Document and Entity Information Statement [Table] Statement REVENUE RECOGNITION Commodity Sales Contracts and Marketing Entity Registrant Name Entity Central Index Key Document Type Current Fiscal Year End Date Document Fiscal Year Focus Document Fiscal Period Focus Document Period End Date Amendment Flag Entity Current Reporting Status Entity Filer Category Entity Small Business Entity Emerging Growth Company Entity Common Stock, Shares Outstanding Condensed Consolidated Balance Sheets Assets, Current [Abstract] CURRENT ASSETS Cash 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 September 30, 2018 and December 31, 2017 Common Stock, Value, Issued Common stock (200 million shares authorized at $0.01 par value) outstanding shares (September 30, 2018 - 48,565,905 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 Ending balance Beginning 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 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 (loss) gain from commodity contracts Net derivative loss from commodity contracts 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 Exploration expenses 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 (LOSS) 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 gain on early extinguishment of debt Net gain on early extinguishment of debt Gain (Loss) on Disposition of Assets Gain on asset divestitures Gain on asset divestitures Gain on non-core assets divestitures Other Nonoperating Expense Other non-operating expenses Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest INCOME (LOSS) BEFORE INCOME TAXES INCOME BEFORE INCOME TAXES Income Tax Expense (Benefit) Income tax Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Net income (loss) NET INCOME (LOSS) NET INCOME Net Income (Loss) Attributable to Noncontrolling Interest Net income attributable to noncontrolling interests Net Income (Loss) Attributable to Parent NET INCOME (LOSS) ATTRIBUTABLE TO COMMON STOCK Net income (loss) attributable to common stock EARNINGS PER SHARE Net income (loss) 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 of realized losses on pension and postretirement benefits to income Other Comprehensive Income (Loss), Net of Tax Total other comprehensive income Other comprehensive income Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Comprehensive income attributable to noncontrolling interest Comprehensive Income (Loss), Net of Tax, Attributable to Parent Comprehensive income (loss) 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 (loss) to net cash provided by operating activities: Derivative, Gain (Loss) on Derivative, Net Net derivative loss (gain) from commodity contracts 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. Proceeds (Payments) on Derivative Settlements to Reconcile Net Income Loss to Cash provided by Used in Operating Activities Net (payments) proceeds on settled commodity 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 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 Proceeds from sale of non-core assets 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 Acquisition cost Payments for (Proceeds from) Other Investing Activities 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 Contributions from noncontrolling interest holders, net Net proceeds received by CRC 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, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Increase (decrease) in cash Increase in cash Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Cash-end of period Cash-beginning of period 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] Equity Attributable to Noncontrolling Interest Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (decrease) in Equity Net Income (Loss), Including Portion Attributable to Nonredeemable Noncontrolling Interest Net (loss) income 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 Value of common stock at issuance Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition Share-based compensation, net Stock Issued During Period, Shares, New Issues CRC shares issued to Ares-led investor group in a private placement Common stock shares issued (in shares) 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 JOINT VENTURES Equity Method Investments and Joint Ventures Disclosure [Text Block] JOINT VENTURES No definition available. ACQUISITIONS AND DIVESTITURES The entire disclosure for acquisitions and divestitures. Acquisitions and Divestitures [Text Block] ACQUISITIONS AND DIVESTITURES 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 REVENUE RECOGNITION Revenue from Contract with Customer [Text Block] REVENUE RECOGNITION INCOME TAXES Income Tax Disclosure [Text Block] INCOME TAXES 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, net 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 Schedule of Business Acquisitions, by Acquisition [Table] Acquisition JOINT VENTURES ACQUISITIONS AND DIVESTITURES Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block] Summary of total consideration, including customary closing adjustments, and allocation of the consideration based on fair value of assets acquired as of acquisition date 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 Revenue, Initial Application Period Cumulative Effect Transition [Table] Revenue, Initial Application Period Cumulative Effect Transition [Line Items] Revenue recognition 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 statements 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] 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 ECR Restricted Cash and Cash Equivalents Cash restricted under our joint venture agreements 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 Asset held for sale Other Receivables Other Derivative Liability, Current Derivative liabilities from commodities contracts Accrual for Taxes Other than Income Taxes, Current Accrued taxes other than on income Accrued Bonuses, Current Accrued employee-related costs Interest Payable, Current Accrued interest Other Accrued Liabilities, Current Other Asset Retirement Obligations, Noncurrent Non-current asset retirement obligation Interest Paid, Net Interest paid, net of capitalized amounts Stock Issued During Period, Shares, Acquisitions Stock issued in connection with acquisition ( in shares ) Stock Issued During Period, Value, Acquisitions Value of common stock at issuance 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 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 2016 Credit Agreement 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 2016 Credit Agreement notes that triggers accelerated payment Amount of long-term debt payable in June 2021. Long Term Debt Maturities Repayments Of Principal In June 2021 Principal amount due by June 2021 Amount of long-term debt payable in December 2021. Long Term Debt Maturities Repayments Of Principal In December 2021 Principal amount due by December 2021 Long-term Debt, Maturities, Repayments of Principal in Year Four Principal amount due by 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 Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net Deferred issuance costs and original issue discounts 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 month end 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 Face (par) amount of the original debt instrument that was repurchased during the period. Debt Instrument, Repurchased Face Amount1 Principal amount of debt reduction through payment or repurchase Early Repayment of Senior Debt Repurchase value of the principal amounts Gains (Losses) on Extinguishment of Debt Pre-tax gain on extinguishment of debt, net of a reduction in deferred issuance costs Long-term Debt, Fair Value Estimated fair value of long-term debt Maximum amount that can be drawn from credit line to purchase certain notes and debts. Debt Instrument Covenant, Maximum Amount To Draw To Purchase Debt Amount that can be drawn to repurchase Second Lien Notes and Senior Notes at a discount to par Amount of minimum liquidity required to repurchase notes and notes. Debt Instrument Covenant, Minimum Liquidity Minimum liquidity to repurchase indebtedness Represents the percentage of change in variable interest rate of debt during the period. Percentage Of Change In Variable Interest Rate Of Debt Percentage of change in the variable interest rates Represents the increase in annual interest expense due to 1/8 percent change in variable interest rate of debt during the period. Increase In Interest Expense Due To One By Eighth Percent Change In Interest Rate Effect of 1/8 percent change in annual interest expense 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 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 Costs incurred by entity in entering into joint venture agreement. Joint Venture Transaction Cost Joint venture transaction cost 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 Make-whole payment redemption period Proceeds from Issuance of Private Placement Purchase price of the CRC shares issued to Ares-led investor group in a private placement Represents the total maximum investment commitment in the joint venture. Total Investment Commitment in Joint Venture, Maximum Maximum commitment contribution Payments to Acquire Interest in Joint Venture Commitment contributed Number of commitments funded Number Of Commitments Funded Number of equal funding 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 The amount of reduction in committed amounts of initial investment. Reduced Commitment investment in Joint Venture Reduced commitment amount The maximum percentage of commitment of program amount. Maximum Percentage of Commitment of Program Amount Maximum percentage of program amount Number of joint ventures entered into by the entity. Number Of Joint Ventures Entered Number of joint ventures entered into 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 commitment period Property, Plant and Equipment [Line Items] ACQUISITIONS AND DIVESTITURES Area of Land Area of land Business Combination, Consideration Transferred Purchase price Consideration Business Combination, Consideration Transferred, Liabilities Incurred Liabilities assumed Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Consideration Transferred Purchase price adjustment Purchase price adjustment Reduction of royalty interest in one of oil and gas properties. Reduction of Royalty Interest in Oil and Gas Properties Reduction of Chevron royalty interest in one of CRCs oil and gas properties Period of extension of capital commitment in oil and gas properties, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Oil And Gas Capital Commitment Period Extension Extension period capital commitment Long-term Purchase Commitment, Amount Business Combination, Consideration Transferred [Abstract] Consideration: Payments to Acquire Businesses, Gross Cash Business Combination, Consideration Transferred, Equity Interests Issued and Issuable Common stock issued (2.85 million shares) Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract] Identifiable assets acquired: The amount of proved properties recognized as of the acquisition date. Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Proved Properties Proved properties Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment Other property and equipment Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory Materials and supplies Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets Recognized amounts of identifiable assets acquired Number of employees currently working in particular location. Number of Employees 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 expected Finite-Lived Intangible Asset, Acquired-in-Place Leases Amount allocated to in-place leases No definition available. Divestitures [Abstract] Divestitures Derivative Instruments and Hedging Activities Disclosures [Table] 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 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) Hedged amount for variable-rate indebtedness Derivative, Cap Interest Rate Interest rate to be in place to receive payment 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 Gain (Loss) on Interest Rate Derivative Instruments Not Designated as Hedging Instruments Gain on interest rate contracts Basic Earnings Per Share Basic EPS calculation Undistributed Earnings Allocated to Participating Securities Less: net income allocated to participating securities Net Income (Loss) Available to Common Stockholders, Basic Net income (loss) 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] Retirement Plan Type [Axis] Retirement Plan Type [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, Actuarial Gain (Loss) Recognized actuarial loss 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 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 Disaggregation of Revenue [Table] Disaggregation of Revenue [Line Items] Disaggregation of revenue Interest Income, Other Interest income New Accounting Pronouncements or Change in Accounting Principle [Table] New Accounting Pronouncements or Change in Accounting Principle [Line Items] Effective Income Tax Rate Reconciliation, Percent Effective tax rate (as a percent) 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 Counterparty Name [Axis] Repurchase Agreement Counterparty Name [Domain] Counterparty Name [Domain] Represents information pertaining to Chevron U.S.A., Inc. Chevron U.s.a. Inc. [Member] Chevron Represents Ares Management L.P. led investor group. Ares Management L. P. Investor Group [Member] Ares-led investor group 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 Business Acquisition [Axis] Business Acquisition Acquiree [Domain] Business Acquisition, Acquiree [Domain] Represents information pertaining to Elk Hills. Elk Hills [Member] Elk Hills 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 (Second Priority Lien) 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% Senior 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 Represents the senior notes payable that bear an interest rate of 6.00 percent and will mature in 2024 and second lien notes. Senior Lien And Senior Notes6 Percent Due2024 [Member] Second Lien Notes and 6% Senior Notes due 2024 Line Of Credit [Member] Credit Agreements Represents Benefit Street Partners (BSP). Benefit Street Partners [Member] BSP 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 Ownership [Axis] Ownership [Domain] Ownership [Domain] 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 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 Legal Entity [Axis] Entity [Domain] Entity [Domain] 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 Represents Macquarie Infrastructure and Real Assets Inc. (MIRA). Macquarie Infrastructure And Real Assets Inc [Member] MIRA Scenario Forecast [Member] Expected Subsequent Event Type [Axis] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Subsequent Event [Member] Subsequent Events Partners of joint ventures where the entity's partners carry all or substantially all of the exploration costs. Exploration Joint Ventures Partners [Member] Exploration joint ventures partners Represents the working, surface and mineral interests in the Elk Hills field. Working Surface And Mineral Interests In Elk Hills Field [Member] Working, surface and mineral interests in the Elk Hills field Represents other oil and gas property. Other Oil And Gas Property [Member] Other oil and gas property Category of Item Purchased [Axis] Long Term Purchase Commitment Category Of Item Purchased [Domain] Long-term Purchase Commitment, Category of Item Purchased [Domain] Capital Additions [Member] Capital commitment Property, Plant and Equipment, Type [Axis] Property Plant And Equipment Type [Domain] Property, Plant and Equipment, Type [Domain] Office Building [Member] Office building 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 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 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 in 2018 through 2020. Production Period2018 To2020 [Member] 2018 through 2020 Represents the entity's production in 2018 through 2021. Production Period2018 To2021 [Member] 2018 through 2021 Interest Rate Cap [Member] Interest rate contract Represents one month LIBOR. One Month Libor [Member] One month LIBOR 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 Interest Rate Contract [Member] Interest Rate Contracts Other Assets [Member] Other assets Products and Services [Axis] Products And Services [Domain] Products and Services [Domain] Oil And Condensate [Member] Oil Public Utilities Inventory Propane [Member] NGLs Natural Gas Production [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, trading and other Restatement [Axis] Restatement [Domain] Restatement [Domain] Scenario Previously Reported [Member] Previous U.S. GAAP Restatement Adjustment [Member] Change Consolidated Entities [Axis] Consolidated Entities [Domain] Consolidated Entities [Domain] 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