Segment Information - Financial Data by Operating Segment (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Segment Reporting Information [Line Items]
Sales and other operating revenues	$ 833	$ 1,660	$ 2,187	$ 3,232
Net Income (Loss) attributable to Hess Corporation	(320)	(6)	(2,753)	26
Depreciation, depletion and amortization	509	494	1,070	992
Impairment			2,126
Provision (benefit) for income taxes	(9)	132	(88)	226
Capital Expenditures	507	694	1,173	1,336
Assets	19,546		19,546		$ 21,782
Exploration and Production
Segment Reporting Information [Line Items]
Sales and other operating revenues	833	1,660	2,187	3,232
Midstream
Segment Reporting Information [Line Items]
Sales and other operating revenues	0	0	0	0
Operating Segments | Exploration and Production
Segment Reporting Information [Line Items]
Sales and other operating revenues	833	1,660	2,187	3,232
Net Income (Loss) attributable to Hess Corporation	(249)	68	(2,620)	177
Depreciation, depletion and amortization	470	459	991	923
Impairment			2,126
Provision (benefit) for income taxes	(11)	131	(88)	226
Capital Expenditures	428	625	1,037	1,140
Assets	14,267		14,267		16,790
Operating Segments | Midstream
Segment Reporting Information [Line Items]
Sales and other operating revenues	270	190	561	380
Net Income (Loss) attributable to Hess Corporation	51	35	112	72
Depreciation, depletion and amortization	39	35	77	69
Impairment			0
Provision (benefit) for income taxes	2	0	4	0
Capital Expenditures	79	69	136	196
Assets	3,550		3,550		3,499
Corporate, Interest and Other
Segment Reporting Information [Line Items]
Net Income (Loss) attributable to Hess Corporation	(122)	(109)	(245)	(223)
Depreciation, depletion and amortization	0	0	2	0
Impairment			0
Provision (benefit) for income taxes	0	1	(4)	0
Capital Expenditures	0	0	0	0
Assets	1,729		1,729		$ 1,493
Eliminations
Segment Reporting Information [Line Items]
Sales and other operating revenues	(270)	(190)	(561)	(380)
Net Income (Loss) attributable to Hess Corporation	0	0	0	0
Depreciation, depletion and amortization	0	0	0	0
Impairment			0
Provision (benefit) for income taxes	0	0	0	0
Capital Expenditures	0	0	0	0
Eliminations | Exploration and Production
Segment Reporting Information [Line Items]
Sales and other operating revenues	0	0	0	0
Eliminations | Midstream
Segment Reporting Information [Line Items]
Sales and other operating revenues	$ 270	$ 190	$ 561	$ 380