ACQUISITIONS AND DIVESTITURES  - Schedule Of Business Acquisition Consideration Paid (Details) - QEP $ / shares in Units, $ in Millions	Mar. 17, 2021 USD ($) $ / shares shares
Business Acquisition [Line Items]
Eligible shares of QEP common stock to be converted into shares of Diamondback common stock (in shares)	238,153,000
Shares of QEP equity awards included in precombination consideration (in shares)	4,221,000
Total shares of QEP common stock eligible for merger consideration (in shares)	242,374,000
Exchange ratio	0.050
Additional shares of Diamondback common stock to be issued as merger consideration (in shares)	12,119,000
Business acquisition, share price (USD per share) | $ / shares	$ 81.41
Business combination, fair value of consideration | $	$ 987