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[Member] Murray Energy Corporation Contingencies Commitments and Contingencies, Policy [Policy Text Block] Gain (Loss) on Commodity Derivative Instruments (Gain) Loss on Commodity Derivative Instruments Gain (Loss) on Commodity Derivative Instruments Gain (Loss) on Commodity Derivative Instruments Gain (Loss) on Hedging Activity Property, Plant and Equipment, Type [Axis] Long-Lived Tangible Asset [Axis] Balance at beginning of period Balance at end of period SEC Schedule, 12-09, Valuation Allowances and Reserves, Amount Total Other Accrued Liabilities Other Accrued Liabilities Allowance for Credit Losses Accounts Receivable, Allowance for Credit Loss, Current Royalty Interest Royalty Interest [Member] Royalty Interest Other Significant Noncash Transaction, Name [Domain] Other Significant Noncash Transaction, Name [Domain] 2022 Lessee, Operating Lease, Liability, to be Paid, Year Two Selling, General and Administrative Costs Results of Operations, General and Administrative Related to 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Assumptions Used Calculating Benefit Obligation, Weighted-Average Interest Crediting Rate Accounts and Notes Receivable: Accounts and Financing Receivable, after Allowance for Credit Loss, Current [Abstract] Other Gas Assets Capitalized Costs, Other Gas Assets Capitalized Costs, Other Gas Assets Expected volatility (as a percent) Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate Natural Gas, NGLs and Oil Revenue Total Natural Gas, NGL and Oil Revenue Oil and Gas Service [Member] Less: Interest Lessee, Operating Lease, Liability, Undiscounted Excess Amount Schedule of Shares of Common Stock Outstanding Schedule of Stock by Class [Table Text Block] Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] Level 1 Fair Value, Inputs, Level 1 [Member] More than 5 years Unrecorded Unconditional Purchase Obligation, to be Paid, after Year Five Gas Wholesalers Gas Customers [Member] Gas Customers [Member] Pre-tax discounted basis, plugging and abandonment costs Development Costs, Plugging And Abandonment Costs, Present Value On Discounted Basis Development Costs, Plugging And Abandonment Costs, Present Value On Discounted Basis Schedule of Accounts, Notes, Loans and Financing Receivable [Table] Schedule of Accounts, Notes, Loans and Financing Receivable [Table] Supplies Inventories Increase (Decrease) in Inventories Restricted Cash Restricted Cash, Less Current Portion Restricted Cash and Cash Equivalents, Noncurrent Depreciation, Depletion and Amortization E&P Depreciation, Depletion, and Amortization E&P Depreciation, Depletion, and Amortization Number of Shares Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Increase (Decrease) in Capitalized Exploratory Well Costs that are Pending Determination of Proved Reserves [Roll Forward] Increase (Decrease) in Capitalized Exploratory Well Costs that are Pending Determination of Proved Reserves [Roll Forward] Obligations Settled Asset Retirement Obligation, Cash Paid to Settle Purchase Commitment, Excluding Long-term Commitment [Domain] Purchase Commitment, Excluding Long-term Commitment [Domain] Capital in Excess of Par Value Additional Paid-in Capital [Member] Upward revision from increased performance (energy) Proved Developed and Undeveloped Reserve, Revision of Previous Estimate For Increased Performance (Energy) Proved Developed and Undeveloped Reserve, Revision of Previous Estimate For Increased Performance (Energy) Cardinal States Gathering Company Credit Facility Cardinal States Facility [Member] Cardinal States Facility Total Other Assets Other Assets Adjustment For Actuarially Determined Liabilities Adjustment For Actuarially Determined Liabilities [Member] Adjustment For Actuarially Determined Liabilities Downward revision due to plan changes (energy) Proved Developed and 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Interest Working Interest [Member] Working Interest Depreciation, Depletion and Amortization Results of Operations, Depreciation, Depletion, Amortization and Accretion Income Statement [Abstract] Income Statement [Abstract] 3 - 5 years Unrecorded Unconditional Purchase Obligation, to be Paid, Year Five Accumulated Other Comprehensive Income (Loss) AOCI Attributable to Parent [Member] Net leverage ratio Debt Instrument, Net Leverage Ratio Debt Instrument, Net Leverage Ratio Long-term Debt, Other Disclosures [Abstract] Long-term Debt, Other Disclosures [Abstract] Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Deferred tax asset related to state operating losses Deferred Tax Assets, Operating Loss Carryforwards, State and Local Use of Estimates Use of Estimates, Policy [Policy Text Block] Schedule of Assets Amortized by Units of Production [Table] [Table] Schedule of Assets Amortized by Units of Production [Table] [Table] Schedule of Assets Amortized by Units of Production [Table] [Table] Unrecorded Unconditional Purchase Obligation by Category of Item Purchased [Axis] Unrecorded Unconditional Purchase Obligation by Category of Item Purchased [Axis] Derivative notional amount Derivative, Nonmonetary Notional Amount, Volume Revisions (energy) Proved Developed and Undeveloped Reserve, Revision of Previous Estimate (Energy) Schedule of Assumptions Used Defined Benefit Plan, Assumptions [Table Text Block] Purchased Software Software and Software Development Costs [Member] PSUs issued (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Issued In Period, Result of Payout Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Issued In Period, Result of Payout Other Operating Expense Other Expenses Schedule of Nonvested Performance-based Units Activity Schedule of Nonvested 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(Decrease) in Prepaid Expense Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Option Indexed to Issuer's Equity, Type [Domain] Option Indexed to Issuer's Equity, Type [Domain] Year 2026-2030 Defined Benefit Plan, Expected Future Benefit Payment, after Year Five for Next Five Years Producing Wells, Interest [Domain] Producing Wells, Interest [Domain] Producing Wells, Interest Net Operating Loss- Federal Federal net operating losses Deferred Tax Assets, Operating Loss Carryforwards, Domestic Revolving Credit Facilities Short-term Debt [Text Block] Entity [Domain] Entity [Domain] Accrued Interest Increase (Decrease) in Interest Payable, Net Shares Withheld for Taxes Payment, Tax Withholding, Share-based Payment Arrangement Timing and Other Standardized Measure of Discounted Future Net Cash Flow of Proved Oil and Gas Reserves, Timing and Other Standardized Measure of Discounted Future Net Cash Flow of Proved Oil and Gas Reserves, Timing and Other Goodwill acquired during period Goodwill, Acquired During Period Less: Comprehensive Income Attributable to Noncontrolling Interests Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Noncontrolling Interest Supplemental Quarterly Information (unaudited) Quarterly Financial Information [Text Block] Gas Wells and Related Equipment Gas wells and related equipment Gas Wells and Related Equipment Useful life of property, plant and equipment Property, Plant and Equipment, Useful Life Purchased Gas Costs Production Royalty Interests and Purchased Gas Costs Production Royalty Interests and Purchased Gas Costs Goodwill [Line Items] Goodwill [Line Items] Lessee, Lease, Description [Line Items] Lessee, Lease, Description [Line Items] Development Costs Incurred During the Period Previously Estimated Development Costs Incurred Property Acquisitions: Costs Incurred, Acquisition of Oil and Gas Properties [Abstract] Fair Value Disclosures [Abstract] Fair Value Disclosures [Abstract] Subsegments Consolidation Items [Axis] Subsegments Consolidation Items [Axis] Condensate & Crude Oil Crude Oil [Member] Share-based Payment Arrangement [Abstract] Share-based Payment Arrangement [Abstract] Net (Payments on) Proceeds from CNXM Revolving Credit Facility Net Proceeds from Revolver - MLP Net Proceeds from Revolver - MLP Schedule of Allowance for Credit Loss Accounts Receivable, Allowance for Credit Loss [Table Text Block] NJR Energy Services Company NJR Energy Services Company [Member] NJR Energy Services Company [Member] Current Portion of Operating Lease Obligations (Note 13) Current Portion of Operating Lease Obligations Operating Lease, Liability, Current Credit facility, modification period Debt Instrument Modification Period Debt Instrument Modification Period Finance Leases Right-of-Use Asset Obtained in Exchange for Finance Lease Liability Schedule of Short-term Debt [Table] Schedule of Short-term Debt [Table] Exploratory wells drilled but uncompleted Exploratory Wells, 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Equipment Surface Land And Other Equipment Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Reduction in income tax expense due to non-controlling interest Non-Controlling Interest Effective Income Tax Rate Reconciliation, Noncontrolling Interest Income (Loss), Amount Total payment and cost to the Plan Defined Contribution Plan, Cost Unproved Properties Costs Incurred, Acquisition of Unproved Oil and Gas Properties Finance leases, weighted average discount rate Finance Lease, Weighted Average Discount Rate, Percent Natural Gas Basis Swaps (Bcf) Basis Only Swaps Basis Swaps Basis Swap [Member] Other Deferred Adjustments Effective Income Tax Rate Reconciliation, Other Deferred Adjustments, Percent Effective Income Tax Rate Reconciliation, Other Deferred Adjustments, Percent Other Commitments [Axis] Other Commitments [Axis] Less than 1 year Unrecorded Unconditional Purchase Obligation, to be Paid, Year One Commodity Swap Commodity Swap [Member] Commodity Swap 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Southeastern Asset Management, Inc. [Member] Southeastern Asset Management, Inc. 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Revenue Revenue from contracts with customers Total Segment Revenue from Contracts with External Customers Revenue from Contract with Customer, Excluding Assessed Tax Net Wells And Acreage, Net [Abstract] Wells And Acreage, Net [Abstract] RSUs granted in conversion, as a result of the CNXM Merger (in shares) Share-Based Compensation Arrangement By Share-Based Payment Award, Equity Instruments Other Than Options, Grants From Conversions In Period Share-Based Compensation Arrangement By Share-Based Payment Award, Equity Instruments Other Than Options, Grants From Conversions In Period Business Acquisition [Axis] Business Acquisition [Axis] Geographical [Domain] Geographical [Domain] Central Pennsylvania and Southwest Pennsylvania Central Pennsylvania And Southwest Pennsylvania [Member] Central Pennsylvania And Southwest Pennsylvania Conversion rate Debt Instrument, Convertible, Conversion Ratio Issuance Related to CNXM Merger (in shares) Stock Issued During Period, Shares, Acquisitions Oil and Gas Net Production, Average Sales Price and Average Production Costs Disclosure Oil and Gas, Average Sale Price and Production Cost [Table Text Block] Midstream CNXM CNXM [Member] CNXM [Member] Prepaid Expense Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Prepaid Expense and Other Assets Accrued Interest Interest Payable, Current Entity Voluntary Filers Entity Voluntary Filers Transaction costs Business Combination, Acquisition Related Costs Payment terms for contract with customers Contracts With Customers, Payment Terms Contracts With Customers, Payment Terms Credit Facility [Axis] Credit Facility [Axis] Fair Value of Liabilities Assumed: Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities [Abstract] Preferred Stock, Issued (in shares) Preferred Stock, Shares Issued Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract] Defined 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Accretion Standardized Measure of Discounted Future Net Cash Flow Relating to Proved Oil and Gas Reserves, Accretion of Discount Leases Lessee, Finance Leases [Text Block] Accretion Expense Accretion Expense Schedule of Recognized Identified Assets Acquired and Liabilities Assumed Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block] Fair Value, Assets Measured on Recurring Basis Fair Value, Assets Measured on Recurring Basis [Table Text Block] Debt Instrument, Issuance, Period [Domain] Debt Instrument, Issuance, Period [Domain] Debt Instrument, Issuance, Period Gas Well Closing Deferred Tax Assets - Gas Well Closing Deferred Tax Assets - Gas Well Closing Borrowings outstanding Long-term Line of Credit Purchase of Capped Call Net impact of Capped Calls Adjustments To Additional Paid In Capital, Purchase Of Capped Call Adjustments To Additional Paid In Capital, Purchase Of Capped Call Funded Status: Defined Benefit Plan, Funded (Unfunded) Status of 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Pensions Derivative Instruments (Note 19) Total Current Liabilities Derivative Liability, Current Amounts Recognized in Accumulated Other Comprehensive Loss Consist of: Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss) [Abstract] ASU 2018-02 Reclassification Tax Cuts and Jobs Act, Reclassification from AOCI to Retained Earnings, Tax Effect Title of 12(b) Security Title of 12(b) Security Schedule of Accrued Liabilities Schedule of Accrued Liabilities [Table Text Block] Accounts and Notes Receivable Increase (Decrease) in Accounts and Notes Receivable Total Other Intangible Assets, net Finite-Lived Intangible Assets, Net Weighted average fair value of grants (in usd per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value Beginning balance (volume) Ending balance (volume) Proved Developed and Undeveloped Reserves, Net Transportation Charges Accrued Transportation Charges Accrued Transportation Charges Vesting [Domain] Vesting [Domain] Maturity of Lease Liability, Financing Finance Lease, Liability, Fiscal Year Maturity [Table Text Block] Interest Expense Interest Expense Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward] Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward] Expected forfeiture rate (as a percent) Share Based Comp expected forfeiture rate Share Based Comp expected forfeiture rate Depreciation, Depletion and Amortization Depreciation, depletion and amortization Depreciation, Depletion and Amortization Anti-Dilutive Performance Share Units Performance Share Units Performance Share Units [Member] Performance Share Units Schedule of Components of Income Tax Expense (Benefit) Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] Ownership percentage in equity method investment Noncontrolling Interest, 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Recurring and Nonrecurring [Table] Fair Value, Recurring and Nonrecurring [Table] Accounts Payable Increase (Decrease) in Accounts Payable Unrealized Loss on Interest Rate Swaps Unrealized Gain (Loss) on Derivatives Dividends Declared Per Share (in usd per share) Common Stock, Dividends, Per Share, Cash Paid Capitalized exploratory well costs Balance, Beginning of Period Balance, End of Period Capitalized Exploratory Well Costs Debt Instrument [Axis] Debt Instrument [Axis] Asset Retirement Obligations Asset Retirement Obligation Disclosure [Text Block] Antidilutive Securities, Name [Domain] Antidilutive Securities, Name [Domain] Quarterly Financial Information Quarterly Financial Information [Table Text Block] Operating Segments Operating Segments [Member] Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Net Distributions from Equity Affiliates Proceeds Of Distributions From Equity Affiliates, Investing Activities Proceeds Of Distributions From Equity Affiliates, Investing Activities Adjustments to Reconcile Net (Loss) Income to Net Cash Provided by Continuing Operating Activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Unconditional Purchase Obligation, Category of Goods or Services Acquired [Domain] Unconditional Purchase Obligation, Category of Goods or Services Acquired [Domain] Accounts Receivable Trade Before Allowance for Credit Losses Accounts Receivable, before Allowance for Credit Loss, Current Revenue from Contract with Customer [Abstract] Revenue from Contract with Customer [Abstract] Shallow Oil, Gas, and CBM Assets in Pennsylvania and West Virginia Shallow Oil, Gas, and CBM Assets in Pennsylvania and West Virginia [Member] Shallow Oil, Gas, and CBM Assets in Pennsylvania and West Virginia [Member] Other Operating Income Other Operating Income Variable Lease Cost Variable Lease, Cost Proved Developed and Undeveloped Oil and Gas Reserve Quantities [Table] Proved Developed and Undeveloped Oil and Gas Reserve Quantities [Table] Sales of Reserves In-Place (volume) Proved Developed and Undeveloped Reserves, Sales of Minerals in Place Loss Contingencies by Nature of Contingency [Axis] Loss Contingency Nature [Axis] Projected Benefit Obligation Defined Benefit Plan, Pension Plan with Accumulated Benefit Obligation in Excess of Plan Assets, Projected Benefit Obligation Recognition period, weighted average Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition CNXM Revolving Credit Facility Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Long-term Debt Subsequent Event Subsequent Event [Member] Reclassifications Reclassification, Comparability Adjustment [Policy Text Block] Period from reserves booking for proved undeveloped locations to be fully developed Proved Undeveloped Reserves, Period To Be Fully Developed Proved Undeveloped Reserves, Period To Be Fully Developed Concentration Risk Type [Axis] Concentration Risk Type [Axis] Fair value of performance share units vested Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Remaining Contractual Te Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Remaining Contractual Te Production Costs Future Net Cash Flows Relating to Proved Oil and Gas Reserves, Production Costs Extension and Discoveries (volume) Proved Developed and Undeveloped Reserves, Extensions, Discoveries, and Additions Contractual Interest Expense Interest Expense, Debt, Excluding Amortization Proved Developed Acreage Oil and Gas, Developed Acreage, Net Fair Value Estimate of Fair Value Measurement [Member] Short-term Debt, Other Disclosures [Abstract] Short-term Debt, Other Disclosures [Abstract] Gain on Asset Sales and Abandonments, net Net gain (loss) on sale Gain (Loss) on Disposition of Assets Operating Lease Obligations (Note 13) Operating Lease Obligations Operating Lease, Liability, Noncurrent Estimated annual amortization expense expected, 2024 Finite-Lived Intangible Asset, Expected Amortization, Year Four Actuarially Determined Long-Term Liability Adjustments (Net of tax: $914, $1,664, $(792)) Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax Increase in available borrowings Line of Credit Facility, Maximum Borrowing Capacity, Accordion Feature Line of Credit Facility, Maximum Borrowing Capacity, Accordion Feature Assets amortized by units of production Assets Amortized By Units Of Production [Member] Assets amortized by units of production [Member] Asset Exchange Agreement with HG Energy Asset Exchange Agreement with HG Energy [Member] Asset Exchange Agreement with HG Energy [Member] Accrual to Tax Return Reconciliation Effective Income Tax Rate Reconciliation, Tax Contingency, Percent Current Assets: Assets, Current [Abstract] Accrued liabilities for tax penalties Unrecognized Tax Benefits, Income Tax Penalties Accrued Effect of Equity Compensation Effective Income Tax Rate Reconciliation, Tax Expense (Benefit), Share-based Payment Arrangement, Amount Number of retirees Number Of Retired Employees Number Of Retired Employees Amount available under the current stock repurchase program Stock Repurchase Program, Remaining Authorized Repurchase Amount Subsegments [Domain] Subsegments [Domain] Comprehensive (Loss) Income Attributable to CNX Resources Shareholders Comprehensive Income (Loss), Net of Tax, Attributable to Parent 2023 Finance Lease, Liability, to be Paid, Year Three Expected dividend yield (as a percent) Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate Preferred Share Purchase Rights Preferred Share Purchase Rights [Member] Preferred Share Purchase Rights [Member] Documents Incorporated by Reference Documents Incorporated by Reference [Text Block] 2021 Long-Term Debt, Maturity, Year One Schedule of Effective Income Tax Rate Reconciliation Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] Rate of Compensation Increase Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Rate of Compensation Increase Release of valuation allowance - deductions SEC Schedule, 12-09, Valuation Allowances and Reserves, Deduction Proved Properties Costs Incurred, Acquisition of Oil and Gas Properties with Proved Reserves Legal Entity [Axis] Legal Entity [Axis] City Area Code City Area Code Acquisitions And Dispositions Acquisitions And Dispositions Disclosure [Text Block] This element may be used to capture disclosure pertaining to acquisitions and dispositions. For acquisitions, description of a business acquisition (or series of individually immaterial business combinations) planned, initiated, or completed during the period, including background, timing, and allocation of acquisition costs. For dispositions, disclosure includes the facts and circumstances leading to the completed or expected disposal, manner and timing of disposal, the gain or loss recognized in the income statement and the income statement caption that includes that gain or loss, and the segment in which the disposal group was reported. Document Period End Date Document Period End Date Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] 1 - 3 years Unrecorded Unconditional Purchase Obligation, to be Paid, Year Three Fair value of previously held equity interest Fair Value of Previously Held Equity Interest Business Combination, Step Acquisition, Equity Interest in Acquiree, Fair Value Production, Ad Valorem and Other Fees Production Tax Expense Share repurchase program, authorized amount Stock Repurchase Program, Authorized Amount Net (Loss) Income Net (Loss) Income Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Total Average Sales Price Including Effects of Commodity Derivative Financial Settlements (per Mcfe) Average gas sales price including effects of financial settlements (per thousand cubic feet) Average gas sales price including effects of financial settlements (per thousand cubic feet) Disaggregation of Revenue Disaggregation of Revenue [Table Text Block] Impairment of Long-Lived Assets Impairment or Disposal of Long-Lived Assets, Policy [Policy Text Block] Payments on Long-Term Notes Payments On Long Term Notes Including Redemption Premium Payments On Long Term Notes Including Redemption Premium Short-Term Incentive Compensation Employee-related Liabilities Obligations Incurred Asset Retirement Obligation, Liabilities Incurred Quarterly Financial Information Disclosure [Abstract] Quarterly Financial Information Disclosure [Abstract] Coalbed Methane Coalbed Methane [Member] Coalbed Methane Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] Stock-Based Compensation Share-based Payment Arrangement, Noncash Expense Senior Notes due March 2027 at 7.25% Senior Notes Due March 2027 [Member] Senior Notes Due March 2027 [Member] Cover [Abstract] Cover [Abstract] Shares Withheld for Taxes Shares Granted, Value, Share-based Payment Arrangement, Forfeited Retirement of Common Stock (in shares) Stock Repurchased and Retired During Period, Shares Company's matching contribution, percentage Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay Accounts Payable Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable Return on Equity Investment Proceeds from Equity Method Investment, Distribution Derivative Instruments, Gain (Loss) by Hedging Relationship, by Income Statement Location, by Derivative Instrument Risk [Table] Derivative Instruments, Gain (Loss) [Table] Long-term Debt Including Current Maturities Net Carrying Amount Long-Term Debt (Excluding Debt Issuance Costs) Long-term Debt Minimum current ratio minimum current ratio per credit facility minimum current ratio per credit facility Leases Lessee, Operating Leases [Text Block] Total Acreage Total Acreage - Gross Total acreage Productive Wells [Line Items] Productive Wells [Line Items] Service Cost Defined Benefit Plan, Service Cost Asset Retirement Obligations (Note 7) Asset Retirement Obligations, Noncurrent Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] Customer Relationships Customer Relationships [Member] Cost of Goods and Services Sold Exploration expense Cost of Goods and Services Sold Finance Lease Cost: Lease, Cost [Abstract] Total Costs and Expenses Costs and Expenses Award Date [Domain] Award Date [Domain] Equity Components [Axis] Equity Components [Axis] Asset Retirement Obligations Asset Retirement Obligation [Policy Text Block] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Total Deferred Tax Assets Deferred Tax Assets, Gross Minimum Minimum [Member] Total Assets Acquired Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets Standardized Measure of Discounted Future Cash Flows Relating to Proved Reserves Disclosure Standardized Measure of Discounted Future Cash Flows Relating to Proved Reserves Disclosure [Table Text Block] Award Date [Axis] Award Date [Axis] Accumulated Benefit Obligation Defined Benefit Plan, Plan with Accumulated Benefit Obligation in Excess of Plan Assets, Accumulated Benefit Obligation Schedule of Cash Flow, Supplemental Disclosures Schedule of Cash Flow, Supplemental Disclosures [Table Text Block] Increase in standardized measure of discounted net cash flows Standardized Measure of Discounted Future Net Cash Flow of Proved Oil and Gas Reserves, Period Increase (Decrease) Less: Net Income Attributable to Non-Controlling Interest Net Income (Loss) Attributable to Noncontrolling Interest Recognized Net Actuarial Loss Defined Benefit Plan, Amortization of Gain (Loss) Gain on Asset Sales and Abandonments, net Gain (Loss) on Disposition of Other Assets Entity Interactive Data Current Entity Interactive Data Current Net Periodic Benefit Cost Defined Benefit Plan, Net Periodic Benefit Cost (Credit) Exercised (in usd per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Restrictions on Cash and Cash Equivalents Restrictions on Cash and Cash Equivalents [Table Text Block] Cash Flows from Operating Activities: Net Cash Provided by (Used in) Operating Activities [Abstract] Proved Undeveloped Acreage Oil and Gas, Undeveloped Acreage, Gross Share-based Compensation, Stock Options, Activity Share-based Payment Arrangement, Option, Activity [Table Text Block] Stock-Based Compensation Share-based Payment Arrangement [Policy Text Block] SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] Reconciliation of Revenue from Segments to Consolidated [Table] Reconciliation of Revenue from Segments to Consolidated [Table] Derivative [Table] Derivative [Table] Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] 2021 Defined Benefit Plan, Expected Future Benefit Payment, Year One Total Deferred Tax Liabilities Deferred Tax Liabilities, Gross Accounts Receivable, Allowance for Credit Loss [Roll Forward] Accounts Receivable, Allowance for Credit Loss [Roll Forward] Number of reportable segments Number of Reportable Segments Other Expense (Income) Other Nonoperating Income (Expense) [Abstract] Convertible 2.25% Senior Notes Due 2026 Convertible 2.25% Senior Notes Due 2026 [Member] Convertible 2.25% Senior Notes Due 2026 CNX CNX [Member] CNX Charged to expense - additions SEC Schedule, 12-09, Valuation Allowances and Reserves, Additions, Charge to Cost and Expense Effective yield (as a percent) Debt Instrument, Interest Rate, Effective Percentage Consolidation Items [Axis] Consolidation Items [Axis] Discount on Convertible Notes Deferred Tax Liabilities, Deferred Expense, Debt Discount Deferred Tax Liabilities, Deferred Expense, Debt Discount Trade (Note 17) Receivables related to contracts with customers Total Accounts Receivable Trade Accounts Receivable, after Allowance for Credit Loss, Current Impairment of Goodwill Impairment Goodwill, Impairment Loss Net Amount Recognized Accumulated Other Comprehensive (Income) Loss, Defined Benefit Plan, after Tax Total Lease Payments Lessee, Operating Lease, Liability, to be Paid Other Deferred Tax Assets, Other Threshold trading days Debt Instrument, Convertible, Threshold Trading Days Investment Plan Pension and Other Postretirement Plans, Nonpension Benefits, Policy [Policy Text Block] Accrued liability relating to uncertain tax positions Unrecognized Tax Benefits, Interest on Income Taxes Accrued Interest Credited Rate Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Weighted-Average Interest Crediting Rate Debt Instrument, Redemption, Period [Domain] Debt Instrument, Redemption, Period [Domain] Operating Leases: Operating Lease, Lease Income [Abstract] Operating Leases Operating Leases, Future Minimum Payments Receivable [Abstract] Recoverable Income Taxes Increase (Decrease) in Income Taxes Sales of Reserves In-Place Decrease Due to Sales of Minerals in Place Common Stock Outstanding [Roll Forward] Common Stock Outstanding [Roll Forward] Common Stock Outstanding Proved undeveloped acreage Proved Undeveloped Acreage Oil and Gas, Undeveloped Acreage, Net Benefit through realization of the Federal NOLs Tax Cuts And Jobs Act Of 2017, Incomplete Accounting, Change In Tax Rate, Federal Net Operating Loss Carryback, Provisional Income Tax Expense (Benefit) Tax Cuts And Jobs Act Of 2017, Incomplete Accounting, Change In Tax Rate, Federal Net Operating Loss Carryback, Provisional Income Tax Expense (Benefit) Document Transition Report Document Transition Report Debt Instrument, Redemption, Period [Axis] Debt Instrument, Redemption, Period [Axis] Impairment of Exploration and Production Properties Impairment of proved and unproved properties Impairment of Oil and Gas Properties Title of Individual [Axis] Title of Individual [Axis] Deferred: Deferred Income Tax Expense (Benefit), Continuing Operations [Abstract] Net Changes in Sales Prices and Production Costs Net Increase (Decrease) in Sales and Transfer Prices and Production Costs Unrecorded Unconditional Purchase Obligation [Line Items] Unrecorded Unconditional Purchase Obligation [Line Items] Other Deferred Adjustments Effective Income Tax Rate Reconciliation, Other Deferred Adjustments, Amount Effective Income Tax Rate Reconciliation, Other Deferred Adjustments, Amount Restricted Cash Restricted Cash, Current Portion Restricted Cash and Cash Equivalents, Current Senior Notes due April 2023 Senior Notes due April 2023 [Member] Senior Notes due April 2023 [Member] Level 2 Fair Value, Inputs, Level 2 [Member] Cash consideration received in sale of oil and gas assets Disposal Group, Including Discontinued Operation, Consideration Vesting [Axis] Vesting [Axis] Current: Current Income Tax Expense (Benefit), Continuing Operations [Abstract] Oil/Condensate Revenue Condensate [Member] Condensate [Member] Revisions Due to Plan Changes Plan Changes [Member] Plan Changes [Member] Advance Gas Royalties Deferred Tax Liabilities, Advance Royalties Deferred Tax Liabilities, Advance Royalties Financial Guarantees Financial Guarantee [Member] Gathering and Transmission Gathering and Transmission [Member] Gathering and Transmission [Member] Subsequent Event [Line Items] Subsequent Event [Line Items] Credit Facility [Domain] Credit Facility [Domain] Initial conversion price (in usd per share) Debt Instrument, Convertible, Conversion Price Other Other Customers [Member] Other Customers Basic (in usd per share) Basic (Loss) Earnings Per Share (in usd per share) Earnings Per Share, Basic Income tax benefit capped call Additional Paid In Capital, Capped Calls Tax Impact Additional Paid In Capital, Capped Calls Tax Impact Unrecognized tax benefits that would impact effective tax rate Unrecognized Tax Benefits that Would Impact Effective Tax Rate Expected term in years Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term Entity File Number Entity File Number Expired (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Expirations in Period Noncurrent Liabilities Liability, Defined Benefit Plan, Noncurrent Curtailment gain due to plan freeze Curtailment Gain Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Curtailment Accrued Other Taxes Accrual for Taxes Other than Income Taxes, Current Rate of Compensation Increase Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Rate of Compensation Increase Operating leases, weighted average remaining lease term Operating Lease, Weighted Average Remaining Lease Term Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets [Abstract] Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets [Abstract] Net Obligation Recognized Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position Purchase Commitment Purchase Commitment [Member] Prior Service Cost Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, Prior Service Cost (Credit), before Tax Type of Reserve [Domain] Type of Reserve [Domain] Stock-based compensation expense Share-based Payment Arrangement, Expense Maximum net leverage ratio Interest Ratio per Credit Facility Covenant Interest Ratio per Credit Facility Covenant Goodwill and Intangible Assets Disclosure [Abstract] Goodwill and Intangible Assets Disclosure [Abstract] Valuation allowance on foreign tax credits valuation allowance on foreign tax credits valuation allowance on foreign tax credits Disposal Group Name [Axis] Disposal Group Name [Axis] Impairment of Other Intangible Assets Impairment of intangible assets Impairment of other intangibles Impairment of Intangible Assets, Finite-lived Document Annual Report Document Annual Report Salary Retirement Liability, Defined Benefit Pension Plan, Current Aggregate intrinsic value, exercisable Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value Deferred tax benefit from stock-based compensation Share-based Payment Arrangement, Expense, Tax Benefit 2024 Finance Lease, Liability, to be Paid, Year Four Undeveloped reserves transferred to developed undeveloped reserves transferred to developed undeveloped reserves transferred to developed Production (volume) Proved Developed and Undeveloped Reserves, Production Position [Axis] Position [Axis] Retirement Benefits [Abstract] CNX Revolving Credit Facility CNX Revolving Credit Facility [Member] CNX Revolving Credit Facility [Member] Receivable [Domain] Receivable [Domain] Subsequent Event [Table] Subsequent Event [Table] Issuance Related to Stock-Based Compensation (in shares) Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Total Identifiable Net Assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net Noncontrolling Interest Stockholders' Equity Attributable to Noncontrolling Interest Granted (in usd per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Senior Notes due in January 2029 Senior Notes due in January 2029 [Member] Senior Notes due in January 2029 Investment in Partnership Deferred Tax Liabilities, Investment in Noncontrolled Affiliates Cash Flows from Investing Activities: Net Cash Provided by (Used in) Investing Activities [Abstract] CSG Holdings II LLC Credit Facility CSG Holdings Facility [Member] CSG Holdings Facility Valuation Allowance by Deferred Tax Asset [Axis] Valuation Allowance by Deferred Tax Asset [Axis] (Loss) Earnings Per Share: Earnings Per Share, Basic And Diluted1 [Abstract] Earnings Per Share, Basic And Diluted1 Other Deferred Tax Liabilities, Other Non-Controlling Interest Effective Income Tax Rate Reconciliation, Noncontrolling Interest Income (Loss), Percent Total Average Sales Price Before Effects of Commodity Derivative Financial Settlements (per Mcfe) Average Gas Sales Price before effects of financial settlements Average Gas Sales Price before effects of financial settlements Discretionary contributions to the Plan, percentage Defined Contribution Plan, Employer Discretionary Contribution Percent Defined Contribution Plan, Employer Discretionary Contribution Percent Statement of Comprehensive Income [Abstract] Statement of Comprehensive Income [Abstract] Other Other Gas [Member] Other Gas Federal Funds Open Rate Federal Funds Open Rate [Member] Federal Funds Open Rate [Member] Purchase of Capped Call Related to Convertible Senior Notes Cost incurred with Capped Calls Payments For Purchase Of Capped Call Related To Convertible Debt Payments For Purchase Of Capped Call Related To Convertible Debt Increase in reserve due to decrease in operating costs (energy) Proved Developed And Undeveloped Reserve, Change Due To Change In Operating Costs (Energy) Proved Developed And Undeveloped Reserve, Change Due To Change In Operating Costs (Energy) Concentration Risk Type [Domain] Concentration Risk Type [Domain] Operating leases rent expense Operating Leases, Rent Expense, Net Plan Amendments Defined Benefit Plan, Benefit Obligation, Increase (Decrease) for Plan Amendment TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY Liabilities and Equity Loss Contingencies [Line Items] Loss Contingencies [Line Items] Accumulated Other Comprehensive Loss Accumulated Other Comprehensive Income (Loss), Net of Tax Income Taxes Income Tax Disclosure [Text Block] Portion at Fair Value Measurement [Member] Portion at Fair Value Measurement [Member] Schedules of Concentration of Risk, by Risk Factor Schedules of Concentration of Risk, by Risk Factor [Table Text Block] Operating Lease Cost Operating Lease, Cost Reduction to unrecognized tax benefits, from position taken on state tax return Reduction in Unrecognized Tax Benefits Because of the Lapse of the Applicable Statute of Limitations Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations Total Liabilities Assumed Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities Deferred Tax Liabilities: Deferred Tax Liabilities, Gross [Abstract] Number of dry wells Oil and Gas, Development Well Drilled, Net Nonproductive, Number Antidilutive securities excluded from the computation of diluted earnings per share (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Current income tax (benefit) Current Income Tax Expense (Benefit) Finance leases, weighted average remaining lease term Finance Lease, Weighted Average Remaining Lease Term Increase in unrecognized tax benefits resulting from tax position taken on prior year return Increase in Unrecognized Tax Benefits Resulting from Tax Positions Taken During Prior Periods Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions Useful life, customer relationship intangible assets Finite-Lived Intangible Asset, Useful Life Equity Component [Domain] Equity Component [Domain] Derivative Instruments (Note 19) Total Other Non-Current Assets Derivative Asset, Noncurrent Grantee Status [Domain] Grantee Status [Domain] Schedule of Expected Benefit Payments Schedule of Expected Benefit Payments [Table Text Block] Total Property, Plant and Equipment—Net Property, Plant and Equipment, Net Entity Tax Identification Number Entity Tax Identification Number Lessee, Lease, Description [Table] Lessee, Lease, Description [Table] Proved undeveloped resources (energy) Proved Undeveloped Reserves (Energy) Interest Rate Swaps Interest Rate Contract [Member] Stock-Based Compensation Share-based Payment Arrangement [Text Block] Net (Loss) Income Attributable to CNX Resources Shareholders Net (Loss) Income Attributable to CNX Resources Shareholders Net Income (Loss) Attributable to Parent Distributions to CNXM Noncontrolling Interest Holders Payments to Noncontrolling Interests LIBOR London Interbank Offered Rate (LIBOR) [Member] Unamortized premium Debt Instrument, Unamortized Premium Net Change in Future Income Taxes Changes in Future Income Tax Expense Estimates on Future Cash Flows Related to Proved Oil and Gas Reserves Interest Rate Swap on Revolving Credit Facility Interest Rate Swap On Revolving Credit Facility [Member] Interest Rate Swap On Revolving Credit Facility Total Revenue Results of Operations, Revenue from Oil and Gas Producing Activities Current Fiscal Year End Date Current Fiscal Year End Date State Operating Losses Deferred Tax Asset, Valuation Allowance, State Operating Losses [Member] Deferred Tax Asset, Valuation Allowance, State Operating Losses [Member] Operating Expense Operating Expenses [Abstract] Total Finance Lease Liabilities Present Value of Lease Liabilities Finance Lease, Liability Less—Accumulated Depreciation, Depletion and Amortization Finance Lease, Right-of-Use Asset, Accumulated Amortization Charged to expense - deductions SEC Schedule, 12-09, Valuation Allowances and Reserves, Increase (Decrease) Adjustment Current Portion of Long-Term Liabilities: Liabilities, Other than Long-term Debt, Noncurrent [Abstract] Other intangible assets Intangible Assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill Shares Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] Effect of Change in State Valuation Allowance Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, State, Amount Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, State, Amount Net dry development wells drilled Development Wells Drilled, Net Nonproductive1 Development Wells Drilled, Net Nonproductive1 CNXM Senior Notes CNXM Senior Notes [Member] CNXM Senior Notes [Member] Tax impact from option exercises Excess Tax Benefit from Share-based Compensation, Financing Activities Thereafter Finance Lease, Liability, to be Paid, after Year Five Unrealized (Loss) Gain on Commodity Derivative Instruments: Unrealized (Loss) Gain on Commodity Derivative Instruments Unrealized Gain (Loss) on Derivatives and Commodity Contracts Other Receivables Other receivables Other Receivables, Net, Current Supplemental Cash Flow Information [Abstract] Supplemental Cash Flow Information [Abstract] Impairment of Proved and Unproved Properties Property, Plant and Equipment, Impairment [Policy Text 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Customers Revenue from Contract with Customer [Text Block] Average Effects of Commodity Derivative Financial Settlements (per Mcfe) Average effects of financial settlements (per thousand cubic feet) Average effects of financial settlements (per thousand cubic feet) Operating Leases Right-of-Use Asset Obtained in Exchange for Operating Lease Liability Actuarial Loss Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss) Cash, Cash Equivalents, and Restricted Cash Cash and Cash Equivalents, Policy [Policy Text Block] Inventories Inventory, Policy [Policy Text Block] Income Tax (Benefit) Expense Income Tax (Benefit) Expense / Effective Rate Income Tax Expense (Benefit) Price per share (in usd per share) Forward Contract Indexed to Issuer's Equity, Forward Rate Per Share Cash, Cash Equivalents, and Restricted Cash at Beginning of Period Cash, Cash Equivalents, and Restricted Cash at End of Period Total Cash, Cash Equivalents and Restricted Cash Cash, Cash Equivalents, Restricted 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Type [Domain] Effect of Federal and State Rate Reductions Effective Income Tax Rate Reconciliation, Deduction, Qualified Production Activity, Amount Current Liabilities Liability, Defined Benefit Plan, Current Value of proved reserves, percentage to mortgage Percentage to Mortgage, Value of Proved Reserves Percentage to Mortgage, Value of Proved Reserves Total Non-Current Liabilities Total deferred credits and other liabilities Total deferred credits and other liabilities. Transportation, Gathering and Compression Results of Operations, Transportation Costs Fair value of options granted during the year Shares Granted, Value, Share-based Payment Arrangement, after Forfeiture Exercisable at December 31, 2020 (in usd per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price Senior Notes due January 2029 at 6.00% Senior Notes due January 2029 [Member] Senior Notes due January 2029 Property, Plant and Equipment Property, Plant and Equipment Disclosure [Text Block] Fair Value, by Balance Sheet Grouping [Table] Fair Value, by Balance Sheet Grouping [Table] Reportable Subsegments Reportable Subsegments [Member] Oil and Gas, Development Well Drilled [Table] Oil and Gas, Development Well Drilled [Table] Earnings Per Share Earnings Per Share [Text Block] Discount Rate Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate Net Effect of State Income Taxes Effective Income Tax Rate Reconciliation, Tax Settlement, State and Local, Percent Shale Shale [Member] Shale Schedule of Aging of Capitalized Exploratory Well Costs Schedule of Aging of Capitalized Exploratory Well Costs [Table Text Block] Debt Instrument, unamortized premium Debt Instrument, Unamortized Premium, Current Uncertain Tax Positions Effective Income Tax Rate Reconciliation, Nondeductible Expense, Depletion, Amount Current Liabilities: Liabilities, Current [Abstract] Total Costs Results of Operations, Expense from Oil and Gas Producing Activities Statutory U.S. Federal Income Tax Rate Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent Cash proceeds from Asset Exchange Agreement Proceeds from Asset Exchange Agreement Proceeds from Asset Exchange Agreement Entity shares issued per acquiree share (in shares) Business Combination, Consideration Transferred, Equity Interests Issued And Issuable, Entity Shares Issued Per Acquiree Share Business Combination, Consideration Transferred, Equity Interests Issued And Issuable, Entity Shares Issued Per Acquiree Share Recent Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Letters of credit, maximum borrowing capacity Letters Of Credit, Maximum Borrowing Capacity Letters Of Credit, Maximum Borrowing Capacity Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Asset retirement obligations assumed Disposal Group, Including Discontinued Operations, Asset Retirement Obligations Assumed Disposal Group, Including Discontinued Operations, Asset Retirement Obligations Assumed Subsegments [Axis] Subsegments [Axis]