Debt Instrument, Conversion Cap Price

No definition available.

Name:	eqt_DebtInstrumentConversionCapPrice
Namespace Prefix:	eqt_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Debt Instrument, Conversion Strike Price

+ References

No definition available.

+ Details

Name:	eqt_DebtInstrumentConversionStrikePrice
Namespace Prefix:	eqt_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Debt Instrument Convertible Average Conversion Price

+ References

No definition available.

+ Details

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

- Definition

Debt Instrument, Convertible, Closing Price

+ References

No definition available.

+ Details

Name:	eqt_DebtInstrumentConvertibleClosingPrice
Namespace Prefix:	eqt_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Debt Instrument, Convertible, Consecutive Trading Days, Measurement Period

+ References

No definition available.

+ Details

Name:	eqt_DebtInstrumentConvertibleConsecutiveTradingDaysMeasurementPeriod
Namespace Prefix:	eqt_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Debt Instrument, Convertible, Conversion Premium

+ References

No definition available.

+ Details

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

- Definition

Debt Instrument, Convertible, Threshold Trading Days, Measurement Period

+ References

No definition available.

+ Details

Name:	eqt_DebtInstrumentConvertibleThresholdTradingDaysMeasurementPeriod
Namespace Prefix:	eqt_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Debt Instrument, Debt Covenant, Debt To Total Capitalization Ratio

+ References

No definition available.

+ Details

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

- Definition

Line Of Credit Facility, Extension Term

+ References

No definition available.

+ Details

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

- Definition

This element represents the number of times the line of credit facility can be requested to be extended.

+ References

No definition available.

+ Details

Name:	eqt_LineOfCreditFacilityExtensionsNumber
Namespace Prefix:	eqt_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Line of Credit Facility, Maximum Borrowing Capacity, Accordion Feature

+ References

No definition available.

+ Details

Name:	eqt_LineOfCreditFacilityMaximumBorrowingCapacityAccordionFeature
Namespace Prefix:	eqt_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

This element represents the number of financial institutions funding the borrowings of the entity on a pro-rata basis.

+ References

No definition available.

+ Details

Name:	eqt_LineOfCreditFacilityUnderwritingSyndicateFinancialInstitutionsNumber
Namespace Prefix:	eqt_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Payment of Debt Premium Charges

+ References

No definition available.

+ Details

Name:	eqt_PaymentOfDebtPremiumCharges
Namespace Prefix:	eqt_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Stock Issued During Period, Equity Component of Convertible Debt

+ References

No definition available.

+ Details

Name:	eqt_StockIssuedDuringPeriodEquityComponentOfConvertibleDebt
Namespace Prefix:	eqt_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The value of the financial instrument(s) that the original debt is being converted into in a noncash (or part noncash) transaction. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.

+ References

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

- Definition

The price per share of the conversion feature embedded in the debt instrument.

+ References

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+ Details

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Namespace Prefix:	us-gaap_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Ratio applied to the conversion of debt instrument into equity with equity shares divided by debt principal amount.

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+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

- Definition

The amount by which the convertible debt's if-converted value exceeds its principle amount at the balance sheet date, regardless of whether the instrument is currently convertible. This element applies to public companies only.

+ References

+ Details

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

- Definition

Threshold period of specified consecutive trading days within which common stock price to conversion price of convertible debt instrument must exceed threshold percentage for specified number of trading days to trigger conversion feature.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Minimum percentage of common stock price to conversion price of convertible debt instruments to determine eligibility of conversion.

+ References

No definition available.

+ Details

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Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Threshold number of specified trading days that common stock price to conversion price of convertible debt instruments must exceed threshold percentage within a specified consecutive trading period to trigger conversion feature.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Face (par) amount of debt instrument at time of issuance.

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+ Details

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

- Definition

Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

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+ Details

Name:	us-gaap_DebtInstrumentInterestRateEffectivePercentage
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

+ Details

Name:	us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Percentage price of original principal amount of debt at which debt can be redeemed by the issuer.

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+ Details

Name:	us-gaap_DebtInstrumentRedemptionPricePercentage
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Fair value amount of debt instrument that was repurchased.

+ References

No definition available.

+ Details

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

- Definition

Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of interest payable on debt, including, but not limited to, trade payables.

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

+ References

No definition available.

+ Details

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

- Definition

Average amount borrowed under the credit facility during the period.

+ References

No definition available.

+ Details

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

- Definition

The fee, expressed as a percentage of the line of credit facility, for the line of credit facility regardless of whether the facility has been used.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The effective interest rate during the reporting period.

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityInterestRateDuringPeriod
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Maximum amount borrowed under the credit facility at any time during the period.

+ References

No definition available.

+ Details

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

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

+ Details

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Namespace Prefix:	us-gaap_
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- References

No definition available.

+ Details

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- Definition

Amount of long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing after fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount of long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount of long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing in fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount of long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing in fourth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount of long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing in third fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

+ References

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Amount of long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing in second fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

+ References

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- Definition

The cash outflow paid to third parties in connection with debt origination, which will be amortized over the remaining maturity period of the associated long-term debt.

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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The excess of the (1) fair value of consideration transferred to the holders of a security in excess of (2) the carrying amount of the security reported on the registrant's balance sheet, which will be deducted from net earnings to derive net earnings available to common shareholders. This amount is generally an adjustment considered in the computation of earnings per share.

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No definition available.

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The cash outflow during the period from the repayment of aggregate short-term and long-term debt. Excludes payment of capital lease obligations.

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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No definition available.

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Price of a single share of a number of saleable stocks of a company.

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No definition available.

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Debt - Narrative (Details)				1 Months Ended				3 Months Ended	6 Months Ended	7 Months Ended	12 Months Ended
Debt - Narrative (Details)	May 17, 2021 USD ($)	Feb. 01, 2021 USD ($)	Apr. 23, 2020 $ / shares	Jan. 31, 2022 USD ($)	Nov. 30, 2020 shares	Oct. 31, 2020 shares	Apr. 30, 2020 USD ($) d $ / shares	Sep. 30, 2021 USD ($) $ / shares shares	Jun. 30, 2020 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2021 USD ($) financial_institution extension $ / shares	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Jan. 21, 2020 USD ($)	May 31, 2019 USD ($)
Maturities of Senior Notes
Aggregate maturities in 2022											$ 569,000,000
Aggregate maturities in 2023											10,000,000
Aggregate maturities in 2024											0
Aggregate maturities in 2025											1,000,000,000
Aggregate maturities in 2026											1,115,000,000
Aggregate maturities thereafter											$ 2,850,000,000
Commitment fee paid to maintain credit facility											0.28%	0.28%	0.20%
Principal											$ 5,643,652,000	$ 5,097,997,000
Proceeds from issuance of debt	$ 984,400,000										1,000,000,000	2,600,000,000	$ 1,000,000,000
Offering costs											19,713,000	71,056,000	913,000
Redemption price, percentage							100.00%
Threshold trading days, business days \| d							5
Consecutive trading day period \| d							5
Senior notes redeemed								$ 9,000
Sale of equity shares (in shares) \| shares					3,000,000	20,000,000		599
Average conversion price (in dollars per share) \| $ / shares								$ 19.64
Conversion strike price (in dollars per share) \| $ / shares							$ 15.00
Cap price (in dollars per share) \| $ / shares							$ 18.75
Equity component of convertible senior notes												(32,500,000)
Capped call transaction costs												32,500,000
Senior notes
Maturities of Senior Notes
Offering cost	15,600,000
Surety Bond
Maturities of Senior Notes
Letters of credit outstanding											245,000,000	93,000,000
6.125% Senior notes due 2025
Maturities of Senior Notes
Principal														$ 1,000,000,000
7.000% Senior notes due 2030
Maturities of Senior Notes
Principal														$ 750,000,000
3.125% notes due May 15, 2026 \| Senior notes
Maturities of Senior Notes
Principal	$ 500,000,000										$ 500,000,000	0
Interest rate	3.125%										3.125%
3.625% notes due May 15, 2031
Maturities of Senior Notes
Interest rate	3.625%
3.625% notes due May 15, 2031 \| Senior notes
Maturities of Senior Notes
Principal	$ 500,000,000										$ 500,000,000	0
Interest rate											3.625%
4.875% notes due November 15, 2021 \| Senior notes
Maturities of Senior Notes
Principal											$ 0	125,118,000
Interest rate		4.875%									4.875%
Debt repurchase		$ 125,100,000
Repayments of debt		130,700,000
Redemption premium		4,300,000
Accrued unpaid interest		$ 1,300,000
3.00% notes due October 1, 2022 \| Senior notes
Maturities of Senior Notes
Principal											$ 568,823,000	568,823,000
Interest rate											3.00%
Debt repurchase				$ 206,000,000
Repayments of debt				210,400,000
Redemption premium				2,600,000
Accrued unpaid interest				$ 1,800,000
Term loan agreement \| Unsecured Debt
Maturities of Senior Notes
Average daily balance of loans outstanding									$ 692,000,000	$ 1,000,000,000
Weighted average interest rates									2.60%	3.10%
Principal															$ 1,000,000,000
Note payable to EQM
Maturities of Senior Notes
Aggregate maturities in 2022											$ 5,500,000
Aggregate maturities in 2023											5,800,000
Aggregate maturities in 2024											6,300,000
Aggregate maturities in 2025											6,500,000
Aggregate maturities in 2026											6,900,000
Aggregate maturities thereafter											68,800,000
1.75% convertible notes due May 1, 2026 \| Senior notes
Maturities of Senior Notes
Principal							$ 500,000,000				$ 499,991,000	500,000,000
Interest rate							1.75%				1.75%
Offering costs							$ 16,900,000
Proceeds from sale of convertible notes							$ 483,100,000
Effective interest rate of convertible notes							2.40%
Threshold trading days \| d							20
Threshold consecutive trading days \| d							30
Redemption price, percentage							130.00%
Threshold trigger price, percent							98.00%
Conversion ratio							66.6667
Conversion price (in dollars per share) \| $ / shares							$ 15.00
Conversion premium percent			20.00%
Convertible closing price (in dollars per share) \| $ / shares			$ 12.50
Closing stock price (in dollars per share) \| $ / shares											$ 21.81
If-converted value											$ 227,000,000
Revolving Credit Facility \| EQT $2.5 billion facility
Maturities of Senior Notes
Maximum borrowing capacity											$ 2,500,000,000
Number of times the maturity date of the credit facility can be extended by one year \| extension											1
Extension term											1 year
Aggregate maximum of commitments available under accordion feature											$ 3,000,000,000
Number of financial institutions underwriting credit facility of the entity \| financial_institution											17
Debt to total capitalization ratio											65.00%
Letters of credit outstanding											$ 440,000,000	791,000,000
Maximum amount of outstanding borrowings											1,700,000,000	700,000,000	1,100,000,000
Average daily balance of loans outstanding											$ 609,000,000	$ 148,000,000	$ 340,000,000
Weighted average interest rates											1.90%	2.30%	3.80%