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Summary of Significant Accounting Policies - Schedule of Regulatory Assets and Liabilities (Details) - Equitrans LP $ in Thousands | Dec. 31, 2024 USD ($)
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Regulated assets: |
Total regulated assets | $ 165,939
Regulated liabilities: |
Total regulated liabilities | 28,692
Deferred taxes |
Regulated liabilities: |
Total regulated liabilities | 8,534
On-going post-retirement benefits other than pension and other reimbursable costs |
Regulated liabilities: |
Total regulated liabilities | 20,158
Deferred taxes |
Regulated assets: |
Total regulated assets | 142,757
Other recoverable costs |
Regulated assets: |
Total regulated assets | $ 23,182
Asset retirement obligations |
Regulated liabilities: |
Remaining recovery period | 9 years 6 months
On-going post-retirement benefits other than pension and other reimbursable costs |
Regulated liabilities: |
Remaining recovery period | 7 years 6 months

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