Discontinued Operations Assets and Liabilities Included in Assets Held for Sale [Abstract] Discontinued Operations Assets and Liabilities Included in Assets Held for Sale [Abstract] Schedule of Disposal Groups, Including Discontinued Operations, Income Statement, Balance Sheet and Additional Disclosures [Table Text Block] Schedule of Disposal Groups, Including Discontinued Operations, Income Statement, Balance Sheet and Additional Disclosures [Table Text Block] Discontinued Operations Assets and Liabilities Included in Assets and Liabilities Held for Sale [Table Text Block] Discontinued Operations Assets and Liabilities Included in Assets and Liabilities Held for Sale [Table Text Block] [Table Text Block] for Discontinued Operations Assets and Liabilities Included in Assets and Liabilities Held for Sale [Table] Derivative Instruments and Hedging Activities Disclosure [Abstract] Derivative [Table] Derivative [Table] Hedging Designation [Axis] Hedging Designation [Axis] Hedging Designation [Domain] Hedging Designation [Domain] Not Designated as Hedging Instrument [Member] Not Designated as Hedging Instrument [Member] Derivative Instrument Risk [Axis] Derivative Instrument [Axis] Derivative Contract Type [Domain] Derivative Contract [Domain] Commodity Price Derivatives [Member] Commodity Contract [Member] Interest Rate Derivatives [Member] Interest Rate Contract [Member] Balance Sheet Location [Axis] Balance Sheet Location [Axis] Balance Sheet Location [Domain] Balance Sheet Location [Domain] Derivatives - Current [Member] Derivative Current [Member] Derivative Current [Member] Derivatives - Noncurrent [Member] Derivative Noncurrent [Member] Derivative Noncurrent [Member] Derivative [Line Items] Derivative [Line Items] Total derivatives, Asset, Gross Derivative Asset, Fair Value, Gross Asset Total derivatives, Liability. Gross Derivative Liability, Fair Value, Gross Liability Derivative Assets Offset In Balance Sheet Derivative Assets Offset In Balance Sheet Derivative Assets Offset In Balance Sheet Derivative Liabilities Offset In Balance Sheet Derivative Liabilities Offset In Balance Sheet Derivative Liabilities Offset In Balance Sheet Derivative Assets, Current Derivative Asset, Current Derivative Assets, Noncurrent Derivative Asset, Noncurrent Derivative Asset, Fair Value, Net Derivative Asset, Fair Value, Amount Not Offset Against Collateral Derivative Liabilities, Current Derivative Liability, Current Derivative Liabilities, Noncurrent Derivative Liability, Noncurrent Derivative Liability, Fair Value, Net Derivative Liability, Fair Value, Amount Not Offset Against Collateral Debt Disclosure [Abstract] Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] 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] Debt Instrument [Line Items] Debt Instrument [Line Items] Maximum Borrowing Capacity Line of Credit Facility, Maximum Borrowing Capacity Outstanding borrowing Line of Credit Facility, Amount Outstanding Unused borrowing capacity Line of Credit Facility, Remaining Borrowing Capacity Senior notes, interest rate, percentage Debt Instrument, Interest Rate, Stated Percentage Statement of Financial Position [Abstract] 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 Income Tax Disclosure [Abstract] Income Taxes Income Tax Disclosure [Text Block] NonRecurring Fair Value Disclosures [Abstract] NonRecurring Fair Value Disclosures [Abstract] Fair Value Measurements, Recurring and Nonrecurring [Table] Fair Value Measurements, Recurring and Nonrecurring [Table] Operating Activities [Axis] Operating Activities [Axis] Operating Activities [Domain] Operating Activities [Domain] Discontinued Operations [Member] Discontinued Operations [Member] Long Lived Assets Held-for-sale by Asset Type [Axis] Long Lived Assets Held-for-sale by Asset Type [Axis] Long Lived Assets Held-for-sale, Name [Domain] Long Lived Assets Held-for-sale, Name [Domain] Pioneer Alaska [Member] Pioneer Alaska [Member] Pioneer Alaska [Member] Barnett Shale Field [Member] Barnett Shale Field [Member] Barnett Shale Field [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] Fair Value of Asset Group Fair Value of Asset Group Fair Value of Asset Group Impairment of oil and gas properties Impairment of Oil and Gas Properties Management oil price outlook Management oil price outlook Management oil price outlook Management gas price outlook Management gas price outlook Management gas price outlook Defined Benefit Pension Plans and Defined Benefit Postretirement Plans Disclosure [Abstract] Schedule of Share Based Incentive Award Activity Schedue of Share Based Incentive Award Activity [Table Text Block] Schedue of Share Based Incentive Award Activity [Table Text Block] Exploratory Cost Disclosure [Abstract] -- None. No documentation exists for this element. -- Exploratory Costs Oil and Gas Exploration and Production Industries Disclosures [Text Block] Organization, Consolidation and Presentation of Financial Statements [Abstract] Presentation Consolidation, Policy [Policy Text Block] New Accounting Pronouncements, Policy [Policy Text Block] New Accounting Pronouncements, Policy [Policy Text Block] Commitments and Contingencies Disclosure [Abstract] Commitments And Contingencies Commitments and Contingencies Disclosure [Text Block] Income Statement Location [Axis] Income Statement Location [Axis] Income Statement and Other Comprehensive Income Location [Domain] Income Statement Location [Domain] Derivative Gains, Net [Member] Derivative Gains Losses [Member] Derivative gains (losses) [Member] Derivative losses, net Gain (Loss) on Derivative Instruments, Net, Pretax Earnings Per Share [Abstract] Reconciliation of earnings attributable to common stockholders, basic and diluted Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Reconciliation Of Basic To Diluted Weighted Average Common Shares Outstanding Schedule of Weighted Average Number of Shares [Table Text Block] Fair Value Disclosures [Abstract] Fair Value Measurements Fair Value Disclosures [Text Block] Statement of Stockholders' Equity [Abstract] Dividends declared per share Common Stock, Dividends, Per Share, Declared Interest and Other Income [Abstract] Interest And Other Income Other Income and Other Expense Disclosure [Text Block] Current Income Tax Expense (Benefit) Current Income Tax Expense (Benefit) Deferred income taxes Deferred Income Tax Expense (Benefit) Income tax provision (benefit) Income Tax Expense (Benefit) Effective Tax Rate Effective Income Tax Rate Reconciliation, Percent Statutory Tax Rate Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent Unrecognized tax benefit recognized in period Unrecognized tax benefit recognized in period Unrecognized tax benefit recognized in period Incentive Plans Compensation and Employee Benefit Plans [Text Block] Organization And Nature Of Operations Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Acquisitions and Divestitures [Abstract] Acquisitions and Divestitures [Abstract] Acquisition and Divestitures Mergers, Acquisitions and Dispositions Disclosures [Text Block] Capitalized Exploratory Well and Project Activity [Table] Capitalized Exploratory Well and Project Activity [Table] Capitalized Exploratory Well and Project Activity [Table] Project [Axis] Project [Axis] Project [Domain] Project [Domain] Project [Domain] Capitalized exploratory costs [Member] Capitalized exploratory costs [Member] Capitalized exploratory costs [Member] Statement [Line Items] Statement [Line Items] 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 Capitalized Exploratory Well Cost Assets Disposition Capitalized Exploratory Well Cost Assets Disposition Capitalized Exploratory Well Cost Assets Disposition Exploratory well costs charged to exploration expense Capitalized Exploratory Well Cost, Charged to Expense Ending capitalized exploratory costs Disposal Group, Including Discontinued Operation, Property, Plant, and Equipment, Net Disposal Group, Including Discontinued Operation, Property, Plant, and Equipment, Net Capitalized exploratory costs that have been suspended, One year or less Capitalized Exploratory Well Costs that Have Been Capitalized for Period of One Year or Less Capitalized Exploratory Well Costs that Have Been Capitalized for Period Greater than One Year Capitalized Exploratory Well Costs that Have Been Capitalized for Period Greater than One Year Number of projects with exploratory costs that have been suspended for a period greater than one year Projects that have Exploratory Well Costs that have been Capitalized for Period Greater than One Year, Number of Projects Fair Value, by Balance Sheet Grouping, Disclosure Item Amounts [Axis] Measurement Basis [Axis] Fair Value, Disclosure Item Amounts [Domain] Fair Value Measurement [Domain] Reported Value Measurement [Member] Reported Value Measurement [Member] Estimate of Fair Value Measurement [Member] Estimate of Fair Value Measurement [Member] Long-term Debt, Excluding Current Maturities Long-term Debt, Excluding Current Maturities Share-based Award Activity [Abstract] Share-based Award Activity [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] Class of Stock [Axis] Class of Stock [Axis] Class of Stock [Domain] Class of Stock [Domain] Restricted Stock Equity Awards [Member] Restricted Stock Equity Awards [Member] Restricted Stock-Equity Awards [Member] Restricted Stock Liability Awards [Member] Restricted Stock Liability Awards [Member] Restricted Stock Liability Awards [Member] Performance Units [Member] Performance Units [Member] Performance Units [Member] Stock Options [Member] Employee Stock Option [Member] 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, Equity Instruments Other than Options, Nonvested, Number Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants 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, 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, Exercises in Period Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested, Number of Shares Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested, Number of Shares 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 Statement of Cash Flows [Abstract] Cash flows from operating activities: Net Cash Provided by (Used in) Operating Activities [Abstract] Net income Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Adjustments to reconcile net income to net cash provided by operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Depletion, depreciation and amortization Depreciation, Depletion and Amortization Exploration expenses, including dry holes Dry Hole Expense The amount of noncash dry hole and unproved property abandonment expense during the period. Gain on disposition of assets, net Gain (Loss) on Disposition of Property Plant Equipment Accretion of discount on asset retirement obligations Asset Retirement Obligation, Accretion Expense 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 Amortization of Financing Costs and Discounts Derivative related activity Noncash Gain Loss On Derivative Instruments Aggregate net noncash 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 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 Proceeds from issuance of common stock, net of issuance costs Proceeds from Issuance of Common Stock 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 from Share-based Compensation, Financing Activities Payments of financing fees Payments of Financing Costs Dividends paid Payments of Dividends Net cash provided by 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 Marketing Gas contracts, in MMBTU [Member] Marketing Gas contracts, in MMBTU [Member] Marketing Gas contracts, in MMBTU [Member] Marketing gas contracts, price per MMBTU [Member] Marketing gas contracts, price per MMBTU [Member] Marketing gas contracts, price per MMBTU [Member] Marketing Oil contracts, in BBL [Member] Marketing Oil contracts, in BBL [Member] Marketing Oil contracts, in BBL [Member] Marketing oil contracts, price per BBL [Member] [Member] Marketing oil contracts, price per BBL [Member] [Member] Marketing oil contracts, price per BBL [Member] [Member] Trading Activity [Axis] Trading Activity [Axis] Trading Activity, by Type [Domain] Trading Activity, by Type [Domain] Basis Swap Contracts for Current Year [Member] Basis Swap Contracts for Current Year [Member] Basis Swap Contracts for Current Year Derivative, Nonmonetary Notional Amount Derivative, Nonmonetary Notional Amount Derivative, Swap Type, Average Fixed Price Derivative, Swap Type, Average Fixed Price Asset Retirement Obligation [Abstract] Asset Retirement Obligation, Roll Forward Analysis [Roll Forward] Asset Retirement Obligation, Roll Forward Analysis [Roll Forward] Beginning asset retirement obligations Asset Retirement Obligation AssetRetirementObligationLiabilitiesAcquiredInBusinessCombination AssetRetirementObligationLiabilitiesAcquiredInBusinessCombination AssetRetirementObligationLiabilitiesAcquiredInBusinessCombination Asset Retirement Obligation, Liabilities Incurred Asset Retirement Obligation, Liabilities Incurred 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 Ending asset retirement obligations Asset retirement obligations, current portions Asset Retirement Obligation, Current Derivative Financial Instruments Derivative Instruments and Hedging Activities Disclosure [Text Block] Reconciliation of Basic Weighted Average Shares to Diluted Weighted Average Shares [Table] Reconciliation of Basic Weighted Average Shares to Diluted Weighted Average Shares [Table] Reconciliation of Basic Weighted Average Shares to Diluted Weighted Average Shares [Table] Antidilutive Securities [Axis] Antidilutive Securities [Axis] Antidilutive Securities, Name [Domain] Antidilutive Securities, Name [Domain] Unvested Performance units [Member] Unvested Performance units [Member] Unvested Performance units [Member] Conversion rights [Member] Conversion rights [Member] Conversion rights [Member] Weighted Average Number of Shares Outstanding Reconciliation [Line Items] Weighted Average Number of Shares Outstanding Reconciliation [Line Items] Weighted Average Number of Shares Outstanding Reconciliation [Line Items] Basic Weighted Average Number of Shares Outstanding, Basic Dilutive common stock options Incremental Common Shares Attributable to Dilutive Effect of Call Options and Warrants Convertible senior notes dilution Incremental Common Shares Attributable to Dilutive Effect of Conversion of Debt Securities Contingently issuable performance unit shares Incremental Common Shares Attributable to Dilutive Effect of Contingently Issuable Shares Diluted Weighted Average Number of Shares Outstanding, Diluted Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Discontinued Operations and Disposal Groups [Abstract] Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Table] Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Table] Disposal Group Name [Axis] Disposal Group Name [Axis] Disposal Groups, Including Discontinued Operations, Name [Domain] Disposal Groups, Including Discontinued Operations, Name [Domain] Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] Assets of Disposal Group, Including Discontinued Operation, Current Assets of Disposal Group, Including Discontinued Operation, Current Assets held for sale Assets of Disposal Group, Including Discontinued Operation Liabilities of Disposal Group, Including Discontinued Operation, Current Liabilities of Disposal Group, Including Discontinued Operation, Current Disposal Group, Including Discontinued Operation, Other Liabilities Disposal Group, Including Discontinued Operation, Other Liabilities Liabilities held for sale Liabilities of Disposal Group, Including Discontinued Operation Schedule of assets and liabilities measured at fair value on a recurring basis Fair Value, Assets Measured on Recurring Basis [Table Text Block] Fair Value of Assets Classified as Held for Sale [Table Text Block] Fair Value of Assets Classified as Held for Sale [Table Text Block] Fair Value of Assets Classified as Held for Sale [Table Text Block] Schedule of carrying values and financial instruments not carried at fair value Fair Value, by Balance Sheet Grouping [Table Text Block] Capitalized exploratory well and project activity Capitalized Exploratory Well and Project Activity [Table Text Block] Capitalized Exploratory Well and Project Activity [Table Text Block] Aging of capitalized exploratory costs and the number of projects for which exploratory costs have been capitalized Schedule of Projects with Exploratory Well Costs Capitalized for More than One Year [Table Text Block] Subsequent Events [Abstract] Subsequent Event [Table] Subsequent Event [Table] Legal Entity [Axis] Legal Entity [Axis] Entity [Domain] Entity [Domain] Pioneer Southwest [Member] Pioneer Southwest [Member] Relating to Pioneer Southwest. Subsequent Event [Line Items] Subsequent Event [Line Items] Significant Acquisition and Disposal, Acquisition Costs or Sales Proceeds Significant Acquisitions and Disposals, Acquisition Costs or Sale Proceeds Gain (loss) on disposition of assets, net Gain (Loss) on Disposition of Assets for Financial Service Operations Schedule of asset retirement obligations Schedule of Asset Retirement Obligations [Table Text Block] Schedule of oil derivative contracts volume and weighted average price Schedule of Oil Derivative Contracts volume and weighted average price [Table Text Block] Schedule of Oil Derivative Contracts Volume and Weighted Average Price [Text Block] Schedule of NGL derivative volumes and weighted average prices Schedule of NGL Derivative Volumes and Weighted Average Prices [Table Text Block] Schedule of NGL Derivative Volumes and Weighted Average Prices [Table Text Block] Schedule of gas derivative 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] Offsetting Asset and Liability Offsetting Asset and Liability [Table Text Block] Offsetting Asset and Liability [Table Text Block] Schedule of derivative gains and losses recognized on statement of operations Schedule of Derivative Gains and Losses Recognized on Statement of Operations [Table Text Block] Schedule of Derivative Gains and Losses Recognized on Statement of Operations [Text Block] Defined Contribution Pension and Other Postretirement Plans Disclosure [Abstract] Deferred Compensation Arrangement with Individual, Compensation Expense Deferred Compensation Arrangement with Individual, Compensation Expense Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period Accounts Payable, Current Accounts Payable, Current Postretirement benefit obligation Defined Benefit Plan, Benefit Obligation Basis Of Presentation Basis of Presentation and Significant Accounting Policies [Text Block] Commodity Derivatives [Member] Commodity [Member] Fair Value, Hierarchy [Axis] Fair Value, Hierarchy [Axis] Fair Value, Measurements, Fair Value Hierarchy [Domain] 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] Trading Securities, Fair Value Disclosure Trading Securities Derivative Asset, Fair Value, Net Deferred Compensation Plan Assets Deferred Compensation Plan Assets Assets, Fair Value Disclosure Assets, Fair Value Disclosure Liabilities, Fair Value Disclosure Financial and Nonfinancial Liabilities, Fair Value Disclosure Recurring Measurements, (Fair Value, Total) Recurring Measurements, (Fair Value, Net) Recurring Measurements, (Fair Value, Net). Oil contracts [Member] Oil contracts [Member] Oil contracts [Member] Oil contracts, price per bbl [Member] Oil contracts, price per bbl [Member] Oil contracts, price per bbl [Member] Collar Contracts With Short Puts for Year 2 - Extendible for Year 3 [Member] Collar Contracts With Short Puts for Year 2 - Extendible for Year 3 [Member] Collar Contracts With Short Puts for Year 2 - Extendible for Year 3 [Member] Rollfactor Swap Contracts [Member] Rollfactor Swap Contracts [Member] Rollfactor Swap Contracts [Member] Swap Contracts for Current Year [Member] Swap Contracts for Current Year [Member] Swap Contracts for Current Year [Member] Swap Contracts for Year 2 [Member] Swap Contracts for Year 2 [Member] Swap Contracts for Year 2 [Member] Swap Contracts for Year 3 [Member] Swap Contracts for Year 3 [Member] Swap Contracts for Year 3 [Member] Rollfactor Swap Contracts for Current Year [Member] Rollfactor Swap Contracts for Current Year [Member] Rollfactor Swap Contracts for Current Year [Member] Rollfactor Swap Contracts for Year 2 [Member] Rollfactor Swap Contracts for Year 2 [Member] Rollfactor Swap Contracts for Year 2 [Member] Rollfactor Swap Contracts for Year 3 [Member] Rollfactor Swap Contracts for Year 3 [Member] Rollfactor Swap Contracts for Year 3 [Member] Collar Contracts With Short Puts for Current Year [Member] Collar Contracts With Short Puts for Current Year [Member] Collar Contracts With Short Puts for Current Year [Member] Collar Contracts With Short Puts for Year 2 [Member] Collar Contracts With Short Puts for Year 2 [Member] Collar Contracts With Short Puts for Year 2 [Member] Collar Contracts With Short Puts for Year 3 [Member] Collar Contracts With Short Puts for Year 3 [Member] Collar Contracts With Short Puts for Year 3 [Member] Derivative, by Nature [Axis] Derivative, by Nature [Axis] Derivative, Name [Domain] Derivative, Name [Domain] Short Put [Member] Short Put [Member] Short Put [Member] Average daily oil production derivative barrels per day Average daily oil production derivative barrels per day Average Daily Oil Production Derivative Barrels Per Day Derivative, Average Cap Price Derivative, Average Cap Price Derivative, Average Floor Price Derivative, Average Floor Price Derivative, Notional Amount, Price Per Unit Derivative, Notional Amount, Price Per Unit The price per unit of the notional amount of the derivative contract expressed in nonmonetary units. For example, the price per barrel specified in a fuel oil forward purchase contract. NYMEX swap multiple, second nearby month Swap Multiple Second Nearby Month Swap Multiple Second Nearby Month NYMEX swap multiple, third nearby month Swap Multiple Third Nearby Month Swap Multiple Third Nearby Month ASSETS Assets [Abstract] Current assets: Assets, Current [Abstract] Cash and cash equivalents Accounts receivable: Accounts Receivable, Net, Current [Abstract] Trade, net 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 Other current assets: Other Assets, Current [Abstract] Other Assets, Current [Abstract] Derivatives 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 Derivative Assets, Noncurrent Other, net 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 Other current liabilities: Other Liabilities, Current [Abstract] Derivative Liabilities, Current Other Other Liabilities, Current Total current liabilities Liabilities, Current 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 Common Stock, Value, Issued Additional paid-in capital Additional Paid in Capital Treasury stock at cost Treasury Stock, Value Retained earnings Retained Earnings (Accumulated Deficit) Total equity attributable to common stockholders Stockholders' Equity Attributable to Parent Noncontrolling interests in consolidating subsidiaries Stockholders' Equity Attributable to Noncontrolling Interest Total equity Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Commitments and contingencies Commitments and Contingencies Liabilities and Stockholders' Equity, Total Liabilities and Equity Long-Term Debt Long-term Debt [Text Block] Asset Retirement Obligations Asset Retirement Obligation Disclosure [Text Block] Acquisitions and Divestitures [Table] Gain (loss) on sale of assets [Table] Gain (loss) on sale of assets [Table] Lease Contract through Year 2 [Member] Lease Contract through Year 2 [Member] Lease Contract through Year 2 [Member] Lease Contract for Year 3 [Member] Lease Contract for Year 3 [Member] Lease Contract for Year 3 [Member] Other Ownership Interests Name [Axis] Other Ownership Interests Name [Axis] Other Ownership Interests, Name [Domain] Other Ownership Interests, Name [Domain] Limited Partner Interest [Member] Limited Partner Interest [Member] Limited Partner Interest [Member] Wolfcamp [Member] Wolfcamp [Member] Wolfcamp [Member] Sendero [Member] Sendero [Member] Sendero [Member] Gaines Dawson [Member] Gaines Dawson [Member] Gaines Dawson [Member] West Panhandle [Member] West Panhandle [Member] West Panhandle [Member] Eagle Ford Shale [Member] Eagle Ford Shale [Member] Eagle Ford Shale [Member] Acquisitions and Divestitures [Line Items] Gain Loss on Sale of Assets [Line Items] Gain Loss on Sale of Assets [Line Items] Gain on disposition of assets, net Proceeds from Divestiture of Interest in Consolidated Subsidiaries Proceeds from Divestiture of Interest in Consolidated Subsidiaries Drilling rigs leased Drilling rigs leased Drilling rigs leased Proceeds from Sale of Productive Assets Maximum Payments From Related Party For Exploration Drilling And Completion Costs Maximum Payments From Related Party For Exploration Drilling And Completion Costs Maximum Payments From Related Party For Exploration Drilling And Completion Costs Payments From Related Party For Exploration Drilling And Completion Costs Percent Payments From Related Party For Exploration Drilling And Completion Costs Percent Payments From Related Party For Exploration Drilling And Completion Costs Percent Maximum Distribution Made to Limited Partner, Distributions Declared, Per Unit Maximum Distribution Made to Limited Partner, Distributions Declared, Per Unit Maximum Distribution Made to Limited Partner, Distributions Declared, Per Unit Joint Venture Investment Ownership Percentage Joint Venture Investment Ownership Percentage Investment in Joint Venture Components of interest and other income Interest and Other Income [Table Text Block] Other Expense [Abstract] Other Expense [Abstract] Transportation commitment charges Transportation Commitment Loss Transportation Commitment Loss Other Other General Expense Contingency and environmental accrual adjustments Change In Accrual For Legal And Environmental Contingencies Change in Accrual for Legal and Environmental Contingencies. Above market and idle drilling and well services equipment charges Idle Rig Expense Expenses from idle and terminate rigs. Terminated drilling rig contract charges Terminated Drilling Rig Expense Terminated Drilling Rig Expense Inventory valuation charges Tangible Asset Impairment Charges Total other expense Other Nonoperating Expense Equity interest in income of unconsolidated affiliate Income (Loss) from Equity Method Investments Other income Other Income Deferred compensation plan income Deferred Compensation Plan Income Deferred Compensation Plan Income Third-party income (loss) from vertical integration services Third-party income from vertical integration services Third-party income from vertical integration services (b) Interest income Other Interest and Dividend Income Total interest and other income Other Nonoperating Income GrossRevenuesIncludedInThirdPartyIncomeFromVerticalIntegrationServices GrossRevenuesIncludedInThirdPartyIncomeFromVerticalIntegrationServices GrossRevenuesIncludedInThirdPartyIncomeFromVerticalIntegrationServices GrossExpensesIncludedInThirdPartyIncomeFromVerticalIntegrationServices GrossExpensesIncludedInThirdPartyIncomeFromVerticalIntegrationServices GrossExpensesIncludedInThirdPartyIncomeFromVerticalIntegrationServices Income Statement [Abstract] Statement [Table] Statement [Table] Scenario [Axis] Scenario [Axis] Scenario, Unspecified [Domain] Scenario, Unspecified [Domain] Comprehensive (Income) Loss, Net of Tax, Attributable to Noncontrolling Interest Comprehensive (Income) Loss, Net of Tax, Attributable to Noncontrolling Interest Revenues and other income: Revenues [Abstract] Oil and gas Oil and Gas Revenue Sales of purchased oil and gas Revenue from Purchased Oil and Gas Interest and other Total revenues and other income Total revenues and other income Total revenues and income from equity affiliates and other income. Costs and expenses: Costs and Expenses [Abstract] Oil and gas production Oil and Gas Production Expense Production and ad valorem taxes Taxes, Miscellaneous Purchased oil and gas Cost of Purchased Oil and Gas Exploration and abandonments Exploration Abandonment and Impairment Expense General and administrative General and Administrative Expense Interest Interest Expense Other Costs and Expenses Costs and Expenses Income from continuing operations before income taxes Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest Income tax provision Income from continuing operations Income (Loss) from Continuing Operations, Including Portion Attributable to Noncontrolling Interest Income (loss) from discontinued operations, net of tax Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest Net income Net income attributable to noncontrolling interests Net Income (Loss) Attributable to Noncontrolling Interest Net income attributable to common stockholders Net Income (Loss) Attributable to Parent Basic earnings per share: Earnings Per Share, Basic [Abstract] Income from continuing operations Income (Loss) from Continuing Operations, Per Basic Share Income (loss) from discontinued operations Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Basic Share Net income Earnings Per Share, Basic Diluted earnings per share: Earnings Per Share, Diluted [Abstract] Income from continuing operations Income (Loss) from Continuing Operations, Per Diluted Share Income (loss) from discontinued operations Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Diluted Share Net income Earnings Per Share, Diluted Weighted average shares outstanding: Weighted Average Number of Shares Outstanding, Diluted [Abstract] Diluted Amounts attributable to common stockholders: Income Amounts Attributable to Parent, Disclosures [Abstract] Income from continuing operations Income (Loss) from Continuing Operations Attributable to Parent Income (loss) from discontinued operations, net of tax Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent Net income Schedule of Other Ownership Interests [Table] Schedule of Other Ownership Interests [Table] General Partner Interest [Member] General Partner Interest [Member] General Partner Interest [Member] Summary Of Significant Accounting Policies [Line Items] Summary Of Significant Accounting Policies [Line Items] Summary Of Significant Accounting Policies [Line Items] 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] Continuing Operations [Member] Continuing 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 Participating basic earnings Participating Securities, Distributed and Undistributed Earnings Basic income attributable to common stockholders, Basic 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 Net Income (Loss) Per Share Earnings Per Share [Text Block] Projects with Exploratory Well Costs Capitalized for More than One Year [Table] Projects with Exploratory Well Costs Capitalized for More than One Year [Table] Nuna [Member] Nuna [Member] Nuna [Member] Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items] Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items] 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. Production and ad valorem taxes Exploration and abandonment Other Nonoperating Expense Income (Loss) from Discontinued Operation, before Income Tax Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax Current Income Tax (Expense) Benefit Deferred Income Tax (Expense) Benefit Income (Loss) from Discontinued Operations, Net of Tax Other Expense Other Operating Expenses Text Block Other Operating Expenses [Text Block] Subsequent Events Subsequent Events [Text Block] Basis Swap Contracts for Year 2 [Member] Basis Swap Contracts for Year 2 [Member] Basis Swap Contracts for Year 2 Basis Swap Contracts for Year 3 [Member] Basis Swap Contracts for Year 3 [Member] Basis Swap Contracts for Year 3 [Member] Gas contracts, in MMBTU [Member] Gas contracts, in MMBTU [Member] Gas contracts, in MMBTU [Member] Gas contracts, price per MMBTU [Member] Gas contracts, price per MMBTU [Member] Gas contracts, price per MMBTU [Member] Average Daily Gas Production Derivatives Volume per Day Average Daily Gas Production Derivatives Volume per Day Average Daily Gas Production Derivatives Volume per Day Derivative, Swap Type, Fixed Price Derivative, Swap Type, Fixed Price 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] Noncontrolling Interests [Member] Noncontrolling Interest [Member] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Beginning Balance, shares Shares, Outstanding Beginning Balance Stock Issued During Period, Shares, New Issues Stock Issued During Period, Shares, New Issues Stock Issued During Period, Value, New Issues Stock Issued During Period, Value, New Issues Dividends declared ($0.04 per share) Dividends, Cash Exercise of long-term incentive plan stock options, shares Exercise of long-term incentive plan stock options Stock Issued During Period, Value, Stock Options Exercised Treasury stock purchases, shares Treasury Stock, Shares, Acquired Treasury stock purchases Treasury Stock, Value, Acquired, Cost Method Stock Issued During Period, Shares, Conversion of Convertible Securities Stock Issued During Period, Shares, Conversion of Convertible Securities Conversion of 2.875% senior convertible notes Stock Issued During Period, Value, Conversion of Convertible Securities Sendero divestiture Noncontrolling Interest, Decrease from Deconsolidation Tax benefit related to stock-based compensation Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation Pioneer Southwest merger transaction costs Adjustments to Additional Paid in Capital, Other Compensation costs: Share-based Compensation [Abstract] 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. 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. Compensation costs included in net income Allocated Share-based Compensation Expense Cash distributions to noncontrolling interests Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders Ending Balance, shares Ending Balance July 15, 2022 Interest Rate Swaps [Member] July 15, 2022 Interest Rate Swaps [Member] July 15, 2022 Interest Rate Swaps [Member] Trading Activity, Gains and Losses, Net [Line Items] Trading Activity, Gains and Losses, Net [Line Items] Derivative, Fixed Interest Rate Derivative, Fixed Interest Rate Notional amount of debt Swap Contract Notional Amount Fixed Rate of Interest and Variable LIBOR Swap Contract Notional Amount Fixed Rate of Interest and Variable LIBOR Proceeds from Termination of Interest Rate Derivatives Proceeds from Termination of Interest Rate Derivatives Proceeds from Termination of Interest Rate Derivatives Derivative, Average Variable Interest Rate Derivative, Average Variable Interest Rate 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 NGL contract, in BBLS [Member] NGL contract, in BBLS [Member] NGL contract, in BBLS [Member] NGL contracts, price per BBL [Member] NGL contracts, price per BBL [Member] NGL contracts, price per BBL [Member] Collar Contracts for Year 2 [Member] Collar Contracts for Year 2 [Member] Collar Contracts for Year 2 [Member] Collar Contracts for Current Year [Member] Collar Contracts for Current Year [Member] Collar Contracts for Current Year [Member] Collar Contracts With Short Puts for May Through December Current Year [Member] Collar Contracts With Short Puts for May Through December Current Year [Member] Collar Contracts With Short Puts for May Through December Current Year [Member] Collar Contracts With Short Puts for June Through December Current Year [Member] Collar Contracts With Short Puts for June Through December Current Year [Member] Collar Contracts With Short Puts for June Through December Current Year [Member] Average Daily NGL Production Derivative Barrels Per Day Average Daily NGL Production Derivative Barrels Per Day Average Daily NGL Production Derivative Barrels Per Day Schedule of components of other expense Schedule of Components of Other Expense Text Block Schedule of Components of Other Expense Text Block Income tax (provisions) benefits attributable to income from continuing operations Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]