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, 2023	Dec. 31, 2022
Change in Fair Value of Plan Assets
Beginning balance	$ 2,450
Ending balance	2,445	$ 2,450
Changes in Discount Rate Assumptions
Change in Benefit Obligation
Actuarial (gains) loss	(56)	(874)
Change in Fair Value of Plan Assets
Actuarial gains or losses resulted from changes in assumptions	56	874
Updates to Census Data
Change in Benefit Obligation
Actuarial (gains) loss	(18)
Change in Fair Value of Plan Assets
Actuarial gains or losses resulted from changes in assumptions	18
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
Changes in Mortality Assumptions
Change in Benefit Obligation
Actuarial (gains) loss		(8)
Change in Fair Value of Plan Assets
Actuarial gains or losses resulted from changes in assumptions		8
All Other Assumptions
Change in Benefit Obligation
Actuarial (gains) loss	(2)	(3)
Change in Fair Value of Plan Assets
Actuarial gains or losses resulted from changes in assumptions	2	3
Funded Pension Plans
Change in Benefit Obligation
Beginning balance	1,802	2,948
Service cost	26	33
Interest cost	88	66
Actuarial (gains) loss	44	(818)
Plan settlements	143	266
Benefit payments	(77)	(90)
Foreign currency exchange rate changes	20	(71)
Ending balance	1,760	1,802
Change in Fair Value of Plan Assets
Beginning balance	2,450	3,357
Actual return on plan assets	186	(469)
Employer contributions	1	1
Plan settlements	143	266
Benefit payments	(77)	(90)
Foreign currency exchange rate changes	28	(83)
Ending balance	2,445	2,450
Funded Status (Plan assets greater (less) than benefit obligations) at December 31,	685	648
Unrecognized Net Actuarial (Gains) Losses (c)	332	337
Actuarial gains or losses resulted from changes in assumptions	(44)	818
Accumulated benefit obligation	1,684	1,743
Funded Pension Plans \| Hess U.K. Pension Plan
Change in Fair Value of Plan Assets
Unrecognized Net Actuarial (Gains) Losses (c)	179	175
Unfunded Pension Plan
Change in Benefit Obligation
Beginning balance	212	248
Service cost	9	11
Interest cost	9	3
Actuarial (gains) loss	7	(38)
Plan settlements	0	0
Benefit payments	(15)	(12)
Foreign currency exchange rate changes	0	0
Ending balance	222	212
Change in Fair Value of Plan Assets
Beginning balance	0	0
Actual return on plan assets	0	0
Employer contributions	15	12
Plan settlements	0	0
Benefit payments	(15)	(12)
Foreign currency exchange rate changes	0	0
Ending balance	0	0
Funded Status (Plan assets greater (less) than benefit obligations) at December 31,	(222)	(212)
Unrecognized Net Actuarial (Gains) Losses (c)	30	23
Actuarial gains or losses resulted from changes in assumptions	(7)	38
Accumulated benefit obligation	181	180
Postretirement Medical Plan
Change in Benefit Obligation
Beginning balance	52	59
Service cost	3	3
Interest cost	2	1
Actuarial (gains) loss	1	(7)
Plan settlements	0	0
Benefit payments	(5)	(4)
Foreign currency exchange rate changes	0	0
Ending balance	53	52
Change in Fair Value of Plan Assets
Beginning balance	0	0
Actual return on plan assets	0	0
Employer contributions	5	4
Plan settlements	0	0
Benefit payments	(5)	(4)
Foreign currency exchange rate changes	0	0
Ending balance	0	0
Funded Status (Plan assets greater (less) than benefit obligations) at December 31,	(53)	(52)
Unrecognized Net Actuarial (Gains) Losses (c)	(25)	(27)
Actuarial gains or losses resulted from changes in assumptions	$ (1)	$ 7

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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Amount of payment, which decreases benefit obligation of defined benefit plan, for irrevocable action relieving primary responsibility for benefit obligation and eliminating risk for obligation and assets used to effect settlement. Transaction constituting settlement includes, but is not limited to, making lump-sum cash payment to participant in exchange for their rights to receive specified benefits and purchasing nonparticipating annuity contract. Excludes decreases to benefit obligation for remeasurement due to settlement.

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

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