Document and Entity Information Statement [Table] Statement REVENUE RECOGNITION Commodity Sales Contracts and Marketing Entity Registrant Name Entity Central Index Key Document Type Document Period End Date Amendment Flag Current Fiscal Year End Date Entity Current Reporting Status Entity Filer Category Entity Common Stock, Shares Outstanding Document Fiscal Year Focus Document Fiscal Period Focus Condensed Consolidated Balance Sheets Assets, Current [Abstract] CURRENT ASSETS Cash and Cash Equivalents, at Carrying Value Cash and cash equivalents-end of period Cash and cash equivalents-beginning of period Cash and cash equivalents Accounts Receivable, Net, Current Trade receivables Inventory, Net Inventories Total Other Assets, Current Other current assets, net Other current assets, net Assets, Current Total current assets Total current assets Property, Plant and Equipment, Gross PROPERTY, PLANT AND EQUIPMENT Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Accumulated depreciation, depletion and amortization Property, Plant and Equipment, Net Total property, plant and equipment, net Total property, plant and equipment, net Other Assets, Noncurrent OTHER ASSETS Other assets Assets TOTAL ASSETS Liabilities, Current [Abstract] CURRENT LIABILITIES Accounts Payable, Current Accounts payable Accrued Liabilities, Current Accrued liabilities Accrued liabilities Liabilities, Current Total current liabilities Total current liabilities 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 Carrying Amount Noncurrent LONG-TERM DEBT Long-term debt Carrying value as of the balance sheet of the deferred gain (loss) and issuance costs, net. Deferred Gain (Loss) and Issuance Costs, Net DEFERRED GAIN AND ISSUANCE COSTS, NET Net deferred gain and issuance costs Deferred gain and issuance costs, net Other Liabilities, Noncurrent OTHER LONG-TERM LIABILITIES Other long-term liabilities Redeemable Noncontrolling Interest, Equity, Carrying Amount [Abstract] MEZZANINE EQUITY Redeemable Noncontrolling Interest, Equity, Carrying Amount Balance Balance Redeemable noncontrolling interest Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract] EQUITY Preferred Stock, Value, Issued Preferred stock (20 million shares authorized at $0.01 par value) no shares outstanding at March 31, 2018 and December 31, 2017 Common Stock, Value, Issued Common stock (200 million shares authorized at $0.01 par value) outstanding shares (March 31, 2018 - 45,337,486 and December 31, 2017 - 42,901,946) Additional Paid in Capital, Common Stock Additional paid-in capital Retained Earnings (Accumulated Deficit) Accumulated deficit Accumulated Other Comprehensive Income (Loss), Net of Tax Accumulated other comprehensive loss Stockholders' Equity Attributable to Parent Total equity attributable to common stock Stockholders' Equity Attributable to Noncontrolling Interest Noncontrolling interests Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Balance Balance Total equity Liabilities and Equity TOTAL LIABILITIES AND EQUITY Preferred Stock, Shares Authorized Preferred stock, authorized shares Preferred Stock, Par or Stated Value Per Share Preferred stock, par value (in dollars per share) Preferred Stock, Shares Outstanding Preferred stock, outstanding shares Common Stock, Shares Authorized Common stock, authorized shares Common Stock, Par or Stated Value Per Share Common stock, par value (in dollars per share) Common Stock, Shares, Outstanding Common stock, outstanding shares Condensed Consolidated Statements of Operations Revenues [Abstract] REVENUES AND OTHER REVENUES Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise. Revenue from Contract with Customer, Excluding Assessed Tax Revenue from contract with customers Oil and gas sales Gain (Loss) on Derivative Instruments, Net, Pretax Net derivative (losses) gains Net derivative losses Other Operating Income Other revenue Revenues Total revenues and other Total revenues and other No definition available Costs and Other Deductions [Abstract] COSTS AND OTHER Production Costs, Period Cost Production costs Selling, General and Administrative Expense General and administrative expenses Depreciation, Depletion and Amortization Depreciation, depletion and amortization Taxes, Miscellaneous Taxes other than on income Exploration Expense Exploration expense Other Operating Income (Expense), Net Other expenses, net Total costs of sales, operating expenses, and nonoperating expenses for the period. Costs and Other Deductions Total costs and other Total costs and other Operating Income (Loss) OPERATING (LOSS) INCOME OPERATING INCOME Nonoperating Income (Expense) [Abstract] NON-OPERATING (LOSS) INCOME Pre-tax interest expense Interest and debt expense, net Gain (Loss) on Repurchase of Debt Instrument Net gains on early extinguishment of debt Net gains on early extinguishment of debt Gain (Loss) on Disposition of Assets Gains on asset divestitures Gains on asset divestitures Other Nonoperating Expense Other non-operating expenses Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest INCOME BEFORE INCOME TAXES Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Net income NET (LOSS) INCOME Net Income (Loss) Attributable to Noncontrolling Interest Net (income) loss attributable to noncontrolling interest Net (income) loss attributable to noncontrolling interests Net Income (Loss) Attributable to Parent NET (LOSS) INCOME ATTRIBUTABLE TO COMMON STOCK Net (loss) income attributable to common stock EARNINGS PER SHARE Net (loss) income attributable to common stock per share Earnings Per Share, Basic Basic (in dollars per share) Basic EPS (in dollars per share) Earnings Per Share, Diluted Diluted EPS (in dollars per share) Diluted (in dollars per share) Condensed Consolidated Statements of Comprehensive Income Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract] Other comprehensive income items: Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, for Net Gain (Loss), Net of Tax Reclassification to income of realized losses on pension and postretirement Other Comprehensive Income (Loss), Net of Tax Total other comprehensive income, net of tax Other comprehensive income Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Comprehensive (income) loss attributable to noncontrolling interest Comprehensive Income (Loss), Net of Tax, Attributable to Parent Comprehensive income attributable to common stock Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Unamortized Gain (Loss) Arising During Period, Tax Pension and postretirement income, associated tax Condensed Consolidated Statements of Cash Flows Net Cash Provided by (Used in) Operating Activities [Abstract] CASH FLOW FROM OPERATING ACTIVITIES Adjustments, Noncash Items, to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Adjustments to reconcile net income to net cash provided by operating activities: Derivative, Gain (Loss) on Derivative, Net Net derivative (gains) losses The net payment on derivative settlements, which reduce net income and are thus deducted when calculating cash provided by or used in operating activities. Payment on Derivative Settlements to Reconcile Net Income Loss to Cash Provided by Used in Operating Activities Net payments on settled derivatives The amount of amortization of deferred gains and deferred debt issuance costs. Amortization Of Deferred Gains And Debt Issuance Cost Amortization of deferred gain Other Noncash Income (Expense) Other non-cash charges to income, net Results of Operations, Dry Hole Costs Dry hole expenses Increase (Decrease) in Operating Capital Changes in operating assets and liabilities, net Net Cash Provided by (Used in) Operating Activities Net cash (used) provided by operating activities Net cash provided by operating activities Net Cash Provided by (Used in) Investing Activities [Abstract] CASH FLOW FROM INVESTING ACTIVITIES Payments to Acquire Property, Plant, and Equipment Capital investments Amount used to fund capital investments Represents the information pertaining to changes in capital investment accruals Increase Decrease In Capital Investment Accrual Changes in capital investment accruals Proceeds from Sale of Productive Assets Asset divestitures The cash outflows related to purchasing assets other than capital expenditures, including assets acquired as the result of a merger. Purchase of Assets, Net Acquisitions and other Net Cash Provided by (Used in) Investing Activities Net cash used in investing activities Net cash used in investing activities Net Cash Provided by (Used in) Financing Activities [Abstract] CASH FLOW FROM FINANCING ACTIVITIES Proceeds from Lines of Credit Proceeds from 2014 Revolving Credit Facility Repayments of Lines of Credit Repayments of 2014 Revolving Credit Facility Repayments of Senior Debt Payments on 2014 Term Loan Repayments of Subordinated Debt Debt repurchases Payments of Debt Restructuring Costs Debt transaction costs Proceeds from Noncontrolling Interests Contribution from noncontrolling interest holders, net Net proceeds from the transaction Payments of Ordinary Dividends, Noncontrolling Interest Distributions paid to noncontrolling interest holders Proceeds from Issuance of Common Stock Issuance of common stock Payments of Shares Cancelled for Taxes Shares canceled for taxes Net Cash Provided by (Used in) Financing Activities Net cash provided (used) by financing activities Net cash provided (used) by financing activities Cash and Cash Equivalents, Period Increase (Decrease) Increase (decrease) in cash and cash equivalents Increase in cash and cash equivalents Condensed Consolidated Statements of Equity Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Parent [Member] Equity Attributable to Common Stock Additional Paid In Capital [Member] Additional Paid-in Capital Retained Earnings [Member] Accumulated Deficit Accumulated Other Comprehensive Income [Member] Accumulated Other Comprehensive (Loss) Income Noncontrolling Interest [Member] Noncontrolling Interest Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (decrease) in Equity Net Income (Loss), Including Portion Attributable to Nonredeemable Noncontrolling Interest Net income (loss) Noncontrolling Interest, Increase from Sale of Parent Equity Interest Contributions from noncontrolling interest holders, net Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders Distributions paid to noncontrolling interest holders Stock Issued During Period, Value, New Issues Issuance of common stock Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition Share-based compensation, net Net Income (Loss) Attributable to Redeemable Noncontrolling Interest Net income attributable to redeemable noncontrolling interest No definition available. THE SPIN-OFF AND BASIS OF PRESENTATION 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). Spin Off and Basis of Presentation [Text Block] THE SPIN-OFF AND BASIS OF PRESENTATION ACCOUNTING AND DISCLOSURE CHANGES New Accounting Pronouncements and Changes in Accounting Principles [Text Block] ACCOUNTING AND DISCLOSURE CHANGES Other Information abstract OTHER INFORMATION The entire disclosure for Other information. OTHER INFORMATION. OTHER INFORMATION INVENTORIES Inventory Disclosure [Text Block] INVENTORIES DEBT Long-term Debt [Text Block] DEBT NONCONTROLLING INTERESTS Noncontrolling Interest Disclosure [Text Block] NONCONTROLLING INTERESTS LAWSUITS, CLAIMS, COMMITMENTS AND CONTINGENCIES Commitments and Contingencies Disclosure [Text Block] LAWSUITS, CLAIMS, COMMITMENTS AND CONTINGENCIES DERIVATIVES Derivative Instruments and Hedging Activities Disclosure [Text Block] DERIVATIVES Earnings Per Share [Text Block] EARNINGS PER SHARE PENSION AND POSTRETIREMENT BENEFIT PLANS Pension and Other Postretirement Benefits Disclosure [Text Block] PENSION AND POSTRETIREMENT BENEFIT PLANS No definition available. REVENUE RECOGNITION The entire disclosure of revenue from contract with customer to transfer good or service and to transfer nonfinancial asset. Includes, but is not limited to, disaggregation of revenue, credit loss recognized from contract with customer, judgment and change in judgment related to contract with customer, and asset recognized from cost incurred to obtain or fulfill contract with customer. Excludes insurance and lease contracts. Revenue from Contract with Customer [Text Block] REVENUE RECOGNITION INCOME TAXES Income Tax Disclosure [Text Block] INCOME TAXES SUBSEQUENT EVENTS Subsequent Events [Text Block] SUBSEQUENT EVENT No definition available. CONDENSED CONSOLIDATING FINANCIAL INFORMATION Condensed Financial Statements [Text Block] CONDENSED CONSOLIDATING FINANCIAL INFORMATION Basis of Accounting, Policy [Policy Text Block] Basis of Presentation Schedule of Other Current Assets [Table Text Block] Schedule of other current assets Schedule of Accrued Liabilities [Table Text Block] Schedule of accrued liabilities Schedule of Inventory, Current [Table Text Block] Schedule of Inventories Schedule of Long-term Debt Instruments [Table] Debt Instrument [Line Items] Debt instrument Debt Schedule of Long-term Debt Instruments [Table Text Block] Schedule of Debt Tabular disclosure of non-redeemable and redeemable noncontrolling interest. Non-redeemable and Redeemable Noncontrolling Interest [Table Text Block] Schedule of changes in noncontrolling interests Derivative [Table] Derivative [Line Items] Schedule of Derivative Instruments [Table Text Block] Schedule of oil hedge positions Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block] Schedule of fair value (at gross and net) of outstanding derivatives Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Calculation of basic and diluted EPS Schedule of Net Benefit Costs [Table Text Block] Components of the net periodic benefit costs Disclosure of information when using transition method for cumulative effect in initial period of application for revenue from contract with customer. Revenue, Initial Application Period Cumulative Effect Transition [Table] Tabular disclosure of disaggregation of revenue into categories depicting how nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factor. Disaggregation of Revenue [Table Text Block] Schedule of disaggregated revenue Schedule of New Accounting Pronouncements and Changes in Accounting Principles [Table Text Block] Schedule of the impact of the adoption of ASC 606 on our condensed consolidated statement of operations Condensed Balance Sheet [Table Text Block] Schedule of Condensed Consolidating Balance Sheet Condensed Income Statement [Table Text Block] Schedule of condensed consolidating statement of operations Condensed Cash Flow Statement [Table Text Block] Schedule of Condensed Consolidating Statement of Cash Flows Schedule of Restructuring and Related Costs [Table] Restructuring Type [Axis] Type Of Restructuring [Domain] Type of Restructuring [Domain] Spinoff [Member] Spinoff - CRC Disclosures related to the spin-off of California Resources Corporation from Occidental Petroleum Corporation. Separation and Spin Off Transactions [Line Items] Separation and Spin Off Transactions Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners Percentage of outstanding shares of common stock initially retained by Occidental Percentage of common interest held by non-controlling interests Amount due from joint venture partners included in Other current assets Amounts due from joint interest partners Derivative Asset, Current Derivative assets from commodities contracts Prepaid Expense, Current Prepaid expenses Assets Held-for-sale, Not Part of Disposal Group, Current Assets held for sale Derivative Liability, Current Derivative liabilities from commodities contracts Accrual for Taxes Other than Income Taxes, Current Accrued taxes other than on income Interest Payable, Current Accrued interest Accrued Bonuses, Current Accrued employee-related costs Other Accrued Liabilities, Current Other Asset Retirement Obligations, Noncurrent Non-current asset retirement obligation Interest Paid, Net Interest paid, net of capitalized amounts Other Inventory, Supplies, Gross Materials and supplies Inventory, Finished Goods, Gross Finished goods Long-term Debt, Type [Axis] Longterm Debt Type [Domain] Long-term Debt, Type [Domain] Represents the senior notes payable that bear an interest rate of 8.00 percent and will mature in 2022. Senior Notes800 Percent Due2022 [Member] 8% Notes Due 2022 Represents the senior notes payable that bear an interest rate of 5.00 percent and will mature in 2020. Senior Notes500 Percent Due2020 [Member] 5% Notes Due 2020 Represents the senior notes payable that bear an interest rate of 5.50 percent and will mature in 2021. Senior Notes550 Percent Due2021 [Member] 5.5% Notes Due 2021 Long-term Debt, Unclassified [Abstract] Debt Repurchases of debt Long-term debt Debt carrying value Debt Instrument, Basis Spread on Variable Rate Interest rate added to variable rate basis (as a percent) Debt Instrument, Interest Rate, Stated Percentage Debt instrument interest rate stated percentage 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. Period Before Maturity of Second Debt, Maturity of First Debt that Triggers Accelerated Payment Period before maturity of the specified notes that triggers accelerated payment The outstanding amount of certain notes that triggers the acceleration of the maturity of debt instrument under a credit agreement. Debt Instrument Covenant, Outstanding Amount, Maturity Trigger Outstanding amount of specified notes that triggers accelerated payment Amount of long-term debt payable in June 2021. Long Term Debt Maturities Repayments Of Principal In June 2021 Amount due in June 2021 Amount of long-term debt payable in December 2021. Long Term Debt Maturities Repayments Of Principal In December 2021 Amount due in December 2021 Long-term Debt, Maturities, Repayments of Principal in Year Four Amount due in June 2022 The amount of debt premium that was originally recognized on exchange of the instrument that has yet to be amortized. Debt Instrument Unamortized Premium On Exchange Of Debt Deferred gains Deferred Finance Costs, Net Transaction cost Deferred issuance costs Represents the amount of debt discount at the time of issuance. Debt Original Issue Discount Original issue discount Repayments of Long-term Debt Payments on long-term debt Debt Instrument, Face Amount Amount borrowed Line of Credit Facility, Current Borrowing Capacity Available borrowing capacity, subject to minimum liquidity requirement Amount of minimum monthly liquidity required to maintain, per debt covenant agreement. Debt Instrument Covenant Minimum Monthly Liquidity Minimum monthly liquidity The amount of money that maybe borrowed based on the value of the collateral the entity pledges. Debt Borrowing Base Borrowing base 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. Line Of Credit Facility Maximum Borrowing Capacity Letters Of Credit Sublimit Maximum sub-limit on borrowing capacity for issuance of letters of credit Letters of Credit Outstanding, Amount Aggregate letters of credit issued Debt Instrument, Repurchased Face Amount Principal amount of debt reduction through payment or repurchase Aggregate principal amount Debt Instrument, Repurchase Amount Repurchase value of the principal amounts Debt instrument repurchase amount Gains (Losses) on Extinguishment of Debt Pre-tax gain on extinguishment of debt Pre tax gain Write off of Deferred Debt Issuance Cost deferred issuance costs written-off Long-term Debt, Fair Value Estimated fair value of long-term debt Noncontrolling Interest [Table] Noncontrolling Interest [Line Items] NONCONTROLLING INTERESTS Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward] Noncontrolling Interest in Net Income (Loss) Joint Venture Partners, Nonredeemable Net income (loss) attributable to noncontrolling interest Redeemable Noncontrolling Interest, by Legal Entity [Table] Temporary Equity [Line Items] Mezzanine Equity - Redeemable Noncontrolling Interest - Ares Noncontrolling Interest in Net Income (Loss) Joint Venture Partners, Redeemable Net income (loss) attributable to noncontrolling interest Temporary Equity, Stock Issued During Period, Value, New Issues Contributions from noncontrolling interest holders, net 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. Noncontrolling Interest, Decrease from Distributions to Redeemable Noncontrolling Interest Holders Distributions to noncontrolling interest holders Schedule of Business Acquisitions, by Acquisition [Table] Business Acquisition [Axis] Business Acquisition Acquiree [Domain] Business Acquisition, Acquiree [Domain] Represents the information pertaining to joint venture with benefit street partners of divestitures and other. Joint Venture With Benefit Street Partners [Member] Joint venture with BSP Represents the information pertaining to joint venture with Macquarie Infrastructure and Real Assets Inc (MIRA). Joint Venture With Macquarie Infrastructure And Real Assets Inc [Member] Joint venture with MIRA Legal Entity [Axis] Entity [Domain] Entity [Domain] Represents Benefit Street Partners (BSP). Benefit Street Partners [Member] BSP JV Represents Macquarie Infrastructure and Real Assets Inc. (MIRA). Macquarie Infrastructure And Real Assets Inc [Member] MIRA Acquisition NONCONTROLLING INTERESTS Represents the capacity of power plant. Property, Plant and Equipment, Power Plant Capacity Power plant capacity Represents the capacity of gas processing plant. Property, Plant and Equipment, Gas Processing Plant Capacity Gas processing plant capacity Noncontrolling Interest, Ownership Percentage by Parent Percentage of common interest held by CRC Period of which monthly distributions can be deferred, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days Monthly Distributions Deferral Period Period in which monthly distributions can be deferred Financial Instruments Subject to Mandatory Redemption, Settlement Terms, Share Value, Amount Redemption price Redemption period of financial instruments, including equity instruments, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Redemption Period Of Financial Instruments Redemption period The option to extension additional period of redemption. Redemption Period, Extended Maximum extension period of redemption The period of make whole payment and maximum redemption period. Period of Make Whole Payment and Maximum Redemption Period Whole payment redemption happen prior period Represents the total maximum investment commitment in the joint venture. Total Investment Commitment in Joint Venture, Maximum Maximum commitment contribution The amount of additional payment required to redeem preferred interest in joint venture. Additional Payment to Redeem Preferred Interest in Joint Venture Additional payment to redeem preferred interest Number of commitments funded Number Of Commitments Funded Number of $50 commitments funded Payments to Acquire Interest in Joint Venture Commitment contributed Expenses paid for Joint venture issuance fee. Joint Venture Issuance Fee Issuance fee Working interest in exchange for an investment in a joint venture. Joint Venture, Working Interest Acquired Working interest acquired by MIRA (as a percent) Percentage of funding provided to a joint venture to achieve its goals per agreement. Joint Venture Investment Funding Percentage Funding provided by MIRA for development of properties (as a percent) Percentage of working interest retained in certain properties in a joint venture agreement with another property to develop certain properties owned by the entity. Joint Venture Working Interest Retained In Properties Working interest retained by CRC (as a percent) The working interest that reverts to the entity when the targeted rate of return of the counterparty is achieved. Joint Venture, Working Interest After Counterparty Return CRC's working interest if MIRA receives cash distributions equal to a predetermined threshold return (as a percent) Represents the initial investment commitment in the joint venture. Initial Investment Commitment in Joint Venture Initial commitment Represents investment period for the initial commitment in a joint venture, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Joint Venture, Initial Investment, Investment Period Investment period of initial commitment Derivative Instruments and Hedging Activities Disclosures [Table] Information about the production period subject to hedge instruments. Hedge Production Periods [Axis] Identified production period subject to hedge instruments. Hedge Production Periods [Domain] Hedge Production Periods [Domain] Represents the entity's production from January Through December 2020. January Through December2020 Production [Member] FY 2020 Represents the entity's production during the second quarter of 2018. Second Quarter Production2018 [Member] Q2 2018 Represents the entity's production during the third quarter of 2018. Third Quarter Production2018 [Member] Q3 2018 Represents the entity's production during the fourth quarter of 2018. Fourth Quarter Production2018 [Member] Q4 2018 Represents the entity's production during the first quarter of 2019. First Quarter Production2019 [Member] Q1 2019 Represents the entity's production during the second quarter of 2019. Second Quarter Production2019 [Member] Q2 2019 Represents the entity's production during the third quarter of 2019. Third Quarter Production2019 [Member] Q3 2019 Represents the entity's production during the fourth quarter of 2019. Fourth Quarter Production2019 [Member] Q4 2019 Represents the entity's production from June Through December 2018. June Through December2018 Production [Member] Second half of 2018 production Derivative Instruments and Hedging Activities Disclosures [Line Items] Derivatives Derivative, Nonmonetary Notional Amount Daily Volume (in Bbl) Derivative, Average Price Risk Option Strike Price Weighted-average price (in dollars per barrel) Represents the maximum increase in counter-party option swaps for the period. Counter Party Option Swaps, Increase For The Period, Maximum Maximum increase in volume for the period of crude oil counterparties swaps (in barrels per day) The average strike price on the group of price risk option contracts such as put options or call options in the maximum increase in counter-party option swaps for the period. Counter Party Option Swaps, Increase For The Period, Maximum, Average Price Risk Option Strike Price Weighted-average Brent price (in dollars per barrel) Represents the maximum increase in counter-party option swaps per quarter. Counter Party Option Swaps, Increase Per Quarter, Maximum Maximum increase in volume per quarter of crude oil counter-party swaps (in barrels per day) The average strike price on the group of price risk option contracts such as put options or call options in the maximum increase in counter-party option swaps per quarter. Counter Party Option Swaps, Increase Per Quarter, Maximum, Average Price Risk Option Strike Price Weighted-average Brent price (in dollars per barrel) Offsetting Assets [Table] Balance Sheet Location [Axis] Balance Sheet Location [Domain] Balance Sheet Location [Domain] Other Current Assets [Member] Other current assets Accrued Liabilities [Member] Accrued liabilities Offsetting Assets [Line Items] Fair Value of Derivatives Derivative Asset, Fair Value, Gross Asset Gross Amounts Recognized at Fair Value Derivative Asset, Fair Value, Gross Liability Gross Amounts Offset in the Balance Sheet Derivative Asset Net Fair Value Presented in the Balance Sheet Derivative Liability, Fair Value, Gross Liability Gross Amounts Recognized at Fair Value Derivative Liability, Fair Value, Gross Asset Gross Amounts Offset in the Balance Sheet Derivative Liability Net Fair Value Presented in the Balance Sheet Derivative Assets (Liabilities), at Fair Value, Net Total derivatives Basic Earnings Per Share Basic EPS calculation Undistributed Earnings Allocated to Participating Securities Less: net income (loss) allocated to participating securities Net Income (Loss) Available to Common Stockholders, Basic Net (loss) income available to common stockholders Weighted Average Number of Shares Outstanding, Basic Weighed-average common shares outstanding - basic Earnings Per Share, Diluted [Abstract] Diluted EPS calculation Net Income (Loss) Available to Common Stockholders, Diluted Net (loss) income available to common stockholders Weighted Average Number Diluted Shares Outstanding Adjustment Dilutive effect of potentially dilutive securities Weighted Average Number of Shares Outstanding, Diluted Weighted-average common shares outstanding - diluted Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Weighted-average anti-dilutive shares Schedule of Defined Benefit Plans Disclosures [Table] Defined Benefit Plans and Other Postretirement Benefit Plans [Axis] Defined Benefit Plans [Domain] Defined Benefit Plan and Other Postretirement Benefit Plan [Domain] Pension Plans Defined Benefit [Member] Pension Benefit Other Postretirement Benefit Plans Defined Benefit [Member] Postretirement Benefit Defined Benefit Plan Disclosure [Line Items] Postretirement and Other Benefit Plans Disclosure Defined Benefit Plan, Net Periodic Benefit Cost [Abstract] Net periodic benefit costs: Defined Benefit Plan, Service Cost Service cost Defined Benefit Plan, Interest Cost Interest cost Defined Benefit Plan, Expected Return on Plan Assets Expected return on plan assets Defined Benefit Plan, Recognized Net Gain (Loss) Due to Settlements Settlement loss Defined Benefit Plan, Net Periodic Benefit Cost Net periodic benefit costs Defined Benefit Plan, Contributions by Employer Employer contributions to pension plan Defined Benefit Plans, Estimated Future Employer Contributions in Current Fiscal Year Expected contribution to defined benefit pension plans during the reminder of 2018 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. Term of Payment after Invoicing for Contracts with Customers Term of payment following invoicing Period of natural gas liquids contract, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Maximum Duration of Natural Gas Liquid Contract Maximum duration of natural gas liquid contract (in years) Disclosure of information about disaggregation of revenue into categories depicting how nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factor. Disaggregation of Revenue [Table] Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Disaggregation of Revenue [Line Items] Disaggregation of revenue Interest Income, Other Interest income Information about effect of transition method for cumulative effect in initial period of application. Initial Application Period Cumulative Effect Transition [Axis] Effect of transition method for cumulative effect in initial period of application. Initial Application Period Cumulative Effect Transition [Domain] Initial Application Period Cumulative Effect Transition [Domain] Effect in current period from application of guidance for revenue from contract with customer compared with guidance for revenue recognition applicable prior to change when using transition method for cumulative effect in period including initial date of application. Difference Between Revenue Guidance In Effect Before And After Topic606 [Member] Effect of Change Higher/(Lower) Calculated under guidance for revenue recognition in effect prior to change to new guidance for revenue from contract with customer when using transition method for cumulative effect in period including initial date of application. Calculated Under Revenue Guidance In Effect Before Topic606 [Member] Balances without Adoption of ASC 606 Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Revenue, Initial Application Period Cumulative Effect Transition [Line Items] Revenue recognition Subsequent Event [Table] Subsequent Event [Line Items] SUBSEQUENT EVENTS Acquisition Costs, Period Cost Acquisition cost Number of employees currently working in particular location. Number of Employees Approximate number of employees in Bakersfield Number of different locations in Bakersfield across multiple leases. Number of Locations Number of different locations in Bakersfield The duration required to bring all employees into single location. Duration to Bring All Employees Into Single Location Expected period to bring all Bakersfield employees into single location Term of occupying the property by the former owner as a tenant, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Term of Occupying Property by Former Owner Term of occupying space as a tenant by former owner Rental Income, Nonoperating Rental income The remaining amount required to invest in evaluation and development activities. Commitments to Invest for Evaluation and Development, Remaining Remaining commitments to invest an oil and gas property The acquisition costs paid in cash during the period (excluded from amortization) to purchase, lease or otherwise acquire an unproved property, including costs of lease bonuses and options to purchase or lease properties, the portion of costs applicable to minerals when land including mineral rights is purchased in fee, brokers' fees, recording fees, legal costs, and other costs incurred in acquiring properties. Acquisition Costs, Period Cost, Cash Acquisition cost paid in cash The acquisition costs paid in shares of stocks during the period (excluded from amortization) to purchase, lease or otherwise acquire an unproved property, including costs of lease bonuses and options to purchase or lease properties, the portion of costs applicable to minerals when land including mineral rights is purchased in fee, brokers' fees, recording fees, legal costs, and other costs incurred in acquiring properties. Acquisition Costs, Period Cost, Shares of Stocks Acquisition costs paid in common shares The percentage of working interest acquired. Percentage of Working Interest Hold Working interest held (as a percentage) The percentage of net revenue interest acquired. Percentage of Net Revenue Interest Hold Net revenue interest held (as a percentage) Period of time to resale in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Resale Agreement Counterparty, Register of Resale for Shares, Duration Number of business days to register common shares for resale after filling 10-Q The number of shares can be resell with in 30 days of registration. Resale Agreement Counterparty, Number of Shares Resale First Thirty Days of Registration Maximum number of shares resale in first 30 days registration The number of shares can be resell after 30 days of registration. Resale Agreement Counterparty, Number of Shares Resale After Thirty Days of Registration Maximum number of shares resale on after 30 days registration The number of properties of which investment in evaluation and development activities are extended Number Of Properties, Investment Commitment Extended Number of and oil and gas properties in which evaluation and development activities are extended The period by which the investment in evaluation and development activities are extended. Properties, Investment Commitment Extension Period of extension of evaluation and development activities Condensed Balance Sheet Statement [Table] Percentage of total consolidated assets under financing agreement by subsidiary. Percentage Of Holding Assets By subsidiaries In Consolidated Assets Total consolidated assets held by Non-Guarantor Subsidiaries (as a percent) Assets [Abstract] Assets Long-term Investments Investments in consolidated subsidiaries Due To (From) Affiliate, Noncurrent Amounts due to (from) affiliates Temporary Equity, Carrying Amount, Including Portion Attributable to Noncontrolling Interests Mezzanine equity Net Income (Loss) Available to Common Stockholders, Basic [Abstract] NET (LOSS) INCOME ATTRIBUTABLE TO COMMON STOCK Nonoperating Income (Expense) Non-operating (loss) income Adjustments for New Accounting Pronouncements [Axis] Type Of Adoption [Member] Type of Adoption [Domain] Accounting Standards Update201409 [Member] ASU 2014-09 Related Party [Axis] Related Party [Domain] Related Party [Domain] Represents information pertaining to occidental petroleum and subsidiaries. Occidental Petroleum And Subsidiaries [Member] Occidental Petroleum Other Noncurrent Liabilities [Member] Other long-term liabilities Debt Instrument [Axis] Debt Instrument Name [Domain] Debt Instrument, Name [Domain] Secured Debt [Member] 2014 Revolving Credit Facility (Shared First Priority Lien) Represents information pertaining to Secured First Lien Second Out Credit Agreement which is entered into by entity in 2017. Secured First Lien Second Out Credit Agreement2017 [Member] 2017 Credit Agreement (Shared First Priority Lien) Represents information pertaining to Secured First Lien Second Out Credit Agreement which is entered into by entity in 2016. Secured First Lien Second Out Credit Agreement [Member] 2016 Credit Agreement (Shared First Priority Lien) Senior Lien [Member] Second Lien Notes Senior Notes [Member] Senior Notes (Unsecured) Variable Rate [Axis] Variable Rate [Domain] Variable Rate [Domain] London Interbank Offered Rate L I B O R [Member] Applicable margin on LIBOR loans Represents alternate base rate Debt Instrument Variable Rate Base Rate [Member] Applicable margin on Alternate Base Rate loans Represents the senior notes payable that bear an interest rate of 6.00 percent and will mature in 2024. Senior Notes600 Percent Due2024 [Member] 6% Notes Due 2024 Range [Axis] Range [Member] Range [Domain] Minimum [Member] Minimum Maximum [Member] Maximum Scenario [Axis] Scenario Unspecified [Domain] Scenario, Unspecified [Domain] The scenario when 2016 Credit Agreement has $100 million outstanding amount 91 days prior to maturity. Credit Agreement201691 Days Prior To Maturity100 Million Outstanding [Member] 91 days prior to maturity of 2016 Credit Agreement Letter Of Credit [Member] Letters of Credit Credit Facility [Axis] Credit Facility [Domain] Credit Facility [Domain] Revolving Credit Facility [Member] 2014 Revolving Credit Facility Type of Arrangement and Non-arrangement Transactions [Axis] Arrangements And Nonarrangement Transactions [Member] Arrangements and Non-arrangement Transactions [Domain] Represents Ares joint venture (Ares JV). Ares Joint Venture [Member] Ares JV Class of Stock [Axis] Class Of Stock [Domain] Class of Stock [Domain] This element represents mezzanine equity redeemable noncontrolling interest. Mezzanine Equity Redeemable Noncontrolling Interest [Member] Mezzanine Equity - Redeemable Noncontrolling Interest Common Class A [Member] Class A common interest Series B Preferred Stock [Member] Class B preferred interest Common Class C [Member] Class C common interest Co Venturer [Member] ECR Corporate Holdings L.P. This member represents ECR corporate holdings Ecr Corporate Holdings [Member] ECR Public Utility [Axis] Utility Plant [Domain] Utility Plant [Domain] Represents Natural Gas Power And Gas Processing Plants. Natural Gas Power And Gas Processing Plants [Member] Natural gas power and Gas processing plants Debt Instrument, Redemption, Period [Axis] Debt Instrument Redemption Period [Domain] Debt Instrument, Redemption, Period [Domain] Debt Instrument Redemption Period One [Member] Redemption prior to fifth year Debt Instrument Redemption Period Two [Member] Redemption prior to seven and a half years Scenario Forecast [Member] Expected Derivative Instrument [Axis] Derivative Contract Type [Domain] Derivative Contract [Domain] Call Option [Member] Calls Put Option [Member] Puts Swap [Member] Swaps Position [Axis] Position [Domain] Position [Domain] Long [Member] Purchased Short [Member] Sold Measurement Basis [Axis] Portion At Fair Value Fair Value Disclosure [Member] Portion at Fair Value Measurement [Member] Carrying Reported Amount Fair Value Disclosure [Member] Presented in the Balance Sheet Estimate Of Fair Value Fair Value Disclosure [Member] Recognized Fair Value Commodity Contract [Member] Commodity Contracts Other Assets [Member] Other assets Products and Services [Axis] Products And Services [Domain] Products and Services [Domain] Oil Reserves [Member] Oil Natural Gas Liquids Reserves [Member] NGLs Natural Gas Reserves [Member] Natural gas This member represents electricity sales. Sale Of Electricity [Member] Electricity This member represents marketing trading income. Trading Income From Marketing [Member] Marketing Subsequent Event Type [Axis] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Subsequent Event [Member] SUBSEQUENT EVENT Property, Plant and Equipment, Type [Axis] Property Plant And Equipment Type [Domain] Property, Plant and Equipment, Type [Domain] Office Building [Member] Office building Land [Member] Land Finite-Lived Intangible Assets by Major Class [Axis] Finite Lived Intangible Assets Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Use Rights [Member] Working, surface and mineral interests Geographical [Axis] Segment Geographical [Domain] Geographical [Domain] Represents information pertaining to Elk Hills. Elk Hills [Member] Elk Hills Represents the Elk Hills Transaction. Elk Hills Transaction [Member] Elk Hills Transaction Represents Registration Rights Agreement. Registration Rights Agreement [Member] Registration Rights Agreement Parent Company [Member] Parent Guarantor Subsidiaries [Member] Combined Guarantor Subsidiaries Non Guarantor Subsidiaries [Member] Combined Non-Guarantor Subsidiaries Consolidation Items [Axis] Consolidation Items [Domain] Consolidation Items [Domain] Reportable Legal Entities [Member] Reportable Legal Entity Consolidation Eliminations [Member] Eliminations