Retirement Plans - Change in Benefit Obligation, Fair Value of Plan Assets & Funded Status of Pension Plans & Postretirement Medical Plan (Detail) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2024	Dec. 31, 2023
Change in Fair Value of Plan Assets
Beginning balance	$ 2,445
Ending balance	2,374	$ 2,445
Hess U.K. Pension Plan
Change in Fair Value of Plan Assets
Foreign currency exchange rate changes	28
Funded Status (Plan assets greater (less) than benefit obligations) at December 31,	78
Unrecognized Net Actuarial (Gains) Losses	221
Changes in Discount Rate Assumptions
Change in Benefit Obligation
Actuarial (gains) loss	(191)	56
Change in Fair Value of Plan Assets
Actuarial gains or losses resulted from changes in assumptions	191	(56)
Change in Retirement Rate Assumptions
Change in Benefit Obligation
Actuarial (gains) loss	(59)
Change in Fair Value of Plan Assets
Actuarial gains or losses resulted from changes in assumptions	59
Changes in Withdrawal Rate Assumptions
Change in Benefit Obligation
Actuarial (gains) loss	70
Change in Fair Value of Plan Assets
Actuarial gains or losses resulted from changes in assumptions	(70)
Changes in the Salary Scale Assumptions
Change in Benefit Obligation
Actuarial (gains) loss	55
Change in Fair Value of Plan Assets
Actuarial gains or losses resulted from changes in assumptions	(55)
Updates to Census Data
Change in Benefit Obligation
Actuarial (gains) loss	19	18
Change in Fair Value of Plan Assets
Actuarial gains or losses resulted from changes in assumptions	(19)	(18)
Use of Annuity Pricing to Measure PBO
Change in Benefit Obligation
Actuarial (gains) loss	(26)
Change in Fair Value of Plan Assets
Actuarial gains or losses resulted from changes in assumptions	26
Alignment of PBO to Settlement Payments
Change in Benefit Obligation
Actuarial (gains) loss		(20)
Change in Fair Value of Plan Assets
Actuarial gains or losses resulted from changes in assumptions		20
All Other Assumptions
Change in Benefit Obligation
Actuarial (gains) loss	(30)	(2)
Change in Fair Value of Plan Assets
Actuarial gains or losses resulted from changes in assumptions	30	2
Funded Pension Plans
Change in Benefit Obligation
Beginning balance	1,760	1,802
Service costs	29	26
Interest costs	81	88
Actuarial (gains) loss	(93)	44
Plan settlements	0	143
Benefit payments	(88)	(77)
Plan amendments	35	0
Foreign currency exchange rate changes	(5)	20
Ending balance	1,719	1,760
Change in Fair Value of Plan Assets
Beginning balance	2,445	2,450
Actual return on plan assets	18	186
Employer contributions	3	1
Plan settlements	0	143
Benefit payments	(88)	(77)
Foreign currency exchange rate changes	(4)	28
Ending balance	2,374	2,445
Funded Status (Plan assets greater (less) than benefit obligations) at December 31,	655	685
Unrecognized Net Actuarial (Gains) Losses	372	332
Actuarial gains or losses resulted from changes in assumptions	93	(44)
Accumulated benefit obligation	1,619	1,684
Unfunded Pension Plan
Change in Benefit Obligation
Beginning balance	222	212
Service costs	11	9
Interest costs	10	9
Actuarial (gains) loss	42	7
Plan settlements	0	0
Benefit payments	(6)	(15)
Plan amendments	0	0
Foreign currency exchange rate changes	0	0
Ending balance	279	222
Change in Fair Value of Plan Assets
Beginning balance	0	0
Actual return on plan assets	0	0
Employer contributions	6	15
Plan settlements	0	0
Benefit payments	(6)	(15)
Foreign currency exchange rate changes	0	0
Ending balance	0	0
Funded Status (Plan assets greater (less) than benefit obligations) at December 31,	(279)	(222)
Unrecognized Net Actuarial (Gains) Losses	71	30
Actuarial gains or losses resulted from changes in assumptions	(42)	(7)
Accumulated benefit obligation	182	181
Postretirement Medical Plan
Change in Benefit Obligation
Beginning balance	53	52
Service costs	3	3
Interest costs	3	2
Actuarial (gains) loss	1	1
Plan settlements	0	0
Benefit payments	(4)	(5)
Plan amendments	0	0
Foreign currency exchange rate changes	0	0
Ending balance	56	53
Change in Fair Value of Plan Assets
Beginning balance	0	0
Actual return on plan assets	0	0
Employer contributions	4	5
Plan settlements	0	0
Benefit payments	(4)	(5)
Foreign currency exchange rate changes	0	0
Ending balance	0	0
Funded Status (Plan assets greater (less) than benefit obligations) at December 31,	(56)	(53)
Unrecognized Net Actuarial (Gains) Losses	(23)	(25)
Actuarial gains or losses resulted from changes in assumptions	$ (1)	$ (1)

Amount of actuarial present value of benefits attributed to employee service rendered, excluding assumptions about future compensation level.

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Amount, before tax, of accumulated other comprehensive (income) loss for defined benefit plan, that has not been recognized in net periodic benefit cost (credit).

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Amount of increase (decrease) in plan assets of defined benefit plan from actual return (loss) determined by change in fair value of plan assets adjusted for contributions, benefit payments, and other expenses.

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Amount of gain (loss) from change in actuarial assumptions which (increases) decreases benefit obligation of defined benefit plan. Assumptions include, but are not limited to, interest, mortality, employee turnover, salary, and temporary deviation from substantive plan.

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Amount of actuarial present value of benefits attributed to service rendered by employee for defined benefit plan.

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Amount of payment to participant of defined benefit plan which decreases benefit obligation. For pension plan, payment includes, but is not limited to, pension benefits and death benefits. For other postretirement plan, payment includes, but is not limited to, prescription drug benefits, health care benefits, life insurance benefits, and legal, educational and advisory services.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Amount of contribution received by defined benefit plan from employer which increases plan assets.

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Amount of asset segregated and restricted to provide benefit under defined benefit plan. Asset includes, but is not limited to, stock, bond, other investment, earning from investment, and contribution by employer and employee.

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Amount of foreign currency translation gain (loss) which (increases) decreases benefit obligation of defined benefit plan.

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Amount of funded (unfunded) status of defined benefit plan, measured as difference between fair value of plan assets and benefit obligation. Includes, but is not limited to, overfunded (underfunded) status.

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Amount of cost recognized for passage of time related to defined benefit plan.

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Amount of increase (decrease) in benefit obligation of defined benefit plan from change in terms of existing plan or initiation of new plan.

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Amount of payment to participant under defined benefit plan which decreases plan assets. For pension plan, payment includes, but is not limited to, pension benefits and death benefits. For other postretirement plan, payment includes, but is not limited to, prescription drug benefits, health care benefits, life insurance benefits, and legal, educational and advisory services.

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