This element represents the percentage of the stock-based award which will vest at the end of year one.

No definition available.

Name:	eqt_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedAtEndOfOneYearInPercentage
Namespace Prefix:	eqt_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

This element represents the percentage of the stock-based award which will vest at the end of year two.

+ References

No definition available.

+ Details

Name:	eqt_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedAtEndOfTwoYearInPercentage
Namespace Prefix:	eqt_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The weighted average fair value at grant date for equity-based awards issued and vested during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ References

No definition available.

+ Details

Name:	eqt_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedGrantsInPeriodWeightedAverageGrantDateFairValue
Namespace Prefix:	eqt_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	duration

- Definition

Share-Based Compensation Arrangement By Share-Based Payment Award, Fair Value Assumptions, Risk-Free Rate Term

+ References

No definition available.

+ Details

Name:	eqt_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeRateTerm
Namespace Prefix:	eqt_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the payout percentage based upon the performance during the performance period.

+ References

No definition available.

+ Details

Name:	eqt_ShareBasedCompensationArrangementByShareBasedPaymentAwardPayoutPercentage
Namespace Prefix:	eqt_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Share-based Payment Arrangement, Award Fair Value Adjustment, Additional Unit Received

+ References

No definition available.

+ Details

Name:	eqt_ShareBasedPaymentArrangementAwardFairValueAdjustmentAdditionalUnitReceived
Namespace Prefix:	eqt_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant

- Definition

Share-based Payment Arrangement, Award Fair Value Adjustment, Portion Of Existing Unit Retained

+ References

No definition available.

+ Details

Name:	eqt_ShareBasedPaymentArrangementAwardFairValueAdjustmentPortionOfExistingUnitsRetained
Namespace Prefix:	eqt_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant

- Definition

Aggregate carrying value as of the balance sheet date of the liabilities for all deferred compensation arrangements. Represents currently earned compensation under compensation arrangements that is not actually paid until a later date.

+ References

No definition available.

+ Details

Name:	us-gaap_DeferredCompensationLiabilityCurrentAndNoncurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of cost capitalized for award under share-based payment arrangement.

+ References

+ Details

Name:	us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

+ References

+ Details

Name:	us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

+ Details

Name:	us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of tax benefit from exercise of option under share-based payment arrangement.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2A
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=SL79508275-113901

+ Details

Name:	us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromExerciseOfStockOptions
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount of cash inflow from issuance of shares under share-based payment arrangement. Excludes option exercised.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3255-108585

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2A
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=SL79508275-113901

+ Details

Name:	us-gaap_ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlans
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Estimated period over which an employee is required to provide service in exchange for the equity-based payment award, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardRequisiteServicePeriod1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

+ References

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ References

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ References

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	duration

- Definition

The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

+ References

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash.

+ References

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Net number of non-option equity instruments granted to participants.

+ References

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsGranted
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of equity instruments other than options outstanding, including both vested and non-vested instruments.

+ References

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

+ References

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Gross number of share options (or share units) granted during the period.

+ References

No definition available.

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of share options (or share units) exercised during the current period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iv)(2)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(28))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(29))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=123467817&loc=d3e21463-112644

+ Details

Name:	us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_PlanNameAxis=eqt_IncentivePSUProgramMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PlanNameAxis=eqt_VDPSUProgramsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_AwardTypeAxis=us-gaap_PerformanceSharesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PlanNameAxis=eqt_A2020IncentivePerformanceShareUnitsProgramMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PlanNameAxis=eqt_A2021IncentivePerformanceShareUnitProgramMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PlanNameAxis=eqt_IncentivePSUProgramsEquitySettledMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_AwardTypeAxis=eqt_PerformanceShareEquityAwardsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_AwardTypeAxis=us-gaap_RestrictedStockMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_TitleOfIndividualAxis=eqt_KeyEmployeesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_AwardTypeAxis=eqt_RestrictedStockUnitsLiabilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_AwardTypeAxis=eqt_NonqualifiedStockOptionsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_AwardTypeAxis=us-gaap_StockAppreciationRightsSARSMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_AwardTypeAxis=eqt_NonemployeeDirectorsShareBasedAwardsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_AwardTypeAxis=us-gaap_PhantomShareUnitsPSUsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PlanNameAxis=eqt_A2022IncentivePerformanceShareUnitProgramMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Share-Based Compensation Plans - Narrative (Details)		1 Months Ended	12 Months Ended
Share-Based Compensation Plans - Narrative (Details)	Jan. 01, 2022 shares	Feb. 10, 2022 shares	Dec. 31, 2021 USD ($) $ / shares shares	Dec. 31, 2020 USD ($) $ / shares shares	Dec. 31, 2019 USD ($) $ / shares shares	Dec. 31, 2018 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cash received from exercises of all share-based payment arrangements for employees and directors			$ 0	$ 0	$ 0
Income tax benefit by the exercise of nonqualified employee stock options and vesting of restricted share awards			1,300,000	1,000,000	2,400,000
Existing unit retained						1
Additional unit received for each existing award						0.80
Capitalized compensation cost			4,994,000	3,142,000	0
Incentive PSU Program
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Capitalized compensation cost			800,000	900,000	(800,000)
Value Driver Performance Programs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Capitalized compensation cost			$ 0	$ 400,000	$ 2,500,000
Award vested at end of year one			50.00%
Award vested at end of year two			50.00%
Period after which the shares granted will be fully vested			1 year
Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award requisite service period			36 months
Performance Shares \| 2020 Incentive PSU Program
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation costs on non-vested awards			$ 3,200,000
Performance Shares \| 2021 Incentive PSU Program
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation costs on non-vested awards			$ 14,900,000
Performance Shares \| Incentive PSU Programs – Equity Settled
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Non-vested shares, granted (in shares) \| shares			922,260	1,376,198	463,380
Grant date fair value (in dollars per share) \| $ / shares			$ 23.44	$ 6.62	$ 29.45
Value of stock awards vested			$ 8,214,730	$ 5,375,504	$ 36,988,926
Awards outstanding (in shares) \| shares			2,754,648	1,939,728	615,293	536,014
Performance Shares \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation plan, award as a percentage of target award level			0.00%	0.00%	0.00%
Performance Shares \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation plan, award as a percentage of target award level			200.00%	150.00%	300.00%
Performance Share, Equity Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Risk-free rate term			3 years
Restricted stock awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Capitalized compensation cost			$ 6,700,000	$ 3,000,000
Unrecognized compensation costs on non-vested awards			$ 13,700,000
Non-vested shares, granted (in shares) \| shares			1,980,230
Grant date fair value (in dollars per share) \| $ / shares			$ 13.92
Value of stock awards vested			$ 8,612,563	$ 3,200,000	$ 11,900,000
Period for recognition			10 months 24 days
Awards outstanding (in shares) \| shares			3,104,281	1,868,400
Restricted stock awards \| Subsequent Event
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Risk-free rate term	3 years
Number of options granted (in shares) \| shares	1,248,120
Restricted stock awards \| Key Employees
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Period after which the shares granted will be fully vested			3 years	3 years
Non-vested shares, granted (in shares) \| shares			1,980,230	1,767,960	613,440
Grant date fair value (in dollars per share) \| $ / shares			$ 13.92	$ 10.02	$ 17.42
Restricted stock unit awards- liability
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Period after which the shares granted will be fully vested			3 years
Non-vested shares, granted (in shares) \| shares					686,350
Awards outstanding (in shares) \| shares			417,265
Deferred compensation liability			$ 8,100,000	$ 4,500,000	$ 4,400,000
Non-qualified stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation costs on non-vested awards			$ 200,000
Number of options granted (in shares) \| shares			0	1,000,000	779,300
Total intrinsic value of options exercised			$ 200,000
Exercised (in shares) \| shares			88,100	0	0
Stock appreciation rights
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation costs on non-vested awards			$ 4,000,000
Grant date fair value (in dollars per share) \| $ / shares				$ 10.00
Number of options granted (in shares) \| shares			1,240,000
Total intrinsic value of options exercised			$ 0
Non-employee directors' share-based awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares outstanding (in shares) \| shares			430,858
Shares granted (in shares) \| shares			120,080	201,300	146,790
Weighted average fair value, granted (in dollars per share) \| $ / shares			$ 17.49	$ 13.46	$ 18.11
PSU \| 2022 Incentive PSU Program \| Subsequent Event
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of options granted (in shares) \| shares		575,120
PSU \| Minimum \| 2022 Incentive PSU Program \| Subsequent Event
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation plan, award as a percentage of target award level		0.00%
PSU \| Maximum \| 2022 Incentive PSU Program \| Subsequent Event
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation plan, award as a percentage of target award level		200.00%