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Deferred income taxes Gain (loss) on disposition of assets, net Discontinued operations Adjustment Income Loss From Discontinued Operations Net Of Tax Aggregate non-cash (income) loss and investing and financing cash flows from a disposal group. Interest expense Paid-in-Kind Interest Derivative related activity Unrealized Gain Loss On Derivative Instruments Aggregate net unrealized gain (loss) on commodity and interest rate derivative instruments. Amortization of stock-based compensation Amortization Stock Based Compensation Non-cash amortization of unvested stock-based compensation during the operating period. Amortization of deferred revenue Deferred Revenue Amortization Deferred revenue recognized but not to be included in current operations cash flows. Other noncash items Other Noncash Income (Expense) Change in operating assets and liabilities, net of effects from acquisitions and dispositions: Increase (Decrease) in Operating Capital [Abstract] Accounts receivable, net Increase (Decrease) in Accounts Receivable Income taxes receivable Increase (Decrease) in Income Taxes Receivable Inventories Increase (Decrease) in Inventories Prepaid expenses Increase (Decrease) in Prepaid Expense Other current assets Increase (Decrease) in Other Current Assets Accounts payable Increase (Decrease) in Accounts Payable Interest payable Increase (Decrease) in Interest Payable, Net Income taxes payable Increase (Decrease) in Income Taxes Payable Other current liabilities Increase (Decrease) in Other Current Liabilities Net cash provided by operating activities Net Cash Provided by (Used in) Operating Activities Cash flows from investing activities: Net Cash Provided by (Used in) Investing Activities [Abstract] Proceeds from disposition of assets, net of cash sold Proceeds from Sale of Productive Assets Payments for acquisition, net of cash acquired Payments to Acquire Businesses, Net of Cash Acquired Investment in unconsolidated subsidiary Payments to Acquire Interest in Subsidiaries and Affiliates Additions to oil and gas properties Payments to Acquire Oil and Gas Property Additions to other assets and other property and equipment, net Payments to Acquire Other Productive Assets Net cash used in investing activities Net Cash Provided by (Used in) Investing Activities Cash flows from financing activities: Net Cash Provided by (Used in) Financing Activities [Abstract] Borrowings under long-term debt Proceeds from Issuance of Long-term Debt Principal payments on long-term debt Repayments of Long-term Debt Distributions to noncontrolling interests Payments of Distributions to Affiliates Payments of other liabilities Borrowings Payments of Other Liabilities Borrowings and payments of other liabilities Exercise of long-term incentive plan stock options Proceeds from Stock Options Exercised Purchases of treasury stock Payments for Repurchase of Common Stock Excess tax benefits from share-based payment arrangements Excess Tax Benefit (Tax Deficiency) from Share-based Compensation, Financing Activities Payment of financing fees Payments of Financing Costs Dividends paid Payments of Dividends Net cash provided by (used in) financing activities Net Cash Provided by (Used in) Financing Activities Net increase (decrease) in cash and cash equivalents Cash and Cash Equivalents, Period Increase (Decrease) Cash and cash equivalents, beginning of period Cash and Cash Equivalents, at Carrying Value Cash and cash equivalents, end of period Fair Value, Assets Measured on Recurring Basis [Table] Fair Value Measurements, Recurring and Nonrecurring [Table] Trading Activity [Axis] Trading Activity [Axis] Trading Activity, by Type [Domain] Trading Activity, by Type [Domain] Trading Securities [Member] Trading Assets, Excluding Debt and Equity Securities [Member] Commodity Derivatives [Member] Commodity [Member] Deferred Compensation Plan Assets [Member] Deferred Compensation Plan Assets [Member] Deferred Compensation Plan Assets [Member] Fair Value, Assets Measured on Recurring Basis, Disclosure Items [Axis] Fair Value, Hierarchy [Axis] Fair Value, Assets Measured on Recurring Basis, Disclosure Items [Domain] Fair Value, Measurements, Fair Value Hierarchy [Domain] Quoted Prices In Active Markets For Identical Assets (Level 1) [Member] Fair Value, Inputs, Level 1 [Member] Significant Other Observable Inputs (Level 2) [Member] Fair Value, Inputs, Level 2 [Member] Fair Value, Inputs, Level 3 [Member] Fair Value, Inputs, Level 3 [Member] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Assets, (Fair Value, Total) Fair Value Assets Measured On Recurring Basis Assets Total Fair Value Assets Measured On Recurring Basis Assets Total Liabilities, (Fair Value, Total) Fair Value Liabilities Measured On Recurring Basis Liabilities Total Fair Value Liabilities Measured On Recurring Basis Liabilities Total Recurring Measurements, (Fair Value, Total) Recurring Measurements, (Fair Value, Total) Recurring Measurements, (Fair Value, Total). 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Loss on extinguishment of debt Gains (Losses) on Extinguishment of Debt Total other expense Debt Disclosure [Abstract] Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Covenant [Axis] Covenant [Axis] Covenant [Axis] Covenant [Domain] Covenant [Domain] Covenant [Domain] Maximum Leverage Ratio [Member] Maximum Leverage Ratio [Member] Maximum Leverage Ratio [Member] Net Present Value of Cash Flow to Total Debt [Member] Net Present Value of Cash Flow to Total Debt [Member] Net Present Value of Cash Flow to Total Debt [Member] Debt Conversion Description [Axis] Debt Conversion Description [Axis] Debt Conversion, Name [Domain] Debt Conversion, Name [Domain] Non-Cash [Member] Noncash [Member] Noncash Debt Instrument [Axis] Debt Instrument [Axis] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Pioneer Southwest Credit Facility [Member] Pioneer Southwest Credit Facility [Member] Pioneer Southwest Credit Facility [Member] If Converted [Member] If Converted [Member] If Converted Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] 3.95 percent Senior Notes Due 2022 [Member] Three Point Nine Five Percent Senior Notes Due 2022 [Member] 3.95 percent Senior Notes Due 2022 [Member] 2.875% Convertible Senior Notes Due 2038 [Member] Two Point Eight Seven Five Percent Senior Convertible Notes Due Two Thousand Thirty Eight [Member] Two Point Eight Seven Five Percent Senior Convertible Notes Due Two Thousand Thirty Eight [Member] PXD Credit Facility [Member] Pxd Credit Facility [Member] PXD Credit Facility Debt Instrument [Line Items] Debt Instrument [Line Items] Outstanding borrowing Line of Credit Facility, Amount Outstanding Undrawn letters of credit Undrawn Letters Of Credit Undrawn Letters Of Credit Unused borrowing capacity Line of Credit Facility, Remaining Borrowing Capacity Undrawn Letters Of Credit Cancelled Undrawn Letters Of Credit Cancelled Undrawn Letters Of Credit Cancelled Debt Instrument Covenant, Maximum Leverage Ratio Debt Instrument Covenant, Maximum Leverage Ratio Debt Instrument Covenant, Maximum Leverage Ratio Debt Instrument Covenant, Net Present Value of Cash Flow to Total Debt Ratio Debt Instrument Covenant, Net Present Value of Cash Flow to Total Debt Ratio Debt Instrument Covenant, Net Present Value of Cash Flow to Total Debt Ratio Aggregate loan commitments Line of Credit Facility, Maximum Borrowing Capacity Senior Notes Senior Notes Convertible Debt Convertible Debt Senior notes, interest rate, percentage Debt Instrument, Interest Rate, Stated Percentage Value of shares received for conversion of debt Debt Conversion, Converted Instrument, Amount Shares issued for conversion of debt Debt Conversion, Converted Instrument, Shares Issued Cash Paid To Conversion Of Convertible Senior Notes Cash Paid To Conversion Of Convertible Senior Notes Cash Paid To Conversion Of Convertible Senior Notes Cash received from note holders Cash Received From Conversion Of Convertible Senior Note Cash Received From Conversion Of Convertible Senior Note Senior Note Debt Instrument Maturity Date Senior Note Debt Instrument Maturity Date Senior Note Debt Instrument Maturity Date Debt Instrument, Unamortized Discount Debt Instrument, Unamortized Discount Proceeds from Issuance of Long-term Debt Impairment Impairment of Long-Lived Assets Held and Used by Asset [Text Block] Impairment of Long-Lived Assets Held and Used by Asset [Text Block] 2015 Gas Derivatives [Member] [Member] 2015 Gas Derivatives [Member] [Member] 2015 Gas Derivatives [Member] [Member] 2014 Gas Derivatives [Member] 2014 Gas Derivatives [Member] 2014 Gas Derivatives [Member] 2012 Swap Contracts [Member] Two Thousand Twelve Swap Contracts [Member] Two Thousand Twelve Swap Contracts [Member] 2014 - Collar Contracts With Short Puts [Member] Two Thousand Fourteen Collar Contracts With Short Puts [Member] Two Thousand Fourteen Collar Contracts With Short 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Derivative Instruments Loss From Discontinued Interest Rate Hedges In Aoci Derivative Instruments Loss From Discontinued Interest Rate Hedges In Accumulated Other Comprehensive Income DerivativeInstrumentsLossFromDiscontinuedInterestRateHedgesInAoci Average Daily Gas Production Derivatives Volume (MMBTU) Average Daily Gas Production Derivatives Volume Average Daily Gas Production Derivatives Volume Average Daily Gas Production Derivatives Price Per MMBtu Average Daily Gas Production Derivatives Price Per MMBtu Average Daily Gas Production Derivatives Price Per MMBtu Long-Term Debt Long-term Debt [Text Block] Presentation Consolidation, Policy [Policy Text Block] Derivatives And Hedging Derivatives, Policy [Policy Text Block] Impairment Of Long-Lived Assets Impairment or Disposal of Long-Lived Assets, Policy [Policy Text Block] Exploratory Costs [Abstract] Exploratory Costs [Abstract] Beginning capitalized exploratory costs Capitalized Exploratory Well Costs Additions to exploratory costs pending the determination of proved reserves Capitalized Exploratory Well Cost, Additions Pending Determination of Proved Reserves Reclassification due to determination of proved reserves Reclassification to Well, Facilities, and Equipment Based on Determination of Proved Reserves Exploratory well costs charged to exploration expense Capitalized Exploratory Well Cost, Charged to Expense Ending capitalized exploratory costs Income Taxes Income Tax Disclosure [Text Block] Subsequent Events [Abstract] Subsequent Events Subsequent Events [Text Block] Pioneer Southwest Ltip [Member] Pioneer Southwest Ltip [Member] Pioneer Southwest Ltip [Member] Pioneer Southwest's credit-adjusted risk-free rate curve basis Derivative, Description of Variable Rate Basis Pioneer Southwest's credit-adjusted risk-free rate curve, spread on variable rate Derivative, Basis Spread on Variable Rate Discontinued Operations Narrative [Abstract] Discontinued Operations Narrative [Abstract] Income Statement, 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Income From Discontinued Operations The aggregate amount of other income amounts resulting from ancillary business-related activities (that is, excluding major activities considered part of the normal operations of the business) also known as other nonoperating income recognized for the period from discontinued operations. Such amounts may include: (a) dividends, (b) interest on securities, (c) profits on securities (net of losses), and (d) miscellaneous other income items. Statement of Financial Position [Abstract] Trade, allowance for doubtful accounts Allowance for Doubtful Accounts Receivable, Current Other, allowance for doubtful accounts Allowance for Doubtful Accounts Receivable, Noncurrent Common stock, par value Common Stock, Par or Stated Value Per Share Common stock, shares authorized Common Stock, Shares Authorized Common stock, shares issued Common Stock, Shares, Issued Treasury stock, shares Treasury Stock, Shares Document And Entity Information [Abstract] Document and Entity Information [Abstract] Document Type Document Type Amendment Flag Amendment Flag Document Period End Date Document Period End Date Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Trading Symbol Trading Symbol Entity Registrant Name Entity Registrant Name Entity Central Index Key Entity Central Index Key Current Fiscal Year End Date Current Fiscal Year End Date Entity Filer Category Entity Filer Category Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Schedule of Subsidiary or Equity Method Investee [Table] Schedule of Subsidiary or Equity Method Investee [Table] Subsidiary or Equity Method Investee [Line Items] Subsidiary or Equity Method Investee [Line Items] Deferred tax provision attributable to 2008 Pioneer Southwest initial public offering Subsidiary or Equity Method Investee, Deferred Income Tax Provision on Gain (Loss) Recognized, Amount Schedule of Earnings Per Share, Basic and Diluted, by Common Class, Including Two Class Method [Table] Schedule of Earnings Per Share, Basic and Diluted, by Common Class, Including Two Class Method [Table] Schedule of Earnings Per Share, Basic and Diluted, by Common Class, Including Two Class Method [Table] Statement, Operating Activities Segment [Axis] Statement, Operating Activities Segment [Axis] Segment, Operating Activities [Domain] Segment, Operating Activities [Domain] Continuing Operations [Member] Segment, Continuing Operations [Member] Discontinued Operations [Member] Segment, Discontinued Operations [Member] Statement Operating Activities Segment [Line Items] Statement Operating Activities Segment [Line Items] Statement Operating Activities Segment [Line Items] Income (loss) from continuing operations attributable to parent Income (loss) from discontinued operations, net of tax, attributable to parent Income (loss) as reported Participating basic earnings Participating Securities, Distributed and Undistributed Earnings Basic income attributable to common stockholders Net Income (Loss) Available to Common Stockholders, Basic Reallocation of participating earnings Dilutive Securities, Effect on Basic Earnings Per Share Diluted income attributable to common stockholders Net Income (Loss) Available to Common Stockholders, Diluted Subsequent Event [Table] Subsequent Event [Table] Subsequent Event Type [Axis] Subsequent Event Type [Axis] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Subsequent Event [Member] Subsequent Event [Member] Distributions Made to Member or Limited Partner by Distribution Type [Axis] Distributions Made to Member or Limited Partner by Distribution Type [Axis] Distribution Type [Domain] Distribution Type [Domain] Cash Distribution [Member] Cash Distribution [Member] Subsequent Event [Line Items] Subsequent Event [Line Items] Distribution Made to Member or Limited Partner, Distributions Declared, Per Unit Distribution Made to Member or Limited Partner, Distributions Declared, Per Unit Distribution Made to Member or Limited Partner, Cash Distributions Declared Distribution Made to Member or Limited Partner, Cash Distributions Declared Equity Components [Axis] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Common Stock [Member] Common Stock [Member] Additional Paid-In Capital [Member] Additional Paid-in Capital [Member] Treasury Stock [Member] Treasury Stock [Member] Retained Earnings [Member] Retained Earnings [Member] Accumulated Other Comprehensive Loss [Member] Accumulated Other Comprehensive Income (Loss) [Member] Noncontrolling Interests [Member] Noncontrolling Interest [Member] Balance Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Balance, shares Shares, Outstanding Dividends declared ($0.04 per share) Dividends, Cash Exercise of long-term incentive plan stock options Stock Issued During Period, Value, Stock Options Exercised Exercise of long-term incentive plan stock options, shares Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Treasury stock purchases Treasury Stock, Value, Acquired, Cost Method Treasury stock purchases, shares Treasury Stock, Shares, Acquired Conversion of 2.875% senior convertible notes Stock Issued During Period, Value, Conversion of Convertible Securities Tax benefit related to stock-based compensation Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation Compensation costs: Share-based Compensation [Abstract] Vested compensation awards, net Stock Issued Or Vested During Period Value Stock Awards Par value of share-based payments that vest or lapse during the period. Vested compensation awards, net, shares Stock Issued Or Vested During Period Shares Stock Awards Number of common stock issued as a result of granting or vesting of employee stock awards (including income tax benefits), and the shares of treasury stock purchases related to withholding taxes. Compensation costs included in net income Share based compensation award compensation cost Share based compensation award compensation cost Cash distributions to noncontrolling interests Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders Other comprehensive activity: Other Comprehensive Income (Loss), Net of Tax [Abstract] Deferred hedging activity, net of tax: Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax [Abstract] Net hedge losses included in continuing operations Other Comprehensive Income (Loss), Reclassification Adjustment on Derivatives Included in Net Income, Net of Tax Balance Balance, shares Statement of Other Comprehensive Income [Abstract] Net income (loss) Net hedge (gains) losses included in continuing operations Other Comprehensive Income (Loss), Reclassification Adjustment on Derivatives Included in Net Income, before Tax Income tax (benefit) provision Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Tax Other comprehensive activity Other Comprehensive Income (Loss), Net of Tax Comprehensive income (loss) Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Comprehensive (income) loss attributable to the noncontrolling interests Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest Comprehensive income (loss) attributable to common stockholders Comprehensive Income (Loss), Net of Tax, Attributable to Parent Components of discontinued operations Schedule of Disposal Groups, Including Discontinued Operations, Income Statement, Balance Sheet and Additional Disclosures [Table Text Block] Defined Contribution Pension and Other Postretirement Plans Disclosure [Abstract] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Plan Name [Axis] Plan Name [Axis] Plan Name [Domain] Plan Name [Domain] Award Type [Axis] Award Type [Axis] Award Type [Domain] Award Type [Domain] Class of Stock [Axis] Class of Stock [Axis] Class of Stock [Domain] Class of Stock [Domain] Restricted Stock [Member] Restricted Stock Equity Awards Memeber [Member] Restricted Stock Equity Awards Memeber [Member] Pioneer Southwest Ltip Restricted Units [Member] Pioneer Southwest Ltip Restricted Units [Member] Pioneer Southwest LTIP Restricted Units [Member] Performance Units [Member] Performance Units [Member] Performance Units [Member] Restricted Stock Liability Awards [Member] Restricted Stock Liability Awards [Member] Restricted Stock Liability Awards [Member] Pioneer Southwest Ltip Phantom Units [Member] Pioneer Southwest Ltip Phantom Units [Member] Pioneer Southwest LTIP Phantom Units [Member] Range [Axis] Range [Axis] Range [Domain] Range [Domain] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number Allocated Share-based Compensation Expense Allocated Share-based Compensation Expense Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized Share Based Compensation Arrangement By Share Based Payment Award Liability Share Based Compensation Arrangement By Share Based Payment Award Liability Share Based Compensation Arrangement By Share Based Payment Award Liability Amount Of Liabilities Attributable To Liability Awards Included In Accounts Payable Amount Of Liabilities Attributable To Liability Awards Included In Accounts Payable Amount Of Liabilities Attributable To Liability Awards Included In Accounts Payable Restricted Stock Awards Unvested Shares At Balance Sheet Date Restricted Stock Awards Unvested Shares At Balance Sheet Date The number of unvested restricted stock shares not reflected in balance sheet Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period Postretirement benefit obligation revaluation Defined Benefit Plan, Benefit Obligation Schedule of accumulated postretirement benefit obligations Schedule of Changes in Accumulated Postemployment Benefit Obligations [Table Text Block] Exploratory Costs Oil and Gas Exploration and Production Industries Disclosures [Text Block] Interest And Other Income Other Income and Other Expense Disclosure [Text Block] Derivative Financial Instruments Derivative Instruments and Hedging Activities Disclosure [Text Block] Schedule of oil derivative contracts volume and weighted average price Schedule of Oil Derivative Contracts volume and weighted average price [text block] Schedule of Oil Derivative Contracts Volume and Weighted Average Price [Text Block] Schedule of gas volume and weighted average prices Schedule Of Gas Volume And Weighted Average Prices [Table Text Block] Schedule Of Gas Volume And Weighted Average Prices [Table Text Block] Schedule of marketing and basis transfer derivative contracts Schedule Of Marketing And Basis Transfer Derivative Contracts TextBlock Schedule Of Marketing And Basis Transfer Derivative Contracts TextBlock. Schedule of derivative instruments Schedule of Derivative Instruments [Table Text Block] Schedule of derivative obligations under terminated hedge arrangements Schedule of Derivative Obligations Under Terminated Hedge Arrangements [Text Block] Schedule of Derivative Obligations Under Terminated Hedge Arrangements [Text Block] Schedule of derivative assets and liabilities by counterparty Schedule of Derivative Assets and Liabilities by Counterparty [Table Text Block] Schedule of Derivative Assets and Liabilities by Counterparty [Table Text Block] Derivative Assets and Liabilities by Counterparty [Abstract] Derivative Assets and Liabilities by Counterparty [Abstract] Schedule of Derivative Assets and Liabilities by Counterparty [Table] Schedule of Derivative Assets and Liabilities by Counterparty [Table] Schedule of Derivative Assets and Liabilities by Counterparty [Table] Counterparty Name [Axis] Counterparty Name [Axis] Counterparty Name [Domain] Counterparty Name [Domain] JP Morgan Chase Counterparty [Member] JP Morgan Chase Counterparty [Member] JP Morgan Chase Counterparty [Member] Citibank, N.A. Counterparty [Member] Citibank, N.A. Counterparty [Member] Citibank, N.A. Counterparty [Member] Barclays Capital Counterparty [Member] Barclays Capital Counterparty [Member] Barclays Capital Counterparty [Member] BMO Financial Group [Member] BMO Financial Group [Member] BMO Financial Group [Member] BNP Paribas [Member] BNP Paribas [Member] BNP Paribas [Member] J. Aron & Company [Member] J. Aron & Company [Member] J. Aron & Company [Member] Wells Fargo Bank, N.A. Counterparty [Member] Wells Fargo Bank, N.A. Counterparty [Member] Wells Fargo Bank, N.A. Counterparty [Member] Credit Suisse [Member] Credit Suisse [Member] Credit Suisse [Member] Toronto Dominion Counterparty [Member] Toronto Dominion Counterparty [Member] Toronto Dominion Counterparty Societe Generale [Member] Credit Agricole [Member] Credit Agricole [Member] Merrill Lynch [Member] Societe Generale [Member] Societe Generale [Member] Merrill Lynch [Member] Merrill Lynch [Member] Merrill Lynch [Member] Morgan Stanley [Member] Morgan Stanley [Member] Morgan Stanley [Member] Den Norske Bank [Member] Den Norske Bank [Member] Den Norske Bank [Member] BP Corporation North America [Member] BP Corporation North America [Member] BP Corporation North America [Member] Deutsche Bank [Member] Deutsche Bank [Member] Deutsche Bank [Member] Vitol [Member] Vitol [Member] Vitol [Member] Macquarie Bank [Member] Macquarie Bank [Member] Macquarie Bank [Member] Royal Bank of Canada [Member] Royal Bank of Canada [Member] Royal Bank of Canada [Member] UBS [Member] UBS [Member] UBS [Member] Schedule of Derivative Assets and Liabilities by Counterparty [Line Items] Schedule of Derivative Assets and Liabilities by Counterparty [Line Items] Schedule of Derivative Assets and Liabilities by Counterparty [Line Items] Derivative Assets Derivative Assets Derivative Liabilities Derivative Liabilities Commitments and Contingencies Disclosure [Abstract] Commitments And Contingencies Commitments and Contingencies Disclosure [Text Block] Fair Value, by Balance Sheet Grouping, Disclosure Item Amounts [Axis] Fair Value, by Balance Sheet Grouping, Disclosure Item Amounts [Axis] Fair Value, Disclosure Item Amounts [Domain] Fair Value, Disclosure Item Amounts [Domain] Carrying Value [Member] Carrying Value [Member] Carrying Value [Member] Fair Value [Member] Fair Value [Member] Fair Value [Member] Long-term Debt Element Long-term Debt Business acquisition, cost of acquired entity, purchase price Business Acquisition, Cost of Acquired Entity, Purchase Price Business acquisition, purchase price allocation, assets acquired Business Acquisition, Purchase Price Allocation, Assets Acquired Business acquisition, purchase price allocation, property, plant and equipment Business Acquisition, Purchase Price Allocation, Property, Plant and Equipment Business acquisition, purchase price allocation, liabilities assumed Business Acquisition, Purchase Price Allocation, Liabilities Assumed Business acquisition, purchase price allocation, deferred taxes asset (liability), net, noncurrent Business Acquisition, Purchase Price Allocation, Deferred Taxes Asset (Liability), Net, Noncurrent Business combination, acquisition related costs Oil and gas Oil And Gas Revenue From Discontinued Operations Aggregate revenue during the period related to discontinued oil and gas business activities. Gain (loss) on disposition of assets, net Gains Losses On Sales Of Assets Discontinued Operations The net gain or loss from discontinued operations resulting from the sale, transfer, termination, or other disposition of assets during the period are included in gains (losses) on the disposition of assets in nonoperating income (expense) from discontinued operations. Total revenues and other income from discontinued operations Total Revenues And Other Income From Discontinued Operations Total revenues and income from equity affiliates and other income from discontinued operations. Oil and gas production Oil And Gas Production Expense From Discontinued Operations Discontinued operations costs incurred to operate and maintain an entities' wells and related equipment and facilities, including depreciation and applicable operating costs of support equipment and facilities and other costs of operating and maintaining those wells and related equipment and facilities. Depletion, depreciation and amortization Depreciation Depletion And Amortization From Discontinued Operations The aggregate expense recognized in the current period from discontinued operations that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets. Exploration and abandonments Exploration Abandonment And Impairment Expense From Discontinued Operations The discontinued operations adjustment to expense previously capitalized costs of drilling exploratory wells when proved reserves are not found or when the entity obtains information that raises substantial doubt about the economic or operational viability of the project. General and administrative General And Administrative Expense From Discontinued Operations The aggregate total of discontinued operations expenses of managing and administering the affairs of an entity, including affiliates of the reporting entity, which are not directly or indirectly associated with the manufacture, sale or creation of a product or product line. Accretion of discount on asset retirement obligations Asset Retirement Obligation Accretion Expense From Discontinued Operations Accretion expense related to asset retirement obligations from discontinued operations. Interest Interest expense discontinued operations Interest expense discontinued operations Other Other Nonoperating Expense From Discontinued Operations Any other expense items resulting from secondary business-related activities, excluding those considered part of the normal operations of the business that have not been previously categorized from discontinued operations. Total costs and expenses from discontinued operations Costs And Expenses From Discontinued Operations Total costs of sales and operating expenses for the period from discontinued operations. Income from discontinued operations before income taxes Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax Current tax provision Discontinued Operation Current Tax Effect Of Discontinued Operation Discontinued Operation Current Tax Effect Of Discontinued Operation Deferred tax provision Discontinued Operation Deferred Tax Effect Of Discontinued Operation Discontinued Operation Deferred Tax Effect Of Discontinued Operation Income from discontinued operations Capitalized exploratory well and project activity Capitalized Exploratory Well and Project Activity [Table Text Block] Capitalized Exploratory Well and Project Activity [Table Text Block] Beginning asset retirement obligations Asset Retirement Obligation Liabilities assumed in acquisitions Asset Retirement Obligation, Liabilities Incurred New wells placed on production Assets Retirement Obligations on New Assets Placed in Production Assets Retirement Obligations on New Assets Placed in Production Changes in estimates Asset Retirement Obligation, Revision of Estimate Disposition of wells Asset Retirement Obligations Written Off Through Disposition Of Wells Asset Retirement Obligations Written Off Through Disposition of Wells. Liabilities settled Asset Retirement Obligation, Liabilities Settled Accretion of discount from continuing operations Accretion of discount from integrated services Asset Retirement Obligation Accretion Expense Integrated Services Asset Retirement Obligation Accretion Expense related to Integrated Services Accretion of discount from discontinued operations Asset Retirement Obligation Accretion Expense From Discontinued Operations Included in Asset Retirement Obligation Balance At End of Period Asset Retirement Obligation Accretion Expense From Discontinued Operations Included in Asset Retirement Obligation Balance At End of Period Ending asset retirement obligations Asset retirement obligations, current portions Asset Retirement Obligation, Current 2012 - Collar Contracts With Short Puts [Member] Two Thousand Twelve Collar Contracts With Short Puts [Member] Two Thousand Twelve Collar Contracts With Short Puts [Member] 2013 - Collar Contracts With Short Puts [Member] Two Thousand Thirteen Collar Contracts With Short Puts [Member] Two Thousand Thirteen Collar Contracts With Short Puts [Member] 2015 Collar Contracts With Short Puts [Member] Two Thousand Fifteen Collar Contracts With Short Puts [Member] Two Thousand Fifteen Collar Contracts With Short Puts [Member] 2012 - Collar Contracts [Member] Two Thousand Twelve Collar Contracts [Member] Two Thousand Twelve Collar Contracts [Member] 2013 Collar Contracts [Member] Two Thousand Thirteen Collar Contracts [Member] Two Thousand Thirteen Collar Contracts [Member] 2014 Collar Contracts [Member] Two Thousand Fourteen Collar Contracts [Member] Two Thousand Fourteen Collar Contracts [Member] 2015 Collar Contracts [Member] Two Thousand Fifteen Collar Contracts [Member] Two Thousand Fifteen Collar Contracts [Member] 2013 Swap Contracts [Member] Two Thousand Thirteen Swap Contracts [Member] Two Thousand Thirteen Swap Contracts [Member] 2014 Swap Contracts [Member] Two Thousand Fourteen Swap Contracts [Member] Two Thousand Fourteen Swap Contracts [Member] 2015 Swap Contracts [Member] Two Thousand Fifteen Swap Contracts [Member] Two Thousand Fifteen Swap Contracts [Member] 2012 - Rollfactor Swap Contracts [Member] Two Thousand Twelve Rollfactor Swap Contracts [Member] Two Thousand Twelve Rollfactor Swap Contracts [Member] 2013 Rollfactor Swap Contracts [Member] Two Thousand Thirteen Rollfactor Swap Contracts [Member] Two Thousand Thirteen Rollfactor Swap Contracts [Member] 2014 Rollfactor Swap Contracts [Member] Two Thousand Fourteen Rollfactor Swap Contracts [Member] Two Thousand Fourteen Rollfactor Swap Contracts [Member] 2012 Basis Swap Contracts [Member] Two Thousand Twelve Basis Swap Contracts [Member] Two Thousand Twelve Basis Swap Contracts [Member] 2013 Basis Swap Contracts [Member] Two Thousand And Thirteen Index Basis Swap Contracts [Member] Two Thousand and Thirteen Idex Basis Swap Contracts 2014 Basis Swap Contracts [Member] Two Thousand Fourteen Basis Swap Contracts [Member] 2014 - Basis Swap Contracts 2015 Basis Swap Contracts [Member] Two Thousand Fifteen Basis Swap Contracts [Member] Two Thousand Fifteen Basis Swap Contracts [Member] Trading Activity, Gains and Losses, Net [Line Items] Trading Activity, Gains and Losses, Net [Line Items] Average Price per Bbl Income Statement Location [Axis] Income Statement Location [Axis] Income Statement and Other Comprehensive Income Location [Domain] Income Statement Location [Domain] Interest Expense [Member] Interest Expense [Member] Derivative Gains, Net [Member] Derivative Gains Losses [Member] Derivative gains (losses) [Member] Oil And Gas revenue [Member] Oil And Gas Revenue [Member] Oil and gas revenue Amount of Gain/(Loss) Reclassified from AOCI into Earnings Amount of Gain (Loss) Recognized in Earnings on Derivatives Loss on Derivative Instruments, Pretax ASSETS Assets [Abstract] Current assets: Assets, Current [Abstract] Cash and cash equivalents Accounts receivable: Accounts Receivable, Net, Current [Abstract] Trade, net of allowance for doubtful accounts of $706 and $806 as of June 30, 2022 and December 31, 2011, respectively Accounts Receivable, Net, Current Due from affiliates Due from Affiliate, Current Income taxes receivable Income Taxes Receivable, Current Inventories Inventory, Net Prepaid expenses Prepaid Expense, Current Deferred income taxes Deferred Tax Assets, Net of Valuation Allowance, Current Discontinued operations held for sale Assets of Disposal Group, Including Discontinued Operation, Current Other current assets: Other Assets, Current [Abstract] Other Assets, Current [Abstract] Derivatives Derivative Assets, Current Other Other Assets, Current Total current assets Assets, Current Property, plant and equipment, at cost: Property, Plant and Equipment, Net [Abstract] Oil and gas properties, using the successful efforts method of accounting: Oil and Gas Property, Successful Effort Method, Net [Abstract] Proved properties Proved Oil and Gas Property, Successful Effort Method Unproved properties Unproved Oil and Gas Property, Successful Effort Method Accumulated depletion, depreciation and amortization Oil and Gas Property, Successful Effort Method, Accumulated Depreciation, Depletion and Amortization Total property, plant and equipment Oil and Gas Property, Successful Effort Method, Net Deferred income taxes Deferred Tax Assets, Net of Valuation Allowance, Noncurrent Goodwill Goodwill Other property and equipment, net Property, Plant and Equipment, Other, Gross Other assets: Other Assets, Noncurrent [Abstract] Investment in unconsolidated affiliate Equity Method Investments Derivatives Derivative Assets, Noncurrent Other, net of allowance for doubtful accounts of $655 and $340 as of June 30, 2022 and December 31, 2011, respectively Other Assets, Noncurrent Assets, Total Assets LIABILITIES AND STOCKHOLDERS' EQUITY Liabilities and Equity [Abstract] Current liabilities: Liabilities, Current [Abstract] Accounts payable: Accounts Payable, Current [Abstract] Trade Accounts Payable, Trade, Current Due to affiliates Due to Affiliate, Current Interest payable Interest Payable, Current Income taxes payable Accrued Income Taxes, Current Deferred Tax Liabilities, Net, Current Deferred Tax Liabilities, Net, Current Discontinued operations held for sale Liabilities of Disposal Group, Including Discontinued Operation Other current liabilities: Other Liabilities, Current [Abstract] Derivatives Derivative Liabilities, Current Deferred revenue Deferred Revenue, Current Other Other Liabilities, Current Total current liabilities Liabilities, Current Long-term debt Derivatives Derivative Liabilities, Noncurrent Deferred income taxes Deferred Tax Liabilities, Net, Noncurrent Other liabilities Other Liabilities, Noncurrent Stockholders' equity: Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract] Common stock, $.01 par value; 500,000,000 shares authorized; 134,763,095 and 133,121,092 shares issued at June 30, 2022 and December 31, 2011, respectively Common Stock, Value, Issued Additional paid-in capital Additional Paid in Capital Treasury stock at cost: 11,727,359 and 11,264,936 at June 30, 2022 and December 31, 2011, respectively Treasury Stock, Value Retained earnings Retained Earnings (Accumulated Deficit) Accumulated other comprehensive loss - net deferred hedge losses, net of tax Accumulated Other Comprehensive Income (Loss), Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Effect Net of Tax Total equity attributable to common stockholders Stockholders' Equity Attributable to Parent Noncontrolling interests in consolidating subsidiaries Stockholders' Equity Attributable to Noncontrolling Interest Total equity Commitments and contingencies Commitments and Contingencies Liabilities and Stockholders' Equity, Total Liabilities and Equity