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Document and Entity Information	6 Months Ended
Document and Entity Information	Jun. 30, 2013 shares
Document Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2013
Document Fiscal Year Focus	2013
Document Fiscal Period Focus	Q2
Trading Symbol	HES
Entity Registrant Name	HESS CORP
Entity Central Index Key	0000004447
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding	343,401,303

CONSOLIDATED BALANCE SHEET - USD ($) $ in Millions	Jun. 30, 2013	Dec. 31, 2012
CURRENT ASSETS
Cash and cash equivalents	$ 725	$ 642
Accounts receivable
Trade	1,640	4,057
Other	314	281
Inventories	683	1,259
Assets held for sale	5,880	1,092
Other current assets	750	1,056
Total current assets	9,992	8,387
INVESTMENTS IN AFFILIATES	380	443
PROPERTY, PLANT AND EQUIPMENT
Total - at cost	41,195	45,553
Less: Reserves for depreciation, depletion, amortization and lease impairment	15,025	16,746
Property, plant and equipment - net	26,170	28,807
GOODWILL	1,869	2,208
DEFERRED INCOME TAXES	2,753	3,126
OTHER ASSETS	264	470
TOTAL ASSETS	41,428	43,441
CURRENT LIABILITIES
Accounts payable	565	2,809
Accrued liabilities	2,792	3,287
Taxes payable	358	960
Liabilities associated with assets held for sale	2,664	539
Short-term debt and current maturities of long-term debt	354	787
Total current liabilities	6,733	8,382
LONG-TERM DEBT	5,446	7,324
DEFERRED INCOME TAXES	2,106	2,662
ASSET RETIREMENT OBLIGATIONS	1,971	2,212
OTHER LIABILITIES AND DEFERRED CREDITS	1,199	1,658
Total liabilities	17,455	22,238
Hess Corporation Stockholders' Equity
Common stock, par value $1.00 Authorized - 600,000,000 shares Issued - 343,401,303 shares at June 30, 2013; 341,527,617 shares at December 31, 2012	343	342
Capital in excess of par value	3,604	3,524
Retained earnings	20,369	17,717
Accumulated other comprehensive income (loss)	(419)	(493)
Total Hess Corporation stockholders' equity	23,897	21,090
Noncontrolling interests	76	113
Total equity	23,973	21,203
TOTAL LIABILITIES AND EQUITY	$ 41,428	$ 43,441

CONSOLIDATED BALANCE SHEET (Parenthetical) - $ / shares	Jun. 30, 2013	Dec. 31, 2012
Statement Of Financial Position [Abstract]
Common stock, par value	$ 1.00	$ 1.00
Common stock, shares authorized	600,000,000	600,000,000
Common stock, shares issued	343,401,303	341,527,617

STATEMENT OF CONSOLIDATED INCOME - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
REVENUES AND NON-OPERATING INCOME
Sales and other operating revenues	$ 3,011	$ 3,324	$ 6,477	$ 6,220
Gains on asset sales	1,111		1,799	36
Other, net	(17)	(3)	(54)	26
Total revenues and non-operating income	4,105	3,321	8,222	6,282
COSTS AND EXPENSES
Cost of products sold (excluding items shown separately below)	421	332	1,017	602
Operating costs and expenses	510	550	1,095	1,085
Production and severance taxes	97	127	227	265
Exploration expenses, including dry holes and lease impairment	200	196	419	449
General and administrative expenses	167	144	316	276
Interest expense	99	105	205	209
Depreciation, depletion and amortization	613	746	1,292	1,408
Asset impairments		59		59
Total costs and expenses	2,107	2,259	4,571	4,353
INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	1,998	1,062	3,651	1,929
Provision for income taxes	409	522	879	850
INCOME FROM CONTINUING OPERATIONS	1,589	540	2,772	1,079
INCOME (LOSS) FROM DISCONTINUED OPERATIONS, NET OF INCOME TAXES	27	(5)	117	16
NET INCOME	1,616	535	2,889	1,095
Less: Net income (loss) attributable to noncontrolling interests	185	(14)	182	1
NET INCOME ATTRIBUTABLE TO HESS CORPORATION	$ 1,431	$ 549	$ 2,707	$ 1,094
BASIC:
Continuing operations	$ 4.18	$ 1.58	$ 7.64	$ 3.17
Discontinued operations	0.03	0.04	0.33	0.07
NET INCOME PER SHARE	4.21	1.62	7.97	3.24
DILUTED:
Continuing operations	4.13	1.58	7.56	3.14
Discontinued operations	0.03	0.03	0.32	0.07
NET INCOME PER SHARE	$ 4.16	$ 1.61	$ 7.88	$ 3.21
WEIGHTED AVERAGE NUMBER OF COMMON SHARES OUTSTANDING (DILUTED)	344.0	340.4	343.4	340.4
COMMON STOCK DIVIDENDS PER SHARE	$ 0.10	$ 0.10	$ 0.20	$ 0.20

STATEMENT OF CONSOLIDATED COMPREHENSIVE INCOME - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 1,616	$ 535	$ 2,889	$ 1,095
Derivatives designated as cash flow hedges
Effect of hedge (gains) losses reclassified to income	(45)	312	(41)	466
Income taxes on effect of hedge (gains) losses reclassified to income	17	(119)	15	(176)
Net effect of hedge (gains) losses reclassified to income	(28)	193	(26)	290
Change in fair value of cash flow hedges	147	443	165	(36)
Income taxes on change in fair value of cash flow hedges	(56)	(174)	(63)	13
Net change in fair value of cash flow hedges	91	269	102	(23)
Change in derivatives designated as cash flow hedges, after-tax	63	462	76	267
Pension and other postretirement plans
Reduction of unrecognized actuarial losses			245
Income taxes on actuarial changes in plan liabilities			(89)
Reduction of unrecognized actuarial losses, net			156
Amortization of net actuarial losses	12	22	34	43
Income taxes on amortization of net actuarial losses	(4)	(8)	(12)	(16)
Net effect of amortization of net actuarial losses	8	14	22	27
Change in pension and other postretirement plans, after-tax	8	14	178	27
Foreign currency translation adjustment
Foreign currency translation adjustment	(124)	(204)	(293)	(8)
Reclassified to Gains on asset sales	94		119
Change in foreign currency translation adjustment	(30)	(204)	(174)	(8)
TOTAL OTHER COMPREHENSIVE INCOME	41	272	80	286
COMPREHENSIVE INCOME	1,657	807	2,969	1,381
Less: Comprehensive income (loss) attributable to noncontrolling interests	193	(20)	188	(1)
COMPREHENSIVE INCOME ATTRIBUTABLE TO HESS CORPORATION	$ 1,464	$ 827	$ 2,781	$ 1,382

STATEMENT OF CONSOLIDATED CASH FLOWS - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 2,889	$ 1,095
Adjustments to reconcile net income to net cash provided by operating activities
Gains on asset sales	(1,799)	(36)
Depreciation, depletion and amortization	1,292	1,408
Asset impairments		59
Exploratory dry hole costs	68	126
Lease impairment	128	115
Stock compensation expense	34	37
Provision (benefit) for deferred income taxes	223	(55)
Income from discontinued operations	(117)	(16)
Changes in operating assets and liabilities	(721)	(556)
Cash provided by operating activities - continuing operations	1,997	2,177
Cash provided by operating activities - discontinued operations	69	51
Net cash provided by operating activities	2,066	2,228
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(2,981)	(3,793)
Proceeds from asset sales	3,799	132
Other, net	(105)	(42)
Cash provided by (used in) investing activities - continuing operations	713	(3,703)
Cash provided by (used in) investing activities - discontinued operations	(38)	(62)
Net cash provided by (used in) investing activities	675	(3,765)
CASH FLOWS FROM FINANCING ACTIVITIES
Net borrowings (repayments) of debt with maturities of 90 days or less	(1,748)	1,697
Debt with maturities of greater than 90 days
Borrowings	185	403
Repayments	(877)	(408)
Cash dividends paid	(69)	(102)
Noncontrolling interests, net	(182)
Other, net	42	8
Cash provided by (used in) financing activities - continuing operations	(2,649)	1,598
Cash provided by (used in) financing activities - discontinued operations	(9)	(3)
Net cash provided by (used in) financing activities	(2,658)	1,595
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	83	58
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR	642	351
CASH AND CASH EQUIVALENTS AT END OF PERIOD	$ 725	$ 409

STATEMENT OF CONSOLIDATED EQUITY - USD ($) $ in Millions	Total	Common Stock [Member]	Capital in Excess of Par [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Total Hess Stockholders' Equity [Member]	Noncontrolling Interests [Member]
Beginning balance at Dec. 31, 2011	$ 18,592	$ 340	$ 3,417	$ 15,826	$ (1,067)	$ 18,516	$ 76
Net income	1,095			1,094		1,094	1
Other comprehensive income (loss)	286				288	288	(2)
Comprehensive income (loss)	1,381					1,382	(1)
Restricted common stock awards, net	26	2	24			26
Employee stock options, including income tax benefits	26		26			26
Performance share units	3		3			3
Cash dividends declared	(68)			(68)		(68)
Noncontrolling interests, net	(1)			2		2	(3)
Ending balance at Jun. 30, 2012	19,959	342	3,470	16,854	(779)	19,887	72
Beginning balance at Dec. 31, 2012	21,203	342	3,524	17,717	(493)	21,090	113
Net income	2,889			2,707		2,707	182
Other comprehensive income (loss)	80				74	74	6
Comprehensive income (loss)	2,969					2,781	188
Restricted common stock awards, net	25	1	24			25
Employee stock options, including income tax benefits	48		48			48
Performance share units	8		8			8
Cash dividends declared	(69)			(69)		(69)
Noncontrolling interests, net	(211)			14		14	(225)
Ending balance at Jun. 30, 2013	$ 23,973	$ 343	$ 3,604	$ 20,369	$ (419)	$ 23,897	$ 76

- Definition

The change in equity [net assets] of a business enterprise during a period from transactions and other events and circumstances from non-owner sources which are attributable to the economic entity, including both controlling (parent) and noncontrolling interests. It includes all changes in equity during a period except those resulting from investments by owners and distributions to owners, including any and all transactions which are directly or indirectly attributable to that ownership interest in subsidiary equity which is not attributable to the parent.

+ References + Details

- Definition

The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.

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- Definition

Amount of stockholders' equity (deficit), net of receivables from officers, directors, owners, and affiliates of the entity, attributable to both the parent and noncontrolling interests. Amount excludes temporary equity. Alternate caption for the concept is permanent equity.

+ References + Details

Basis of Presentation	6 Months Ended
Basis of Presentation	Jun. 30, 2013
Accounting Policies [Abstract]
Basis of Presentation	1. Basis of Presentation The financial statements included in this report reflect all normal and recurring adjustments which, in the opinion of management, are necessary for a fair presentation of Hess Corporation’s (the Corporation or Hess) consolidated financial position at June 30, 2013 and December 31, 2012 and the consolidated results of operations for the three and six month periods ended June 30, 2013 and 2012 and the consolidated cash flows for the six month periods ended June 30, 2013 and 2012. The unaudited results of operations for the interim periods reported are not necessarily indicative of results to be expected for the full year. In March 2013, the Corporation announced an asset sales program that includes divesting its oil and gas properties in Indonesia and Thailand and its downstream businesses to continue the transformation into a more focused pure play exploration and production (E&P) company. The downstream businesses to be divested include the Corporation’s terminal, retail, energy marketing and energy trading operations. In July 2013, the Corporation announced an agreement to sell its energy marketing business. The Corporation has initiated a sales process for each of the remaining planned divestitures and anticipates completing the divestitures within one year of the announcement of the asset sales program. In February 2013, the Corporation ceased refining at its Port Reading facility, completing its exit from all refining operations. The results of the terminal, retail, energy marketing, energy trading and Port Reading refining operations (the “downstream businesses”) have been classified as discontinued operations for all periods presented. See Note 2, Discontinued Operations — Downstream Businesses and Note 14, Subsequent Event. Unless indicated otherwise, the information in the notes to the Consolidated Financial Statements relates to the Corporation’s continuing operations. These 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, 2012. Certain information in the financial statements and notes has been reclassified to conform to the current period presentation. *Recently adopted accounting pronouncements:* Effective January 1, 2013, the Corporation adopted ASU 2013-02, Comprehensive Income (Topic 220): Reporting of Amounts Reclassified Out of Accumulated Other Comprehensive Income (AOCI) which requires aggregated disclosures of amounts reclassified out of AOCI as well as a presentation of changes in AOCI balances by component. The changes in AOCI by component, including amounts reclassified out of AOCI in their entirety are presented in the Statement of Consolidated Comprehensive Income. Effective January 1, 2013, the Corporation adopted ASU 2011-11, Balance Sheet (Topic 210): Disclosures about Offsetting Assets and Liabilities which requires disclosure of information needed to evaluate the effects or potential effects of the contractual right of setoff for assets and liabilities. This accounting standard update applies to assets and liabilities related to financial instruments and derivatives subject to an enforceable master netting arrangement or similar agreement. The required disclosures are presented in Note 13, Risk Management and Trading Activities.

- Definition

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

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+ Details

Discontinued Operations - Downstream Businesses

6 Months Ended

Jun. 30, 2013

Discontinued Operations And Disposal Groups [Abstract]

Discontinued Operations - Downstream Businesses

2. Discontinued Operations — Downstream Businesses

As a result of the Corporation’s plans to divest its downstream businesses, the results of operations for these businesses have been reported as discontinued operations in the Statement of Consolidated Income and the related assets and liabilities have been classified as held for sale at June 30, 2013 in the Consolidated Balance Sheet. The downstream businesses were previously included in the Marketing and Refining segment.

Sales and other operating revenues and Income (loss) from discontinued operations for the downstream businesses were as follows:


	Three Months Ended June 30,					Six Months Ended June 30,
	2013		2012			2013		2012
	(In millions)
Sales and other operating revenues	$	5,652	$	5,991		$	13,065	$	12,791

Income (loss) from discontinued operations before income taxes	$	31	$	(6	)	$	175	$	24
Provision (benefit) for income taxes		4		(1	)		58		8

Income (loss) from discontinued operations, net of income taxes		27		(5	)		117		16
Less: Net income (loss) attributable to noncontrolling interests		16		(17	)		6		(8	)

Net income (loss) from discontinued operations attributable to Hess Corporation	$	11	$	12		$	111	$	24

The following table presents the assets and liabilities of the discontinued downstream businesses that are classified as held for sale (in millions):


	June 30, 2013
Accounts receivable	$	2,138
Inventories		605
Investment in affiliates		177
Property, plant and equipment, net		1,221
Other assets		156

Total assets	$	4,297

Accounts payable and accrued liabilities	$	2,122
Other liabilities and deferred credits		130

Total liabilities	$	2,252

The inventories of the downstream businesses consisted of $1,304 million of refined petroleum products and natural gas, less a last-in, first out (LIFO) adjustment of $801 million, and $102 million of merchandise. As a result of the cessation of refining operations at the Port Reading facility, in the first quarter of 2013, the Corporation recognized a gain of $218 million ($137 million after income taxes) relating to the liquidation of LIFO inventories and recorded additional depreciation of $80 million. The LIFO gain and additional depreciation were included in Income (loss) from discontinued operations.

- Definition

The entire disclosure for the facts and circumstances leading to the completed or expected disposal, manner and timing of disposal, the gain (loss) recognized in the income statement and the income statement caption that includes that gain (loss), amounts of revenues and pretax profit or loss reported in discontinued operations, the segment in which the disposal group was reported, and the classification (whether sold or classified as held for sale) and carrying value of the assets and liabilities comprising the disposal group. Includes all disposal groups, including those classified as components of the entity (discontinued operations).

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-Topic 205
-SubTopic 20
-Section 45
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=6892542&loc=d3e1012-107759

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 45
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=8077374&loc=d3e2443-110228

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-Name Accounting Standards Codification
-Topic 360
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-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6391110&loc=d3e2941-110230

Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 144
-Paragraph 43-48
-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

Exit and Disposal Costs

6 Months Ended

Jun. 30, 2013

Restructuring And Related Activities [Abstract]

Exit and Disposal Costs

3. Exit and Disposal Costs

The following table provides the components of and changes in the Corporation’s restructuring accruals:


	E&P			Corporate and Other		Downstream Businesses			Total
	(In millions)
Employee Severance
Balance at January 1, 2013	$	—		$	—	$	—		$	—
Provision		83			19		89			191	(a)
Payments		(8	)		—		(2	)		(10	)

Balance at June 30, 2013		75			19		87			181

Facility and Other Exit Costs
Balance at January 1, 2013		—			—		—			—
Provision		9	(b)		—		35	(c)		44
Payments		(9	)		—		(22	)		(31	)

Balance at June 30, 2013		—			—		13			13

Total restructuring accruals at June 30, 2013	$	75		$	19	$	100		$	194

(a)

Of the total employee severance charges for the six months ended June 30, 2013, $44 million was included in Operating costs and expenses, $15 million in Exploration expenses, $43 million in General and administrative expenses and $89 million in Income (loss) from discontinued operations. Total employee severance charges for the three months ended June 30, 2013 were $33 million, of which $10 million was included in Operating costs and expenses, $1 million in Exploration expenses, $2 million in General and administrative expenses and $20 million in Income (loss) from discontinued operations.

(b)

Included in General and administrative expenses.

(c)

Included in Income (loss) from discontinued operations.

The employee severance charges primarily resulted from the Corporation’s asset sales program announced in March 2013, which was initiated to continue its transformation to a more focused pure play E&P company. The severance charges were based on probable amounts incurred under ongoing severance arrangements or other statutory requirements, plus amounts earned through June 30, 2013 under enhanced benefit arrangements. The Corporation expects to incur additional enhanced benefit charges of approximately $80 million beyond the amounts accrued at June 30, 2013, of which $10 million relates to E&P, $25 million to Corporate and Other and $45 million to discontinued operations. These additional enhanced benefit charges will be recognized ratably over the estimated future service period required to earn the benefit. The Corporation’s estimate of employee severance costs could change due to a number of factors, including the number of employees that work through the requisite service date and the timing of when each divestiture occurs. The facility and other exit costs relate to the shutdown of Port Reading refining operations and contract termination and other costs resulting from the Corporation’s exit from Russian operations. The Corporation expects to incur approximately $35 million of additional costs at the Port Reading facility beyond the amounts accrued at June 30, 2013, to idle refinery equipment.

- Definition

The entire disclosure for restructuring and related activities. Description of restructuring activities such as exit and disposal activities, include facts and circumstances leading to the plan, the expected plan completion date, the major types of costs associated with the plan activities, total expected costs, the accrual balance at the end of the period, and the periods over which the remaining accrual will be settled.

+ References + Details

Dispositions	6 Months Ended
Dispositions	Jun. 30, 2013
Business Combinations [Abstract]
Dispositions	4. Dispositions In April 2013, the Corporation completed the sale of its Russian subsidiary, Samara-Nafta, for cash proceeds of $2.1 billion after working capital and other adjustments. Based on the Corporation’s 90% interest in Samara-Nafta, net proceeds to Hess were approximately $1.9 billion. The transaction resulted in a nontaxable gain of $1,119 million after deducting the net book value of assets, including allocated goodwill of $148 million. After reduction of the noncontrolling interest holder’s share of $168 million, which is reflected in Net income (loss) attributable to noncontrolling interests, the net gain attributable to the Corporation was $951 million. In the first quarter of 2013, the Corporation sold its interests in the Azeri-Chirag-Guneshli (ACG) fields (Hess 3%), offshore Azerbaijan in the Caspian Sea, and the associated Baku-Tbilisi-Ceyhan (BTC) oil transportation pipeline company (Hess 2%) for cash proceeds of $884 million. The transaction resulted in an after-tax gain of $360 million, after deducting the net book value of assets including allocated goodwill of $52 million. The Corporation also completed the sale of its interests in the Beryl fields (Hess 22%) and the Scottish Area Gas Evacuation (SAGE) pipeline in the United Kingdom North Sea for cash proceeds of $442 million. The transaction resulted in an after-tax gain of $323 million, after deducting the net book value of assets including allocated goodwill of $48 million. In January 2012, the Corporation completed the sale of its interest in the Snohvit Field (Hess 3%), a liquefied natural gas project offshore Norway, for cash proceeds of $132 million. The transaction resulted in an after-tax gain of $36 million.

Inventories

6 Months Ended

Jun. 30, 2013

Inventory Disclosure [Abstract]

Inventories

5. Inventories

Inventories consisted of the following:


	June 30, 2013		December 31, 2012
	(In millions)
Crude oil and other charge stocks	$	293	$	493
Refined petroleum products and natural gas		—		1,362
Less: LIFO		—		(1,123	)

		293		732
Merchandise, materials and supplies		390		527

Total inventories	$	683	$	1,259

The inventories of the downstream businesses have been classified as Assets held for sale in the Consolidated Balance Sheet at June 30, 2013.

Property, Plant and Equipment

6 Months Ended

Jun. 30, 2013

Text Block [Abstract]

Property, Plant and Equipment

6. Property, Plant and Equipment

Assets Held for Sale

Exploration and Production: In March 2013, the Corporation approved a plan to divest its E&P assets in Thailand (comprising the Pailin (Hess 15%) and Sinphuhorm (Hess 35%) fields) and Indonesia (comprising the Pangkah (Hess 75%) and Natuna (Hess 23%) fields). At June 30, 2013, the book value of assets associated with these properties totaled $1,583 million, primarily consisting of the net property, plant and equipment balances and allocated goodwill of $170 million, which were reported as Assets held for sale. In addition, liabilities related to these properties totaled $412 million, primarily consisting of asset retirement obligations and deferred income taxes, which were reported in Liabilities associated with assets held for sale. At December 31, 2012, assets and liabilities related to the ACG and Beryl fields, which were divested in the first quarter of 2013, were classified as held for sale.

Downstream Businesses: As of June 30, 2013, the assets and liabilities of the downstream businesses have been classified as held for sale. In July 2013, the Corporation announced an agreement to sell its energy marketing business for $1,025 million before normal post-closing adjustments. See Note 2, Discontinued Operations — Downstream Businesses and Note 14, Subsequent Event.

Capitalized Exploratory Well Costs: The following table discloses the net changes in capitalized exploratory well costs pending determination of proved reserves for the six months ended June 30, 2013 (in millions):


Balance at January 1	$	2,259
Additions to capitalized exploratory well costs pending the determination of proved reserves		132
Reclassifications to wells, facilities and equipment based on the determination of proved reserves		(69	)
Capitalized exploratory well costs charged to expense		(7	)
Dispositions and other		(78	)

Balance at end of period	$	2,237

The preceding table excludes exploratory dry hole costs of $61 million which were incurred and subsequently expensed in 2013. Capitalized exploratory well costs greater than one year old after completion of drilling were $1,996 million at June 30, 2013. Approximately 42% of the capitalized well costs in excess of one year related to Block WA-390-P, offshore Western Australia, where development planning and commercial activities, including negotiations with potential liquefaction partners, are ongoing. Successful negotiation with a third party liquefaction partner is necessary before the Corporation can negotiate a gas sales agreement and sanction development of the project. Approximately 32% related to the Corporation’s Pony discovery on Block 468 in the deepwater Gulf of Mexico. In the third quarter of 2012, the Corporation signed an exchange agreement with partners of the adjacent Green Canyon Block 512, which contains the Knotty Head discovery. Under this agreement covering Blocks 468 and 512, Hess was appointed operator and has a 20% working interest in the blocks, now collectively referred to as Stampede. Field development planning is progressing and the project is targeted for sanction in 2014. Approximately 13% related to Area 54, offshore Libya, where the Corporation is pursuing commercial options. Approximately 8% related to offshore Ghana where the Corporation completed drilling its seventh successful exploration well in February 2013. Appraisal plans for the block were submitted to the Ghanaian government for approval in June 2013 and the Corporation has begun pre-development studies on the block. The remainder of the capitalized well costs in excess of one year related 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: In the second quarter of 2012, the Corporation recorded a charge of $59 million ($36 million after-tax) in the E&P segment to reduce the carrying value of certain exploration properties in the Eagle Ford shale in Texas that were part of an asset exchange with a joint venture partner.

Goodwill

6 Months Ended

Jun. 30, 2013

Goodwill And Intangible Assets Disclosure [Abstract]

Goodwill

7. Goodwill

The changes in the carrying amount of goodwill, all of which relate to the E&P segment, are as follows (in millions):


Balance at January 1, 2013	$	2,208
Dispositions*		(339	)

Balance at June 30, 2013	$	1,869

*	Includes $170 million reclassified to Assets held for sale in the first quarter of 2013.

Debt	6 Months Ended
Debt	Jun. 30, 2013
Debt Disclosure [Abstract]
Debt	8. Debt In the first six months of 2013, the Corporation repaid a net amount of $2,348 million under available credit facilities, which consisted of net repayments of $990 million on its short-term credit facilities, $758 million on the Corporation’s syndicated revolving credit facility and $600 million on its asset-backed credit facility. In addition, the Corporation repaid $92 million of other debt. In the second quarter of 2013, the Corporation recorded a capital lease obligation totaling $98 million in conjunction with its commitment to acquire 50 gasoline stations that were previously held under operating leases. The Corporation repaid $60 million of this obligation on July 2, 2013.

- 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

6 Months Ended

Jun. 30, 2013

Foreign Currency [Abstract]

Foreign Currency

9. Foreign Currency

Pre-tax foreign currency gains (losses) included in Other, net in the Statement of Consolidated Income amounted to the following:


	Three Months Ended June 30,						Six Months Ended June 30,
	2013			2012			2013			2012
	(In millions)
Pre-tax foreign currency gains (losses)	$	(19	)	$	(14	)	$	(50	)	$	7

- Definition

The entire disclosure for foreign currency transactions and translation. This may include description of foreign currency transactions, foreign currency gains and losses, explanation of change in cumulative translation adjustment, description of effect of subsequent foreign currency exchange rate change, cumulative translation adjustment movement, foreign currency translation adjustment by component movement, translation adjustment for net investment hedge movement, adjustment for long-term intercompany transactions, schedule of long-term intercompany balances and any other foreign currency transactions and translation related items.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 830
-SubTopic 20
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6450189&loc=d3e30690-110894

Reference 2: http://www.xbrl.org/2003/role/presentationRef
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Reference 3: http://www.xbrl.org/2003/role/presentationRef
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Reference 5: http://www.xbrl.org/2003/role/presentationRef
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Reference 6: http://www.xbrl.org/2003/role/presentationRef
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Reference 7: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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-SubTopic 20
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-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6450189&loc=d3e30700-110894

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 52
-Paragraph 30, 31, 32
-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

Retirement Plans

6 Months Ended

Jun. 30, 2013

Compensation And Retirement Disclosure [Abstract]

Retirement Plans

10. Retirement Plans

Components of net periodic pension cost consisted of the following:


	Three Months Ended June 30,						Six Months Ended June 30,
	2013			2012			2013			2012
	(In millions)
Service cost	$	17		$	18		$	37		$	36
Interest cost		22			22			44			44
Expected return on plan assets		(36	)		(29	)		(69	)		(58	)
Amortization of net loss		13			21			34			42

Pension expense	$	16		$	32		$	46		$	64

During the first quarter of 2013, the Corporation’s pension and other postretirement plans were impacted by a significant reduction in the expected future service from active participants due to the Corporation’s announced asset sales program. The impact of the resulting curtailment and remeasurement was a reduction of approximately $245 million in the Corporation’s accrued benefit plan liabilities and pre-tax unrecognized actuarial losses recorded in Accumulated other comprehensive income (loss). As a result, the Corporation’s full year 2013 pension expense is now estimated to be approximately $80 million, of which approximately $60 million relates to the amortization of unrecognized net actuarial losses.

In 2013, the Corporation expects to contribute approximately $140 million to its funded pension plans. Through June 30, 2013, the Corporation contributed approximately $70 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 Accounting Standards Codification
-Topic 715
-URI http://asc.fasb.org/topic&trid=2235017

Reference 2: 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 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-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 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 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
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-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 6: 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 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 87
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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
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-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph q
-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 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 10: 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 11: 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 12: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 158
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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 13: http://www.xbrl.org/2003/role/presentationRef
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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 14: http://www.xbrl.org/2003/role/presentationRef
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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.

+ Details

Weighted Average Common Shares

6 Months Ended

Jun. 30, 2013

Earnings Per Share [Abstract]

Weighted Average Common Shares

11. Weighted Average Common Shares

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


	Three Months Ended June 30,					Six Months Ended June 30,
	2013		2012			2013		2012
	(In millions, except per share amounts)
Income from continuing operations, net of income taxes	$	1,589	$	540		$	2,772	$	1,079
Less: Net income attributable to noncontrolling interests		169		3			176		9

Net income from continuing operations attributable to Hess Corporation		1,420		537			2,596		1,070


Income (loss) from discontinued operations, net of income taxes		27		(5	)		117		16
Less: Net income (loss) attributable to noncontrolling interests		16		(17	)		6		(8	)

Net income (loss) from discontinued operations attributable to Hess Corporation		11		12			111		24

Net income attributable to Hess Corporation	$	1,431	$	549		$	2,707	$	1,094


	Three Months Ended June 30,				Six Months Ended June 30,
	2013		2012		2013		2012
	(In millions, except per share amounts)
Weighted average common shares outstanding:
Basic		340.1		338.5		339.6		338.2
Effect of dilutive securities
Restricted common stock		1.1		0.9		1.3		1.0
Stock options		1.9		1.0		1.6		1.2
Performance share units		0.9		—		0.9		—

Diluted		344.0		340.4		343.4		340.4

Net income attributable to Hess Corporation per share:
Basic:
Continuing operations	$	4.18	$	1.58	$	7.64	$	3.17
Discontinued operations		0.03		0.04		0.33		0.07

Net income per share	$	4.21	$	1.62	$	7.97	$	3.24


Diluted:
Continuing operations	$	4.13	$	1.58	$	7.56	$	3.14
Discontinued operations		0.03		0.03		0.32		0.07

Net income per share	$	4.16	$	1.61	$	7.88	$	3.21

The Corporation granted 1,205,569 shares of restricted stock and 279,093 performance share units (PSUs) during the six month period ended June 30, 2013 and 1,525,646 shares of restricted stock and 415,773 PSUs for the same period in 2012. The weighted average common shares used in the diluted earnings per share calculations exclude the effect of 3,793,948 and 5,091,024 out-of-the-money stock options for the three and six months ended June 30, 2013, respectively, as well as 8,144,000 and 7,509,000 out-of-the-money stock options for three and six months ended 2012, respectively, and 408,122 of PSUs for the three and six months ended June 30, 2012.

Segment Information

6 Months Ended

Jun. 30, 2013

Segment Reporting [Abstract]

Segment Information

12. Segment Information

The Corporation is an E&P company that develops, produces, purchases, transports and sells crude oil and natural gas. The Corporation also purchases, markets and trades refined petroleum products, natural gas and electricity through its downstream businesses. In the first quarter of 2013, the Corporation announced plans to divest the downstream businesses, which were previously included in the Marketing and Refining operating segment. Accordingly, the results of operations for the downstream businesses have been classified as discontinued operations. With this change the Corporation now has one operating segment, Exploration and Production, and a Corporate and Other segment, which is primarily comprised of corporate and interest expenses.

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


	Three Months Ended June 30,						Six Months Ended June 30,
	2013			2012			2013			2012
	(In millions)
Operating revenues: Exploration and Production	$	3,011		$	3,324		$	6,477		$	6,220

Net income (loss) attributable to Hess Corporation:
Exploration and Production	$	1,533		$	644		$	2,819		$	1,279
Corporate and Other		(113	)		(107	)		(223	)		(209	)

Income from continuing operations		1,420			537			2,596			1,070
Discontinued operations — Downstream businesses		11			12			111			24

Total	$	1,431		$	549		$	2,707		$	1,094

Identifiable assets by operating segment were as follows:


	June 30, 2013		December 31, 2012
	(In millions)
Exploration and Production	$	35,998	$	37,687
Corporate and Other		937		813
Discontinued operations - Downstream businesses		4,493		4,941

Total	$	41,428	$	43,441

- 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
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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.

+ Details

Risk Management and Trading Activities

6 Months Ended

Jun. 30, 2013

Derivative Instruments And Hedging Activities Disclosure [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 changes in interest rates and foreign currency values. In the disclosures that follow, risk management activities are referred to as corporate and energy marketing 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 as well as foreign currency values. In March 2013, the Corporation announced plans to divest the downstream businesses, which include its energy marketing risk management and trading activities. Accordingly, the results from energy marketing risk management and trading activities have been classified as discontinued operations and the related assets and liabilities reported as held for sale in the Consolidated Balance Sheet.

The Corporation maintains a control environment for all of its risk management and trading activities under the direction of its chief risk officer and through its corporate risk policy, which the Corporation’s senior management has approved. Controls include volumetric, term and value at risk limits. The chief risk officer must approve the trading of new instruments or commodities. Risk limits are monitored and reported on a daily basis to business units and senior management. The Corporation’s risk management department also performs independent price verifications (IPV’s) of sources of fair values, validations of valuation models and analyzes changes in fair value measurements on a daily, monthly and/or quarterly basis. The Corporation’s treasury department is responsible for administering foreign exchange rate and interest rate hedging programs using similar controls and processes, where applicable.

The Corporation’s risk management department, in performing the IPV procedures, utilizes independent sources and valuation models that are specific to the individual contracts and pricing locations to identify positions that require adjustments to better reflect the market. This review is performed quarterly and the results are presented to the chief risk officer and senior management. The IPV process considers the reliability of the pricing services through assessing the number of available quotes, the frequency at which data is available and, where appropriate, the comparability between pricing sources.

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.

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 gross volumes of the Corporate risk management derivative contracts outstanding were as follows:


	June 30, 2013		December 31, 2012
Commodity, primarily crude oil (millions of barrels)		17		1
Foreign exchange (millions of U.S. Dollars)	$	447	$	1,285
Interest rate swaps (millions of U.S. Dollars)	$	865	$	880

In the first quarter of 2013, the Corporation entered into Brent crude oil hedges using fixed-price swap contracts to hedge the variability of forecasted future cash flows from 90,000 barrels of oil per day (bopd) of crude oil sales volumes for the remainder of the calendar year at an average price of approximately $109.70 per barrel. In 2012, the Corporation had entered into Brent crude oil hedges using fixed-price swap contracts to hedge 120,000 bopd of crude oil sales volumes for the full year at an average price of $107.70 per barrel. In 2012, the Corporation also realized hedge losses from previously closed Brent crude oil hedges that covered 24,000 bopd during the year.

Realized gains from E&P hedging activities increased Sales and other operating revenues by $52 million and $34 million for the three and six months ended June 30, 2013, respectively ($33 million and $22 million after-taxes, respectively). Realized losses from E&P hedging activities decreased Sales and other operating revenues by $141 million and $385 million for the three and six months ended June 30, 2012, respectively ($89 million and $240 million after-taxes, respectively). At June 30, 2013, the after-tax deferred gains in Accumulated other comprehensive income (loss) related to Brent crude oil hedges were $63 million, which will be reclassified into earnings during the remainder of 2013 as the hedged crude oil sales are recognized in earnings. The ineffectiveness from Brent crude oil hedges, recognized immediately in Sales and other operating revenues, resulted in gains of $3 million for both the three months ended June 30, 2013 and 2012, and a gain of $18 million and a loss of $8 million for the six months ended June 30, 2013 and 2012, respectively.

At June 30, 2013 and December 31, 2012, the Corporation had interest rate swaps with gross notional amounts of $865 million and $880 million, respectively, which were designated as fair value hedges. Changes in the fair value of interest rate swaps and the hedged fixed-rate debt are recorded in Interest expense in the Statement of Consolidated Income. For the three months ended June 30, 2013 and 2012, the Corporation recorded a decrease of $23 million and an increase of $13 million, respectively and a decrease of $28 million and an increase of $10 million (excluding accrued interest) for the six months ended June 30, 2013 and 2012, respectively, in the fair value of interest rate swaps and a corresponding adjustment in the carrying value of the hedged fixed-rate debt.

Gains or losses on foreign exchange contracts that are not designated as hedges are recognized immediately in Other, net in Revenues and non-operating income in the Statement of Consolidated Income. Net realized and unrealized pre-tax gains and losses on foreign exchange contracts amounted to losses of $7 million and $22 million for the three months ended June 30, 2013 and 2012, respectively and a loss of $40 million and a gain of $4 million for the six months ended June 30, 2013 and 2012, respectively.

Energy Marketing Risk Management 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 gross volumes of the Corporation’s energy marketing commodity contracts outstanding were as follows:


	June 30, 2013		December 31, 2012
Crude oil and refined petroleum products (millions of barrels)		20		26
Natural gas (millions of mcf*)		3,028		2,938
Electricity (millions of megawatt hours)		243		278

*	One mcf represents one thousand cubic feet.

The changes in fair value of certain energy marketing commodity contracts that are not designated as hedges, as well as revenues from the sales contracts, supply contract purchases and net settlements from financial derivatives related to these energy marketing activities, are recognized currently in Income (loss) from discontinued operations in the Statement of Consolidated Income. Net realized and unrealized pre-tax gains and losses on derivative contracts not designated as hedges amounted to gains of $44 million and $24 million for the three months ended June 30, 2013 and 2012, respectively and $76 million and $79 million for the six months ended June 30, 2013 and 2012, respectively.

At June 30, 2013, a portion of energy marketing commodity contracts was designated as cash flow hedges to hedge variability of expected future cash flows of forecasted supply transactions. The Corporation recorded the effective portion of changes in the fair value of cash flow hedges as a component of Accumulated other comprehensive income (loss) in the Consolidated Balance Sheet and then reclassified amounts to Income (loss) from discontinued operations in the Statement of Consolidated Income as the hedged transactions are recognized in earnings. After-tax deferred losses relating to energy marketing activities recorded in Accumulated other comprehensive income (loss) were $9 million at June 30, 2013 and $22 million at December 31, 2012. All energy marketing cash flow hedges outstanding as of June 30, 2013 are expected to be reclassified into Income (loss) from discontinued operations over the next twelve months.

Trading Activities: Trading activities are conducted principally through a trading partnership in which the Corporation has a 50% voting interest. This consolidated entity operates 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 gross volumes of derivative contracts outstanding relating to trading activities were as follows:


	June 30, 2013		December 31, 2012
Commodity
Crude oil and refined petroleum products (millions of barrels)		1,649		1,179
Natural gas (millions of mcf)		3,748		3,377
Electricity (millions of megawatt hours)		8		19
Foreign exchange (millions of U.S. Dollars)	$	117	$	412
Other
Interest rate (millions of U.S. Dollars)	$	99	$	167
Equity securities (millions of shares)		16		14

Pre-tax unrealized and realized gains (losses) recorded in Income (loss) from discontinued operations in the Statement of Consolidated Income from trading activities amounted to the following:


	Three Months Ended June 30,					Six Months Ended June 30,
	2013		2012			2013		2012
	(In millions)
Commodity	$	54	$	(25	)	$	47	$	8
Foreign exchange		1		2			1		2
Other		2		(2	)		8		(1	)

Total	$	57	$	(25	)	$	56	$	9

Fair Value Measurements: The Corporation generally enters into master netting arrangements to mitigate legal and counterparty credit risk. Master netting arrangements are generally accepted overarching master contracts that govern all individual transactions with the same counterparty entity as a single legally enforceable agreement. The United States Bankruptcy Code provides for the enforcement of certain termination and netting rights under certain types of contracts upon the bankruptcy filing of a counterparty, commonly known as the “safe harbor” provisions. If a master netting arrangement provides for termination and netting upon the counterparty’s bankruptcy, these rights are generally enforceable with respect to “safe harbor” transactions. If these arrangements provide the right of offset and the Corporation’s intent and practice is to offset amounts in the case of such a termination, the Corporation’s policy is to record the fair value of derivative assets and liabilities on a net basis.

In the normal course of business the Corporation relies on legal and credit risk mitigation clauses providing for adequate credit assurance as well as close-out netting, including two-party netting and single counterparty multilateral netting. As applied to the Corporation, “two-party netting” is the right to net amounts owing under safe harbor transactions between a single defaulting counterparty entity and a single Hess entity, and “single counterparty multilateral netting” is the right to net amounts owing under safe harbor transactions among a single defaulting counterparty entity and multiple Hess entities. The Corporation is reasonably assured that these netting rights would be upheld in a bankruptcy proceeding in the United States in which the defaulting counterparty is a debtor under the United States Bankruptcy Code.

The following table provides information about the effect of netting arrangements on the presentation of the Corporation’s physical and financial derivative assets and (liabilities) that are measured at fair value, with the effect of single counterparty multilateral netting being included in column (iv):


				Gross Amounts Offset in the Consolidated Balance Sheet						Net Amounts			Gross Amounts
	Gross Amounts			Physical Derivative and Financial Instruments			Cash Collateral*			Presented in the Consolidated Balance Sheet			Not Offset in the Consolidated Balance Sheet			Net Amount
	(i)			(ii)			(ii)			(iii) = (i) + (ii)			(iv)			(v) = (iii) + (iv)
	(In millions)
June 30, 2013
Assets
Derivative contracts
Commodity	$	3,600		$	(2,673	)	$	(21	)	$	906		$	(29	)	$	877
Interest rate and other		60			(8	)		—			52			(16	)		36
Counterparty netting		—			(105	)		—			(105	)		—			(105	)

Total derivative contracts	$	3,660		$	(2,786	)	$	(21	)	$	853		$	(45	)	$	808


Liabilities
Derivative contracts
Commodity	$	(3,484	)	$	2,673		$	141		$	(670	)	$	29		$	(641	)
Other		(21	)		8			—			(13	)		16			3
Counterparty netting		—			105			—			105			—			105

Total derivative contracts	$	(3,505	)	$	2,786		$	141		$	(578	)	$	45		$	(533	)


December 31, 2012
Assets
Derivative contracts
Commodity	$	3,253		$	(2,661	)	$	(34	)	$	558		$	(45	)	$	513
Interest rate and other		100			(8	)		—			92			(6	)		86
Counterparty netting		—			(81	)		—			(81	)		—			(81	)

Total derivative contracts	$	3,353		$	(2,750	)	$	(34	)	$	569		$	(51	)	$	518


				Gross Amounts Offset in the Consolidated Balance Sheet				Net Amounts			Gross Amounts
	Gross Amounts			Physical Derivative and Financial Instruments		Cash Collateral*		Presented in the Consolidated Balance Sheet			Not Offset in the Consolidated Balance Sheet		Net Amount
	(i)			(ii)		(ii)		(iii) = (i) + (ii)			(iv)		(v) = (iii) + (iv)
	(In millions)
December 31, 2012
Liabilities
Derivative contracts
Commodity	$	(3,312	)	$	2,661	$	5	$	(646	)	$	45	$	(601	)
Other		(10	)		8		—		(2	)		6		4
Counterparty netting		—			81		—		81			—		81

Total derivative contracts	$	(3,322	)	$	2,750	$	5	$	(567	)	$	51	$	(516	)

*	There is no cash collateral that was not offset in the Consolidated Balance Sheet.

Included in net assets and liabilities that were offset in the Consolidated Balance Sheet as reflected in column (iii) of the table above were the assets and liabilities related to the Corporation’s discontinued operations in the amounts of $659 million and $567 million as of June 30, 2013, respectively ($483 million and $565 million as of December 31, 2012). The amounts at June 30, 2013 were classified as held for sale in the Consolidated Balance Sheet. The remainder of net assets and liabilities that were offset in the Consolidated Balance Sheet as reflected in column (iii) of the table above, related to the Corporation’s continuing operations and were included in Accounts receivable — Trade and Accounts payable, respectively.

The table below reflects the gross and net fair values of the corporate and energy marketing risk management and trading derivative instruments:


	Accounts Receivable			Accounts Payable
	(In millions)
June 30, 2013
Derivative contracts designated as hedging instruments
Commodity	$	159		$	(18	)
Interest rate and other		45			(2	)

Total derivative contracts designated as hedging instruments		204			(20	)


Derivative contracts not designated as hedging instruments*
Commodity		3,441			(3,466	)
Foreign exchange		1			(10	)
Other		14			(9	)

Total derivative contracts not designated as hedging instruments		3,456			(3,485	)


Gross fair value of derivative contracts		3,660			(3,505	)
Master netting arrangements		(2,786	)		2,786
Cash collateral (received) posted		(21	)		141

Net fair value of derivative contracts	$	853		$	(578	)

*	Includes trading derivatives and derivatives used for risk management.


	Accounts Receivable			Accounts Payable
	(In millions)
December 31, 2012
Derivative contracts designated as hedging instruments
Commodity	$	65		$	(124	)
Interest rate and other		72			(2	)

Total derivative contracts designated as hedging instruments		137			(126	)


Derivative contracts not designated as hedging instruments*
Commodity		3,188			(3,188	)
Foreign exchange		14			—
Other		14			(8	)

Total derivative contracts not designated as hedging instruments		3,216			(3,196	)


Gross fair value of derivative contracts		3,353			(3,322	)
Master netting arrangements		(2,750	)		2,750
Cash collateral (received) posted		(34	)		5

Net fair value of derivative contracts	$	569		$	(567	)

*	Includes trading derivatives and derivatives used for risk management.

The Corporation determines fair value in accordance with the fair value measurements accounting standard (Accounting Standards Codification 820 — Fair Value Measurements and Disclosures), which established a hierarchy that categorizes the sources of inputs, which generally range from quoted prices for identical instruments in a principal trading market (Level 1) to estimates determined using related market data (Level 3). Measurements derived indirectly from observable inputs or from quoted prices from markets that are less liquid are considered Level 2.

When Level 1 inputs are available within a particular market, those inputs are selected for determination of fair value over Level 2 or 3 inputs in the same market. To value derivatives that are characterized as Level 2 and 3, the Corporation uses observable inputs for similar instruments that are available from exchanges, pricing services or broker quotes. These observable inputs may be supplemented with other methods, including internal extrapolation or interpolation, that result in the most representative prices for instruments with similar characteristics. Multiple inputs may be used to measure fair value, however, the level of fair value for each physical derivative and financial asset or liability presented below is based on the lowest significant input level within this fair value hierarchy.

The following table provides the Corporation’s net physical derivative and financial assets and (liabilities) that are measured at fair value based on this hierarchy:


										Counterparty
	Level 1			Level 2			Level 3			netting			Collateral			Balance
	(In millions)
June 30, 2013
Assets
Derivative contracts
Commodity	$	61		$	753		$	161		$	(48	)	$	(21	)	$	906
Interest rate and other		6			45			1			—			—			52
Collateral and counterparty netting		(3	)		(101	)		(1	)		—			—			(105	)

Total derivative contracts		64			697			161			(48	)		(21	)		853
Other assets measured at fair value on a recurring basis		1			—			—			—			—			1

Total assets measured at fair value on a recurring basis	$	65		$	697		$	161		$	(48	)	$	(21	)	$	854	(a)


Liabilities
Derivative contracts
Commodity	$	(234	)	$	(570	)	$	(55	)	$	48		$	141		$	(670	)
Other		(2	)		(11	)		—			—			—			(13	)
Collateral and counterparty netting		3			101			1			—			—			105

Total derivative contracts		(233	)		(480	)		(54	)		48			141			(578	)
Other liabilities measured at fair value on a recurring basis		(17	)		—			—			—			—			(17	)

Total liabilities measured at fair value on a recurring basis	$	(250	)	$	(480	)	$	(54	)	$	48		$	141		$	(595	)(b)

Other fair value measurement disclosures Long-term debt	$	—		$	(6,692	)	$	—		$	—		$	—		$	(6,692	)

(a)

Includes a total of $1 million of Commodity Level 1 assets and $193 million of Commodity and Interest rate and other Level 2 assets that relate to corporate risk management activities.

(b)

Includes $11 million of Other Level 2 liabilities that relate to corporate risk management activities.


										Counterparty
	Level 1			Level 2			Level 3			netting			Collateral			Balance
	(In millions)
December 31, 2012
Assets
Derivative contracts
Commodity	$	94		$	445		$	243		$	(190	)	$	(34	)	$	558
Interest rate and other		6			86			1			(1	)		—			92
Collateral and counterparty netting		(23	)		(54	)		(4	)		—			—			(81	)

Total derivative contracts		77			477			240			(191	)		(34	)		569
Other assets measured at fair value on a recurring basis		5			49			—			(2	)		—			52

Total assets measured at fair value on a recurring basis	$	82		$	526		$	240		$	(193	)	$	(34	)	$	621


Liabilities
Derivative contracts
Commodity	$	(83	)	$	(657	)	$	(101	)	$	190		$	5		$	(646	)
Other		(1	)		(2	)		—			1			—			(2	)
Collateral and counterparty netting		23			54			4			—			—			81

Total derivative contracts		(61	)		(605	)		(97	)		191			5			(567	)
Other liabilities measured at fair value on a recurring basis		(40	)		(2	)		(2	)		2			—			(42	)

Total liabilities measured at fair value on a recurring basis	$	(101	)	$	(607	)	$	(99	)	$	193		$	5		$	(609	)

Other fair value measurement disclosures Long-term debt	$	—		$	(8,887	)	$	—		$	—		$	—		$	(8,887	)


The following table provides net transfers into and out of each level of the fair value hierarchy:
							Three Months Ended June 30,						Six Months Ended June 30,
							2013			2012			2013			2012
							(In millions)
Transfers into Level 1							$	(18	)	$	155		$	(19	)	$	159
Transfers out of Level 1								62			257			62			248

							$	44		$	412		$	43		$	407


Transfers into Level 2							$	(92	)	$	(342	)	$	(92	)	$	(293	)
Transfers out of Level 2								19			(138	)		18			(157	)

							$	(73	)	$	(480	)	$	(74	)	$	(450	)


Transfers into Level 3							$	—		$	23		$	2		$	50
Transfers out of Level 3								29			45			29			(7	)

							$	29		$	68		$	31		$	43

The Corporation’s policy is to recognize transfers in and transfers out as of the end of the reporting period. Transfers between levels result from the passage of time as contracts move closer to their maturities, fluctuations in the market liquidity for certain contracts and/or changes in the level of significance of fair value measurement inputs.

The following table provides changes in physical derivatives and financial assets and (liabilities) that are measured at fair value based on Level 3 inputs, which are all related to discontinued operations:


	Three Months Ended June 30,						Six Months Ended June 30,
	2013			2012			2013			2012
	(In millions)
Balance at beginning of period	$	70		$	(268	)	$	141		$	(143	)
Unrealized pre-tax gains (losses) (a)		2			120			(61	)		(3	)
Purchases (b)		12			10			40			230
Sales (b)		(8	)		(23	)		(31	)		(257	)
Settlements (c)		2			180			(13	)		217
Transfers into Level 3		—			23			2			50
Transfers out of Level 3		29			45			29			(7	)

Balance at end of period	$	107		$	87		$	107		$	87

(a)

Includes unrealized pre-tax gains of $43 million recorded in Other comprehensive income for the three and six months ended June 30, 2012. The remainder of the unrealized pre-tax gains (losses) were recorded in Income (loss) from discontinued operations in the Statement of Consolidated Income.

(b)

Purchases and sales primarily represent option premiums paid or received, respectively, during the reporting period and are reflected in Income (loss) from discontinued operations in the Statement of Consolidated Income.

(c)

Settlements represent realized gains and losses on derivatives settled during the reporting period and are reflected in Income (loss) from discontinued operations in the Statement of Consolidated Income.

The significant unobservable inputs used in Level 3 fair value measurements for the Corporation’s physical commodity contracts and derivative instruments primarily include less liquid delivered locations for physical commodity contracts or volatility assumptions for out-of-the-money options. The following table provides information about the Corporation’s significant recurring unobservable inputs used in the Level 3 fair value measurements. Natural gas contracts are usually quoted and transacted using basis pricing relative to an active pricing location (e.g., Henry Hub), for which price inputs represent the approximate value of differences in geography and local market conditions. All other price inputs below represent full contract prices. Significant changes in any of the inputs below, independently or correlated, may result in a different fair value.


	Unit of	Range /
	Measurement	Weighted Average
June 30, 2013
Assets
Commodity contracts with a fair value of $161 million (a)
Contract prices
Crude oil and refined petroleum products	$ / bbl (c)	$ 85.41 - 115.59 / 111.66
Electricity	$ / MWH (d)	$ 24.87 - 86.36 / 47.26

Basis prices
Natural gas	$ / MMBTU (e)	$ (1.10) - 6.39 / 0.10

Contract volatilities
Crude oil and refined petroleum products	%	16.00 - 21.00 / 17.00
Natural gas	%	19.00 - 32.00 / 22.00
Electricity	%	16.00 - 38.00 / 24.00


	Unit of Measurement		Range / Weighted Average
June 30, 2013
Liabilities
Commodity contracts with a fair value of $55 million (b) Contract prices
Crude oil and refined petroleum products		$ / bbl (c)	$ 92.86 - 116.04 / 112.67
Electricity		$ / MWH (d)	$ 29.24 - 82.45 / 46.73

Basis prices
Natural gas		$ / MMBTU (e)	$ (1.10) - 6.39 / 0.06

Contract volatilities
Crude oil and refined petroleum products		%	16.00 - 21.00 / 17.00
Natural gas		%	19.50 - 29.00 / 20.00


December 31, 2012
Assets
Commodity contracts with a fair value of $243 million Contract prices
Crude oil and refined petroleum products		$ / bbl (c)	$ 79.35 - 144.27 / 113.06
Electricity		$ / MWH (d)	$ 23.37 - 79.27 / 40.81

Basis prices
Natural gas		$ / MMBTU (e)	$ (0.47) - 6.66 / 0.39

Contract volatilities
Crude oil and refined petroleum products		%	23.00 - 27.00 / 26.00
Natural gas		%	21.00 - 36.00 / 25.00
Electricity		%	18.00 - 40.00 / 28.00


Liabilities
Commodity contracts with a fair value of $101 million Contract prices
Crude oil and refined petroleum products		$ / bbl (c)	$ 83.49 - 133.38 / 109.94
Electricity		$ / MWH (d)	$ 25.01 - 72.60 / 40.38

Basis prices
Natural gas		$ / MMBTU (e)	$ (0.72) - 6.66 /1.26

Contract volatilities
Crude oil and refined petroleum products		%	24.00 - 27.00 / 26.00
Natural gas		%	21.00 - 28.00 / 22.00

(a)

Included in Assets held for sale.

(b)

Included in Liabilities associated with assets held for sale.

(c)

Price per barrel.

(d)

Price per megawatt hour.

(e)

Price per million British thermal unit.

Note:

Fair value measurement for all recurring inputs was performed using a combination of income and market approach techniques.

Credit Risk: The Corporation is exposed to credit risks that may at times be concentrated with certain counterparties, groups of counterparties or customers. Accounts receivable are generated from a diverse domestic and international customer base. The Corporation’s net Accounts receivable — Trade at June 30, 2013 are concentrated with the following counterparty and customer industry segments: Integrated Oil Companies — 48%, Financial Institutions — 23%, Refiners — 16% and Government Entities — 10%. As of December 31, 2012, the Corporation’s net Accounts receivable were concentrated as follows: Integrated Oil Companies — 23%, Refiners — 15%, Government Entities — 11%, Real Estate — 8%, Services — 8% and Manufacturing — 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 June 30, 2013 and December 31, 2012, the Corporation held cash from counterparties of $21 million and $34 million, respectively. The Corporation posted cash to counterparties at June 30, 2013 and December 31, 2012, of $141 million and $5 million, respectively.

At June 30, 2013, the Corporation had outstanding letters of credit totaling $593 million ($746 million at December 31, 2012), primarily issued to satisfy margin requirements (approximately $470 million related to discontinued operations at June 30, 2013). 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 June 30, 2013, the net liability related to both realized and unrealized derivative contracts with contingent collateral provisions was approximately $212 million, primarily related to discontinued operations ($435 million at December 31, 2012). There was no cash collateral posted on those derivatives at June 30, 2013 or December 31, 2012. At June 30, 2013 and at December 31, 2012, 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 June 30, 2013, the Corporation would be required to post additional collateral of approximately $145 million ($275 million at December 31, 2012).

Subsequent Event	6 Months Ended
Subsequent Event	Jun. 30, 2013
Subsequent Events [Abstract]
Subsequent Event	14. Subsequent Event In July 2013, the Corporation announced an agreement to sell its energy marketing business for $1,025 million before normal post-closing adjustments. The transaction is subject to regulatory approvals and other customary closing conditions and is expected to close in the fourth quarter of 2013.

Basis of Presentation (Policies)	6 Months Ended
Basis of Presentation (Policies)	Jun. 30, 2013
Accounting Policies [Abstract]
Recently adopted accounting pronouncements	*Recently adopted accounting pronouncements:* Effective January 1, 2013, the Corporation adopted ASU 2013-02, Comprehensive Income (Topic 220): Reporting of Amounts Reclassified Out of Accumulated Other Comprehensive Income (AOCI) which requires aggregated disclosures of amounts reclassified out of AOCI as well as a presentation of changes in AOCI balances by component. The changes in AOCI by component, including amounts reclassified out of AOCI in their entirety are presented in the Statement of Consolidated Comprehensive Income. Effective January 1, 2013, the Corporation adopted ASU 2011-11, Balance Sheet (Topic 210): Disclosures about Offsetting Assets and Liabilities which requires disclosure of information needed to evaluate the effects or potential effects of the contractual right of setoff for assets and liabilities. This accounting standard update applies to assets and liabilities related to financial instruments and derivatives subject to an enforceable master netting arrangement or similar agreement. The required disclosures are presented in Note 13, Risk Management and Trading Activities.

Discontinued Operations - Downstream Businesses (Tables)

6 Months Ended

Jun. 30, 2013

Discontinued Operations And Disposal Groups [Abstract]

Summary of Sales and Other Operating Revenues and Income (Loss) from Discontinued Operations

Sales and other operating revenues and Income (loss) from discontinued operations for the downstream businesses were as follows:


	Three Months Ended June 30,					Six Months Ended June 30,
	2013		2012			2013		2012
	(In millions)
Sales and other operating revenues	$	5,652	$	5,991		$	13,065	$	12,791

Income (loss) from discontinued operations before income taxes	$	31	$	(6	)	$	175	$	24
Provision (benefit) for income taxes		4		(1	)		58		8

Income (loss) from discontinued operations, net of income taxes		27		(5	)		117		16
Less: Net income (loss) attributable to noncontrolling interests		16		(17	)		6		(8	)

Net income (loss) from discontinued operations attributable to Hess Corporation	$	11	$	12		$	111	$	24

Summary of Assets and Liabilities of Discontinued Downstream Businesses

The following table presents the assets and liabilities of the discontinued downstream businesses that are classified as held for sale (in millions):


	June 30, 2013
Accounts receivable	$	2,138
Inventories		605
Investment in affiliates		177
Property, plant and equipment, net		1,221
Other assets		156

Total assets	$	4,297

Accounts payable and accrued liabilities	$	2,122
Other liabilities and deferred credits		130

Total liabilities	$	2,252

Exit and Disposal Costs (Tables)

6 Months Ended

Jun. 30, 2013

Restructuring And Related Activities [Abstract]

Components of and Changes in Restructuring Accruals

The following table provides the components of and changes in the Corporation’s restructuring accruals:


	E&P			Corporate and Other		Downstream Businesses			Total
	(In millions)
Employee Severance
Balance at January 1, 2013	$	—		$	—	$	—		$	—
Provision		83			19		89			191	(a)
Payments		(8	)		—		(2	)		(10	)

Balance at June 30, 2013		75			19		87			181

Facility and Other Exit Costs
Balance at January 1, 2013		—			—		—			—
Provision		9	(b)		—		35	(c)		44
Payments		(9	)		—		(22	)		(31	)

Balance at June 30, 2013		—			—		13			13

Total restructuring accruals at June 30, 2013	$	75		$	19	$	100		$	194

(a)

(b)

Included in General and administrative expenses.

(c)

Included in Income (loss) from discontinued operations.

Inventories (Tables)

6 Months Ended

Jun. 30, 2013

Inventory Disclosure [Abstract]

Inventories

Inventories consisted of the following:


	June 30, 2013		December 31, 2012
	(In millions)
Crude oil and other charge stocks	$	293	$	493
Refined petroleum products and natural gas		—		1,362
Less: LIFO		—		(1,123	)

		293		732
Merchandise, materials and supplies		390		527

Total inventories	$	683	$	1,259

Property, Plant and Equipment (Tables)

6 Months Ended

Jun. 30, 2013

Text Block [Abstract]

Net Changes in Capitalized Exploratory Well Costs


Balance at January 1	$	2,259
Additions to capitalized exploratory well costs pending the determination of proved reserves		132
Reclassifications to wells, facilities and equipment based on the determination of proved reserves		(69	)
Capitalized exploratory well costs charged to expense		(7	)
Dispositions and other		(78	)

Balance at end of period	$	2,237

- 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

Goodwill (Tables)

6 Months Ended

Jun. 30, 2013

Goodwill And Intangible Assets Disclosure [Abstract]

Changes in Carrying Amount of Goodwill

The changes in the carrying amount of goodwill, all of which relate to the E&P segment, are as follows (in millions):


Balance at January 1, 2013	$	2,208
Dispositions*		(339	)

Balance at June 30, 2013	$	1,869

*	Includes $170 million reclassified to Assets held for sale in the first quarter of 2013.

- Definition

Tabular disclosure of goodwill by reportable segment and in total which includes a rollforward schedule.

+ References + Details

Foreign Currency (Tables)

6 Months Ended

Jun. 30, 2013

Foreign Currency [Abstract]

Pre-Tax Foreign Currency Gains (Losses)

Pre-tax foreign currency gains (losses) included in Other, net in the Statement of Consolidated Income amounted to the following:


	Three Months Ended June 30,						Six Months Ended June 30,
	2013			2012			2013			2012
	(In millions)
Pre-tax foreign currency gains (losses)	$	(19	)	$	(14	)	$	(50	)	$	7

Retirement Plans (Tables)

6 Months Ended

Jun. 30, 2013

Compensation And Retirement Disclosure [Abstract]

Components of Net Periodic Pension Cost

Components of net periodic pension cost consisted of the following:


	Three Months Ended June 30,						Six Months Ended June 30,
	2013			2012			2013			2012
	(In millions)
Service cost	$	17		$	18		$	37		$	36
Interest cost		22			22			44			44
Expected return on plan assets		(36	)		(29	)		(69	)		(58	)
Amortization of net loss		13			21			34			42

Pension expense	$	16		$	32		$	46		$	64

- Definition

Tabular disclosure of one or more of the entity's defined benefit pension plans or one or more other defined benefit postretirement plans, separately for pension plans and other postretirement benefit plans including the entity's schedule of fair value of plan assets for defined benefit or other postretirement plans.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=21915506&loc=d3e2439-114920

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=21915506&loc=d3e2417-114920

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=21915506&loc=d3e2410-114920

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=21915506&loc=d3e1928-114920

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 55
-Paragraph 17
-URI http://asc.fasb.org/extlink&oid=21916443&loc=d3e4179-114921

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 158
-Paragraph 4, 7, 16, 20, 21
-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)
-Number 132R
-Paragraph 5, 6, 7
-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 Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-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.

+ Details

Weighted Average Common Shares (Tables)

6 Months Ended

Jun. 30, 2013

Earnings Per Share [Abstract]

Net Income and Weighted Average Number of Common Shares Used in Basic and Diluted Earnings Per Share Computations

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


	Three Months Ended June 30,					Six Months Ended June 30,
	2013		2012			2013		2012
	(In millions, except per share amounts)
Income from continuing operations, net of income taxes	$	1,589	$	540		$	2,772	$	1,079
Less: Net income attributable to noncontrolling interests		169		3			176		9

Net income from continuing operations attributable to Hess Corporation		1,420		537			2,596		1,070


Income (loss) from discontinued operations, net of income taxes		27		(5	)		117		16
Less: Net income (loss) attributable to noncontrolling interests		16		(17	)		6		(8	)

Net income (loss) from discontinued operations attributable to Hess Corporation		11		12			111		24

Net income attributable to Hess Corporation	$	1,431	$	549		$	2,707	$	1,094


	Three Months Ended June 30,				Six Months Ended June 30,
	2013		2012		2013		2012
	(In millions, except per share amounts)
Weighted average common shares outstanding:
Basic		340.1		338.5		339.6		338.2
Effect of dilutive securities
Restricted common stock		1.1		0.9		1.3		1.0
Stock options		1.9		1.0		1.6		1.2
Performance share units		0.9		—		0.9		—

Diluted		344.0		340.4		343.4		340.4

Net income attributable to Hess Corporation per share:
Basic:
Continuing operations	$	4.18	$	1.58	$	7.64	$	3.17
Discontinued operations		0.03		0.04		0.33		0.07

Net income per share	$	4.21	$	1.62	$	7.97	$	3.24


Diluted:
Continuing operations	$	4.13	$	1.58	$	7.56	$	3.14
Discontinued operations		0.03		0.03		0.32		0.07

Net income per share	$	4.16	$	1.61	$	7.88	$	3.21

Segment Information (Tables)

6 Months Ended

Jun. 30, 2013

Segment Reporting [Abstract]

Corporation's Results by Operating Segment

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


	Three Months Ended June 30,						Six Months Ended June 30,
	2013			2012			2013			2012
	(In millions)
Operating revenues: Exploration and Production	$	3,011		$	3,324		$	6,477		$	6,220

Net income (loss) attributable to Hess Corporation:
Exploration and Production	$	1,533		$	644		$	2,819		$	1,279
Corporate and Other		(113	)		(107	)		(223	)		(209	)

Income from continuing operations		1,420			537			2,596			1,070
Discontinued operations — Downstream businesses		11			12			111			24

Total	$	1,431		$	549		$	2,707		$	1,094

Identifiable Assets by Operating Segment

Identifiable assets by operating segment were as follows:


	June 30, 2013		December 31, 2012
	(In millions)
Exploration and Production	$	35,998	$	37,687
Corporate and Other		937		813
Discontinued operations - Downstream businesses		4,493		4,941

Total	$	41,428	$	43,441

- Definition

Tabular disclosure of the profit or loss and total assets for each reportable segment. An entity discloses certain information on each reportable segment if the amounts (a) are included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) are otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss.

+ References + Details

Risk Management and Trading Activities (Tables)

6 Months Ended

Jun. 30, 2013

Pre-Tax Gains (Losses) from Trading Activities

Pre-tax unrealized and realized gains (losses) recorded in Income (loss) from discontinued operations in the Statement of Consolidated Income from trading activities amounted to the following:


	Three Months Ended June 30,					Six Months Ended June 30,
	2013		2012			2013		2012
	(In millions)
Commodity	$	54	$	(25	)	$	47	$	8
Foreign exchange		1		2			1		2
Other		2		(2	)		8		(1	)

Total	$	57	$	(25	)	$	56	$	9

Netting Arrangements on Physical and Financial Derivative Assets and Liabilities


				Gross Amounts Offset in the Consolidated Balance Sheet						Net Amounts			Gross Amounts
	Gross Amounts			Physical Derivative and Financial Instruments			Cash Collateral*			Presented in the Consolidated Balance Sheet			Not Offset in the Consolidated Balance Sheet			Net Amount
	(i)			(ii)			(ii)			(iii) = (i) + (ii)			(iv)			(v) = (iii) + (iv)
	(In millions)
June 30, 2013
Assets
Derivative contracts
Commodity	$	3,600		$	(2,673	)	$	(21	)	$	906		$	(29	)	$	877
Interest rate and other		60			(8	)		—			52			(16	)		36
Counterparty netting		—			(105	)		—			(105	)		—			(105	)

Total derivative contracts	$	3,660		$	(2,786	)	$	(21	)	$	853		$	(45	)	$	808


Liabilities
Derivative contracts
Commodity	$	(3,484	)	$	2,673		$	141		$	(670	)	$	29		$	(641	)
Other		(21	)		8			—			(13	)		16			3
Counterparty netting		—			105			—			105			—			105

Total derivative contracts	$	(3,505	)	$	2,786		$	141		$	(578	)	$	45		$	(533	)


December 31, 2012
Assets
Derivative contracts
Commodity	$	3,253		$	(2,661	)	$	(34	)	$	558		$	(45	)	$	513
Interest rate and other		100			(8	)		—			92			(6	)		86
Counterparty netting		—			(81	)		—			(81	)		—			(81	)

Total derivative contracts	$	3,353		$	(2,750	)	$	(34	)	$	569		$	(51	)	$	518


				Gross Amounts Offset in the Consolidated Balance Sheet				Net Amounts			Gross Amounts
	Gross Amounts			Physical Derivative and Financial Instruments		Cash Collateral*		Presented in the Consolidated Balance Sheet			Not Offset in the Consolidated Balance Sheet		Net Amount
	(i)			(ii)		(ii)		(iii) = (i) + (ii)			(iv)		(v) = (iii) + (iv)
	(In millions)
December 31, 2012
Liabilities
Derivative contracts
Commodity	$	(3,312	)	$	2,661	$	5	$	(646	)	$	45	$	(601	)
Other		(10	)		8		—		(2	)		6		4
Counterparty netting		—			81		—		81			—		81

Total derivative contracts	$	(3,322	)	$	2,750	$	5	$	(567	)	$	51	$	(516	)

*	There is no cash collateral that was not offset in the Consolidated Balance Sheet.

Gross and Net Fair Values of Corporate and Energy Marketing Risk Management and Trading Derivative Instruments

The table below reflects the gross and net fair values of the corporate and energy marketing risk management and trading derivative instruments:


	Accounts Receivable			Accounts Payable
	(In millions)
June 30, 2013
Derivative contracts designated as hedging instruments
Commodity	$	159		$	(18	)
Interest rate and other		45			(2	)

Total derivative contracts designated as hedging instruments		204			(20	)


Derivative contracts not designated as hedging instruments*
Commodity		3,441			(3,466	)
Foreign exchange		1			(10	)
Other		14			(9	)

Total derivative contracts not designated as hedging instruments		3,456			(3,485	)


Gross fair value of derivative contracts		3,660			(3,505	)
Master netting arrangements		(2,786	)		2,786
Cash collateral (received) posted		(21	)		141

Net fair value of derivative contracts	$	853		$	(578	)

*	Includes trading derivatives and derivatives used for risk management.


	Accounts Receivable			Accounts Payable
	(In millions)
December 31, 2012
Derivative contracts designated as hedging instruments
Commodity	$	65		$	(124	)
Interest rate and other		72			(2	)

Total derivative contracts designated as hedging instruments		137			(126	)


Derivative contracts not designated as hedging instruments*
Commodity		3,188			(3,188	)
Foreign exchange		14			—
Other		14			(8	)

Total derivative contracts not designated as hedging instruments		3,216			(3,196	)


Gross fair value of derivative contracts		3,353			(3,322	)
Master netting arrangements		(2,750	)		2,750
Cash collateral (received) posted		(34	)		5

Net fair value of derivative contracts	$	569		$	(567	)

*	Includes trading derivatives and derivatives used for risk management.

Fair Values for Corporation's Net Physical Derivative and Financial Assets and Liabilities

The following table provides the Corporation’s net physical derivative and financial assets and (liabilities) that are measured at fair value based on this hierarchy:


										Counterparty
	Level 1			Level 2			Level 3			netting			Collateral			Balance
	(In millions)
June 30, 2013
Assets
Derivative contracts
Commodity	$	61		$	753		$	161		$	(48	)	$	(21	)	$	906
Interest rate and other		6			45			1			—			—			52
Collateral and counterparty netting		(3	)		(101	)		(1	)		—			—			(105	)

Total derivative contracts		64			697			161			(48	)		(21	)		853
Other assets measured at fair value on a recurring basis		1			—			—			—			—			1

Total assets measured at fair value on a recurring basis	$	65		$	697		$	161		$	(48	)	$	(21	)	$	854	(a)


Liabilities
Derivative contracts
Commodity	$	(234	)	$	(570	)	$	(55	)	$	48		$	141		$	(670	)
Other		(2	)		(11	)		—			—			—			(13	)
Collateral and counterparty netting		3			101			1			—			—			105

Total derivative contracts		(233	)		(480	)		(54	)		48			141			(578	)
Other liabilities measured at fair value on a recurring basis		(17	)		—			—			—			—			(17	)

Total liabilities measured at fair value on a recurring basis	$	(250	)	$	(480	)	$	(54	)	$	48		$	141		$	(595	)(b)

Other fair value measurement disclosures Long-term debt	$	—		$	(6,692	)	$	—		$	—		$	—		$	(6,692	)

(a)

Includes a total of $1 million of Commodity Level 1 assets and $193 million of Commodity and Interest rate and other Level 2 assets that relate to corporate risk management activities.

(b)

Includes $11 million of Other Level 2 liabilities that relate to corporate risk management activities.


										Counterparty
	Level 1			Level 2			Level 3			netting			Collateral			Balance
	(In millions)
December 31, 2012
Assets
Derivative contracts
Commodity	$	94		$	445		$	243		$	(190	)	$	(34	)	$	558
Interest rate and other		6			86			1			(1	)		—			92
Collateral and counterparty netting		(23	)		(54	)		(4	)		—			—			(81	)

Total derivative contracts		77			477			240			(191	)		(34	)		569
Other assets measured at fair value on a recurring basis		5			49			—			(2	)		—			52

Total assets measured at fair value on a recurring basis	$	82		$	526		$	240		$	(193	)	$	(34	)	$	621


Liabilities
Derivative contracts
Commodity	$	(83	)	$	(657	)	$	(101	)	$	190		$	5		$	(646	)
Other		(1	)		(2	)		—			1			—			(2	)
Collateral and counterparty netting		23			54			4			—			—			81

Total derivative contracts		(61	)		(605	)		(97	)		191			5			(567	)
Other liabilities measured at fair value on a recurring basis		(40	)		(2	)		(2	)		2			—			(42	)

Total liabilities measured at fair value on a recurring basis	$	(101	)	$	(607	)	$	(99	)	$	193		$	5		$	(609	)

Other fair value measurement disclosures Long-term debt	$	—		$	(8,887	)	$	—		$	—		$	—		$	(8,887	)

Net Transfers into and out of Each Level of Fair Value Hierarchy

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


	Three Months Ended June 30,						Six Months Ended June 30,
	2013			2012			2013			2012
	(In millions)
Transfers into Level 1	$	(18	)	$	155		$	(19	)	$	159
Transfers out of Level 1		62			257			62			248

	$	44		$	412		$	43		$	407


Transfers into Level 2	$	(92	)	$	(342	)	$	(92	)	$	(293	)
Transfers out of Level 2		19			(138	)		18			(157	)

	$	(73	)	$	(480	)	$	(74	)	$	(450	)


Transfers into Level 3	$	—		$	23		$	2		$	50
Transfers out of Level 3		29			45			29			(7	)

	$	29		$	68		$	31		$	43

Changes in Physical Derivatives and Financial Assets and Liabilities that are Measured at Fair Value Based on Level 3 Inputs


	Three Months Ended June 30,						Six Months Ended June 30,
	2013			2012			2013			2012
	(In millions)
Balance at beginning of period	$	70		$	(268	)	$	141		$	(143	)
Unrealized pre-tax gains (losses) (a)		2			120			(61	)		(3	)
Purchases (b)		12			10			40			230
Sales (b)		(8	)		(23	)		(31	)		(257	)
Settlements (c)		2			180			(13	)		217
Transfers into Level 3		—			23			2			50
Transfers out of Level 3		29			45			29			(7	)

Balance at end of period	$	107		$	87		$	107		$	87

(a)

(b)

(c)

Risk Management and Trading Activities

The following table provides information about the Corporation’s significant recurring unobservable inputs used in the Level 3 fair value measurements. Natural gas contracts are usually quoted and transacted using basis pricing relative to an active pricing location (e.g., Henry Hub), for which price inputs represent the approximate value of differences in geography and local market conditions. All other price inputs below represent full contract prices. Significant changes in any of the inputs below, independently or correlated, may result in a different fair value.


	Unit of	Range /
	Measurement	Weighted Average
June 30, 2013
Assets
Commodity contracts with a fair value of $161 million (a)
Contract prices
Crude oil and refined petroleum products	$ / bbl (c)	$ 85.41 - 115.59 / 111.66
Electricity	$ / MWH (d)	$ 24.87 - 86.36 / 47.26

Basis prices
Natural gas	$ / MMBTU (e)	$ (1.10) - 6.39 / 0.10

Contract volatilities
Crude oil and refined petroleum products	%	16.00 - 21.00 / 17.00
Natural gas	%	19.00 - 32.00 / 22.00
Electricity	%	16.00 - 38.00 / 24.00


	Unit of Measurement		Range / Weighted Average
June 30, 2013
Liabilities
Commodity contracts with a fair value of $55 million (b) Contract prices
Crude oil and refined petroleum products		$ / bbl (c)	$ 92.86 - 116.04 / 112.67
Electricity		$ / MWH (d)	$ 29.24 - 82.45 / 46.73

Basis prices
Natural gas		$ / MMBTU (e)	$ (1.10) - 6.39 / 0.06

Contract volatilities
Crude oil and refined petroleum products		%	16.00 - 21.00 / 17.00
Natural gas		%	19.50 - 29.00 / 20.00


December 31, 2012
Assets
Commodity contracts with a fair value of $243 million Contract prices
Crude oil and refined petroleum products		$ / bbl (c)	$ 79.35 - 144.27 / 113.06
Electricity		$ / MWH (d)	$ 23.37 - 79.27 / 40.81

Basis prices
Natural gas		$ / MMBTU (e)	$ (0.47) - 6.66 / 0.39

Contract volatilities
Crude oil and refined petroleum products		%	23.00 - 27.00 / 26.00
Natural gas		%	21.00 - 36.00 / 25.00
Electricity		%	18.00 - 40.00 / 28.00


Liabilities
Commodity contracts with a fair value of $101 million Contract prices
Crude oil and refined petroleum products		$ / bbl (c)	$ 83.49 - 133.38 / 109.94
Electricity		$ / MWH (d)	$ 25.01 - 72.60 / 40.38

Basis prices
Natural gas		$ / MMBTU (e)	$ (0.72) - 6.66 /1.26

Contract volatilities
Crude oil and refined petroleum products		%	24.00 - 27.00 / 26.00
Natural gas		%	21.00 - 28.00 / 22.00

(a)

Included in Assets held for sale.

(b)

Included in Liabilities associated with assets held for sale.

(c)

Price per barrel.

(d)

Price per megawatt hour.

(e)

Price per million British thermal unit.

Note:

Fair value measurement for all recurring inputs was performed using a combination of income and market approach techniques.

Corporate Risk Management [Member]

Gross Volumes of Corporation's Derivative Instruments Outstanding

The gross volumes of the Corporate risk management derivative contracts outstanding were as follows:


	June 30, 2013		December 31, 2012
Commodity, primarily crude oil (millions of barrels)		17		1
Foreign exchange (millions of U.S. Dollars)	$	447	$	1,285
Interest rate swaps (millions of U.S. Dollars)	$	865	$	880

Energy Marketing Risk Management [Member]

Gross Volumes of Corporation's Derivative Instruments Outstanding

The gross volumes of the Corporation’s energy marketing commodity contracts outstanding were as follows:


	June 30, 2013		December 31, 2012
Crude oil and refined petroleum products (millions of barrels)		20		26
Natural gas (millions of mcf*)		3,028		2,938
Electricity (millions of megawatt hours)		243		278

*	One mcf represents one thousand cubic feet.

Trading Activities [Member]

Gross Volumes of Corporation's Derivative Instruments Outstanding

The gross volumes of derivative contracts outstanding relating to trading activities were as follows:


	June 30, 2013		December 31, 2012
Commodity
Crude oil and refined petroleum products (millions of barrels)		1,649		1,179
Natural gas (millions of mcf)		3,748		3,377
Electricity (millions of megawatt hours)		8		19
Foreign exchange (millions of U.S. Dollars)	$	117	$	412
Other
Interest rate (millions of U.S. Dollars)	$	99	$	167
Equity securities (millions of shares)		16		14

Basis of Presentation - Additional Information (Detail)	6 Months Ended
Basis of Presentation - Additional Information (Detail)	Jun. 30, 2013
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Anticipated completion of divestitures	One year

Discontinued Operations - Downstream Businesses - Summary of Sales and Other Operating Revenues and Income (Loss) from Discontinued Operations (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Discontinued Operations [Line Items]
Income (loss) from discontinued operations, net of income taxes	$ 27	$ (5)	$ 117	$ 16
Less: Net income (loss) attributable to noncontrolling interests	16	(17)	6	(8)
Net income (loss) from discontinued operations attributable to Hess Corporation	11	12	111	24
Discontinued Downstream Businesses [Member]
Discontinued Operations [Line Items]
Sales and other operating revenues	5,652	5,991	13,065	12,791
Income (loss) from discontinued operations before income taxes	31	(6)	175	24
Provision (benefit) for income taxes	4	(1)	58	8
Income (loss) from discontinued operations, net of income taxes	27	(5)	117	16
Less: Net income (loss) attributable to noncontrolling interests	16	(17)	6	(8)
Net income (loss) from discontinued operations attributable to Hess Corporation	$ 11	$ 12	$ 111	$ 24

- Definition

Overall income (loss) from a disposal group that is classified as a component of the entity, before income tax, reported as a separate component of income before extraordinary items. Includes the following (before income tax): income (loss) from operations during the phase-out period, gain (loss) on disposal, provision (or any reversals of earlier provisions) for loss on disposal, and adjustments of a prior period gain (loss) on disposal.

+ References + Details

- Definition

Tax effect allocated to a disposal group that is classified as a component of the entity reported as a separate component of income before extraordinary items. Includes the tax effects of the following: income (loss) from operations during the phase-out period, gain (loss) on disposal, provision (or any reversals of earlier provisions) for loss on disposal, and adjustments of a prior period gain (loss) on disposal.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (b),(c)
-URI http://asc.fasb.org/extlink&oid=6360339&loc=d3e1361-107760

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32672-109319

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 20
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=18498875&loc=d3e38679-109324

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 20
-Section 45
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6892542&loc=d3e957-107759

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 144
-Paragraph 47
-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 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 109
-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 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 144
-Paragraph 43
-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

- Definition

Amount of income (loss) from a disposal group, net of income tax before extraordinary items allocable to noncontrolling interests. Includes, net of tax, income (loss) from operations during the phase-out period, gain (loss) on disposal, provision (or any reversals of earlier provisions) for loss on disposal, and adjustments of a prior period gain (loss) on disposal.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 225
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-04.12)
-URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.14)
-URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=6360339&loc=d3e1361-107760

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 20
-Section 45
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6892542&loc=d3e957-107759

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 04
-Paragraph 13
-Article 7

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 51
-Paragraph 29
-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)
-Number 144
-Paragraph 43
-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 Statement of Financial Accounting Standard (FAS)
-Number 144
-Paragraph 47
-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 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 03
-Paragraph 15
-Article 5

+ Details

- Definition

This element represents the overall income (loss) from a disposal group that is classified as a component of the entity, net of income tax, reported as a separate component of income before extraordinary items, which is apportioned to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This item includes the following (net of tax): income (loss) from operations during the phase-out period, gain (loss) on disposal, provision (or any reversals of earlier provisions) for loss on disposal, and adjustments of a prior period gain (loss) on disposal.

+ References + Details

- Definition

Amount of income (loss) from a disposal group, net of income tax, reported as a separate component of income before extraordinary items after deduction or consideration of the amount allocable to noncontrolling interests. Includes, net of tax, income (loss) from operations during the phase-out period, gain (loss) on disposal, provision (or any reversals of earlier provisions) for loss on disposal, and adjustments of a prior period gain (loss) on disposal.

+ References + Details

Discontinued Operations - Downstream Businesses - Summary of Assets and Liabilities of Discontinued Downstream Businesses (Detail) - Discontinued Downstream Businesses [Member] $ in Millions	Jun. 30, 2013 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Accounts receivable	$ 2,138
Inventories	605
Investment in affiliates	177
Property, plant and equipment, net	1,221
Other assets	156
Total assets	4,297
Accounts payable and accrued liabilities	2,122
Other liabilities and deferred credits	130
Total liabilities	$ 2,252

Discontinued Operations - Downstream Businesses - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2013	Jun. 30, 2013	Dec. 31, 2012
Income Statement by Disposal Groups, Including Discontinued Operations [Line Items]
Refined petroleum products and natural gas			$ 1,362
Less: Last-in, first-out (LIFO) adjustment			1,123
Other inventories		$ 390	$ 527
Effect of LIFO inventory liquidation following the cessation of refining operations at the Port Reading facility	$ 218
Effect of LIFO inventory liquidation following the cessation of refining operations at the Port Reading facility, after income taxes	137
Additional depreciation due to the cessation of refining operations at the Port Reading facility	$ 80
Discontinued Downstream Businesses [Member]
Income Statement by Disposal Groups, Including Discontinued Operations [Line Items]
Refined petroleum products and natural gas		1,304
Less: Last-in, first-out (LIFO) adjustment		801
Other inventories		$ 102

Exit and Disposal Costs - Components of and Changes in Restructuring Accruals (Detail) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2013
Restructuring Cost and Reserve [Line Items]
Provision	$ 33
Balance at ending of period	194	$ 194
Total restructuring accruals	194	194
Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Provision		191
Payments		(10)
Balance at ending of period	181	181
Total restructuring accruals	181	181
Facility and Other Exit Costs [Member]
Restructuring Cost and Reserve [Line Items]
Provision		44
Payments		(31)
Balance at ending of period	13	13
Total restructuring accruals	13	13
Exploration and Production [Member]
Restructuring Cost and Reserve [Line Items]
Balance at ending of period	75	75
Total restructuring accruals	75	75
Exploration and Production [Member] \| Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Provision		83
Payments		(8)
Balance at ending of period	75	75
Total restructuring accruals	75	75
Exploration and Production [Member] \| Facility and Other Exit Costs [Member]
Restructuring Cost and Reserve [Line Items]
Provision		9
Payments		(9)
Balance at ending of period
Total restructuring accruals
Corporate and Other [Member]
Restructuring Cost and Reserve [Line Items]
Balance at ending of period	19	19
Total restructuring accruals	19	19
Corporate and Other [Member] \| Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Provision		19
Payments
Balance at ending of period	19	19
Total restructuring accruals	19	19
Corporate and Other [Member] \| Facility and Other Exit Costs [Member]
Restructuring Cost and Reserve [Line Items]
Provision
Payments
Balance at ending of period
Total restructuring accruals
Downstream Businesses [Member]
Restructuring Cost and Reserve [Line Items]
Balance at ending of period	100	100
Total restructuring accruals	100	100
Downstream Businesses [Member] \| Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Provision		89
Payments		(2)
Balance at ending of period	87	87
Total restructuring accruals	87	87
Downstream Businesses [Member] \| Facility and Other Exit Costs [Member]
Restructuring Cost and Reserve [Line Items]
Provision		35
Payments		(22)
Balance at ending of period	13	13
Total restructuring accruals	$ 13	$ 13

Exit and Disposal Costs - Components of and Changes in Restructuring Accruals (Parenthetical) (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Restructuring Cost and Reserve [Line Items]
Provision	$ 33
INCOME (LOSS) FROM DISCONTINUED OPERATIONS, NET OF INCOME TAXES	27	$ (5)	$ 117	$ 16
Discontinued Operations [Member]
Restructuring Cost and Reserve [Line Items]
INCOME (LOSS) FROM DISCONTINUED OPERATIONS, NET OF INCOME TAXES	20		89
Operating Costs and Expenses [Member] \| Exploration and Production [Member]
Restructuring Cost and Reserve [Line Items]
Provision	10		44
Exploration Expenses [Member] \| Exploration and Production [Member]
Restructuring Cost and Reserve [Line Items]
Provision	1		15
General and Administrative Expenses [Member]
Restructuring Cost and Reserve [Line Items]
Provision	$ 2		$ 43

- Definition

+ References

+ Details

Exit and Disposal Costs - Additional Information (Detail) $ in Millions	6 Months Ended
	Jun. 30, 2013 USD ($)
Restructuring Cost and Reserve [Line Items]
Enhanced benefit charges	$ 80
Additional facility exit costs	35
Discontinued Operations [Member]
Restructuring Cost and Reserve [Line Items]
Enhanced benefit charges	45
Exploration and Production [Member]
Restructuring Cost and Reserve [Line Items]
Enhanced benefit charges	10
Corporate and Other [Member]
Restructuring Cost and Reserve [Line Items]
Enhanced benefit charges	$ 25

Dispositions - Additional Information (Detail) - USD ($) $ in Millions	1 Months Ended			3 Months Ended	6 Months Ended
	Apr. 30, 2013	Jan. 31, 2013	Jan. 31, 2012	Mar. 31, 2013	Jun. 30, 2013	Jun. 30, 2012
Dispositions [Abstract]
Cash proceeds from asset sales					$ 3,799	$ 132
Goodwill written off related to sale of business unit					$ 339
Azeri-Chirag-Guneshli (ACG) fields [Member]
Dispositions [Abstract]
Corporation's proportionate interest in oil and gas assets (in percentage)				3.00%
Baku-Tbilisi-Ceyhan (BTC) pipeline [Member]
Dispositions [Abstract]
Corporation's proportionate interest in oil and gas assets (in percentage)				2.00%
Baku-Tbilisi-Ceyhan pipeline and Azeri-Chirag-Guneshli fields [Member]
Dispositions [Abstract]
Cash proceeds from asset sales				$ 884
Gain on asset sale, after-tax				360
Goodwill written off related to sale of business unit				$ 52
Samara-Nafta [Member]
Dispositions [Abstract]
Cash proceeds from sale of subsidiary	$ 2,100
Corporation's proportionate interest in oil and gas assets (in percentage)	90.00%
Cash proceeds from asset sales	$ 1,900
Gain on asset sale, after-tax	1,119
Goodwill written off related to sale of business unit	148
Net gain on sale attributable to noncontrolling interest holder's share	168
Net gain on sale attributable to parent	$ 951
Beryl Fields and Scottish Area Gas Evacuation System (SAGE) [Member]
Dispositions [Abstract]
Cash proceeds from asset sales		$ 442
Gain on asset sale, after-tax		323
Goodwill written off related to sale of business unit		$ 48
Beryl Fields [Member]
Dispositions [Abstract]
Corporation's proportionate interest in oil and gas assets (in percentage)		22.00%
Snohvit [Member]
Dispositions [Abstract]
Corporation's proportionate interest in oil and gas assets (in percentage)			3.00%
Cash proceeds from asset sales			$ 132
Gain on asset sale, after-tax			$ 36

Inventories - Inventories (Detail) - USD ($) $ in Millions	Jun. 30, 2013	Dec. 31, 2012
Inventory Disclosure [Abstract]
Crude oil and other charge stocks	$ 293	$ 493
Refined petroleum products and natural gas		1,362
Less: LIFO		(1,123)
Total net crude oil, natural gas and refined petroleum product inventories	293	732
Merchandise, materials and supplies	390	527
Total inventories	$ 683	$ 1,259

Property, Plant and Equipment - Exploration and Production - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Mar. 31, 2013	Jun. 30, 2013	Dec. 31, 2012
Capitalized Exploratory [Line Items]
GOODWILL	$ 170
Assets retirement obligations and deferred income taxes reported in liabilities associated with assets held for sale		$ 2,664	$ 539
Pailin [Member] \| Thailand [Member]
Capitalized Exploratory [Line Items]
Corporation's proportionate interest in oil and gas assets (in percentage)		15.00%
Sinphuhorm [Member] \| Thailand [Member]
Capitalized Exploratory [Line Items]
Corporation's proportionate interest in oil and gas assets (in percentage)		35.00%
Pangkah [Member] \| Indonesia [Member]
Capitalized Exploratory [Line Items]
Corporation's proportionate interest in oil and gas assets (in percentage)		75.00%
Natuna [Member] \| Indonesia [Member]
Capitalized Exploratory [Line Items]
Corporation's proportionate interest in oil and gas assets (in percentage)		23.00%
Exploration and Production [Member]
Capitalized Exploratory [Line Items]
Carrying amount of properties classified as held for sale		$ 1,583
GOODWILL		170
Assets retirement obligations and deferred income taxes reported in liabilities associated with assets held for sale		$ 412

Property, Plant and Equipment - Downstream Businesses - Additional Information (Detail) - USD ($) $ in Millions	1 Months Ended	6 Months Ended
	Jul. 31, 2013	Jun. 30, 2013	Jun. 30, 2012
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash proceeds from asset sales		$ 3,799	$ 132
Subsequent Event [Member] \| Discontinued Downstream Businesses [Member] \| Energy Marketing Business [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash proceeds from asset sales	$ 1,025

Property, Plant and Equipment - Net Changes in Capitalized Exploratory Well Costs (Detail) $ in Millions	6 Months Ended
	Jun. 30, 2013 USD ($)
Property Plant And Equipment [Abstract]
Beginning Balance	$ 2,259
Additions to capitalized exploratory well costs pending the determination of proved reserves	132
Reclassifications to wells, facilities and equipment based on the determination of proved reserves	(69)
Capitalized exploratory well costs charged to expense	(7)
Dispositions and other	(78)
Ending Balance	$ 2,237

Property, Plant and Equipment - Capitalized Exploratory Well Costs - Additional Information (Detail) $ in Millions	1 Months Ended	6 Months Ended
	Feb. 28, 2013 Well	Jun. 30, 2013 USD ($)
Significant Acquisitions and Disposals [Line Items]
Exploratory dry hole costs which were incurred and subsequently expensed		$ 61
Capitalized exploratory well costs greater than one year old after completion of drilling		$ 1,996
Capitalized well costs in excess of one year attributable to Block WA-390-P, offshore Western Australia		42.00%
Capitalized well costs attributable to Pony project		32.00%
Capitalized well costs attributable to Area 54, offshore Libya		13.00%
Stampede [Member]
Significant Acquisitions and Disposals [Line Items]
Working interest in the blocks		20.00%
Ghana [Member]
Significant Acquisitions and Disposals [Line Items]
Capitalized well costs attributable to Ghana	8.00%
Number of consecutive successful exploration wells \| Well	7

Property, Plant and Equipment - Asset Impairments - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2012
Property Plant And Equipment [Abstract]
Asset impairments	$ 59	$ 59
Impairment charges, after-tax	$ 36

Goodwill - Changes in Carrying Amount of Goodwill (Detail) $ in Millions	6 Months Ended
	Jun. 30, 2013 USD ($)
Goodwill And Intangible Assets Disclosure [Abstract]
Balance at January 1, 2013	$ 2,208
Dispositions	(339)
Balance at June 30, 2013	$ 1,869

- Definition

Carrying amount as of the balance sheet date, which is the cumulative amount paid and (if applicable) the fair value of any noncontrolling interest in the acquiree, adjusted for any amortization recognized prior to the adoption of any changes in generally accepted accounting principles (as applicable) and for any impairment charges, in excess of the fair value of net assets acquired in one or more business combination transactions.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=14024403&loc=d3e13816-109267

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 142
-Paragraph 45
-Subparagraph e
-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 142
-Paragraph 43
-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 141R
-Paragraph 72
-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 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 142
-Paragraph 45
-Subparagraph e
-Clause 1
-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)
-Number 141R
-Paragraph 68
-Subparagraph l
-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 Statement of Financial Accounting Standard (FAS)
-Number 141R
-Paragraph 34
-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

Goodwill - Changes in Carrying Amount of Goodwill (Parenthetical) (Detail) $ in Millions	3 Months Ended
	Mar. 31, 2013 USD ($)
Goodwill And Intangible Assets Disclosure [Abstract]
Goodwill Reclassified to Assets Held For Sale	$ 170

Debt - Additional Information (Detail) $ in Millions	6 Months Ended
Debt - Additional Information (Detail) $ in Millions	Jun. 30, 2013 USD ($) Lease
Debt Disclosure [Abstract]
Net repayments of debt	$ 2,348
Repayments under short-term facilities	990
Repayments under revolving credit facility	758
Repayments under asset-backed facility	600
Repayments relating to other debt	92
Capital lease obligation	$ 98
Acquisition of leased gasoline stations \| Lease	50
Repayments of capital lease obligation	$ 60

Foreign Currency - Pre-Tax Foreign Currency Gains (Losses) (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Foreign Currency [Abstract]
Pre-tax foreign currency gains (losses)	$ (19)	$ (14)	$ (50)	$ 7

- 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 - Components of Net Periodic Pension Cost (Detail) - Pension Plans [Member] - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 17	$ 18	$ 37	$ 36
Interest cost	22	22	44	44
Expected return on plan assets	(36)	(29)	(69)	(58)
Amortization of net loss	13	21	34	42
Pension expense	$ 16	$ 32	$ 46	$ 64

- 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

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 30
-Glossary Expected Return on Plan Assets
-URI http://asc.fasb.org/extlink&oid=6512136

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 60
-Glossary Expected Return on Plan Assets
-URI http://asc.fasb.org/extlink&oid=6512171

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (h)(3)
-URI http://asc.fasb.org/extlink&oid=21915506&loc=d3e1928-114920

Reference 4: 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 5: 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 6: 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.

+ 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 Accounting Standards Codification
-Glossary Service Cost (Component of Net Periodic Pension Cost)
-URI http://asc.fasb.org/extlink&oid=6525008

Reference 2: 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=21915506&loc=d3e1928-114920

Reference 3: 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=21915506&loc=d3e1928-114920

Reference 4: 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 5: 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 6: 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.

+ Details

Retirement Plans - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Mar. 31, 2013	Jun. 30, 2013
Compensation And Retirement Disclosure [Abstract]
Reduction of accrued benefit plan liabilities and pre-tax unrecognized actuarial losses	$ 245	$ 245
Estimated pension expense for 2013		80
Estimated amortization of unrecognized net actuarial losses for 2013		60
Budgeted contributions to funded pension plans in 2013		140
Corporation contributed to its pension plans		$ 70

Weighted Average Common Shares - Net Income and Weighted Average Number of Common Shares Used in Basic and Diluted Earnings Per Share Computations (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Earnings Per Share [Abstract]
Income from continuing operations, net of income taxes	$ 1,589	$ 540	$ 2,772	$ 1,079
Less: Net income attributable to noncontrolling interests	169	3	176	9
Net income from continuing operations attributable to Hess Corporation	1,420	537	2,596	1,070
INCOME (LOSS) FROM DISCONTINUED OPERATIONS, NET OF INCOME TAXES	27	(5)	117	16
Less: Net income (loss) attributable to noncontrolling interests	16	(17)	6	(8)
Net income (loss) from discontinued operations attributable to Hess Corporation	11	12	111	24
NET INCOME ATTRIBUTABLE TO HESS CORPORATION	$ 1,431	$ 549	$ 2,707	$ 1,094
Weighted average common shares outstanding:
Basic	340.1	338.5	339.6	338.2
Effect of dilutive securities
Restricted common stock	1.1	0.9	1.3	1.0
Stock options	1.9	1.0	1.6	1.2
Performance share units	0.9		0.9
Diluted	344.0	340.4	343.4	340.4
BASIC:
Continuing operations	$ 4.18	$ 1.58	$ 7.64	$ 3.17
Discontinued operations	0.03	0.04	0.33	0.07
Net income per share	4.21	1.62	7.97	3.24
DILUTED:
Continuing operations	4.13	1.58	7.56	3.14
Discontinued operations	0.03	0.03	0.32	0.07
Net income per share	$ 4.16	$ 1.61	$ 7.88	$ 3.21

Weighted Average Common Shares - Additional Information (Detail) - shares	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Dilutive Securities Included And Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Restricted stock granted			1,205,569	1,525,646
Performance shares granted			279,093	415,773
Out-of-the-money stock options	3,793,948	8,144,000	5,091,024	7,509,000
Performance Share Units [Member]
Dilutive Securities Included And Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Out-of-the-money stock options		408,122		408,122

- Definition

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Antidilution
-URI http://asc.fasb.org/extlink&oid=6505113

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Diluted Earnings Per Share
-URI http://asc.fasb.org/extlink&oid=6510752

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Contingent Stock Agreement
-URI http://asc.fasb.org/extlink&oid=6508534

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 128
-Paragraph 40
-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 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 128
-Paragraph 13, 14
-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 Emerging Issues Task Force (EITF)
-Number 07-4
-Paragraph 4
-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 Statement of Financial Accounting Standard (FAS)
-Number 128
-Paragraph 171
-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

Segment Information - Additional Information (Detail)	6 Months Ended
Segment Information - Additional Information (Detail)	Jun. 30, 2013 Segment
Segment Reporting [Abstract]
Number of operating segments for the Corporation	1

Segment Information - Corporation's Results by Operating Segment (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Net income (loss) attributable to Hess Corporation:
Net income (loss) attributable to Hess Corporation	$ 1,420	$ 537	$ 2,596	$ 1,070
Discontinued operations	11	12	111	24
Total	1,431	549	2,707	1,094
Exploration and Production [Member]
Operating revenues from continuing operations	3,011	3,324	6,477	6,220
Net income (loss) attributable to Hess Corporation:
Net income (loss) attributable to Hess Corporation	1,533	644	2,819	1,279
Corporate and Other [Member]
Net income (loss) attributable to Hess Corporation:
Net income (loss) attributable to Hess Corporation	(113)	(107)	(223)	(209)
Discontinued Downstream Businesses [Member]
Net income (loss) attributable to Hess Corporation:
Discontinued operations	$ 11	$ 12	$ 111	$ 24

- Definition

Amount of income (loss) from continuing operations attributable to the parent. Also defined as revenue less expenses and taxes from ongoing operations before extraordinary items but after deduction of those portions of income or loss from continuing operations that are allocable to noncontrolling interests.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.13)
-URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 45
-Paragraph 18
-URI http://asc.fasb.org/extlink&oid=7656940&loc=SL4613673-111683

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 51
-Paragraph 38
-Subparagraph b(1)
-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 AICPA
-Name Accounting Research Bulletin (ARB)
-Number 51
-Paragraph 29
-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 AICPA
-Name Accounting Research Bulletin (ARB)
-Number 51
-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.

+ Details

- Definition

+ References + Details

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Net Income
-URI http://asc.fasb.org/extlink&oid=6518256

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 225
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-04.19)
-URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.18)
-URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 225
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-04.22)
-URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Other Comprehensive Income
-URI http://asc.fasb.org/extlink&oid=6519514

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=20435746&loc=d3e565-108580

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 51
-Paragraph 38
-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 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 130
-Paragraph 10, 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 11: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 51
-Paragraph A7
-Appendix A

Reference 12: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Emerging Issues Task Force (EITF)
-Number 87-21
-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 SEC
-Name Regulation S-X (SX)
-Number 210
-Section 03
-Paragraph 19
-Article 5

Reference 14: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 51
-Paragraph 38
-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 15: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 95
-Paragraph 28, 29, 30
-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 16: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 04
-Paragraph 20
-Article 9

+ Details

Segment Information - Identifiable Assets by Operating Segment (Detail) - USD ($) $ in Millions	Jun. 30, 2013	Dec. 31, 2012
Assets	$ 41,428	$ 43,441
Exploration and Production [Member]
Assets	35,998	37,687
Corporate and Other [Member]
Assets	937	813
Discontinued Downstream Businesses [Member]
Assets	$ 4,493	$ 4,941

Risk Management and Trading Activities - Trading Activities - Additional Information (Detail)	6 Months Ended
	Jun. 30, 2013
Derivative [Line Items]
Voting interest in trading partnership	50.00%
Percentage of information disclosed for trading partnership	100.00%
Trading Activities [Member]
Derivative [Line Items]
Voting interest in trading partnership	50.00%

Risk Management and Trading Activities - Gross Volume of Corporation's Derivative Instruments Outstanding (Detail) shares in Millions, $ in Millions	Jun. 30, 2013 USD ($) bbl MWh Mcf shares	Dec. 31, 2012 USD ($) bbl MWh Mcf shares
Derivative [Line Items]
Interest rate swaps (millions of U.S. Dollars)	$ 865	$ 880
Gross volume of derivative contracts outstanding relating to trading activities [Member]
Derivative [Line Items]
Foreign exchange (millions of U.S. Dollars)	117	412
Interest rate swaps (millions of U.S. Dollars)	99	167
Gross volume of the Corporate risk management derivative instruments outstanding [Member]
Derivative [Line Items]
Foreign exchange (millions of U.S. Dollars)	447	1,285
Interest rate swaps (millions of U.S. Dollars)	$ 865	$ 880
Crude oil and refined petroleum products (millions of barrels) [Member] \| Gross volume of the Corporation's energy marketing commodity contracts outstanding [Member]
Derivative [Line Items]
Absolute volume of derivative commodity contracts \| bbl	20	26
Crude oil and refined petroleum products (millions of barrels) [Member] \| Gross volume of derivative contracts outstanding relating to trading activities [Member]
Derivative [Line Items]
Absolute volume of derivative commodity contracts \| bbl	1,649	1,179
Natural gas (millions of mcf) [Member] \| Gross volume of the Corporation's energy marketing commodity contracts outstanding [Member]
Derivative [Line Items]
Absolute volume of derivative commodity contracts \| Mcf	3,028	2,938
Natural gas (millions of mcf) [Member] \| Gross volume of derivative contracts outstanding relating to trading activities [Member]
Derivative [Line Items]
Absolute volume of derivative commodity contracts \| Mcf	3,748	3,377
Electricity (millions of megawatt hours) [Member] \| Gross volume of the Corporation's energy marketing commodity contracts outstanding [Member]
Derivative [Line Items]
Absolute volume of derivative commodity contracts \| MWh	243	278
Electricity (millions of megawatt hours) [Member] \| Gross volume of derivative contracts outstanding relating to trading activities [Member]
Derivative [Line Items]
Absolute volume of derivative commodity contracts \| MWh	8	19
Equity securities (millions of shares) [Member] \| Gross volume of derivative contracts outstanding relating to trading activities [Member]
Derivative [Line Items]
Equity securities (millions of shares) \| shares	16	14
Commodity, primarily crude oil (millions of barrels) [Member] \| Gross volume of the Corporate risk management derivative instruments outstanding [Member]
Derivative [Line Items]
Absolute volume of derivative commodity contracts \| bbl	17	1

Risk Management and Trading Activities - Corporate Risk Management Activities - Additional Information (Detail) $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2013 USD ($)	Jun. 30, 2012 USD ($)	Jun. 30, 2013 USD ($)	Jun. 30, 2012 USD ($)	Dec. 31, 2012 USD ($) bbl $ / bbl	Mar. 31, 2013 bbl $ / bbl
Derivative [Line Items]
Total number of barrels per day hedged based on new Brent crude oil cash flow hedges \| bbl					120,000	90,000
Average price for hedges (per barrel) \| $ / bbl					107.70	109.70
Number of barrels per day hedged crude oil that realized hedge losses \| bbl					24,000
Interest rate swaps	$ 865		$ 865		$ 880
New Brent Crude Hedges [Member]
Derivative [Line Items]
Change in the carrying value of the hedged fixed-rate debt - increase/(decrease)	(23)	$ 13	(28)	$ 10
Change in the fair value of interest rate swaps - increase/(decrease)	(23)	13	(28)	10
Corporate Risk Management [Member] \| Foreign exchange [Member]
Derivative [Line Items]
Net realized and unrealized pre-tax gains (losses) on foreign exchange contracts	(7)	(22)	(40)	4
Corporate Risk Management [Member] \| Closed & New Brent Crude Hedges [Member]
Derivative [Line Items]
After-tax deferred gains in Accumulated other comprehensive income (loss)	63		63
Corporate Risk Management [Member] \| New Brent Crude Hedges [Member]
Derivative [Line Items]
Gain (loss) on ineffectiveness reflected in earnings	3	3	18	(8)
Sales and other operating revenues [Member]
Derivative [Line Items]
Realized gains (losses) from E&P hedging activities due to the increase (decrease) in sales and other operating revenue	52	(141)	34	(385)
Realized gains (losses) from E&P hedging activities net of taxes	$ 33	$ (89)	$ 22	$ (240)

Risk Management and Trading Activities - Energy Marketing Risk Management Activities - Additional Information (Detail) - Energy Marketing Risk Management Activities [Member] - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2012
Derivative [Line Items]
After-tax deferred losses in Accumulated other comprehensive income (loss)	$ 9		$ 9		$ 22
Not designated as hedges [Member]
Derivative [Line Items]
Net realized and unrealized pre-tax gains on derivative contracts not designated as hedges	$ 44	$ 24	$ 76	$ 79

- Definition

Accumulated change, net of tax, in accumulated gains and losses from derivative instruments designated and qualifying as the effective portion of cash flow hedges. Includes an entity's share of an equity investee's Increase or Decrease in deferred hedging gains or losses.

+ References + Details

Risk Management and Trading Activities - Pre-Tax Gains (Losses) from Trading Activities (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Derivative Instruments, Gain (Loss) [Line Items]
Pre-tax gains (losses) from trading activities	$ 57	$ (25)	$ 56	$ 9
Commodity [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Pre-tax gains (losses) from trading activities	54	(25)	47	8
Foreign exchange [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Pre-tax gains (losses) from trading activities	1	2	1	2
Other [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Pre-tax gains (losses) from trading activities	$ 2	$ (2)	$ 8	$ (1)

Risk Management and Trading Activities - Netting Arrangements on Physical and Financial Derivative Assets and Liabilities (Detail) - USD ($) $ in Millions	Jun. 30, 2013	Dec. 31, 2012
Derivatives, Fair Value [Line Items]
Gross Amounts, Assets	$ 3,660	$ 3,353
Physical Derivative and Financial Instruments, Assets	(2,786)	(2,750)
Cash Collateral, Assets	(21)	(34)
Net Amounts Presented in the Consolidated Balance Sheet, Assets	853	569
Gross Amounts Not Offset in the Consolidated Balance Sheet, Assets	(45)	(51)
Net Amount, Assets	808	518
Gross Amounts, Liabilities	(3,505)	(3,322)
Physical Derivative and Financial Instruments, Liabilities	2,786	2,750
Cash Collateral, Liabilities	141	5
Net Amounts Presented in the Consolidated Balance Sheet, Liabilities	(578)	(567)
Gross Amounts Not Offset in the Consolidated Balance Sheet, Liabilities	45	51
Net Amount, Liabilities	(533)	(516)
Commodity [Member]
Derivatives, Fair Value [Line Items]
Gross Amounts, Assets	3,600	3,253
Physical Derivative and Financial Instruments, Assets	(2,673)	(2,661)
Cash Collateral, Assets	(21)	(34)
Net Amounts Presented in the Consolidated Balance Sheet, Assets	906	558
Gross Amounts Not Offset in the Consolidated Balance Sheet, Assets	(29)	(45)
Net Amount, Assets	877	513
Gross Amounts, Liabilities	(3,484)	(3,312)
Physical Derivative and Financial Instruments, Liabilities	2,673	2,661
Cash Collateral, Liabilities	141	5
Net Amounts Presented in the Consolidated Balance Sheet, Liabilities	(670)	(646)
Gross Amounts Not Offset in the Consolidated Balance Sheet, Liabilities	29	45
Net Amount, Liabilities	(641)	(601)
Other [Member]
Derivatives, Fair Value [Line Items]
Gross Amounts, Liabilities	(21)	(10)
Physical Derivative and Financial Instruments, Liabilities	8	8
Cash Collateral, Liabilities
Net Amounts Presented in the Consolidated Balance Sheet, Liabilities	(13)	(2)
Gross Amounts Not Offset in the Consolidated Balance Sheet, Liabilities	16	6
Net Amount, Liabilities	3	4
Counterparty netting [Member]
Derivatives, Fair Value [Line Items]
Gross Amounts, Assets
Physical Derivative and Financial Instruments, Assets	(105)	(81)
Cash Collateral, Assets
Net Amounts Presented in the Consolidated Balance Sheet, Assets	(105)	(81)
Gross Amounts Not Offset in the Consolidated Balance Sheet, Assets
Net Amount, Assets	(105)	(81)
Gross Amounts, Liabilities
Physical Derivative and Financial Instruments, Liabilities	105	81
Cash Collateral, Liabilities
Net Amounts Presented in the Consolidated Balance Sheet, Liabilities	105	81
Gross Amounts Not Offset in the Consolidated Balance Sheet, Liabilities
Net Amount, Liabilities	105	81
Interest rate and other [Member]
Derivatives, Fair Value [Line Items]
Gross Amounts, Assets	60	100
Physical Derivative and Financial Instruments, Assets	(8)	(8)
Cash Collateral, Assets
Net Amounts Presented in the Consolidated Balance Sheet, Assets	52	92
Gross Amounts Not Offset in the Consolidated Balance Sheet, Assets	(16)	(6)
Net Amount, Assets	$ 36	$ 86

Risk Management and Trading Activities - Fair Value Measurements - Additional Information (Detail) - USD ($) $ in Millions	Jun. 30, 2013	Dec. 31, 2012
Derivative [Line Items]
Total net derivative contract assets	$ 808	$ 518
Total net derivative contract liabilities	533	516
Discontinued Operations [Member]
Derivative [Line Items]
Total net derivative contract assets	659	483
Total net derivative contract liabilities	$ 567	$ 565

- Definition

Fair values as of the balance sheet date of all assets resulting from contracts that meet the criteria of being accounted for as derivative instruments, net of the effects of master netting arrangements.

+ References + Details

- Definition

Fair values as of the balance sheet date of all liabilities resulting from contracts that meet the criteria of being accounted for as derivative instruments, net of the effects of master netting arrangements.

+ References + Details

Risk Management and Trading Activities - Gross and Net Fair Values of Corporate and Energy Marketing Risk Management and Trading Derivative Instruments (Detail) - USD ($) $ in Millions	Jun. 30, 2013	Dec. 31, 2012
Accounts Receivable [Member]
Derivatives, Fair Value [Line Items]
Derivative contracts designated as hedging instruments	$ 204	$ 137
Derivative contracts not designated as hedging instruments	3,456	3,216
Gross fair value of derivative contracts	3,660	3,353
Master netting arrangements	(2,786)	(2,750)
Cash collateral (received) posted	(21)	(34)
Net fair value of derivative contracts	853	569
Accounts Receivable [Member] \| Commodity [Member]
Derivatives, Fair Value [Line Items]
Derivative contracts designated as hedging instruments	159	65
Derivative contracts not designated as hedging instruments	3,441	3,188
Accounts Receivable [Member] \| Interest rate and other [Member]
Derivatives, Fair Value [Line Items]
Derivative contracts designated as hedging instruments	45	72
Accounts Receivable [Member] \| Foreign exchange [Member]
Derivatives, Fair Value [Line Items]
Derivative contracts not designated as hedging instruments	1	14
Accounts Receivable [Member] \| Other [Member]
Derivatives, Fair Value [Line Items]
Derivative contracts not designated as hedging instruments	14	14
Accounts Payable [Member]
Derivatives, Fair Value [Line Items]
Derivative contracts designated as hedging instruments	(20)	(126)
Derivative contracts not designated as hedging instruments	(3,485)	(3,196)
Gross fair value of derivative contracts	(3,505)	(3,322)
Master netting arrangements	2,786	2,750
Cash collateral (received) posted	141	5
Net fair value of derivative contracts	(578)	(567)
Accounts Payable [Member] \| Commodity [Member]
Derivatives, Fair Value [Line Items]
Derivative contracts designated as hedging instruments	(18)	(124)
Derivative contracts not designated as hedging instruments	(3,466)	(3,188)
Accounts Payable [Member] \| Interest rate and other [Member]
Derivatives, Fair Value [Line Items]
Derivative contracts designated as hedging instruments	(2)	(2)
Accounts Payable [Member] \| Foreign exchange [Member]
Derivatives, Fair Value [Line Items]
Derivative contracts not designated as hedging instruments	(10)
Accounts Payable [Member] \| Other [Member]
Derivatives, Fair Value [Line Items]
Derivative contracts not designated as hedging instruments	$ (9)	$ (8)

Risk Management and Trading Activities - Fair Values for Corporation's Net Physical Derivative Financial Assets and Liabilities (Detail) - USD ($) $ in Millions	Jun. 30, 2013	Dec. 31, 2012
Assets
Total derivative contracts (Assets)	$ 161	$ 243
Net derivative contracts (Assets)	853	569
Other assets measured at fair value on a recurring basis	1	52
Total assets measured at fair value on a recurring basis	854	621
Liabilities
Total derivative contracts (Liabilities)	(55)	(101)
Net derivative contracts (Liabilities)	(578)	(567)
Other liabilities measured at fair value on a recurring basis	(17)	(42)
Total liabilities measured at fair value on a recurring basis	(595)	(609)
Other fair value measurement disclosures Long-term debt	(6,692)	(8,887)
Commodity [Member]
Assets
Total derivative contracts (Assets)	906	558
Liabilities
Total derivative contracts (Liabilities)	(670)	(646)
Interest rate and other [Member]
Assets
Total derivative contracts (Assets)	52	92
Net derivative contracts (Assets)	52	92
Collateral and counterparty netting [Member]
Assets
Net derivative contracts (Assets)	(105)	(81)
Liabilities
Net derivative contracts (Liabilities)	105	81
Other [Member]
Liabilities
Total derivative contracts (Liabilities)	(13)	(2)
Level 1 [Member]
Assets
Net derivative contracts (Assets)	64	77
Other assets measured at fair value on a recurring basis	1	5
Total assets measured at fair value on a recurring basis	65	82
Liabilities
Net derivative contracts (Liabilities)	(233)	(61)
Other liabilities measured at fair value on a recurring basis	(17)	(40)
Total liabilities measured at fair value on a recurring basis	(250)	(101)
Other fair value measurement disclosures Long-term debt
Level 1 [Member] \| Commodity [Member]
Assets
Total derivative contracts (Assets)	61	94
Liabilities
Total derivative contracts (Liabilities)	(234)	(83)
Level 1 [Member] \| Interest rate and other [Member]
Assets
Total derivative contracts (Assets)	6	6
Level 1 [Member] \| Collateral and counterparty netting [Member]
Assets
Net derivative contracts (Assets)	(3)	(23)
Liabilities
Net derivative contracts (Liabilities)	3	23
Level 1 [Member] \| Other [Member]
Liabilities
Total derivative contracts (Liabilities)	(2)	(1)
Level 2 [Member]
Assets
Net derivative contracts (Assets)	697	477
Other assets measured at fair value on a recurring basis		49
Total assets measured at fair value on a recurring basis	697	526
Liabilities
Net derivative contracts (Liabilities)	(480)	(605)
Other liabilities measured at fair value on a recurring basis		(2)
Total liabilities measured at fair value on a recurring basis	(480)	(607)
Other fair value measurement disclosures Long-term debt	(6,692)	(8,887)
Level 2 [Member] \| Commodity [Member]
Assets
Total derivative contracts (Assets)	753	445
Liabilities
Total derivative contracts (Liabilities)	(570)	(657)
Level 2 [Member] \| Interest rate and other [Member]
Assets
Total derivative contracts (Assets)	45	86
Level 2 [Member] \| Collateral and counterparty netting [Member]
Assets
Net derivative contracts (Assets)	(101)	(54)
Liabilities
Net derivative contracts (Liabilities)	101	54
Level 2 [Member] \| Other [Member]
Liabilities
Total derivative contracts (Liabilities)	(11)	(2)
Level 3 [Member]
Assets
Net derivative contracts (Assets)	161	240
Other assets measured at fair value on a recurring basis
Total assets measured at fair value on a recurring basis	161	240
Liabilities
Net derivative contracts (Liabilities)	(54)	(97)
Other liabilities measured at fair value on a recurring basis		(2)
Total liabilities measured at fair value on a recurring basis	(54)	(99)
Other fair value measurement disclosures Long-term debt
Level 3 [Member] \| Commodity [Member]
Assets
Total derivative contracts (Assets)	161	243
Liabilities
Total derivative contracts (Liabilities)	(55)	(101)
Level 3 [Member] \| Interest rate and other [Member]
Assets
Total derivative contracts (Assets)	1	1
Level 3 [Member] \| Collateral and counterparty netting [Member]
Assets
Net derivative contracts (Assets)	(1)	(4)
Liabilities
Net derivative contracts (Liabilities)	1	4
Level 3 [Member] \| Other [Member]
Liabilities
Total derivative contracts (Liabilities)
Counterparty netting [Member]
Assets
Net derivative contracts (Assets)	(48)	(191)
Other assets measured at fair value on a recurring basis		(2)
Total assets measured at fair value on a recurring basis	(48)	(193)
Liabilities
Net derivative contracts (Liabilities)	48	191
Other liabilities measured at fair value on a recurring basis		2
Total liabilities measured at fair value on a recurring basis	48	193
Other fair value measurement disclosures Long-term debt
Counterparty netting [Member] \| Commodity [Member]
Assets
Total derivative contracts (Assets)	(48)	(190)
Liabilities
Total derivative contracts (Liabilities)	48	190
Counterparty netting [Member] \| Interest rate and other [Member]
Assets
Total derivative contracts (Assets)		(1)
Counterparty netting [Member] \| Collateral and counterparty netting [Member]
Assets
Net derivative contracts (Assets)
Liabilities
Net derivative contracts (Liabilities)
Counterparty netting [Member] \| Other [Member]
Liabilities
Total derivative contracts (Liabilities)		1
Collateral [Member]
Assets
Net derivative contracts (Assets)	(21)	(34)
Other assets measured at fair value on a recurring basis
Total assets measured at fair value on a recurring basis	(21)	(34)
Liabilities
Net derivative contracts (Liabilities)	141	5
Other liabilities measured at fair value on a recurring basis
Total liabilities measured at fair value on a recurring basis	141	5
Other fair value measurement disclosures Long-term debt
Collateral [Member] \| Commodity [Member]
Assets
Total derivative contracts (Assets)	(21)	(34)
Liabilities
Total derivative contracts (Liabilities)	141	5
Collateral [Member] \| Interest rate and other [Member]
Assets
Total derivative contracts (Assets)
Collateral [Member] \| Collateral and counterparty netting [Member]
Assets
Net derivative contracts (Assets)
Liabilities
Net derivative contracts (Liabilities)
Collateral [Member] \| Other [Member]
Liabilities
Total derivative contracts (Liabilities)

Risk Management and Trading Activities - Fair Values for Corporation's Net Physical Derivative Financial Assets and Liabilities (Parenthetical) (Detail) - USD ($) $ in Millions	Jun. 30, 2013	Dec. 31, 2012
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Total assets measured at fair value on a recurring basis	$ 854	$ 621
Total liabilities measured at fair value on a recurring basis	595	$ 609
Commodity and Interest Rate And Other [Member] \| Corporate risk management activities [Member] \| Level 2 assets [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Total assets measured at fair value on a recurring basis	193
Other [Member] \| Corporate risk management activities [Member] \| Level 2 liabilities [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Total liabilities measured at fair value on a recurring basis	11
Commodity [Member] \| Corporate risk management activities [Member] \| Level 1 assets [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Total assets measured at fair value on a recurring basis	$ 1

Risk Management and Trading Activities - Net Transfers into and out of Each Level of Fair Value Hierarchy (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value measurements net transfers in	$ (18)	$ 155	$ (19)	$ 159
Fair value measurements net transfers out	62	257	62	248
Fair value measurements net transfers into/out of	44	412	43	407
Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value measurements net transfers in	(92)	(342)	(92)	(293)
Fair value measurements net transfers out	19	(138)	18	(157)
Fair value measurements net transfers into/out of	(73)	(480)	(74)	(450)
Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value measurements net transfers in		23	2	50
Fair value measurements net transfers out	29	45	29	(7)
Fair value measurements net transfers into/out of	$ 29	$ 68	$ 31	$ 43

Risk Management and Trading Activities - Changes in Physical Derivative and Financial Assets and Liabilities that are Measured at Fair Value Based on Level 3 Inputs (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Derivative Instruments And Hedging Activities Disclosure [Abstract]
Balance at beginning of period	$ 70	$ (268)	$ 141	$ (143)
Unrealized pre-tax gains (losses)	2	120	(61)	(3)
Purchases	12	10	40	230
Sales	(8)	(23)	(31)	(257)
Settlements	2	180	(13)	217
Transfers into Level 3		23	2	50
Transfers out of Level 3	29	45	29	(7)
Balance at end of period	$ 107	$ 87	$ 107	$ 87

Risk Management and Trading Activities - Changes in Physical Derivative and Financial Assets and Liabilities that are Measured at Fair Value Based on Level 3 Inputs (Parenthetical) (Detail) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2012
Derivative Instruments And Hedging Activities Disclosure [Abstract]
Unrealized pre-tax gains (losses) in other comprehensive income	$ 43	$ 43

Risk Management and Trading Activities - Corporation's Unobservable Inputs Used in Fair Value Measurements (Parenthetical) (Detail) - USD ($) $ in Millions	Jun. 30, 2013	Dec. 31, 2012
Derivative Instruments And Hedging Activities Disclosure [Abstract]
Total derivative contracts (Assets)	$ 161	$ 243
Total derivatives contract (liabilities)	$ 55	$ 101

Risk Management and Trading Activities - Credit Risk - Additional Information (Detail) - USD ($) $ in Millions	Jun. 30, 2013	Dec. 31, 2012
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Cash held from counterparties	$ 21	$ 34
Cash posted to counterparties	141	5
Outstanding letters of credit	593	746
Cash collateral posted for derivatives with contingent collateral provisions	0	0
Additional collateral	145	275
Discontinued Operations [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Net liability related to derivatives with contingent collateral provisions	212	$ 435
Outstanding letters of credit	$ 470
Integrated Oil Companies [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Accounts receivable - Trade	48.00%	23.00%
Financial Institutions [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Accounts receivable - Trade	23.00%
Refiners [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Accounts receivable - Trade	16.00%	15.00%
Government Entities [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Accounts receivable - Trade	10.00%	11.00%
Real Estate [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Accounts receivable - Trade		8.00%
Services [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Accounts receivable - Trade		8.00%
Manufacturing [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Accounts receivable - Trade		6.00%

Subsequent Event - Additional Information (Detail) - USD ($) $ in Millions	1 Months Ended	6 Months Ended
	Jul. 31, 2013	Jun. 30, 2013	Jun. 30, 2012
Subsequent Event [Line Items]
Cash proceeds from asset sales		$ 3,799	$ 132
Subsequent Event [Member] \| Discontinued Downstream Businesses [Member] \| Energy Marketing Business [Member]
Subsequent Event [Line Items]
Cash proceeds from asset sales	$ 1,025

Risk Management and Trading Activities - Corporation's Unobservable Inputs Used in Fair Value Measurements (Detail)	Jun. 30, 2013 $ / bbl $ / MMBTU $ / MWh	Dec. 31, 2012 $ / bbl $ / MMBTU $ / MWh
Minimum [Member] \| Contract prices [Member] \| Crude oil and refined petroleum products [Member] \| Commodity [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Range of measurement of assets for recurring inputs \| $ / bbl	85.41	79.35
Range of measurement of liabilities for recurring inputs \| $ / bbl	92.86	83.49
Minimum [Member] \| Contract prices [Member] \| Electricity [Member] \| Commodity [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Range of measurement of assets for recurring inputs \| $ / MWh	24.87	23.37
Range of measurement of liabilities for recurring inputs \| $ / MWh	29.24	25.01
Minimum [Member] \| Contract prices [Member] \| Natural gas [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Range of measurement of assets for recurring inputs	(1.10)	(0.47)
Range of measurement of liabilities for recurring inputs \| $ / MMBTU	(1.10)	(0.72)
Minimum [Member] \| Contract volatilities [Member] \| Crude oil and refined petroleum products [Member] \| Commodity [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Percentage range of measurement of assets for recurring inputs	16.00%	23.00%
Percentage range of measurement of liabilities for recurring inputs	16.00%	24.00%
Minimum [Member] \| Contract volatilities [Member] \| Electricity [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Percentage range of measurement of assets for recurring inputs	16.00%	18.00%
Minimum [Member] \| Contract volatilities [Member] \| Natural gas [Member] \| Commodity [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Percentage range of measurement of assets for recurring inputs	19.00%	21.00%
Percentage range of measurement of liabilities for recurring inputs	19.50%	21.00%
Maximum [Member] \| Contract prices [Member] \| Crude oil and refined petroleum products [Member] \| Commodity [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Range of measurement of assets for recurring inputs \| $ / bbl	115.59	144.27
Range of measurement of liabilities for recurring inputs \| $ / bbl	116.04	133.38
Maximum [Member] \| Contract prices [Member] \| Electricity [Member] \| Commodity [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Range of measurement of assets for recurring inputs \| $ / MWh	86.36	79.27
Range of measurement of liabilities for recurring inputs \| $ / MWh	82.45	72.60
Maximum [Member] \| Contract prices [Member] \| Natural gas [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Range of measurement of assets for recurring inputs	6.39	6.66
Range of measurement of liabilities for recurring inputs \| $ / MMBTU	6.39	6.66
Maximum [Member] \| Contract volatilities [Member] \| Crude oil and refined petroleum products [Member] \| Commodity [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Percentage range of measurement of assets for recurring inputs	21.00%	27.00%
Percentage range of measurement of liabilities for recurring inputs	21.00%	27.00%
Maximum [Member] \| Contract volatilities [Member] \| Electricity [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Percentage range of measurement of assets for recurring inputs	38.00%	40.00%
Maximum [Member] \| Contract volatilities [Member] \| Natural gas [Member] \| Commodity [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Percentage range of measurement of assets for recurring inputs	32.00%	36.00%
Percentage range of measurement of liabilities for recurring inputs	29.00%	28.00%
Weighted Average [Member] \| Contract prices [Member] \| Crude oil and refined petroleum products [Member] \| Commodity [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Range of measurement of assets for recurring inputs \| $ / bbl	111.66	113.06
Range of measurement of liabilities for recurring inputs \| $ / bbl	112.67	109.94
Weighted Average [Member] \| Contract prices [Member] \| Electricity [Member] \| Commodity [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Range of measurement of assets for recurring inputs \| $ / MWh	47.26	40.81
Range of measurement of liabilities for recurring inputs \| $ / MWh	46.73	40.38
Weighted Average [Member] \| Contract prices [Member] \| Natural gas [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Range of measurement of assets for recurring inputs	0.10	0.39
Range of measurement of liabilities for recurring inputs \| $ / MMBTU	0.06	1.26
Weighted Average [Member] \| Contract volatilities [Member] \| Crude oil and refined petroleum products [Member] \| Commodity [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Percentage range of measurement of assets for recurring inputs	17.00%	26.00%
Percentage range of measurement of liabilities for recurring inputs	17.00%	26.00%
Weighted Average [Member] \| Contract volatilities [Member] \| Electricity [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Percentage range of measurement of assets for recurring inputs	24.00%	28.00%
Weighted Average [Member] \| Contract volatilities [Member] \| Natural gas [Member] \| Commodity [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Percentage range of measurement of assets for recurring inputs	22.00%	25.00%
Percentage range of measurement of liabilities for recurring inputs	20.00%	22.00%