Segments - Financial Data for Each Reportable Segment (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Segment Reporting Information [Line Items]
Revenues and other income	$ 1,348.6	$ 1,275.2	$ 1,203.8
Net income (loss)	607.7	620.6	617.8
Net income (loss) attributable to Hess Midstream LP	118.6	83.9	46.4
Depreciation expense	192.5	181.3	165.6
Proportional share of equity affiliates' depreciation	5.1	5.1	5.1
Income from equity investments	7.7	5.3	10.6
Interest expense, net	179.0	149.3	105.4
Income tax expense	37.9	26.6	14.6
Adjusted EBITDA	1,022.2	982.9	908.5
Capital expenditures	245.7	231.8	183.0
Interest and Other
Segment Reporting Information [Line Items]
Net income (loss)	(225.6)	(183.1)	(127.3)
Net income (loss) attributable to Hess Midstream LP	(83.3)	(53.5)	(25.5)
Interest expense, net	179.0	149.3	105.4
Income tax expense	37.9	26.6	14.6
Adjusted EBITDA	(8.7)	(7.2)	(7.3)
Gathering Opco | Operating Segments
Segment Reporting Information [Line Items]
Revenues and other income	730.0	677.9	630.6
Net income (loss)	418.2	389.6	377.6
Net income (loss) attributable to Hess Midstream LP	101.6	66.4	36.3
Depreciation expense	115.6	107.4	101.0
Adjusted EBITDA	533.8	497.0	478.6
Capital expenditures	224.5	210.2	154.0
Processing and Storage | Operating Segments
Segment Reporting Information [Line Items]
Revenues and other income	501.7	470.8	435.7
Net income (loss)	345.2	329.1	263.8
Net income (loss) attributable to Hess Midstream LP	83.5	56.6	25.5
Depreciation expense	59.9	57.7	48.4
Proportional share of equity affiliates' depreciation	5.1	5.1	5.1
Income from equity investments	7.7	5.3	10.6
Adjusted EBITDA	410.2	391.9	317.3
Capital expenditures	11.2	8.8	28.8
Terminaling and Export | Operating Segments
Segment Reporting Information [Line Items]
Revenues and other income	116.9	126.5	137.5
Net income (loss)	69.9	85.0	103.7
Net income (loss) attributable to Hess Midstream LP	16.8	14.4	10.1
Depreciation expense	17.0	16.2	16.2
Adjusted EBITDA	86.9	101.2	119.9
Capital expenditures	$ 10.0	$ 12.8	$ 0.2