Segment Information - Financial Data by Operating Segment (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Segment Reporting Information [Line Items]
Sales and other operating revenues	$ 1,759	$ 1,159	$ 5,236	$ 3,346
Net Income (Loss) attributable to Hess Corporation	115	(243)	294	(2,996)
Depreciation, depletion and amortization	349	518	1,130	1,588
Impairment and other	0	0	147	2,126
Provision (benefit) for income taxes	143	5	388	(83)
Capital Expenditures	528	367	1,274	1,540
Assets	19,490		19,490		$ 18,821
Exploration and Production
Segment Reporting Information [Line Items]
Sales and other operating revenues	1,759	1,159	5,236	3,346
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	1,759	1,159	5,236	3,346
Net Income (Loss) attributable to Hess Corporation	178	(182)	461	(2,802)
Depreciation, depletion and amortization	308	478	1,007	1,469
Impairment and other			147	2,126
Provision (benefit) for income taxes	140	6	379	(82)
Capital Expenditures	469	301	1,145	1,338
Assets	13,648		13,648		13,688
Operating Segments | Midstream
Segment Reporting Information [Line Items]
Sales and other operating revenues	304	264	887	825
Net Income (Loss) attributable to Hess Corporation	61	56	212	168
Depreciation, depletion and amortization	41	40	122	117
Impairment and other			0	0
Provision (benefit) for income taxes	3	1	9	5
Capital Expenditures	59	66	129	202
Assets	3,627		3,627		3,599
Corporate, Interest and Other
Segment Reporting Information [Line Items]
Net Income (Loss) attributable to Hess Corporation	(124)	(117)	(379)	(362)
Depreciation, depletion and amortization	0	0	1	2
Impairment and other			0	0
Provision (benefit) for income taxes	0	(2)	0	(6)
Capital Expenditures	0	0	0	0
Assets	2,215		2,215		$ 1,534
Eliminations
Segment Reporting Information [Line Items]
Sales and other operating revenues	(304)	(264)	(887)	(825)
Net Income (Loss) attributable to Hess Corporation	0	0	0	0
Depreciation, depletion and amortization	0	0	0	0
Impairment and other			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	$ 304	$ 264	$ 887	$ 825