Position [Axis] Position [Axis] Deferred income taxes Business Combination Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Assets Hedging Designation [Domain] Hedging Designation [Domain] Supplemental disclosure of cash flow information: Supplemental Cash Flow Information [Abstract] Other income (expense), net Other Nonoperating Income, Net Other Nonoperating Income, Net Customer [Domain] Customer [Domain] Changes in operating assets and liabilities: Increase (Decrease) in Other Operating Assets and Liabilities, Net [Abstract] Federal Statutory Income Tax Rate, Percent Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent Vested (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Net income (loss) attributable to Diamondback Energy, Inc. Net income (loss) attributable to common stock Net income (loss) attributable to Diamondback Energy, Inc. 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Derivative, Settlement Month Three [Member] Derivative, Settlement Month Three Purchase of business and assets, net Payments to Acquire Oil and Gas Property Dividend paid Dividends, Common Stock, Cash Redemption and early premium fees Redemption Premium Asset retirement obligations Asset Acquisition, Asset Retirement Obligation Asset Acquisition, Asset Retirement Obligation Proceeds from sale of assets Proceeds from Sale of Property, Plant, and Equipment Forfeited (in USD per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Revenue from Contract with Customer [Abstract] Revenue from Contract with Customer [Abstract] Additional paid-in capital Additional Paid in Capital, Common Stock Entity Filer Category Entity Filer Category July - Sep. Derivative, Settlement Month One [Member] Derivative, Settlement Month One Apr. - June Derivative, Settlement Month Seven [Member] Derivative, Settlement Month Seven Number of extensions Debt Instrument, Number Of Extensions Debt Instrument, Number Of Extensions Other assets Other Assets, Noncurrent Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Segments [Axis] Segments [Axis] Net increase (decrease) in cash and cash equivalents Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Proceeds from the sale of equity method investments Proceeds from Sale of Equity Method Investments Debt, redemption price, percentage Debt Instrument, Redemption Price, Percentage Energy [Domain] Energy [Domain] Company volatility Share-based Compensation Arrangement by Share-based Payment Award, Fair 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[Abstract] Asset Retirement Obligation [Abstract] Proceeds from senior notes Proceeds from Issuance of Senior Long-term Debt Antidilutive securities, restricted stock units (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Current: Derivative Liability, Current [Abstract] Derivative Liability, Current QEP Resources Inc QEP Resources Inc [Member] QEP Resources Inc Subsequent Events [Abstract] Subsequent Events [Abstract] Line of credit facility, additional borrowing capacity Line of Credit Facility, Additional Borrowing Capacity Line of Credit Facility, Additional Borrowing Capacity Henry Hub Henry Hub [Member] Henry Hub Business Combination and Asset Acquisition [Abstract] Aggregated fair value of restricted stock Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value Granted (in USD per share) Share-based Compensation Arrangement by Share-based Payment Award, 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Credit Facility [Member] Unvested, beginning balance (in shares) Unvested, ending balance (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Document type Document Type Net assets acquired and liabilities assumed Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net Disaggregation of Revenue Disaggregation of Revenue [Table Text Block] Restricted Stock Units Performance Restricted Stock Units Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Fair Value Measurement [Domain] Fair Value Measurement [Domain] Diluted: Earnings Per Share, Diluted [Abstract] Amount attributable to assets acquired Asset Acquisition, Assets Acquired Asset Acquisition, Assets Acquired Entity Current Reporting Status Entity Current Reporting Status Shares authorized for issuance (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized Other Property and Equipment, Net Property, Plant and Equipment, Other Types [Member] Net assets acquired and liabilities assumed Asset Acquisition, Assets Acquired and Liabilities Assumed, Net Asset Acquisition, Assets Acquired and Liabilities Assumed, Net Funds held in escrow Escrow Deposit Derivative, Settlement Month [Axis] Derivative, Settlement Month [Axis] Derivative, Settlement Month Oil and natural gas properties, net Capitalized Costs, Oil and Gas Producing Activities, Net Fair value hedges Fair Value Hedges, Net Business combination, total consideration Total consideration Business Combination, Consideration Transferred Federal net losses Federal Income Tax Expense (Benefit), Continuing Operations Viper Energy Partners LP Viper Energy Partners LP Viper Energy Partners LP [Member] Viper Energy Partners LP [Member] Long-term debt, gross Outstanding borrowings Long-term Debt, Gross Midstream Operations Midstream Operations Segment [Member] Midstream Operations Segment [Member] Weighted Average Floor Price (USD per Bbl) Derivative, Floor Price Plan Name [Axis] Plan Name [Axis] Total long-term debt Long-term Debt Number of shares authorized percent of shares granted Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized, Percent of Shares Granted Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized, Percent of Shares Granted Total Gross Fair Value Derivative Liability, Fair Value, Gross Liability, Current Derivative Liability, Fair Value, Gross Liability, Current Level 1 Fair Value, Inputs, Level 1 [Member] Cash flows from investing activities: Net Cash Provided by (Used in) Investing Activities [Abstract] Other Other Operating Activities, Cash Flow Statement Document Transition Report Document Transition Report Income Tax Disclosure [Abstract] Income Tax Disclosure [Abstract] Merger and integration expense Merger and integration expense Expenses related to merger and integration of the merger Repurchased units under buyback program Payments for Repurchase of Common Stock, Units Payments for Repurchase of Common Stock, Units Base Rate Base Rate [Member] Total liabilities and equity Liabilities and Equity Viper 5.375% Senior Notes due 2027 5.375% Senior Notes Due 2027 [Member] 5.375% Senior Notes Due 2027 [Member] Other accrued liabilities Other Accrued Liabilities, Current Other income (expense): Other Income and Expenses [Abstract] Revenues and royalties payable Contract with Customer, Liability, Current Scenario [Axis] Scenario [Axis] Asset retirement obligations Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Asset Retirement Obligation Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Asset Retirement Obligation Oil and Natural Gas Oil and Gas Properties [Member] 3.500% Senior Notes due 2029 3.500% Senior Notes Due 2029 [Member] 3.500% Senior Notes Due 2029 [Member] Liabilities and Stockholders’ Equity Liabilities and Equity [Abstract] Derivative [Line Items] Derivative [Line Items] Derivative, Settlement Year [Axis] Derivative, Settlement Year [Axis] Derivative, Settlement Year Fair value of interest rate swap agreements Interest rate swaps designated as hedges Interest Rate Swap [Member] Mont Belvieu Propane Mont Belvieu Propane [Member] Mont Belvieu Propane Derivative instruments Derivative instruments Derivative Liability, Current Midstream assets Asset Acquisition, Midstream Assets Asset Acquisition, Midstream Assets Rolling Swap Rolling Hedge [Member] Rolling Hedge Revolving credit facility Revolving credit facility Company Credit Facility [Member] Revolving credit facility entered into by Diamondback O&G, LLC. Minimum Minimum [Member] Guidon Operating LLC Guidon Operating LLC [Member] Guidon Operating LLC DESCRIPTION OF THE BUSINESS AND BASIS OF PRESENTATION Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Income tax receivable Income Taxes Receivable, Current Other Increase (Decrease) in Other Operating Assets and Liabilities, Net Long-term line of credit Long-term Line of Credit General and administrative expenses Selling, General and Administrative Expense Unamortized debt issuance costs Debt Issuance Costs, Net Reclassifications Reclassification, Comparability Adjustment [Policy Text Block] Midstream services Natural Gas, Midstream [Member] Eligible shares of QEP common stock to be converted into shares of Diamondback common stock (in shares) Business Acquisition, Equity Interest Issued or Issuable, Number Of Shares, Shares Eligible To Be Converted Business Acquisition, Equity Interest Issued or Issuable, Number Of Shares, Shares Eligible To Be Converted Derivative instruments Derivative instruments Derivative Asset, Current Upstream Upstream Services Segment [Member] Upstream Services Segment [Member] 7.320% Medium-term Notes, Series A, due 2022 7.32% Medium Term Series A due 2022 [Member] 7.32% Medium Term Series A due 2022 [Member] Total Gross Fair Value Derivative Asset, Fair Value, Gross Asset, Non-Current Derivative Asset, Fair Value, Gross Asset, Non-Current Additional liabilities incurred Asset Retirement Obligation, Liabilities Incurred Trading Symbol Trading Symbol Schedule of Change in Ownership Interest Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Table Text Block] Rattler MIdstream LP Rattler MIdstream LP [Member] Rattler MIdstream LP [Member] Deferred income taxes, net Deferred Income Tax Assets, Net Common units issued for acquisitions Stock Issued During Period, Value, Acquisitions Oil and gas properties Asset Acquisition, Oil And Gas Properties Asset Acquisition, Oil And Gas Properties Current liabilities: Liabilities, Current [Abstract] Discrete income tax expense (benefit) related to deferred taxes recorded during the period Discrete income tax benefit related to deferred taxes recorded during the period Discrete income tax benefit related to deferred taxes recorded during the period DEBT Debt Disclosure [Text Block] EQUITY-BASED COMPENSATION Share-based Payment Arrangement [Text Block] QEP Notes QEP Notes [Member] QEP Notes Level 3 Fair Value, Inputs, Level 3 [Member] Dividends to stockholders Payments of Ordinary Dividends, Common Stock Accounting Policies [Abstract] Accounting Policies [Abstract] Unamortized costs Oil and Gas Producing Properties of Rate Regulated Companies, Unamortized Cost Derivative Instrument [Axis] Derivative Instrument [Axis] Partner Type of Partners' Capital Account, Name [Domain] Partner Type of Partners' Capital Account, Name [Domain] Other assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets Unproved properties Costs Incurred, Acquisition of Unproved Oil and Gas Properties Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Total other income (expense), net Nonoperating Income (Expense) Share based payment not recognized Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition Unvested, beginning balance (in USD per share) Unvested, ending balance (in USD per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Performance Shares Performance Shares [Member] Commitments and contingencies (Note 13) Commitments and Contingencies Subsequent Event [Table] Subsequent Event [Table] Proceeds from (repayments to) joint venture Proceeds from joint ventures Proceeds from joint ventures 7.125% Medium-term Notes, Series B, due 2028 7.125% Medium Term Notes Series B [Member] 7.125% Medium Term Notes Series [Member] Proceeds from debt, net Proceeds from Debt, Net of Issuance Costs Natural gas liquid sales Natural Gas Liquids Production [Member] Process related to upstream activity for viscous liquid derived from flammable gas occurring naturally underground. Non-current: Derivative Liability, Non-Current [Abstract] Derivative Liability, Non-Current Revisions in estimated liabilities Asset Retirement Obligation, Revision of Estimate Statement of Partners' Capital [Abstract] Statement of Partners' Capital [Abstract] Short Short [Member] Derivative, Settlement Month [Domain] Derivative, Settlement Month [Domain] Derivative, Settlement Month Permian Permian [Member] Permian Ownership [Axis] Ownership [Axis] Document Period End Date Document Period End Date Accrued capital expenditures included in accounts payable and accrued expenses Increase (Decrease) in Accrued Capital Expenditures Increase (Decrease) in Accrued Capital Expenditures Total costs and expenses Costs and Expenses Net income (loss) Business Acquisition, Pro Forma Net Income (Loss) Entity Registrant Name Entity Registrant Name Oil sales Oil Exploration and Production [Member] Process related to upstream activity for viscous liquid derived from petroleum occurring naturally underground. Activity includes, but is not limited to, exploration, development and production. WTI WTI [Member] WTI Noncontrolling Interest [Line Items] Noncontrolling Interest [Line Items] Prepaid expenses and other current assets Prepaid Expense and Other Assets, Current Oil and Gas, production reserve, volume Oil and Gas, Production Reserve, Volume Oil and Gas, Production Reserve, Volume Financial Instrument [Axis] Financial Instrument [Axis] Total shares of QEP common stock eligible for merger consideration (in shares) Business Acquisition, Equity Interest Issued or Issuable, Number of Shares Dividends declared per share (in USD per share) Common Stock, Dividends, Per Share, Declared Revenue Revenue from Contract with Customer, Excluding Assessed Tax Fair value of assets acquired: Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets [Abstract] Schedule of Asset Acquisition [Line Items] Schedule of Asset Acquisition [Line Items] Schedule of Asset Acquisition Consolidation Items [Domain] Consolidation Items [Domain] Carrying Value Reported Value Measurement [Member] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Equity [Abstract] Equity [Abstract] Derivative instruments Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Derivative Instrument Liabilities Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Derivative Instrument Liabilities Schedule of Asset Acquisition Schedule Of Asset Acquisition [Table Text Block] Schedule Of Asset Acquisition Common Stock Common Stock [Member] Variable Rate [Axis] Variable Rate [Axis] Net cash received (paid) on settlements Gain (Loss) on Sale of Derivatives SEGMENT INFORMATION Segment Reporting Disclosure [Text Block] Energen Notes Energen Notes [Member] Energen Notes [Member] Income (loss) from operations Income (loss) from operations Operating Income (Loss) Property, Plant and Equipment [Table] Property, Plant and Equipment [Table] Hedging Designation [Axis] Hedging Designation [Axis] Increase (Decrease) in Stockholders' Equity Increase (Decrease) in Stockholders' Equity [Roll Forward] Equity-based compensation expense Share-based Payment Arrangement, Noncash Expense Property and equipment: Property, Plant and Equipment [Abstract] Variable Rate [Domain] Variable Rate [Domain] Additional Paid-in Capital Additional Paid-in Capital [Member] Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Oil and gas, production reserve, energy Oil and Gas, Production Reserve, Energy Revenues Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual Costless Collar Costless Collar [Member] Costless Collar Williston Basin Williston Basin [Member] Williston Basin Weighted average differential (per Bbl) Derivative, Weighted Average Differential Derivative, Weighted Average Differential Proceeds from borrowings under credit facilities Proceeds from Lines of Credit Derivative, notional amount Derivative, Notional Amount Oil and natural gas properties, full cost method of accounting ($8,287 million and $7,493 million excluded from amortization at June 30, 2021 and December 31, 2020, respectively) Gross oil and natural gas properties Oil and Gas Property, Full Cost Method, Gross Other income (expense) Other Nonoperating Income (Expense) Debt Long-term Debt, Fair Value Other Payments for (Proceeds from) Other Investing Activities Asset Retirement Obligation, Roll Forward Analysis [Roll Forward] Asset Retirement Obligation, Roll Forward Analysis [Roll Forward] Maximum Maximum [Member] Share-based Payment Arrangement [Abstract] Share-based Payment Arrangement [Abstract] Other property, equipment and land Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Property, Plant And Equipment Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Property, Plant And Equipment Total liabilities Liabilities Legal Entity [Axis] Legal Entity [Axis] 4.750% Senior Notes due 2025 4.750% Senior Notes due 2025 [Member] 4.750% Senior Notes due 2025 Production and ad valorem taxes Production Tax Expense Premium on extinguishment of debt Payment for Debt Extinguishment or Debt Prepayment Cost Award Type [Axis] Award Type [Axis] Cash flows from financing activities: Net Cash Provided by (Used in) Financing Activities [Abstract] Derivative instruments Derivative [Member] External Credit Rating by Grouping [Axis] External Credit Rating by Grouping [Axis] Consolidation Items [Axis] Consolidation Items [Axis] Total Diamondback Energy, Inc. stockholders’ equity Stockholders' Equity Attributable to Parent Shares Issued (in Shares) Common Stock, Shares, Issued Accounts payable and accrued liabilities Increase (Decrease) in Accounts Payable and Accrued Liabilities Derivative, Settlement Year [Domain] Derivative, Settlement Year [Domain] Derivative, Settlement Year Restricted cash Restricted Cash and Cash Equivalents, Current Prepaid expenses and other current assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Prepaid Expense and Other Assets Designated as Hedging Instrument Designated as Hedging Instrument [Member] Current: Derivative Asset, Current [Abstract] Derivative Asset, Current Repayment of senior notes Repurchase of debt Repayments of Senior Debt Loss on extinguishment of debt Loss on extinguishment of debt Gain (Loss) on Extinguishment of Debt Repurchased shares under buyback program Payments for Repurchase of Common Stock Business acquisition, share price (in USD per share) Business Acquisition, Share Price Natural gas sales Natural Gas Income [Member] Natural Gas Income Stockholders’ equity: Stockholders' Equity Attributable to Parent [Abstract] Argus WTI Midland Argus WTI Midland [Member] Argus WTI Midland Derivative instruments Derivative instruments Derivative Asset, Noncurrent Measurement Frequency [Domain] Measurement Frequency [Domain] Schedule of Acquisition Consideration Paid Schedule of Business Acquisitions by Acquisition, Equity Interest Issued or Issuable [Table Text Block] Fair value of Diamondback common stock issued Asset Acquisition, Fair Value Common Stock Issued Asset Acquisition, Fair Value Common Stock Issued Aggregate principal amount Debt Instrument, Face Amount Closing price per share of Diamondback common stock on the closing date (in USD per share) Asset Acquisition, Share Price Asset Acquisition, Share Price Effective percentage Debt Instrument, Interest Rate, Effective Percentage Gross Amounts Offset in Balance Sheet Derivative Liability, Fair Value, Gross Asset, Noncurrent Derivative Liability, Fair Value, Gross Asset, Noncurrent Assets: Derivative Asset [Abstract] City Area Code City Area Code Gross Amounts Offset in Balance Sheet Derivative Asset, Fair Value, Gross Liability. Non-Current Derivative Asset, Fair Value, Gross Liability. Non-Current Retained earnings (accumulated deficit) Retained Earnings (Accumulated Deficit) OIL Crude Oil [Member] Operating Segments Operating Segments [Member] Rattler LLC Rattler LLC [Member] Rattler LLC [Member] Asset retirement obligations, beginning of period Asset retirement obligations, end of period Asset Retirement Obligation Restricted Stock Units (RSUs) Restricted Stock Units (RSUs) [Member] Quarterly commitment fee percentage based on unused portion of borrowing base Line of Credit Facility, Unused Capacity, Commitment Fee Percentage Schedule of Preliminary Purchase Price Allocation Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block] Weighted Average Ceiling Price (USD per Bbl) Derivative, Cap Price Business Acquisition [Line Items] Business Acquisition [Line Items] Risk-free rate Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate Income Statement [Abstract] Income Statement [Abstract] Equity method investments Equity Method Investments Amendment Flag Amendment Flag Fair Value Estimate of Fair Value Measurement [Member] Fair value of interest rate swap agreements Interest Rate Fair Value Hedge Derivative at Fair Value, Net ASSET RETIREMENT OBLIGATIONS Asset Retirement Obligation Disclosure [Text Block] Number of instruments held Derivative, Number of Instruments Held Partner Type [Axis] Partner Type [Axis] Diluted earnings per common share (in USD per share) Business Acquisition, Pro Forma Earnings Per Share, Diluted 4.625% Notes due 2021 4.625% Notes due 2021 [Member] 4.625% Notes due 2021 [Member] Accounts receivable - oil and natural gas sales, net Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables Repayments under credit facilities Repayments of Lines of Credit Other operating income Other Operating Income Provision for (benefit from) income taxes Provision for (benefit from) income taxes Income Tax Expense (Benefit) Total equity Balance at beginning of period Balance at end of period Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Oil and natural gas properties, amortization excluded Not subject to depletion Capitalized Costs of Unproved Properties Excluded from Amortization, Cumulative Oil and natural gas sales, net Accounts Receivable, after Allowance for Credit Loss, Current Equity Components [Axis] Equity Components [Axis] Fair Value Disclosures [Abstract] Fair Value Disclosures [Abstract] Total current assets Assets, Current Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Forfeited (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Inventories Inventory, Net Results Of The Company Business Segments Schedule of Segment Reporting Information, by Segment [Table Text Block] Accrued capital expenditures Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Current Liabilities, Accrued Capital Expenditures Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Current Liabilities, Accrued Capital Expenditures Entity File Number Entity File Number Repurchased units under buyback programs Stock Repurchased During Period, Value Fair value of assets and liabilities measured on a recurring and nonrecurring basis Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Guidon Operating LLC And QEP Resources Guidon Operating LLC And QEP Resources [Member] Guidon Operating LLC And QEP Resources Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Oct. - Dec. Derivative, Settlement Month Two [Member] Derivative, Settlement Month Two Fair Value Measurement Fair Value Measurement, Policy [Policy Text Block] Current maturities of long-term debt Current maturities of long-term debt Long-term Debt, Current Maturities Product and Service [Axis] Product and Service [Axis] Property, Plant and Equipment, Type [Domain] Long-Lived Tangible Asset [Domain] Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Derivative Instruments, Gain (Loss) [Line Items] Derivative Instruments, Gain (Loss) [Line Items] Schedule of Cash, Cash Equivalents and Restricted Cash Schedule of Cash and Cash Equivalents [Table Text Block] Entity Small Business Entity Small Business Basis of Presentation Basis of Accounting [Text Block] Natural gas sales Natural Gas, Production [Member] Equity Component [Domain] Equity Component [Domain] Exercise of stock options and issuance of restricted stock units and awards (in Shares) Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture Repurchased units under buyback programs (in Shares) Stock Repurchased During Period, Shares Disposal Group Name [Domain] Disposal Group Name [Domain] Cash received on contract Derivative, Cash Received on Hedge Acquisition related costs, incurred by QEP Business Combination, Acquisition Related Costs, Incurred By Aquiree Business Combination, Acquisition Related Costs, Incurred By Aquiree Non-current: Derivative Asset, Non-Current [Abstract] Derivative Asset, Non-Current Statement [Line Items] Statement [Line Items] Common units issued for acquisitions (in Shares) Stock Issued During Period, Shares, Acquisitions Redemption, amount Debt Instrument, Redemption, Amount Debt Instrument, Redemption, Amount External Credit Rating by Grouping [Domain] External Credit Rating by Grouping [Domain] Exercise of stock options and issuance of restricted stock units and awards Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture Contractual obligations Other Commitment Jan. - Dec. Derivative, Settlement Month Five [Member] Derivative, Settlement Month Five Debt Disclosure [Abstract] Debt Disclosure [Abstract] Entity Address, State or Province Entity Address, State or Province Income (loss) before income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Level 2 Fair Value, Inputs, Level 2 [Member] Less current portion Asset Retirement Obligation, Current Property, Plant and Equipment, Type [Axis] Long-Lived Tangible Asset [Axis] Funds held in escrow Increase (Decrease) in Deposit Assets Gain (loss) on derivative instruments, net Derivative, Gain (Loss) on Derivative, Net Segment Reporting [Abstract] Segment Reporting [Abstract] Entity [Domain] Entity [Domain] Commodity contracts Commodity Contract [Member] Customer [Axis] Customer [Axis] Use of Estimates Use of Estimates, Policy [Policy Text Block] Schedule of Reconciliation of Basic and Diluted Net Income Per Share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Entity Shell Company Entity Shell Company Amended And Restated Credit Agreement Amended And Restated Credit Agreement [Member] Amended And Restated Credit Agreement [Member] Schedule of Business Acquisitions, by Acquisition [Table] Schedule of Business Acquisitions, by Acquisition [Table] Local Phone Number Local Phone Number Forecast Forecast [Member] Fair Value Measurement Information For Financial Instruments Measured On A Nonrecurring Basis Fair Value Measurements, Nonrecurring [Table Text Block] The effects of stock-based compensation plans and related costs Share-based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block] Debt, redemption price, percentage upon change of control triggering event Debt Instrument, Redemption Price, Percentage, Upon Change Of Control Triggering Event Debt Instrument, Redemption Price, Percentage, Upon Change Of Control Triggering Event Weighted Average Fixed Price (per Bbl/MMBtu/Gallon) Derivative, Swap Type, Fixed Price 3.250% Senior Notes due 2026 3.250% Senior Notes Due 2026 [Member] 3.250% Senior Notes Due 2026 [Member] Total assets Assets Assets Plan Name [Domain] Plan Name [Domain] Distributions to non-controlling interest Payments to Noncontrolling Interests Shares authorized (in Shares) Common Stock, Shares Authorized Net income (loss) attributable to common stock Net Income (Loss) Available to Common Stockholders, Diluted Geographical [Domain] Geographical [Domain] Business Combination, Consideration Transferred [Abstract] Business Combination, Consideration Transferred [Abstract] Non-Controlling Interest Noncontrolling Interest [Member] Product and Service [Domain] Product and Service [Domain] Debt instrument stated interest rate Debt Instrument, Interest Rate, Stated Percentage Derivative Contract [Domain] Derivative Contract [Domain] 5.375% Senior Notes due 2022 5.375% Senior Notes Due 2022 [Member] 5.375% Senior Notes Due 2022 Net income (loss) attributable to non-controlling interest Net Income (Loss) Attributable to Noncontrolling Interest Expandable amount Line of Credit Facility, Maximum Borrowing Capacity, Subject To Commitments Line of Credit Facility, Maximum Borrowing Capacity, Subject To Commitments Restricted Stock Awards & Units Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Significant Accounting Policies [Text Block] Measurement Frequency [Axis] Measurement Frequency [Axis] Net cash provided by (used in) operating activities Net Cash Provided by (Used in) Operating Activities Accrued capital expenditures Accrued Capital Expenditures Accrued Capital Expenditures Fair Value, Recurring and Nonrecurring [Table] Fair Value, Recurring and Nonrecurring [Table] Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Entity Tax Identification Number Entity Tax Identification Number Subsequent Event [Line Items] Subsequent Event [Line Items] Basic: Earnings Per Share, Basic [Abstract] Derivative, average variable interest rate Derivative, Average Variable Interest Rate Geographical [Axis] Geographical [Axis] Basic (in shares) Basic weighted average common units outstanding (in shares) Weighted Average Number of Shares Outstanding, Basic Diluted (in USD per share) Diluted net income attributable to common stock (in USD per share) Earnings Per Share, Diluted Segments [Domain] Segments [Domain] Potential common shares issuable (in shares) Weighted Average Number Diluted Shares Outstanding Adjustment ACQUISITIONS AND DIVESTITURES Mergers, Acquisitions and Dispositions Disclosures [Text Block] Amount attributable to assets acquired Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets Direct operating expenses Business Combination, Pro Forma Information, Direct Operating Expenses since Acquisition Date, Actual Business Combination, Pro Forma Information, Direct Operating Expenses since Acquisition Date, Actual SUBSEQUENT EVENTS Subsequent Events [Text Block] Acquisitions of mineral interests Payments to Acquire Mineral Rights Viper revolving credit facility Viper Credit Facility [Member] Revolving credit facility entered into by Viper Energy Partners, LP, a subsidiary of the reporting entity. Exchange ratio (in shares) Business Combination, Consideration Transferred, Equity Interests Issued and Issuable, Entity Shares Issued Per Acquiree Share Business Combination, Consideration Transferred, Equity Interests Issued and Issuable, Entity Shares Issued Per Acquiree Share Net cash provided by (used in) financing activities Net Cash Provided by (Used in) Financing Activities Weighted average common shares outstanding: Weighted Average Number of Shares Outstanding, Diluted [Abstract] Deferred income taxes Deferred Income Tax Liabilities, Net Performance shares, performance period Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period Jan. - Mar. Derivative, Settlement Month Six [Member] Derivative, Settlement Month Six (Income) loss from equity investment Income (Loss) from Equity Method Investments Derivative instruments Derivative instruments Derivative Liability, Noncurrent Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] Share based compensation arrangement by share based payment maximum award potential (in shares) Share Based Compensation Arrangement by Share Based Payment Maximum Award Potential The maximum number of shares that can be awarded assuming maximum performance earned. Oil sales Oil Income [Member] Oil Income Other operating expense Other Cost and Expense, Operating Summary of restricted stock units Share-based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity [Table Text Block] Brent Brent [Member] Brent Accounts receivable - joint interest and other, net Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Current Assets, Oil and Gas Joint Interest Billing Receivables, Current Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Current Assets, Oil and Gas Joint Interest Billing Receivables, Current Other property, equipment and land Property, Plant and Equipment, Other, Gross FAIR VALUE MEASUREMENTS Fair Value Disclosures [Text Block] Number of additional wells Asset Acquisition, Number Of Additional Wells Asset Acquisition, Number Of Additional Wells Income (loss) from operations Pro forma income (loss) from operations Amount before tax of pro forma income (loss) from continuing operations as if the business combination had been completed at the beginning of a period. Depreciation, depletion, amortization and accretion Depreciation, Depletion and Amortization Energy [Axis] Energy [Axis] Rattler 5.625% Senior Notes due 2025 5.625% Senior Notes Due 2025 [Member] 5.625% Senior Notes Due 2025 Financing portion of net cash received (paid) for derivative instruments Payments for (Proceeds from) Derivative Instrument, Financing Activities Fair Value Measurement Information For Financial Instruments Measured on a Recurring Basis Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Shares Outstanding (in Shares) Balance at beginning of period (in Shares) Balance at end of period (in Shares) Common Stock, Shares, Outstanding Financial Instruments [Domain] Financial Instruments [Domain] Accounts payable - trade Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable Derivative [Table] Derivative [Table] Additions to midstream assets Payments to Acquire Oil and Gas Equipment Cost of goods and services sold Cost of Goods and Services Sold Revenues: Revenues [Abstract] Income taxes receivable Income Taxes Receivable Asset acquisition, price of acquisition, expected Proceeds from Divestiture of Businesses Number of shares issued (in shares) Shares of Diamondback common stock issued at closing (shares) Asset Acquisition, Equity Interest Issued Or Issuable, Number Of Shares Asset Acquisition, Equity Interest Issued Or Issuable, Number Of Shares Accounts receivable: Accounts Receivable, after Allowance for Credit Loss, Current [Abstract] Schedule of Property and Equipment Property, Plant and Equipment [Table Text Block] Waha Hub Waha Hub [Member] Waha Hub Income Statement Location [Domain] Income Statement Location [Domain] Debt instrument, term Debt Instrument, Term Volume (Bbls) Derivative, Nonmonetary Notional Amount, Volume Unit-based compensation Noncontrolling Interest, Increase from Unit-based Compensation Noncontrolling Interest, Increase from Unit-based Compensation March 2021 Notes March 2021 Notes [Member] March 2021 Notes Schedule of Asset Acquisition [Table] Schedule of Asset Acquisition [Table] Schedule of Asset Acquisition Property and equipment, net Property, Plant and Equipment, Net PROPERTY AND EQUIPMENT Property, Plant and Equipment Disclosure [Text Block] Remaining debt Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Long-term Debt Other long-term liabilities Other Liabilities, Noncurrent Depreciation, depletion, amortization and accretion Depreciation, Depletion and Amortization Excluding Amortization of Financing Costs Depreciation, Depletion and Amortization Excluding Amortization of Financing Costs Number of producing wells Oil, Productive Well, Number of Wells, Net Schedule of long-term debt Schedule of Long-term Debt Instruments [Table Text Block] Share-based Payment Arrangement, Expensed and Capitalized, Amount [Table] Share-based Payment Arrangement, Expensed and Capitalized, Amount [Table] Debt Instrument [Line Items] Debt Instrument [Line Items] Earnings (loss) per common share: Earnings Per Share [Abstract] NATURAL GAS LIQUIDS Natural Gas Liquids [Member] Revenues Business Acquisition, Pro Forma Revenue Long-term debt Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Long-term Debt Noncontrolling Interest [Table] Noncontrolling Interest [Table] Document Quarterly Report Document Quarterly Report Total revenues Revenues Revenues Current borrowing capacity Line of Credit Facility, Current Borrowing Capacity Unamortized premium costs Debt Instrument, Unamortized Premium Total Gross Fair Value Derivative Liability, Fair Value, Gross Liability, Noncurrent Derivative Liability, Fair Value, Gross Liability, Noncurrent Line of Credit Facility [Table] Line of Credit Facility [Table] 2021 Derivative Settlement, Year One [Member] Derivative Settlement, Year One Swingline Loans Swingline Loans [Member] Swingline Loans [Member] Total consideration Total consideration Asset Acquisition, Consideration Transferred Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Costs and expenses: Costs and Expenses [Abstract] Drilling, completions and non-operated additions to oil and natural gas properties Payments to Explore and Develop Oil and Gas Properties Number of letters of credit outstanding Number Of Letters Of Credit Outstanding Number Of Letters Of Credit Outstanding Investment Grade Annually External Credit Rating, Investment Grade [Member] Long-term debt Long-term Debt, Excluding Current Maturities General and administrative expenses Share-based Payment Arrangement, Expense Cash consideration Payments for Asset Acquisitions Payments for Asset Acquisitions Weighted Average Grant-Date Fair Value Weighted Average Grant-Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] Document Fiscal Period Focus Document Fiscal Period Focus 5.250% Senior Notes due 2023 5.250% Senior Notes due 2023 [Member] 5.250% Senior Notes due 2023 Effective income tax rate Effective Income Tax Rate Reconciliation, Percent Revenues and royalties payable Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Current Liabilities, Contract with Customer Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Current Liabilities, Contract with Customer Net income (loss) Net income (loss) Net Income (Loss), Including Portion Attributable to Noncontrolling Interest 4.400% Senior Notes due 2051 4.400% Senior Notes due 2051 [Member] 4.400% Senior Notes due 2051 3.125% Senior Notes due 2031 3.125% Senior Notes due 2031 [Member] 3.125% Senior Notes due 2031 Amount attributable to liabilities assumed Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities Swap Swap [Member] Cash, cash equivalents and restricted cash at beginning of period Cash, cash equivalents and restricted cash at end of period Total cash, cash equivalents and restricted cash Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Schedule Of Derivative Contracts Schedule of Derivative Instruments [Table Text Block] Common stock, par value (in USD per share) Common Stock, Par or Stated Value Per Share Current assets: Assets, Current [Abstract] Other Proceeds from (Payments for) Other Financing Activities Common stock available for future grants (in shares) Common Stock, Capital Shares Reserved for Future Issuance Interest expense, net Interest Income (Expense), Nonoperating, Net Argus WTI Houston WTI Houston Argus [Member] WTI Houston Argus Entity Central Index Key Entity Central Index Key LIBOR London Interbank Offered Rate (LIBOR) [Member] Security Exchange Name Security Exchange Name Percentage of outstanding debt Repurchase Of Debt, Percentage Of Outstanding Debt Repurchase Of Debt, Percentage Of Outstanding Debt Common stock issued for business combinations Noncash or Part Noncash Acquisition, Noncash Financial or Equity Instrument Consideration, Shares Issued, Value Noncash or Part Noncash Acquisition, Noncash Financial or Equity Instrument Consideration, Shares Issued, Value Revenue from Contracts with Customers Revenue from Contract with Customer [Policy Text Block] Diluted (in shares) Diluted weighted average common shares outstanding (in shares) Weighted Average Number of Shares Outstanding, Diluted Recurring Fair Value, Recurring [Member] Fair value of liabilities assumed: Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities [Abstract] INCOME TAXES Income Tax Disclosure [Text Block] Change in ownership of consolidated subsidiaries, net Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Changes, Net Current Fiscal Year End Date Current Fiscal Year End Date Basis spread on variable rate Debt Instrument, Basis Spread on Variable Rate Southern Midland Basin Southern Midland Basin [Member] Southern Midland Basin CAPITAL STOCK AND EARNINGS PER SHARE Stockholders' Equity Note Disclosure [Text Block] Subject to depletion Capitalized Costs, Proved Properties Measurement Basis [Axis] Measurement Basis [Axis] Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Asset retirement obligations - long-term Asset Retirement Obligations, Noncurrent Contributions to equity method investments Payments to Acquire Equity Method Investments DrillCo Agreement DrillCo Agreement [Member] DrillCo Agreement Accumulated impairment Capitalized Costs Accumulated Impairment Capitalized costs of accumulated impairment for oil and natural gas properties Area of land (in acre) Area of Land Net cash provided by (used in) investing activities Net Cash Provided by (Used in) Investing Activities Portion at Fair Value Measurement Portion at Fair Value Measurement [Member] Proved properties Costs Incurred, Acquisition of Oil and Gas Properties with Proved Reserves Accumulated depletion, depreciation, amortization and impairment Accumulated depletion and depreciation Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Schedule of Asset Retirement Obligations Schedule of Asset Retirement Obligations [Table Text Block] Impairment of midstream assets Impairment Of Midstream Assets Impairment Of Midstream Assets Cash flows from operating activities: Net Cash Provided by (Used in) Operating Activities [Abstract] Vested (in USD per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Other Other Customer [Member] General and administrative expenses General and Administrative Expense [Member] NATURAL GAS Natural Gas [Member] Income tax receivable Increase (Decrease) in Income Taxes Receivable Total current liabilities Liabilities, Current Eliminations Intersegment Eliminations [Member] Limited Partner Limited Partner [Member] Midstream assets Pipeline and Gas Gathering Assets Pipeline and Gas Gathering Assets Maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Accounts payable - trade Accounts Payable, Trade, Current Cash, cash equivalents and restricted cash Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Ownership [Domain] Ownership [Domain] Entity Address, Postal Zip Code Entity Address, Postal Zip Code Position [Domain] Position [Domain] Additional shares of Diamondback common stock to be issued as merger consideration (in shares) Business Acquisition, Equity Interest Issued Or Issuable, Number Of Shares, Additional Shares Business Acquisition, Equity Interest Issued Or Issuable, Number Of Shares, Additional Shares Derivative Instruments, Gain (Loss) [Table] Derivative Instruments, Gain (Loss) [Table] Line of Credit Facility [Line Items] Line of Credit Facility [Line Items] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Title of 12(b) Security Title of 12(b) Security Federal Funds Rate Fed Funds Effective Rate Overnight Index Swap Rate [Member] Statement [Table] Statement [Table] Impairment of oil and natural gas properties Impairment of Oil and Gas Properties Recent Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Effect of dilutive securities: Dilutive Securities, Effect on Basic Earnings Per Share [Abstract] Share based award not recognized Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount Summary Of Derivatives Not Designated As Hedging Instruments Derivatives Not Designated as Hedging Instruments [Table Text Block] Delaware Basin Delaware Basin [Member] Delaware Basin Offsetting Liabilities Offsetting Liabilities [Table Text Block] Statistical Measurement [Axis] Statistical Measurement [Axis] 0.900% Senior Notes due 2023 0.900% Senior Notes due 2023 [Member] 0.900% Senior Notes due 2023 Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Table] Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Table] Subsequent Event Subsequent Event [Member] Cover [Abstract] Cover [Abstract] Liabilities: Derivative Liability [Abstract] Oil and natural gas properties Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Oil And Gas Properties Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Oil And Gas Properties 2.875% Senior Notes due 2024 2.875% Senior Notes due 2024 [Member] 2.875% Senior Notes due 2024 [Member] Liabilities acquired Asset Retirement Obligation, Liabilities Acquired The increase in asset retirement obligations related to properties acquired. Non-controlling interest Stockholders' Equity Attributable to Noncontrolling Interest Gathering and transportation Natural Gas, Gathering, Transportation, Marketing and Processing [Member] Liabilities settled and divested Asset Retirement Obligation, Liabilities Settled Natural gas liquid sales Natural Gas Liquids Income [Member] Natural Gas Liquids Income Basis Swap Basis Swap [Member] Scenario [Domain] Scenario [Domain] Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Subsequent Event Type [Axis] Subsequent Event Type [Axis] Common stock, $0.01 par value; 400,000,000 shares authorized; 181,049,191 and 158,088,182 shares issued and outstanding at June 30, 2021 and December 31, 2020, respectively Common Stock, Value, Outstanding Strike Price (USD per Bbl) Derivative, Price Risk Option Strike Price Unamortized discount costs Issuance costs and discount Debt Instrument, Unamortized Discount Summary of grant-date fair values of performance restricted stock units granted and related assumptions Schedule of Share-based Payment Award, Employee Stock Purchase Plan, Valuation Assumptions [Table Text Block] Provision for (benefit from) deferred income taxes Deferred Income Tax Expense (Benefit)