Earnings per Share - Schedule of Earnings per Share (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Limited Partners Capital Account [Line Items]
Net income	$ 161.9	$ 142.2
Less: Net income attributable to noncontrolling interest	117.3	121.5
Net income attributable to Hess Midstream LP	$ 44.6	$ 20.7
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	$ 0.60	$ 0.47
Net income attributable to Hess Midstream LP per Class A share, Diluted	$ 0.59	$ 0.47
Weighted average Class A shares outstanding
Weighted average Class A shares outstanding, Basic	75.1	44.0
Weighted average Class A shares outstanding, Diluted	75.2	44.1