Earnings per Share - Schedule of Earnings per Share (Detail) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Limited Partners Capital Account [Line Items]
Net income	$ 659.0	$ 607.7	$ 620.6
Less: Net income attributable to noncontrolling interest	435.9	489.1	536.7
Net income attributable to Hess Midstream LP	$ 223.1	$ 118.6	$ 83.9
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	$ 2.51	$ 2.11	$ 2.03
Net income attributable to Hess Midstream LP per Class A share, Diluted	$ 2.49	$ 2.08	$ 2.01
Weighted average Class A shares outstanding
Weighted average Class A shares outstanding, Basic	89	56.2	41.3
Weighted average Class A shares outstanding, Diluted	89	56.3	41.4