UNITHOLDERS’ EQUITY AND PARTNERSHIP DISTRIBUTIONS - Narrative (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended	6 Months Ended
	Mar. 31, 2019	Mar. 31, 2020	Jun. 30, 2020	Jul. 31, 2020	Dec. 31, 2019
Limited Partners' Capital Account [Line Items]
Dedication period remaining		2 years	4 years
Cash Distribution
Limited Partners' Capital Account [Line Items]
Percentage of cash available		25.00%
Cash distributions, period after end of each quarter			60 days
Common Units
Limited Partners' Capital Account [Line Items]
Limited partners' capital account, units issued (in shares)			67,831,342		67,805,707
Limited partners' capital account, units outstanding (in shares)			67,831,342		67,805,707
Common Units | Follow-on Public Offering
Limited Partners' Capital Account [Line Items]
Common units issued in public offerings (in shares)	10,925,000
Net proceeds from offering	$ 340.6
Common Units | Over-Allotment Option
Limited Partners' Capital Account [Line Items]
Common units issued in public offerings (in shares)	1,425,000
Common Units | Diamondback Energy, Inc.
Limited Partners' Capital Account [Line Items]
Limited partners' capital account, units outstanding (in shares)			731,500
Class B Units
Limited Partners' Capital Account [Line Items]
Limited partners' capital account, units issued (in shares)			90,709,946		90,709,946
Limited partners' capital account, units outstanding (in shares)			90,709,946	90,709,946	90,709,946
Class B Units | Diamondback Energy, Inc.
Limited Partners' Capital Account [Line Items]
Limited partners' capital account, units outstanding (in shares)			90,709,946
Viper Energy Partners LP | Diamondback Energy, Inc.
Limited Partners' Capital Account [Line Items]
Percent of limited partnership interest	54.00%		58.00%