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Basis of Presentation and Significant Accounting Policies - Additional Information (Detail) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Dec. 31, 2019
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]          
Percentage of ownership interest     100.00%    
Percentage of minority interest 43.30%   43.30%    
Total assets $ 37,471,285   $ 37,471,285   $ 33,876,356
Investments in and advances to unconsolidated affiliates 1,468,495   1,468,495   $ 822,366
Commissions, complimentaries and other incentives 71,000 $ 601,000 526,000 $ 1,200,000  
Food and Beverage Revenue [Member]          
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]          
Lease revenue 5,000 13,000 15,000 25,000  
Entertainment Retail and Other Revenue [Member]          
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]          
Lease revenue 14,000 $ 22,000 $ 33,000 $ 44,000  
Bellagio Blackstone Real Estate Income Trust [Member]          
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]          
Percentage of ownership interest     5.00%    
Investments in and advances to unconsolidated affiliates 60,000   $ 60,000    
MGM Growth Properties LLC [Member]          
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]          
Total assets 10,800,000   10,800,000    
Total liabilities $ 4,500,000   $ 4,500,000