Retirement Plans - Additional Information (Detail) - USD ($) $ in Millions	9 Months Ended	12 Months Ended
	Sep. 30, 2024	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Defined Benefit Plan Disclosure [Line Items]
Retirement benefits, description			Additionally, we maintain an unfunded post-retirement medical plan that provides health benefits to certain U.S. qualified retirees from ages 55 through 65.
Defined Benefit Plan Plan Assets Premium for Bulk Annuity Purchase	$ 483
Pension prior service cost	$ 35		$ 35	$ 0	$ 0
Settlement loss			0	(17)	(2)
Net periodic benefic cost excluding service cost			(22)	(39)	(114)
Expense for defined contribution plans			$ 29	24	22
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Interest Cost, Statement of Income or Comprehensive Income [Extensible Enumeration]			Other, net
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) Excluding Service Cost, Statement of Income or Comprehensive Income [Extensible Enumeration]			Other, net
Scenario Forecast
Defined Benefit Plan Disclosure [Line Items]
Service costs		$ 50
Net periodic benefic cost excluding service cost		35
Interest costs		105
Expected return on plan assets		(150)
Defined Benefit Plan, Amortization of Gain (Loss)		$ 10
Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Target allocation percentage for plan assets			25.00%
Fixed Income Securities
Defined Benefit Plan Disclosure [Line Items]
Target allocation percentage for plan assets			50.00%
Other Types of Investments
Defined Benefit Plan Disclosure [Line Items]
Target allocation percentage for plan assets			25.00%
Lump sum Payment
Defined Benefit Plan Disclosure [Line Items]
Plan settlements				143
Hess U.K. Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Funded (Unfunded) Status of Plan			$ 78
Unrecognized Net Actuarial (Gains) Losses			221
Interest cost			5
Annuity payments			6
Unrealized gain (loss) due to changes in annuity pricing			26
Foreign currency exchange losses			$ 28
Hess Corporation Employees' Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Settlement loss				$ 17	13
Hess Corporation Employees' Pension Plan | Single Premium Annuity Contract
Defined Benefit Plan Disclosure [Line Items]
Plan settlements					166
Hovensa Legacy Employees' Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Settlement loss					11
Defined Benefit Plan, Benefit Obligation					15
Hovensa Legacy Employees' Pension Plan | Single Premium Annuity Contract
Defined Benefit Plan Disclosure [Line Items]
Plan settlements					80
Hovensa Legacy Employees' Pension Plan | Lump sum Payment
Defined Benefit Plan Disclosure [Line Items]
Plan settlements					$ 20