Retirement Plans - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2019
Defined Benefit Plan Disclosure [Line Items]
Corporation's estimated contribution for funded pension plans in 2019	$ 40		$ 40
Corporation's contribution for funded pension plan during the year to date			20
Settlement loss	88	$ 0	88	$ 0
Service cost	12	10	33	34
Interest cost	23	24	71	71
Amortization of unrecognized net actuarial losses	13	8	36	29
Expected return on plan assets	45	$ 49	135	$ 147
Scenario Forecast
Defined Benefit Plan Disclosure [Line Items]
Service cost					$ 45
Interest cost					90
Amortization of unrecognized net actuarial losses					50
Expected return on plan assets					$ 180
Hess Corporation Employees’ Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Settlement loss	88		88
Single premium annuity contract cost	250		250
Net increase in post retirement plan liabilities	$ 239		$ 239