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Goodwill and Other Intangible Assets - Schedule of Goodwill and Other Intangible Assets (Detail) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Goodwill And Intangible Assets [Line Items]      
Goodwill $ 3,480,997 $ 2,091,278 $ 2,084,564
Total indefinite-lived intangible assets 857,336 677,336  
Total finite-lived intangible assets, net 2,759,049 2,966,412  
Total other intangible assets, net 3,616,385 3,643,748  
Trademarks And Other      
Goodwill And Intangible Assets [Line Items]      
Total indefinite-lived intangible assets 479,238 299,238  
Other Finite-lived Intangible Assets      
Goodwill And Intangible Assets [Line Items]      
Finite-lived intangible assets: 65,207 60,649  
Less: Accumulated amortization (37,862) (26,244)  
Total finite-lived intangible assets, net 27,345 34,405  
MGM Northfield Park and Empire City | Racing and Gaming Licenses      
Goodwill And Intangible Assets [Line Items]      
Total indefinite-lived intangible assets 280,000 280,000  
Detroit Wholly Owned Subsidiary | Development Rights      
Goodwill And Intangible Assets [Line Items]      
Total indefinite-lived intangible assets 98,098 98,098  
MGM Grand Paradise | Gaming Sub-concession      
Goodwill And Intangible Assets [Line Items]      
Finite-lived intangible assets: 4,516,532 4,541,990  
Less: Accumulated amortization (1,865,219) (1,697,481)  
Total finite-lived intangible assets, net 2,651,313 2,844,509  
MGM National Harbor and MGM Springfield Gaming Licenses      
Goodwill And Intangible Assets [Line Items]      
Finite-lived intangible assets: 106,600 106,600  
Less: Accumulated amortization (26,209) (19,102)  
Total finite-lived intangible assets, net $ 80,391 $ 87,498