Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2017	May 01, 2017
Document Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2017
Document Fiscal Year Focus	2017
Document Fiscal Period Focus	Q1
Trading Symbol	MGP
Entity Registrant Name	MGM Growth Properties LLC
Entity Central Index Key	0001656936
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer
Class A Shares
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		57,662,330
Class B Share
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		1
MGP Operating Partnership
Document Information [Line Items]
Entity Registrant Name	MGM Growth Properties Operating Partnership LP
Entity Central Index Key	0001691299
Entity Filer Category	Non-accelerated Filer