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Property, Plant and Equipment - Components of Property, Plant and Equipment (Detail) - USD ($) $ in Millions | Jun. 30, 2024 | Dec. 31, 2023
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Property Plant And Equipment [Line Items] |  |
Total property, plant and equipment, at cost | $ 4,926.7 | $ 4,818.7
Accumulated depreciation | (1,689.4) | (1,589.5)
Property, plant and equipment, net | 3,237.3 | 3,229.2
Logistics Facilities and Railcars |  |
Property Plant And Equipment [Line Items] |  |
Total property, plant and equipment, at cost | $ 409.2 | 409.2
Logistics Facilities and Railcars | Minimum |  |
Property Plant And Equipment [Line Items] |  |
Property, plant and equipment, Estimated useful life | 20 years |
Logistics Facilities and Railcars | Maximum |  |
Property Plant And Equipment [Line Items] |  |
Property, plant and equipment, Estimated useful life | 25 years |
Storage Facilities |  |
Property Plant And Equipment [Line Items] |  |
Total property, plant and equipment, at cost | $ 19.9 | 19.9
Storage Facilities | Minimum |  |
Property Plant And Equipment [Line Items] |  |
Property, plant and equipment, Estimated useful life | 20 years |
Storage Facilities | Maximum |  |
Property Plant And Equipment [Line Items] |  |
Property, plant and equipment, Estimated useful life | 25 years |
Other |  |
Property Plant And Equipment [Line Items] |  |
Total property, plant and equipment, at cost | $ 28.2 | 28.0
Other | Minimum |  |
Property Plant And Equipment [Line Items] |  |
Property, plant and equipment, Estimated useful life | 20 years |
Other | Maximum |  |
Property Plant And Equipment [Line Items] |  |
Property, plant and equipment, Estimated useful life | 25 years |
Construction-In-Progress |  |
Property Plant And Equipment [Line Items] |  |
Total property, plant and equipment, at cost | $ 134.6 | 136.3
Gathering Assets | Pipelines |  |
Property Plant And Equipment [Line Items] |  |
Property, plant and equipment, Estimated useful life | 22 years |
Total property, plant and equipment, at cost | $ 1,740.8 | 1,703.7
Gathering Assets | Compressors, Pumping Stations and Terminals |  |
Property Plant And Equipment [Line Items] |  |
Total property, plant and equipment, at cost | $ 1,091.1 | 1,026.4
Gathering Assets | Compressors, Pumping Stations and Terminals | Minimum |  |
Property Plant And Equipment [Line Items] |  |
Property, plant and equipment, Estimated useful life | 22 years |
Gathering Assets | Compressors, Pumping Stations and Terminals | Maximum |  |
Property Plant And Equipment [Line Items] |  |
Property, plant and equipment, Estimated useful life | 25 years |
Gas Plant Assets | Pipelines, Pipes and Valves |  |
Property Plant And Equipment [Line Items] |  |
Total property, plant and equipment, at cost | $ 460.0 | 460.0
Gas Plant Assets | Pipelines, Pipes and Valves | Minimum |  |
Property Plant And Equipment [Line Items] |  |
Property, plant and equipment, Estimated useful life | 22 years |
Gas Plant Assets | Pipelines, Pipes and Valves | Maximum |  |
Property Plant And Equipment [Line Items] |  |
Property, plant and equipment, Estimated useful life | 25 years |
Gas Plant Assets | Equipment |  |
Property Plant And Equipment [Line Items] |  |
Total property, plant and equipment, at cost | $ 428.2 | 428.2
Gas Plant Assets | Equipment | Minimum |  |
Property Plant And Equipment [Line Items] |  |
Property, plant and equipment, Estimated useful life | 12 years |
Gas Plant Assets | Equipment | Maximum |  |
Property Plant And Equipment [Line Items] |  |
Property, plant and equipment, Estimated useful life | 30 years |
Gas Plant Assets | Processing and Fractionation Facilities |  |
Property Plant And Equipment [Line Items] |  |
Property, plant and equipment, Estimated useful life | 25 years |
Total property, plant and equipment, at cost | $ 432.4 | 424.7
Gas Plant Assets | Buildings |  |
Property Plant And Equipment [Line Items] |  |
Property, plant and equipment, Estimated useful life | 35 years |
Total property, plant and equipment, at cost | $ 182.3 | $ 182.3

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