CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED) - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Revenues
Revenues	$ 413.5	$ 364.6	$ 794.5	$ 719.3
Type of Revenue [Extensible List]	us-gaap:ServiceMember	us-gaap:ServiceMember	us-gaap:ServiceMember	us-gaap:ServiceMember
Other income	$ 0.7	$ 0.9	$ 1.7	$ 1.8
Total revenues	414.2	365.5	796.2	721.1
Costs and expenses
Operating and maintenance expenses (exclusive of depreciation shown separately below)	94.1	87.5	179.7	165.6
Depreciation expense	51.8	50.5	103.3	100.3
General and administrative expenses	8.1	5.2	15.6	10.9
Total operating costs and expenses	154.0	143.2	298.6	276.8
Income from operations	260.2	222.3	497.6	444.3
Income from equity investments	4.0	3.7	7.4	6.4
Interest expense, net	55.4	49.7	111.8	98.2
Income before income tax expense	208.8	176.3	393.2	352.5
Income tax expense	29.1	16.0	52.1	30.3
Net income	179.7	160.3	341.1	322.2
Less: Net income attributable to noncontrolling interest	89.4	110.8	179.2	228.1
Net income attributable to Hess Midstream LP	90.3	49.5	161.9	94.1
Affiliate services
Revenues
Revenues	405.3	358.5	779.6	707.9
Third-party services
Revenues
Revenues	$ 8.2	$ 6.1	$ 14.9	$ 11.4
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	$ 0.74	$ 0.59	$ 1.39	$ 1.19
Net income attributable to Hess Midstream LP per Class A share, Diluted	$ 0.74	$ 0.59	$ 1.39	$ 1.19
Weighted average Class A shares outstanding
Weighted average Class A shares outstanding, Basic	121.8	83.8	116.3	79.5
Weighted average Class A shares outstanding, Diluted	121.8	83.8	116.3	79.5