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

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
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Period Type:	duration

Segment Information - Financial Data by Operating Segment (Parenthetical) (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Segment Reporting Information [Line Items]
Net Income (Loss) attributable to Hess Corporation	$ (6)	$ (130)	$ 26	$ (236)
Midstream Segment \| Operating Segments
Segment Reporting Information [Line Items]
Net Income (Loss) attributable to Hess Corporation	35	30	72	58
Midstream Segment \| Operating Segments \| Pro Forma
Segment Reporting Information [Line Items]
Net Income (Loss) attributable to Hess Corporation		39		76
Exploration and Production \| Operating Segments
Segment Reporting Information [Line Items]
Net Income (Loss) attributable to Hess Corporation	$ 68	31	$ 177	6
Exploration and Production \| Operating Segments \| Pro Forma
Segment Reporting Information [Line Items]
Net Income (Loss) attributable to Hess Corporation		$ 22		$ (12)