XML 49 R38.htm IDEA: XBRL DOCUMENT v3.20.2
Related Party Transactions - Summary of Revenues From Contracts With Customers on Disaggregated Basis (Detail) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Disaggregation Of Revenue [Line Items]        
Total revenues from contracts with customers $ 264.7 $ 214.9 [1] $ 825.1 $ 594.5 [1]
Other income 0.1   0.3 0.3 [1]
Total revenues 264.8 214.9 [1] 825.4 594.8 [1]
Oil and Gas Gathering Services        
Disaggregation Of Revenue [Line Items]        
Total revenues from contracts with customers 118.7 86.4 349.2 245.6
Water Gathering and Disposal Services        
Disaggregation Of Revenue [Line Items]        
Total revenues from contracts with customers 24.2 19.5 71.7 52.4
Processing and Storage Services        
Disaggregation Of Revenue [Line Items]        
Total revenues from contracts with customers 90.1 74.0 273.7 207.8
Terminaling and Export Services        
Disaggregation Of Revenue [Line Items]        
Total revenues from contracts with customers $ 31.7 $ 35.0 $ 130.5 $ 88.7
[1] The financial information presented in this report has been retrospectively adjusted for the acquisition of Hess Infrastructure Partners LP.