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Goodwill and Other Intangible Assets - Schedule of Goodwill and Other Intangible Assets (Detail) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Goodwill And Intangible Assets [Line Items]
Goodwill	$ 2,084,564	$ 1,821,392	$ 1,806,531
Total indefinite-lived intangible assets	678,310	638,120
Finite-lived intangible assets, net	3,148,194	3,306,343
Total other intangible assets, net	3,826,504	3,944,463
Trademarks, License Rights and Other [Member]
Goodwill And Intangible Assets [Line Items]
Total indefinite-lived intangible assets	352,212	312,022
Customer Lists [Member]
Goodwill And Intangible Assets [Line Items]
Finite-lived intangible assets, gross	202,347	174,679
Less: Accumulated amortization	(161,892)	(151,465)
Finite-lived intangible assets, net	40,455	23,214
Finite-Lived Gaming Licenses and Other Intangible Assets [Member]
Goodwill And Intangible Assets [Line Items]
Finite-lived intangible assets, gross	141,327	136,127
Less: Accumulated amortization	(38,374)	(31,053)
Finite-lived intangible assets, net	102,953	105,074
Northfield Park associates LLC [Member] | Racing and Gaming Licenses [Member]
Goodwill And Intangible Assets [Line Items]
Total indefinite-lived intangible assets	228,000	228,000
Detroit Wholly Owned Subsidiary | Development Rights [Member]
Goodwill And Intangible Assets [Line Items]
Total indefinite-lived intangible assets	98,098	98,098
MGM Grand Paradise [Member] | Gaming Sub-concession [Member]
Goodwill And Intangible Assets [Line Items]
Finite-lived intangible assets, gross	4,519,558	4,468,766
Less: Accumulated amortization	(1,514,772)	(1,342,561)
Finite-lived intangible assets, net	3,004,786	3,126,205
MGM Macau [Member] | Land Concession [Member]
Goodwill And Intangible Assets [Line Items]
Finite-lived intangible assets, gross	0	83,885
Less: Accumulated amortization	0	(32,035)
Finite-lived intangible assets, net	$ 0	$ 51,850

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