Name:	hes_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisNetAssetLiabilitiesPurchases
Namespace Prefix:	hes_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Sales that have taken place during the period in relation to net assets/liabilities measured at fair value and categorized within the fair value hierarchy .

No definition available.

Name:	hes_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisNetAssetsLiabilitiesSales
Namespace Prefix:	hes_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Settlements that have taken place during the period in relation to net assets/liabilities measured at fair value and categorized within the fair value hierarchy .

No definition available.

Name:	hes_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisNetAssetsLiabilitiesSettlements
Namespace Prefix:	hes_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Financial assets and liabilities measured at fair value based on level 3 inputs.

No definition available.

Name:	hes_FinancialAssetsAndLiabilitiesMeasuredAtFairValue
Namespace Prefix:	hes_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

This element represents (net) transfers into assets and liabilities measured at fair value on a recurring basis using unobservable inputs (Level 3) which have taken place during the period.

No definition available.

Name:	hes_TransfersIntoLevelThree
Namespace Prefix:	hes_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

This element represents (net) transfers out of assets and liabilities measured at fair value on a recurring basis using unobservable inputs (Level 3) which have taken place during the period.

No definition available.

Name:	hes_TransfersOutOfLevelThree
Namespace Prefix:	hes_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

This element represents total gains or losses for the period (realized and unrealized), arising from assets and liabilities measured at fair value on a recurring basis using unobservable inputs (Level 3), which are included in earnings.

No definition available.

Name:	hes_UnrealizedGainsLossesIncludedInEarnings
Namespace Prefix:	hes_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

No definition available.