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Document and Entity Information - USD ($)	9 Months Ended
Document and Entity Information - USD ($)	Sep. 30, 2011	Jun. 30, 2010
Document and Entity Information [Abstract]
Entity Registrant Name	HESS CORP
Entity Central Index Key	0000004447
Document Type	10-Q
Document Period End Date	Sep. 30, 2011
Amendment Flag	false
Document Fiscal Year Focus	2011
Document Fiscal Period Focus	Q3
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Entity Public Float		$ 14,497,000,000
Entity Common Stock, Shares Outstanding (actual number)	339,899,800

Statement of Consolidated Income (Unaudited) - USD ($) shares in Thousands, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
REVENUES AND NON-OPERATING INCOME
Sales (excluding excise taxes) and other operating revenues	$ 8,665	$ 7,864	$ 28,733	$ 24,855
Income (loss) from equity investment in HOVENSA L.L.C.	(36)	(83)	(133)	(174)
Other, net	97	1,172	447	1,242
Total revenues and non-operating income	8,726	8,953	29,047	25,923
COSTS AND EXPENSES
Cost of products sold (excluding items shown separately below)	6,181	5,330	20,062	17,186
Production expenses	609	475	1,739	1,392
Marketing expenses	266	232	796	730
Exploration expenses, including dry holes and lease impairment	199	225	769	548
Other operating expenses	43	39	127	171
General and administrative expenses	177	151	515	465
Interest expense	94	94	290	261
Depreciation, depletion and amortization	586	584	1,732	1,684
Asset impairments	358	532	358	532
Total costs and expenses	8,513	7,662	26,388	22,969
INCOME BEFORE INCOME TAXES	213	1,291	2,659	2,954
Provision (benefit) for income taxes	(54)	200	849	899
NET INCOME	267	1,091	1,810	2,055
Less: Net income (loss) attributable to noncontrolling interests	(31)	(63)	(24)	(12)
NET INCOME ATTRIBUTABLE TO HESS CORPORATION	$ 298	$ 1,154	$ 1,834	$ 2,067
NET INCOME PER SHARE ATTRIBUTABLE TO HESS CORPORATION
BASIC	$ 0.89	$ 3.54	$ 5.45	$ 6.36
DILUTED	$ 0.88	$ 3.52	$ 5.40	$ 6.31
WEIGHTED AVERAGE NUMBER OF COMMON SHARES OUTSTANDING (DILUTED)	340,222	327,634	339,838	327,342
COMMON STOCK DIVIDENDS PER SHARE	$ 0.10	$ 0.10	$ 0.30	$ 0.30

Consolidated Balance Sheet (Unaudited) - USD ($) $ in Millions	Sep. 30, 2011	Dec. 31, 2010
CURRENT ASSETS
Cash and cash equivalents	$ 827	$ 1,608
Accounts receivable
Trade	3,828	4,478
Other	335	240
Inventories	1,516	1,452
Other current assets	973	1,002
Total current assets	7,479	8,780
INVESTMENTS IN AFFILIATES	391	443
PROPERTY, PLANT AND EQUIPMENT
Total - at cost	40,432	35,703
Less reserves for depreciation, depletion, amortization and lease impairment	16,265	14,576
Property, plant and equipment - net	24,167	21,127
GOODWILL	2,383	2,408
DEFERRED INCOME TAXES	2,322	2,167
OTHER ASSETS	597	471
TOTAL ASSETS	37,339	35,396
CURRENT LIABILITIES
Accounts payable	3,486	4,274
Accrued liabilities	2,258	2,567
Taxes payable	818	726
Short-term debt and current maturities of long-term debt	44	46
Total current liabilities	6,606	7,613
LONG-TERM DEBT	5,548	5,537
DEFERRED INCOME TAXES	3,157	2,995
ASSET RETIREMENT OBLIGATIONS	1,881	1,203
OTHER LIABILITIES AND DEFERRED CREDITS	1,233	1,239
Total liabilities	18,425	18,587
Hess Corporation Stockholders' Equity
Common stock, par value $1.00, Authorized - 600,000 shares, Issued - 339,900 shares at September 30, 2011; 337,681 shares at December 31, 2010	340	338
Capital in excess of par value	3,369	3,256
Retained earnings	15,991	14,254
Accumulated other comprehensive income (loss)	(867)	(1,159)
Total Hess Corporation stockholders' equity	18,833	16,689
Noncontrolling interests	81	120
Total equity	18,914	16,809
TOTAL LIABILITIES AND EQUITY	$ 37,339	$ 35,396

Consolidated Balance Sheet (Unaudited) (Parenthetical) - $ / shares shares in Thousands	Sep. 30, 2011	Dec. 31, 2010
Hess Corporation Stockholders' Equity
Common stock, par value	$ 1.00	$ 1.00
Common stock, shares authorized	600,000	600,000
Common stock, shares issued	339,900	337,681

Statement of Consolidated Cash Flows (Unaudited) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 1,810	$ 2,055
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation, depletion and amortization	1,732	1,684
Asset impairments	358	532
Exploratory dry hole costs and lease impairment	434	308
Provision (benefit) for deferred income taxes	(224)	(242)
(Income) loss from equity investment in HOVENSA L.L.C.	133	174
Gains on asset sales	(446)	(1,208)
Stock compensation expense	77	84
Changes in operating assets and liabilities and other	(28)	(335)
Net cash provided by operating activities	3,846	3,052
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(4,891)	(3,151)
Proceeds from asset sales	490	183
Other, net	(74)	(25)
Net cash used in investing activities	(4,475)	(2,993)
Debt with maturities of greater than 90 days
Borrowings	14	1,261
Repayments	(50)	(168)
Cash dividends paid	(136)	(131)
Other, net	20	(30)
Net cash provided by (used in) financing activities	(152)	932
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	(781)	991
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR	1,608	1,362
CASH AND CASH EQUIVALENTS AT END OF PERIOD	$ 827	$ 2,353

Basis of Presentation	9 Months Ended
Basis of Presentation	Sep. 30, 2011
Basis of Presentation [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) consolidated financial position at September 30, 2011 and December 31, 2010 and the consolidated results of operations for the three and nine month periods ended September 30, 2011 and 2010 and the consolidated cash flows for the nine month periods ended September 30, 2011 and 2010. The unaudited results of operations for the interim periods reported are not necessarily indicative of results to be expected for the full year. The financial statements were 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 Form 10-K for the year ended December 31, 2010.

- Definition

The entire disclosure for organization, consolidation and basis of presentation of financial statements disclosure.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 51
-Paragraph 2-6
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Name Statement of Position (SOP)
-Publisher AICPA
-Number 94-6
-Paragraph 10
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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+ Details

Libyan Operations	9 Months Ended
Libyan Operations	Sep. 30, 2011
Libyan Operations [Abstract]
Libyan Operations	2. Libyan Operations In response to civil unrest in Libya, a number of measures were taken by the international community in the first quarter of 2011, including the imposition of economic sanctions. As a consequence of the civil unrest and the sanctions, the Corporation delivered force majeure notices to the Libyan government relating to the agreements covering its exploration and production interests in order to protect its rights while it is temporarily prevented from fulfilling its obligations and benefiting from the rights granted by those agreements. During the third quarter, the United States Department of the Treasury’s Office of Foreign Assets Control issued general licenses which permit the Corporation to engage with the Libyan National Oil Company, with certain exceptions. Due to continuing security concerns, these force majeure declarations remain in place and the Corporation is currently unable to determine when or if it will resume operations in Libya. The Corporation’s Libyan production averaged 23,000 barrels of oil equivalent per day (boepd) for the full year of 2010 and 14,000 boepd for the first quarter of 2011. Production was suspended in the first quarter of 2011. The Corporation had proved reserves of 167 million barrels of oil equivalent in Libya at December 31, 2010. At September 30, 2011, the net book value of the Corporation’s exploration and production assets in Libya was approximately $400 million.

Acquisitions and Divestitures	9 Months Ended
Acquisitions and Divestitures	Sep. 30, 2011
Acquisitions and Divestitures [Abstract]
Acquisitions and Divestitures	3. Acquisitions and Divestitures The Corporation entered into agreements to acquire approximately 85,000 net acres in the Utica Shale play in eastern Ohio for $750 million, principally through the acquisition of Marquette Exploration LLC (Marquette), which closed in August 2011. This acquisition strengthens the Corporation’s portfolio of unconventional assets. The acquisition of Marquette has been accounted for as a business combination and the assets acquired and the liabilities assumed were recorded at fair value. The estimated fair value was based on a valuation approach using market related data which is a Level 3 measurement. The majority of the purchase price was assigned to unproved properties and the remainder to producing wells and working capital. This transaction is subject to normal post closing adjustments. See also Note 17, Subsequent Events. In August 2011, the Corporation completed the sale of its interests in the Snorre Field (Hess 1%), offshore Norway and the Cook Field (Hess 28%) in the United Kingdom North Sea for cash proceeds of $131 million, after closing adjustments. These disposals resulted in non-taxable gains totalling $103 million, which have been included in Other, net in the Statement of Consolidated Income. These assets were producing at a combined net rate of approximately 2,500 boepd at the time of sale. The total combined net book value of the disposed assets prior to the sale was $28 million, including allocated goodwill of $11 million. In February 2011, the Corporation completed the sale of its interests in the Easington Catchment Area (Hess 30%), the Bacton Area (Hess 23%), the Everest Field (Hess 19%) and the Lomond Field (Hess 17%) in the United Kingdom North Sea for cash proceeds of $359 million, after closing adjustments. These disposals resulted in pre-tax gains totalling $343 million ($310 million after income taxes), which have been included in Other, net in the Statement of Consolidated Income. These assets had a productive capacity of approximately 15,000 boepd. The total combined net book value of the disposed assets prior to the sale was $16 million, including allocated goodwill of $14 million. In September 2010, the Corporation completed the exchange of its interests in Gabon and the Clair Field in the United Kingdom for additional interests of 28% and 25%, respectively, in the Valhall and Hod fields in Norway. This exchange was recorded at fair value and resulted in a pre-tax gain of $1,150 million ($1,072 million after income taxes) which has been included in Other, net in the Statement of Consolidated Income. In September 2010, the Corporation also separately acquired additional interests of 8% and 13% in the Valhall and Hod fields, respectively, for $507 million in cash.

Inventories

9 Months Ended

Sep. 30, 2011

Inventory [Abstract]

Inventories

4. Inventories

Inventories consist of the following:


	September 30,			December 31,
	2011			2010
	(Millions of dollars)
Crude oil and other charge stocks	$	589		$	496
Refined petroleum products and natural gas		1,747			1,528
Less: LIFO adjustment		(1,318	)		(995	)

		1,018			1,029
Merchandise, materials and supplies		498			423

Total inventories	$	1,516		$	1,452

Refining Joint Venture

9 Months Ended

Sep. 30, 2011

Refining Joint Venture [Abstract]

Refining Joint Venture

5. Refining Joint Venture

The Corporation accounts for its investment in HOVENSA L.L.C. (HOVENSA), which is included in Investments in affiliates in the Consolidated Balance Sheet, using the equity method. Summarized financial information for HOVENSA follows:


	September 30,			December 31,
	2011			2010
	(Millions of dollars)
Summarized balance sheet
Cash and cash equivalents	$	3		$	45
Other current assets		535			668
Net fixed assets		1,926			1,987
Other assets		23			27
Current liabilities		(1,230	)		(1,001	)
Long-term debt		(523	)		(706	)
Deferred liabilities and credits		(126	)		(135	)

Members’ equity	$	608		$	885

Carrying value of Hess Corporation’s equity investment (*)	$	26		$	158


()*		In addition, the Corporation has prepaid $119 million to HOVENSA for inventory purchases at September 30, 2011.


	Three Months						Nine Months
	Ended September 30,						Ended September 30,
	2011			2010			2011			2010
				(Millions of dollars)
Summarized income statement
Total revenues	$	3,617		$	3,276		$	10,198		$	9,188
Cost and expenses		(3,693	)		(3,439	)		(10,477	)		(9,531	)

Net income (loss)	$	(76	)	$	(163	)	$	(279	)	$	(343	)

Hess Corporation’s income (loss) from equity investment in HOVENSA L.L.C. (*)	$	(36	)	$	(83	)	$	(133	)	$	(174	)


()*		Reflects the amortization of basis differences between the carrying value of the Corporation’s investment and its equity in the net assets of HOVENSA.

- Definition

The entire disclosure for equity investment, or group of investments, for which combined disclosure is appropriate, including: (a) the name of each investee and percentage of ownership of common stock, (b) accounting policies for investments in common stock, (c) difference between the amount at which the investment is carried and the amount of underlying equity in net assets and the accounting treatment of the difference, (d) the total fair value of each identified investment for which a market value is available, (e) summarized information as to assets, liabilities, and results of operations of the investees (for investments in unconsolidated subsidiaries, common stock of joint ventures, or other investments using the equity method), and (f) material effects of possible conversions, exercises, or contingent issuances of the investee. Other disclosures include (a) the names of any investee in which the investor owns 20 percent or more of the voting stock and investment is not accounted for using the equity method, and the reasons why not, and (b) the names of any investee in which the investor owns less than 20 percent of the voting stock and the investment is accounted for using the equity method, and the reasons why it is.

+ References + Details

Capitalized Exploratory Well Costs

9 Months Ended

Sep. 30, 2011

Capitalized Exploratory Well Costs [Abstract]

Capitalized Exploratory Well Costs

6. 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, 2011 (in millions):


Balance at January 1	$	1,783
Additions to capitalized exploratory well costs pending the determination of proved reserves		534
Reclassification to wells, facilities, and equipment based on the determination of proved reserves		(168	)
Capitalized exploratory well costs charged to expense		(70	)
Dispositions		(12	)

Balance at end of period	$	2,067

Capitalized exploratory well costs charged to expense in the preceding table excludes $132 million of exploratory well costs which were incurred and subsequently expensed in 2011. Capitalized exploratory well costs greater than one year old after completion of drilling were $1,320 million at September 30, 2011. Approximately 38% of the capitalized well costs in excess of one year relates to the Pony project in the deepwater Gulf of Mexico, where development planning is progressing with sanction targeted for 2012. Approximately 30% relates to Block WA-390-P, offshore Western Australia, where further drilling and other appraisal and commercial activities are ongoing. Approximately 20% relates to Area 54, offshore Libya, where force majeure has been declared following the civil unrest in Libya. The remainder 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.

Asset Impairments	9 Months Ended
Asset Impairments	Sep. 30, 2011
Asset Impairments [Abstract]
Asset Impairments	7. Asset Impairments In the third quarter of 2011, the Corporation recorded impairment charges of $358 million ($140 million after income taxes) related to increases in the Corporation’s estimated abandonment liabilities primarily for non-producing properties which resulted in the book value of the properties exceeding their fair value. See Note 8, Asset Retirement Obligations. The Corporation’s estimated fair values for these properties were determined using a valuation approach based on market related data (Level 3 fair value measurement). In September 2010, the Corporation recorded a charge of $532 million ($334 million after income taxes) to fully impair the carrying value of its 55% interest in the West Mediterranean Block 1 concession, located offshore Egypt.

Asset Retirement Obligations

9 Months Ended

Sep. 30, 2011

Asset Retirement Obligations [Abstract]

Asset Retirement Obligations

8. Asset Retirement Obligations

The following table describes changes to the Corporation’s asset retirement obligations:


	September 30,			December 31,
	2011			2010
	(Millions of dollars)
Asset retirement obligations at beginning of period	$	1,358		$	1,297
Liabilities incurred		25			255
Liabilities settled or disposed of		(75	)		(282	)
Accretion expense		70			78
Revisions of estimates		757			(6	)
Foreign currency translation		(10	)		16

Asset retirement obligations at end of period		2,125			1,358
Less: current obligations		244			155

Long-term obligations at end of period	$	1,881		$	1,203

The revisions in 2011 reflect changes in estimated abandonment obligations resulting from certain changes to expected decommissioning procedures and increases to services and equipment costs.

Long Term Debt	9 Months Ended
Long Term Debt	Sep. 30, 2011
Long-Term Debt [Abstract]
Long-term Debt	9. Long-term Debt In April 2011, the Corporation entered into a new $4 billion syndicated revolving credit facility that matures in April 2016. The new facility, which replaced a $3 billion facility that was scheduled to mature in May 2012, can be used for borrowings and letters of credit. Borrowings on the facility bear interest at 1.25% above the London Interbank Offered Rate. A facility fee of 0.25% per annum is also payable on the amount of the facility. The interest rate and facility fee are subject to adjustment if the Corporation’s credit rating changes. The restrictions on the amount of total borrowings and secured debt are consistent with the previous facility.

- Definition

The entire disclosure for information about short-term and long-term debt arrangements, which includes amounts of borrowings under each line of credit, note payable, commercial paper issue, bonds indenture, debenture issue, own-share lending arrangements and any other contractual agreement to repay funds, and about the underlying arrangements, rationale for a classification as long-term, including repayment terms, interest rates, collateral provided, restrictions on use of assets and activities, whether or not in compliance with debt covenants, and other matters important to users of the financial statements, such as the effects of refinancing and noncompliance with debt covenants.

+ References + Details

Foreign Currency

9 Months Ended

Sep. 30, 2011

Foreign Currency [Abstract]

Foreign Currency

10. Foreign Currency

Pre-tax foreign currency gains (losses) amounted to the following:


	Three Months					Nine Months
	Ended September 30,					Ended September 30,
	2011			2010		2011			2010
				(Millions of dollars)
Pre-tax foreign currency gains (losses)	$	(9	)	$	5	$	(18	)	$	(10	)

Retirement Plans

9 Months Ended

Sep. 30, 2011

Compensation and Retirement Disclosure [Abstract]

Retirement Plans

11. Retirement Plans

Components of net periodic pension cost consisted of the following:


	Three Months						Nine Months
	Ended September 30,						Ended September 30,
	2011			2010			2011			2010
				(Millions of dollars)
Service cost	$	15		$	12		$	43		$	36
Interest cost		23			22			67			66
Expected return on plan assets		(28	)		(21	)		(82	)		(63	)
Amortization of net loss		13			12			35			36

Pension expense	$	23		$	25		$	63		$	75

In 2011, the Corporation expects to contribute approximately $190 million to its pension plans. Through September 30, 2011, the Corporation contributed $148 million of this amount.

- Definition

The entire disclosure for pension and other postretirement benefits.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph a
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph h
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Emerging Issues Task Force (EITF)
-Number 03-2
-Paragraph 8
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Principles Board Opinion (APB)
-Number 30
-Paragraph 26
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Staff Position (FSP)
-Number FAS106-2
-Paragraph 20, 21, 22
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 11: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 158
-Paragraph 7, 21, 22
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 12: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5, 6, 7, 8
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 13: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Implementation Guide (Q and A)
-Number FAS88
-Paragraph 63
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 14: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-URI http://asc.fasb.org/topic&trid=2235017

+ Details

Income Taxes

9 Months Ended

Sep. 30, 2011

Income Taxes [Abstract]

Income Taxes

12. Income Taxes

The provision (benefit) for income taxes consisted of the following:


	Three Months						Nine Months
	Ended September 30,						Ended September 30,
	2011			2010			2011			2010
				(Millions of dollars)
Current	$	169		$	380		$	1,073		$	1,141
Deferred		(252	)		(180	)		(253	)		(242	)
Adjustment to deferred tax liability for foreign income tax rate change (*)		29			—			29			—

Total provision (benefit) for incomes taxes	$	(54	)	$	200		$	849		$	899


()*		Reflects the July 2011 increase in the supplementary tax on petroleum operations to 32% from 20% in the United Kingdom.

- Definition

The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 08
-Paragraph h
-Article 4

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 109
-Paragraph 136, 172
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 109
-Paragraph 43, 44, 45, 46, 47, 48, 49
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 15
-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32718-109319

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 9
-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32639-109319

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(h))
-URI http://asc.fasb.org/extlink&oid=6881521&loc=d3e23780-122690

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32537-109319

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32559-109319

+ Details

Risk Management and Trading Activities

9 Months Ended

Sep. 30, 2011

Risk Management and Trading Activities [Abstract]

Risk Management and Trading Activities

13. 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, natural gas, refined petroleum products and electricity, as well as to changes in interest rates and foreign currency values. In the disclosures that follow risk management activities are referred to as energy marketing and corporate risk management activities. The Corporation also has trading operations, principally through a 50% voting interest in a consolidated partnership, that trades energy-related commodities, securities and derivatives. These activities are also exposed to commodity price risks primarily related to the prices of crude oil, natural gas, refined petroleum products and electricity.

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 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.

Energy Marketing Activities: In its energy marketing activities the Corporation sells refined petroleum products, natural gas and electricity principally to commercial and industrial businesses at fixed and floating prices for varying periods of time. Commodity contracts such as futures, forwards, swaps and options, together with physical assets such as storage and pipeline capacity, are used to obtain supply and reduce margin volatility or lower costs related to sales contracts with customers.

The table below shows the gross volume of the Corporation’s energy marketing commodity contracts outstanding:


	September 30,		December 31,
	2011		2010
Crude oil and refined petroleum products (millions of barrels)		27		30
Natural gas (millions of mcf)		2,532		2,210
Electricity (millions of megawatt hours)		242		301

The changes in fair value of certain energy marketing commodity contracts that are not designated as hedges are recognized currently in earnings. Revenues from the sales contracts are recognized in Sales and other operating revenues, while supply contract purchases and net settlements from financial derivatives related to these energy marketing activities are recognized in Cost of products sold. Net realized and unrealized pre-tax gains on derivative contracts not designated as hedges amounted to $8 million and $50 million for the three months ended September 30, 2011 and 2010, respectively, and $36 million and $162 million for the nine months ended September 30, 2011 and 2010, respectively.

At September 30, 2011, a portion of energy marketing commodity contracts are designated as cash flow hedges to hedge variability of expected future cash flows of forecasted supply transactions. The length of time over which the Corporation hedges exposure to variability in future cash flows is predominantly two years or less. For contracts outstanding at September 30, 2011, the maximum duration was approximately three years. The Corporation records the effective portion of changes in the fair value of cash flow hedges as a component of other comprehensive income. Amounts recorded in Accumulated other comprehensive income are reclassified into Cost of products sold in the same period that the hedged item is recognized in earnings. The ineffective portion of changes in the fair value of cash flow hedges is recognized immediately in Cost of products sold.

At September 30, 2011, the after-tax deferred losses relating to energy marketing activities recorded in Accumulated other comprehensive income were $71 million ($147 million at December 31, 2010). The Corporation estimates that a loss of approximately $48 million will be reclassified into earnings over the next twelve months. During the three months ended September 30, 2011 and 2010, the Corporation reclassified after-tax losses from Accumulated other comprehensive income of $24 million and $56 million, respectively, and $77 million and $257 million for the nine months ended September 30, 2011 and 2010, respectively. The amounts reflected in earnings due to hedge ineffectiveness were a loss of $2 million and a gain of approximately $1 million for the three months ended September 30, 2011 and 2010, respectively, and a loss of $4 million and a gain of approximately $1 million for the nine months ended September 30, 2011 and 2010, respectively. As a result of changes in the fair value of energy marketing cash flow hedge positions, after-tax deferred losses increased by $4 million and $34 million for the three months ended September 30, 2011 and 2010, respectively, and $1 million and $193 million for the nine months ended September 30, 2011 and 2010, respectively.

Corporate Risk Management Activities: Corporate risk management activities include transactions designed to reduce risk in the selling prices of crude oil, refined petroleum products 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, refined petroleum products 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 including the British Pound and Thai Baht. Interest rate swaps may be used to convert interest payments on certain long-term debt from fixed to floating rates.

The table below shows the gross volume of the Corporate risk management derivative contracts outstanding:


	September 30,		December 31,
	2011		2010
Commodity, primarily crude oil (millions of barrels)		22		35
Foreign exchange (millions of U.S. Dollars)	$	940	$	1,025
Interest rate swaps (millions of U.S. Dollars)	$	895	$	310

During 2008, the Corporation closed Brent crude oil cash flow hedges covering 24,000 barrels per day through 2012, by entering into offsetting contracts with the same counterparty. As a result, the valuation of those contracts is no longer subject to change due to price fluctuations. The deferred hedge loss as of the date that the hedges were closed is being recorded in earnings as the hedged transactions occur. There were no other open hedges of crude oil or natural gas production at September 30, 2011. Hedging activities decreased Exploration and Production Sales and other operating revenues by $131 million and $134 million for the three months ended September 30, 2011 and 2010, respectively ($82 million and $85 million after-tax, respectively), and $387 million and $398 million for the nine months ended September 30, 2011 and 2010, respectively ($244 million and $252 million after-tax, respectively). Hedging activities decreased Exploration and Production Sales and other operating revenues by $533 million for the year ended December 31, 2010 ($338 million after-tax). At September 30, 2011, the after-tax deferred losses in Accumulated other comprehensive income relating to the closed Brent crude oil hedges were $400 million ($638 million at December 31, 2010). The Corporation estimates that a loss of approximately $325 million will be reclassified into earnings over the next twelve months.

At September 30, 2011, the Corporation had interest rate swaps with a gross notional amount of $895 million, which were designated as fair value hedges. Changes in fair value of interest rate swaps and the hedged fixed-rate debt are recorded in Interest expense. During the three months ended September 30, 2011 and 2010, the Corporation recorded an increase of $42 million and $5 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. During the nine months ended September 30, 2011 and 2010, the Corporation recorded an increase of $45 million and $12 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.

Foreign exchange contracts are not designated as hedges. Gains or losses on foreign exchange contracts are recognized immediately in Other, net in Revenues and non-operating income.

Net realized and unrealized pre-tax gains (losses) on derivative contracts used for corporate risk management activities and not designated as hedges amounted to the following:


	Three Months					Nine Months
	Ended September 30,					Ended September 30,
	2011			2010		2011			2010
				(Millions of dollars)
Commodity	$	—		$	—	$	1		$	(7	)
Foreign exchange		(25	)		48		(12	)		(4	)

Total	$	(25	)	$	48	$	(11	)	$	(11	)

Trading Activities: Trading activities are conducted principally through a trading partnership in which the Corporation has a 50% voting interest. This consolidated entity intends to generate earnings through various strategies primarily using energy-related commodities, securities and derivatives. The Corporation also takes trading positions for its own account. The information that follows represents 100% of the trading partnership and the Corporation’s proprietary trading accounts.

The table below shows the gross volume of derivative contracts outstanding relating to trading activities:


	September 30,		December 31,
	2011		2010
Commodity
Crude oil and refined petroleum products (millions of barrels)		2,966		3,328
Natural gas (millions of mcf)		4,910		4,699
Electricity (millions of megawatt hours)		268		79
Foreign exchange (millions of U.S. Dollars)	$	621	$	506
Other
Interest rate (millions of U.S. Dollars)	$	127	$	205
Equity securities (millions of shares)		34		35

Pre-tax gains (losses) recorded in Sales and other operating revenues from trading activities amounted to the following:


	Three Months						Nine Months
	Ended September 30,						Ended September 30,
	2011			2010			2011			2010
				(Millions of dollars)
Commodity	$	(5	)	$	(118	)	$	45		$	26
Foreign exchange		7			2			(1	)		8
Other		(52	)		12			(42	)		(5	)

Total	$	(50	)	$	(104	)	$	2		$	29

Fair Value Measurements: The Corporation determines fair value in accordance with the fair value measurements accounting standard 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). 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, 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 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 financial assets and (liabilities) that are measured at fair value based on this hierarchy:


										Collateral
										and
										counterparty
	Level 1			Level 2			Level 3			netting			Balance
				(Millions of dollars)
September 30, 2011
Assets
Derivative contracts
Commodity	$	283		$	1,288		$	320		$	(305	)	$	1,586
Foreign exchange		—			1			—			—			1
Interest rate and other		2			71			1			(1	)		73
Collateral and counterparty netting		(58	)		(220	)		(20	)		(133	)		(431	)

Total derivative contracts		227			1,140			301			(439	)		1,229
Other assets measured at fair value on a recurring basis		10			90			—			(1	)		99

Total assets	$	237		$	1,230		$	301		$	(440	)	$	1,328


Liabilities
Derivative contracts
Commodity	$	(490	)	$	(1,645	)	$	(557	)	$	305		$	(2,387	)
Foreign exchange		—			(36	)		—			—			(36	)
Other		—			(61	)		(7	)		1			(67	)
Collateral and counterparty netting		58			220			20			85			383

Total derivative contracts		(432	)		(1,522	)		(544	)		391			(2,107	)
Other liabilities measured at fair value on a recurring basis		—			(58	)		(1	)		1			(58	)

Total liabilities	$	(432	)	$	(1,580	)	$	(545	)	$	392		$	(2,165	)


December 31, 2010
Assets
Derivative contracts
Commodity	$	65		$	1,308		$	883		$	(304	)	$	1,952
Foreign exchange		—			1			—			—			1
Interest rate and other		—			17			—			—			17
Collateral and counterparty netting		(1	)		(274	)		(19	)		(213	)		(507	)

Total derivative contracts		64			1,052			864			(517	)		1,463
Other assets measured at fair value on a recurring basis		20			49			3			—			72

Total assets	$	84		$	1,101		$	867		$	(517	)	$	1,535


Liabilities
Derivative contracts
Commodity	$	(324	)	$	(2,519	)	$	(474	)	$	304		$	(3,013	)
Foreign exchange		—			(12	)		—			—			(12	)
Other		—			(10	)		—			—			(10	)
Collateral and counterparty netting		1			274			19			34			328

Total derivative contracts		(323	)		(2,267	)		(455	)		338			(2,707	)
Other liabilities measured at fair value on a recurring basis		—			—			—			—			—

Total liabilities	$	(323	)	$	(2,267	)	$	(455	)	$	338		$	(2,707	)

The following table provides changes in financial assets and liabilities that are measured at fair value based on Level 3 inputs:


	Three Months						Nine Months
	Ended September 30,						Ended September 30,
	2011			2010			2011			2010
				(Millions of dollars)
Balance at beginning of period	$	372		$	41		$	412		$	84
Unrealized gains (losses)
Included in earnings		(85	)		105			19			163
Included in other comprehensive income		13			(18	)		30			62
Purchases		415			347			1,932			782
Sales		(536	)		(397	)		(2,131	)		(745	)
Settlements		(162	)		(1	)		(194	)		(46	)
Transfers into Level 3		(222	)		215			(211	)		57
Transfers out of Level 3		(39	)		12			(101	)		(53	)

Balance at end of period	$	(244	)	$	304		$	(244	)	$	304

Purchases and sales in the table above primarily represent option premiums paid or received, respectively, during the reporting period. Settlements represent realized gains and losses on derivatives settled during the reporting period.

The following table provides net transfers into and out of each level of the fair value hierarchy:


	Three Months						Nine Months
	Ended September 30,						Ended September 30,
	2011			2010			2011			2010
				(Millions of dollars)
Transfers into Level 1	$	(4	)	$	95		$	(12	)	$	123
Transfers out of Level 1		39			89			318			23

	$	35		$	184		$	306		$	146


Transfers into Level 2	$	28		$	(8	)	$	34		$	121
Transfers out of Level 2		198			(403	)		(28	)		(271	)

	$	226		$	(411	)	$	6		$	(150	)


Transfers into Level 3	$	(222	)	$	215		$	(211	)	$	57
Transfers out of Level 3		(39	)		12			(101	)		(53	)

	$	(261	)	$	227		$	(312	)	$	4

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.

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, 2011 and December 31, 2010. Fixed-rate long-term debt had a carrying value of $5,583 million, compared with a fair value of $6,723 million at September 30, 2011, and a carrying value of $5,569 million, compared with a fair value of $6,353 million at December 31, 2010.

The table below reflects the gross and net fair values of the Corporation’s risk management and trading derivative instruments:


	Accounts			Accounts
	Receivable			Payable
	(Millions of dollars)
September 30, 2011
Derivative contracts designated as hedging instruments
Commodity	$	97		$	(281	)
Other		56			(3	)

Total derivative contracts designated as hedging instruments		153			(284	)


Derivative contracts not designated as hedging instruments (*)
Commodity		12,040			(12,657	)
Foreign exchange		6			(41	)
Other		60			(107	)

Total derivative contracts not designated as hedging instruments		12,106			(12,805	)


Gross fair value of derivative contracts		12,259			(13,089	)
Master netting arrangements		(10,897	)		10,897
Cash collateral (received) posted		(133	)		85

Net fair value of derivative contracts	$	1,229		$	(2,107	)


December 31, 2010
Derivative contracts designated as hedging instruments
Commodity	$	225		$	(483	)
Other		10			(2	)

Total derivative contracts designated as hedging instruments		235			(485	)


Derivative contracts not designated as hedging instruments (*)
Commodity		11,581			(12,383	)
Foreign exchange		7			(19	)
Other		31			(32	)

Total derivative contracts not designated as hedging instruments		11,619			(12,434	)


Gross fair value of derivative contracts		11,854			(12,919	)
Master netting arrangements		(10,178	)		10,178
Cash collateral (received) posted		(213	)		34

Net fair value of derivative contracts	$	1,463		$	(2,707	)


(*)		Includes trading derivatives and derivatives used for risk management.

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. The Corporation’s net receivables at September 30, 2011 are concentrated with the following counterparty and customer industry segments: Integrated Oil Companies — 26%, Government Entities — 9%, Manufacturing — 8%, Financial Institutions — 7%, Refiners — 7%, Services — 7%, Trading Companies — 7% and Real Estate — 6%. 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, 2011 and December 31, 2010, the Corporation held cash from counterparties of $133 million and $213 million, respectively. The Corporation posted cash to counterparties at September 30, 2011 and December 31, 2010 of $85 million and $34 million, respectively.

At September 30, 2011, the Corporation had a total of $1,671 million of outstanding letters of credit, primarily issued to satisfy margin requirements. 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, 2011, the net liability related to derivatives with contingent collateral provisions was approximately $1,059 million before cash collateral posted of $11 million. At September 30, 2011, all three major credit rating agencies that rate the Corporation’s debt had assigned an investment grade rating. If two of the three agencies were to downgrade the Corporation’s rating to below investment grade, as of September 30, 2011, the Corporation would be required to post additional collateral of approximately $333 million.

Weighted Average Common Shares

9 Months Ended

Sep. 30, 2011

Weighted Average Common Shares [Abstract]

Weighted Average Common Shares

14. Weighted Average Common Shares

The weighted average number of common shares used in the basic and diluted earnings per share computations are as follows:


	Three Months				Nine Months
	Ended September 30,				Ended September 30,
	2011		2010		2011		2010
			(In thousands)
Common shares — basic		337,380		325,452		336,721		325,166
Effect of dilutive securities
Restricted common stock		1,268		1,369		1,372		1,354
Stock options		1,574		813		1,745		822

Common shares — diluted		340,222		327,634		339,838		327,342

The Corporation issued 2,201,445 stock options and 734,005 shares of restricted stock during the nine months ended September 30, 2011 and 2,768,715 stock options and 944,250 shares of restricted stock for the same period in 2010. The weighted average common shares used in the diluted earnings per share calculations excludes the effect of 4,180,000 and 2,763,000 out-of-the-money stock options for the three and nine months ended September 30, 2011 and 8,932,000 and 5,797,000 out-of-the-money stock options for the same periods in 2010.

Equity and Comprehensive Income

9 Months Ended

Sep. 30, 2011

Equity and Comprehensive Income [Abstract]

Equity and Comprehensive Income

15. Equity and Comprehensive Income

The table below summarizes changes in equity:


	Hess
	Stockholders’			Noncontrolling
	Equity			Interests			Total Equity
	(Millions of dollars)
Balance at January 1, 2011	$	16,689		$	120		$	16,809

Net income (loss)		1,834			(24	)		1,810
Deferred gains (losses) on cash flow hedges, after-tax
Effect of hedge losses recognized in income		321			—			321
Net change in fair value of cash flow hedges		(8	)		—			(8	)
Change in post retirement plan liabilities, after-tax		22			—			22
Change in foreign currency translation adjustment and other		(43	)		3			(40	)

Comprehensive income (loss)		2,126			(21	)		2,105

Activity related to restricted common stock awards, net		39			—			39
Employee stock options, including income tax benefits		105			—			105
Cash dividends declared		(102	)		—			(102	)
Noncontrolling interests, net		(24	)		(18	)		(42	)

Balance at September 30, 2011	$	18,833		$	81		$	18,914


	Hess
	Stockholders’			Noncontrolling
	Equity			Interests			Total Equity
	(Millions of dollars)
Balance at January 1, 2010	$	13,384		$	144		$	13,528

Net income (loss)		2,067			(12	)		2,055
Deferred gains (losses) on cash flow hedges, after-tax
Effect of hedge losses recognized in income		508			—			508
Net change in fair value of cash flow hedges		(226	)		—			(226	)
Change in post retirement plan liabilities, after-tax		24			—			24
Change in foreign currency translation adjustment and other		(8	)		2			(6	)

Comprehensive income (loss)		2,365			(10	)		2,355

Activity related to restricted common stock awards, net		44			—			44
Employee stock options, including income tax benefits		54			—			54
Cash dividends declared		(98	)		—			(98	)
Noncontrolling interests, net		(19	)		(36	)		(55	)

Balance at September 30, 2010	$	15,730		$	98		$	15,828

- Definition

The entire disclosure for shareholders' equity, comprised of portions attributable to the parent entity and noncontrolling interest, if any, including other comprehensive income (as applicable). Including, but not limited to: (1) balances of common stock, preferred stock, additional paid-in capital, other capital and retained earnings; (2) accumulated balance for each classification of other comprehensive income and total amount of comprehensive income; (3) amount and nature of changes in separate accounts, including the number of shares authorized and outstanding, number of shares issued upon exercise and conversion, and for other comprehensive income, the adjustments for reclassifications to net income; (4) rights and privileges of each class of stock authorized; (5) basis of treasury stock, if other than cost, and amounts paid and accounting treatment for treasury stock purchased significantly in excess of market; (6) dividends paid or payable per share and in the aggregate for each class of stock for each period presented; (7) dividend restrictions and accumulated preferred dividends in arrears (in aggregate and per share amount); (8) retained earnings appropriations or restrictions, such as dividend restrictions; (9) impact of change in accounting principle, initial adoption of new accounting principle and correction of an error in previously issued financial statements; (10) shares held in trust for Employee Stock Ownership Plan (ESOP); (11) deferred compensation related to issuance of capital stock; (12) note received for issuance of stock; (13) unamortized discount on shares; (14) description, terms, and number of warrants or rights outstanding; (15) shares under subscription and subscription receivables, effective date of new retained earnings after quasi-reorganization and deficit eliminated by quasi-reorganization and, for a period of at least ten years after the effective date, the point in time from which the new retained dates; and (16) retroactive effective of subsequent change in capital structure.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Principles Board Opinion (APB)
-Number 12
-Paragraph 10
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 04
-Article 3

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 4
-Section 08
-Paragraph d

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 43
-Chapter 1
-Section B
-Paragraph 7, 11A
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 129
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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 6: http://www.xbrl.org/2003/role/presentationRef
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-Name Regulation S-X (SX)
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-Section 08
-Article 4

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 29, 30, 31
-Article 5

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Staff Accounting Bulletin (SAB)
-Number Topic 4
-Section E

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-Publisher SEC
-Name Staff Accounting Bulletin (SAB)
-Number Topic 4
-Section C

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-Name Accounting Standards Codification
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-URI http://asc.fasb.org/extlink&oid=6521494

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+ Details

Segment Information

9 Months Ended

Sep. 30, 2011

Segment Information [Abstract]

Segment Information

16. Segment Information

The Corporation’s results by operating segment were as follows:


	Three Months						Nine Months
	Ended September 30,						Ended September 30,
	2011			2010			2011			2010
				(Millions of dollars)
Operating revenues
Exploration and Production	$	2,217		$	2,368		$	7,760		$	6,761
Marketing and Refining		6,479			5,535			21,071			18,205
Less: Transfers between affiliates		(31	)		(39	)		(98	)		(111	)

Total (*)	$	8,665		$	7,864		$	28,733		$	24,855


Net income (loss) attributable to Hess Corporation
Exploration and Production	$	422		$	1,277		$	2,148		$	2,316
Marketing and Refining		(23	)		(38	)		(23	)		30
Corporate, including interest		(101	)		(85	)		(291	)		(279	)

Total	$	298		$	1,154		$	1,834		$	2,067


(*)		Operating revenues exclude excise and similar taxes of approximately $600 million and $565 million for the three months ended September 30, 2011 and 2010, respectively, and $1,750 million and $1,650 million for the nine months ended September 30, 2011 and 2010, respectively.

Identifiable assets by operating segment were as follows:


	September 30,		December 31,
	2011		2010
	(Millions of dollars)
Exploration and Production	$	31,122	$	28,242
Marketing and Refining		5,663		6,377
Corporate		554		777

Total	$	37,339	$	35,396

- Definition

The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 131
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
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+ Details

Subsequent Event	9 Months Ended
Subsequent Event	Sep. 30, 2011
Subsequent Event [Abstract]
Subsequent Event	17. Subsequent Events In October 2011, the Corporation completed the acquisition of a 50% undivided interest in CONSOL Energy Inc.’s (CONSOL) approximately 200,000 acres, in the Utica Shale in eastern Ohio, for $59 million in cash at closing and funding of 50% of CONSOL’s share of the drilling costs up to $534 million within a 5-year period. Also, in October 2011, the Corporation acquired for $116 million in cash an additional 4% interest in the South Arne Field, offshore Denmark, increasing its interest to 62% from 58%.

Basis of Presentation (Policies)	9 Months Ended
Basis of Presentation (Policies)	Sep. 30, 2011
Basis of Presentation [Abstract]
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) consolidated financial position at September 30, 2011 and December 31, 2010 and the consolidated results of operations for the three and nine month periods ended September 30, 2011 and 2010 and the consolidated cash flows for the nine month periods ended September 30, 2011 and 2010. The unaudited results of operations for the interim periods reported are not necessarily indicative of results to be expected for the full year. The financial statements were 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 Form 10-K for the year ended December 31, 2010.
Fair Value Measurements	*Fair Value Measurements:* The Corporation determines fair value in accordance with the fair value measurements accounting standard 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). 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, 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 financial asset or liability presented below is based on the lowest significant input level within this fair value hierarchy.

- Definition

Disclosure of accounting policy regarding (1) the principles it follows in consolidating or combining the separate financial statements, including the principles followed in determining the inclusion or exclusion of subsidiaries or other entities in the consolidated or combined financial statements and (2) its treatment of interests (for example, common stock, a partnership interest or other means of exerting influence) in other entities, for example consolidation or use of the equity or cost methods of accounting. The accounting policy may also address the accounting treatment for intercompany accounts and transactions, noncontrolling interest, and the income statement treatment in consolidation for issuances of stock by a subsidiary.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 140
-Paragraph 46
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 51
-Paragraph 2-6
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Interpretation (FIN)
-Number 46R
-Paragraph 14, 15
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Principles Board Opinion (APB)
-Number 18
-Paragraph 5, 6, 16-19
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 5: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Principles Board Opinion (APB)
-Number 18
-Paragraph 20
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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 6: http://www.xbrl.org/2003/role/presentationRef
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-Name Emerging Issues Task Force (EITF)
-Number 96-16
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 7: http://www.xbrl.org/2003/role/presentationRef
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-Name Emerging Issues Task Force (EITF)
-Number 97-2
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Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 3A
-Section 02, 03

Reference 9: http://www.xbrl.org/2003/role/presentationRef
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-Number 210
-Section 02
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Reference 10: http://www.xbrl.org/2003/role/presentationRef
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+ Details

Inventories (Tables)

9 Months Ended

Sep. 30, 2011

Inventory [Abstract]

Inventories


	September 30,			December 31,
	2011			2010
	(Millions of dollars)
Crude oil and other charge stocks	$	589		$	496
Refined petroleum products and natural gas		1,747			1,528
Less: LIFO adjustment		(1,318	)		(995	)

		1,018			1,029
Merchandise, materials and supplies		498			423

Total inventories	$	1,516		$	1,452

Refining Joint Venture (Tables)

9 Months Ended

Sep. 30, 2011

Refining Joint Venture [Abstract]

Summarized balance sheet


	September 30,			December 31,
	2011			2010
	(Millions of dollars)
Summarized balance sheet
Cash and cash equivalents	$	3		$	45
Other current assets		535			668
Net fixed assets		1,926			1,987
Other assets		23			27
Current liabilities		(1,230	)		(1,001	)
Long-term debt		(523	)		(706	)
Deferred liabilities and credits		(126	)		(135	)

Members’ equity	$	608		$	885

Carrying value of Hess Corporation’s equity investment (*)	$	26		$	158


()*		In addition, the Corporation has prepaid $119 million to HOVENSA for inventory purchases at September 30, 2011.

Summarized income statement


	Three Months						Nine Months
	Ended September 30,						Ended September 30,
	2011			2010			2011			2010
				(Millions of dollars)
Summarized income statement
Total revenues	$	3,617		$	3,276		$	10,198		$	9,188
Cost and expenses		(3,693	)		(3,439	)		(10,477	)		(9,531	)

Net income (loss)	$	(76	)	$	(163	)	$	(279	)	$	(343	)

Hess Corporation’s income (loss) from equity investment in HOVENSA L.L.C. (*)	$	(36	)	$	(83	)	$	(133	)	$	(174	)


()*		Reflects the amortization of basis differences between the carrying value of the Corporation’s investment and its equity in the net assets of HOVENSA.

Capitalized Exploratory Well Costs (Tables)

9 Months Ended

Sep. 30, 2011

Capitalized Exploratory Well Costs [Abstract]

Net changes in capitalized exploratory well costs


Balance at January 1	$	1,783
Additions to capitalized exploratory well costs pending the determination of proved reserves		534
Reclassification to wells, facilities, and equipment based on the determination of proved reserves		(168	)
Capitalized exploratory well costs charged to expense		(70	)
Dispositions		(12	)

Balance at end of period	$	2,067

- Definition

Tabular disclosure of the aggregate of costs (whether the costs are capitalized or charged to expense at the time they are incurred ) incurred for the year in oil and gas property acquisition, exploration and development activities.

+ References + Details

Asset Retirement Obligations (Tables)

9 Months Ended

Sep. 30, 2011

Asset Retirement Obligations [Abstract]

Change to asset retirement obligations


	September 30,			December 31,
	2011			2010
	(Millions of dollars)
Asset retirement obligations at beginning of period	$	1,358		$	1,297
Liabilities incurred		25			255
Liabilities settled or disposed of		(75	)		(282	)
Accretion expense		70			78
Revisions of estimates		757			(6	)
Foreign currency translation		(10	)		16

Asset retirement obligations at end of period		2,125			1,358
Less: current obligations		244			155

Long-term obligations at end of period	$	1,881		$	1,203

Foreign Currency (Tables)

9 Months Ended

Sep. 30, 2011

Foreign Currency [Abstract]

Pre-tax foreign currency gain (losses)


	Three Months					Nine Months
	Ended September 30,					Ended September 30,
	2011			2010		2011			2010
				(Millions of dollars)
Pre-tax foreign currency gains (losses)	$	(9	)	$	5	$	(18	)	$	(10	)

Retirement Plans (Tables)

9 Months Ended

Sep. 30, 2011

Compensation and Retirement Disclosure [Abstract]

Components of net periodic pension cost


	Three Months						Nine Months
	Ended September 30,						Ended September 30,
	2011			2010			2011			2010
				(Millions of dollars)
Service cost	$	15		$	12		$	43		$	36
Interest cost		23			22			67			66
Expected return on plan assets		(28	)		(21	)		(82	)		(63	)
Amortization of net loss		13			12			35			36

Pension expense	$	23		$	25		$	63		$	75

Income Taxes (Tables)

9 Months Ended

Sep. 30, 2011

Income Taxes [Abstract]

Income Taxes


	Three Months						Nine Months
	Ended September 30,						Ended September 30,
	2011			2010			2011			2010
				(Millions of dollars)
Current	$	169		$	380		$	1,073		$	1,141
Deferred		(252	)		(180	)		(253	)		(242	)
Adjustment to deferred tax liability for foreign income tax rate change (*)		29			—			29			—

Total provision (benefit) for incomes taxes	$	(54	)	$	200		$	849		$	899


()*		Reflects the July 2011 increase in the supplementary tax on petroleum operations to 32% from 20% in the United Kingdom.

Risk Management and Trading Activities (Tables)

9 Months Ended

Sep. 30, 2011

Derivative [Line Items]

Net pre-tax gains on derivative contracts used for corporate risk management not designated as hedges


	Three Months					Nine Months
	Ended September 30,					Ended September 30,
	2011			2010		2011			2010
				(Millions of dollars)
Commodity	$	—		$	—	$	1		$	(7	)
Foreign exchange		(25	)		48		(12	)		(4	)

Total	$	(25	)	$	48	$	(11	)	$	(11	)

Pre-tax gains (losses) from trading activities


	Three Months						Nine Months
	Ended September 30,						Ended September 30,
	2011			2010			2011			2010
				(Millions of dollars)
Commodity	$	(5	)	$	(118	)	$	45		$	26
Foreign exchange		7			2			(1	)		8
Other		(52	)		12			(42	)		(5	)

Total	$	(50	)	$	(104	)	$	2		$	29

Fair Value of the Corporation's financial assets and liabilities based on hierarchy


										Collateral
										and
										counterparty
	Level 1			Level 2			Level 3			netting			Balance
				(Millions of dollars)
September 30, 2011
Assets
Derivative contracts
Commodity	$	283		$	1,288		$	320		$	(305	)	$	1,586
Foreign exchange		—			1			—			—			1
Interest rate and other		2			71			1			(1	)		73
Collateral and counterparty netting		(58	)		(220	)		(20	)		(133	)		(431	)

Total derivative contracts		227			1,140			301			(439	)		1,229
Other assets measured at fair value on a recurring basis		10			90			—			(1	)		99

Total assets	$	237		$	1,230		$	301		$	(440	)	$	1,328


Liabilities
Derivative contracts
Commodity	$	(490	)	$	(1,645	)	$	(557	)	$	305		$	(2,387	)
Foreign exchange		—			(36	)		—			—			(36	)
Other		—			(61	)		(7	)		1			(67	)
Collateral and counterparty netting		58			220			20			85			383

Total derivative contracts		(432	)		(1,522	)		(544	)		391			(2,107	)
Other liabilities measured at fair value on a recurring basis		—			(58	)		(1	)		1			(58	)

Total liabilities	$	(432	)	$	(1,580	)	$	(545	)	$	392		$	(2,165	)


December 31, 2010
Assets
Derivative contracts
Commodity	$	65		$	1,308		$	883		$	(304	)	$	1,952
Foreign exchange		—			1			—			—			1
Interest rate and other		—			17			—			—			17
Collateral and counterparty netting		(1	)		(274	)		(19	)		(213	)		(507	)

Total derivative contracts		64			1,052			864			(517	)		1,463
Other assets measured at fair value on a recurring basis		20			49			3			—			72

Total assets	$	84		$	1,101		$	867		$	(517	)	$	1,535


Liabilities
Derivative contracts
Commodity	$	(324	)	$	(2,519	)	$	(474	)	$	304		$	(3,013	)
Foreign exchange		—			(12	)		—			—			(12	)
Other		—			(10	)		—			—			(10	)
Collateral and counterparty netting		1			274			19			34			328

Total derivative contracts		(323	)		(2,267	)		(455	)		338			(2,707	)
Other liabilities measured at fair value on a recurring basis		—			—			—			—			—

Total liabilities	$	(323	)	$	(2,267	)	$	(455	)	$	338		$	(2,707	)

Changes in financial assets and liabilities at fair value based on level 3 inputs


	Three Months						Nine Months
	Ended September 30,						Ended September 30,
	2011			2010			2011			2010
				(Millions of dollars)
Balance at beginning of period	$	372		$	41		$	412		$	84
Unrealized gains (losses)
Included in earnings		(85	)		105			19			163
Included in other comprehensive income		13			(18	)		30			62
Purchases		415			347			1,932			782
Sales		(536	)		(397	)		(2,131	)		(745	)
Settlements		(162	)		(1	)		(194	)		(46	)
Transfers into Level 3		(222	)		215			(211	)		57
Transfers out of Level 3		(39	)		12			(101	)		(53	)

Balance at end of period	$	(244	)	$	304		$	(244	)	$	304

Net transfers into and out of each level of the fair value hierarchy


	Three Months						Nine Months
	Ended September 30,						Ended September 30,
	2011			2010			2011			2010
				(Millions of dollars)
Transfers into Level 1	$	(4	)	$	95		$	(12	)	$	123
Transfers out of Level 1		39			89			318			23

	$	35		$	184		$	306		$	146


Transfers into Level 2	$	28		$	(8	)	$	34		$	121
Transfers out of Level 2		198			(403	)		(28	)		(271	)

	$	226		$	(411	)	$	6		$	(150	)


Transfers into Level 3	$	(222	)	$	215		$	(211	)	$	57
Transfers out of Level 3		(39	)		12			(101	)		(53	)

	$	(261	)	$	227		$	(312	)	$	4

Gross and net fair values of the Corporation's risk management and trading derivative instruments


	Accounts			Accounts
	Receivable			Payable
	(Millions of dollars)
September 30, 2011
Derivative contracts designated as hedging instruments
Commodity	$	97		$	(281	)
Other		56			(3	)

Total derivative contracts designated as hedging instruments		153			(284	)


Derivative contracts not designated as hedging instruments (*)
Commodity		12,040			(12,657	)
Foreign exchange		6			(41	)
Other		60			(107	)

Total derivative contracts not designated as hedging instruments		12,106			(12,805	)


Gross fair value of derivative contracts		12,259			(13,089	)
Master netting arrangements		(10,897	)		10,897
Cash collateral (received) posted		(133	)		85

Net fair value of derivative contracts	$	1,229		$	(2,107	)


December 31, 2010
Derivative contracts designated as hedging instruments
Commodity	$	225		$	(483	)
Other		10			(2	)

Total derivative contracts designated as hedging instruments		235			(485	)


Derivative contracts not designated as hedging instruments (*)
Commodity		11,581			(12,383	)
Foreign exchange		7			(19	)
Other		31			(32	)

Total derivative contracts not designated as hedging instruments		11,619			(12,434	)


Gross fair value of derivative contracts		11,854			(12,919	)
Master netting arrangements		(10,178	)		10,178
Cash collateral (received) posted		(213	)		34

Net fair value of derivative contracts	$	1,463		$	(2,707	)


(*)		Includes trading derivatives and derivatives used for risk management.

Energy Marketing [Member]

Derivative [Line Items]

Gross volume of the Corporation's derivative instruments outstanding


	September 30,		December 31,
	2011		2010
Crude oil and refined petroleum products (millions of barrels)		27		30
Natural gas (millions of mcf)		2,532		2,210
Electricity (millions of megawatt hours)		242		301

Trading [Member]

Derivative [Line Items]

Gross volume of the Corporation's derivative instruments outstanding


	September 30,		December 31,
	2011		2010
Commodity
Crude oil and refined petroleum products (millions of barrels)		2,966		3,328
Natural gas (millions of mcf)		4,910		4,699
Electricity (millions of megawatt hours)		268		79
Foreign exchange (millions of U.S. Dollars)	$	621	$	506
Other
Interest rate (millions of U.S. Dollars)	$	127	$	205
Equity securities (millions of shares)		34		35

Corporate Risk Management [Member]

Derivative [Line Items]

Gross volume of the Corporation's derivative instruments outstanding


	September 30,		December 31,
	2011		2010
Commodity, primarily crude oil (millions of barrels)		22		35
Foreign exchange (millions of U.S. Dollars)	$	940	$	1,025
Interest rate swaps (millions of U.S. Dollars)	$	895	$	310

Weighted Average Common Shares (Tables)

9 Months Ended

Sep. 30, 2011

Weighted Average Common Shares [Abstract]

Schedule of Weighted Average Number of Shares [Table Text Block]


	Three Months				Nine Months
	Ended September 30,				Ended September 30,
	2011		2010		2011		2010
			(In thousands)
Common shares — basic		337,380		325,452		336,721		325,166
Effect of dilutive securities
Restricted common stock		1,268		1,369		1,372		1,354
Stock options		1,574		813		1,745		822

Common shares — diluted		340,222		327,634		339,838		327,342

Equity and Comprehensive Income (Table)

9 Months Ended

Sep. 30, 2011

Equity and Comprehensive Income [Abstract]

Equity and Comprehensive Income


	Hess
	Stockholders’			Noncontrolling
	Equity			Interests			Total Equity
	(Millions of dollars)
Balance at January 1, 2011	$	16,689		$	120		$	16,809

Net income (loss)		1,834			(24	)		1,810
Deferred gains (losses) on cash flow hedges, after-tax
Effect of hedge losses recognized in income		321			—			321
Net change in fair value of cash flow hedges		(8	)		—			(8	)
Change in post retirement plan liabilities, after-tax		22			—			22
Change in foreign currency translation adjustment and other		(43	)		3			(40	)

Comprehensive income (loss)		2,126			(21	)		2,105

Activity related to restricted common stock awards, net		39			—			39
Employee stock options, including income tax benefits		105			—			105
Cash dividends declared		(102	)		—			(102	)
Noncontrolling interests, net		(24	)		(18	)		(42	)

Balance at September 30, 2011	$	18,833		$	81		$	18,914


	Hess
	Stockholders’			Noncontrolling
	Equity			Interests			Total Equity
	(Millions of dollars)
Balance at January 1, 2010	$	13,384		$	144		$	13,528

Net income (loss)		2,067			(12	)		2,055
Deferred gains (losses) on cash flow hedges, after-tax
Effect of hedge losses recognized in income		508			—			508
Net change in fair value of cash flow hedges		(226	)		—			(226	)
Change in post retirement plan liabilities, after-tax		24			—			24
Change in foreign currency translation adjustment and other		(8	)		2			(6	)

Comprehensive income (loss)		2,365			(10	)		2,355

Activity related to restricted common stock awards, net		44			—			44
Employee stock options, including income tax benefits		54			—			54
Cash dividends declared		(98	)		—			(98	)
Noncontrolling interests, net		(19	)		(36	)		(55	)

Balance at September 30, 2010	$	15,730		$	98		$	15,828

Segment Information (Tables)

9 Months Ended

Sep. 30, 2011

Segment Information [Abstract]

Operating revenues by operating segment

	Three Months						Nine Months
	Ended September 30,						Ended September 30,
	2011			2010			2011			2010
				(Millions of dollars)
Operating revenues
Exploration and Production	$	2,217		$	2,368		$	7,760		$	6,761
Marketing and Refining		6,479			5,535			21,071			18,205
Less: Transfers between affiliates		(31	)		(39	)		(98	)		(111	)

Total (*)	$	8,665		$	7,864		$	28,733		$	24,855


(*)		Operating revenues exclude excise and similar taxes of approximately $600 million and $565 million for the three months ended September 30, 2011 and 2010, respectively, and $1,750 million and $1,650 million for the nine months ended September 30, 2011 and 2010, respectively.

Net income (loss) attributable to Hess Corporation by operating segment

Net income (loss) attributable to Hess Corporation
Exploration and Production	$	422		$	1,277		$	2,148		$	2,316
Marketing and Refining		(23	)		(38	)		(23	)		30
Corporate, including interest		(101	)		(85	)		(291	)		(279	)

Total	$	298		$	1,154		$	1,834		$	2,067

Identifiable assets by operating segment


	September 30,		December 31,
	2011		2010
	(Millions of dollars)
Exploration and Production	$	31,122	$	28,242
Marketing and Refining		5,663		6,377
Corporate		554		777

Total	$	37,339	$	35,396

Libyan Operations (Details) $ in Millions	3 Months Ended	12 Months Ended
Libyan Operations (Details) $ in Millions	Mar. 31, 2011 boepd	Dec. 31, 2010 boepd	Sep. 30, 2011 USD ($)
Libyan Operations (Textual) [Abstract]
The average production in Libya (in boepd)	14,000	23,000
The Corporation's proved reserves in Libya (in B.O.E)		167,000,000
Libyan Operations [Member]
Libyan Operations (Textual) [Abstract]
The net book value of the Corporation's assets in Libya \| $			$ 400

Acquisitions and Divestitures (Details) $ in Millions	1 Months Ended			3 Months Ended
Acquisitions and Divestitures (Details) $ in Millions	Aug. 31, 2011 USD ($) ac boepd	Feb. 28, 2011	Sep. 30, 2010 USD ($)	Mar. 31, 2011 USD ($) boepd
United Kingdom North Sea and Norway [Member]
Additional Acquisitions and Divestitures (Textual) [Abstract]
Cash received from the sale of oil and gas assets	$ 131
Gain/(Loss) on Asset Sales - Tax Free	103
Carrying value of disposed asset	28
Goodwill written off related to sale of business unit	$ 11
Combined net production rate of disposed assets (in boepd) \| boepd	2,500
United Kingdom North Sea [Member]
Additional Acquisitions and Divestitures (Textual) [Abstract]
Cash received from the sale of oil and gas assets				$ 359
Gain on asset sale - before tax				343
Gain on asset sale - after tax				310
Carrying value of disposed asset				16
Goodwill written off related to sale of business unit				$ 14
Productive capacity of disposed assets (in boepd) \| boepd				15,000
Easington Catchment Area [Member]
Additional Acquisitions and Divestitures (Textual) [Abstract]
The Corporation's proportionate interest in oil and gas assets (in percentages)		30.00%
Bacton Area [Member]
Additional Acquisitions and Divestitures (Textual) [Abstract]
The Corporation's proportionate interest in oil and gas assets (in percentages)		23.00%
Everest Field [Member]
Additional Acquisitions and Divestitures (Textual) [Abstract]
The Corporation's proportionate interest in oil and gas assets (in percentages)		19.00%
Lomond Field [Member]
Additional Acquisitions and Divestitures (Textual) [Abstract]
The Corporation's proportionate interest in oil and gas assets (in percentages)		17.00%
Snorre Field [Member]
Additional Acquisitions and Divestitures (Textual) [Abstract]
The Corporation's proportionate interest in oil and gas assets (in percentages)	1.00%
Cook Field [Member]
Additional Acquisitions and Divestitures (Textual) [Abstract]
The Corporation's proportionate interest in oil and gas assets (in percentages)	28.00%
Valhall Field [Member]
Additional Acquisitions and Divestitures (Textual) [Abstract]
Acquisition of additional interests in oil and gas fields			8.00%
Additional interests acquired through asset exchange			28.00%
Hod Field [Member]
Additional Acquisitions and Divestitures (Textual) [Abstract]
Acquisition of additional interests in oil and gas fields			13.00%
Additional interests acquired through asset exchange			25.00%
Valhall and Hod fields [Member]
Additional Acquisitions and Divestitures (Textual) [Abstract]
Business Acquisition, Cost of Acquired Entity, Purchase Price			$ 507
Gain on asset exchange before tax			1,150
Gain on asset exchange after tax			$ 1,072
Utica Shale play [Member]
Additional Acquisitions and Divestitures (Textual) [Abstract]
Net acres acquired in the Utica Shale Play in Ohio (In acres) \| ac	85,000
Business Acquisition, Cost of Acquired Entity, Purchase Price	$ 750

Inventories (Details) - USD ($) $ in Millions	Sep. 30, 2011	Dec. 31, 2010
Inventories
Crude oil and other charge stocks	$ 589	$ 496
Refined petroleum products and natural gas	1,747	1,528
Less: LIFO adjustment	(1,318)	(995)
Total net crude oil, other charge stocks, natural gas and refined product inventories	1,018	1,029
Merchandise, materials and supplies	498	423
Total inventories	$ 1,516	$ 1,452

Refining Joint Venture (Details) - USD ($) $ in Millions	9 Months Ended
Refining Joint Venture (Details) - USD ($) $ in Millions	Sep. 30, 2011	Dec. 31, 2010
Summarized balance sheet
Other current assets	$ (973)	$ (1,002)
Net fixed assets	(24,167)	(21,127)
Other assets	(597)	(471)
Current liabilities	6,606	7,613
Deferred liabilities and credits	1,233	1,239
Carrying value of Hess Corporation's equity investment	26	158
Equity method [Member]
Summarized balance sheet
Cash and cash equivalents	3	45
Other current assets	535	668
Net fixed assets	1,926	1,987
Other assets	23	27
Current liabilities	(1,230)	(1,001)
Long-term debt	(523)	(706)
Deferred liabilities and credits	(126)	(135)
Members' equity	608	$ 885
Refining Joint Venture (Textual) [Abstract]
Inventory purchases prepayment to HOVENSA	$ 119

Refining Joint Venture (Details 1) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
Refining Joint Venture (Details 1) - USD ($) $ in Millions	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Summarized income statement
Total revenues	$ 3,617	$ 3,276	$ 10,198	$ 9,188
Costs and expenses	(3,693)	(3,439)	(10,477)	(9,531)
Net income (loss)	(76)	(163)	(279)	(343)
Hess Corporation's income (loss) from Equity investment in HOVENSA L.L.C.	$ (36)	$ (83)	$ (133)	$ (174)

- Definition

The amount of net income (loss) reported by an equity method investment of the entity.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 159
-Paragraph 18
-Subparagraph f
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Principles Board Opinion (APB)
-Number 18
-Paragraph 20
-Subparagraph d
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph bb
-Article 1

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph w
-Article 1

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 4
-Section 08
-Paragraph g
-Subparagraph 1, 2

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 28
-Subparagraph (f)
-URI http://asc.fasb.org/extlink&oid=6957238&loc=d3e14064-108612

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(g))
-URI http://asc.fasb.org/extlink&oid=6881521&loc=d3e23780-122690

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=6382943&loc=d3e33918-111571

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6382943&loc=d3e33912-111571

+ Details

- Definition

This item represents the entity's proportionate share for the period of the net income (loss) of its investee (such as unconsolidated subsidiaries and joint ventures) to which the equity method of accounting is applied. This item includes income or expense related to stock-based compensation based on the investor's grant of stock to employees of an equity method investee.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 95
-Paragraph 28
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Principles Board Opinion (APB)
-Number 18
-Paragraph 19
-Subparagraph c
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Principles Board Opinion (APB)
-Number 18
-Paragraph 6
-Subparagraph b
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 5
-Section 03
-Paragraph 9

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.12)
-URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6382870&loc=d3e33749-111570

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 04
-Paragraph 11
-Article 7

+ Details

Capitalized Exploratory Well Costs (Details) $ in Millions	9 Months Ended
Capitalized Exploratory Well Costs (Details) $ in Millions	Sep. 30, 2011 USD ($)
Net changes in capitalized exploratory well costs
Balance at January 1	$ 1,783
Additions to capitalized exploratory well costs pending the determination of proved reserves	534
Reclassification to wells, facilities, and equipment based on the determination of proved reserves	(168)
Capitalized exploratory well cost charge to expense	(70)
Dispositions	(12)
Balance at end of period	$ 2,067

Capitalized Exploratory Well Costs (Details Textual) $ in Millions	9 Months Ended
	Sep. 30, 2011 USD ($)
Capitalized Exploratory Well Costs (Textual) [Abstract]
Capitalized exploratory well cost charge to expense	$ 132
Capitalized exploratory well costs that have been capitalized for period greater than one year	$ 1,320
Capitalized well costs attributable to Pony and Tubular Bells projects	38.00%
Capitalized well costs attributable to Block WA-390-P offshore Western Australia	30.00%
Capitalized well costs attributable to Area 54 offshore Libya	20.00%

Asset Impairments (Details Textual) - USD ($) $ in Millions	1 Months Ended	3 Months Ended		9 Months Ended
Asset Impairments (Details Textual) - USD ($) $ in Millions	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Asset Impairments (Textual) [Abstract]
Impairment charge, before income tax		$ 358	$ 532	$ 358	$ 532
Impairment charge, after income tax		$ 140	$ 334
West Med Block 1 [Member]
Significant Acquisitions and Disposals [Line Items]
The Corporation's proportionate interests in oil and gas properties (in percentage)	55.00%

Asset Retirement Obligations (Details) - USD ($) $ in Millions	9 Months Ended	12 Months Ended
	Sep. 30, 2011	Dec. 31, 2010
Change to asset retirement obligation
Asset retirement obligations at January 1	$ 1,358	$ 1,297
Liabilities incurred	25	255
Liabilities settled or disposed of	(75)	(282)
Accretion expense	70	78
Revisions of estimates	757	(6)
Foreign currency translation	(10)	16
Asset retirement obligations at end of period	2,125	1,358
Less: current obligations	244	155
Long-term obligations at end of period	$ 1,881	$ 1,203

Long Term Debt (Details) (Textual) $ in Billions	1 Months Ended
Long Term Debt (Details) (Textual) $ in Billions	Apr. 30, 2011 USD ($)
Long-Term Debt (Textual) [Abstract]
Old syndicated revolving credit facility maturing in May 2012	$ 3
New syndicated revolving credit facility maturing in April 2016	$ 4
Interest rate on the borrowings on the Credit facility	1.25% above the London Internbank Offered Rate
Credit Facility Fee (per annum)	0.25%

Foreign Currency (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
Foreign Currency (Details) - USD ($) $ in Millions	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Pre-tax foreign currency gains (losses)
Pre-tax foreign currency gains (losses)	$ (9)	$ 5	$ (18)	$ (10)

- Definition

The aggregate foreign currency transaction gain (loss) (both realized and unrealized) included in determining net income for the reporting period. Excludes foreign currency transactions designated as hedges of net investment in a foreign entity and intercompany foreign currency transactions that are of a long-term nature, when the entities to the transaction are consolidated, combined, or accounted for by the equity method in the reporting enterprise's financial statements. For certain enterprises, primarily banks, that are dealers in foreign exchange, foreign currency transaction gains (losses) may be disclosed as dealer gains (losses).

+ References + Details

Retirement Plans (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
Retirement Plans (Details) - USD ($) $ in Millions	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Components of net periodic pension cost
Service cost	$ 15	$ 12	$ 43	$ 36
Interest cost	23	22	67	66
Expected return on plan assets	(28)	(21)	(82)	(63)
Amortization of net loss	13	12	35	36
Pension expense	23	$ 25	63	$ 75
Retirement Plans (Textual) [Abstract]
Corporation expects to contribute to its pension plan in 2011	$ 190		190
Corporation contributed to its pension plan			$ 148

- Definition

An amount calculated as a basis for determining the extent of delayed recognition of the effects of changes in the fair value of assets. The expected return on plan assets is determined based on the expected long-term rate of return on plan assets and the market-related value of plan assets.

+ References

+ Details

- Definition

The increase in a defined benefit pension plan's projected benefit obligation or a defined benefit postretirement plan's accumulated postretirement benefit obligation due to the passage of time.

+ References + Details

- Definition

The actuarial present value of benefits attributed by the pension benefit formula to services rendered by employees during the period. The portion of the expected postretirement benefit obligation attributed to employee service during the period. The service cost component is a portion of the benefit obligation and is unaffected by the funded status of the plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 106
-Paragraph 518
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 87
-Paragraph 264
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph a, h
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (h)(1)
-URI http://asc.fasb.org/extlink&oid=6962843&loc=d3e1928-114920

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=6962843&loc=d3e1928-114920

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Service Cost (Component of Net Periodic Pension Cost)
-URI http://asc.fasb.org/extlink&oid=6525008

+ Details

Income Taxes (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended		9 Months Ended
Income Taxes (Details) - USD ($) $ in Millions	Jul. 31, 2011	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Provision (benefit) for income taxes consisted of
Current		$ 169	$ 380	$ 1,073	$ 1,141
Deferred		(252)	(180)	(253)	(242)
Adjustment of deferred tax liability for foreign income tax rate change (*)		29	0	29	0
Total Provision (benefit) for income taxes		$ (54)	$ 200	$ 849	$ 899
Income Taxes (Textual) [Abstract]
Old supplementary tax rate on petroleum operations (in percentage)	20.00%
New supplementary tax rate on petroleum operations (in percentage)	32.00%

- Definition

The component of income tax expense for the period representing amounts of income taxes paid or payable (or refundable) for the period for all income tax obligations as determined by applying the provisions of relevant enacted tax laws to relevant amounts of taxable Income or Loss from continuing operations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 08
-Paragraph h
-Article 4

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 109
-Paragraph 45
-Subparagraph a
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(h))
-URI http://asc.fasb.org/extlink&oid=6881521&loc=d3e23780-122690

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Current Tax Expense (or Benefit)
-URI http://asc.fasb.org/extlink&oid=6509736

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB TOPIC 6.I.7)
-URI http://asc.fasb.org/extlink&oid=6889476&loc=d3e330036-122817

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 9
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32639-109319

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 109
-Paragraph 289
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Staff Accounting Bulletin (SAB)
-Number Topic 6
-Section I
-Subsection 7

+ Details

- Definition

The change during the period in the entity's deferred tax assets and liabilities attributable to continuing operations as determined by applying enacted tax laws other than federal, domestic, foreign, state or local. Items affecting deferred income taxes and required to be disclosed, but not included elsewhere, would also be designated as "Other"; for example, adjustments of a deferred tax liability or asset for enacted changes in tax laws or rates or a change in the tax status of the entity and adjustments to be beginning-of-year balance of a valuation allowance because of a change in circumstance that causes a change in judgment about the realizability of the related deferred tax asset in future periods.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 08
-Paragraph h
-Article 4

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 109
-Paragraph 45
-Subparagraph g, h
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(h))
-URI http://asc.fasb.org/extlink&oid=6881521&loc=d3e23780-122690

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB TOPIC 6.I.7)
-URI http://asc.fasb.org/extlink&oid=6889476&loc=d3e330036-122817

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Deferred Tax Expense (or Benefit)
-URI http://asc.fasb.org/extlink&oid=6510177

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 9
-Subparagraph (g),(h)
-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32639-109319

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Staff Accounting Bulletin (SAB)
-Number Topic 6
-Section I
-Subsection 7

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 109
-Paragraph 8, 16, 17, 289
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Risk Management and Trading Activities (Details) shares in Millions, $ in Millions	Sep. 30, 2011 USD ($) MMcf MMWh MMbbl shares	Dec. 31, 2010 USD ($) MMcf MMWh MMbbl shares
Gross volume of the Corporation's derivative contracts and instruments outstanding
Interest rate (millions of U.S. Dollars)	$ 895
Gross Volume of Derivative Instruments Outstanding Relating to Trading Activities [Member]
Gross volume of the Corporation's derivative contracts and instruments outstanding
Foreign exchange (millions of U.S. Dollars)	621	$ 506
Interest rate (millions of U.S. Dollars)	127	205
Gross Volume of the corporate risk management derivative instruments outstanding [Member]
Gross volume of the Corporation's derivative contracts and instruments outstanding
Foreign exchange (millions of U.S. Dollars)	940	1,025
Interest rate (millions of U.S. Dollars)	$ 895	$ 310
Crude oil and refined petroleum products (millions of barrels) [Member] \| Gross Volume of Derivative Instruments Outstanding Relating to Trading Activities [Member]
Gross volume of the Corporation's derivative contracts and instruments outstanding
Absolute volume of derivative commodity contracts \| MMbbl	2,966	3,328
Crude oil and refined petroleum products (millions of barrels) [Member] \| Gross Volume of the Corporation's Energy Marketing Commodity Contracts Outstanding [Member]
Gross volume of the Corporation's derivative contracts and instruments outstanding
Absolute volume of derivative commodity contracts \| MMbbl	27	30
Crude oil and refined petroleum products (millions of barrels) [Member] \| Gross Volume of the corporate risk management derivative instruments outstanding [Member]
Gross volume of the Corporation's derivative contracts and instruments outstanding
Absolute volume of derivative commodity contracts \| MMbbl	22	35
Natural Gas Millions of Mcf [Member] \| Gross Volume of Derivative Instruments Outstanding Relating to Trading Activities [Member]
Gross volume of the Corporation's derivative contracts and instruments outstanding
Absolute volume of derivative commodity contracts \| MMcf	4,910	4,699
Natural Gas Millions of Mcf [Member] \| Gross Volume of the Corporation's Energy Marketing Commodity Contracts Outstanding [Member]
Gross volume of the Corporation's derivative contracts and instruments outstanding
Absolute volume of derivative commodity contracts \| MMcf	2,532	2,210
Electricity Millions of Megawatt Hours [Member] \| Gross Volume of Derivative Instruments Outstanding Relating to Trading Activities [Member]
Gross volume of the Corporation's derivative contracts and instruments outstanding
Absolute volume of derivative commodity contracts \| MMWh	268	79
Electricity Millions of Megawatt Hours [Member] \| Gross Volume of the Corporation's Energy Marketing Commodity Contracts Outstanding [Member]
Gross volume of the Corporation's derivative contracts and instruments outstanding
Absolute volume of derivative commodity contracts \| MMWh	242	301
Equity securities (millions of shares) [Member] \| Gross Volume of Derivative Instruments Outstanding Relating to Trading Activities [Member]
Gross volume of the Corporation's derivative contracts and instruments outstanding
Equity Securities (millions of shares) \| shares	34	35

Risk Management and Trading Activities (Details 1) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Pre-tax gains (losses) from trading activities
Pre-tax gains (losses) from trading activities	$ (50)	$ (104)	$ 2	$ 29
Foreign Exchange Contracts [Member]
Pre-tax gains (losses) from trading activities
Pre-tax gains (losses) from trading activities	7	2	(1)	8
Commodity Contracts [Member]
Pre-tax gains (losses) from trading activities
Pre-tax gains (losses) from trading activities	(5)	(118)	45	26
Other Contracts [Member]
Pre-tax gains (losses) from trading activities
Pre-tax gains (losses) from trading activities	(52)	12	(42)	(5)
Corporate Risk Management [Member] \| Not designated as hedges [Member]
Net pre-tax gains (losses) on derivative contracts not designated as hedges
Net pre-tax gains (losses) on derivative contracts	(25)	48	(11)	(11)
Corporate Risk Management [Member] \| Foreign Exchange Contracts [Member] \| Not designated as hedges [Member]
Net pre-tax gains (losses) on derivative contracts not designated as hedges
Net pre-tax gains (losses) on derivative contracts	(25)	48	(12)	(4)
Corporate Risk Management [Member] \| Commodity Contracts [Member] \| Not designated as hedges [Member]
Net pre-tax gains (losses) on derivative contracts not designated as hedges
Net pre-tax gains (losses) on derivative contracts	$ 0	$ 0	$ 1	$ (7)

Risk Management and Trading Activities (Details 2) - USD ($) $ in Millions	Sep. 30, 2011	Dec. 31, 2010
Assets
Collateral and counterparty netting	$ (431)	$ (507)
Total derivative contracts (Assets)	1,229	1,463
Other assets measured at fair value on a recurring basis	99	72
Total assets	1,328	1,535
Liabilities
Collateral and counterparty netting	383	328
Total derivative contracts (Liabilities)	(2,107)	(2,707)
Other liabilities measured at fair value on a recurring basis	(58)	0
Total liabilities	(2,165)	(2,707)
Level 1 [Member]
Assets
Collateral and counterparty netting	(58)	(1)
Total derivative contracts (Assets)	227	64
Other assets measured at fair value on a recurring basis	10	20
Total assets	237	84
Liabilities
Collateral and counterparty netting	58	1
Total derivative contracts (Liabilities)	(432)	(323)
Other liabilities measured at fair value on a recurring basis	0	0
Total liabilities	(432)	(323)
Level 2 [Member]
Assets
Collateral and counterparty netting	(220)	(274)
Total derivative contracts (Assets)	1,140	1,052
Other assets measured at fair value on a recurring basis	90	49
Total assets	1,230	1,101
Liabilities
Collateral and counterparty netting	220	274
Total derivative contracts (Liabilities)	(1,522)	(2,267)
Other liabilities measured at fair value on a recurring basis	(58)	0
Total liabilities	(1,580)	(2,267)
Level 3 [Member]
Assets
Collateral and counterparty netting	(20)	(19)
Total derivative contracts (Assets)	301	864
Other assets measured at fair value on a recurring basis	0	3
Total assets	301	867
Liabilities
Collateral and counterparty netting	20	19
Total derivative contracts (Liabilities)	(544)	(455)
Other liabilities measured at fair value on a recurring basis	(1)	0
Total liabilities	(545)	(455)
Collateral and counterparty netting elimination [Member]
Assets
Collateral and counterparty netting	(133)	(213)
Total derivative contracts (Assets)	(439)	(517)
Other assets measured at fair value on a recurring basis	(1)	0
Total assets	(440)	(517)
Liabilities
Collateral and counterparty netting	85	34
Total derivative contracts (Liabilities)	391	338
Other liabilities measured at fair value on a recurring basis	1	0
Total liabilities	392	338
Commodity Contracts [Member]
Assets
Total derivative contracts (Assets)	1,586	1,952
Liabilities
Total derivative contracts (Liabilities)	(2,387)	(3,013)
Commodity Contracts [Member] \| Level 1 [Member]
Assets
Total derivative contracts (Assets)	283	65
Liabilities
Total derivative contracts (Liabilities)	(490)	(324)
Commodity Contracts [Member] \| Level 2 [Member]
Assets
Total derivative contracts (Assets)	1,288	1,308
Liabilities
Total derivative contracts (Liabilities)	(1,645)	(2,519)
Commodity Contracts [Member] \| Level 3 [Member]
Assets
Total derivative contracts (Assets)	320	883
Liabilities
Total derivative contracts (Liabilities)	(557)	(474)
Commodity Contracts [Member] \| Collateral and counterparty netting elimination [Member]
Assets
Total derivative contracts (Assets)	(305)	(304)
Liabilities
Total derivative contracts (Liabilities)	305	304
Foreign Exchange Contracts [Member]
Assets
Total derivative contracts (Assets)	1	1
Liabilities
Total derivative contracts (Liabilities)	(36)	(12)
Foreign Exchange Contracts [Member] \| Level 1 [Member]
Assets
Total derivative contracts (Assets)	0	0
Liabilities
Total derivative contracts (Liabilities)	0	0
Foreign Exchange Contracts [Member] \| Level 2 [Member]
Assets
Total derivative contracts (Assets)	1	1
Liabilities
Total derivative contracts (Liabilities)	(36)	(12)
Foreign Exchange Contracts [Member] \| Level 3 [Member]
Assets
Total derivative contracts (Assets)	0	0
Liabilities
Total derivative contracts (Liabilities)	0	0
Foreign Exchange Contracts [Member] \| Collateral and counterparty netting elimination [Member]
Assets
Total derivative contracts (Assets)	0	0
Liabilities
Total derivative contracts (Liabilities)	0	0
Interest Rate and Other [Member]
Assets
Total derivative contracts (Assets)	73	17
Interest Rate and Other [Member] \| Level 1 [Member]
Assets
Total derivative contracts (Assets)	2	0
Interest Rate and Other [Member] \| Level 2 [Member]
Assets
Total derivative contracts (Assets)	71	17
Interest Rate and Other [Member] \| Level 3 [Member]
Assets
Total derivative contracts (Assets)	1	0
Interest Rate and Other [Member] \| Collateral and counterparty netting elimination [Member]
Assets
Total derivative contracts (Assets)	(1)	0
Other [Member]
Liabilities
Total derivative contracts (Liabilities)	(67)	(10)
Other [Member] \| Level 1 [Member]
Liabilities
Total derivative contracts (Liabilities)	0	0
Other [Member] \| Level 2 [Member]
Liabilities
Total derivative contracts (Liabilities)	(61)	(10)
Other [Member] \| Level 3 [Member]
Liabilities
Total derivative contracts (Liabilities)	(7)	0
Other [Member] \| Collateral and counterparty netting elimination [Member]
Liabilities
Total derivative contracts (Liabilities)	$ 1	$ 0

Risk Management and Trading Activities (Details 3) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Changes in financial assets and liabilities at fair value based on level 3 inputs
Balance at beginning of period	$ 372	$ 41	$ 412	$ 84
Unrealized gains (losses)
Included in earnings	(85)	105	19	163
Included in other comprehensive income	13	(18)	30	62
Purchases	415	347	1,932	782
Sales	(536)	(397)	(2,131)	(745)
Settlements	(162)	(1)	(194)	(46)
Transfers into Level 3	(222)	215	(211)	57
Transfers out of Level 3	(39)	12	(101)	(53)
Balance at end of period	$ (244)	$ 304	$ (244)	$ 304

Risk Management and Trading Activities (Details 4) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Level 1 [Member]
Net transfers into and out of each level of the fair value hierarchy
Fair Value Measurements net transfers in	$ (4)	$ 95	$ (12)	$ 123
Fair Value Measurements net transfers out	39	89	318	23
Fair Value Measurements net transfers into/out of	35	184	306	146
Level 2 [Member]
Net transfers into and out of each level of the fair value hierarchy
Fair Value Measurements net transfers in	28	(8)	34	121
Fair Value Measurements net transfers out	198	(403)	(28)	(271)
Fair Value Measurements net transfers into/out of	226	(411)	6	(150)
Level 3 [Member]
Net transfers into and out of each level of the fair value hierarchy
Fair Value Measurements net transfers in	(222)	215	(211)	57
Fair Value Measurements net transfers out	(39)	12	(101)	(53)
Fair Value Measurements net transfers into/out of	$ (261)	$ 227	$ (312)	$ 4

Risk Management and Trading Activities (Details 5) - USD ($) $ in Millions	Sep. 30, 2011	Dec. 31, 2010
Accounts Receivable [Member]
Gross and net fair values of the Corporation's risk management and trading derivative instruments
Derivative contracts designated as hedging instruments	$ 153	$ 235
Derivative contracts not designated as hedging instruments	12,106	11,619
Gross fair value of derivative contracts	12,259	11,854
Master netting arrangements	(10,897)	(10,178)
Cash collateral (received) posted	(133)	(213)
Net fair value of derivative contracts	1,229	1,463
Accounts Payable [Member]
Gross and net fair values of the Corporation's risk management and trading derivative instruments
Derivative contracts designated as hedging instruments	(284)	(485)
Derivative contracts not designated as hedging instruments	(12,805)	(12,434)
Gross fair value of derivative contracts	(13,089)	(12,919)
Master netting arrangements	10,897	10,178
Cash collateral (received) posted	85	34
Net fair value of derivative contracts	(2,107)	(2,707)
Commodity Contracts [Member] \| Accounts Receivable [Member]
Gross and net fair values of the Corporation's risk management and trading derivative instruments
Derivative contracts designated as hedging instruments	97	225
Derivative contracts not designated as hedging instruments	12,040	11,581
Commodity Contracts [Member] \| Accounts Payable [Member]
Gross and net fair values of the Corporation's risk management and trading derivative instruments
Derivative contracts designated as hedging instruments	(281)	(483)
Derivative contracts not designated as hedging instruments	(12,657)	(12,383)
Foreign Exchange Contracts [Member] \| Accounts Receivable [Member]
Gross and net fair values of the Corporation's risk management and trading derivative instruments
Derivative contracts not designated as hedging instruments	6	7
Foreign Exchange Contracts [Member] \| Accounts Payable [Member]
Gross and net fair values of the Corporation's risk management and trading derivative instruments
Derivative contracts not designated as hedging instruments	(41)	(19)
Other [Member] \| Accounts Receivable [Member]
Gross and net fair values of the Corporation's risk management and trading derivative instruments
Derivative contracts designated as hedging instruments	56	10
Derivative contracts not designated as hedging instruments	60	31
Other [Member] \| Accounts Payable [Member]
Gross and net fair values of the Corporation's risk management and trading derivative instruments
Derivative contracts designated as hedging instruments	(3)	(2)
Derivative contracts not designated as hedging instruments	$ (107)	$ (32)

Risk Management and Trading Activities (Details) (Textual) $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2011 USD ($) bbl	Sep. 30, 2010 USD ($)	Sep. 30, 2011 USD ($) bbl	Sep. 30, 2010 USD ($)	Dec. 31, 2010 USD ($)
Risk Management and Trading Activities (Textual) [Abstract]
Corporation reclassified after-tax gains/(losses) from accumulated other comprehensive income to earnings	$ (82)	$ (85)	$ (244)	$ (252)	$ (338)
Gain (loss) from hedge ineffectiveness reflected in earnings	$ (2)		$ (4)
Number of other open crude oil and natural gas hedges \| bbl	0		0
Increase (decrease) of exploration and production sales and other operating revenue due to hedging activities	$ (131)	(134)	$ (387)	(398)	(533)
Gross notional amount of interest rate swaps	895		895
Change in the fair value of interest rate swaps - increase/(decrease)	42	5	45	12
Change in the carrying value of the hedged fixed rate debt - increase/(decrease)	42	5	$ 45	12
Percentage of Information disclosed for trading partnership			100.00%
Fixed rate, long-term debt-carrying value	5,583		$ 5,583		5,569
Long-term debt fair value	6,723		6,723		6,353
Cash received as collateral	133		133		213
Corporation posted cash to counterparties	85		85		34
Outstanding letters of credit	1,671		1,671
Net liability related to derivatives with contingent collateral provisions	1,059		1,059
Cash collateral posted for derivatives with contingent collateral provisions	11		$ 11
Voting interest in trading partnership			50.00%
Additional collateral	333		$ 333
The length of time over which the Corporation hedges exposure to variability in future cash flows (in number of years)			2 years or less
Hedge contracts associated with the termination of Brent crude oil cash flow hedges covering the period through 2012 (barrels per day) \| bbl			24,000
Maximum duration for the outstanding hedging contracts (in number of years)			3 years
Energy Marketing Activities [Member]
Risk Management and Trading Activities (Textual) [Abstract]
After-tax deferred gains/(losses) in Accumulated other comprehensive income	(71)		$ (71)		(147)
Reclassification of accumulated other comprehensive income/(losses) into earnings over the next twelve months			(48)
Corporation reclassified after-tax gains/(losses) from accumulated other comprehensive income to earnings	(24)	(56)	(77)	(257)
Gain (loss) from hedge ineffectiveness reflected in earnings		1		1
Increase (decrease) in the after tax deferred losses related to the changes in the fair value of energy marketing cash flow hedge positions	$ 4	34	$ 1	193
Integrated Oil Companies [Member]
Risk Management and Trading Activities (Textual) [Abstract]
Fair value, concentration of risk, accounts receivable	26.00%		26.00%
Government Entities [Member]
Risk Management and Trading Activities (Textual) [Abstract]
Fair value, concentration of risk, accounts receivable	9.00%		9.00%
Manufacturing [Member]
Risk Management and Trading Activities (Textual) [Abstract]
Fair value, concentration of risk, accounts receivable	8.00%		8.00%
Financial Institutions [Member]
Risk Management and Trading Activities (Textual) [Abstract]
Fair value, concentration of risk, accounts receivable	7.00%		7.00%
Refiners [Member]
Risk Management and Trading Activities (Textual) [Abstract]
Fair value, concentration of risk, accounts receivable	7.00%		7.00%
Services [Member]
Risk Management and Trading Activities (Textual) [Abstract]
Fair value, concentration of risk, accounts receivable	7.00%		7.00%
Trading Companies [Member]
Risk Management and Trading Activities (Textual) [Abstract]
Fair value, concentration of risk, accounts receivable	7.00%		7.00%
Real Estate [Member]
Risk Management and Trading Activities (Textual) [Abstract]
Fair value, concentration of risk, accounts receivable	6.00%		6.00%
Not designated as hedges [Member] \| Energy Marketing Activities [Member]
Risk Management and Trading Activities (Textual) [Abstract]
Net realized and unrealized pre-tax gains (losses) on derivative contracts not designated as hedges	$ 8	50	$ 36	162
Corporate Risk Management [Member]
Risk Management and Trading Activities (Textual) [Abstract]
After-tax deferred gains/(losses) in Accumulated other comprehensive income	(400)		(400)		$ (638)
Reclassification of accumulated other comprehensive income/(losses) into earnings over the next twelve months			(325)
Corporate Risk Management [Member] \| Not designated as hedges [Member]
Risk Management and Trading Activities (Textual) [Abstract]
Net realized and unrealized pre-tax gains (losses) on derivative contracts not designated as hedges	$ (25)	$ 48	$ (11)	$ (11)

Weighted Average Common Shares (Details) - shares	3 Months Ended		9 Months Ended
Weighted Average Common Shares (Details) - shares	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Weighted Average number of shares outstanding - basic and diluted
Common shares - basic	337,380,000	325,452,000	336,721,000	325,166,000
Effect of dilutive securities
Restricted common stock	1,268,000	1,369,000	1,372,000	1,354,000
Stock options	1,574,000	813,000	1,745,000	822,000
Common shares - diluted	340,222,000	327,634,000	339,838,000	327,342,000
Weighted Average Common Shares (Textual) [Abstract]
Stock options issued			2,201,445	2,768,715
Restricted stock issued			734,005	944,250
Out-of-the money options	4,180,000	8,932,000	2,763,000	5,797,000

Equity and Comprehensive Income (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Changes in Equity :
Beginning Balance			$ 16,809	$ 13,528
Net Income (loss)	$ 267	$ 1,091	1,810	2,055
Deferred gains (losses) on cash flow hedges, after-tax
Effect of hedge losses recognized in income			321	508
Net change in fair value of cash flow hedges			(8)	(226)
Change in post retirement plan liabilities, after-tax			22	24
Change in foreign currency translation adjustment and other			(40)	(6)
Comprehensive income (loss)			2,105	2,355
Activity related to restricted common stock awards, net			39	44
Employee stock options, including income tax benefits			105	54
Cash dividends declared			(102)	(98)
Noncontrolling interests, net			(42)	(55)
Ending Balance	18,914	15,828	18,914	15,828
Total Hess Stockholders' Equity [Member]
Changes in Equity :
Beginning Balance			16,689	13,384
Net Income (loss)			1,834	2,067
Deferred gains (losses) on cash flow hedges, after-tax
Effect of hedge losses recognized in income			321	508
Net change in fair value of cash flow hedges			(8)	(226)
Change in post retirement plan liabilities, after-tax			22	24
Change in foreign currency translation adjustment and other			(43)	(8)
Comprehensive income (loss)			2,126	2,365
Activity related to restricted common stock awards, net			39	44
Employee stock options, including income tax benefits			105	54
Cash dividends declared			(102)	(98)
Noncontrolling interests, net			(24)	(19)
Ending Balance	18,833	15,730	18,833	15,730
Noncontrolling Interests [Member]
Changes in Equity :
Beginning Balance			120	144
Net Income (loss)			(24)	(12)
Deferred gains (losses) on cash flow hedges, after-tax
Change in foreign currency translation adjustment and other			3	2
Comprehensive income (loss)			(21)	(10)
Noncontrolling interests, net			(18)	(36)
Ending Balance	$ 81	$ 98	$ 81	$ 98

Segment Information (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
Segment Information (Details) - USD ($) $ in Millions	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010	Dec. 31, 2010
Operating revenues
Less: Transfers between affiliates	$ (31)	$ (39)	$ (98)	$ (111)
Total	8,665	7,864	28,733	24,855
Net income (loss) attributable to Hess Corporation
Net income (loss) attributable to Hess Corporation by operating segment	298	1,154	1,834	2,067
Identifiable assets by operating segment
Total	37,339		37,339		$ 35,396
Segment Information (Textual) [Abstract]
Excise and Similar Taxes	600	565	1,750	1,650
Exploration and Production [Member]
Operating revenues
Segment Revenues Gross	2,217	2,368	7,760	6,761
Net income (loss) attributable to Hess Corporation
Net income (loss) attributable to Hess Corporation by operating segment	422	1,277	2,148	2,316
Identifiable assets by operating segment
Total	31,122		31,122		28,242
Marketing and Refining [Member]
Operating revenues
Segment Revenues Gross	6,479	5,535	21,071	18,205
Net income (loss) attributable to Hess Corporation
Net income (loss) attributable to Hess Corporation by operating segment	(23)	(38)	(23)	30
Identifiable assets by operating segment
Total	5,663		5,663		6,377
Corporate, including interest [Member]
Net income (loss) attributable to Hess Corporation
Net income (loss) attributable to Hess Corporation by operating segment	(101)	$ (85)	(291)	$ (279)
Identifiable assets by operating segment
Total	$ 554		$ 554		$ 777

Subsequent Event (Details) $ in Millions	1 Months Ended
Subsequent Event (Details) $ in Millions	Oct. 31, 2011 USD ($) ac	Sep. 30, 2011
Consol Energy Inc [Member]
Subsequent Event [Line Items]
Percentage of interest in acres acquired from Consol Energy Inc.	50.00%
Acreage acquired from Consol Energy Inc (In acres) \| ac	200,000
Cash paid for percentage of interest in acres acquired	$ 59
Total drilling costs payable over five year period (maximum)	$ 534
Years to pay the drilling costs	5 years
Drilling carry percentage share	50.00%
South Arne Field [Member]
Subsequent Event [Line Items]
Acquisition of additional interests in oil and gas fields	4.00%
New percentage interest in South Arne Field	62.00%
Prior percentage interest in South Arne Field		58.00%
Purchase price for acquisition of additional interests in oil and gas fields	$ 116