Subsequent Event - Additional Information (Details) - USD ($) $ in Millions	Apr. 30, 2018	Mar. 31, 2018
Subsequent Event [Line Items]
Share repurchase program, amount		$ 1,500
Subsequent Event
Subsequent Event [Line Items]
Accelerated stock repurchase program of common stock	$ 500
Accelerated share repurchases, cash paid	500
Accelerated share repurchases, received of common stock	$ 8
Accelerated share repurchase program, terms	We paid $500 million in cash to the financial institution and received an initial delivery of approximately 8 million shares of our common stock with final settlement expected to be completed during the second quarter.

Accelerated share repurchases of common stock amount.

No definition available.

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- Definition

Accelerated share repurchases received of common stock.

+ References

No definition available.

+ Details

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Namespace Prefix:	hes_
Data Type:	xbrli:monetaryItemType
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- Definition

Description of the nature of the settlement (cash or stock) of the accelerated share repurchases agreement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 30
-Section 25
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=6405686&loc=d3e22802-112653

+ Details

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- Definition

Amount of cash receipt from (payment to) bank; or stock received from (issuance to) bank in the settlement of the accelerated share repurchase agreement.

+ References

+ Details

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- Definition

Amount remaining of a stock repurchase plan authorized.

+ References

No definition available.

+ Details

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- Definition

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

+ References

No definition available.

+ Details

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- Details

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