Stockholders' Equity - Changes in Stockholders' Equity (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Class Of Stock [Line Items]
Balances, January 1, 2017	$ 9,969,312
Balances, January 1, 2017	6,220,180
Balances, January 1, 2017	3,749,132
Net income attributable to MGM Resorts International	206,847	$ 66,799
Net income	250,889
Currency translation adjustment	(12,933)	(4,765)
Other comprehensive loss - cash flow hedges	(634)	$ 0
Stock-based compensation	15,966
Issuance of common stock pursuant to stock-based compensation awards	(4,074)
Issuance of performance share units	9,743
Distributions to noncontrolling interest owners	(2,044)
Dividend paid to common shareholders	(63,182)
Dividend payable to noncontrolling interest owners	(22,281)
Other	(45)
Balances, March 31, 2017	10,140,717
Balances, March 31, 2017	6,376,495
Balances, March 31, 2017	3,764,222
MGM Resorts Stockholders' Equity [Member]
Class Of Stock [Line Items]
Balances, January 1, 2017	6,220,180
Net income attributable to MGM Resorts International	206,847
Currency translation adjustment	(7,352)
Other comprehensive loss - cash flow hedges	(484)
Stock-based compensation	14,946
Issuance of common stock pursuant to stock-based compensation awards	(4,074)
Issuance of performance share units	9,648
Distributions to noncontrolling interest owners	0
Dividend paid to common shareholders	(63,182)
Dividend payable to noncontrolling interest owners	0
Other	(34)
Balances, March 31, 2017	6,376,495
Non-controlling Interests [Member]
Class Of Stock [Line Items]
Balances, January 1, 2017	3,749,132
Net income	44,042
Currency translation adjustment	(5,581)
Other comprehensive loss - cash flow hedges	(150)
Stock-based compensation	1,020
Issuance of common stock pursuant to stock-based compensation awards	0
Issuance of performance share units	95
Distributions to noncontrolling interest owners	(2,044)
Dividend paid to common shareholders	0
Dividend payable to noncontrolling interest owners	(22,281)
Other	(11)
Balances, March 31, 2017	$ 3,764,222