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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, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020
Related Party Transaction [Line Items] |  |  |  |
Reimbursement revenue | $ 294.8 | $ 269.8 | $ 583.6 | $ 560.4
Hess |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Total | 18.6 | 46.0 | 37.4 | 95.3
Hess | Electricity Fees |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Reimbursement revenue | 9.9 | 9.9 | 19.2 | 19.4
Hess | Produced Water Trucking and Disposal Costs |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Reimbursement revenue | $ 8.7 | 15.0 | 18.1 | 31.6
Hess | Rail Transportation Costs |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Reimbursement revenue |  | $ 21.1 | $ 0.1 | $ 44.3

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