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Organization - Additional Information (Detail)
$ in Millions
1 Months Ended 3 Months Ended 6 Months Ended
Jun. 30, 2019
Apr. 30, 2019
Mar. 31, 2019
USD ($)
Jan. 31, 2019
Jun. 30, 2019
Mar. 31, 2019
Jun. 30, 2019
Segment
Dec. 31, 2018
Organization Disclosure [Line Items]                
Percentage of minority interest 31.70%       31.70%   31.70%  
Number of reportable segments | Segment             3  
CityCenter Holdings LLC As Investee [Member]                
Organization Disclosure [Line Items]                
Percentage ownership interest 50.00%       50.00%   50.00% 50.00%
Las Vegas Arena Company LLC As Investee [Member]                
Organization Disclosure [Line Items]                
Percentage ownership interest 42.50%       42.50%   42.50% 42.50%
Infinity World Development Corp [Member] | CityCenter Holdings LLC As Investee [Member]                
Organization Disclosure [Line Items]                
Percentage ownership interest 50.00%       50.00%   50.00%  
Anschutz Entertainment Group, Inc [Member] | Las Vegas Arena Company LLC As Investee [Member]                
Organization Disclosure [Line Items]                
Percentage ownership interest 42.50%       42.50%   42.50%  
Athena Arena, LLC [Member] | Las Vegas Arena Company LLC As Investee [Member]                
Organization Disclosure [Line Items]                
Percentage ownership interest 15.00%       15.00%   15.00%  
Hard Rock Rocksino Northfield Park [Member]                
Organization Disclosure [Line Items]                
Date of acquisition agreement             2019-04  
Class A shares [Member]                
Organization Disclosure [Line Items]                
Common stock voting rights             one vote per share  
Partnership interest       69.70%        
Non-Guarantor MGP Subsidiaries [Member] | Class B shares [Member]                
Organization Disclosure [Line Items]                
Common stock voting rights             Class B share, is entitled to an amount of votes representing a majority of the total voting power of MGP’s shares so long as the Company and its controlled affiliates’ (excluding MGP) aggregate beneficial ownership of the combined economic interests in MGP and the Operating Partnership does not fall below 30%.  
MGM Growth Properties LLC [Member]                
Organization Disclosure [Line Items]                
Minimum ownership percentage required for majority voting interest             30.00%  
Partnership interest 68.30% 68.80% 69.80% 74.60%        
Percentage of minority interest 31.70%       31.70%   31.70%  
MGM Growth Properties LLC [Member] | Class A shares [Member]                
Organization Disclosure [Line Items]                
Partnership interest         68.30%      
MGM China [Member]                
Organization Disclosure [Line Items]                
Percentage ownership interest           56.00%    
MGM Grand Paradise [Member] | Extension Agreement [Member]                
Organization Disclosure [Line Items]                
Agreement expiration date     Mar. 31, 2020          
Extended expiration date of agreement     Jun. 26, 2022          
Contract extension premium paid     $ 25          
Contract extension fee paid     $ 2