Segment Information - Financial Information by Major Geographic Area (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Segment Reporting Information [Line Items]
Sales and other operating revenues	$ 4,667	$ 6,495	$ 6,323
Property, Plant and Equipment, Net	14,115	16,814
Hess Midstream LP
Segment Reporting Information [Line Items]
Property, Plant and Equipment, Net	3,111	3,010
Exploration and Production
Segment Reporting Information [Line Items]
Sales and other operating revenues	4,667	6,495	6,323
Property, Plant and Equipment, Net	7,273	9,172
Operating Segments | Exploration and Production
Segment Reporting Information [Line Items]
Sales and other operating revenues	4,667	6,495	6,323
Corporate, Interest and Other
Segment Reporting Information [Line Items]
Sales and other operating revenues	0	0	0
Property, Plant and Equipment, Net	11	12
United States | Operating Segments
Segment Reporting Information [Line Items]
Sales and other operating revenues	3,604	5,043	4,842
Property, Plant and Equipment, Net	10,384	12,182
United States | Operating Segments | Exploration and Production
Segment Reporting Information [Line Items]
Sales and other operating revenues	3,604	5,043	4,842
Guyana | Operating Segments
Segment Reporting Information [Line Items]
Sales and other operating revenues	350	0	0
Property, Plant and Equipment, Net	2,114	1,507
Guyana | Operating Segments | Exploration and Production
Segment Reporting Information [Line Items]
Sales and other operating revenues	350	0	0
Malaysia and JDA | Operating Segments
Segment Reporting Information [Line Items]
Sales and other operating revenues	511	762	769
Property, Plant and Equipment, Net	1,067	1,890
Other | Operating Segments
Segment Reporting Information [Line Items]
Sales and other operating revenues	202	690	712
Property, Plant and Equipment, Net	539	1,223
Other | Operating Segments | Exploration and Production
Segment Reporting Information [Line Items]
Sales and other operating revenues	$ 202	$ 690	$ 712