XML 18 R112.htm IDEA: XBRL DOCUMENT v2.4.1.9
Financial Risk Management and Trading Activities - Gross Volumes of Corporation's Derivative Contracts Outstanding (Detail) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Interest rate swap [Member]    
Derivative [Line Items]    
Derivative notional amount $ 1,300invest_DerivativeNotionalAmount
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_InterestRateSwapMember		 $ 865invest_DerivativeNotionalAmount
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_InterestRateSwapMember
Gross Volumes of the Financial Risk Management Derivative Contracts Outstanding [Member] | Foreign Exchange [Member]    
Derivative [Line Items]    
Derivative notional amount 1,189invest_DerivativeNotionalAmount
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_ForeignExchangeMember
/ us-gaap_TradingActivityByTypeAxis
= hes_FinancialRiskManagementDerivativeInstrumentsMember		 220invest_DerivativeNotionalAmount
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_ForeignExchangeMember
/ us-gaap_TradingActivityByTypeAxis
= hes_FinancialRiskManagementDerivativeInstrumentsMember
Gross Volumes of the Financial Risk Management Derivative Contracts Outstanding [Member] | Interest rate swap [Member]    
Derivative [Line Items]    
Derivative notional amount 1,300invest_DerivativeNotionalAmount
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_InterestRateSwapMember
/ us-gaap_TradingActivityByTypeAxis
= hes_FinancialRiskManagementDerivativeInstrumentsMember		 865invest_DerivativeNotionalAmount
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_InterestRateSwapMember
/ us-gaap_TradingActivityByTypeAxis
= hes_FinancialRiskManagementDerivativeInstrumentsMember
Gross Volumes of the Financial Risk Management Derivative Contracts Outstanding [Member] | Commodity, Primarily Crude Oil (Millions of Barrels) [Member]    
Derivative [Line Items]    
Absolute volume of derivative commodity contracts   9invest_DerivativeNonmonetaryNotionalAmount
/ us-gaap_DerivativeByNatureAxis
= hes_CommodityPrimarilyCrudeOilMember
/ us-gaap_TradingActivityByTypeAxis
= hes_FinancialRiskManagementDerivativeInstrumentsMember
Gross Volumes of Derivative Contracts Outstanding Relating to Trading Activities [Member] | Foreign Exchange [Member]    
Derivative [Line Items]    
Derivative notional amount 77invest_DerivativeNotionalAmount
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_ForeignExchangeMember
/ us-gaap_TradingActivityByTypeAxis
= hes_GrossVolumeOfDerivativeInstrumentsOutstandingRelatingToTradingActivitiesMember		 52invest_DerivativeNotionalAmount
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_ForeignExchangeMember
/ us-gaap_TradingActivityByTypeAxis
= hes_GrossVolumeOfDerivativeInstrumentsOutstandingRelatingToTradingActivitiesMember
Gross Volumes of Derivative Contracts Outstanding Relating to Trading Activities [Member] | Interest rate swap [Member]    
Derivative [Line Items]    
Derivative notional amount $ 29invest_DerivativeNotionalAmount
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_InterestRateSwapMember
/ us-gaap_TradingActivityByTypeAxis
= hes_GrossVolumeOfDerivativeInstrumentsOutstandingRelatingToTradingActivitiesMember		  
Gross Volumes of Derivative Contracts Outstanding Relating to Trading Activities [Member] | Crude Oil and Refined Petroleum Products [Member]    
Derivative [Line Items]    
Absolute volume of derivative commodity contracts 1,396invest_DerivativeNonmonetaryNotionalAmount
/ us-gaap_DerivativeByNatureAxis
= hes_CrudeOilAndRefinedPetroleumProductsMember
/ us-gaap_TradingActivityByTypeAxis
= hes_GrossVolumeOfDerivativeInstrumentsOutstandingRelatingToTradingActivitiesMember		 1,815invest_DerivativeNonmonetaryNotionalAmount
/ us-gaap_DerivativeByNatureAxis
= hes_CrudeOilAndRefinedPetroleumProductsMember
/ us-gaap_TradingActivityByTypeAxis
= hes_GrossVolumeOfDerivativeInstrumentsOutstandingRelatingToTradingActivitiesMember
Gross Volumes of Derivative Contracts Outstanding Relating to Trading Activities [Member] | Natural Gas (Millions of mcf) [Member]    
Derivative [Line Items]    
Absolute volume of derivative commodity contracts 2,224invest_DerivativeNonmonetaryNotionalAmount
/ us-gaap_DerivativeByNatureAxis
= us-gaap_NaturalGasReservesMember
/ us-gaap_TradingActivityByTypeAxis
= hes_GrossVolumeOfDerivativeInstrumentsOutstandingRelatingToTradingActivitiesMember		 2,735invest_DerivativeNonmonetaryNotionalAmount
/ us-gaap_DerivativeByNatureAxis
= us-gaap_NaturalGasReservesMember
/ us-gaap_TradingActivityByTypeAxis
= hes_GrossVolumeOfDerivativeInstrumentsOutstandingRelatingToTradingActivitiesMember
Gross Volumes of Derivative Contracts Outstanding Relating to Trading Activities [Member] | Electricity (Millions of megawatt hours)[Member]    
Derivative [Line Items]    
Absolute volume of derivative commodity contracts 1invest_DerivativeNonmonetaryNotionalAmount
/ us-gaap_DerivativeByNatureAxis
= hes_ElectricityMember
/ us-gaap_TradingActivityByTypeAxis
= hes_GrossVolumeOfDerivativeInstrumentsOutstandingRelatingToTradingActivitiesMember		 1invest_DerivativeNonmonetaryNotionalAmount
/ us-gaap_DerivativeByNatureAxis
= hes_ElectricityMember
/ us-gaap_TradingActivityByTypeAxis
= hes_GrossVolumeOfDerivativeInstrumentsOutstandingRelatingToTradingActivitiesMember
Gross Volumes of Derivative Contracts Outstanding Relating to Trading Activities [Member] | Equity Securities (Millions of Shares) [Member]    
Derivative [Line Items]    
Equity securities 5hes_DerivativeEquitySecuritiesNotionalAmount
/ us-gaap_DerivativeByNatureAxis
= hes_EquitySecuritiesNumberOfSharesMember
/ us-gaap_TradingActivityByTypeAxis
= hes_GrossVolumeOfDerivativeInstrumentsOutstandingRelatingToTradingActivitiesMember		 11hes_DerivativeEquitySecuritiesNotionalAmount
/ us-gaap_DerivativeByNatureAxis
= hes_EquitySecuritiesNumberOfSharesMember
/ us-gaap_TradingActivityByTypeAxis
= hes_GrossVolumeOfDerivativeInstrumentsOutstandingRelatingToTradingActivitiesMember