Segment Information - Financial Data by Operating Segment (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Segment Reporting Information [Line Items]
Sales and other operating revenues - third-parties	$ 1,793	$ 1,348	$ 4,673	$ 3,803
Total sales and other operating revenues	1,793	1,348	4,673	3,803
Net Income (Loss) attributable to Hess Corporation	(42)	(624)	(278)	(1,397)
Depreciation, depletion and amortization	489	759	1,350	2,237
Impairment	0	2,503	0	2,503
Provision (benefit) for income taxes	121	(1,974)	308	(1,995)
Capital Expenditures	583	553	1,544	1,426
Identifiable assets	21,467		21,467		$ 23,112
Eliminations
Segment Reporting Information [Line Items]
Intersegment revenues	(184)	(153)	(527)	(454)
Total sales and other operating revenues	(184)	(153)	(527)	(454)
Exploration and Production
Segment Reporting Information [Line Items]
Total sales and other operating revenues	1,793		4,673
Exploration and Production | Operating Segments
Segment Reporting Information [Line Items]
Sales and other operating revenues - third-parties	1,793	1,347	4,673	3,797
Total sales and other operating revenues	1,793	1,347	4,673	3,797
Net Income (Loss) attributable to Hess Corporation	50	(474)	56	(1,061)
Depreciation, depletion and amortization	457	709	1,249	2,120
Impairment		2,503		2,503
Provision (benefit) for income taxes	100	(1,969)	300	(2,003)
Capital Expenditures	500	526	1,340	1,351
Identifiable assets	16,387		16,387		15,613
Midstream
Segment Reporting Information [Line Items]
Total sales and other operating revenues	184		527
Midstream | Operating Segments
Segment Reporting Information [Line Items]
Sales and other operating revenues - third-parties		1		6
Intersegment revenues	184	153	527	454
Total sales and other operating revenues	184	154	527	460
Net Income (Loss) attributable to Hess Corporation	30	(12)	88	22
Depreciation, depletion and amortization	32	29	94	93
Provision (benefit) for income taxes	10	(3)	28	18
Capital Expenditures	83	27	204	75
Identifiable assets	3,540		3,540		3,329
Corporate, Interest and Other | Operating Segments
Segment Reporting Information [Line Items]
Net Income (Loss) attributable to Hess Corporation	(122)	(138)	(422)	(358)
Depreciation, depletion and amortization		21	7	24
Provision (benefit) for income taxes	11	$ (2)	(20)	$ (10)
Identifiable assets	$ 1,540		$ 1,540		$ 4,170