Segment Information - Financial Data by Operating Segment (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Segment Reporting Information [Line Items]
Sales and other operating revenues	$ 1,579	$ 833	$ 3,477	$ 2,187
Net Income (Loss) attributable to Hess Corporation	(73)	(320)	179	(2,753)
Depreciation, depletion and amortization	385	509	781	1,070
Impairment and other	147	0	147	2,126
Provision (benefit) for income taxes	122	(9)	245	(88)
Capital Expenditures	443	507	746	1,173
Assets	19,166		19,166		$ 18,821
Exploration and Production
Segment Reporting Information [Line Items]
Sales and other operating revenues	1,579	833	3,477	2,187
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	1,579	833	3,477	2,187
Net Income (Loss) attributable to Hess Corporation	(25)	(249)	283	(2,620)
Depreciation, depletion and amortization	344	470	699	991
Impairment and other	147		147	2,126
Provision (benefit) for income taxes	119	(11)	239	(88)
Capital Expenditures	396	428	676	1,037
Assets	13,753		13,753		13,688
Operating Segments | Midstream
Segment Reporting Information [Line Items]
Sales and other operating revenues	294	270	583	561
Net Income (Loss) attributable to Hess Corporation	76	51	151	112
Depreciation, depletion and amortization	41	39	81	77
Impairment and other	0		0	0
Provision (benefit) for income taxes	3	2	6	4
Capital Expenditures	47	79	70	136
Assets	3,587		3,587		3,599
Corporate, Interest and Other
Segment Reporting Information [Line Items]
Net Income (Loss) attributable to Hess Corporation	(124)	(122)	(255)	(245)
Depreciation, depletion and amortization	0	0	1	2
Impairment and other	0		0	0
Provision (benefit) for income taxes	0	0	0	(4)
Capital Expenditures	0	0	0	0
Assets	1,826		1,826		$ 1,534
Eliminations
Segment Reporting Information [Line Items]
Sales and other operating revenues	(294)	(270)	(583)	(561)
Net Income (Loss) attributable to Hess Corporation	0	0	0	0
Depreciation, depletion and amortization	0	0	0	0
Impairment and other	0		0	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	$ 294	$ 270	$ 583	$ 561