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Related Party Transactions - Summary of Third-party Pass-through Costs for Which Revenues in Amount Equal to Costs are Recognized (Detail) - USD ($) $ in Millions	3 Months Ended			6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019		Jun. 30, 2020	Jun. 30, 2019
Related Party Transaction [Line Items]
Reimbursement revenue	$ 269.8	$ 190.2	[1]	$ 560.4	$ 379.6	[1]
Hess
Related Party Transaction [Line Items]
Total	46.0	26.4		95.3	52.7
Hess | Rail Transportation Costs
Related Party Transaction [Line Items]
Reimbursement revenue	21.1	4.3		44.3	12.1
Hess | Produced Water Trucking and Disposal Costs
Related Party Transaction [Line Items]
Reimbursement revenue	15.0	14.0		31.6	25.7
Hess | Electricity Fees
Related Party Transaction [Line Items]
Reimbursement revenue	$ 9.9	$ 8.1		$ 19.4	$ 14.9
[1] The financial information presented in this report has been retrospectively adjusted for the acquisition of Hess Infrastructure Partners LP.

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