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Goodwill and Other Intangible Assets - Additional Information (Detail) - USD ($) $ in Millions		1 Months Ended	3 Months Ended	12 Months Ended
	Apr. 20, 2005	Aug. 31, 2018	Mar. 31, 2019	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Finite Lived Intangible Assets [Line Items]
Amortization expense related to intangible assets				$ 192	$ 176	$ 173
Customer Lists [Member] | Empire City [Member]
Finite Lived Intangible Assets [Line Items]
Estimated useful life of intangible assets				4 years
Customer Lists [Member] | MGM Northfield Park [Member]
Finite Lived Intangible Assets [Line Items]
Estimated useful life of intangible assets				7 years
License [Member] | Maryland [Member]
Finite Lived Intangible Assets [Line Items]
Estimated useful life of intangible assets							15 years
Consideration paid for license fee							$ 22
License [Member] | Massachusetts [Member]
Finite Lived Intangible Assets [Line Items]
Estimated useful life of intangible assets		15 years
Consideration paid for license fee		$ 85
MGM Grand Paradise [Member] | Extension Agreement [Member]
Finite Lived Intangible Assets [Line Items]
Extended expiration date of agreement			Jun. 26, 2022
Contract extension premium paid			$ 25
Contract extension fee paid			$ 2
MGM Grand Paradise [Member] | Gaming Sub-concession [Member]
Finite Lived Intangible Assets [Line Items]
Estimated remaining useful life of gaming subconcession	15 years

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Contract extension fee paid.

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The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The cash outflow to acquire asset without physical form usually arising from contractual or other legal rights, excluding goodwill.

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