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Acquisitions - Additional Information (Details) - USD ($)
$ in Millions
1 Months Ended 3 Months Ended 8 Months Ended
Mar. 07, 2019
Jan. 29, 2019
Dec. 31, 2024
Jun. 30, 2019
Sep. 30, 2019
Jul. 06, 2018
Business Acquisition [Line Items]            
Total purchase price $ 638          
Empire City [Member]            
Business Acquisition [Line Items]            
Date of acquisition agreement   Jan. 29, 2019        
Total purchase price   $ 865        
Consideration in form of common stock   $ 266        
Percentage of membership interest acquired   100.00%        
Business acquisition, decrease to the racing and gaming license       $ 76    
Business acquisition, decrease to other intangible assets       17    
Business acquisition, decrease to deferred income taxes       $ 20    
Revenue         $ 143  
Operating income         13  
Net income         $ 28  
Empire City [Member] | MGM Growth Properties LLC [Member] | Gaming License And Trade Name            
Business Acquisition [Line Items]            
Estimated useful life of intangible assets   4 years        
Empire City [Member] | MGM Growth Properties LLC [Member] | Customer List [Member]            
Business Acquisition [Line Items]            
Estimated useful life of intangible assets   5 years        
Empire City [Member] | Forecast [Member]            
Business Acquisition [Line Items]            
Additional contingent consideration payable     $ 50      
Northfield Park associates LLC [Member] | MGM Growth Properties LLC [Member]            
Business Acquisition [Line Items]            
Percentage of membership interest acquired           100.00%