Statement of Consolidated Comprehensive Income - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Statement Of Income And Comprehensive Income [Abstract]
Net Income (Loss)	$ (166)	$ 3	$ (57)	$ (149)
Derivatives designated as cash flow hedges
Effect of hedge (gains) losses reclassified to income	(2)	49	(3)	129
Income taxes on effect of hedge (gains) losses reclassified to income	0	0	0	0
Net effect of hedge (gains) losses reclassified to income	(2)	49	(3)	129
Change in fair value of cash flow hedges	12	(49)	(334)	(84)
Income taxes on change in fair value of cash flow hedges	0	12	0	12
Net change in fair value of cash flow hedges	12	(37)	(334)	(72)
Change in derivatives designated as cash flow hedges, after taxes	10	12	(337)	57
Pension and other postretirement plans
(Increase) reduction in unrecognized actuarial losses	(239)	0	(257)	130
Income taxes on actuarial changes in plan liabilities	0	0	0	(31)
(Increase) reduction in unrecognized actuarial losses, net	(239)	0	(257)	99
Amortization of net actuarial losses	101	8	124	29
Income taxes on amortization of net actuarial losses	0	0	0	0
Net effect of amortization of net actuarial losses	101	8	124	29
Change in pension and other postretirement plans, after taxes	(138)	8	(133)	128
Other Comprehensive Income (Loss)	(128)	20	(470)	185
Comprehensive Income (Loss)	(294)	23	(527)	36
Less: Comprehensive income (loss) attributable to noncontrolling interests	46	45	129	129
Comprehensive Income (Loss) Attributable to Hess Corporation	$ (340)	$ (22)	$ (656)	$ (93)