Trading Arrangements, by Individual Trading Arrangements, by Individual [Table] Trading Arrangement: Trading Arrangement [Axis] Maximum Maximum [Member] Portion at Fair Value Measurement Portion at Fair Value Measurement [Member] Statistical Measurement [Domain] Statistical Measurement [Domain] Title of 12(b) Security Title of 12(b) Security Net income attributable to EQT Corporation – Diluted income available to shareholders Net Income (Loss) Available to Common Stockholders, Diluted Pittsylvania Pittsylvania County [Member] Pittsylvania County Subsequent Event Subsequent Event [Member] 3.900% notes due October 1, 2027 EQT 3.900% Notes Due October 1, 2027 [Member] 3.90% notes due October 1, 2027 Carrying value Reported Value Measurement [Member] Document Fiscal Year Focus Document Fiscal Year Focus Derivative instruments subject to master netting agreements Derivative Liability, Subject to Master Netting Arrangement, Asset Offset Remaining performance obligation, expected timing of satisfaction, period Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period Margin requirements with counterparties Derivative Liability, Subject to Master Netting Arrangement, Collateral, Right to Reclaim Cash Offset Derivative Instruments, Gain (Loss) [Table] Derivative Instruments, Gain (Loss) [Table] Adjustment to Compensation, Amount Adjustment to Compensation Amount Segment Reporting [Abstract] Segment Reporting [Abstract] Cash paid for taxes to net settle share-based incentive awards Payment, Tax Withholding, Share-Based Payment Arrangement Schedule of Long-Term Debt Instruments Schedule of Long-Term Debt Instruments [Table Text Block] Number of joint venture miles Number Of Joint Venture Miles Number Of Joint Venture Miles Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis] Entity Addresses [Table] Entity Addresses [Table] Line of Credit Line of Credit [Member] Restatement Determination Date Restatement Determination Date Margin requirements with counterparties Derivative Asset, Subject to Master Netting Arrangement, Collateral, Obligation to Return Cash, Offset Against Derivative Asset Investments in unconsolidated entities Investment in the MVP Joint Venture Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures Derivative Instrument [Axis] Derivative Instrument [Axis] Derivative Instrument [Axis] EQT Fourth A& R Revolving Credit Facility EQT Fourth A& R Revolving Credit Facility [Member] EQT Fourth A& R Revolving Credit Facility [Member] Contract with Customer, Basis of Pricing [Domain] Contract with Customer, Basis of Pricing [Domain] Amendment Flag Amendment Flag Current liabilities: Liabilities, Current [Abstract] Project [Axis] Project [Axis] Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Corporate depreciation and amortization Other Depreciation and Amortization Other revenues Other Cost of Operating Revenue Series of Individually Immaterial Asset Acquisitions Series of Individually Immaterial Asset Acquisitions [Member] Other comprehensive income, net of tax: Other Comprehensive Income (Loss), Net of Tax [Abstract] Distributions to noncontrolling interests Payments to Noncontrolling Interests Adjustment to Non-PEO NEO Compensation Footnote Adjustment to Non-PEO NEO Compensation Footnote [Text Block] Entity Address, State or Province Entity Address, State or Province Granted (in shares) Shares granted (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross PEO Total Compensation Amount PEO Total Compensation Amount Asset Acquisition [Axis] Asset Acquisition [Axis] Total capital expenditures Segment Reporting, Long-Lived Asset, Expenditure for Addition Weighted average common stock outstanding - Basic (in shares) Weighted average common stock outstanding - basic (in shares) Weighted Average Number of Shares Outstanding, Basic Option Tranche 1 Share-Based Payment Arrangement, Tranche One [Member] Amounts due from contracts with customers Contract with Customer, Asset, after Allowance for Credit Loss, Current Outstanding Aggregate Erroneous Compensation Amount Outstanding Aggregate Erroneous Compensation Amount Number of reportable segments Number of Reportable Segments Total current liabilities Liabilities, Current Gathering Gathering Segment [Member] Gathering Segment Eureka Revolving Credit Facility Eureka Revolving Credit Facility [Member] Eureka Revolving Credit Facility Comprehensive income, net of tax: Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract] Entity Address, City or Town Entity Address, City or Town Schedule of Supplemental Cash Flow Information Schedule of Cash Flow, Supplemental Disclosures [Table Text Block] Capital Unit, Class A Capital Unit, Class A [Member] Share-based Compensation Arrangement by Share-based Payment Award Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] MVP Joint Venture MVP Joint Venture [Member] MVP Joint Venture [Member] Award Timing MNPI Disclosure Award Timing MNPI Disclosure [Text Block] Basis of Presentation Basis of Accounting, Policy [Policy Text Block] Net intangible assets Intangible Asset, Finite-Lived, after Accumulated Amortization Peer Group Total Shareholder Return Amount Peer Group Total Shareholder Return Amount Net income attributable to EQT Corporation – Basic income available to shareholders Net Income (Loss) Available to Common Stockholders, Basic Volume of derivative instruments (in Bcf, Mbbls) Derivative, Nonmonetary Notional Amount Capital Unit, Class [Domain] Capital Unit, Class [Domain] Pipeline diameter (in inches) Oil And Gas, Diameter of Natural Gas Pipeline Oil And Gas, Diameter of Natural Gas Pipeline Significant other observable inputs (Level 2) Fair Value, Inputs, Level 2 [Member] Total Shareholder Return Vs Peer Group Total Shareholder Return Vs Peer Group [Text Block] Laurel Mountain Midstream, LLC Laurel Mountain Midstream, LLC [Member] Laurel Mountain Midstream, LLC Line of credit facility, maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Non-Rule 10b5-1 Arrangement Terminated Non-Rule 10b5-1 Arrangement Terminated [Flag] Schedule of Assets By Segment Segment Reporting, Reconciliation of Asset by Segment to Consolidated [Table Text Block] Current portion of debt Less: Current portion of debt, carrying value Long-Term Debt, Current Maturities Subsequent Event Type [Axis] Subsequent Event Type [Axis] Line of Credit Facility [Table] Schedule of Long-Term Debt Instruments [Table] Capitalization of non-cash equity share-based compensation Share-Based Payment Arrangement, Amount Capitalized Recently Issued Accounting Standards New Accounting Pronouncements, Policy [Policy Text Block] Schedule of Financial Information by Business Segment and Capital Expenditures Segment Reporting [Table Text Block] Noncontrolling Interests in Consolidated Subsidiaries Noncontrolling Interest [Member] Loss on sale/exchange of long-lived assets Loss (gain) on sale/exchange of long-lived assets Gain (Loss) on Disposition of Property Plant Equipment MVP Mainline MVP Mainline [Member] MVP Mainline Revenue Recognition Revenue from Contract with Customer [Policy Text Block] Other post-retirement benefits liability adjustment, tax expense (benefit) Other post-retirement benefits liability adjustment, tax (expense) benefit Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, Tax MVP A MVP A [Member] MVP A BXCI Affiliate BXCI Affiliate [Member] BXCI Affiliate Repayment of revolving credit facility borrowings Repayments of Lines of Credit Unallocated amounts: Segment Reporting, Reconciliation [Abstract] Carrying Value Long-Term Debt Document Period End Date Document Period End Date Changes in other assets and liabilities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Increase (Decrease) in Operating Capital [Abstract] Net cash used in investing activities Cash Provided by (Used in) Investing Activity, Including Discontinued Operation Equity Awards Adjustments, Excluding Value Reported in Compensation Table Equity Awards Adjustments, Excluding Value Reported in the Compensation Table [Member] Total other sources of revenue Other Sources Of Revenue [Member] Other Sources Of Revenue Preferred stock outstanding (in shares) Preferred Stock, Shares Outstanding Principal Value Debt Instrument, Face Amount Basic Earnings Per Share, Basic [Abstract] Operating expenses: Costs and Expenses [Abstract] Security Exchange Name Security Exchange Name Transaction Market Method [Axis] Transaction Market Method [Axis] Gathering revenues from MVCs: Minimum Volume Commitment Contract [Member] Minimum Volume Commitment Contract Contribution from noncontrolling interests Proceeds from Noncontrolling Interests Equity Method Investment, Nonconsolidated Investee [Axis] Equity Method Investment, Nonconsolidated Investee [Axis] Entity Addresses [Line Items] Entity Addresses [Line Items] Aggregate grant-date fair value Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax Entity Shell Company Entity Shell Company Consolidation Items [Domain] Consolidation Items [Domain] Accrued interest Interest Payable, Current Statement of Comprehensive Income [Abstract] Statement of Comprehensive Income [Abstract] Income Per Share Earnings Per Share [Text Block] Name Outstanding Recovery, Individual Name Income per share of common stock attributable to EQT Corporation: Earnings Per Share [Abstract] Earnings Per Share [Abstract] Award Timing, How MNPI Considered Award Timing, How MNPI Considered [Text Block] Document Fiscal Period Focus Document Fiscal Period Focus Peer Group Issuers, Footnote Peer Group Issuers, Footnote [Text Block] Exchange traded natural gas contracts Exchange Traded Natural Gas Contracts [Member] Exchange Traded Natural Gas Contracts Intersegment Eliminations and Other Unallocated amounts Corporate And Reconciling Items [Member] Corporate And Reconciling Items Total liabilities Liabilities Trading Symbol Trading Symbol Geographical [Domain] Geographical [Domain] Capital expenditures Payments to Acquire Property, Plant, and Equipment Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year [Member] Pension Adjustments Prior Service Cost Pension Adjustments Prior Service Cost [Member] Unrecognized compensation cost Share-Based Payment Arrangement, Nonvested Award, Option, Cost Not yet Recognized, Amount Company Selected Measure Name Company Selected Measure Name Income Tax Disclosure [Abstract] Income Tax Disclosure [Abstract] 7.000% notes due February 1, 2030 E Q T 7.000% Notes Due February 1, 2030 [Member] E Q T 7.000% Notes Due February 1, 2030 Non-cash activity during the period for: Noncash Investing and Financing Items [Abstract] Diluted Income per share of common stock attributable to EQT Corporation: Earnings Per Share, Diluted [Abstract] 3.125% notes due May 15, 2026 E Q T 3.125% Notes Due May 15, 2026 [Member] E Q T 3.125% Notes Due May 15, 2026 The Investment Fund The Investment Fund [Member] The Investment Fund Mountain Valley Pipeline Mountain Valley Pipeline [Member] Represents information pertaining to Mountain Valley Pipeline (MVP). Credit Facility [Domain] Credit Facility [Domain] Cash flows from operating activities: Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract] Distribution Timing [Domain] Distribution Timing [Domain] Distribution Timing Compensation Amount Outstanding Recovery Compensation Amount Individual: Individual [Axis] Weighted average common stock outstanding - Diluted (in shares) Weighted average common stock outstanding - diluted (in shares) Weighted Average Number of Shares Outstanding, Diluted Disaggregation of Revenue Disaggregation of Revenue [Line Items] Entity Emerging Growth Entity Emerging Growth Company Equity Valuation Assumption Difference, Footnote Equity Valuation Assumption Difference, Footnote [Text Block] Line of Credit Facility [Table] Line of Credit Facility [Table] Underlying Security Market Price Change Underlying Security Market Price Change, Percent Proceeds from revolving credit facility borrowings Proceeds from Lines of Credit Deferred income tax expense Deferred Income Taxes and Tax Credits Derivative Instruments Derivative Instruments and Hedging Activities Disclosure [Text Block] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table] 5.00% notes due January 15, 2029 E Q T 5.00% Notes Due January 15, 2029 [Member] E Q T 5.00% Notes Due January 15, 2029 Derivative instruments, at fair value Gross derivative instruments recorded in the Condensed Consolidated Balance Sheets Liability derivative instruments, at fair value Derivative Liability, Subject to Master Netting Arrangement, before Offset Revenue from Contract with Customer [Abstract] Revenue from Contract with Customer [Abstract] 4.75% notes due January 15, 2031 EQT 4.75% Notes Due January 15, 2031 [Member] EQT 4.75% Notes Due January 15, 2031 Distribution paid Distribution Made to Limited Partner, Cash Distributions Paid Award Timing Predetermined Award Timing Predetermined [Flag] Project [Domain] Project [Domain] Letters of credit outstanding under revolving credit facility (less than) Letters of Credit Outstanding, Amount Adjustment To PEO Compensation, Footnote Adjustment To PEO Compensation, Footnote [Text Block] Quoted prices in active markets for identical assets (Level 1) Fair Value, Inputs, Level 1 [Member] Effective income tax expense (benefit) (in percent) Effective Income Tax Rate Reconciliation, Percent Organization, Consolidation and Presentation of Financial Statements [Abstract] Organization, Consolidation and Presentation of Financial Statements [Abstract] Cash paid for acquisitions of additional interests in equity method investments Payments To Acquire Additional Interest In Equity Method Investments Payments To Acquire Additional Interest In Equity Method Investments Stock options, restricted stock and performance awards (in shares) Incremental Common Shares Attributable to Dilutive Effect of Share-Based Payment Arrangements 6.375% notes due April 1, 2029 EQT 6.375% Notes Due April 1, 2029 [Member] EQT 6.375% Notes Due April 1, 2029 All Executive Categories All Executive Categories [Member] 7.500% notes due June 1, 2030 EQT 7.500% Notes Due June 1, 2030 [Member] EQT 7.500% Notes Due June 1, 2030 Annual minimum volume (in Bcf per day) Oil and Gas, Delivery Commitment, Daily Production Pension Adjustments Service Cost Pension Adjustments Service Cost [Member] Long-term debt Long-Term Debt, Fair Value Vesting [Domain] Vesting [Domain] Asset Acquisition [Domain] Asset Acquisition [Domain] Natural gas Natural Gas Sales [Member] Natural Gas Sales [Member] Schedule of Computation of Basic and Diluted Income Per Share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Fair Value Disclosures [Abstract] Fair Value Disclosures [Abstract] NGLs NGLs Sales [Member] NGLs Sales [Member] Debt Disclosure [Abstract] Debt Disclosure [Abstract] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Financial Information by Business Segment Segment Reporting [Text Block] Minimum Minimum [Member] Dividends paid Payments of Ordinary Dividends, Common Stock Expiration Date Trading Arrangement Expiration Date Hedging Relationship [Axis] Hedging Relationship [Axis] Schedule of Disaggregation of Revenue Disaggregation of Revenue [Table Text Block] Schedule of Debt Redeemed or Repurchased Debt Instrument Redemption [Table Text Block] Weighted Average Number of Shares Outstanding Reconciliation [Abstract] Weighted Average Number of Shares Outstanding Reconciliation [Abstract] Non-Rule 10b5-1 Arrangement Adopted Non-Rule 10b5-1 Arrangement Adopted [Flag] Total equity Beginning balance Ending balance Equity, Including Portion Attributable to Noncontrolling Interest Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table [Member] Issuance of performance guarantee Loss Contingency, Estimate of Possible Loss Aggregate Pension Adjustments Service Cost Aggregate Pension Adjustments Service Cost [Member] Derivative [Table] Derivative [Table] Common stock, authorized shares (in shares) Common Stock, Shares Authorized Common stock, par value (in dollars per share) Common Stock, No Par Value Premiums Paid (Discounts Received) Debt Instrument, Unamortized Discount (Premium), Net Investments in unconsolidated entities Noncash Or Part Noncash Acquisition, Investment In Nonconsolidated Entity Noncash Or Part Noncash Acquisition, Investment In Nonconsolidated Entity Exercise Price Award Exercise Price Cash flows from investing activities: Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract] Schedule of Equity Method Investments [Line Items] Schedule of Equity Method Investments [Line Items] Natural Gas Liquids (NGL) Natural Gas Liquids (NGL) [Member] Segment Reporting [Line Items] Segment Reporting [Line Items] Document Quarterly Report Document Quarterly Report Distribution Timing [Axis] Distribution Timing [Axis] Distribution Timing Asset derivative instruments, at fair value Derivative Asset [Abstract] Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested [Member] Segments [Domain] Segments [Domain] Income tax receivable and payable Increase (Decrease) in Income Taxes Payable, Net of Income Taxes Receivable Debt Debt Disclosure [Text Block] Accrued but Unpaid Interest Interest Payable Repayment and retirement of debt Repayments of long-term debt Repayments of Long-Term Debt Less: Current portion of debt, principal value Debt Instrument, Face Amount, Current Debt Instrument, Face Amount, Current Liability derivative instruments, at fair value Derivative Liability [Abstract] Awards Close in Time to MNPI Disclosures, Table Awards Close in Time to MNPI Disclosures [Table Text Block] Carrying Value Equity Method Investments Equity Component [Domain] Equity Component [Domain] PEO Actually Paid Compensation Amount PEO Actually Paid Compensation Amount until the Base Return Distribution Timing, Period One [Member] Distribution Timing, Period One Business Combination, Asset Acquisition, Transaction between Entities under Common Control, and Joint Venture Formation [Abstract] Revolving credit facility borrowings Long-Term Line of Credit, Noncurrent Performance Guarantee Performance Guarantee [Member] Total revenues from contracts with customers Revenues From Contract With Customers [Member] Revenues From Contract With Customers Total operating expenses Total operating expenses Costs and Expenses Adoption Date Trading Arrangement Adoption Date Capital contributions to equity method investments Payments to acquire investments Payments to Acquire Equity Method Investments Interest rate (percent) Debt Instrument, Interest Rate, Stated Percentage Counterparty Name [Domain] Counterparty Name [Domain] Dividends Dividends, Common Stock, Cash Total common shareholders' equity Equity, Attributable to Parent MVP Southgate MVP Southgate [Member] MVP Southgate Entity Addresses, Address Type [Axis] Entity Addresses, Address Type [Axis] ASSETS Segment assets: Assets [Abstract] Title Trading Arrangement, Individual Title Forgone Recovery due to Disqualification of Tax Benefits, Amount Forgone Recovery due to Disqualification of Tax Benefits, Amount Restatement does not require Recovery Restatement Does Not Require Recovery [Text Block] Risk-free rate Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Risk Free Interest Rate Insider Trading Policies and Procedures [Line Items] Other financing activities Proceeds from (Payment for) Other Financing Activity Allowance for credit loss Accounts Receivable, Allowance for Credit Loss, Current Insider Trading Policies and Procedures Adopted Insider Trading Policies and Procedures Adopted [Flag] Derivative Instruments, Gain (Loss) Derivative Instruments, Gain (Loss) [Line Items] Selling, general and administrative Corporate selling, general and administrative Selling, General and Administrative Expense Business Combination [Domain] Business Combination [Domain] Transmission Transmission Segment [Member] Transmission Segment Contributions from noncontrolling interests Noncontrolling Interest, Increase from Subsidiary Equity Issuance Compensation Actually Paid vs. Net Income Compensation Actually Paid vs. Net Income [Text Block] Antidilutive (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Number of operating segments Number of Operating Segments Entity Central Index Key Entity Central Index Key Common stock, no par value, shares authorized: 1,280,000, shares issued: 625,513 and 624,076 Common Stock, Value, Outstanding Less: Accumulated depreciation and depletion Property, Plant, and Equipment, Accumulated Depreciation, Depletion, and Amortization Asset retirement obligations and other liabilities Asset Retirement Obligations and Other Liabilities, Noncurrent Asset Retirement Obligations and Other Liabilities, Noncurrent All Adjustments to Compensation All Adjustments to Compensation [Member] Other items, net Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Other Item Business Combination [Axis] Business Combination [Axis] OTC Derivative Instrument Contracts Over-the-Counter [Member] Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year [Member] Net cash provided by operating activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation 6.500% notes due July 15, 2048 EQT 6.500% Notes Due July 15, 2048 [Member] EQT 6.500% Notes Due July 15, 2048 Other Stockholders' Equity, Other Income Statement [Abstract] Income Statement [Abstract] Document Transition Report Document Transition Report Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Investment, Name [Axis] Investment, Name [Axis] Intersegment eliminations and other Intersegment Eliminations [Member] Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] Schedule of Valuation Assumptions Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] Third-party Third-Party Contract [Member] Third-Party Contract City Area Code City Area Code Accumulated Other Comprehensive Loss AOCI Attributable to Parent [Member] Other revenues Other Revenues [Member] Other Revenues All Individuals All Individuals [Member] Name Forgone Recovery, Individual Name Weighted average remaining period (in years) Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] Statement Statement [Line Items] Total assets Total assets Assets Entity [Domain] Entity [Domain] Preferred stock issued (in shares) Preferred Stock, Shares Issued Upstream Upstream Segment [Member] Upstream Segment Equity Method Investment, Nonconsolidated Investee [Domain] Equity Method Investment, Nonconsolidated Investee [Domain] Operating Segments Operating Segments [Member] Grant date fair value per share Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value Interest expense, net Interest Expense, Nonoperating MVP Southgate Project MVP Southgate Project [Member] MVP Southgate Project [Member] Share-Based Compensation Plans Share-Based Payment Arrangement [Text Block] Energy [Domain] Energy [Domain] Total long-term debt, principal value Debt Instrument, Face Amount, Noncurrent Debt Instrument, Face Amount, Noncurrent PEO PEO [Member] Maximum amount of outstanding short-term loans at any time during the period Line of Credit Facility, Maximum Amount Outstanding During Period Prepaid expenses and other Prepaid Expenses, Other Assets, And Margin Requirements With Counterparties, Current Prepaid Expenses, Other Assets, And Margin Requirements With Counterparties, Current Compensation cost Share-Based Payment Arrangement, Expense Measurement Basis [Axis] Measurement Basis [Axis] Derivative instruments subject to master netting agreements Derivative Asset, Subject to Master Netting Arrangement, Liability Offset Goodwill Goodwill 5.500% notes due July 15, 2028 E Q T 5.500% Notes Due July 15, 2028 [Member] E Q T 5.500% Notes Due July 15, 2028 Forgone Recovery due to Violation of Home Country Law, Amount Forgone Recovery due to Violation of Home Country Law, Amount MVP A And MVP C MVP A And MVP C [Member] MVP A And MVP C Subsequent Event Type [Domain] Subsequent Event Type [Domain] Retained Earnings Retained Earnings [Member] Revolving credit facility Revolving Credit Facility [Member] Erroneously Awarded Compensation Recovery Erroneously Awarded Compensation Recovery [Table] Maximum additional collateral as percentage of derivative liability (in percent) Maximum Additional Collateral as Percentage of Derivative Liability The upper limit of the percentage of derivative liability that the entity may be required to post with counterparties. Beginning balance (in shares) Ending balance (in shares) Common Stock, Shares, Outstanding Increase (Decrease) in Stockholders' Equity Increase (Decrease) in Stockholders' Equity [Roll Forward] Award Timing Disclosures [Line Items] Debt issuance costs Payments of Debt Issuance Costs Net income (loss) attributable to EQT Corporation - Diluted (in dollars per share) Diluted (in dollars per share) Earnings Per Share, Diluted Entity Current Reporting Status Entity Current Reporting Status Net cash used in financing activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Total Shareholder Return Amount Total Shareholder Return Amount Strike price Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Strike Price Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Strike Price Cash flow hedging Cash Flow Hedging [Member] Income from investments Income from investments Unrealized Gain (Loss) on Investments Line of Credit Facility Line of Credit Facility [Line Items] Adjustments to reconcile net income to net cash provided by operating activities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity [Abstract] Schedule of Offsetting Assets Offsetting Assets [Table Text Block] Natural Gas Natural Gas [Member] Business Combination, Separately Recognized Transaction [Line Items] Business Combination, Separately Recognized Transaction [Line Items] Loss Contingency Nature [Axis] Loss Contingency Nature [Axis] Share-Based Payment Arrangement [Abstract] Cash flows from financing activities: Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract] Net property, plant and equipment Property, Plant, and Equipment, after Accumulated Depreciation, Depletion, and Amortization Sales of natural gas, natural gas liquids and oil Sales of natural gas, natural gas liquids and oil Revenue from Contract with Customer, Excluding Assessed Tax Unused commitment fee paid to maintain credit facility (in percent) Line of Credit Facility, Unused Capacity, Commitment Fee Percentage Schedule of Equity Method Investments Equity Method Investments [Table Text Block] Total other sources of revenue Other Income Equity Awards Adjustments, Footnote Equity Awards Adjustments, Footnote [Text Block] Underlying Securities Award Underlying Securities Amount Capital Unit, Class B Capital Unit, Class B [Member] Less: Comprehensive income attributable to noncontrolling interests Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest Fair value Estimate of Fair Value Measurement [Member] Other property, plant and equipment, at cost less accumulated depreciation Property, Plant, and Equipment, Other, Accumulated Depreciation Revenue from Contracts with Customers Revenue from Contract with Customer [Text Block] Number of compressor stations Number of Compressor Stations Number of Compressor Stations Other investing activities Payment for (Proceeds from) Other Investing Activity Address Type [Domain] Address Type [Domain] Segment Reporting [Table] Segment Reporting [Table] Contract with Customer, Sales Channel [Axis] Contract with Customer, Sales Channel [Axis] Schedule of Equity Method Investments [Table] Equity Method Investment [Table] All Trading Arrangements All Trading Arrangements [Member] Other Performance Measure, Amount Other Performance Measure, Amount Award Timing MNPI Considered Award Timing MNPI Considered [Flag] Operating income Operating income (loss) Total segment operating income Operating Income (Loss) Midstream Joint Venture Joint Venture Formation [Text Block] Revenue, remaining performance obligation Revenue, Remaining Performance Obligation, Amount Current Fiscal Year End Date Current Fiscal Year End Date Non-PEO NEO Average Total Compensation Amount Non-PEO NEO Average Total Compensation Amount Derivative [Line Items] Derivative [Line Items] Blackline Midstream Acquisition Business Combination [Text Block] Net derivative instruments Derivative Asset, Subject to Master Netting Arrangement, before Offset of Collateral Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year [Member] Dividends (in dollars per share) Common Stock, Dividends, Per Share, Declared Entity File Number Entity File Number Rule 10b5-1 Arrangement Adopted Rule 10b5-1 Arrangement Adopted [Flag] Investment owned Investment Owned, Fair Value Distributions to noncontrolling interests Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders 6.500% notes due July 1, 2027 EQT 6.500% Notes Due July 1, 2027 [Member] EQT 6.500% Notes Due July 1, 2027 Recovery of Erroneously Awarded Compensation Disclosure [Line Items] Senior notes Senior Notes 5.750% notes due February 1, 2034 E Q T 5.750% Notes Due February 1, 2034 [Member] E Q T 5.750% Notes Due February 1, 2034 Common stock, shares issued (in shares) Common Stock, Shares, Issued Measure: Measure [Axis] Investments in Unconsolidated Entities Equity Method Investments and Joint Ventures Disclosure [Text Block] MVP LLC Agreement MVP LLC Agreement [Member] MVP LLC Agreement Contract with Customer, Basis of Pricing [Axis] Contract with Customer, Basis of Pricing [Axis] Equity Components [Axis] Equity Components [Axis] Total Cost Debt Instrument, Repurchase Amount 7.75% debentures due July 15, 2026 EQT 7.75% Debentures Due July 15, 2026 [Member] EQT 7.75% Debentures Due July 15, 2026 Accounts receivable Increase (Decrease) in Accounts Receivable Product and Service [Domain] Product and Service [Domain] Income taxes, net Income Tax Paid, after Refund Received Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Entity Interactive Data Current Entity Interactive Data Current Less: Net income attributable to noncontrolling interests Net Income (Loss) Attributable to Noncontrolling Interest Deferred income taxes Deferred Income Tax Liabilities, Net Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Gain (loss) on derivatives Loss (gain) on derivatives Gain (loss) on derivatives Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net Entity Small Business Entity Small Business Comprehensive income attributable to EQT Corporation Comprehensive Income (Loss), Net of Tax, Attributable to Parent Termination Date Trading Arrangement Termination Date Fair Value, Recurring and Nonrecurring [Table] Fair Value, Recurring and Nonrecurring [Table] Payments to Acquire Productive Assets [Abstract] Payments to Acquire Productive Assets [Abstract] Compensation Actually Paid vs. Total Shareholder Return Compensation Actually Paid vs. Total Shareholder Return [Text Block] Blackline Midstream Acquisition Blackline Midstream Acquisition [Member] Blackline Midstream Acquisition Other postretirement benefits liability adjustment, net of tax benefit (expense) of $38, $53, $(140) and $82 Other postretirement benefits liability adjustment, net of tax Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax MNPI Disclosure Timed for Compensation Value MNPI Disclosure Timed for Compensation Value [Flag] Other current liabilities Other Liabilities, Current Other assets Other Other Assets, Noncurrent Document Type Document Type Principal Aggregate principal amount of debt redeemed Debt Instrument, Repurchased Face Amount Cash paid for acquisitions Payments to Acquire Businesses, Net of Cash Acquired Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Increase in asset retirement costs and obligations Asset Retirement Obligation, Period Increase (Decrease) Loss on debt extinguishment Loss on debt extinguishment Gain (Loss) on Extinguishment of Debt Firm reservation fees Fixed-Price Contract [Member] Fair Value as of Grant Date Award Grant Date Fair Value Other Nonconsolidated Investees, Other [Member] Transaction Market Method [Domain] Transaction Market Method [Domain] Remaining amount required to achieve base return Distribution Made to Limited Partner, Remaining Amount Required To Achieve Base Return Distribution Made to Limited Partner, Remaining Amount Required To Achieve Base Return Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] Operating and maintenance Operating Costs and Expenses Arrangement Duration Trading Arrangement Duration Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Local Phone Number Local Phone Number Affiliate Affiliate Contract [Member] Affiliate Contract Consolidation Items [Axis] Consolidation Items [Axis] Share-based compensation plans (in shares) Stock Issued During Period, Shares, Share-Based Compensation, Net Stock Issued During Period, Shares, Share-Based Compensation, Net Entity Address, Postal Zip Code Entity Address, Postal Zip Code Entity Registrant Name Entity Registrant Name Net premiums paid on debt extinguishment Payment for Debt Extinguishment or Debt Prepayment Cost Oil Oil Sales [Member] Oil Sales [Member] Income before income taxes Income before income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Insider Trading Policies and Procedures Not Adopted Insider Trading Policies and Procedures Not Adopted [Text Block] Sales of natural gas, natural gas liquids and oil Sales of natural gas, NGLs and oil Sales Of Natural Gas, NGLs And Oil At Production [Member] Sales Of Natural Gas, NGLs And Oil At Production Total operating revenues Total operating revenues Revenues Property, plant and equipment Property, Plant, and Equipment, before Accumulated Depreciation, Depletion, and Amortization Changed Peer Group, Footnote Changed Peer Group, Footnote [Text Block] Equity earnings from Company's investments Income (Loss) from Equity Method Investments Forgone Recovery due to Expense of Enforcement, Amount Forgone Recovery due to Expense of Enforcement, Amount Executive Category: Executive Category [Axis] 4.50% notes due January 15, 2029 EQT 4.50% Notes Due January 15, 2029 [Member] EQT 4.50% Notes Due January 15, 2029 Counterparty Name [Axis] Counterparty Name [Axis] LIABILITIES AND EQUITY Liabilities and Equity [Abstract] Schedule of Assets and Liabilities Measured at Fair Value on a Recurring Basis Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Award Type [Domain] Award Type [Domain] Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount Aggregate fair value of derivative instruments with credit-risk related contingencies Derivative, Net Liability Position, Aggregate Fair Value Fair Value Measurements Fair Value Disclosures [Text Block] Significant unobservable inputs (Level 3) Fair Value, Inputs, Level 3 [Member] Cash paid (received) during the period for: Supplemental Cash Flow Information [Abstract] Expected term in years Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Term Stock price at grant date Share Price Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] Business Combination, Separately Recognized Transaction [Table] Business Combination, Separately Recognized Transaction [Table] PEO Name PEO Name Geographical [Axis] Geographical [Axis] Weighted average interest rates (in percent) Line of Credit Facility, Interest Rate During Period Other segment assets Other Assets Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] Entity Tax Identification Number Entity Tax Identification Number Legal Entity [Axis] Legal Entity [Axis] Cash and cash equivalents at beginning of period Cash and cash equivalents at end of period Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Accounts payable Increase (Decrease) in Accounts Payable Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Aggregate Erroneous Compensation Not Yet Determined Aggregate Erroneous Compensation Not Yet Determined [Text Block] Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] Non-NEOs Non-NEOs [Member] Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year [Member] Financial Statements Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Comprehensive income Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Debt Instrument [Axis] Debt Instrument [Axis] Ownership Interest Ownership percentage (in percent) Equity Method Investment, Ownership Percentage Share-based compensation expense Share-Based Payment Arrangement, Noncash Expense MVP Boost Project MVP Boost Project [Member] MVP Boost Project Net derivative instruments Derivative Liability, Subject to Master Netting Arrangement, before Offset of Collateral Investment, Name [Domain] Investment, Name [Domain] Long-term Debt, Type [Domain] Long-Term Debt, Type [Domain] Net cash settlements paid on derivatives Gain (Loss) On Cash Settlements On Derivatives Not Designated as Hedges Gain (Loss) On Cash Settlements On Derivatives Not Designated as Hedges Net income (loss) attributable to EQT Corporation - Basic (in dollars per share) Basic (in dollars per share) Earnings Per Share, Basic Total current assets Assets, Current Statistical Measurement [Axis] Statistical Measurement [Axis] Insider Trading Arrangements [Line Items] Distribution allocation (percent) Subsidiary or Equity Method Investee, Distribution Percentage Subsidiary or Equity Method Investee, Distribution Percentage Total long-term debt, carrying value Long-Term Debt, Excluding Current Maturities Award Type [Axis] Award Type [Axis] Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Accounts receivable (less allowance for credit losses: $3,844 and $3,088) Accounts Receivable, after Allowance for Credit Loss, Current Retained earnings Retained Earnings (Accumulated Deficit) Commodity derivatives Commodity Contract [Member] Product and Service [Axis] Product and Service [Axis] EQT's revolving credit facility maturing July 23, 2030 Credit Facility Expiring July 23, 2030 [Member] Credit Facility Expiring July 23, 2030 Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table [Member] Capital Units by Class [Axis] Capital Units by Class [Axis] Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Common Stock Common Stock [Member] Loss on sale/exchange of long-lived assets Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal Blended volatility Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Volatility Rate Fair Value Measurement [Domain] Fair Value Measurement [Domain] Former Address [Member] Former Address [Member] Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Cover page. Cover [Abstract] Pipeline and other Pipeline And Other [Member] Pipeline, Net Marketing Services And Other Reclassification Reclassification, Comparability Adjustment [Policy Text Block] Dividend yield Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Dividend Rate Pipeline and other Other revenues Pipeline And Other Revenue Pipeline And Other Revenue MVP B MVP B [Member] MVP B Aggregate consideration Equity Method Investment, Aggregate Cost Derivative Contract [Domain] Derivative Contract [Domain] Equity Awards Adjustments Equity Awards Adjustments [Member] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] Hedging Relationship [Domain] Hedging Relationship [Domain] Total liabilities and equity Liabilities and Equity Non-Qualified Stock Options Share-Based Payment Arrangement, Option [Member] Noncontrolling interests in consolidated subsidiaries Equity, Attributable to Noncontrolling Interest Segments [Axis] Segments [Axis] Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Right-of-use assets obtained in exchange for lease liabilities Increase (Decrease) In Right-Of-Use Lease Assets And Lease Liabilities Increase (Decrease) In Right-Of-Use Lease Assets And Lease Liabilities Tabular List, Table Tabular List [Table Text Block] Vesting [Axis] Vesting [Axis] Other income Other income Other Nonoperating Income (Expense) Other operating expenses Corporate other operating expenses Other Operating Income (Expense), Net Name Awards Close in Time to MNPI Disclosures, Individual Name Average daily balance of short-term loans outstanding during the period Line of Credit Facility, Average Outstanding Amount Equity: Equity, Including Portion Attributable to Noncontrolling Interest [Abstract] Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested [Member] MVP C MVP C [Member] MVP C Preferred stock authorized (in shares) Preferred Stock, Shares Authorized Adjustment to Compensation: Adjustment to Compensation [Axis] Weighted average remaining term Oil and Gas Delivery Commitments and Contracts, Weighted Average Remaining Term Oil and Gas Delivery Commitments and Contracts, Weighted Average Remaining Term Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Interest, net of amount capitalized Interest Paid, Excluding Capitalized Interest, Operating Activity Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Credit Facility [Axis] Credit Facility [Axis] Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Name Measure Name 5.700% notes due April 1, 2028 E Q T 5.700% Notes Due April 1, 2028 [Member] E Q T 5.700% Notes Due April 1, 2028 Income Taxes Income Tax Disclosure [Text Block] Accounts payable Accounts Payable, Current Pay vs Performance Disclosure [Line Items] Years to vesting Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Vesting Term Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Vesting Term Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Other Other Noncash Income (Expense) Debt Instrument [Line Items] Debt Instrument [Line Items] Other current assets Increase (Decrease) in Other Current Assets Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Consideration to be paid Business Combination, Consideration Transferred Entity Filer Category Entity Filer Category Impairment and expiration of leases Gain (Loss) On Expiration And Impairment Of Lease Gain (Loss) On Expiration And Impairment Of Lease Schedule of Offsetting Liabilities Offsetting Liabilities [Table Text Block] Name Trading Arrangement, Individual Name Cash and cash equivalents Cash and Cash Equivalent Energy [Axis] Energy [Axis] Company Selected Measure Amount Company Selected Measure Amount Distributions from equity method investments Proceeds from Equity Method Investment, Distribution Equity Method Investments and Joint Ventures [Abstract] Equity Method Investments and Joint Ventures [Abstract] Depreciation, depletion and amortization Depreciation, depletion and amortization Depreciation, Depletion and Amortization Entity Address, Address Line Two Entity Address, Address Line Two Net income Net income Net income Net income Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Contract with Customer, Sales Channel [Domain] Contract with Customer, Sales Channel [Domain] Current assets: Assets, Current [Abstract] Non-PEO NEO Non-PEO NEO [Member] Senior Notes Senior Notes [Member] Entity Address, Address Line One Entity Address, Address Line One Income tax expense Income Tax Expense (Benefit) Transportation and processing Cost of Product and Service Sold Award Timing Method Award Timing Method [Text Block] Loss Contingency, Nature [Domain] Loss Contingency, Nature [Domain] Principles of Consolidation and Noncontrolling Interests Consolidation, Policy [Policy Text Block] Net change in cash and cash equivalents Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Volumetric-based fees Time-and-Materials Contract [Member] Option Tranche 3 Share-Based Payment Arrangement, Tranche Three [Member] Net income attributable to EQT Corporation Net Income (Loss) Attributable to Parent Long-term Debt, Type [Axis] Long-Term Debt, Type [Axis] Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Statement [Table] Statement [Table] Option Tranche 2 Share-Based Payment Arrangement, Tranche Two [Member] Restatement Determination Date: Restatement Determination Date [Axis] 3.625% notes due May 15, 2031 E Q T 3.625% Notes Due May 15, 2031 [Member] 3.625% senior notes Performance guarantee (in percent) Performance Guarantee, Remaining Capital Obligation, Percentage Performance Guarantee, Remaining Capital Obligation, Percentage Natural gas interstate pipeline (in miles) Oil And Gas, Length Of Pipeline Oil And Gas, Length Of Pipeline Schedule of Remaining Performance Obligations Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table Text Block] Production Oil and Gas, Result of Operation, Production Cost Derivative instruments, at fair value Gross derivative instruments recorded in the Condensed Consolidated Balance Sheets Asset derivative instruments, at fair value Derivative Asset, Subject to Master Netting Arrangement, before Offset Eureka's revolving credit facility maturing November 13, 2027 Credit Facility Expiring November 13, 2027 [Member] Credit Facility Expiring November 13, 2027 Midstream Joint Venture Midstream Joint Venture [Member] Midstream Joint Venture Share-based compensation plans Stock Issued During Period, Value, Share-Based Compensation, Net Stock Issued During Period, Value, Share-Based Compensation, Net Operating revenues: Revenues [Abstract] Net cash received (paid) for sale/exchange of assets Payments For (Proceeds From) Sale Or Exchange of Assets Payments For (Proceeds From) Sale Or Exchange of Assets Collateral posted Collateral Already Posted, Aggregate Fair Value Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block] Derivative Instruments and Hedging Activities Disclosure [Abstract] Derivative Instruments and Hedging Activities Disclosure [Abstract]