 30,
			2014			2013			2014			2013
			(In millions)
	Balance at beginning of period		$	40		$	107		$	212		$	141
	Unrealized pre-tax gains (losses) included in earnings (a)			(10	)		(61	)		(310	)		(122	)
	Purchases (b)			7			4			18			44
	Sales (b)			(7	)		(1	)		(17	)		(32	)
	Settlements (c)			—			(7	)		104			(20	)
	Transfers into Level 3			67			(14	)		74			(12	)
	Transfers out of Level 3			3			(6	)		19			23
	Balance at end of period		$	100		$	22		$	100		$	22
	(a)	The unrealized pre-tax gains and (losses) included in earnings were reflected in Sales and other operating revenues and Income from discontinued operations in the Statement of Consolidated Income.
	(b)	Purchases and sales primarily represent option premiums paid or received, respectively, during the reporting period and were reflected in Sales and other operating revenues and Income from discontinued operations in the Statement of Consolidated Income.
	(c)	Settlements represent realized gains and (losses) on derivatives settled during the reporting period and were reflected in Sales and other operating revenues and Income from discontinued operations in the Statement of Consolidated Income.
Commodity Contracts with a Fair Value	'
	The significant unobservable inputs used in Level 3 fair value measurements for the Corporation’s physical commodity contracts and derivative instruments primarily include less liquid delivered locations for physical commodity contracts or volatility assumptions for out-of-the-money options. The following table provides information about the Corporation's significant recurring unobservable inputs used in the Level 3 fair value measurements. Natural gas contracts are usually quoted and transacted using basis pricing relative to an active pricing location (e.g. Henry Hub), for which price inputs represent the approximate value of differences in geography and local market conditions. All other price inputs in the table below represent full contract prices. Significant changes in any of the inputs, independently or correlated, may result in a different fair value.
			Unit of		Range /
			Measurement		Weighted Average
	30-Sep-14
	Assets
	Commodity contracts with a fair value of $120 million
	Contract prices
	Crude oil and refined petroleum products		$ / bbl (a)		$73.58 - 119.76 / 95.97
	Basis prices
	Natural gas		$ / MMBTU (c)		$(0.65) - 4.01 / 3.57
	Contract volatilities
	Crude oil and refined petroleum products		%		16.00 - 19.00 / 17.00
	Natural gas		%		18.00 - 39.00 / 29.00
	Liabilities
	Commodity contracts with a fair value of $15 million
	Contract prices
	Crude oil and refined petroleum products		$ / bbl (a)		$82.54 - 122.95 / 102.77
	Contract volatilities
	Crude oil and refined petroleum products		%		16.00 - 20.00 / 19.00
	December 31, 2013 (d)
	Assets
	Commodity contracts with a fair value of $494 million
	Contract prices
	Crude oil and refined petroleum products		$ / bbl (a)		$78.45 - 228.86 / 118.68
	Electricity		$ / MWH (b)		$19.52 - 165.75 / 45.76
	Basis prices
	Natural gas		$ / MMBTU (c)		$(4.99) - 18.10 / 0.23
	Contract volatilities
	Crude oil and refined petroleum products		%		16.00 - 18.00 / 17.00
	Natural gas		%		17.00 - 35.00 / 22.00
	Electricity		%		16.00 - 36.00 / 23.00
	Liabilities
	Commodity contracts with a fair value of $285 million
	Contract prices
	Crude oil and refined petroleum products		$ / bbl (a)		$57.45 - 183.89 / 122.54
	Electricity		$ / MWH (b)		$26.48 - 155.33 / 43.12
	Basis prices
	Natural gas		$ / MMBTU (c)		$(1.90) - 18.00 / (0.62)
	Contract volatilities
	Crude oil and refined petroleum products		%		16.00 - 17.00 / 17.00
	Natural gas		%		34.00 - 35.00 / 35.00
	Electricity		%		16.00 - 36.00 / 22.00
	(a)	Price per barrel.
	(b)	Price per megawatt hour.
	(c)	Price per million British thermal unit.
	(d)	Assets and liabilities in 2013 include amounts relating to the divested energy marketing business.
	Note:	Fair value measurement for all recurring inputs was performed using a combination of income and market approach techniques.
Corporate Risk Management [Member]	'
Gross Volumes of Corporation's Derivative Contracts Outstanding	'
	The gross volumes of the risk management derivative contracts outstanding were as follows:
			September 30,			December 31,
			2014			2013
	Commodity, primarily crude oil (millions of barrels)			15			9
	Foreign exchange (millions of USD *)		$	1,197		$	220
	Interest rate swaps (millions of USD)		$	1,300		$	865
	*	Denominated in U.S. dollars (USD).
Net Realized and Unrealized Pre-Tax Gains (Losses) on Derivative Contracts Not Designated as Hedges	'
	Net realized and unrealized pre-tax gains (losses) on derivative contracts used in Financial Risk Management activities and not designated as hedges amounted to the following:
			Three Months Ended						Nine Months Ended
			September 30,						September 30,
			2014			2013			2014			2013
			(In millions)
	Foreign exchange		$	81		$	4		$	68		$	(36	)
	Commodity			4			—			7			—
	Total		$	85		$	4		$	75		$	(36	)
Trading Activities [Member]	'
Gross Volumes of Corporation's Derivative Contracts Outstanding	'
	The gross volumes of derivative contracts outstanding related to trading activities were as follows:
			September 30,			December 31,
			2014			2013
	Commodity
	Crude oil and refined petroleum products (millions of barrels)			1,810			1,815
	Natural gas (millions of mcf)			2,519			2,735
	Electricity (millions of megawatt hours)			1			1
	Foreign exchange (millions of USD)		$	55		$	52
	Interest rate (millions of USD)		$	29		$	—
	Equity securities (millions of shares)			7			11
Net Realized and Unrealized Pre-Tax Gains (Losses) on Derivative Contracts Not Designated as Hedges	'
	Pre-tax unrealized and realized gains (losses) recorded in the Statement of Consolidated Income from trading activities amounted to the following:
			Three Months Ended						Nine Months Ended
			September 30,						September 30,
			2014			2013			2014			2013
			(In millions)
	Commodity		$	52		$	6		$	147		$	53
	Foreign exchange			2			(1	)		1			—
	Equity and other			14			9			34			17
	Total *		$	68		$	14		$	182		$	70
	*	The unrealized pre-tax gains and losses included in earnings were primarily reflected in Sales and other operating revenues.

Basis_of_Presentation_Addition

Basis of Presentation - Additional Information (Detail)	9 Months Ended
	Sep. 30, 2014
	Plant
Organization Consolidation And Presentation Of Financial Statements [Abstract]	'
Number of power plant joint ventures	2
Number of power plant joint ventures sold	2

Discontinued_Operations_Summar

Discontinued Operations - Summary of Sales and Other Operating Revenues and Income from Discontinued Operations (Detail) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]	'	'	'	'
Income from discontinued operations, net of income taxes	$643	$62	$612	$189
Discontinued Operations [Member]	'	'	'	'
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]	'	'	'	'
Sales and other operating revenues	3,029	5,354	9,163	18,359
Income from discontinued operations before income taxes	1,024	96	979	292
Provision for income taxes	381	34	367	103
Income from discontinued operations, net of income taxes	$643	$62	$612	$189

Discontinued_Operations_Additi

Discontinued Operations - Additional Information (Detail) (USD $)	3 Months Ended			9 Months Ended		3 Months Ended	1 Months Ended
	Sep. 30, 2014	Jun. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Jan. 31, 2014
		Lease				Retail Business Disposal [Member]	WilcoHess [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]	'	'	'	'	'	'	'
Consideration from sale of retail business	'	'	'	'	'	$2,800,000,000	'
Gain (loss) on asset sale, pre-tax	'	'	'	'	'	954,000,000	'
Gain (loss) on asset sale, after-tax	'	'	'	'	'	602,000,000	'
Goodwill included in the divested businesses' net book value	'	'	'	126,000,000	'	115,000,000	'
Impairment, environmental, severance and business exit charges, pre-tax	173,000,000	'	191,000,000	254,000,000	390,000,000	'	'
Impairment, environmental, severance and business exit charges, after-tax	110,000,000	'	120,000,000	161,000,000	245,000,000	'	'
Charge related to termination of lease contracts and the purchase of retail gasoline stations, before tax	'	115,000,000	'	'	'	'	'
Charge related to termination of lease contracts and the purchase of retail gasoline stations, after tax	'	72,000,000	'	'	'	'	'
Effect of LIFO inventory liquidation on income, Before tax	183,000,000	'	228,000,000	247,000,000	446,000,000	'	'
Effect of LIFO inventory liquidation on income, After tax	114,000,000	'	143,000,000	154,000,000	280,000,000	'	'
Number of retail gasoline station leases, buyout	'	180	'	'	'	'	'
Percentage of equity interest	'	'	'	'	'	'	56.00%
Business acquisition, cost of acquired entity, purchase price	'	'	'	'	'	'	290,000,000
Adjustments of equity investment to fair value, pre-tax gain	'	'	'	'	'	'	39,000,000
Adjustments of equity investment to fair value, after income taxes	'	'	'	'	'	'	24,000,000
Goodwill acquired during period	'	'	'	$115,000,000	'	'	$115,000,000

Exit_and_Disposal_Costs_Compon

Exit and Disposal Costs - Components of and Changes in Restructuring Accruals (Detail) (USD $)	9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014
Restructuring Cost And Reserve [Line Items]	'
Balance at ending of period	$164
Employee Severance [Member]	'
Restructuring Cost And Reserve [Line Items]	'
Balance at beginning of period	171
Provision	77
Payments	-112
Balance at ending of period	136
Facility and Other Exit Costs [Member]	'
Restructuring Cost And Reserve [Line Items]	'
Balance at beginning of period	118
Provision	44
Payments	-134
Balance at ending of period	28
Continuing Operations [Member] | Exploration and Production [Member]	'
Restructuring Cost And Reserve [Line Items]	'
Balance at ending of period	20
Continuing Operations [Member] | Exploration and Production [Member] | Employee Severance [Member]	'
Restructuring Cost And Reserve [Line Items]	'
Balance at beginning of period	32
Provision	19
Payments	-32
Balance at ending of period	19
Continuing Operations [Member] | Exploration and Production [Member] | Facility and Other Exit Costs [Member]	'
Restructuring Cost And Reserve [Line Items]	'
Balance at beginning of period	53
Provision	-16
Payments	-36
Balance at ending of period	1
Continuing Operations [Member] | Corporate and Other [Member]	'
Restructuring Cost And Reserve [Line Items]	'
Balance at ending of period	47
Continuing Operations [Member] | Corporate and Other [Member] | Employee Severance [Member]	'
Restructuring Cost And Reserve [Line Items]	'
Balance at beginning of period	32
Provision	17
Payments	-20
Balance at ending of period	29
Continuing Operations [Member] | Corporate and Other [Member] | Facility and Other Exit Costs [Member]	'
Restructuring Cost And Reserve [Line Items]	'
Balance at beginning of period	17
Provision	13
Payments	-12
Balance at ending of period	18
Discontinued Operations [Member]	'
Restructuring Cost And Reserve [Line Items]	'
Balance at ending of period	97
Discontinued Operations [Member] | Employee Severance [Member]	'
Restructuring Cost And Reserve [Line Items]	'
Balance at beginning of period	107
Provision	41
Payments	-60
Balance at ending of period	88
Discontinued Operations [Member] | Facility and Other Exit Costs [Member]	'
Restructuring Cost And Reserve [Line Items]	'
Balance at beginning of period	48
Provision	47
Payments	-86
Balance at ending of period	$9

Exit_and_Disposal_Costs_Compon1

Exit and Disposal Costs - Components of Costs and Expense Reversals Associated with Corporation's Restructuring Program (Detail) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Employee Severance [Member]	'	'	'	'
Restructuring Cost And Reserve [Line Items]	'	'	'	'
Employee Severance	$16	$44	$77	$235
Employee Severance [Member] | Exploration Expenses, Including Dry Holes and Lease Impairment [Member]	'	'	'	'
Restructuring Cost And Reserve [Line Items]	'	'	'	'
Employee Severance	1	1	5	16
Employee Severance [Member] | Operating Costs and Expenses [Member]	'	'	'	'
Restructuring Cost And Reserve [Line Items]	'	'	'	'
Employee Severance	1	1	3	45
Employee Severance [Member] | Marketing Expenses [Member]	'	'	'	'
Restructuring Cost And Reserve [Line Items]	'	'	'	'
Employee Severance	1	'	2	5
Employee Severance [Member] | General and Administrative Expenses [Member]	'	'	'	'
Restructuring Cost And Reserve [Line Items]	'	'	'	'
Employee Severance	2	9	26	52
Employee Severance [Member] | Income from discontinued operations	'	'	'	'
Restructuring Cost And Reserve [Line Items]	'	'	'	'
Employee Severance	11	33	41	117
Facility and Other Exit Costs [Member]	'	'	'	'
Restructuring Cost And Reserve [Line Items]	'	'	'	'
Facility and Other Exit Costs	20	13	44	57
Facility and Other Exit Costs [Member] | Marketing Expenses [Member]	'	'	'	'
Restructuring Cost And Reserve [Line Items]	'	'	'	'
Facility and Other Exit Costs	3	'	3	'
Facility and Other Exit Costs [Member] | General and Administrative Expenses [Member]	'	'	'	'
Restructuring Cost And Reserve [Line Items]	'	'	'	'
Facility and Other Exit Costs	2	'	-3	9
Facility and Other Exit Costs [Member] | Income from discontinued operations	'	'	'	'
Restructuring Cost And Reserve [Line Items]	'	'	'	'
Facility and Other Exit Costs	15	13	47	48
Facility and Other Exit Costs [Member] | Depreciation, Depletion and Amortization [Member]	'	'	'	'
Restructuring Cost And Reserve [Line Items]	'	'	'	'
Facility and Other Exit Costs	'	'	($3)	'

Exit_and_Disposal_Costs_Additi

Exit and Disposal Costs - Additional Information (Detail) (USD $)	9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2014
		Employee Severance [Member]	Employee Severance [Member]	Facility and Other Exit Costs [Member]
Restructuring Cost And Reserve [Line Items]	'	'	'	'
Enhanced severance benefit arrangements	$1	'	'	'
Accrued restructuring costs	$164	$136	$171	$28
Percentage of accrued employee severance to be paid in current year	60.00%	'	'	'
Percentage of accrued employee severance to be paid in next year	35.00%	'	'	'
Percentage of accrued facility and other exit costs to be paid in current year	30.00%	'	'	'

Dispositions_Additional_Inform

Dispositions - Additional Information (Detail) (USD $)

9 Months Ended

3 Months Ended

1 Months Ended

6 Months Ended

1 Months Ended

3 Months Ended

3 Months Ended

1 Months Ended

3 Months Ended

1 Months Ended

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Apr. 30, 2014

Mar. 31, 2014

Mar. 31, 2014

Sep. 30, 2014

Sep. 30, 2014

Jan. 31, 2013

Jun. 30, 2013

Mar. 31, 2013

Mar. 31, 2013

Mar. 31, 2013

Retail Business Disposal [Member]

Electric Generating Facility [Member]

Utica Shale [Member]

Thailand [Member]

Pangkah Asset [Member]

Exploration Block Indonesia [Member]

United Kingdom North Sea Cambo Asset [Member]

Bayonne Energy Complex

Beryl Fields And Scottish Area Gas Evacuation System Sage

Samara-Nafta [Member]

Azeri-Chirag-Guneshli (ACG) Fields [Member]

Baku-Tbilisi-Ceyhan (BTC) Pipeline [Member]

Baku Tbilisi Ceyhan Pipeline And Azeri Chirag Guneshli Fields

acre

Dispositions [Abstract]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Consideration from sale of retail business

'

'

$2,800,000,000

'

'

'

'

'

'

'

'

'

'

'

'

Cash proceeds from asset sales

2,978,000,000

3,802,000,000

'

320,000,000

1,075,000,000

805,000,000

650,000,000

'

53,000,000

79,000,000

442,000,000

1,900,000,000

'

'

884,000,000

Gain (loss) on asset sale, pre-tax

'

'

954,000,000

13,000,000

62,000,000

706,000,000

31,000,000

-20,000,000

33,000,000

'

328,000,000

1,119,000,000

'

'

360,000,000

Gain (loss) on asset sale, after-tax

'

'

602,000,000

8,000,000

35,000,000

706,000,000

-10,000,000

11,000,000

33,000,000

'

323,000,000

1,119,000,000

'

'

360,000,000

Goodwill included in the divested businesses' net book value

126,000,000

'

115,000,000

'

11,000,000

76,000,000

56,000,000

'

'

'

'

'

'

'

'

Area of land sold

'

'

'

'

77,000

'

'

'

'

'

'

'

'

'

'

Cash proceeds from sale of subsidiary

'

'

'

'

'

'

'

'

'

'

'

2,100,000,000

'

'

'

Net gain on sale attributable to noncontrolling interest holder's share

'

'

'

'

'

'

'

'

'

'

'

168,000,000

'

'

'

Net gain on sale attributable to parent

'

'

'

'

'

'

'

'

'

'

'

$951,000,000

'

'

'

Corporation's proportionate interest in oil and gas assets (in percentage)

'

'

'

'

'

'

'

'

'

'

'

'

3.00%

2.00%

'

Inventories_Inventories_Detail

Inventories - Inventories (Detail) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Inventory Disclosure [Abstract]	'	'
Crude oil	$326	$291
Refined petroleum products and natural gas	217	618
Less: LIFO adjustment	-44	-339
Total net crude oil, natural gas and refined petroleum product inventories	499	570
Merchandise, materials and supplies	318	384
Total inventories	$817	$954

Inventories_Additional_Informa

Inventories - Additional Information (Detail) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Inventory [Line Items]	'	'
Inventories	$817	$954
E&P Segment [Member]	'	'
Inventory [Line Items]	'	'
Inventories	$629	$599

Property_Plant_and_Equipment_A

Property, Plant and Equipment - Assets Held for Sale - Additional Information (Detail) (USD $)	Sep. 30, 2014	Dec. 31, 2013	Dec. 31, 2013	Dec. 31, 2013
In Millions, unless otherwise specified			Exploration and Production [Member]	Pangkah [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]	'	'	'	'
Carrying amount of properties classified as held for sale	'	'	$1,097	'
Goodwill allocated	1,858	1,869	76	'
Corporation's proportionate interest in oil and gas assets (in percentage)	'	'	'	75.00%
Assets retirement obligations and deferred income taxes reported in Liabilities associated with assets held for sale	'	'	$286	'

Property_Plant_and_Equipment_N

Property, Plant and Equipment - Net Changes in Capitalized Exploratory Well Costs (Detail) (USD $)	9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014
Capitalized Exploratory Well Costs [Abstract]	'
Balance at January 1	$2,045
Additions to capitalized exploratory well costs pending the determination of proved reserves	184
Reclassifications to wells, facilities and equipment based on the determination of proved reserves	-28
Capitalized exploratory well costs charged to expense	-236
Dispositions and other	-57
Balance at September 30, 2014	$1,908

Property_Plant_and_Equipment_C

Property, Plant and Equipment - Capitalized Exploratory Well Costs - Additional Information (Detail) (USD $)	9 Months Ended	3 Months Ended	9 Months Ended	3 Months Ended	9 Months Ended		1 Months Ended	9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Jun. 30, 2014	Sep. 30, 2014	Sep. 30, 2014	Sep. 30, 2014	Sep. 30, 2014	Oct. 31, 2014	Sep. 30, 2014
		Green Canyon 469 Block [Member]	Block WA-390-P, Offshore Western Australia [Member]	Offshore Ghana [Member]	Offshore Ghana [Member]	Projects under planning and development [Member]	Stampede [Member]	Stampede [Member]
				Well	Well
Capitalized Costs of Unproved Properties Excluded from Amortization [Line Items]	'	'	'	'	'	'	'	'
Exploratory dry hole costs which were incurred and subsequently expensed	$61	'	'	'	'	'	'	'
Capitalized exploratory well costs charged to expense	236	169	'	'	'	'	'	'
Capitalized exploratory well costs that have been capitalized for period greater than one year	$1,737	'	'	'	'	'	'	'
Capitalized well costs	'	'	48.00%	'	21.00%	2.00%	'	29.00%
Working interest in the blocks	'	'	'	'	'	'	25.00%	25.00%
Number of consecutive successful exploration wells	'	'	'	'	7	'	'	'
Number of wells appraisal drilling plans	'	'	'	'	7	'	'	'
Number of wells appraisal drilling plans approved	'	'	'	'	4	'	'	'
Number of wells appraisal drilling plans in process	'	'	'	'	3	'	'	'
Number of appraisal wells completed	'	'	'	3	'	'	'	'

Goodwill_Changes_in_Carrying_A

Goodwill - Changes in Carrying Amount of Goodwill (Detail) (USD $)	9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014
Goodwill And Intangible Assets Disclosure [Abstract]	'
Balance at January 1, 2014	$1,869
Acquisitions	115
Dispositions	-126
Balance at September 30, 2014	$1,858

Asset_Retirement_Obligations_C

Asset Retirement Obligations - Changes to Corporation's Asset Retirement Obligations (Details) (USD $)	9 Months Ended	12 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Asset Retirement Obligation Disclosure [Abstract]	'	'
Asset retirement obligations at beginning of period	$2,772	$2,661
Liabilities incurred	63	42
Liabilities settled or disposed of	-345	-576
Accretion expense	99	129
Revisions of estimated liabilities	275	573
Foreign currency translation	-51	-57
Asset retirement obligations at end of period	2,813	2,772
Less: Current obligations	500	523
Long-term obligations at end of period	$2,313	$2,249

Debt_Additional_Information_De

Debt - Additional Information (Detail) (USD $)	9 Months Ended		6 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Jun. 30, 2014	Jun. 30, 2014	Jun. 30, 2014	Sep. 30, 2014	Sep. 30, 2014
			Coupon Rate of 1.3% Notes Mature in June 2017 [Member]	Coupon Rate of 3.5% Notes Mature in July 2024 [Member]	Unsecured Fixed-Rate Notes [Member]	WilcoHess [Member]
Debt Instrument [Line Items]	'	'	'	'	'	'
Unsecured fixed-rate notes issued	'	$600	$300	$300	'	'
Unsecured fixed-rate notes issued, net of discount	'	598	'	'	'	'
Coupon rate	'	'	1.30%	3.50%	'	'
Debt notes maturity period	'	'	30-Jun-17	31-Jul-24	'	'
Repayments of debt	553	'	'	'	250	74
Retirement of various lease obligations	$212	'	'	'	'	'

Other_NonOperating_Income_Addi

Other Non-Operating Income - Additional Information (Detail) (Bayonne Energy Complex, USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2014
Schedule of Equity Method Investments [Line Items]	'
Joint venture ownership interest percentage	50.00%
Level 3 [Member]	'
Schedule of Equity Method Investments [Line Items]	'
Charge to reduce to fair value	$84
Charge to reduce to fair value, after income taxes	$52

Other_NonOperating_Income_PreT

Other Non-Operating Income - Pre-Tax Foreign Currency Gains (Losses) (Detail) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Foreign Currency [Abstract]	'	'	'	'
Pre-tax foreign currency gains (losses)	$19	($7)	($6)	($58)

Retirement_Plans_Components_of

Retirement Plans - Components of Net Periodic Pension Cost (Detail) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Defined Benefit Plan Disclosure [Line Items]	'	'	'	'
Settlement loss	$11	'	$19	'
Pension Plans [Member]	'	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'	'
Service cost	15	18	40	55
Interest cost	26	22	75	66
Expected return on plan assets	-41	-36	-121	-105
Amortization of net loss	8	12	23	46
Settlement loss	11	'	19	'
Pension expense	$19	$16	$36	$62

Retirement_Plans_Components_of1

Retirement Plans - Components of Net Periodic Pension Cost (Parenthetical) (Detail) (USD $)	3 Months Ended	9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2014
Compensation And Retirement Disclosure [Abstract]	'	'
Charges related to plan settlements	$11	$19
Charges related to plan settlements, after income taxes	$7	$12

Retirement_Plans_Additional_In

Retirement Plans - Additional Information (Detail) (USD $)	9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014
Compensation And Retirement Disclosure [Abstract]	'
Budgeted contributions to funded pension plans in 2014	$70
Corporation contributed to its pension plans	$60

Weighted_Average_Common_Shares2

Weighted Average Common Shares and Share Repurchase Plan - Net Income and Weighted Average Number of Common Shares Used in Basic and Diluted Earnings Per Share Computations (Detail) (USD $)	3 Months Ended		9 Months Ended
In Millions, except Per Share data, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Earnings Per Share [Abstract]	'	'	'	'
Income from continuing operations, net of income taxes	$387	$356	$1,769	$3,118
Less: Net income (loss) attributable to noncontrolling interests	22	-2	56	180
Net income from continuing operations attributable to Hess Corporation	365	358	1,713	2,938
INCOME FROM DISCONTINUED OPERATIONS,NET OF INCOME TAXES	643	62	612	189
NET INCOME ATTRIBUTABLE TO HESS CORPORATION	$1,008	$420	$2,325	$3,127
Weighted average common shares outstanding:	'	'	'	'
Basic	300.7	339	308.6	339.3
Effect of dilutive securities:	'	'	'	'
Restricted common stock	1.5	1.4	1.4	1.3
Stock options	2	1.8	2	1.6
Performance share units	0.8	1.1	0.7	1.1
Diluted	305	343.3	312.7	343.3
Basic:	'	'	'	'
Continuing operations	$1.21	$1.06	$5.55	$8.66
Discontinued operations	$2.14	$0.18	$1.99	$0.56
NET INCOME PER SHARE	$3.35	$1.24	$7.54	$9.22
Diluted:	'	'	'	'
Continuing operations	$1.20	$1.05	$5.48	$8.56
Discontinued operations	$2.11	$0.18	$1.96	$0.55
NET INCOME PER SHARE	$3.31	$1.23	$7.44	$9.11

Weighted_Average_Common_Shares3

Weighted Average Common Shares and Share Repurchase Plan - Additional Information (Detail) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	31-May-14	Mar. 31, 2013
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]	'	'	'	'	'	'
Out-of-the-money stock options	124,357	3,680,344	1,214,422	4,661,606	'	'
Repurchase of outstanding common stock	'	'	'	'	$6,500,000,000	$4,000,000,000
Number of shares purchased	'	'	30,100,000	'	'	'
Shares purchased value	'	'	2,669,000,000	500,000,000	'	'
Additional amount of common stock that may be repurchased under this board authorized plan	$2,300,000,000	'	$2,300,000,000	'	'	'
Average cost per share of share repurchased	'	'	$88.67	'	'	'
Restricted Stock	'	'	'	'	'	'
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]	'	'	'	'	'	'
Shares granted	'	'	1,073,179	1,205,569	'	'
Performance Share Units	'	'	'	'	'	'
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]	'	'	'	'	'	'
Shares granted	'	'	298,222	279,093	'	'
Equity Option	'	'	'	'	'	'
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]	'	'	'	'	'	'
Shares granted	'	'	162,911	'	'	'

Guarantees_and_Contingencies_A

Guarantees and Contingencies - Additional Information (Detail) (USD $)	1 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2014
Commitments And Contingencies Disclosure [Abstract]	'
Litigation settlement for MTBE	$35

Segment_Information_Additional

Segment Information - Additional Information (Detail)	9 Months Ended
	Sep. 30, 2014
	Segment
Segment Reporting [Abstract]	'
Number of operating segments for the Corporation	1

Segment_Information_Corporatio

Segment Information - Corporation's Results by Operating Segment (Detail) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Segment Reporting Information [Line Items]	'	'	'	'
Sales and other operating revenues	$2,745	$2,720	$8,363	$9,257
Net income (loss) attributable to Hess Corporation:	'	'	'	'
Net income from continuing operations attributable to Hess Corporation	365	358	1,713	2,938
Net income (loss) attributable to Hess Corporation, Discontinued operations	643	62	612	189
NET INCOME ATTRIBUTABLE TO HESS CORPORATION	1,008	420	2,325	3,127
Continuing Operations [Member]	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Sales and other operating revenues	2,745	2,720	8,363	9,257
Net income (loss) attributable to Hess Corporation:	'	'	'	'
Net income from continuing operations attributable to Hess Corporation	365	358	1,713	2,938
Continuing Operations [Member] | Exploration and Production [Member]	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Sales and other operating revenues	2,678	2,706	8,180	9,183
Net income (loss) attributable to Hess Corporation:	'	'	'	'
Net income from continuing operations attributable to Hess Corporation	441	455	2,006	3,274
Continuing Operations [Member] | Corporate, Interest and Other [Member]	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Sales and other operating revenues	67	14	183	74
Net income (loss) attributable to Hess Corporation:	'	'	'	'
Net income from continuing operations attributable to Hess Corporation	-76	-97	-293	-336
Discontinued Operations [Member]	'	'	'	'
Net income (loss) attributable to Hess Corporation:	'	'	'	'
Net income (loss) attributable to Hess Corporation, Discontinued operations	$643	$62	$612	$189

Segment_Information_Schedule_o

Segment Information - Schedule of Identifiable Assets by Operating Segment (Detail) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Segment Reporting Information [Line Items]	'	'
Identifiable assets	$40,975	$42,754
Continuing Operations [Member]	'	'
Segment Reporting Information [Line Items]	'	'
Identifiable assets	40,603	40,007
Continuing Operations [Member] | Exploration and Production [Member]	'	'
Segment Reporting Information [Line Items]	'	'
Identifiable assets	36,895	37,863
Continuing Operations [Member] | Corporate, Interest and Other [Member]	'	'
Segment Reporting Information [Line Items]	'	'
Identifiable assets	3,708	2,144
Discontinued Operations [Member]	'	'
Segment Reporting Information [Line Items]	'	'
Identifiable assets	$372	$2,747

Financial_Risk_Management_and_2

Financial Risk Management and Trading Activities - Additional Information (Detail)	9 Months Ended
	Sep. 30, 2014
Derivative Instruments And Hedging Activities Disclosure [Abstract]	'
Voting interest in trading partnership	50.00%

Financial_Risk_Management_and_3

Financial Risk Management and Trading Activities - Gross Volumes of Corporation's Derivative Contracts Outstanding (Detail) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Interest Rate Swaps [Member]	'	'
Derivative [Line Items]	'	'
Derivative notional amount	$1,300	$865
Gross Volumes of the Corporate Risk Management Derivative Contracts Outstanding [Member] | Foreign Exchange [Member]	'	'
Derivative [Line Items]	'	'
Derivative notional amount	1,197	220
Gross Volumes of the Corporate Risk Management Derivative Contracts Outstanding [Member] | Interest Rate Swaps [Member]	'	'
Derivative [Line Items]	'	'
Derivative notional amount	1,300	865
Gross Volumes of the Corporate Risk Management Derivative Contracts Outstanding [Member] | Commodity, Primarily Crude Oil (Millions of Barrels) [Member]	'	'
Derivative [Line Items]	'	'
Absolute volume of derivative commodity contracts	15	9
Gross Volumes of Derivative Contracts Outstanding Relating to Trading Activities [Member] | Foreign Exchange [Member]	'	'
Derivative [Line Items]	'	'
Derivative notional amount	55	52
Gross Volumes of Derivative Contracts Outstanding Relating to Trading Activities [Member] | Interest Rate Swaps [Member]	'	'
Derivative [Line Items]	'	'
Derivative notional amount	$29	'
Gross Volumes of Derivative Contracts Outstanding Relating to Trading Activities [Member] | Crude Oil and Refined Petroleum Products [Member]	'	'
Derivative [Line Items]	'	'
Absolute volume of derivative commodity contracts	1,810	1,815
Gross Volumes of Derivative Contracts Outstanding Relating to Trading Activities [Member] | Natural Gas (Millions of mcf) [Member]	'	'
Derivative [Line Items]	'	'
Absolute volume of derivative commodity contracts	2,519	2,735
Gross Volumes of Derivative Contracts Outstanding Relating to Trading Activities [Member] | Electricity (Millions of megawatt hours)[Member]	'	'
Derivative [Line Items]	'	'
Absolute volume of derivative commodity contracts	1	1
Gross Volumes of Derivative Contracts Outstanding Relating to Trading Activities [Member] | Equity Securities (Millions of Shares) [Member]	'	'
Derivative [Line Items]	'	'
Equity securities	7	11

Financial_Risk_Management_and_4

Financial Risk Management and Trading Activities - Corporate Financial Risk Management Activities - Additional Information (Detail) (USD $)

3 Months Ended

12 Months Ended

3 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

3 Months Ended

3 Months Ended

9 Months Ended

In Millions, unless otherwise specified

Jun. 30, 2014

Mar. 31, 2014

Dec. 31, 2013

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Jun. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

BOPD

BOPD

BOPD

BOPD

Interest Rate Swaps [Member]

Interest Rate Swaps [Member]

Sales and Other Operating Revenues [Member]

Sales and Other Operating Revenues [Member]

Sales and Other Operating Revenues [Member]

Sales and Other Operating Revenues [Member]

Interest Rate Swaps and Fixed-rate Debt [Member]

Interest Rate Swaps and Fixed-rate Debt [Member]

Interest Rate Swaps and Fixed-rate Debt [Member]

Interest Rate Swaps and Fixed-rate Debt [Member]

West Texas Intermediate [Member]

Corporate Risk Management [Member]

Corporate Risk Management [Member]

Corporate Risk Management [Member]

Corporate Risk Management [Member]

Corporate Risk Management [Member]

BOPD

Closed & New Brent Crude Hedges [Member]

New Brent Crude Hedges [Member]

New Brent Crude Hedges [Member]

New Brent Crude Hedges [Member]

New Brent Crude Hedges [Member]

Derivative [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Total number of barrels per day hedged based on crude oil fixed-price swap contracts

'

'

25,000

90,000

'

'

'

'

'

'

'

'

'

'

20,000

'

'

'

'

'

Total number of additional barrels per day hedged based on Brent crude oil fixed-price swap contracts

10,000

5,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Average price per barrel

109.17

109.17

'

109.7

'

'

'

'

'

'

'

'

'

'

100.41

'

'

'

'

'

Realized gains from E&P hedging activities due to the increase in sales and other operating revenues

'

'

'

'

'

'

$27

$2

$24

$36

'

'

'

'

'

'

'

'

'

'

Realized gains from E&P hedging activities net of income taxes

'

'

'

'

'

'

17

1

15

23

'

'

'

'

'

'

'

'

'

'

After-tax deferred gains (losses) in Accumulated other comprehensive income (loss)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

36

'

'

'

'

Gain (loss) on ineffectiveness reflected in earnings

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

6

-17

2

1

Derivative notional amount

'

'

'

'

1,300

865

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Change in the carrying value of the hedged fixed-rate debt - increase/(decrease)

'

'

'

'

'

'

'

'

'

'

-10

1

-5

-27

'

'

'

'

'

'

Change in the fair value of interest rate swaps - increase/(decrease)

'

'

'

'

'

'

'

'

'

'

($10)

$1

($5)

($27)

'

'

'

'

'

'

Financial_Risk_Management_and_5

Financial Risk Management and Trading Activities - Net Realized and Unrealized Pre-Tax Gains (Losses) on Derivative Contracts Used in Corporate Risk Management Activities and Not Designated as Hedges (Detail) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Derivative Instruments Gain Loss [Line Items]	'	'	'	'
Net realized and unrealized pre-tax gains (losses) on derivative contracts used in Corporate Risk Management activities and not designated as hedges	$85	$4	$75	($36)
Foreign Exchange [Member]	'	'	'	'
Derivative Instruments Gain Loss [Line Items]	'	'	'	'
Net realized and unrealized pre-tax gains (losses) on derivative contracts used in Corporate Risk Management activities and not designated as hedges	81	4	68	-36
Commodity [Member]	'	'	'	'
Derivative Instruments Gain Loss [Line Items]	'	'	'	'
Net realized and unrealized pre-tax gains (losses) on derivative contracts used in Corporate Risk Management activities and not designated as hedges	$4	'	$7	'

Financial_Risk_Management_and_6

Financial Risk Management and Trading Activities - Trading Activities - Additional Information (Detail)	9 Months Ended
	Sep. 30, 2014
Derivative Instruments And Hedging Activities Disclosure [Abstract]	'
Voting interest in trading partnership	50.00%
Percentage of information disclosed for trading partnership	100.00%

Financial_Risk_Management_and_7

Financial Risk Management and Trading Activities - Pre-Tax Unrealized and Realized Gains (Losses) from Trading Activities (Detail) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Derivative Instruments Gain Loss [Line Items]	'	'	'	'
Pre-tax unrealized and realized gains (losses) from trading activities	$68	$14	$182	$70
Commodity [Member]	'	'	'	'
Derivative Instruments Gain Loss [Line Items]	'	'	'	'
Pre-tax unrealized and realized gains (losses) from trading activities	52	6	147	53
Foreign Exchange [Member]	'	'	'	'
Derivative Instruments Gain Loss [Line Items]	'	'	'	'
Pre-tax unrealized and realized gains (losses) from trading activities	2	-1	1	'
Equity and Other [Member]	'	'	'	'
Derivative Instruments Gain Loss [Line Items]	'	'	'	'
Pre-tax unrealized and realized gains (losses) from trading activities	$14	$9	$34	$17

Financial_Risk_Management_and_8

Financial Risk Management and Trading Activities - Netting Arrangements on Physical and Financial Derivative Assets and (Liabilities) (Detail) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Derivatives Fair Value [Line Items]	'	'
Gross Amounts, Assets	$3,225	$3,137
Physical Derivative and Financial Instruments, Assets	-2,861	-2,083
Cash Collateral, Assets	-33	-79
Net Amounts Presented in the Consolidated Balance Sheet, Assets	331	975
Gross Amounts Not Offset in the Consolidated Balance Sheet, Assets	-3	-44
Net Amounts, Assets	328	931
Gross Amounts, Liabilities	-3,220	-3,224
Physical Derivative and Financial Instruments, Liabilities	2,861	2,083
Cash Collateral, Liabilities	98	168
Net Amounts Presented in the Consolidated Balance Sheet, Liabilities	-261	-973
Gross Amounts Not Offset in the Consolidated Balance Sheet, Liabilities	3	44
Net Amounts, Liabilities	-258	-929
Commodity [Member]	'	'
Derivatives Fair Value [Line Items]	'	'
Gross Amounts, Assets	3,137	3,086
Physical Derivative and Financial Instruments, Assets	-2,797	-1,867
Cash Collateral, Assets	-31	-79
Net Amounts Presented in the Consolidated Balance Sheet, Assets	309	1,140
Gross Amounts Not Offset in the Consolidated Balance Sheet, Assets	-1	-41
Net Amounts, Assets	308	1,099
Gross Amounts, Liabilities	-3,207	-3,212
Physical Derivative and Financial Instruments, Liabilities	2,797	1,867
Cash Collateral, Liabilities	98	168
Net Amounts Presented in the Consolidated Balance Sheet, Liabilities	-312	-1,177
Gross Amounts Not Offset in the Consolidated Balance Sheet, Liabilities	1	41
Net Amounts, Liabilities	-311	-1,136
Interest Rate and Other [Member]	'	'
Derivatives Fair Value [Line Items]	'	'
Gross Amounts, Assets	88	51
Physical Derivative and Financial Instruments, Assets	-7	-10
Cash Collateral, Assets	-2	'
Net Amounts Presented in the Consolidated Balance Sheet, Assets	79	41
Gross Amounts Not Offset in the Consolidated Balance Sheet, Assets	-2	-3
Net Amounts, Assets	77	38
Counterparty netting [Member]	'	'
Derivatives Fair Value [Line Items]	'	'
Physical Derivative and Financial Instruments, Assets	-57	-206
Net Amounts Presented in the Consolidated Balance Sheet, Assets	-57	-206
Net Amounts, Assets	-57	-206
Physical Derivative and Financial Instruments, Liabilities	57	206
Net Amounts Presented in the Consolidated Balance Sheet, Liabilities	57	206
Net Amounts, Liabilities	57	206
Other [Member]	'	'
Derivatives Fair Value [Line Items]	'	'
Gross Amounts, Liabilities	-13	-12
Physical Derivative and Financial Instruments, Liabilities	7	10
Net Amounts Presented in the Consolidated Balance Sheet, Liabilities	-6	-2
Gross Amounts Not Offset in the Consolidated Balance Sheet, Liabilities	2	3
Net Amounts, Liabilities	($4)	$1

Financial_Risk_Management_and_9

Financial Risk Management and Trading Activities - Fair Value Measurements - Additional Information (Detail) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Derivative [Line Items]	'	'
Total net derivative contract assets	$328	$931
Total net derivative contract liabilities	258	929
Discontinued Operations [Member]	'	'
Derivative [Line Items]	'	'
Total net derivative contract assets	1	612
Total net derivative contract liabilities	$4	$620

Recovered_Sheet1

Financial Risk Management and Trading Activities - Gross and Net Fair Values of Corporate and Trading Derivative Instruments (Detail) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Derivatives Fair Value [Line Items]	'	'
Cash collateral (received) posted	$0	$31
Accounts Receivable [Member]	'	'
Derivatives Fair Value [Line Items]	'	'
Derivative contracts designated as hedging instruments	98	47
Derivative contracts not designated as hedging instruments	3,127	3,090
Gross fair value of derivative contracts	3,225	3,137
Master netting arrangements	-2,861	-2,083
Cash collateral (received) posted	-33	-79
Net fair value of derivative contracts	331	975
Accounts Receivable [Member] | Commodity [Member]	'	'
Derivatives Fair Value [Line Items]	'	'
Derivative contracts designated as hedging instruments	69	11
Derivative contracts not designated as hedging instruments	3,068	3,075
Accounts Receivable [Member] | Interest Rate and Other [Member]	'	'
Derivatives Fair Value [Line Items]	'	'
Derivative contracts designated as hedging instruments	29	36
Accounts Receivable [Member] | Foreign Exchange [Member]	'	'
Derivatives Fair Value [Line Items]	'	'
Derivative contracts not designated as hedging instruments	49	2
Accounts Receivable [Member] | Equity and Other [Member]	'	'
Derivatives Fair Value [Line Items]	'	'
Derivative contracts not designated as hedging instruments	10	'
Accounts Receivable [Member] | Other [Member]	'	'
Derivatives Fair Value [Line Items]	'	'
Derivative contracts not designated as hedging instruments	'	13
Accounts Payable [Member]	'	'
Derivatives Fair Value [Line Items]	'	'
Gross fair value of derivative contracts	-3,220	-3,224
Master netting arrangements	2,861	2,083
Cash collateral (received) posted	98	168
Net fair value of derivative contracts	-261	-973
Derivative contracts designated as hedging instruments	-4	-4
Derivative contracts not designated as hedging instruments	-3,216	-3,220
Accounts Payable [Member] | Commodity [Member]	'	'
Derivatives Fair Value [Line Items]	'	'
Derivative contracts designated as hedging instruments	'	-3
Derivative contracts not designated as hedging instruments	-3,207	-3,209
Accounts Payable [Member] | Interest Rate and Other [Member]	'	'
Derivatives Fair Value [Line Items]	'	'
Derivative contracts designated as hedging instruments	-4	-1
Accounts Payable [Member] | Foreign Exchange [Member]	'	'
Derivatives Fair Value [Line Items]	'	'
Derivative contracts not designated as hedging instruments	-1	-3
Accounts Payable [Member] | Equity and Other [Member]	'	'
Derivatives Fair Value [Line Items]	'	'
Derivative contracts not designated as hedging instruments	-8	'
Accounts Payable [Member] | Other [Member]	'	'
Derivatives Fair Value [Line Items]	'	'
Derivative contracts not designated as hedging instruments	'	($8)

Recovered_Sheet2

Financial Risk Management and Trading Activities - Fair Values for Corporation's Net Physical Derivative and Financial Assets and (Liabilities) (Detail) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]	'	'
Collateral and counterparty netting (Assets)	($57)	($206)
Net derivative contracts (Assets)	331	975
Other assets measured at fair value on a recurring basis	33	0
Total assets measured at fair value on a recurring basis	364	975
Collateral and counterparty netting (Liabilities)	57	206
Net Amounts Presented in the Consolidated Balance Sheet, Liabilities	-261	-973
Other liabilities measured at fair value on a recurring basis	-31	-31
Total liabilities measured at fair value on a recurring basis	-292	-1,004
Other fair value measurement disclosures Long-term debt	-7,307	-6,641
Commodity [Member]	'	'
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]	'	'
Total derivative contracts (Assets)	309	1,140
Net derivative contracts (Assets)	309	1,140
Total derivative contracts (Liabilities)	-312	-1,177
Net Amounts Presented in the Consolidated Balance Sheet, Liabilities	-312	-1,177
Interest Rate and Other [Member]	'	'
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]	'	'
Total derivative contracts (Assets)	79	41
Net derivative contracts (Assets)	79	41
Other [Member]	'	'
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]	'	'
Total derivative contracts (Liabilities)	-6	-2
Net Amounts Presented in the Consolidated Balance Sheet, Liabilities	-6	-2
Level 1 [Member]	'	'
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]	'	'
Collateral and counterparty netting (Assets)	-53	-15
Net derivative contracts (Assets)	162	241
Other assets measured at fair value on a recurring basis	33	0
Total assets measured at fair value on a recurring basis	195	241
Collateral and counterparty netting (Liabilities)	53	15
Net Amounts Presented in the Consolidated Balance Sheet, Liabilities	-175	-82
Other liabilities measured at fair value on a recurring basis	-31	-31
Total liabilities measured at fair value on a recurring basis	-206	-113
Level 1 [Member] | Commodity [Member]	'	'
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]	'	'
Total derivative contracts (Assets)	210	254
Total derivative contracts (Liabilities)	-226	-97
Level 1 [Member] | Interest Rate and Other [Member]	'	'
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]	'	'
Total derivative contracts (Assets)	5	2
Level 1 [Member] | Other [Member]	'	'
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]	'	'
Total derivative contracts (Liabilities)	-2	'
Level 2 [Member]	'	'
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]	'	'
Collateral and counterparty netting (Assets)	-4	-191
Net derivative contracts (Assets)	260	425
Other assets measured at fair value on a recurring basis	0	0
Total assets measured at fair value on a recurring basis	260	425
Collateral and counterparty netting (Liabilities)	4	191
Net Amounts Presented in the Consolidated Balance Sheet, Liabilities	-342	-883
Total liabilities measured at fair value on a recurring basis	-342	-883
Other fair value measurement disclosures Long-term debt	-7,307	-6,641
Level 2 [Member] | Commodity [Member]	'	'
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]	'	'
Total derivative contracts (Assets)	187	579
Total derivative contracts (Liabilities)	-346	-1,071
Level 2 [Member] | Interest Rate and Other [Member]	'	'
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]	'	'
Total derivative contracts (Assets)	77	37
Level 2 [Member] | Other [Member]	'	'
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]	'	'
Total derivative contracts (Liabilities)	'	-3
Level 3 [Member]	'	'
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]	'	'
Net derivative contracts (Assets)	120	497
Other assets measured at fair value on a recurring basis	0	0
Total assets measured at fair value on a recurring basis	120	497
Net Amounts Presented in the Consolidated Balance Sheet, Liabilities	-20	-285
Total liabilities measured at fair value on a recurring basis	-20	-285
Level 3 [Member] | Commodity [Member]	'	'
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]	'	'
Total derivative contracts (Assets)	120	494
Total derivative contracts (Liabilities)	-15	-285
Level 3 [Member] | Interest Rate and Other [Member]	'	'
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]	'	'
Total derivative contracts (Assets)	'	3
Level 3 [Member] | Other [Member]	'	'
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]	'	'
Total derivative contracts (Liabilities)	-5	'
Counterparty netting [Member]	'	'
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]	'	'
Net derivative contracts (Assets)	-178	-109
Other assets measured at fair value on a recurring basis	0	0
Total assets measured at fair value on a recurring basis	-178	-109
Net Amounts Presented in the Consolidated Balance Sheet, Liabilities	178	109
Total liabilities measured at fair value on a recurring basis	178	109
Counterparty netting [Member] | Commodity [Member]	'	'
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]	'	'
Total derivative contracts (Assets)	-177	-108
Total derivative contracts (Liabilities)	177	108
Counterparty netting [Member] | Interest Rate and Other [Member]	'	'
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]	'	'
Total derivative contracts (Assets)	-1	-1
Counterparty netting [Member] | Other [Member]	'	'
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]	'	'
Total derivative contracts (Liabilities)	1	1
Collateral [Member]	'	'
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]	'	'
Net derivative contracts (Assets)	-33	-79
Other assets measured at fair value on a recurring basis	0	0
Total assets measured at fair value on a recurring basis	-33	-79
Net Amounts Presented in the Consolidated Balance Sheet, Liabilities	98	168
Total liabilities measured at fair value on a recurring basis	98	168
Collateral [Member] | Commodity [Member]	'	'
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]	'	'
Total derivative contracts (Assets)	-31	-79
Total derivative contracts (Liabilities)	98	168
Collateral [Member] | Interest Rate and Other [Member]	'	'
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]	'	'
Total derivative contracts (Assets)	($2)	'

Recovered_Sheet3

Financial Risk Management and Trading Activities - Fair Values for Corporation's Net Physical Derivative and Financial Assets and (Liabilities) (Parenthetical) (Detail) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]	'	'
Total assets measured at fair value on a recurring basis	$364	$975
Total liabilities measured at fair value on a recurring basis	292	1,004
Long-term debt, including current maturities	5,996	5,798
Level 1 [Member]	'	'
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]	'	'
Total assets measured at fair value on a recurring basis	195	241
Total liabilities measured at fair value on a recurring basis	206	113
Level 1 [Member] | Continuing Operations [Member]	'	'
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]	'	'
Total assets measured at fair value on a recurring basis	162	'
Total liabilities measured at fair value on a recurring basis	174	'
Level 2 [Member]	'	'
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]	'	'
Total assets measured at fair value on a recurring basis	260	425
Total liabilities measured at fair value on a recurring basis	342	883
Level 2 [Member] | Continuing Operations [Member]	'	'
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]	'	'
Total assets measured at fair value on a recurring basis	260	'
Total liabilities measured at fair value on a recurring basis	341	'
Level 3 [Member]	'	'
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]	'	'
Total assets measured at fair value on a recurring basis	120	497
Total liabilities measured at fair value on a recurring basis	20	285
Level 3 [Member] | Continuing Operations [Member]	'	'
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]	'	'
Total assets measured at fair value on a recurring basis	119	'
Total liabilities measured at fair value on a recurring basis	$18	'

Recovered_Sheet4

Financial Risk Management and Trading Activities - Net Transfers into and Out of Each Level of Fair Value Hierarchy (Detail) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Level 1 [Member]	'	'	'	'
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]	'	'	'	'
Fair value measurements net transfers in	$40	$18	$30	($1)
Fair value measurements net transfers out	2	15	1	77
Fair Value Measurements Net Transfers Into Or Out Of, Total	42	33	31	76
Level 2 [Member]	'	'	'	'
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]	'	'	'	'
Fair value measurements net transfers in	-6	-11	-22	-103
Fair value measurements net transfers out	-106	-2	-102	16
Fair Value Measurements Net Transfers Into Or Out Of, Total	-112	-13	-124	-87
Level 3 [Member]	'	'	'	'
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]	'	'	'	'
Fair value measurements net transfers in	67	-14	74	-12
Fair value measurements net transfers out	3	-6	19	23
Fair Value Measurements Net Transfers Into Or Out Of, Total	$70	($20)	$93	$11

Recovered_Sheet5

Financial Risk Management and Trading Activities - Changes in Physical Derivatives and Financial Assets and (Liabilities) Primarily Related to Commodities that are Measured at Fair Value Based on Level 3 Inputs (Detail) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Derivative Instruments And Hedging Activities Disclosure [Abstract]	'	'	'	'
Balance at beginning of period	$40	$107	$212	$141
Unrealized pre-tax gains (losses) included in earnings	-10	-61	-310	-122
Purchases	7	4	18	44
Sales	-7	-1	-17	-32
Settlements	'	-7	104	-20
Transfers into Level 3	67	-14	74	-12
Transfers out of Level 3	3	-6	19	23
Balance at end of period	$100	$22	$100	$22

Recovered_Sheet6

Financial Risk Management and Trading Activities - Commodity Contracts with a Fair Value (Detail)	Sep. 30, 2014	Dec. 31, 2013
Minimum [Member] | Contract Prices | Crude Oil and Refined Petroleum Products [Member] | Commodity [Member]	'	'
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]	'	'
Range of measurement of assets for recurring inputs	73.58	78.45
Range of measurement of liabilities for recurring inputs	82.54	57.45
Minimum [Member] | Contract Prices | Electricity (Millions of megawatt hours)[Member] | Commodity [Member]	'	'
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]	'	'
Range of measurement of assets for recurring inputs	'	19.52
Range of measurement of liabilities for recurring inputs	'	26.48
Minimum [Member] | Basis Prices [Member] | Natural Gas [Member]	'	'
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]	'	'
Range of measurement of assets for recurring inputs	-0.65	-4.99
Range of measurement of liabilities for recurring inputs	'	-1.9
Minimum [Member] | Contract volatilities [Member] | Crude Oil and Refined Petroleum Products [Member]	'	'
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]	'	'
Percentage range of measurement of assets for recurring inputs	16.00%	16.00%
Percentage range of measurement of liabilities for recurring inputs	16.00%	16.00%
Minimum [Member] | Contract volatilities [Member] | Natural Gas [Member]	'	'
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]	'	'
Percentage range of measurement of assets for recurring inputs	18.00%	17.00%
Percentage range of measurement of liabilities for recurring inputs	'	34.00%
Minimum [Member] | Contract volatilities [Member] | Electricity (Millions of megawatt hours)[Member]	'	'
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]	'	'
Percentage range of measurement of assets for recurring inputs	'	16.00%
Percentage range of measurement of liabilities for recurring inputs	'	16.00%
Maximum [Member] | Contract Prices | Crude Oil and Refined Petroleum Products [Member] | Commodity [Member]	'	'
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]	'	'
Range of measurement of assets for recurring inputs	119.76	228.86
Range of measurement of liabilities for recurring inputs	122.95	183.89
Maximum [Member] | Contract Prices | Electricity (Millions of megawatt hours)[Member] | Commodity [Member]	'	'
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]	'	'
Range of measurement of assets for recurring inputs	'	165.75
Range of measurement of liabilities for recurring inputs	'	155.33
Maximum [Member] | Basis Prices [Member] | Natural Gas [Member]	'	'
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]	'	'
Range of measurement of assets for recurring inputs	4.01	18.1
Range of measurement of liabilities for recurring inputs	'	18
Maximum [Member] | Contract volatilities [Member] | Crude Oil and Refined Petroleum Products [Member]	'	'
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]	'	'
Percentage range of measurement of assets for recurring inputs	19.00%	18.00%
Percentage range of measurement of liabilities for recurring inputs	20.00%	17.00%
Maximum [Member] | Contract volatilities [Member] | Natural Gas [Member]	'	'
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]	'	'
Percentage range of measurement of assets for recurring inputs	39.00%	35.00%
Percentage range of measurement of liabilities for recurring inputs	'	35.00%
Maximum [Member] | Contract volatilities [Member] | Electricity (Millions of megawatt hours)[Member]	'	'
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]	'	'
Percentage range of measurement of assets for recurring inputs	'	36.00%
Percentage range of measurement of liabilities for recurring inputs	'	36.00%
Weighted Average [Member] | Contract Prices | Crude Oil and Refined Petroleum Products [Member] | Commodity [Member]	'	'
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]	'	'
Range of measurement of assets for recurring inputs	95.97	118.68
Range of measurement of liabilities for recurring inputs	102.77	122.54
Weighted Average [Member] | Contract Prices | Electricity (Millions of megawatt hours)[Member] | Commodity [Member]	'	'
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]	'	'
Range of measurement of assets for recurring inputs	'	45.76
Range of measurement of liabilities for recurring inputs	'	43.12
Weighted Average [Member] | Basis Prices [Member] | Natural Gas [Member]	'	'
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]	'	'
Range of measurement of assets for recurring inputs	3.57	0.23
Range of measurement of liabilities for recurring inputs	'	-0.62
Weighted Average [Member] | Contract volatilities [Member] | Crude Oil and Refined Petroleum Products [Member]	'	'
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]	'	'
Percentage range of measurement of assets for recurring inputs	17.00%	17.00%
Percentage range of measurement of liabilities for recurring inputs	19.00%	17.00%
Weighted Average [Member] | Contract volatilities [Member] | Natural Gas [Member]	'	'
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]	'	'
Percentage range of measurement of assets for recurring inputs	29.00%	22.00%
Percentage range of measurement of liabilities for recurring inputs	'	35.00%
Weighted Average [Member] | Contract volatilities [Member] | Electricity (Millions of megawatt hours)[Member]	'	'
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]	'	'
Percentage range of measurement of assets for recurring inputs	'	23.00%
Percentage range of measurement of liabilities for recurring inputs	'	22.00%

Recovered_Sheet7

Financial Risk Management and Trading Activities - Commodity Contracts with a Fair Value (Parenthetical) (Detail) (Commodity [Member], USD $)	Sep. 30, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]	'	'
Total derivative contracts (Assets)	$309	$1,140
Total derivatives contract (liabilities)	312	1,177
Level 3 [Member]	'	'
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]	'	'
Total derivative contracts (Assets)	120	494
Total derivatives contract (liabilities)	$15	$285

Recovered_Sheet8

Financial Risk Management and Trading Activities - Credit Risk - Additional Information (Detail) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]	'	'
Cash held from counterparties	$33	$79
Cash posted to counterparties	98	168
Outstanding letters of credit	169	410
Net liability related to both realized and unrealized derivative contracts with contingent collateral provisions	52	281
Cash collateral (received) posted	0	31
Additional collateral	$52	$134
Integrated Oil Companies [Member] | Continuing Operations [Member]	'	'
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]	'	'
Accounts receivable - Trade	32.00%	45.00%
Refiners [Member] | Continuing Operations [Member]	'	'
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]	'	'
Accounts receivable - Trade	12.00%	18.00%
Financial Institutions [Member] | Continuing Operations [Member]	'	'
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]	'	'
Accounts receivable - Trade	22.00%	14.00%
Government Entities [Member] | Continuing Operations [Member]	'	'
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]	'	'
Accounts receivable - Trade	9.00%	8.00%
Trading Companies [Member] | Continuing Operations [Member]	'	'
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]	'	'
Accounts receivable - Trade	15.00%	7.00%

Subsequent_Events_Additional_I

Subsequent Events - Additional Information (Detail) (Stampede [Member])	1 Months Ended	9 Months Ended
	Oct. 31, 2014	Sep. 30, 2014
Stampede [Member]	'	'
Subsequent Event [Line Items]	'	'
Working interest in the blocks	25.00%	25.00%