Summary of Significant Accounting Policies - Schedule of Regulated Operating Revenues, Expenses, Property, Plant and Equipment (Details) - USD ($) $ in Thousands	5 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Property, plant and equipment	$ 44,505,504	$ 33,817,169
Less: Accumulated depreciation and depletion	12,757,686	10,866,999
Net property, plant and equipment	31,747,818	$ 22,950,170
Equitrans LP
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating revenues	218,569
Operating expenses	78,908
Property, plant and equipment	2,667,352
Less: Accumulated depreciation and depletion	30,027
Net property, plant and equipment	$ 2,637,325