Related Party Transactions - Summary of Revenues From Contracts With Customers Including Affiliated Services and Third-party Services on Disaggregated Basis (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Disaggregation Of Revenue [Line Items]
Revenue from contract with customer including assessed tax	$ 1,346.1	$ 1,273.2	$ 1,203.8
Other income	2.5	2.0	0.0
Total revenues	1,348.6	1,275.2	1,203.8
Affiliate
Disaggregation Of Revenue [Line Items]
Revenue from contract with customer including assessed tax	1,338.1	1,273.2	1,203.8
Third Party
Disaggregation Of Revenue [Line Items]
Revenue from contract with customer including assessed tax	8.0
Oil and Gas Gathering Services | Affiliate
Disaggregation Of Revenue [Line Items]
Revenue from contract with customer including assessed tax	633.8	600.8	540.4
Processing and Storage Services | Affiliate
Disaggregation Of Revenue [Line Items]
Revenue from contract with customer including assessed tax	496.0	470.8	435.7
Terminaling and Export Services | Affiliate
Disaggregation Of Revenue [Line Items]
Revenue from contract with customer including assessed tax	114.4	124.5	137.5
Water Gathering and Disposal Services | Affiliate
Disaggregation Of Revenue [Line Items]
Revenue from contract with customer including assessed tax	$ 93.9	$ 77.1	$ 90.2