STOCKHOLDERS’ EQUITY AND EARNINGS PER SHARE - Change in Ownership of Consolidated Subsidiaries (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Net income (loss) attributable to Diamondback Energy, Inc.	$ 2,182	$ (4,517)	$ 240
Change in ownership of consolidated subsidiaries, net	(19)	(8)	12
Additional Paid-in Capital
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Change in ownership of consolidated subsidiaries, net	66	358	(33)
Rattler LLC
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Change in ownership of consolidated subsidiaries, net		329
Rattler LLC | Additional Paid-in Capital
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Change in ownership of consolidated subsidiaries, net		329
Limited Partner
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Net income (loss) attributable to Diamondback Energy, Inc.	2,182	(4,517)	240
Change in ownership of consolidated subsidiaries, net	66	358	(33)
Change from net income (loss) attributable to the Company's stockholders and transfers to non-controlling interest	$ 2,248	$ (4,159)	$ 207