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Segments and Related Information - Significant Customers - Narrative (Details) - Revenue Benchmark - Customer Concentration Risk
3 Months Ended 9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Equitrans Midstream Corporation        
Segments and Related Information [Line Items]        
Concentration risk, percentage of total 11.00%      
Customers Representing 10% Or More Of Company        
Segments and Related Information [Line Items]        
Concentration risk, percentage of total   0.00% 0.00% 0.00%