Debt - Schedule of Debt Instrument Redemption (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2025	Jul. 31, 2025	Apr. 16, 2025	Mar. 12, 2025	Feb. 24, 2025	Dec. 31, 2024
Debt Instrument [Line Items]
Long-Term Debt	$ 8,217,822					$ 9,324,177
Senior Notes
Debt Instrument [Line Items]
Principal	905,691
Premiums Paid (Discounts Received)	17,385
Accrued but Unpaid Interest	12,278
Total Cost	935,354
Third party costs	$ 2,700
EQM's 7.500% notes due June 1, 2027 | Senior Notes
Debt Instrument [Line Items]
Interest rate, stated percentage (in percent)	7.50%					7.50%
Principal	$ 4,069
Premiums Paid (Discounts Received)	76
Accrued but Unpaid Interest	51
Total Cost	4,196
Long-Term Debt	$ 0					$ 511,377
EQM's 6.500% notes due July 1, 2027 | Senior Notes
Debt Instrument [Line Items]
Interest rate, stated percentage (in percent)	6.50%			6.50%	6.50%	6.50%
Principal	$ 555,077
Premiums Paid (Discounts Received)	14,590
Accrued but Unpaid Interest	6,754
Total Cost	576,421			$ 506,200
Long-Term Debt	$ 0					$ 915,538
EQT's 3.90% notes due October 1, 2027 | Senior Notes
Debt Instrument [Line Items]
Interest rate, stated percentage (in percent)	3.90%			3.90%	3.90%	3.90%
Principal	$ 233,345
Premiums Paid (Discounts Received)	(2,842)
Accrued but Unpaid Interest	4,070
Total Cost	234,573			$ 233,300
Long-Term Debt	$ 934,423					$ 1,166,523
EQM's 5.500% notes due July 15, 2028 | Senior Notes
Debt Instrument [Line Items]
Interest rate, stated percentage (in percent)	5.50%		5.50%			5.50%
Principal	$ 73,456
Premiums Paid (Discounts Received)	2,878
Accrued but Unpaid Interest	1,190
Total Cost	77,524
Long-Term Debt	$ 0					$ 118,204
EQM's 4.50% notes due January 15, 2029 | Senior Notes
Debt Instrument [Line Items]
Interest rate, stated percentage (in percent)	4.50%					4.50%
Principal	$ 8,338
Premiums Paid (Discounts Received)	27
Accrued but Unpaid Interest	17
Total Cost	8,382
Long-Term Debt	$ 0					$ 711,754
EQM's 6.375% notes due April 1, 2029 | Senior Notes
Debt Instrument [Line Items]
Interest rate, stated percentage (in percent)	6.375%					6.375%
Principal	$ 3,265
Premiums Paid (Discounts Received)	135
Accrued but Unpaid Interest	70
Total Cost	3,470
Long-Term Debt	$ 0					$ 608,667
EQM's 7.500% notes due June 1, 2030 | Senior Notes
Debt Instrument [Line Items]
Interest rate, stated percentage (in percent)	7.50%					7.50%
Principal	$ 5,536
Premiums Paid (Discounts Received)	666
Accrued but Unpaid Interest	69
Total Cost	6,271
Long-Term Debt	$ 0					$ 535,671
EQM's 4.75% notes due January 15, 2031 | Senior Notes
Debt Instrument [Line Items]
Interest rate, stated percentage (in percent)	4.75%					4.75%
Principal	$ 9,616
Premiums Paid (Discounts Received)	117
Accrued but Unpaid Interest	20
Total Cost	9,753
Long-Term Debt	$ 0					$ 1,045,219
EQM's 6.500% notes due July 15, 2048 | Senior Notes
Debt Instrument [Line Items]
Interest rate, stated percentage (in percent)	6.50%					6.50%
Principal	$ 12,989
Premiums Paid (Discounts Received)	1,738
Accrued but Unpaid Interest	37
Total Cost	14,764
Long-Term Debt	0					$ 81,338
Previously Existing EQM Notes | Senior Notes
Debt Instrument [Line Items]
Principal		$ 92,700
Long-Term Debt	$ 0