Statement of Consolidated Comprehensive Income - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Statement Of Income And Comprehensive Income [Abstract]
Net Income (Loss)	$ 34	$ (87)	$ 109	$ (152)
Derivatives designated as cash flow hedges
Effect of hedge (gains) losses reclassified to income	14	49	(1)	80
Income taxes on effect of hedge (gains) losses reclassified to income	0	0	0	0
Net effect of hedge (gains) losses reclassified to income	14	49	(1)	80
Change in fair value of cash flow hedges	0	(13)	(346)	(35)
Income taxes on change in fair value of cash flow hedges	0	0	0	0
Net change in fair value of cash flow hedges	0	(13)	(346)	(35)
Change in derivatives designated as cash flow hedges, after taxes	14	36	(347)	45
Pension and other postretirement plans
(Increase) reduction in unrecognized actuarial losses	(24)	5	(18)	130
Income taxes on actuarial changes in plan liabilities	0	(1)	0	(31)
(Increase) reduction in unrecognized actuarial losses, net	(24)	4	(18)	99
Amortization of net actuarial losses	12	9	23	21
Income taxes on amortization of net actuarial losses	0	0	0	0
Net effect of amortization of net actuarial losses	12	9	23	21
Change in pension and other postretirement plans, after taxes	(12)	13	5	120
Other Comprehensive Income (Loss)	2	49	(342)	165
Comprehensive Income (Loss)	36	(38)	(233)	13
Less: Comprehensive income (loss) attributable to noncontrolling interests	40	43	83	84
Comprehensive Income (Loss) Attributable to Hess Corporation	$ (4)	$ (81)	$ (316)	$ (71)