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BRENT 2020 Three-Way Collars - BRENT [Member] 2020 Three-Way Collars - BRENT [Member] Supplemental disclosure of non-cash transactions: Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract] Entity Central Index Key Entity Central Index Key Oil Put Spread - WTI Magellan East Houston 2020 Oil Put Spread - WTI Magellan East Houston 2020 [Member] Oil Put Spread - WTI Magellan East Houston 2020 [Member] Interest Rate Derivative, Fixed Interest Rate Revenues and royalties payable Contract with Customer, Liability, Current Entity Emerging Growth Company Entity Emerging Growth Company Subsequent Event [Line Items] Subsequent Event [Line Items] Accounts payable-trade Accounts Payable, Trade, Current Volume, energy measure (MMBtu) Derivative, Nonmonetary Notional Amount, Energy Measure Natural Gas Liquid Swaps - Mont Belvieu Propane 2021 Natural Gas Liquid Swaps - Mont Belvieu Propane 2021 [Member] Natural Gas Liquid Swaps - Mont Belvieu Propane 2021 Derivative Contract [Domain] Derivative Contract [Domain] Diluted (in shares) Diluted weighted average common shares outstanding (in shares) Weighted Average Number of Shares Outstanding, Diluted Basic (in USD per share) Basic net income attributable to common stock (in USD per share) Earnings Per Share, Basic Other (expense) income: Other Income and Expenses [Abstract] Number of business segments Number of Operating Segments Forfeited (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Debt Disclosure [Abstract] Debt Disclosure [Abstract] Weighted average remaining lease term Operating Lease, Weighted Average Remaining Lease Term 3.250% Senior Notes Due 2026 [Member] 3.250% Senior Notes Due 2026 [Member] 3.250% Senior Notes Due 2026 [Member] Common stock, $0.01 par value; 200,000,000 shares authorized; 157,824,088 and 159,002,338 shares issued and outstanding at June 30, 2020 and December 31, 2019, respectively Common Stock, Value, Outstanding Net cash provided by financing activities Net Cash Provided by (Used in) Financing Activities WTI Cushing Oil Basis Swaps 2021 Oil Basis Swaps 2021 [Member] Oil Basis Swaps 2021 [Member] General and administrative expenses Share-based Payment Arrangement, Expense Expandable amount Line of Credit Facility, Maximum Borrowing Capacity, Subject To Commitments Line of Credit Facility, Maximum Borrowing Capacity, Subject To Commitments Offsetting Assets [Line Items] Offsetting Assets [Line Items] Accrued capital expenditures Accrued Capital Expenditures Accrued Capital Expenditures Position [Axis] Position [Axis] Less: accumulated depreciation Real Estate Owned, Accumulated Depreciation Subsequent Event [Table] Subsequent Event [Table] Floor price (per Bbl) Derivative, Floor Price Exercise of stock and unit options and awards of restricted stock (in Shares) Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Change in ownership of consolidated subsidiaries, net Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Changes, Net Non-controlling interest Stockholders' Equity Attributable to Noncontrolling Interest Granted (in USD per share) Granted (in USD per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Oil and natural gas properties, amortization excluded Not subject to depletion Capitalized Costs of Unproved Properties Excluded from Amortization, Cumulative Gathering and transportation Natural Gas, Gathering, Transportation, Marketing and Processing [Member] Cash flows from investing activities: Net Cash Provided by (Used in) Investing Activities [Abstract] Shares Issued (in Shares) Common Stock, Shares, Issued Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Energen Corporation Merger Energen Corporation Acquisition [Member] Energen Corporation Acquisition [Member] Operating lease liabilities Present value of lease liabilities Operating Lease, Liability Viper revolving credit facility Viper Credit Facility [Member] Revolving credit facility entered into by Viper Energy Partners, LP, a subsidiary of the reporting entity. Long-term debt Long-term Debt, Excluding Current Maturities Segment Reporting [Abstract] Segment Reporting [Abstract] Acquisitions of mineral interests Payments to Acquire Mineral Rights Accounts receivable Increase (Decrease) in Accounts Receivable Debt Instrument [Line Items] Debt Instrument [Line Items] Total Diamondback Energy, Inc. stockholders’ equity Stockholders' Equity Attributable to Parent Public offering costs Payments of Stock Issuance Costs Area of land (in acre) Area of Land Total liabilities and equity Liabilities and Equity Federal Income Tax Note [Table] Federal Income Tax Note [Table] Buildings Buildings and Improvements, Gross Other property, equipment and land Property, Plant and Equipment, Other, Gross Share based compensation arrangement by share based payment maximum award potential Share Based Compensation Arrangement by Share Based Payment Maximum Award Potential The maximum number of shares that can be awarded assuming maximum performance earned. INCOME TAXES Income Tax Disclosure [Text Block] Oil sales Oil Income [Member] Oil Income Portion at Fair Value Measurement Portion at Fair Value Measurement [Member] Incremental compensation Share-based Payment Arrangement, Plan Modification, Incremental Cost Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Restricted Stock Units (RSUs) Restricted Stock Units (RSUs) [Member] Operating lease costs Operating Lease, Cost BRENT Oil Swaption 2021 BRENT Oil Swaption 2021 [Member] BRENT Oil Swaption 2021 [Member] Restricted stock units (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Line of Credit Facility [Line Items] Line of Credit Facility [Line Items] Rattler Midstream LP Long-Term Incentive Plan Rattler Midstream LP Long-Term Incentive Plan [Member] Rattler Midstream LP Long-Term Incentive Plan [Member] Equity Component [Domain] Equity Component [Domain] Derivative instruments Noncurrent assets: derivative instruments Derivative Asset, Noncurrent Entity Address, Address Line One Entity Address, Address Line One Entity Address, Address Line Two Entity Address, Address Line Two REAL ESTATE ASSETS Real Estate Disclosure [Text Block] Net property and equipment Property, Plant and Equipment, Net Revenue from Contracts with Customers Revenue from Contract with Customer [Policy Text Block] Interest expense, net Interest Income (Expense), Nonoperating, Net Interest rate swaps Interest Rate Contract [Member] EQUITY-BASED COMPENSATION Share-based Payment Arrangement [Text Block] Net (loss) income attributable to Diamondback Energy, Inc. Net (loss) income attributable to common stock Net (loss) income attributable to the Company Net Income (Loss) Attributable to Parent Entity Address, State or Province Entity Address, State or Province 2020 (July - December) Lessee, Operating Lease, Liability, to be Paid, Remainder of Fiscal Year Distributions to non-controlling interest Payments to Noncontrolling Interests Investment, Name [Domain] Investment, Name [Domain] Unamortized premium costs Debt Instrument, Unamortized Premium Leases [Abstract] Leases [Abstract] General partners cash contribution General Partners' Contributed Capital Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Total current assets Assets, Current Diesel Price Swaps 2021 Diesel Price Swaps 2021 [Member] Diesel Price Swaps 2021 [Member] Unit-based compensation Noncontrolling Interest, Increase from Unit-based Compensation Noncontrolling Interest, Increase from Unit-based Compensation (Loss) earnings per common share: Earnings Per Share [Abstract] Option price (per Mcf) Derivative, Option Price Derivative, Option Price Other income, net Other Nonoperating Income Depreciation, depletion and amortization Depreciation, Depletion and Amortization Excluding Amortization of Financing Costs Depreciation, Depletion and Amortization Excluding Amortization of Financing Costs Net proceeds from issuance of common units - Viper Energy Partners LP Noncontrolling Interest, Increase from Subsidiary Equity Issuance Stockholders’ equity: Stockholders' Equity Attributable to Parent [Abstract] Timing of inclusion of costs in amortization calculation Timing Of Inclusion Of Costs In Amortization Calculation The period of time over which it is anticipated that unevaluated costs will be included in the amortization base of oil and gas properties. Entity Interactive Data Current Entity Interactive Data Current Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Lease bonus Lease bonus Amount received to extend the lease term. Cumulative percentage of certain payout thresholds Cumulative Percentage Of Certain Payout Thresholds Cumulative Percentage Of Certain Payout Thresholds Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Supplemental disclosure of cash flow information: Supplemental Cash Flow Information [Abstract] Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] Investments, Owned, Federal Income Tax Note [Line Items] Investments, Owned, Federal Income Tax Note [Line Items] The effects of stock-based compensation plans and related costs Share-based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block] Common Stock Common Stock [Member] Property, Plant and Equipment [Line Items] Property, Plant and Equipment [Line Items] Product and Service [Domain] Product and Service [Domain] Property, Plant and Equipment, Type [Domain] Long-Lived Tangible Asset [Domain] Number of letters of credit outstanding Number Of Letters Of Credit Outstanding Number Of Letters Of Credit Outstanding Schedule of real estate assets Real Estate Investment Financial Statements, Disclosure [Table Text Block] Schedule of property and equipment Property, Plant and Equipment [Table Text Block] Remaining borrowing capacity Line of Credit Facility, Remaining Borrowing Capacity Tenant improvements Leasehold Improvements [Member] Oil and natural gas properties: Oil and Gas Property [Abstract] Amarillo Rattler, LLC Amarillo Rattler, LLC [Member] Amarillo Rattler, LLC [Member] Schedule of Equity Method Investments [Line Items] Schedule of Equity Method Investments [Line Items] Debt instrument stated interest rate Debt Instrument, Interest Rate, Stated Percentage Accumulated depletion, depreciation, amortization and impairment Accumulated depletion and depreciation Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Diluted: Earnings Per Share, Diluted [Abstract] Change from net (loss) income attributable to the Company's stockholders and transfers to non-controlling interest Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Change Due to Net Income Attributable to Parent and Effects of Changes, Net Weighted average rate Long-term Debt, Weighted Average Interest Rate, over Time Midstream services Natural Gas, Midstream [Member] Net (decrease) increase in cash and cash equivalents Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Total other (expense) income, net Other expense Nonoperating Income (Expense) Phantom units activity Schedule of Nonvested Share Activity [Table Text Block] Schedule of undiscounted cash flows owned by company to lessors pursuant to contractual agreements Lessee, Operating Lease, Liability, Maturity [Table Text Block] Oil and natural gas properties, net Capitalized Costs, Oil and Gas Producing Activities, Net Basic (in shares) Basic weighted average common units outstanding (in shares) Weighted Average Number of Shares Outstanding, Basic Costs and expenses: Costs and Expenses [Abstract] Risk-free rate Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate Subsequent Events [Abstract] Subsequent Events [Abstract] Ownership [Axis] Ownership [Axis] Sale of Stock [Domain] Sale of Stock [Domain] Ownership [Domain] Ownership [Domain] Reported Value Measurement Reported Value Measurement [Member] Plan Name [Domain] Plan Name [Domain] Equity method interest investment ownership percentage Equity Method Investment, Ownership Percentage REVENUE FROM CONTRACTS WITH CUSTOMERS Revenue from Contract with Customer [Text Block] Interest paid, net of capitalized interest Interest Paid, Excluding Capitalized Interest, Operating Activities Total equity Balance at beginning of period Balance at end of period Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Additional amount of operating lease right of use asset recorded Right-of-Use Asset Obtained in Exchange for Operating Lease Liability Partner Type of Partners' Capital Account, Name [Domain] Partner Type of Partners' Capital Account, Name [Domain] DESCRIPTION OF THE BUSINESS AND BASIS OF PRESENTATION Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Asset retirement obligations Schedule of Asset Retirement Obligations [Table Text Block] Debt, fair value Long-term Debt, Fair Value Total revenues Total revenues Revenues 2020 Three-Way Collars - WTI Magellan East Houston 2020 Three-Way Collars - WTI Magellan East Houston [Member] 2020 Three-Way Collars - WTI Magellan East Houston Class of Stock [Axis] Class of Stock [Axis] Schedule of derivative contracts Schedule of derivative contracts by Company subsequent aggregating weighted average contract Schedule of Derivative Instruments [Table Text Block] Cash received on settlement of derivative instruments Derivative, Cash Received on Hedge (Benefit from) provision for income taxes (Benefit from) provision for income taxes Income Tax Expense (Benefit) Cash, cash equivalents and restricted cash at beginning of period Cash, cash equivalents and restricted cash at end of period Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents DrillCo Agreement DrillCo Agreement [Member] DrillCo Agreement 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] Accumulated impairment Capitalized Costs Accumulated Impairment Capitalized costs of accumulated impairment for oil and natural gas properties Diluted (in USD per share) Diluted net income attributable to common stock (in USD per share) Earnings Per Share, Diluted Interest Rate Swap Three Interest Rate Swap Three [Member] Interest Rate Swap Three [Member] Payment to acquire businesses Payments to Acquire Businesses, Gross Derivative Instruments and Hedging Activities Disclosure [Abstract] Derivative Instruments and Hedging Activities Disclosure [Abstract] Share-based Payment Arrangement, Tranche One Share-based Payment Arrangement, Tranche One [Member] Noncontrolling Interest [Line Items] Noncontrolling Interest [Line Items] Derivative [Line Items] Derivative [Line Items] Accounts receivable: Accounts Receivable, after Allowance for Credit Loss, Current [Abstract] Percentage of preferred cash distribution received General Partners' Capital Account, Percentage Of Preferred Cash Distribution Received General Partners' Capital Account, Percentage Of Preferred Cash Distribution Received Midstream assets Pipeline and Gas Gathering Assets Pipeline and Gas Gathering Assets Outstanding borrowings on revolving credit facility Outstanding borrowings Long-term Debt, Gross Distance of gathering and regional transportation pipelines Distance Of Gathering And Regional Transportation Pipelines Distance Of Gathering And Regional Transportation Pipelines Schedule of long-term debt Schedule of Long-term Debt Instruments [Table Text Block] Net cash received on settlements Gain (Loss) on Sale of Derivatives (Benefit from) provision for deferred income taxes Deferred Income Tax Expense (Benefit) Natural Gas Swaps 2020 - Henry Hub Natural Gas Swaps Henry Hub 2020 [Member] Natural Gas Swaps Henry Hub 2020 [Member] Gross derivative liabilities Derivative Liability, Fair Value, Gross Liability Maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Award Type [Axis] Award Type [Axis] Wells drilled and completed under joint venture agreement Oil and Gas, Exploratory Well Drilled, Net Productive, Number Weighted Average Grant-Date Fair Value Weighted Average Exercise Price (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 [Abstract] Ceiling price (per Bbl) Derivative, Cap Price 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 Maximum Maximum [Member] Security Exchange Name Security Exchange Name Limited partners' capital account, units issued (in Shares) Limited Partners' Capital Account, Units Issued Non-Controlling Interest Noncontrolling Interest [Member] Gain (loss) on revaluation of investment Gain (Loss) on Investments Dividend paid Dividends, Common Stock, Cash Retained Earnings (Accumulated Deficit) Retained Earnings [Member] Measurement Basis [Axis] Measurement Basis [Axis] Distribution to affiliates Payments of Distributions to Affiliates Delaware Basin Delaware Basin [Member] Delaware Basin 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] Effective income tax rate Effective Income Tax Rate Reconciliation, Percent SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Significant Accounting Policies [Text Block] Net cash used in investing activities Net Cash Provided by (Used in) Investing Activities Drilling, completions and non-operated additions to oil and natural gas properties Payments to Explore and Develop Oil and Gas Properties Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Oil Rolling Hedge 2021 Oil Rolling Hedge 2021 [Member] Oil Rolling Hedge 2021 [Member] Award Type [Domain] Award Type [Domain] Document Transition Report Document Transition Report Number of redeterminations Line of Credit Facility, Borrowing Base, Number of Redeterminations Line of Credit Facility, Borrowing Base, Number of Redeterminations 2.875% Senior Notes due 2024 [Member] 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. Collars - WTI (Cushing) 2021 Collars - WTI (Cushing) 2021 [Member] Collars - WTI (Cushing) 2021 [Member] PROPERTY AND EQUIPMENT Property, Plant and Equipment Disclosure [Text Block] Asset Retirement Obligation [Abstract] Asset Retirement Obligation [Abstract] Natural gas liquid sales Natural Gas Liquids Income [Member] Natural Gas Liquids Income Joint interest and other, net Oil and Gas Joint Interest Billing Receivables, Current Repurchase amount Debt Instrument, Repurchase Amount Organization, Consolidation and Presentation of Financial Statements [Abstract] Organization, Consolidation and Presentation of Financial Statements [Abstract] Current liabilities: Liabilities, Current [Abstract] Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Oil Rolling Hedge 2020 Oil Rolling Hedge 2020 [Member] Oil Rolling Hedge 2020 [Member] 7.350% Medium-term Notes, Series A, due 2027 7.35% Medium Term Notes Series A [Member] 7.35% Medium Term Notes Series A [Member] Asset retirement obligation accretion Accretion expense Asset Retirement Obligation, Accretion Expense Recurring Fair Value, Recurring [Member] Total investment in land and buildings, net Real Estate Investment Property, Net New Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Proceeds from borrowings under credit facility Proceeds from Lines of Credit Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Basic: Earnings Per Share, Basic [Abstract]