Document and Entity Information - shares
6 Months Ended
Jun. 30, 2019
Aug. 02, 2019
Document and Entity Information [Abstract]    
Document type 10-Q  
Document Quarterly Report true  
Document Period End Date Jun. 30, 2019  
Document Transition Report false  
Entity File Number 001-35700  
Entity Registrant Name Diamondback Energy, Inc.  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 45-4502447  
Entity Address, Address Line One 500 West Texas  
Entity Address, Address Line Two Suite 1200  
Entity Address, City or Town Midland,  
Entity Address, State or Province TX  
Entity Address, Postal Zip Code 79701  
City Area Code 432  
Local Phone Number 221-7400  
Title of 12(b) Security Common Stock  
Trading Symbol FANG  
Security Exchange Name NASDAQ  
Entity Common Stock, Shares Outstanding   163,043,443
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Large Accelerated Filer  
Entity Small Business false  
Entity Emerging Growth Company false  
Entity Shell Company false  
Amendment Flag false  
Document Fiscal Year Focus 2019  
Document Fiscal Period Focus Q2  
Entity Central Index Key 0001539838  
Current Fiscal Year End Date --12-31