Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2019	Jul. 31, 2019
Document Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q2
Entity Registrant Name	Brigham Minerals, Inc.
Entity Central Index Key	0001745797
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	true
Entity Ex Transition Period	false
Entity Current Reporting Status	Yes
Entity Shell Company	false
Class A Common Stock
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		21,997,198
Class B Common Stock
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		28,777,802