Outstanding and Weighted Average Common Shares - Net Income (Loss) and Weighted Average Number of Common Shares Used in Computation of Basic and Diluted Earnings Per Share (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Net Income (Loss) Attributable to Hess Corporation Common Stockholders:
Net Income (Loss)	$ (2,839)	$ (240)	$ (115)
Less: Net income (loss) attributable to noncontrolling interests	254	168	167
Less: Preferred stock dividends	0	4	46
Net Income (Loss) Attributable to Hess Corporation Common Stockholders	$ (3,093)	$ (412)	$ (328)
Weighted Average Number of Common Shares Outstanding:
Shares outstanding – Basic (in shares)	304.8	301.2	298.2
Diluted (in shares)	304.8	301.2	298.2
Basic (in dollars per share)	$ (10.15)	$ (1.37)	$ (1.10)
Diluted (in dollars per share)	$ (10.15)	$ (1.37)	$ (1.10)
Restricted Common Stock
Weighted Average Number of Common Shares Outstanding:
Antidilutive shares excluded from computation of diluted shares (in shares)	2.1	2.2	2.9
Stock Options
Weighted Average Number of Common Shares Outstanding:
Antidilutive shares excluded from computation of diluted shares (in shares)	4.3	4.7	5.5
Performance Share Units
Weighted Average Number of Common Shares Outstanding:
Antidilutive shares excluded from computation of diluted shares (in shares)	1.1	1.7	1.1
Common Shares from Conversion of Preferred Stocks
Weighted Average Number of Common Shares Outstanding:
Antidilutive shares excluded from computation of diluted shares (in shares)	0.0	0.0	12.7
Restricted Common Stock
Weighted Average Number of Common Shares Outstanding:
Effect of dilutive securities (in shares)	0.0	0.0	0.0
Stock Options
Weighted Average Number of Common Shares Outstanding:
Effect of dilutive securities (in shares)	0.0	0.0	0.0
Performance Share Units
Weighted Average Number of Common Shares Outstanding:
Effect of dilutive securities (in shares)	0.0	0.0	0.0
Mandatory Convertible Preferred Stock
Weighted Average Number of Common Shares Outstanding:
Effect of dilutive securities (in shares)	0.0	0.0	0.0