CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED) - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Revenues
Affiliate services	$ 312.1	$ 288.8
Type of Revenue [Extensible List]	us-gaap:ServiceMember	us-gaap:ServiceMember
Other income	$ 0.3
Total revenues	312.4	$ 288.8
Costs and expenses
Operating and maintenance expenses (exclusive of depreciation shown separately below)	66.5	59.8
Depreciation expense	44.4	40.2
General and administrative expenses	6.0	6.3
Total costs and expenses	116.9	106.3
Income from operations	195.5	182.5
Income from equity investments	0.4	2.7
Interest expense, net	31.3	23.1
Income before income tax expense	164.6	162.1
Income tax expense	5.0	2.5
Net income	159.6	159.6
Less: Net income attributable to noncontrolling interest	142.7	151.0
Net income attributable to Hess Midstream LP	$ 16.9	$ 8.6
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	$ 0.50	$ 0.45
Net income attributable to Hess Midstream LP per Class A share, Diluted	$ 0.49	$ 0.43
Weighted average Class A shares outstanding
Weighted average Class A shares outstanding subsequent to the restructuring, Basic	33.7	19.3
Weighted average Class A shares outstanding subsequent to the restructuring, Diluted	33.8	19.4