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Related Party Transactions - Additional Information (Detail) $ in Thousands, shares in Millions							1 Months Ended	3 Months Ended								12 Months Ended
	Feb. 14, 2020 USD ($)	Apr. 01, 2019 USD ($)	Mar. 07, 2019 USD ($) shares	Jan. 29, 2019 USD ($)	Jan. 02, 2019 USD ($)	Sep. 01, 2016 USD ($) shares	Jan. 31, 2019 USD ($)	Dec. 31, 2019 USD ($)	Sep. 30, 2019 USD ($)	Jun. 30, 2019 USD ($)	Mar. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Sep. 30, 2018 USD ($)	Jun. 30, 2018 USD ($)	Mar. 31, 2018 USD ($)	Dec. 31, 2019 USD ($) Term	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)
Related Party Transaction [Line Items]
Revenues								$ 3,185,136	$ 3,314,382	$ 3,223,243	$ 3,176,911	$ 3,052,862	$ 3,029,302	$ 2,858,695	$ 2,822,237	$ 12,899,672	$ 11,763,096	$ 10,797,479
Other Liabilities Noncurrent								$ 4,641,558				259,240				$ 4,641,558	259,240
Initial lease term																10 years
Company initial lease can be extended \| Term																4
Company initial lease additional extension option																5 years
Leasing arrangement description of rent																the possibility for additional 2% increases thereafter subject to the Company meeting an adjusted net revenue to rent ratio, as well as potential increases in percentage rent in year six and every five years thereafter based on a percentage of average actual annual net revenue during the preceding five year period calculated in accordance with the terms under the master lease
Total purchase price			$ 638,000
Purchase price in cash			606,000
Empire City [Member]
Related Party Transaction [Line Items]
Total purchase price				$ 865,000
Empire City [Member] \| Developed Real Property [Member]
Related Party Transaction [Line Items]
Total purchase price							$ 634,000
Liabilities incurred for acquisition							246,000
Increase in annual rent payment							$ 50,000
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			305,000
Base Rent [Member]
Related Party Transaction [Line Items]
Percentage of initial total rent payments due																90.00%
Fixed annual rent escalator percentage								2.00%								2.00%
Additional annual rent escalator percentage																2.00%
Percentage Rent [Member]
Related Party Transaction [Line Items]
Percentage of initial total rent payments due																10.00%
Master Lease [Member]
Related Party Transaction [Line Items]
Fixed annual rent escalator percentage		2.00%
Increase in annual rent payment			$ 50,000
Annual fixed rent, percentage			90.00%
Increase in annual rent per year, percentage			2.00%
Annual rent payments under master lease of properties		$ 946,000					$ 770,000
Master Lease [Member] \| Empire City [Member]
Related Party Transaction [Line Items]
Increase in additional rent payment					$ 50,000
Master Lease [Member] \| Northfield OpCo [Member]
Related Party Transaction [Line Items]
Increase in annual rent payment			$ 60,000
Annual fixed rent, percentage			90.00%
Increase in annual rent per year, percentage			2.00%
Master Lease [Member] \| MGM Northfield Park [Member]
Related Party Transaction [Line Items]
Increase in additional rent payment		$ 60,000
MGM China [Member]
Related Party Transaction [Line Items]
Travel and advertising expenses																$ 6,000
Ordinary shares acquired \| shares						188.1
Grand Paradise Macau [Member]
Related Party Transaction [Line Items]
Deferred cash payment to Grand Paradise Macau						$ 50,000
Other Liabilities Noncurrent								$ 34,000				36,000				34,000	36,000
MGM Growth Properties LLC [Member] \| Northfield OpCo [Member]
Related Party Transaction [Line Items]
Redemption of operating partnership units \| shares			9.0
Shun Tak [Member] \| MGM China [Member]
Related Party Transaction [Line Items]
Expenses incurred																16,000	17,000	13,000
Ms Ho Pansy Catilina Chiu King [Member] \| MGM Branding and Development [Member]
Related Party Transaction [Line Items]
Distribution made to noncontrolling interests																$ 20,000	22,000	15,000
Blackstone Real Estate Income Trust [Member] \| Bellagio [Member] \| Real Estate Assets and Leased Back [Member]
Related Party Transaction [Line Items]
Ownership interest								5.00%								5.00%
Blackstone Real Estate Income Trust [Member] \| Subsequent Event [Member] \| MGP [Member] \| Lease Agreements [Member]
Related Party Transaction [Line Items]
Ownership interest	50.10%
CityCenter Holdings, LLC [Member]
Related Party Transaction [Line Items]
Revenues																$ 48,000	47,000	49,000
CityCenter Holdings, LLC [Member] \| Aria and Vdara [Member]
Related Party Transaction [Line Items]
Management fee as a percentage of revenue																2.00%
Management fee received, percentage of EBITDA																5.00%
CityCenter Holdings, LLC [Member] \| Management Services and Reimbursable Costs [Member]
Related Party Transaction [Line Items]
Reimbursable costs for support services provided																$ 420,000	409,000	$ 390,000
Receivable related to management services and reimbursable costs								$ 66,000				$ 83,000				$ 66,000	$ 83,000
Mandalay Bay [Member] \| Master Lease [Member] \| Subsequent Event [Member]
Related Party Transaction [Line Items]
Decrease in annual rent payment	$ 133,000