Schedule of changes in noncontrolling interests Non-redeemable and Redeemable Noncontrolling Interest [Table Text Block] Tabular disclosure of non-redeemable and redeemable noncontrolling interest. 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Additional Letters Of Credit Additional Letters Of Credit [Member] Additional Letters Of Credit Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List] Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List] Taxes paid Income Taxes Paid EQUITY Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract] Net income allocated to participating securities Undistributed Earnings (Loss) Allocated to Participating Securities, Basic Debt instrument, repurchased face amount Debt Instrument, Repurchased Face Amount1 Face (par) amount of the original debt instrument that was repurchased during the period. Other Unrecovered Capital Costs Unrecovered Capital Costs Barrels per day (in Bbl) Derivative, Nonmonetary Notional Amount Occidental Occidental [Member] Occidental Gain (loss) from interest-rate risk Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net Preferred stock (20 million shares authorized at $0.01 par value) no shares outstanding at September 30, 2020 and December 31, 2019 Preferred Stock, Value, Issued Interest rate floor Debt Instrument, Variable Rate, Floor Debt Instrument, Variable Rate, Floor Document Quarterly Report Document Quarterly Report Common stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Debt transaction costs Payment for Debt Extinguishment or Debt Prepayment Cost Other comprehensive income: Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract] OTHER LONG-TERM LIABILITIES Other long-term liabilities Other Liabilities, Noncurrent Other Payments for (Proceeds from) Other Investing Activities Contributions deferred till December 2020 Defined Benefit Plan, Plan Assets, Contributions By Employer, Amount Deferred Defined Benefit Plan, Plan Assets, Contributions By Employer, Amount Deferred OTHER INFORMATION OTHER INFORMATION [Text Block] The entire disclosure for Other information. Share-based compensation, net APIC, Share-based Payment Arrangement, Increase for Cost Recognition Debtor-in-possession financing costs Payments For Debtor-In-Possession Financing Costs Payments For Debtor-In-Possession Financing Costs Inventories Total Inventory, Net Oil and natural gas sales Revenue from Contract with Customer, Excluding Assessed Tax Line of credit minimum liquidity over rolling amount Line Of Credit Minimum Liquidity Over Rolling Amount Line Of Credit Minimum Liquidity Over Rolling Amount Entity File Number Entity File Number July 2021 July Production 2021 [Member] July Production 2021 Member Settlement loss Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement Postretirement and Other Benefit Plans Disclosure Defined Benefit Plan Disclosure [Line Items] Statement [Line Items] Statement [Line Items] Alpine JV Alpine JV [Member] Alpine JV [Member] Class of Stock [Domain] Class of Stock [Domain] NET INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS Net Income (Loss) Attributable to Noncontrolling Interest [Abstract] Purchased Long [Member] Debt instrument, term Debt Instrument, Term Proceeds from long-term lines of credit Proceeds from Long-term Lines of Credit One month LIBOR One Month Libor [Member] Represents one month LIBOR. 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Other expenses, net Other Operating Income (Expense), Net Transportation costs Transportation Costs [Member] Transportation Costs Derivative Instruments and Hedging Activities Disclosures [Table] Derivative Instruments and Hedging Activities Disclosures [Table] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Swap Swap [Member] New common stock issued (in shares) Plan Of Reorganization, Common Stock, Shares, New Issues Plan Of Reorganization, Common Stock, Shares, New Issues Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Prepaid expenses Prepaid Expense, Current Asset retirement obligations Asset Retirement Obligation, Current Issuance of common stock Proceeds from Issuance of Common Stock 48 Month Period Derivative Instrument, Period Three [Member] Derivative Instrument, Period Three Prior to 90 Days Debt Instrument, Redemption, Period One [Member] Schedule of calculation of basic and diluted EPS Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Subscription Rights, Excluding Backstop Parties Subscription Rights, Excluding Backstop Parties [Member] Subscription Rights, Excluding Backstop Parties Schedule of asset impairments Details of Impairment of Long-Lived Assets Held and Used by Asset [Table Text Block] LEASES Lessee, Finance Leases [Text Block] Amendment Flag Amendment Flag Other Other Accrued Liabilities, Current Consolidated Total Net Leverage Ratio Debt Instrument Covenant Leverage Ratio Debt Instrument Covenant Leverage Ratio Net cash provided by operating activities Net cash used in operating activities Net Cash Provided by (Used in) Operating Activities Distributions paid to noncontrolling interest holders Payments of Ordinary Dividends, Noncontrolling Interest Line of current borrowing capacity Line of Credit Facility, Current Borrowing Capacity Series B Preferred Stock Series B Preferred Stock [Member] Derivative Instrument [Axis] 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Right-Of-Use Asset, Number Of Drilling Rigs Released Operating Lease, Right-Of-Use Asset, Number Of Drilling Rigs Released Senior Secured Superpriority DIP Credit Agreement Senior Secured Superpriority DIP Credit Agreement [Member] Senior Secured Superpriority DIP Credit Agreement LIBOR Applicable Margin LIBOR Applicable Margin [Member] LIBOR Applicable Margin OTHER ASSETS Other assets Other Assets, Noncurrent JOINT VENTURES Equity Method Investments and Joint Ventures Disclosure [Text Block] NGLs Propane [Member] TOTAL ASSETS Assets Accrued Liabilities Accrued Liabilities [Abstract] Debtor-in-possession financing costs Debtor Reorganization Items, Debtor-in-Possession Facility Financing Costs Add: return from noncontrolling interest holders Noncontrolling Interest In Net Income Loss Of Return Noncontrolling Interest In Net Income Loss Of Return Schedule of accrued liabilities Schedule of Accrued Liabilities [Table Text Block] Puts Put Option [Member] Schedule of supplemental balance sheet information related to operating leases Lease Operating Balance Sheet Presentation And Other Information [Table Text Block] The tabular disclosure of the presentation of the operating lease balance sheet accounts and other information. 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DEFERRED GAIN AND ISSUANCE COSTS, NET Deferred Gain (Loss) and Issuance Costs, Net, Noncurrent Deferred Gain (Loss) and Issuance Costs, Net, Noncurrent Reorganization items, net (debtor-in-possession financing costs) Reorganization Items Net Debtor-In-Possession Financing Costs Reorganization Items Net Debtor-In-Possession Financing Costs Debt Instrument [Axis] Debt Instrument [Axis] Contributions from noncontrolling interest holders, net Contributions from noncontrolling interest holders, net Noncontrolling Interest, Increase from Sale of Parent Equity Interest Additional Paid-in Capital Additional Paid-in Capital [Member] Marketing and trading revenue Marketing and Trading Revenue [Member] Marketing and Trading Revenue Initial investment commitment in joint venture Initial Investment Commitment In Joint Venture Initial Investment Commitment In Joint Venture Disaggregation of revenue Disaggregation of Revenue [Line Items] 2017 Credit Agreement 2017 Credit Agreement [Member] 2017 Credit Agreement Member Changes in operating assets and liabilities, net Increase (Decrease) in Operating Capital Current Ratio Debt Instrument Covenant Current Ratio Debt Instrument Covenant Current Ratio Net Fair Value Presented in the Balance Sheet Derivative Liability Q4 2020 Fourth Quarter Production 2020 [Member] Fourth Quarter Production 2020 [Member] Investments in subsidiaries Investments in and Advances to Affiliates, Amount of Equity Revenue from Contract with Customer [Abstract] Revenue from Contract with Customer [Abstract] Dry hole expenses Results of Operations, Dry Hole Costs Unproved properties Impairment Of Oil And Gas Properties, Unproved Properties Impairment Of Oil And Gas Properties, Unproved Properties Other Other Receivables Schedule of other current assets, net Schedule of Other Current Assets [Table Text Block] Common stock, outstanding shares (in shares) Common Stock, Shares, Outstanding Income Tax Disclosure [Abstract] Income Tax Disclosure [Abstract] Margin increase, percentage Debt Instrument, Margin Increase, Percentage Debt Instrument, Margin Increase, Percentage Revolving Credit Facility Revolving Credit Facility [Member] (LOSS) INCOME BEFORE INCOME TAXES Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Adjustments to reconcile net (loss) income to net cash provided by operating activities: Adjustments, Noncash Items, to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Electricity cost of sales Electricity Cost Of Sales [Member] Electricity Cost Of Sales Subsequent Event Subsequent Event [Member] After Fourth Anniversary Debt Instrument, Period Five [Member] Debt Instrument, Period Five Aggregate letters of credit issued Letters of Credit Outstanding, Amount Common stock, authorized shares (in shares) Common Stock, Shares Authorized Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List] Operating Lease, Liability, 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Operating lease Operating Lease, Liability, Noncurrent Financial covenant, liquidity threshold Debt Instrument, Covenant Terms, Liquidity Threshold Debt Instrument, Covenant Terms, Liquidity Threshold Return from noncontrolling interest holders Return from noncontrolling interest Noncontrolling Interest In Net Income (Loss) Of Return, Redeemable Noncontrolling Interest In Net Income (Loss) Of Return, Redeemable Basis spread on variable rate Debtor-In-Possession Financing, Basis Spread On Variable Interest Rate On Borrowings Outstanding Debtor-In-Possession Financing, Basis Spread On Variable Interest Rate On Borrowings Outstanding Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net Margin increase, additional percentage Debt Instrument, Margin Increase, Additional Increase Each Subsequent Fiscal Quarter Debt Instrument, Margin Increase, Additional Increase Each Subsequent Fiscal Quarter CURRENT ASSETS Assets, Current [Abstract] Partnership contribution Proceeds from Partnership Contribution Debt repurchases Repayments of Subordinated Debt Adjustments: Net​ Income ​Loss ​Available ​To​ Common​ Stockholders ​Basic Adjustments [Abstract] Net​ Income ​Loss ​Available ​To​ Common​ Stockholders ​Basic Adjustments Abstract Cash paid for reorganization items Payments For Reorganization Items Payments For Reorganization Items Ares JV Ares Joint Venture [Member] Represents Ares joint venture (Ares JV). Exploration expense Exploration Expense Commitment fees Debtor-in-Possession Financing, Fee on Unused Borrowings Comprehensive (loss) income attributable to common stock Comprehensive Income (Loss), Net of Tax, Attributable to Parent Preferred stock, par value (in dollars per share) Preferred Stock, Par or Stated Value Per Share Legal, professional and other, net non-cash items included in changes in operating assets and liabilities, net Reorganization Items Net Non-Cash, Legal, Professional And Other, Net Reorganization Items Net Non-Cash, Legal, Professional And Other, Net Debtor-in-possession financing Debtor-in-Possession Financing, Borrowings Outstanding Amortization of deferred gain Amortization Of Deferred Gains And Debt Issuance Cost The amount of amortization of deferred gains and deferred debt issuance costs. Interest-rate Contract Interest Rate Cap [Member] Counterparty Name [Domain] Counterparty Name [Domain] Capital investments Payments to Acquire Property, Plant, and Equipment Entity Tax Identification Number Entity Tax Identification Number DEBT Long-term Debt [Text Block] Adjustments: Net​ Income ​Loss ​Available ​To​ Common​ Stockholders ​Duilted Adjustments Abstract [Abstract] Net​ Income ​Loss ​Available ​To​ Common​ Stockholders ​Diluted Adjustments Abstract Net derivative gain (loss) from commodity contracts Net derivative gain (loss) from commodity contracts Gain (Loss) on Derivative Instruments, Net, Pretax Operating Lease, Liability, Current, Statement of Financial Position [Extensible List] Operating Lease, Liability, Current, Statement of Financial Position [Extensible List] NET (LOSS) INCOME Net (loss) income Net (loss) income Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Schedule of disaggregated revenue Disaggregation of Revenue [Table Text Block] Trading Symbol Trading Symbol Mezzanine Equity - Redeemable Noncontrolling Interests Mezzanine Equity Redeemable Noncontrolling Interest [Member] This element represents mezzanine equity redeemable noncontrolling interest. Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Schedule of inventories Schedule of Inventory, Current [Table Text Block] Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] Legal Entity [Axis] Legal Entity [Axis] Oil Oil and Condensate [Member] Shares cancelled for taxes Payment, Tax Withholding, Share-based Payment Arrangement Alternative Base Rate Alternative Base Rate [Member] Alternative Base Rate Member Q1 2021 First Quarter Production2021 [Member] Represents the entity's production during the first quarter of 2021. Percentage of voting shares received by existing holders Fresh Start Accounting, Voting Percentage Received Fresh Start Accounting, Voting Percentage Received Warrants exercisable (in percent) Plan Of Reorganization, Exercisable Percentage Plan Of Reorganization, Exercisable Percentage Entity [Domain] Entity [Domain] Derivative, allocation percent Derivative, Allocation Percent Derivative, Allocation Percent Deferred Gain (Loss) and Issuance Costs, Net Deferred Gain (Loss) and Issuance Costs, Net Carrying value as of the balance sheet of the deferred gain (loss) and issuance costs, net. Junior DIP Facility Junior Debtor-in-Possession Credit Agreement [Member] Junior Debtor-in-Possession Credit Agreement Acquisitions Purchase of Assets, Net The cash outflows related to purchasing assets other than capital expenditures, including assets acquired as the result of a merger. Outstanding long-term debt Long-term Debt Condensed Balance Sheet Statement [Table] Condensed Balance Sheet Statement [Table] LEASES Lessee, Operating Leases [Text Block] Mezzanine equity Net income (loss) attributable to noncontrolling interests Noncontrolling Interest in Net Income (Loss) Joint Venture Partners, Redeemable Fair Value Disclosures [Abstract] Fair Value Disclosures [Abstract] Common Class C Common Class C [Member] Lease liability Lease, Liability, Current Lease, Liability, Current Service cost Defined Benefit Plan, Service Cost Non-current asset retirement obligation Asset Retirement Obligations, Noncurrent Cash restricted for capital investments and distributions to a joint venture (JV) partner Restricted Cash and Cash Equivalents City Area Code City Area Code Reduction of headcount, number of employees Reorganization Items, Reduction Of Headcount, Number Of Employees Reorganization Items, Reduction Of Headcount, Number Of Employees Costs of sales Cost of Goods and Services Sold Equity Components [Axis] Equity Components [Axis] Title of 12(b) Security Title of 12(b) Security 2016 Credit Agreement Secured First Lien Second Out Credit Agreement [Member] Represents information pertaining to Secured First Lien Second Out Credit Agreement which is entered into by entity in 2016. Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Minimum Minimum [Member] Subscription Right, Backstop Commitment Agreement Subscription Right, Backstop Commitment Agreement [Member] Subscription Right, Backstop Commitment Agreement Balance Sheet Location [Domain] Balance Sheet Location [Domain] Total property, plant and equipment, net Total property, plant and equipment, net Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, after Accumulated Depreciation and Amortization Operating lease Operating Lease, Liability, Current Plan of Reorganization [Abstract] Grace period Debt Instrument, Grace Period Debt Instrument, Grace Period Net income attributable to noncontrolling interests Less: net income attributable to noncontrolling interests Net Income (Loss) Attributable to Noncontrolling Interest Equity Method Investments and Joint Ventures [Abstract] Equity Method Investments and Joint Ventures [Abstract] Recognized actuarial loss Defined Benefit Plan, Amortization of Gain (Loss) Total Defined Benefit Plan, Net Periodic Benefit Cost (Credit) Schedule of derivative instruments in statement of financial position, fair value Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block] REVENUES Revenues [Abstract] CASH FLOW FROM OPERATING ACTIVITIES Net Cash Provided by (Used in) Operating Activities [Abstract] EQUITY Stockholders' Equity Note Disclosure [Text Block] Commodity Contracts Commodity Contract [Member] Parent Company And Subsidiaries In Debtor In Possession Financing Parent Company And Subsidiaries In Debtor In Possession Financing [Member] Parent Company And Subsidiaries In Debtor In Possession Financing Number of wells to be drilled Number Of Wells Agreed For Drilling Number Of Wells Agreed For Drilling Contractual interest not recognized in financial statements Contractual Interest Expense on Prepetition Liabilities Not Recognized in Statement of Operations Percentage of debt hedged by price risk derivatives Percentage Of Debt Hedged By Price Risk Derivatives Percentage Of Debt Hedged By Price Risk Derivatives Additional paid-in capital Additional Paid in Capital, Common Stock Total lease liabilities Total Lease Liability Total Lease Liability Preferred stock, liquidation preference, value Preferred Stock, Liquidation Preference, Value Subsequent Event Type [Domain] Subsequent Event Type [Domain] Business Acquisition [Line Items] Business Acquisition [Line Items] Class of Warrant or Right [Domain] Class of Warrant or Right [Domain] Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Redeemable Noncontrolling Interest, by Legal Entity [Table] Redeemable Noncontrolling Interest, by Legal Entity [Table] Asset impairments Total Asset Impairment Charges Defined Benefit Plan and Other Postretirement Benefit Plan [Domain] Retirement Plan Type [Domain] Condensed Income Statements, Captions [Line Items] Condensed Income Statements, Captions [Line Items] Hedge Production Periods [Domain] Hedge Production Periods [Domain] Identified production period subject to hedge instruments. Schedule of Equity Method Investments [Table] Schedule of Equity Method Investments [Table] Debtor-in-possession financing, amount arranged Debtor-in-Possession Financing, Amount Arranged Accrued liabilities Accrued Liabilities [Member] Trade receivables Accounts Receivable, after Allowance for Credit Loss, Current Finished goods Inventory, Finished Goods, Gross Percentage of common interest held by CRC Noncontrolling Interest, Ownership Percentage by Parent Shared First Priority Lien Shared First Priority Lien [Member] Shared First Priority Lien [Member] Other Information [Table] Other Information [Table] Other Information [Table] Estimated fair value of short-term debt Short-term Debt, Fair Value Debt Instrument, Redemption, Period [Domain] Debt Instrument, Redemption, Period [Domain] Proceeds from common stock issued Plan Of Reorganization, Proceeds From Issuance Of Common Stock, Gross Plan Of Reorganization, Proceeds From Issuance Of Common Stock, Gross Debt Instrument, Period [Axis] Debt Instrument, Period [Axis] Debt Instrument, Period After 90 Days, Before First Anniversary Date Debt Instrument, Redemption, Period Two [Member] Materials and supplies Other Inventory, Supplies, Gross After Second Anniversary Debt Instrument, Period Three [Member] Debt Instrument, Period Three Subscription Rights Subscription Rights [Member] Subscription Rights Cash Cash Other comprehensive income Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Proceeds from common stock issued Plan Of Reorganization, Proceeds From Issuance Of Common Stock, Net Of Issuance Costs Plan Of Reorganization, Proceeds From Issuance Of Common Stock, Net Of Issuance Costs Debt Instrument, Redemption, Period [Axis] Debt Instrument, Redemption, Period [Axis] Repayments of debtor-in-possession facilities Payments For Debtor-In-Possession Financing Payments For Debtor-In-Possession Financing Schedule Of Liabilities Subject To Compromise Schedule Of Liabilities Subject To Compromise [Table Text Block] Schedule Of Liabilities Subject To Compromise Table Text Block Collaborative Arrangement and Arrangement Other than Collaborative [Domain] Collaborative Arrangement and Arrangement Other than Collaborative [Domain] Derivative Instrument, Period [Domain] Derivative Instrument, Period [Domain] Derivative Instrument, Period Lien Notes Lien Notes [Member] Lien Notes Gross Amounts Recognized at Fair Value Derivative Asset, Fair Value, Gross Asset NON-OPERATING (LOSS) INCOME Nonoperating Income (Expense) [Abstract] Contributions from noncontrolling interest holders, net Temporary Equity, Increase From Contributions The amount of increase in temporary equity due to contributions. Debt instrument face amount Debt Instrument, Face Amount Level 2 Fair Value, Inputs, Level 2 [Member] Sold Short [Member] Other current assets, net Other current assets, net Other Assets, Current Equity [Abstract] Equity [Abstract] Net periodic benefit costs: Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract] Interest rate to be in place to receive payment Derivative, Cap Interest Rate 2017 Credit Agreement Secured First Lien Second Out Credit Agreement 2017 [Member] Represents information pertaining to Secured First Lien Second Out Credit Agreement which is entered into by entity in 2017. After December 31, 2021 Debt Instrument, Period One [Member] Debt Instrument, Period One Entity Central Index Key Entity Central Index Key Entity Emerging Growth Company Entity Emerging Growth Company Proceeds from debtor-in-possession facilities Proceed From Debtor-in-Possession Financing Proceed From Debtor-in-Possession Financing ACCOUNTING AND DISCLOSURE CHANGES Accounting Standards Update and Change in Accounting Principle [Text Block] Payments for issuance fee Plan Of Reorganization, Payments For Issuance Costs Plan Of Reorganization, Payments For Issuance Costs Credit Facility [Domain] Credit Facility [Domain] Weighted-average common shares outstanding — diluted (in shares) Weighted Average Number of Shares Outstanding, Diluted Derivative Contract [Domain] Derivative Contract [Domain] Letters of Credit Letter of Credit [Member] Basic (includes return from noncontrolling interest) (in dollars per share) Basic (in dollars per share) Earnings Per Share, Basic Condensed Cash Flow Statement [Table] Condensed Cash Flow Statement [Table] After the Third Anniversary Date, Before Fourth Anniversary Date Debt Instrument, Redemption, Period Five [Member] Debt Disclosure [Abstract] Debt Disclosure [Abstract] Accrued taxes other than on income Accrual for Taxes Other than Income Taxes, Current Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List] Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List] Debt Prior To Bankruptcy Debt Prior To Bankruptcy [Member] Debt Prior To Bankruptcy Total right-of-use assets Leases, Right-Of-Use Asset Leases, Right-Of-Use Asset OGCI OGCI [Member] OGCI [Member] Net cash used in financing activities Net cash provided by financing activities Net Cash Provided by (Used in) Financing Activities Contributions from noncontrolling interest holders, net Proceeds from Noncontrolling Interests Short-term Debt, Type [Axis] Short-term Debt, Type [Axis] Warrant Adjustments to Additional Paid in Capital, Warrant Issued New Accounting Pronouncements and Changes in Accounting Principles [Abstract] Accounting Standards Update and Change in Accounting Principle [Abstract] CHAPTER 11 PROCEEDINGS Reorganization under Chapter 11 of US Bankruptcy Code Disclosure [Text Block] Through Fourth Anniversary Debt Instrument, Period Four [Member] Debt Instrument, Period Four Balance Sheet Location [Axis] Balance Sheet Location [Axis] Electricity sales Electricity sales Sale Of Electricity [Member] This member represents electricity sales. Counterparty Name [Axis] Counterparty Name [Axis] Common stock (200 million shares authorized at $0.01 par value) outstanding shares (September 30, 2020 - 49,498,227 and December 31, 2019 - 49,175,843) Common Stock, Value, Issued Return from noncontrolling interest Noncontrolling Interest In Net Income (Loss) Of Return, Nonredeemable Noncontrolling Interest In Net Income (Loss) Of Return, Nonredeemable Proceeds from debt Proceeds from Issuance of Secured Debt Fair Value of Derivatives Offsetting Assets [Line Items] Proved oil and natural gas properties Impairment Of Oil And Gas Properties, Proved Properties Impairment Of Oil And Gas Properties, Proved Properties Current portion of long-term debt Less: Current portion of long-term debt Long-term Debt, Current Maturities After Fifth Anniversary Debt Instrument, Period Six [Member] Debt Instrument, Period Six Total short-term borrowings and current maturities Debt, Current Position [Axis] Position [Axis] Retirement Benefits [Abstract] Retirement Benefits [Abstract] 5% Senior Notes due 2020 Senior Notes 5.00 Percent Due 2020 [Member] Represents the senior notes payable that bear an interest rate of 5.00 percent and will mature in 2020. Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Tier 2 Warrants Tier 2 Warrants [Member] Tier 2 Warrants Member Equity attributable to noncontrolling interests Stockholders' Equity Attributable to Noncontrolling Interest Inventory Disclosure [Abstract] Inventory Disclosure [Abstract] Short-term borrowings Short-term Debt Unrestricted cash Unrestricted Cash Unrestricted Cash CASH FLOW FROM INVESTING ACTIVITIES Net Cash Provided by (Used in) Investing Activities [Abstract] Schedule of Defined Benefit Plans Disclosures [Table] Schedule of Defined Benefit Plans Disclosures [Table] Shares reserved for future issuance (in shares) Plan Of Reorganization, Common Stock, Capital Shares Reserved For Future Issuance Plan Of Reorganization, Common Stock, Capital Shares Reserved For Future Issuance LONG-TERM DEBT Total long-term debt Long-term Debt, Excluding Current Maturities Gross Amounts Offset in the Balance Sheet Derivative Asset, Fair Value, Gross Liability Debt instrument Debt Debt Instrument [Line Items] Statement of Comprehensive Income [Abstract] Statement of Comprehensive Income [Abstract] Total equity attributable to common stock Stockholders' Equity Attributable to Parent Number of new directors Number Of New Directors Number Of New Directors TOTAL LIABILITIES AND EQUITY Liabilities and Equity Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax INCOME TAXES Income Tax Disclosure [Text Block] Total derivatives Derivative Assets (Liabilities), at Fair Value, Net Tier 1 Warrants Tier 1 Warrants [Member] Tier 1 Warrants Member Portion at Fair Value Measurement Portion at Fair Value Measurement [Member] Accrued employee-related costs Employee-related Liabilities, Current 6% Senior Notes due 2024 Senior Notes 6.00 Percent Due 2024 [Member] Represents the senior notes payable that bear an interest rate of 6.00 percent and will mature in 2024. Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Total costs Total costs Costs and Other Deductions Total costs of sales, operating expenses, and other operating expenses for the period. 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hedging percent Derivative, Terms, Hedging Percent Derivative, Terms, Hedging Percent Outstanding long-term debt Debt carrying value Long-term Debt, Gross Schedule of long-term debt Schedule of Long-term Debt Instruments [Table Text Block] After the Second Anniversary Date, Before Third Anniversary Date Debt Instrument, Redemption, Period Four [Member] Gross Amounts Recognized at Fair Value Derivative Liability, Fair Value, Gross Liability Line of credit facility, maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Net (loss) income Net Income (Loss), Including Portion Attributable to Nonredeemable Noncontrolling Interest Unamortized deferred gain and issuance costs, net Debtor Reorganization Items, Gain (Loss) on Settlement of Other Claims, Net Distributions to noncontrolling interest holders Distributions to noncontrolling interest holders Noncontrolling Interest, Decrease from Distributions to Redeemable Noncontrolling Interest Holders Decrease in redeemable noncontrolling interest balance from payment of dividends or other distributions by the non-wholly owned subsidiary or partially owned entity, included in the consolidation of the parent entity, to the noncontrolling interest holders. Maximum Maximum [Member] Security Exchange Name Security Exchange Name Federal Funds Rate Fed Funds Effective Rate Overnight Index Swap Rate [Member] Preferred stock, authorized shares (in shares) Preferred Stock, Shares Authorized Equity Attributable to Noncontrolling Interests Equity Attributable to Noncontrolling Interest Noncontrolling Interest [Member] Subscription Rights, Backstop Parties Subscription Rights, Backstop Parties [Member] Subscription Rights, Backstop Parties Debt Instrument, Period [Domain] Debt Instrument, Period [Domain] Debt Instrument, Period Accumulated Deficit Retained Earnings [Member] Hedge Production Periods [Axis] Hedge Production Periods [Axis] Information about the production period subject to hedge instruments. 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