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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

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