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Related Party Transactions - Additional Information (Detail) - USD ($) shares in Millions, $ in Millions				1 Months Ended		3 Months Ended		9 Months Ended
	Apr. 01, 2019	Mar. 07, 2019	Jan. 29, 2019	Mar. 31, 2019	Jan. 31, 2019	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Related Party Transaction [Line Items]
Total purchase price		$ 638
Purchase price in cash		606
Master Lease [Member]
Related Party Transaction [Line Items]
Increase in annual rent payment		$ 50
Annual fixed rent, percentage		90.00%
Increase in annual rent per year, percentage		2.00%
Annual rent payments under master lease of properties	$ 946			$ 870	$ 770
Empire City [Member]
Related Party Transaction [Line Items]
Total purchase price			$ 865
Empire City [Member] | Developed Real Property [Member]
Related Party Transaction [Line Items]
Total purchase price					634
Liabilities incurred for acquisition					246
Increase in annual rent payment					$ 50
Annual fixed rent, percentage					90.00%
Increase in annual rent per year, percentage					2.00%
Northfield OpCo [Member]
Related Party Transaction [Line Items]
Total purchase price	305
Northfield OpCo [Member] | Master Lease [Member]
Related Party Transaction [Line Items]
Increase in annual rent payment	$ 60
Annual fixed rent, percentage	90.00%
Increase in annual rent per year, percentage	2.00%
MGM Branding and Development [Member] | Ms Ho Pansy Catilina Chiu King [Member]
Related Party Transaction [Line Items]
Distribution made to noncontrolling interests						$ 5	$ 4	$ 15	$ 17
MGM Growth Properties LLC [Member] | Northfield OpCo [Member]
Related Party Transaction [Line Items]
Redemption of operating partnership units	9

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