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Property, Plant and Equipment - Components of Property, Plant and Equipment (Detail) - USD ($)
$ in Millions
Dec. 31, 2023
Dec. 31, 2022
Property Plant And Equipment [Line Items]    
Total property, plant and equipment, at cost $ 4,818.7 $ 4,570.5
Accumulated depreciation (1,589.5) (1,397.7)
Property, plant and equipment, net $ 3,229.2 3,172.8
Minimum    
Property Plant And Equipment [Line Items]    
Property, plant and equipment, Estimated useful life 12 years  
Maximum    
Property Plant And Equipment [Line Items]    
Property, plant and equipment, Estimated useful life 35 years  
Logistics Facilities and Railcars    
Property Plant And Equipment [Line Items]    
Total property, plant and equipment, at cost $ 409.2 389.3
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 19.7
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 $ 28.0 25.5
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 $ 136.3 136.3
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 $ 1,703.7 1,591.7
Gathering Assets | Compressors, Pumping Stations and Terminals    
Property Plant And Equipment [Line Items]    
Total property, plant and equipment, at cost $ 1,026.4 923.1
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 $ 424.7 414.4
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