Related Party Transactions - Summary of Classification of Charges between Operating and Maintenance Expenses and General and Administrative Expenses (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Related Party Transaction [Line Items]
Operating and maintenance expenses	$ 347.3	$ 313.0	$ 279.6
Hess
Related Party Transaction [Line Items]
Operating and maintenance expenses	$ 87.9	$ 79.7	$ 71.2
Operating Cost and Expense, Related Party [Extensible Enumeration]	us-gaap:RelatedPartyMember	us-gaap:RelatedPartyMember	us-gaap:RelatedPartyMember
General and administrative expenses	$ 16.6	$ 17.5	$ 15.9
Selling, General, and Administrative Expenses, Related Party [Extensible Enumeration]	us-gaap:RelatedPartyMember	us-gaap:RelatedPartyMember	us-gaap:RelatedPartyMember
Total	$ 104.5	$ 97.2	$ 87.1