Property, Plant and Equipment - Components of Property, Plant and Equipment (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Property Plant And Equipment [Line Items]
Total property, plant and equipment, at cost	$ 3,905.0	$ 3,488.2
Accumulated depreciation	(894.9)	(752.9)
Property, plant and equipment, net	3,010.1	2,735.3	[1]
Logistics Facilities and Railcars
Property Plant And Equipment [Line Items]
Total property, plant and equipment, at cost	385.5	385.8
Storage Facilities
Property Plant And Equipment [Line Items]
Total property, plant and equipment, at cost	19.5	19.5
Other
Property Plant And Equipment [Line Items]
Total property, plant and equipment, at cost	13.0	11.4
Construction-In-Progress
Property Plant And Equipment [Line Items]
Total property, plant and equipment, at cost	$ 149.3	158.5
Minimum
Property Plant And Equipment [Line Items]
Property, plant and equipment, Estimated useful life	12 years
Minimum | Logistics Facilities and Railcars
Property Plant And Equipment [Line Items]
Property, plant and equipment, Estimated useful life	20 years
Minimum | Storage Facilities
Property Plant And Equipment [Line Items]
Property, plant and equipment, Estimated useful life	20 years
Minimum | Other
Property Plant And Equipment [Line Items]
Property, plant and equipment, Estimated useful life	20 years
Maximum
Property Plant And Equipment [Line Items]
Property, plant and equipment, Estimated useful life	35 years
Maximum | Logistics Facilities and Railcars
Property Plant And Equipment [Line Items]
Property, plant and equipment, Estimated useful life	25 years
Maximum | Storage Facilities
Property Plant And Equipment [Line Items]
Property, plant and equipment, Estimated useful life	25 years
Maximum | Other
Property Plant And Equipment [Line Items]
Property, plant and equipment, Estimated useful life	25 years
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	$ 1,352.7	1,098.1
Gathering Assets | Compressors, Pumping Stations and Terminals
Property Plant And Equipment [Line Items]
Total property, plant and equipment, at cost	$ 725.9	558.9
Gathering Assets | Minimum | Compressors, Pumping Stations and Terminals
Property Plant And Equipment [Line Items]
Property, plant and equipment, Estimated useful life	22 years
Gathering Assets | Maximum | Compressors, Pumping Stations and Terminals
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 | Equipment
Property Plant And Equipment [Line Items]
Total property, plant and equipment, at cost	$ 428.2	428.2
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
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	$ 188.6	$ 185.5
Gas Plant Assets | Minimum | Pipelines, Pipes and Valves
Property Plant And Equipment [Line Items]
Property, plant and equipment, Estimated useful life	22 years
Gas Plant Assets | Minimum | Equipment
Property Plant And Equipment [Line Items]
Property, plant and equipment, Estimated useful life	12 years
Gas Plant Assets | Maximum | Pipelines, Pipes and Valves
Property Plant And Equipment [Line Items]
Property, plant and equipment, Estimated useful life	25 years
Gas Plant Assets | Maximum | Equipment
Property Plant And Equipment [Line Items]
Property, plant and equipment, Estimated useful life	30 years

[1] The financial information presented in this report has been retrospectively adjusted for the acquisition of Hess Infrastructure Partners LP.