Debt Disclosure [Abstract] Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Debt Instrument [Axis] Debt Instrument [Axis] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] 2014 Revolving Credit Facility (Shared First Priority Lien) Secured Debt [Member] 2017 Credit Agreement (Shared First Priority Lien) Secured First Lien Second Out Credit Agreement2017 [Member] Represents information pertaining to Secured First Lien Second Out Credit Agreement which is entered into by entity in 2017. 2016 Credit Agreement (Shared First Priority Lien) 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. Second Lien Notes (Second Priority Lien) Senior Lien [Member] Senior Notes (Unsecured) Senior Notes [Member] Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] 5% Notes Due 2020 Senior Notes500 Percent Due2020 [Member] Represents the senior notes payable that bear an interest rate of 5.00 percent and will mature in 2020. 5.5% Notes Due 2021 Senior Notes550 Percent Due2021 [Member] Represents the senior notes payable that bear an interest rate of 5.50 percent and will mature in 2021. 6% Senior Notes due 2024 Senior Notes600 Percent Due2024 [Member] Represents the senior notes payable that bear an interest rate of 6.00 percent and will mature in 2024. Variable Rate [Axis] Variable Rate [Axis] Variable Rate [Domain] Variable Rate [Domain] Applicable margin on LIBOR loans London Interbank Offered Rate (LIBOR) [Member] Applicable margin on Alternate Base Rate loans Debt Instrument, Adjustable Base Rate [Member] Represents alternate base rate Statistical Measurement [Axis] Statistical Measurement [Axis] Statistical Measurement [Domain] Statistical Measurement [Domain] Minimum Minimum [Member] Maximum Maximum [Member] Debt instrument Debt Instrument [Line Items] Debt Long-term Debt, Unclassified [Abstract] Total Debt Long-term Debt, Gross Less: Current Maturities Debt Instrument Carrying Amount Current Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt, classified as current. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt. Long-Term Debt Debt Instrument Carrying Amount Noncurrent Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt, classified as noncurrent. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt. Debt instrument, interest rate, stated percentage Debt Instrument, Interest Rate, Stated Percentage Interest rate added to variable rate basis (as a percent) Debt Instrument, Basis Spread on Variable Rate Outstanding amount of 2016 Credit Agreement notes that triggers accelerated payment Debt Instrument Covenant, Outstanding Amount, Maturity Trigger The outstanding amount of certain notes that triggers the acceleration of the maturity of debt instrument under a credit agreement. Period before maturity of the 2016 Credit Agreement notes that triggers accelerated payment Period Before Maturity of Second Debt, Maturity of First Debt that Triggers Accelerated Payment Period before maturity of the second debt that triggers accelerated payment when the first debt matures, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Includes, but not limited to, weeks in a year or quarter. Principal amount due by June 2021 Long Term Debt Maturities Repayments Of Principal In June 2021 Amount of long-term debt payable in June 2021. Principal amount due by December 2021 Long Term Debt Maturities Repayments Of Principal In December 2021 Amount of long-term debt payable in December 2021. Principal amount due by June 2022 Long Term Debt Maturities Repayments Of Principal In June 2022 Amount of long-term debt payable in June 2022. Principal amount due by December 2022 Long Term Debt Maturities Repayments Of Principal In December 2022 Amount of long term debt payable in December 2022. Statement of Financial Position [Abstract] CURRENT ASSETS Assets, Current [Abstract] Cash Cash Trade receivables Accounts Receivable, after Allowance for Credit Loss, Current Inventories Inventory, Net Other current assets, net Other Assets, Current Total current assets Assets, Current PROPERTY, PLANT AND EQUIPMENT Property, Plant and Equipment, Gross Accumulated depreciation, depletion and amortization Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Total property, plant and equipment, net Property, Plant and Equipment, Net OTHER ASSETS Other Assets, Noncurrent TOTAL ASSETS Assets CURRENT LIABILITIES Liabilities, Current [Abstract] Current maturities of long-term debt Accounts payable Accounts Payable, Current Accrued liabilities Accrued Liabilities, Current Total current liabilities Liabilities, Current LONG-TERM DEBT DEFERRED GAIN 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. OTHER LONG-TERM LIABILITIES Other Liabilities, Noncurrent MEZZANINE EQUITY Redeemable Noncontrolling Interest, Equity, Carrying Amount [Abstract] Redeemable noncontrolling interests Redeemable Noncontrolling Interest, Equity, Carrying Amount EQUITY Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract] Preferred stock (20 million shares authorized at $0.01 par value) no shares outstanding at June 30, 2019 and December 31, 2018 Preferred Stock, Value, Issued Common stock (200 million shares authorized at $0.01 par value) outstanding shares (June 30, 2019 - 49,004,413 and December 31, 2018 - 48,650,420) Common Stock, Value, Issued Additional paid-in capital Additional Paid in Capital, Common Stock Accumulated deficit Retained Earnings (Accumulated Deficit) Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax Total equity attributable to common stock Stockholders' Equity Attributable to Parent Equity attributable to noncontrolling interests Stockholders' Equity Attributable to Noncontrolling Interest Total equity Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest TOTAL LIABILITIES AND EQUITY Liabilities and Equity Leases [Abstract] Operating lease, net Operating Lease, Right-of-Use Asset Finance lease, net Finance Lease, Right-of-Use Asset Total lease assets Leases, Right-of-Use Asset Leases, Right-of-Use Asset Operating lease Operating Lease, Liability, Current Finance lease Finance Lease, Liability, Current Operating lease Operating Lease, Liability, Noncurrent Finance lease Finance Lease, Liability, Noncurrent Total lease liabilities Total Lease Liability Total Lease Liability Revenue from Contract with Customer [Abstract] REVENUE RECOGNITION Revenue from Contract with Customer [Text Block] Retirement Benefits [Abstract] PENSION AND POSTRETIREMENT BENEFIT PLANS Pension and Other Postretirement Benefits Disclosure [Text Block] Debt Repurchases of debt Debt instrument, repurchased face amount Debt Instrument, Repurchased Face Amount1 Face (par) amount of the original debt instrument that was repurchased during the period. Repurchase value of the principal amounts Early Repayment of Senior Debt Pre-tax gain on extinguishment of debt, net of a reduction in deferred issuance costs Gain (Loss) on Extinguishment of Debt Condensed Financial Information Disclosure [Abstract] Condensed Income Statement [Table] Condensed Income Statement [Table] Consolidated Entities [Axis] Consolidated Entities [Axis] Consolidated Entities [Domain] Consolidated Entities [Domain] Parent Parent [Member] Combined Guarantor Subsidiaries Guarantor Subsidiaries [Member] Combined Non-Guarantor Subsidiaries Non-Guarantor Subsidiaries [Member] Consolidation Items [Axis] Consolidation Items [Axis] Consolidation Items [Domain] Consolidation Items [Domain] Reportable Legal Entities Reportable Legal Entities [Member] Eliminations Intersegment Eliminations [Member] Condensed Income Statements, Captions [Line Items] Condensed Income Statements, Captions [Line Items] Total revenues and other Revenues Total costs and other Costs and Other Deductions Total costs of sales, operating expenses, and other operating expenses for the period. Non-operating (loss) income Nonoperating Income (Expense) INCOME (LOSS) BEFORE INCOME TAXES Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Net income attributable to noncontrolling interests Net Income (Loss) Attributable to Noncontrolling Interest NET INCOME (LOSS) ATTRIBUTABLE TO COMMON STOCK Net Income (Loss) Attributable to Parent Subsequent Events [Abstract] Subsequent Event [Table] Subsequent Event [Table] Legal Entity [Axis] Legal Entity [Axis] Entity [Domain] Entity [Domain] Colony Capital, Inc. Colony Capital, Inc. [Member] Colony Capital, Inc. [Member] Subsequent Event Type [Axis] Subsequent Event Type [Axis] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Subsequent Event Subsequent Event [Member] Subsequent Event [Line Items] Subsequent Event [Line Items] Class of Warrant or Right, Exercise Period of Warrant or Right Class of Warrant or Right, Exercise Period of Each Tranche Class of Warrant or Right, Exercise Period of Each Tranche Initial investment commitment in joint venture Initial Investment Commitment In Joint Venture Initial Investment Commitment In Joint Venture Contributions from noncontrolling interest holders, net Potential Increase In Investment Commitment In Joint Venture Potential Increase In Investment Commitment In Joint Venture Joint venture, investment period Joint Venture, Investment Period Joint Venture, Investment Period Quantity of wells to be drilled (in wells) Number Of Wells Agreed For Drilling Number Of Wells Agreed For Drilling Joint venture investment funding percentage Joint Venture Investment Funding Percentage Joint Venture Investment Funding Percentage Joint venture working interest acquired Joint Venture Working Interest Acquired JointVentureWorkingInterestAcquired Joint venture working interest before counterparty return Joint Venture Working Interest Retained In Properties Joint Venture Working Interest Retained In Properties Joint venture working interest after counterparty return Joint Venture Working Interest After Counterparty Return Joint Venture Working Interest After Counterparty Return Warrant outstanding (in shares) Class of Warrant or Right, Outstanding Investment warrants, exercise price (in dollars per share) Investment Warrants, Exercise Price Income Statement [Abstract] REVENUES AND OTHER Revenues [Abstract] Oil and gas sales Revenue from Contract with Customer, Excluding Assessed Tax Net derivative gain (loss) from commodity contracts Gain (Loss) on Derivative Instruments, Net, Pretax Other revenue Other Operating Income Total revenues and other COSTS AND OTHER Costs and Other Deductions [Abstract] No definition available Production costs Production Costs, Period Cost General and administrative expenses Selling, General and Administrative Expense Depreciation, depletion and amortization Depreciation, Depletion and Amortization Taxes other than on income Taxes, Miscellaneous Exploration expense Exploration Expense Other expenses, net Other Operating Income (Expense), Net Total costs and other OPERATING INCOME Operating Income (Loss) NON-OPERATING (LOSS) INCOME Nonoperating Income (Expense) [Abstract] Interest and debt expense, net Interest and Debt Expense Net gain on early extinguishment of debt Gain (Loss) on Repurchase of Debt Instrument Gain on asset divestitures Gain (Loss) on Disposition of Assets Other non-operating expenses Other Nonoperating Expense Income tax Income Tax Expense (Benefit) NET INCOME (LOSS) Net Income (Loss), Including Portion Attributable to Noncontrolling Interest NET (INCOME) LOSS ATTRIBUTABLE TO NONCONTROLLING INTERESTS Net Income (Loss) Attributable to Noncontrolling Interest [Abstract] Mezzanine equity Noncontrolling Interest in Net Income (Loss) Joint Venture Partners, Redeemable Equity Noncontrolling Interest in Net Income (Loss) Joint Venture Partners, Nonredeemable Net income attributable to noncontrolling interests Net income (loss) attributable to common stock per share Earnings Per Share [Abstract] Basic (in dollars per share) Earnings Per Share, Basic Diluted (in dollars per share) Earnings Per Share, Diluted Typical term of payment following invoicing Term of Payment after Invoicing for Contracts with Customers Term of payment following invoicing for contracts with customers, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. LEASES Lessee, Finance Leases [Text Block] LEASES Lessee, Operating Leases [Text Block] Operating cash flows Operating Lease, Payments Investing cash flows Operating Lease, Payments, Use ROU asset obtained in exchange for lease obligations (in millions) Right-of-Use Asset Obtained in Exchange for Operating Lease Liability Weighted-average remaining lease term (in years) Operating Lease, Weighted Average Remaining Lease Term Weighted-average discount rate Operating Lease, Weighted Average Discount Rate, Percent ROU asset obtained in exchange for lease obligations (in millions) Right-of-Use Asset Obtained in Exchange for Finance Lease Liability Weighted-average remaining lease term (in years) Finance Lease, Weighted Average Remaining Lease Term Weighted-average discount rate Finance Lease, Weighted Average Discount Rate, Percent Derivative Instruments and Hedging Activities Disclosure [Abstract] Offsetting Assets [Table] Offsetting Assets [Table] Derivative Instrument [Axis] Derivative Instrument [Axis] Derivative Contract [Domain] Derivative Contract [Domain] Commodity Contracts Commodity Contract [Member] Balance Sheet Location [Axis] Balance Sheet Location [Axis] Balance Sheet Location [Domain] Balance Sheet Location [Domain] Other current assets Other Current Assets [Member] Other assets Other Assets [Member] Accrued liabilities Accrued Liabilities [Member] Other long-term liabilities Other Noncurrent Liabilities [Member] Fair Value of Derivatives Offsetting Assets [Line Items] Gross Amounts Recognized at Fair Value Derivative Asset, Fair Value, Gross Asset Gross Amounts Offset in the Balance Sheet Derivative Asset, Fair Value, Gross Liability Net Fair Value Presented in the Balance Sheet Derivative Asset Gross Amounts Recognized at Fair Value Derivative Liability, Fair Value, Gross Liability Gross Amounts Offset in the Balance Sheet Derivative Liability, Fair Value, Gross Asset Net Fair Value Presented in the Balance Sheet Derivative Liability Total derivatives Derivative Assets (Liabilities), at Fair Value, Net Letters of Credit Letter of Credit [Member] Credit Facility [Axis] Credit Facility [Axis] Credit Facility [Domain] Credit Facility [Domain] 2014 Revolving Credit Facility Revolving Credit Facility [Member] Available borrowing capacity before a month-end minimum liquidity requirement Line of Credit Facility, Current Borrowing Capacity Line of credit facility, maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Financial covenant minimum month end liquidity Debt Instrument Covenant Minimum Monthly Liquidity Amount of minimum monthly liquidity required to maintain, per debt covenant agreement. Borrowing base Debt Borrowing Base The amount of money that maybe borrowed based on the value of the collateral the entity pledges. Maximum sub-limit on borrowing capacity for issuance of letters of credit Line Of Credit Facility Maximum Borrowing Capacity Letters Of Credit Sublimit Maximum borrowing capacity of letters of credit as sub-limit of the main credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. Aggregate letters of credit issued Letters of Credit Outstanding, Amount Schedule of operating lease costs, including amounts capitalized to property, plant and equipment Lease, Cost [Table Text Block] Schedule of other operating and finance lease information Lessee, Operating and Finance Leases, Other Information [Table Text Block] Lessee, Operating and Finance Leases, Other Information [Table Text Block] 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. Schedule of maturities of our operating lease liabilities Lessee, Operating Lease, Liability, Maturity [Table Text Block] Schedule of maturities of our financing lease liabilities Finance Lease, Liability, Maturity [Table Text Block] Schedule of future minimum lease payments for noncancelable operating leases Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block] Commitments and Contingencies Disclosure [Abstract] LAWSUITS, CLAIMS, COMMITMENTS AND CONTINGENCIES Commitments and Contingencies Disclosure [Text Block] Net deferred gain and issuance costs Deferred gains Debt Instrument Unamortized Premium On Exchange Of Debt The amount of debt premium that was originally recognized on exchange of the instrument that has yet to be amortized. Deferred issuance costs and original issue discounts Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Product and Service [Axis] Product and Service [Axis] Products and Services [Domain] Product and Service [Domain] Oil Oil and Condensate [Member] NGLs Propane [Member] Natural gas Natural Gas, Production [Member] Electricity Sale Of Electricity [Member] This member represents electricity sales. Marketing, trading and other Trading Income From Marketing [Member] This member represents marketing trading income. Interest income Interest [Member] It represents Interest income. Disaggregation of revenue Disaggregation of Revenue [Line Items] Other revenue Revenue Not from Contract with Customer, Other Interest income Interest Income, Other Equity Method Investments and Joint Ventures [Abstract] JOINT VENTURES Equity Method Investments and Joint Ventures Disclosure [Text Block] Statement of Cash Flows [Abstract] CASH FLOW FROM OPERATING ACTIVITIES Net Cash Provided by (Used in) Operating Activities [Abstract] Net loss Adjustments to reconcile net loss to net cash provided by operating activities: Adjustments, Noncash Items, to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Net derivative loss from commodity contracts Derivative, Gain (Loss) on Derivative, Net Net proceeds (payments) on settled commodity derivatives Proceeds (Payments) on Derivative Settlements to Reconcile Net Income Loss to Cash provided by Used in Operating Activities The net proceeds (payments) on derivative settlements, which increase (reduce) net income and are thus added (deducted) when calculating cash provided by or used in operating activities. Net gain on early extinguishment of debt Amortization of deferred gain Amortization Of Deferred Gains And Debt Issuance Cost The amount of amortization of deferred gains and deferred debt issuance costs. Gain on asset divestiture Dry hole expenses Results of Operations, Dry Hole Costs Other non-cash charges to income, net Other Noncash Income (Expense) Changes in operating assets and liabilities, net Increase (Decrease) in Operating Capital Net cash provided by operating activities Net Cash Provided by (Used in) Operating Activities CASH FLOW FROM INVESTING ACTIVITIES Net Cash Provided by (Used in) Investing Activities [Abstract] Capital investments Payments to Acquire Property, Plant, and Equipment Changes in capital investment accruals Increase Decrease In Capital Investment Accrual Represents the information pertaining to changes in capital investment accruals Asset divestitures Proceeds from Sale of Productive Assets 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. Other Payments for (Proceeds from) Other Investing Activities Net cash used in investing activities Net Cash Provided by (Used in) Investing Activities CASH FLOW FROM FINANCING ACTIVITIES Net Cash Provided by (Used in) Financing Activities [Abstract] Proceeds from 2014 Revolving Credit Facility Proceeds from Lines of Credit Repayments of 2014 Revolving Credit Facility Repayments of Lines of Credit Debt repurchases Repayments of Subordinated Debt Contributions from noncontrolling interest holders, net Proceeds from Noncontrolling Interests Distributions paid to noncontrolling interest holders Payments of Ordinary Dividends, Noncontrolling Interest Issuance of common stock Proceeds from Issuance of Common Stock Shares canceled for taxes Payment, Tax Withholding, Share-based Payment Arrangement Net cash (used) provided by financing activities Net Cash Provided by (Used in) Financing Activities Increase in cash Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Cash—beginning of period Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Cash—end of period EARNINGS PER SHARE Earnings Per Share [Text Block] Operating lease costs Lease, Cost [Abstract] Operating lease cost Operating Lease, Cost Short-term lease cost Short-term Lease, Cost Variable lease cost Variable Lease, Cost Total operating lease costs Lease, Cost THE SPIN-OFF AND BASIS OF PRESENTATION No definition available. THE SPIN-OFF AND BASIS OF PRESENTATION Spin Off and Basis of Presentation [Text Block] The entire disclosure for the spin-off and basis of presentation. Basis of presentation describes the underlying basis used to prepare the financial statements (for example, US Generally Accepted Accounting Principles, Other Comprehensive Basis of Accounting, IFRS). Income Tax Disclosure [Abstract] INCOME TAXES Income Tax Disclosure [Text Block] Preferred stock, authorized shares (in shares) Preferred Stock, Shares Authorized Preferred stock, par value (in dollars per share) Preferred Stock, Par or Stated Value Per Share Preferred stock, outstanding shares (in shares) Preferred Stock, Shares Outstanding Common stock, authorized shares (in shares) Common Stock, Shares Authorized Common stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Common stock, outstanding shares (in shares) Common Stock, Shares, Outstanding ASSET DIVESTITURE n/a ASSET DIVESTITURE ASSET DIVESTITURE [Text Block] The entire disclosure for asset divestiture. DEBT Long-term Debt [Text Block] Calculation of basic and diluted EPS Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Derivative Instruments and Hedging Activities Disclosures [Table] Derivative Instruments and Hedging Activities Disclosures [Table] Puts Put Option [Member] Swap Swap [Member] Position [Axis] Position [Axis] Position [Domain] Position [Domain] Purchased Long [Member] Sold Short [Member] Hedge Production Periods [Axis] Hedge Production Periods [Axis] Information about the production period subject to hedge instruments. Hedge Production Periods [Domain] Hedge Production Periods [Domain] Identified production period subject to hedge instruments. Q3 2019 Third Quarter Production2019 [Member] Represents the entity's production during the third quarter of 2019. Q4 2019 Fourth Quarter Production2019 [Member] Represents the entity's production during the fourth quarter of 2019. Q1 2020 First Quarter Production2020 [Member] Represents the entity's production during the first quarter of 2020. Q2 2020 Second Quarter Production2020 [Member] Second Quarter Production2020 [Member] Derivatives Derivative Instruments and Hedging Activities Disclosures [Line Items] Daily Volume (in Bbl) Derivative, Nonmonetary Notional Amount Weighted-average price (in dollars per barrel) Derivative, Average Price Risk Option Strike Price Schedule of Debt Schedule of Long-term Debt Instruments [Table Text Block] New Accounting Pronouncements and Changes in Accounting Principles [Abstract] ACCOUNTING AND DISCLOSURE CHANGES New Accounting Pronouncements and Changes in Accounting Principles [Text Block] Noncancelable operating leases Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract] 2019 Operating Leases, Future Minimum Payments Due, Next Twelve Months 2020 Operating Leases, Future Minimum Payments, Due in Two Years 2021 Operating Leases, Future Minimum Payments, Due in Three Years 2022 Operating Leases, Future Minimum Payments, Due in Four Years 2023 Operating Leases, Future Minimum Payments, Due in Five Years Thereafter Operating Leases, Future Minimum Payments, Due Thereafter Total Operating Leases, Future Minimum Payments Due Rental expense for operating leases Operating Leases, Rent Expense, Net DERIVATIVES Derivative Instruments and Hedging Activities Disclosure [Text Block] Effective tax rate Effective Income Tax Rate Reconciliation, Percent Statement of Stockholders' Equity [Abstract] Statement [Table] Statement [Table] Equity Components [Axis] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Additional Paid-in Capital Additional Paid-in Capital [Member] Accumulated Deficit Retained Earnings [Member] Accumulated Other Comprehensive (Loss) Income AOCI Attributable to Parent [Member] Equity Attributable to Common Stock Equity Attributable to Noncontrolling Interests Noncontrolling Interest [Member] Statement [Line Items] Statement [Line Items] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Beginning balance Net loss Net Income (Loss), Including Portion Attributable to Nonredeemable Noncontrolling Interest Contributions from noncontrolling interest holders, net Noncontrolling Interest, Increase from Sale of Parent Equity Interest Distributions to noncontrolling interest holders Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders Issuance of common stock Stock Issued During Period, Value, New Issues Other comprehensive income Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Share-based compensation, net APIC, Share-based Payment Arrangement, Increase for Cost Recognition Ending balance OTHER INFORMATION Other Information abstract Schedule of other current assets, net Schedule of Other Current Assets [Table Text Block] Schedule of accrued liabilities Schedule of Accrued Liabilities [Table Text Block] Estimated fair value of long-term debt Long-term Debt, Fair Value Debt carrying value OTHER INFORMATION OTHER INFORMATION. [Text Block] The entire disclosure for Other information. Working interest in Lost Hills field sold Percentage of Working Interest Sold The percentage of working interest sold. Total consideration of the sale of Lost Hills field 50% interest Disposal Group, Including Discontinued Operation, Consideration Proceeds from divestiture of businesses Proceeds From Sale of Productive Assets Including Purchase Price Adjustment Proceeds From Sale of Productive Assets Including Purchase Price Adjustment Number of well development plan included in the sale of Lost Host field Oil And Gas, Number Of Development Plan Included In Field Sold The number wells to be drilled in the development program in a field that is being sold. Minimum value of well development plan of Lost Hills field Oil And Gas Field, Development Plan, Minimum Value Estimated minimum value of development program in a field that is being sold. Proceeds from sale of assets Schedule of Defined Benefit Plans Disclosures [Table] Schedule of Defined Benefit Plans Disclosures [Table] Retirement Plan Type [Axis] Retirement Plan Type [Axis] Defined Benefit Plan and Other Postretirement Benefit Plan [Domain] Retirement Plan Type [Domain] Pension Benefit Pension Plan [Member] Postretirement Benefit Other Postretirement Benefits Plan [Member] Postretirement and Other Benefit Plans Disclosure Defined Benefit Plan Disclosure [Line Items] Net periodic benefit costs: Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract] Service cost Defined Benefit Plan, Service Cost Interest cost Defined Benefit Plan, Interest Cost Expected return on plan assets Defined Benefit Plan, Expected Return (Loss) on Plan Assets Recognized actuarial loss Defined Benefit Plan, Amortization of Gain (Loss) Settlement loss Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement Total Defined Benefit Plan, Net Periodic Benefit Cost (Credit) Employer contributions to pension plan Defined Benefit Plan, Plan Assets, Contributions by Employer Expected contribution to defined benefit pension plans during the reminder of 2019 Defined Benefit Plan, Expected Future Employer Contributions, Remainder of Fiscal Year Schedule of condensed balance sheet Condensed Balance Sheet [Table Text Block] Schedule of condensed income statement Condensed Income Statement [Table Text Block] Schedule of condensed cash flow statement Condensed Cash Flow Statement [Table Text Block] Interest-rate contract Interest Rate Cap [Member] One month LIBOR One Month Libor [Member] Represents one month LIBOR. Derivative, amount of hedged item Derivative, Amount of Hedged Item Interest rate to be in place to receive payment Derivative, Cap Interest Rate Inventory Disclosure [Abstract] Materials and supplies Other Inventory, Supplies, Gross Finished goods Inventory, Finished Goods, Gross Total Impairment on right-of-use asset Operating Lease, Impairment Loss Operating lease liabilities Lessee, Operating Lease, Liability, Payment, Due [Abstract] 2019 Lessee, Operating Lease, Liability, Payments, Due Next Twelve Months 2020 Lessee, Operating Lease, Liability, Payments, Due Year Two 2021 Lessee, Operating Lease, Liability, Payments, Due Year Three 2022 Lessee, Operating Lease, Liability, Payments, Due Year Four 2023 Lessee, Operating Lease, Liability, Payments, Due Year Five Thereafter Lessee, Operating Lease, Liability, Payments, Due after Year Five Less: Interest Lessee, Operating Lease, Liability, Undiscounted Excess Amount Present value of lease liabilities Operating Lease, Liability Finance lease liabilities Finance Lease, Liability, Payment, Due [Abstract] 2019 Finance Lease, Liability, Payments, Due Next Twelve Months 2020 Finance Lease, Liability, Payments, Due Year Two 2021 Finance Lease, Liability, Payments, Due Year Three 2022 Finance Lease, Liability, Payments, Due Year Four 2023 Finance Lease, Liability, Payments, Due Year Five Thereafter Finance Lease, Liability, Payments, Due after Year Five Less: Interest Finance Lease, Liability, Undiscounted Excess Amount Present value of lease liabilities Finance Lease, Liability Statement of Comprehensive Income [Abstract] Net income (loss) Net income attributable to noncontrolling interests Other comprehensive income: Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract] Reclassification of realized losses on pension and postretirement benefits to income(a) Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, after Tax Comprehensive income (loss) attributable to common stock Comprehensive Income (Loss), Net of Tax, Attributable to Parent Components of the net periodic benefit costs Schedule of Net Benefit Costs [Table Text Block] INVENTORIES Inventory Disclosure [Text Block] Noncontrolling Interest [Table] Noncontrolling Interest [Table] Collaborative Arrangement and Arrangement Other than Collaborative [Axis] Collaborative Arrangement and Arrangement Other than Collaborative [Axis] Collaborative Arrangement and Arrangement Other than Collaborative [Domain] Collaborative Arrangement and Arrangement Other than Collaborative [Domain] Ares JV Ares Joint Venture [Member] Represents Ares joint venture (Ares JV). BSP JV Benefit Street Partners [Member] Represents Benefit Street Partners (BSP). NONCONTROLLING INTERESTS Noncontrolling Interest [Line Items] Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward] Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward] Net (loss) income attributable to noncontrolling interests Schedule of Inventories Schedule of Inventory, Current [Table Text Block] New Accounting Pronouncements or Change in Accounting Principle [Table] New Accounting Pronouncements or Change in Accounting Principle [Table] Adjustments for New Accounting Pronouncements [Axis] Adjustments for New Accounting Pronouncements [Axis] Type of Adoption [Domain] Type of Adoption [Domain] Accounting Standards Update 2016-02 Accounting Standards Update 2016-02 [Member] Recently Issued Accounting and Disclosure Changes New Accounting Pronouncements or Change in Accounting Principle [Line Items] ROU asset obtained in exchange for lease obligations (in millions) Operating Lease Liability Other Information [Table] Other Information [Table] Other Information [Table] Other Information [Line Items] Other Information [Line Items] [Line Items] for Other Information [Table] Cash restricted for capital investments and distributions to a joint venture (JV) partner Restricted Cash and Cash Equivalents Other Current Assets Other Assets [Abstract] Derivative assets Derivative Asset, Current Amounts due from joint interest partners Due from Joint Ventures Prepaid expenses Prepaid Expense, Current Other Other Receivables Other current assets, net Accrued Liabilities Accrued Liabilities [Abstract] Accrued employee-related costs Employee-related Liabilities, Current Accrued taxes other than on income Accrual for Taxes Other than Income Taxes, Current Asset retirement obligation Asset Retirement Obligation, Current Operating lease liability Accrued interest Interest Payable, Current Other Other Accrued Liabilities, Current Accrued liabilities Non-current asset retirement obligation Asset Retirement Obligations, Noncurrent Common stock, shares, issued (in shares) Stock Issued During Period, Shares, Acquisitions Common stock, value, issued Business Combination, Consideration Transferred, Equity Interests Issued and Issuable Interest paid, net of capitalized amounts Interest Paid, Excluding Capitalized Interest, Operating Activities Basic EPS calculation Earnings Per Share, Basic [Abstract] Less: net income allocated to participating securities Undistributed Earnings (Loss) Allocated to Participating Securities, Basic Net income (loss) available to common stockholders Net Income (Loss) Available to Common Stockholders, Basic Weighted-average common shares outstanding - basic (in shares) Weighted Average Number of Shares Outstanding, Basic Diluted EPS calculation Earnings Per Share, Diluted [Abstract] Net income (loss) available to common stockholders Net Income (Loss) Available to Common Stockholders, Diluted Dilutive effect of potentially dilutive securities (in shares) Weighted Average Number Diluted Shares Outstanding Adjustment Weighted-average common shares outstanding - diluted (in shares) Weighted Average Number of Shares Outstanding, Diluted Weighted-average anti-dilutive shares (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Condensed Balance Sheet Statement [Table] Condensed Balance Sheet Statement [Table] Condensed Balance Sheet Statements, Captions [Line Items] Condensed Balance Sheet Statements, Captions [Line Items] Percentage of holding assets by subsidiaries in consolidated assets Percentage Of Holding Assets By subsidiaries In Consolidated Assets Percentage of total consolidated assets under financing agreement by subsidiary. Assets [Abstract] Assets [Abstract] Total current assets Total property, plant and equipment, net Investments in consolidated subsidiaries Investments in and Advances to Affiliates, Amount of Equity Liabilities and Equity [Abstract] Liabilities and Equity [Abstract] Total current liabilities Amounts due to (from) affiliates Due to Affiliate, Noncurrent Mezzanine equity Total equity Condensed Cash Flow Statement [Table] Condensed Cash Flow Statement [Table] Condensed Cash Flow Statements, Captions [Line Items] Condensed Cash Flow Statements, Captions [Line Items] Net cash (used) provided by operating activities Net cash used in investing activities Net cash provided (used) by financing activities Schedule of changes in noncontrolling interests Non-redeemable and Redeemable Noncontrolling Interest [Table Text Block] Tabular disclosure of non-redeemable and redeemable noncontrolling interest. CONDENSED CONSOLIDATING FINANCIAL INFORMATION Condensed Financial Information of Parent Company Only Disclosure [Text Block] Schedule of oil hedge positions Schedule of Derivative Instruments [Table Text Block] Schedule of fair value (at gross and net) of outstanding derivatives Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block] Redeemable Noncontrolling Interest, by Legal Entity [Table] Redeemable Noncontrolling Interest, by Legal Entity [Table] Class of Stock [Axis] Class of Stock [Axis] Class of Stock [Domain] Class of Stock [Domain] Mezzanine Equity - Redeemable Noncontrolling Interest - Ares Mezzanine Equity Redeemable Noncontrolling Interest [Member] This element represents mezzanine equity redeemable noncontrolling interest. Mezzanine Equity - Redeemable Noncontrolling Interests Temporary Equity [Line Items] Balance at the beginning of the period Net (loss) income attributable to noncontrolling interests Contributions from noncontrolling interest holders, net Temporary Equity, Increase From Contributions The amount of increase in temporary equity due to contributions. 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. Balance at the end of the period SUBSEQUENT EVENT Subsequent Events [Text Block] Pension and postretirement income, associated tax Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, Tax Cover page. Document Type Document Type Document Quarterly Report Document Quarterly Report Document Period End Date Document Period End Date Document Transition Report Document Transition Report Entity File Number Entity File Number Entity Registrant Name Entity Registrant Name Entity Central Index Key Entity Central Index Key Current Fiscal Year End Date Current Fiscal Year End Date Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Amendment Flag Amendment Flag Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Entity Tax Identification Number Entity Tax Identification Number Entity Address, Address Line One Entity Address, Address Line One Entity Address, Address Line Two Entity Address, Address Line Two Entity Address, City or Town Entity Address, City or Town Entity Address, State or Province Entity Address, State or Province Entity Address, Postal Zip Code Entity Address, Postal Zip Code City Area Code City Area Code Local Phone Number Local Phone Number Title of 12(b) Security Title of 12(b) Security Trading Symbol Trading Symbol Security Exchange Name Security Exchange Name Entity Current Reporting Status Entity Current Reporting Status Entity Interactive Data Current Entity Interactive Data Current Entity Filer Category Entity Filer Category Entity Small Business Entity Small Business Entity Emerging Growth Company Entity Emerging Growth Company Entity Shell Company Entity Shell Company Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Basis of Presentation Basis of Accounting, Policy [Policy Text Block] Schedule of disaggregated revenue Disaggregation of Revenue [Table Text Block]