Debt - Schedule of Long-Term Debt (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Jan. 19, 2024	Dec. 31, 2023	Apr. 30, 2020
Debt Instrument [Line Items]
Principal Value	$ 9,368,516		$ 5,836,058
Carrying Value	9,324,177		5,795,113
Fair Value	9,299,525		6,267,476
Less: Current portion of debt, principal value	320,800		296,424
Current portion of debt	320,800		292,432
Less: Current portion of debt	320,800		774,983
Total long-term debt, principal value	9,047,716		5,539,634
Total long-term debt, carrying value	9,003,377		5,502,681
Total long-term debt, fair value	8,978,725		5,492,493
Senior notes
Debt Instrument [Line Items]
Carrying Value	8,900,000		4,500,000
Senior notes | Significant other observable inputs (Level 2)
Debt Instrument [Line Items]
Fair Value	8,800,000		4,900,000
EQT's revolving credit facility maturing July 23, 2029 | Credit facility
Debt Instrument [Line Items]
Principal Value	150,000		0
Carrying Value	150,000		0
Fair Value	150,000		0
Eureka's revolving credit facility maturing November 13, 2025 | Credit facility
Debt Instrument [Line Items]
Principal Value	320,800		0
Carrying Value	320,800		0
Fair Value	320,800		0
Term Loan Facility due June 30, 2026 | Loans Payable
Debt Instrument [Line Items]
Principal Value	0		1,250,000
Carrying Value	0		1,244,265
Fair Value	$ 0		$ 1,244,265
EQT's 6.125% notes due February 1, 2025 | Senior notes
Debt Instrument [Line Items]
Interest rate (percent)	6.125%		6.125%
Principal Value	$ 0		$ 601,521
Carrying Value	0		600,389
Fair Value	$ 0		$ 605,082
EQT's 1.75% convertible notes due May 1, 2026 | Senior notes
Debt Instrument [Line Items]
Interest rate (percent)	1.75%		1.75%	1.75%
Principal Value	$ 0		$ 290,177
Carrying Value	0		286,185
Fair Value	$ 0		$ 768,554
EQT's 3.125% notes due May 15, 2026 | Senior notes
Debt Instrument [Line Items]
Interest rate (percent)	3.125%		3.125%
Principal Value	$ 392,915		$ 392,915
Carrying Value	391,193		389,978
Fair Value	$ 382,994		$ 373,261
EQT's 7.75% debentures due July 15, 2026 | Senior notes
Debt Instrument [Line Items]
Interest rate (percent)	7.75%		7.75%
Principal Value	$ 115,000		$ 115,000
Carrying Value	114,213		113,716
Fair Value	$ 119,590		121,590
EQM's 7.500% notes due June 1, 2027 | Senior notes
Debt Instrument [Line Items]
Interest rate (percent)	7.50%
Principal Value	$ 500,000		0
Carrying Value	511,377		0
Fair Value	$ 510,140		0
EQM's 6.500% notes due July 1, 2027 | Senior notes
Debt Instrument [Line Items]
Interest rate (percent)	6.50%
Principal Value	$ 900,000		0
Carrying Value	915,538		0
Fair Value	$ 912,159		$ 0
EQT's 3.90% notes due October 1, 2027 | Senior notes
Debt Instrument [Line Items]
Interest rate (percent)	3.90%		3.90%
Principal Value	$ 1,169,503		$ 1,169,503
Carrying Value	1,166,523		1,165,439
Fair Value	$ 1,137,248		$ 1,121,027
EQT's 5.700% notes due April 1, 2028 | Senior notes
Debt Instrument [Line Items]
Interest rate (percent)	5.70%		5.70%
Principal Value	$ 500,000		$ 500,000
Carrying Value	492,640		490,376
Fair Value	$ 508,695		509,280
EQM's 5.500% notes due July 15, 2028 | Senior notes
Debt Instrument [Line Items]
Interest rate (percent)	5.50%
Principal Value	$ 118,683		0
Carrying Value	118,204		0
Fair Value	$ 117,382		$ 0
EQT's 5.00% notes due January 15, 2029 | Senior notes
Debt Instrument [Line Items]
Interest rate (percent)	5.00%		5.00%
Principal Value	$ 318,494		$ 318,494
Carrying Value	315,785		315,121
Fair Value	$ 314,357		316,784
EQM's 4.50% notes due January 15, 2029 | Senior notes
Debt Instrument [Line Items]
Interest rate (percent)	4.50%
Principal Value	$ 742,923		0
Carrying Value	711,754		0
Fair Value	$ 711,297		0
EQM's 6.375% notes due April 1, 2029 | Senior notes
Debt Instrument [Line Items]
Interest rate (percent)	6.375%
Principal Value	$ 600,000		0
Carrying Value	608,667		0
Fair Value	$ 606,774		$ 0
EQT's 7.000% notes due February 1, 2030 | Senior notes
Debt Instrument [Line Items]
Interest rate (percent)	7.00%		7.00%
Principal Value	$ 674,800		$ 674,800
Carrying Value	671,641		671,020
Fair Value	$ 718,358		726,645
EQM's 7.500% notes due June 1, 2030 | Senior notes
Debt Instrument [Line Items]
Interest rate (percent)	7.50%
Principal Value	$ 500,000		0
Carrying Value	535,671		0
Fair Value	$ 534,950		0
EQM's 4.75% notes due January 15, 2031 | Senior notes
Debt Instrument [Line Items]
Interest rate (percent)	4.75%
Principal Value	$ 1,100,000		0
Carrying Value	1,045,219		0
Fair Value	$ 1,039,995		$ 0
EQT's 3.625% notes due May 15, 2031 | Senior notes
Debt Instrument [Line Items]
Interest rate (percent)	3.625%		3.625%
Principal Value	$ 435,165		$ 435,165
Carrying Value	430,818		430,141
Fair Value	$ 388,111		389,925
EQT's 5.750% notes due February 1, 2034 | Senior notes
Debt Instrument [Line Items]
Interest rate (percent)	5.75%	5.75%
Principal Value	$ 750,000	$ 750,000	0
Carrying Value	742,796		0
Fair Value	$ 744,743		0
EQM's 6.500% notes due July 15, 2048 | Senior notes
Debt Instrument [Line Items]
Interest rate (percent)	6.50%
Principal Value	$ 80,233		0
Carrying Value	81,338		0
Fair Value	81,932		0
EQT's note payable to EQM | Note payable
Debt Instrument [Line Items]
Principal Value	0		88,483
Carrying Value	0		88,483
Fair Value	$ 0
EQT's note payable to EQM | Note payable | Significant unobservable inputs (Level 3)
Debt Instrument [Line Items]
Fair Value			$ 91,063
1.75% convertible notes due May 1, 2026 | Senior notes
Debt Instrument [Line Items]
Interest rate (percent)				1.75%
Principal Value				$ 500,000