Segment Information - Schedule of Segment Information (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Segment Reporting Information [Line Items]
Net revenue	$ 2,822,237	$ 2,717,566
Casino	1,394,316	1,271,474
Rooms	539,480	558,812
Food and beverage	455,411	469,336
Entertainment, retail and other	329,750	317,729
Other operating expense
Preopening and start-up expenses	(66,917)	(15,066)
Property transactions, net	(5,898)	(1,696)
Depreciation and amortization	(268,822)	(249,769)
Operating income	359,757	496,511
Non-operating expense
Interest expense, net of amounts capitalized	(167,909)	(174,059)
Non-operating items from unconsolidated affiliates	(9,010)	(6,921)
Other, net	(1,916)	(817)
Total non-operating income (expense)	(178,835)	(181,797)
Income before income taxes	180,922	314,714
Benefit (provision) for income taxes	85,379	(62,140)
Net income	266,301	252,574
Less: Net income attributable to noncontrolling interests	(42,857)	(46,162)
Net income attributable to MGM Resorts International	223,444	206,412
Reportable segments [Member]
Segment Reporting Information [Line Items]
Net revenue	2,694,533	2,597,381
Adjusted Property EBITDA	768,118	792,394
Reportable segments [Member] | Domestic Resorts [Member]
Segment Reporting Information [Line Items]
Net revenue	2,098,672	2,121,965
Casino	840,697	821,666
Rooms	519,646	545,591
Food and beverage	434,674	457,928
Entertainment, retail and other	303,655	296,780
Adjusted Property EBITDA	616,367	647,197
Reportable segments [Member] | MGM China [Member]
Segment Reporting Information [Line Items]
Net revenue	595,861	475,416
Casino	550,595	448,947
Rooms	19,834	13,220
Food and beverage	20,737	11,409
Entertainment, retail and other	4,695	1,840
Adjusted Property EBITDA	151,751	145,197
Corporate and other [Member]
Segment Reporting Information [Line Items]
Net revenue	127,704	120,185
Other operating expense
Corporate and other	$ (66,724)	$ (29,352)