CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED) - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Revenues
Affiliate services	$ 321.9	$ 313.0	$ 625.3	$ 625.1
Type of Revenue [Extensible List]	us-gaap:ServiceMember	us-gaap:ServiceMember	us-gaap:ServiceMember	us-gaap:ServiceMember
Other income	$ 2.1	$ 0.4	$ 3.7	$ 0.7
Total revenues	324.0	313.4	629.0	625.8
Costs and expenses
Operating and maintenance expenses (exclusive of depreciation shown separately below)	73.1	67.8	135.6	134.3
Depreciation expense	47.0	45.0	94.4	89.4
General and administrative expenses	5.8	5.3	12.2	11.3
Total operating costs and expenses	125.9	118.1	242.2	235.0
Income from operations	198.1	195.3	386.8	390.8
Income from equity investments	1.7	1.0	3.3	1.4
Interest expense, net	43.8	37.4	85.4	68.7
Income before income tax expense	156.0	158.9	304.7	323.5
Income tax expense	8.1	7.1	14.6	12.1
Net income	147.9	151.8	290.1	311.4
Less: Net income attributable to noncontrolling interest	122.8	129.8	244.3	272.5
Net income attributable to Hess Midstream LP	$ 25.1	$ 22.0	$ 45.8	$ 38.9
Class A Shares
Net income attributable to Hess Midstream LP per Class A share:
Net income attributable to Hess Midstream LP per Class A share, Basic	$ 0.5	$ 0.51	$ 0.97	$ 1.01
Net income attributable to Hess Midstream LP per Class A share, Diluted	$ 0.5	$ 0.5	$ 0.97	$ 0.99
Weighted average Class A shares outstanding
Weighted average Class A shares outstanding, Basic	50.1	43.7	47.1	38.7
Weighted average Class A shares outstanding, Diluted	50.2	43.7	47.1	38.8