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Debt and Interest Expense - Additional Information (Detail) (USD $)
 12 Months Ended 0 Months Ended 1 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Lease
Dec. 31, 2012
Jan. 31, 2015
Jan. 31, 2015
Jun. 30, 2014
Debt Instrument [Line Items]            
New syndicated revolving credit facility maturing in April 2016 $ 4,000,000,000hes_NewSyndicatedRevolvingCreditFacility          
Interest rate on the borrowings on the credit facility description 1.25% above the London Interbank Offered Rate.          
Credit facility fee (per annum) 0.25%us-gaap_LineOfCreditFacilityCommitmentFeePercentage          
Maturity of revolving credit facilities 2016-04          
Unsecured fixed-rate notes           600,000,000us-gaap_UnsecuredDebt
Unsecured fixed-rate notes issued, net of discount           598,000,000hes_DebtInstrumentNetOfDiscount
Repayments of debt 590,000,000us-gaap_RepaymentsOfDebt          
Retirement of various lease obligations 249,000,000hes_RetirementOfVariousLeaseObligations          
Repayments under available credit facilities   2,348,000,000hes_RepaymentsUnderAvailableCreditFacilities        
Capital lease obligations   98,000,000us-gaap_CapitalLeaseObligations        
Acquisition of leased Hess retail gasoline stations   50hes_NumberOfGasolineStationsAcquired        
Total other debt repayments   136,000,000us-gaap_RepaymentsOfOtherDebt        
Fixed-rate notes, principal amount 5,650,000,000hes_FixedRateNotesPrincipleAmount          
Fixed-rate notes, principal amount net of unamortized discount 5,625,000,000hes_FixedRateNotes 5,275,000,000hes_FixedRateNotes        
Weighted average interest rate 6.40%us-gaap_DebtWeightedAverageInterestRate          
Aggregate long-term debt, maturing in 2015 68,000,000us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths          
Aggregate long-term debt, maturing in 2016 71,000,000us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo          
Aggregate long-term debt, maturing in 2017 373,000,000us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree          
Aggregate long-term debt, maturing in 2018 78,000,000us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour          
Aggregate long-term debt, maturing in 2019 1,070,000,000us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive          
Additional secured debt allowed to be borrowed 5,600,000,000hes_AdditionalSecuredDebtAvailable          
Outstanding letters of credit 397,000,000hes_OutstandingLettersOfCredit 410,000,000hes_OutstandingLettersOfCredit        
Letters of credit outstanding, contingent liabilities 54,000,000us-gaap_LettersOfCreditOutstandingAmount          
Letters of credit outstanding, balance sheet liabilities 343,000,000hes_LettersOfCreditOutstandingBalanceSheetLiabilities          
Interest paid, net of amounts capitalized 326,000,000us-gaap_InterestPaidNet 408,000,000us-gaap_InterestPaidNet 419,000,000us-gaap_InterestPaidNet      
Capitalized interest 76,000,000us-gaap_InterestPaidCapitalized 60,000,000us-gaap_InterestPaidCapitalized 28,000,000us-gaap_InterestPaidCapitalized      
Revolving Credit Facility [Member]            
Debt Instrument [Line Items]            
Repayments under available credit facilities   758,000,000hes_RepaymentsUnderAvailableCreditFacilities
/ us-gaap_CreditFacilityAxis
= us-gaap_RevolvingCreditFacilityMember		        
Short-term Credit Facilities [Member]            
Debt Instrument [Line Items]            
Repayments under available credit facilities   990,000,000hes_RepaymentsUnderAvailableCreditFacilities
/ us-gaap_CreditFacilityAxis
= hes_ShortTermCreditFacilityMember		        
Asset-Backed Credit Facility [Member]            
Debt Instrument [Line Items]            
Repayments under available credit facilities   600,000,000hes_RepaymentsUnderAvailableCreditFacilities
/ us-gaap_CreditFacilityAxis
= us-gaap_AssetBackedSecuritiesMember		        
WilcoHess [Member]            
Debt Instrument [Line Items]            
Repayments of debt 74,000,000us-gaap_RepaymentsOfDebt
/ us-gaap_BusinessAcquisitionAxis
= hes_WilcohessMember		          
Leased Floating Production System [Member]            
Debt Instrument [Line Items]            
Additional non-cash debt 68,000,000us-gaap_LiabilitiesAssumed1
/ us-gaap_LongtermDebtTypeAxis
= hes_LeasedFloatingProductionSystemAtTubularBellsProjectMember		 116,000,000us-gaap_LiabilitiesAssumed1
/ us-gaap_LongtermDebtTypeAxis
= hes_LeasedFloatingProductionSystemAtTubularBellsProjectMember		        
1.3% Due 2017 [Member]            
Debt Instrument [Line Items]            
Unsecured fixed-rate notes           300,000,000us-gaap_UnsecuredDebt
/ us-gaap_DebtInstrumentAxis
= hes_OnePointThreePercentageDueTwoThousandSeventeenMember
Debt notes maturity period Jun. 30, 2017          
Fixed-rate notes, principal amount net of unamortized discount 300,000,000hes_FixedRateNotes
/ us-gaap_DebtInstrumentAxis
= hes_OnePointThreePercentageDueTwoThousandSeventeenMember		          
3.5% Due 2024 [Member]            
Debt Instrument [Line Items]            
Unsecured fixed-rate notes           300,000,000us-gaap_UnsecuredDebt
/ us-gaap_DebtInstrumentAxis
= hes_ThreePointFivePercentageDueTwoThousandTwentyFourMember
Debt notes maturity period Jul. 31, 2024          
Fixed-rate notes, principal amount net of unamortized discount 298,000,000hes_FixedRateNotes
/ us-gaap_DebtInstrumentAxis
= hes_ThreePointFivePercentageDueTwoThousandTwentyFourMember		          
Unsecured Fixed-Rate Notes [Member]            
Debt Instrument [Line Items]            
Repayments of debt $ 250,000,000us-gaap_RepaymentsOfDebt
/ us-gaap_DebtInstrumentAxis
= hes_UnsecuredFixedRateNotesMember		          
Subsequent Event            
Debt Instrument [Line Items]            
Interest rate on the borrowings on the credit facility description         1.075% above the London Interbank Offered Rate  
Credit facility fee (per annum)         0.175%us-gaap_LineOfCreditFacilityCommitmentFeePercentage
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember		  
Maturity of revolving credit facilities         2020-01  
Credit agreement term       5 years