Statement of Consolidated Comprehensive Income - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Statement Of Income And Comprehensive Income [Abstract]
Net Income (Loss)	$ 75	$ (65)
Derivatives designated as cash flow hedges
Effect of hedge (gains) losses reclassified to income	(15)	31
Income taxes on effect of hedge (gains) losses reclassified to income	0	0
Net effect of hedge (gains) losses reclassified to income	(15)	31
Change in fair value of cash flow hedges	(346)	(22)
Income taxes on change in fair value of cash flow hedges	0	0
Net change in fair value of cash flow hedges	(346)	(22)
Change in derivatives designated as cash flow hedges, after taxes	(361)	9
Pension and other postretirement plans
(Increase) reduction in unrecognized actuarial losses	6	125
Income taxes on actuarial changes in plan liabilities	0	(30)
(Increase) reduction in unrecognized actuarial losses, net	6	95
Amortization of net actuarial losses	11	12
Income taxes on amortization of net actuarial losses	0	0
Net effect of amortization of net actuarial losses	11	12
Change in pension and other postretirement plans, after taxes	17	107
Other Comprehensive Income (Loss)	(344)	116
Comprehensive Income (Loss)	(269)	51
Less: Comprehensive income (loss) attributable to noncontrolling interests	43	41
Comprehensive Income (Loss) Attributable to Hess Corporation	$ (312)	$ 10