Document and Entity Information Statement [Table] Statement [Line Items] Statement Entity Registrant Name Entity Central Index Key Document Type Document Period End Date Amendment Flag Current Fiscal Year End Date Entity Well-known Seasoned Issuer Entity Voluntary Filers Entity Current Reporting Status Entity Filer Category Entity Public Float Entity Common Stock, Shares Outstanding Document Fiscal Year Focus Document Fiscal Period Focus CONSOLIDATED AND COMBINED BALANCE SHEETS Assets [Abstract] Assets Assets, Current [Abstract] CURRENT ASSETS Cash and Cash Equivalents, at Carrying Value Cash and cash equivalents - end of year Cash and cash equivalents - beginning of year Cash and cash equivalents Accounts Receivable, Net, Current Trade receivables, net Inventory, Net Inventories Total Other current assets Other current assets Assets, Current 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 OTHER ASSETS OTHER ASSETS Assets TOTAL ASSETS Liabilities and Equity [Abstract] Liabilities and Stockholders' Equity Liabilities, Current [Abstract] CURRENT LIABILITIES Accounts Payable, Current Accounts payable Accrued Liabilities, Current Accrued liabilities Liabilities, Current Total current liabilities Long-term Debt, Excluding Current Maturities LONG-TERM DEBT Deferred Tax Liabilities, Net, Noncurrent DEFERRED INCOME TAXES Other Liabilities, Noncurrent OTHER LONG-TERM LIABILITIES Commitments and Contingencies COMMITMENTS AND CONTINGENCIES Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract] EQUITY Preferred Stock, Value, Issued Preferred stock - no shares outstanding at December 31, 2014 or 2013 (200 million shares authorized at $0.01 par value) Common Stock, Value, Issued Common stock (2.0 billions shares authorized at $0.01 par value) Outstanding shares (2014 - 385,639,582 shares and 2013 - 0 shares) Additional Paid in Capital, Common Stock Additional paid-in capital Retained Earnings (Accumulated Deficit) Accumulated deficit In the combined balance sheet, net parent company investment represents the parent company's historical investment in the company, the company's net earnings after taxes, and the net effect of transactions with, and allocations from the parent company. Net Parent Company Investment Net parent company investment Accumulated Other Comprehensive Income (Loss), Net of Tax Accumulated other comprehensive income (loss) Accumulated other comprehensive income (loss) Stockholders' Equity Attributable to Parent Total Equity / Net Investment Liabilities and Equity TOTAL LIABILITIES AND EQUITY Preferred Stock, Shares Outstanding Preferred stock, outstanding shares Preferred Stock, Shares Authorized Preferred stock, authorized shares Preferred Stock, Par or Stated Value Per Share Preferred stock, par value (in dollars per share) 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, Issued Common stock shares issued Consolidated and Combined Statements of Operations Revenues [Abstract] REVENUES Revenue from Related Parties Oil and natural gas sales to related parties Aggregate revenue during the period from the sale of goods to third parties in the normal course of business. Revenue from Sales to Third Parties Oil and natural gas sales to third parties Other income Other revenue Revenues TOTAL REVENUES Costs and Other Deductions [Abstract] COSTS AND OTHER DEDUCTIONS The costs incurred during the period to operate and maintain wells and related equipment and facilities. Production Costs Excluding Depreciation Production costs Operating Expenses Selling, general and administrative expenses Depreciation, Depletion and Amortization Depreciation, depletion and amortization Asset Impairment Charges Asset impairments Taxes, Miscellaneous Taxes other than on income Exploration Expense Exploration expense Pre-tax interest expense Interest and debt expense, net Pre-tax interest expense Other Expenses Other expenses Total costs of sales, operating expenses, and nonoperating expenses for the period. Costs and Other Deductions TOTAL COSTS AND OTHER DEDUCTIONS INCOME BEFORE INCOME TAXES INCOME / (LOSS) BEFORE INCOME TAXES Income (loss) before income taxes Income Tax Expense (Benefit) Income tax (expense) / benefit Total tax expense (benefit) Net income Net income / (loss) NET INCOME / (LOSS) EARNINGS PER SHARE Net income / (loss) per share of common stock 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) Consolidated and Combined Statements of Comprehensive Income Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract] Other comprehensive income (loss) items: Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax Unrealized (losses) gains on derivatives Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Unamortized Gain (Loss) Arising During Period, Net of Tax Pension and postretirement (losses) gains Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Net of Tax Reclassification to income of realized losses (gains) on derivatives Other Comprehensive Income (Loss), Net of Tax Other comprehensive income (loss), net of tax Other comprehensive income, net of tax Comprehensive Income (Loss), Net of Tax, Attributable to Parent Comprehensive income / (loss) Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Tax Unrealized (losses) gains on derivatives, tax Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Unamortized Gain (Loss) Arising During Period, Tax Pension and postretirement (losses) gains, tax Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Tax Reclassification to income of realized losses (gains) on derivatives, tax Consolidated and Combined Statements of Equity Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Parent [Member] Net Parent Company Investment Common Stock [Member] Common Stock Additional Paid In Capital [Member] Additional Paid-in Capital Retained Earnings [Member] Accumulated Deficit Accumulated Other Comprehensive Income [Member] Accumulated Other Comprehensive Income (Loss) Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (decrease) in Equity Common stock issuances Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Balance Balance Net contributions from or distributions to Occidental. Net contributions from or (distributions to) Occidental This element represents the dividends paid to the former parent company in conjunction with a Spin-off. Dividends Paid To Former Parent Company Dividend to Occidental Issuance of common stock at spin-off. Issuance of common stock at spin-off Represents the value of reclassification of parent company investments to additional paid in capital during the period. Reclassification Of Parent Company Investment To Additional Paid In Capital Reclassification of net parent company investment to additional paid-in capital The amount of distributions to former parent. Distributions To Former Parent Distributions to Occidental The amount of non-cash contributions received from former parent in conjunction with the Spin-off. Non Cash Contribution From Former Parent Non-cash contribution from Occidental 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: The pre-tax charge against earnings resulting from the write down of long lived assets due to the difference between the carrying value and lower fair value. Pretax Asset Impairment Asset impairments Deferred Income Tax Expense (Benefit) Deferred income tax expense / (benefit) Deferred Total tax expense (benefit) Deferred income tax benefit Other Noncash Expense Other noncash charges to income Exploration Abandonment and Impairment Expense Dry hole expenses Increase (Decrease) in Operating Capital [Abstract] Changes in operating assets and liabilities. net Increase (Decrease) in Receivables (Increase) decrease in trade receivables, net Increase (Decrease) in Inventories (Increase) decrease in inventories Increase (Decrease) in Other Current Assets (Increase) decrease in other current assets The increase (decrease) during the reporting period in the amounts payable to vendors for goods and services received and the amount of other current liabilities. Increase Decrease In Accounts Payable And Other Current Liabilities Increase (decrease) in accounts payable and other current liabilities Net Cash Provided by (Used in) 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 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 by investing activities Net Cash Provided by (Used in) Financing Activities [Abstract] CASH FLOW FROM FINANCING ACTIVITIES (Distributions to) contributions from Occidental, net (Distributions to) contributions from Occidental, net This element represents disclosure of the total aggregate dividends paid to the entity by consolidated subsidiaries, by unconsolidated subsidiaries, and by 50% or less owned persons accounted for using the equity method. Dividend to Occidental Dividends to Occidental Proceeds from Issuance of Long-term Debt Issuance of senior notes The cash inflow from a borrowing having initial term of repayment within one year or the normal operating cycle, if longer. Proceeds From Long Term Debt Issuance of term loan Proceeds from Lines of Credit Proceeds from revolving credit facility Repayments of Lines of Credit Repayments of revolving credit facility Payments of Debt Issuance Costs Debt issuance costs Net Cash Provided by (Used in) Financing Activities Net cash (used) provided by financing activities Cash and Cash Equivalents, Period Increase (Decrease) Increase in cash and cash equivalents THE SPIN-OFF AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES THE SPIN-OFF AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES The entire disclosure for spinoff and significant accounting policies. Spinoff And Summary Of Significant Accounting Policies Text Block THE SPIN-OFF AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES ACCOUNTING AND DISCLOSURE CHANGES New Accounting Pronouncements and Changes in Accounting Principles [Text Block] ACCOUNTING AND DISCLOSURE CHANGES No definition available. ACQUISITIONS Description of significant business acquisitions (or series of individually immaterial business combinations or asset acquisitions) planned, initiated, or completed during the period, including background, timing, and allocation of acquisition costs. Asset Acquisitions Text Block ACQUISITIONS INVENTORIES Inventory Disclosure [Text Block] INVENTORIES DEBT Long-term Debt [Text Block] DEBT LEASE COMMITMENTS Leases of Lessee Disclosure [Text Block] LEASE COMMITMENTS 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 FAIR VALUE MEASUREMENTS Fair Value Disclosures [Text Block] FAIR VALUE MEASUREMENTS INCOME TAXES Income Tax Disclosure [Text Block] INCOME TAXES STOCK COMPENSATION Disclosure of Compensation Related Costs, Share-based Payments [Text Block] STOCK COMPENSATION EQUITY Stockholders' Equity Note Disclosure [Text Block] EQUITY Earnings Per Share [Text Block] Earnings per share RETIREMENT AND POSTRETIREMENT BENEFIT PLANS Pension and Other Postretirement Benefits Disclosure [Text Block] RETIREMENT AND POSTRETIREMENT BENEFIT PLANS RELATED-PARTY TRANSACTIONS RELATED-PARTY TRANSACTIONS. RELATED-PARTY TRANSACTIONS Basis of Presentation Basis of Presentation Use of Estimates, Policy [Policy Text Block] Risks and Uncertainties Revenue Recognition, Policy [Policy Text Block] Revenue Recognition In the combined balance sheet, net parent company investment represents the parent company's historical investment in the company, the company's net earnings after taxes, and the net effect of transactions with, and allocations from the parent company. Net Parent Company Investment Policy Text Block Net Parent Company Investment Inventory, Policy [Policy Text Block] Inventories Property, Plant and Equipment, Policy [Policy Text Block] Property, Plant and Equipment Asset Retirement Obligations, Policy [Policy Text Block] Asset Retirement Obligations Derivatives, Policy [Policy Text Block] Derivative Instruments Compensation Related Costs, Policy [Policy Text Block] Stock-based Incentive Plans Earnings Per Share, Policy [Policy Text Block] Earnings Per Share Disclosure of accounting policy for retirement and postretirement benefit plans. Retirement And Postretirement Benefit Plans Policy Text Block Retirement and Postretirement Benefit Plans Fair Value Measurement, Policy [Policy Text Block] Fair Value Measurements Disclosure of accounting policy for other current assets. Other Current Assets Policy Text Block Other current assets Disclosure of accounting policy for accrued liabilities. Accrued Liabilities Policy Text Block Accrued liabilities Disclosure of accounting policy for cash and cash equivalents with respect to supplemental cash flow information. Supplemental Cash Flow Information Policy Text Block Supplemental Cash Flow Information Major Customers, Policy [Policy Text Block] Major Customers Income Tax, Policy [Policy Text Block] Income taxes Capitalized Exploratory Well Costs, Roll Forward [Table Text Block] Summary of the activity of capitalized exploratory well costs Schedule of Change in Asset Retirement Obligation [Table Text Block] Summary of the activity of the asset retirement obligation Schedule of Inventory, Current [Table Text Block] Inventories Schedule of Long-term Debt Instruments [Table Text Block] Debt Schedule of Maturities of Long-term Debt [Table Text Block] Principal maturities of long-term debt outstanding Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block] Future net minimum lease payments for noncancelable operating leases Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Assets accounted for at fair value on a recurring basis Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] Provision (benefit) for federal, state and local income taxes Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] Reconciliation of the United States federal statutory income tax rate to our effective tax rate is stated as a percentage of pre-tax income or loss Schedule of Deferred Tax Assets and Liabilities [Table Text Block] Tax effects of temporary differences resulting in deferred income taxes Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Employee awards STOCK-BASED INCENTIVE PLANS Schedule of Share-based Compensation, Restricted Stock Units Award Activity [Table Text Block] Summary of changes in unvested cash and stock-settled RSUs Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block] Summary of stock option activity Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] Schedule of grant date assumptions used in the Black-Scholes valuation for stock options Disclosure of the roll forward of activities in common stock during the period presented including common stock issuances and options exercised and other activities. Schedule of Common Stock Issuances [Table Text Block] Summary of common stock issuances Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Components of accumulated other comprehensive income (loss) Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Calculation of basic and diluted EPS Schedule of Amounts Recognized in Balance Sheet [Table Text Block] Components of amounts recognized in the consolidated balance sheets Schedule of Amounts Recognized in Other Comprehensive Income (Loss) [Table Text Block] After-tax balances included in AOCI Disclosure of the change in the benefit obligation and fair value of plan assets of pension plans and/or other employee benefit plans from the beginning to the end of the period, showing separately, if applicable, the effects of the following: service cost, interest cost, contributions by plan participants, actuarial gains and losses, foreign currency exchange rate changes, benefits paid, plan amendments, business combinations, divestitures, curtailments, settlements, and special and contractual termination benefits. The disclosure may also include the funded status of the plan and disclosure of the accumulated benefit obligation. Schedule of Changes in Benefit Obligations and Plan Assets [Table Text Block] Funding status of plans Tabular disclosure of projected benefit obligation, accumulated benefit obligation and fair value of plan assets for defined benefit pension plans with an accumulated benefit obligation in excess of plan assets and plan assets in excess of the accumulated benefit obligation. Schedule Of Accumulated Benefit Obligation Projected Benefit Obligation And Fair Value Of Plan Assets For Defined Benefit Pension Plans Table Text Block Schedule of accumulated benefit obligation, projected benefit obligation and fair value of plan assets for defined benefit pension plans with an accumulated benefit obligation in excess of plan assets and plan assets in excess of the accumulated benefit obligation Schedule of Net Benefit Costs [Table Text Block] Components of the net periodic benefit cost