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Sold Calls - Crude Oil Q4 2027 [Member] Sold Calls - Crude Oil Q4 2027 Adjustment to Compensation, Amount Adjustment to Compensation Amount Segment Reporting [Abstract] Sold Calls - Crude Oil 2028 Sold Calls - Crude Oil 2028 [Member] Sold Calls - Crude Oil 2028 Common stock (200,000,000 shares authorized at $0.01 par value) (110,945,852 and 110,645,691 shares issued; 88,275,781 and 88,754,165 shares outstanding at September 30, 2026 and December 31, 2025) Common Stock, Value, Issued Shares cancelled for taxes Payment, Tax Withholding, Share-Based Payment Arrangement Compensation-related liabilities Employee-related Liabilities, Current Schedule of Long-term Debt Schedule of Long-Term Debt Instruments [Table Text Block] Other Other Assets, Miscellaneous, Noncurrent PENSION AND POSTRETIREMENT BENEFIT PLANS Retirement Benefits [Text Block] Transaction and integration costs Business Combination, Integration-Related Cost, Expense Purchased Puts - Crude Oil Q4 2027 Purchased Puts - Crude Oil 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Expiration Date Gross Amounts at Fair Value Derivative Liability, Gross Liability Including Not Subject to Master Netting Arrangement Corporate/Eliminations/Other Corporate and Other Corporate And Eliminations [Member] Corporate And Eliminations Schedule of Disaggregated Revenue Disaggregation of Revenue [Table Text Block] Adjustments, Other long-term liabilities Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Other Liability, Noncurrent Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Other Liability, Noncurrent Non-Rule 10b5-1 Arrangement Adopted Non-Rule 10b5-1 Arrangement Adopted [Flag] 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] Disposal Group, Including Discontinued Operations [Line Items] Disposal Group, Including Discontinued Operations [Line 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Sold Calls - Crude Oil Q1 2027 Sold Calls - Crude Oil Q1 2027 [Member] Sold Calls - Crude Oil Q1 2027 Related Party Related Party [Member] Products and Services [Domain] Product and Service [Domain] Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Net (gain) loss from natural gas purchase derivatives Net (gain) loss from natural gas purchase derivatives Net gain on natural gas purchase derivatives Derivative, Gain (Loss) On Natural Gas Purchase Derivatives Derivative, Gain (Loss) On Natural Gas Purchase Derivatives Purchased Puts - Crude Oil Q4 2026 Purchased Puts - Crude Oil Q4 2026 [Member] Purchased Puts - Crude Oil Q4 2026 Entity Interactive Data Current Entity Interactive Data Current Materials and supplies Other Inventory, Supplies, Gross Variable Rate [Axis] Variable Rate [Axis] Management Services Agreement Management Services Agreement [Member] Management Services Agreement Deferred tax liabilities Deferred tax liability Deferred Income Tax Liabilities, Net Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Entity Small Business Entity Small Business Comprehensive (loss) income Comprehensive Income (Loss), Net of Tax, Attributable to Parent Termination Date Trading Arrangement Termination Date Aera Energy, LLC Aera Energy, LLC [Member] Aera Energy, LLC Decrease in inventories Adjustments, Inventories Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Inventory Subsequent Events [Abstract] Subsequent Events [Abstract] ASSETS HELD FOR SALE Disposal Groups, Including Discontinued Operations, Disclosure [Text Block] Compensation Actually Paid vs. Total Shareholder Return Compensation Actually Paid vs. Total Shareholder Return [Text Block] MNPI Disclosure Timed for Compensation Value MNPI Disclosure Timed for Compensation Value [Flag] Number of offshore platforms with decommissioning obligations defaulted Number Of Offshore Platforms With Decommissioning 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Liabilities Business Combination, Recognized Liability Assumed, Accrued Liabilities Increase in asset retirement obligations Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Asset Retirement Obligations Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Asset Retirement Obligations Income taxes paid Income Tax Paid, before Refund Received Other segment expenses Segment Reporting, Other Segment Item, Amount Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] Entity Tax Identification Number Entity Tax Identification Number Derivative Instruments and Hedging Activities Disclosures [Table] Derivative Instruments and Hedging Activities Disclosures [Table] Fixed rate debt Long-Term Debt, Percentage Bearing Fixed Interest, Amount Legal Entity [Axis] Legal Entity [Axis] Assets Acquired Assets Acquired Business Combination, Recognized Asset Acquired, Asset [Abstract] Signal Hill 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Award Type Award Type [Axis] Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Trade receivables Accounts Receivable, after Allowance for Credit Loss, Current Schedule of Shares Repurchased Class of Treasury Stock [Table Text Block] Fair value of derivative contracts Business Combination, Recognized Asset Acquired, Fair Value Of Derivative Contracts Business Combination, Recognized Asset Acquired, Fair Value Of Derivative Contracts Retained earnings Retained Earnings (Accumulated Deficit) Commodity Contracts Commodity Contract [Member] Product and Service [Axis] Product and Service [Axis] 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] Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Pension Benefit Pension Plan [Member] Common Stock Common stock Common Stock [Member] Dividend equivalents for stock-based compensation awards Dividends Equivalents For Stock-Based Compensation Awards Dividends Equivalents For Stock-Based Compensation Awards Litigation and settlement related expenses Litigation Settlement, Fee Expense Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] BASIS OF PRESENTATION Organization, Consolidation and Presentation of Financial Statements Disclosure and Significant Accounting Policies [Text Block] Cover [Abstract] Cover [Abstract] Condensed Financial Statements [Table] Condensed Financial Statements [Table] Offshore platforms maintenance and abandonment costs Cost Of Property Repairs And Maintenance and Project Abandonment Costs Cost Of Property Repairs And Maintenance and Project Abandonment Costs Derivative Contract [Domain] Derivative Contract [Domain] Adjustments, Accrued liabilities Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Accrued Liabilities Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Accrued Liabilities Equity Awards Adjustments Equity Awards Adjustments [Member] TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY Liabilities and Equity Fair value of derivative contracts Fair value of derivative contracts Derivative Liability, Noncurrent Employee Stock Option Share-Based Payment Arrangement, Option [Member] SoCal Border - Natural Gas Q4 2027 SoCal Border - Natural Gas Q4 2027 [Member] SoCal Border - Natural Gas Q4 2027 Asset retirement obligations - current portion Asset Retirement Obligation, Current Segments [Axis] Segments [Axis] Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Proceeds from Senior Notes, net Proceeds from Issuance of Senior Long-Term Debt SoCal Border - Natural Gas Q4 2026 SoCal Border - Natural Gas Q4 2026 [Member] SoCal Border - Natural Gas Q4 2026 Related Party, Type [Domain] Related and Nonrelated Parties [Domain] Adjustments, Fair value of derivative contracts Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Fair Value Of Derivative Contracts Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Fair Value Of Derivative Contracts Tabular List, Table Tabular List [Table Text Block] Amortization of prior service cost credit included in net periodic benefit cost, net of tax Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), Reclassification Adjustment from AOCI, after Tax Number of oil and gas wells abandoned Number Of Oil And Gas Wells Abandoned Number Of Oil And Gas Wells Abandoned Other non-operating income, net Other non-operating income, net Other Nonoperating Income (Expense) DEBT Long-Term Debt [Text Block] Income tax receivable Income Taxes Receivable, Current Other operating expenses, net Other operating expenses, net Other operating expenses, net Other Operating Income (Expense), Net Name Awards Close in Time to MNPI Disclosures, Individual Name STOCKHOLDERS' 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] Preferred stock, authorized (in shares) Preferred Stock, Shares Authorized OTHER INFORMATION SUPPLEMENTAL INFORMATION [Abstract] Supplemental Information Operating costs Oil and Gas, Production Cost, Period Cost Preferred stock (20,000,000 shares authorized at $0.01 par value) no shares outstanding at September 30, 2026 and December 31, 2025 Preferred Stock, Value, Issued Adjustment to Compensation: Adjustment to Compensation [Axis] Tax withholding from share repurchase Share Repurchase Program, Tax Withholding Obligation Share Repurchase Program, Tax Withholding Obligation Hedging Designation [Domain] Hedging Designation [Domain] Class of Stock [Domain] Class of Stock [Domain] Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Interest paid, net of amounts capitalized Interest Paid, Excluding Capitalized Interest, Operating Activity Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Hedging Designation [Axis] Hedging Designation [Axis] Credit Facility [Axis] Credit Facility [Axis] Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Exploration expense Exploration Expense ABR Applicable Margin ABR Applicable Margin [Member] ABR Applicable Margin Natural gas Natural Gas, Production [Member] Discontinued Operations and Disposal Groups [Abstract] Name Measure Name INCOME TAXES Income Tax Disclosure [Text Block] Accounts payable Payable to affiliate Accounts Payable, Current Pay vs Performance Disclosure [Line Items] Other non-cash charges to income, net Other Noncash Income (Expense) Debt instrument Debt Instrument [Line Items] Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Settlements Gain (Loss) on Sale of Derivatives Total consideration Business Combination, Consideration Transferred Retirement Plan Type [Domain] Retirement Plan Type [Domain] Additional Paid-in Capital Additional Paid-in Capital [Member] Entity Filer Category Entity Filer Category Supplemental Cash Flow Elements [Abstract] Supplemental Cash Flow Elements [Abstract] Sold Calls - Crude Oil Q4 2026 Sold Calls - Crude Oil Q4 2026 [Member] Sold Calls - Crude Oil Q4 2026 Increase in accounts payable Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Accounts Payable Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Accounts Payable Other revenue Revenue Not from Contract with Customer Name Trading Arrangement, Individual Name Cash and cash equivalents Cash and Cash Equivalent California Geologic Energy Management Division California Geologic Energy Management Division [Member] California Geologic Energy Management Division Net (loss) gain from commodity sales derivatives Net (loss) gain from commodity sales derivatives Gain (Loss) on Derivative Instruments, Net, Pretax Company Selected Measure Amount Company Selected Measure Amount Schedule of Reconciliation of Operating Profit (Loss) from Segments to Consolidated Segment Reporting, Reconciliation of Profit (Loss) by Segment to Consolidated [Table Text Block] Not Designated as Hedging Instrument Not Designated as Hedging Instrument [Member] 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 SOFR Secured Overnight Financing Rate (SOFR) [Member] Entity Address, Address Line Two Entity Address, Address Line Two Midway Sunset Cogeneration Company Midway Sunset Cogeneration Company [Member] Midway Sunset Cogeneration Company SUPPLEMENTAL ACCOUNT BALANCES Supplemental Information [Text Block] Supplemental Information Common stock per share fair value (in dollars per share) Business Combination, Price Per Share CURRENT ASSETS Assets, Current [Abstract] Net Fair Value Derivative Liability SoCal Border - Natural Gas 2028 SoCal Border - Natural Gas 2028 [Member] SoCal Border - Natural Gas 2028 Total operating revenue Business Combination, Pro Forma Information, Pro Forma Revenue Non-PEO NEO Non-PEO NEO [Member] Senior Notes (Unsecured) Senior Notes [Member] Entity Address, Address Line One Entity Address, Address Line One Income tax benefit (provision) Income tax (benefit) provision Income Tax Expense (Benefit) Potential common shares, if dilutive: Dilutive Securities, Effect on Basic Earnings Per Share [Abstract] Adjustments to reconcile net (loss) income to net cash provided by operating activities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Noncash Item [Abstract] Costs of sales Cost of Product and Service Sold Award Timing Method Award Timing Method [Text Block] Consolidation Consolidation, Policy [Policy Text Block] (Decrease) increase in cash and cash equivalents Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation Other revenue Product and Service, Other [Member] Offsetting Derivative Liabilities Offsetting Derivative Liabilities [Abstract] Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Accretion expense Accretion Expense EPS Earnings Per Shares Basic and Diluted [Abstract] Earnings Per Shares Basic and Diluted Amortization of net actuarial loss Defined Benefit Plan, Amortization of Gain (Loss) NET (LOSS) INCOME Net (loss) income Net (loss) income Net Income (Loss) Attributable to Parent Swaps - Crude Oil Q4 2026 Swaps - Crude Oil Q4 2026 [Member] Swaps - Crude Oil Q4 2026 Long-term Debt, Type [Axis] Long-Term Debt, Type [Axis] Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Net amounts due from joint interest partners Accounts Receivable, After Allowance For Credit Loss, Due From Joint Venture, Current Accounts Receivable, After Allowance For Credit Loss, Due From Joint Venture, Current Balance Sheet Location [Axis] Location, Statement of Financial Position, Balance [Axis] Statement [Table] Statement [Table] Restatement Determination Date: Restatement Determination Date [Axis] Unamortized premium Debt Instrument, Unamortized Premium Adjustment to the preliminary purchase price allocation Equity Method Investment, Preliminary Purchase Price Allocation, Measurement Period Adjustment Equity Method Investment, Preliminary Purchase Price Allocation, Measurement Period Adjustment Liabilities Assumed Liabilities Assumed Business Combination, Recognized Liability Assumed, Liability [Abstract] Derivatives Derivative Instruments and Hedging Activities Disclosures [Line Items] Electricity generation expenses Electricity Generation Expenses [Member] Electricity Generation Expenses Released funds exceeding percentage Business Combination, Restricted Cash, Cumulative Abandonment And Habitat Restoration Expenditures, Percentage Business Combination, Restricted Cash, Cumulative Abandonment And Habitat Restoration Expenditures, Percentage Increase in property, plant and equipment, net Adjustments, Property, plant and equipment Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Property, Plant, and Equipment Adjustments, Cash Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Cash And Cash Equivalents Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Measurement Period Adjustments, Cash Adjustments, Asset retirement obligations Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Noncurrent Liabilities, Asset Retirement Obligations Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Noncurrent Liabilities, Asset Retirement Obligations REVENUES Revenues [Abstract] Pending receivable Loss Contingency, Damages Sought, Value Weighted-average price per barrel (in dollars per barrel) Underlying, Derivative Volume Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block] Derivative Instruments and Hedging Activities Disclosure [Abstract] Derivative Instruments and Hedging Activities Disclosure [Abstract]