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 Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Net income (loss) attributable to Hess Corporation:
Net income (loss)	$ 185	$ (183)	$ 534	$ (2,812)
Less: Net income (loss) attributable to noncontrolling interests	70	60	240	184
Net Income (Loss) Attributable to Hess Corporation	$ 115	$ (243)	$ 294	$ (2,996)
Weighted average number of common shares outstanding:
Basic (in shares)	308.1	305.0	307.1	304.7
Diluted (in shares)	309.9	305.0	309.1	304.7
Restricted common stock
Weighted average number of common shares outstanding:
Effect of dilutive securities (in shares)	0.6	0.0	0.6	0.0
Stock options
Weighted average number of common shares outstanding:
Effect of dilutive securities (in shares)	0.3	0.0	0.5	0.0
Performance share units
Weighted average number of common shares outstanding:
Effect of dilutive securities (in shares)	0.9	0.0	0.9	0.0