Segment Information - Financial Data by Operating Segment (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Segment Reporting Information [Line Items]
Sales and other operating revenues	$ 1,898	$ 1,354
Net Income (Loss) attributable to Hess Corporation	252	(2,433)
Depreciation, depletion and amortization	396	561
Impairment		2,126
Provision (benefit) for income taxes	123	(79)
Capital Expenditures	303	666
Assets	18,951		$ 18,821
Exploration and Production
Segment Reporting Information [Line Items]
Sales and other operating revenues	1,898	1,354
Midstream
Segment Reporting Information [Line Items]
Sales and other operating revenues	0	0
Operating Segments | Exploration and Production
Segment Reporting Information [Line Items]
Sales and other operating revenues	1,898	1,354
Net Income (Loss) attributable to Hess Corporation	308	(2,371)
Depreciation, depletion and amortization	355	521
Impairment		2,126
Provision (benefit) for income taxes	120	(77)
Capital Expenditures	280	609
Assets	13,764		13,688
Operating Segments | Midstream
Segment Reporting Information [Line Items]
Sales and other operating revenues	289	291
Net Income (Loss) attributable to Hess Corporation	75	61
Depreciation, depletion and amortization	40	38
Impairment		0
Provision (benefit) for income taxes	3	2
Capital Expenditures	23	57
Assets	3,586		3,599
Corporate, Interest and Other
Segment Reporting Information [Line Items]
Net Income (Loss) attributable to Hess Corporation	(131)	(123)
Depreciation, depletion and amortization	1	2
Impairment		0
Provision (benefit) for income taxes	0	(4)
Capital Expenditures	0	0
Assets	1,601		$ 1,534
Eliminations
Segment Reporting Information [Line Items]
Sales and other operating revenues	(289)	(291)
Net Income (Loss) attributable to Hess Corporation	0	0
Depreciation, depletion and amortization	0	0
Impairment		0
Provision (benefit) for income taxes	0	0
Capital Expenditures	0	0
Eliminations | Exploration and Production
Segment Reporting Information [Line Items]
Sales and other operating revenues	0	0
Eliminations | Midstream
Segment Reporting Information [Line Items]
Sales and other operating revenues	$ 289	$ 291