Segment Information - Financial Data by Operating Segment (Parenthetical) (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Segment Reporting Information [Line Items]
Net Income (Loss) attributable to Hess Corporation	$ (408)	$ (282)	$ (4,074)
Midstream Segment | Operating Segments
Segment Reporting Information [Line Items]
Net Income (Loss) attributable to Hess Corporation	144	120	42
Midstream Segment | Operating Segments | Pro Forma
Segment Reporting Information [Line Items]
Net Income (Loss) attributable to Hess Corporation		158	73
Exploration and Production | Operating Segments
Segment Reporting Information [Line Items]
Net Income (Loss) attributable to Hess Corporation	$ 53	51	(3,653)
Exploration and Production | Operating Segments | Pro Forma
Segment Reporting Information [Line Items]
Net Income (Loss) attributable to Hess Corporation		$ 13	$ 3,684