Hess Midstream LP (Detail) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Variable Interest Entity [Line Items]
Liabilities	$ 12,087	$ 12,076
Cash and cash equivalents	1,285	1,545
Property, plant and equipment, net	14,235	16,814
Hess Midstream LP | Variable Interest Entity
Variable Interest Entity [Line Items]
Liabilities	2,031	1,941
Cash and cash equivalents	3	3
Property, plant and equipment, net	$ 3,103	$ 3,010