Income Taxes - Additional Information (Detail) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Income Tax Disclosure [Line Items]
Effective income tax rate	(11.30%)	(620.80%)	(8.90%)	33.90%
Income tax expense (benefit)	$ (76,734,000)	$ (7,276,000)	$ (84,668,000)	$ 75,969,000
MGM Grand Paradise SA [Member]
Income Tax Disclosure [Line Items]
Complementary tax rate on distributions of gaming profits (as a percent)			12.00%
Accrued amount	0		$ 0
Macau [Member]
Income Tax Disclosure [Line Items]
Increase in tax credit carry forward valuation allowance			25,000,000
Increase in foreign tax credit carry forward valuation allowance	$ 1,000,000		28,000,000
Income tax expense (benefit)			$ (6,000,000)
Special gaming tax rate			35.00%
Macau [Member] | MGM Grand Paradise SA [Member]
Income Tax Disclosure [Line Items]
Complementary tax rate on distributions of gaming profits (as a percent)			12.00%
Macau [Member] | MGP BREIT Venture [Member]
Income Tax Disclosure [Line Items]
Income tax expense (benefit)			$ 349,000,000