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Segment Information - Schedule of Segment Information (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Revenues
Revenues	$ 3,176,911	$ 2,822,237
Other operating income (expense)
Preopening and start-up expenses	(3,287)	(66,917)
Property transactions, net	(8,776)	(5,898)
Depreciation and amortization	(316,414)	(268,822)
Restructuring	(41,098)	0
Operating income	370,260	359,757
Non-operating income (expense)
Interest expense, net of amounts capitalized	(216,120)	(167,909)
Non-operating items from unconsolidated affiliates	(18,165)	(9,010)
Other, net	1,693	(1,916)
Total non-operating income (expense)	(232,592)	(178,835)
Income before income taxes	137,668	180,922
Benefit (provision) for income taxes	(71,511)	85,379
Net income	66,157	266,301
Less: Net income attributable to noncontrolling interests	(34,860)	(42,857)
Net income attributable to MGM Resorts International	31,297	223,444
Reportable segments [Member]
Revenues
Revenues	2,966,337	2,694,533
Adjusted Property EBITDA	800,891	768,118
Reportable segments [Member] | Las Vegas Strip Resorts [Member]
Revenues
Revenues	1,428,188	1,432,104
Adjusted Property EBITDA	403,527	449,154
Reportable segments [Member] | Regional Operations [Member]
Revenues
Revenues	803,945	666,568
Adjusted Property EBITDA	206,574	167,213
Reportable segments [Member] | MGM China [Member]
Revenues
Revenues	734,204	595,861
Adjusted Property EBITDA	190,790	151,751
Corporate and other [Member]
Revenues
Revenues	210,574	127,704
Other operating income (expense)
Corporate and other	(61,056)	(66,724)
Casino [Member]
Revenues
Revenues	1,626,346	1,394,316
Casino [Member] | Reportable segments [Member] | Las Vegas Strip Resorts [Member]
Revenues
Revenues	324,704	372,820
Casino [Member] | Reportable segments [Member] | Regional Operations [Member]
Revenues
Revenues	574,156	467,877
Casino [Member] | Reportable segments [Member] | MGM China [Member]
Revenues
Revenues	663,565	550,595
Rooms [Member]
Revenues
Revenues	574,215	539,480
Rooms [Member] | Reportable segments [Member] | Las Vegas Strip Resorts [Member]
Revenues
Revenues	468,852	448,597
Rooms [Member] | Reportable segments [Member] | Regional Operations [Member]
Revenues
Revenues	71,798	71,049
Rooms [Member] | Reportable segments [Member] | MGM China [Member]
Revenues
Revenues	33,564	19,834
Food and Beverage [Member]
Revenues
Revenues	520,221	455,411
Food and Beverage [Member] | Reportable segments [Member] | Las Vegas Strip Resorts [Member]
Revenues
Revenues	365,522	339,509
Food and Beverage [Member] | Reportable segments [Member] | Regional Operations [Member]
Revenues
Revenues	117,879	95,165
Food and Beverage [Member] | Reportable segments [Member] | MGM China [Member]
Revenues
Revenues	30,713	20,737
Entertainment, Retail and Other [Member]
Revenues
Revenues	344,374	329,750
Entertainment, Retail and Other [Member] | Reportable segments [Member] | Las Vegas Strip Resorts [Member]
Revenues
Revenues	269,110	271,178
Entertainment, Retail and Other [Member] | Reportable segments [Member] | Regional Operations [Member]
Revenues
Revenues	40,112	32,477
Entertainment, Retail and Other [Member] | Reportable segments [Member] | MGM China [Member]
Revenues
Revenues	$ 6,362	$ 4,695

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Earnings before interest and other non-operating income (expense), taxes, depreciation and amortization, preopening and start-up expenses, and property transactions, net. Also excludes corporate expense and stock compensation expense, which are not allocated to each property.

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